| /* Remote target communications for serial-line targets in custom GDB protocol |
| |
| Copyright (C) 1988-2016 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| /* See the GDB User Guide for details of the GDB remote protocol. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include <fcntl.h> |
| #include "inferior.h" |
| #include "infrun.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "target.h" |
| /*#include "terminal.h" */ |
| #include "gdbcmd.h" |
| #include "objfiles.h" |
| #include "gdb-stabs.h" |
| #include "gdbthread.h" |
| #include "remote.h" |
| #include "remote-notif.h" |
| #include "regcache.h" |
| #include "value.h" |
| #include "observer.h" |
| #include "solib.h" |
| #include "cli/cli-decode.h" |
| #include "cli/cli-setshow.h" |
| #include "target-descriptions.h" |
| #include "gdb_bfd.h" |
| #include "filestuff.h" |
| #include "rsp-low.h" |
| #include "disasm.h" |
| #include "location.h" |
| |
| #include "gdb_sys_time.h" |
| |
| #include "event-loop.h" |
| #include "event-top.h" |
| #include "inf-loop.h" |
| |
| #include <signal.h> |
| #include "serial.h" |
| |
| #include "gdbcore.h" /* for exec_bfd */ |
| |
| #include "remote-fileio.h" |
| #include "gdb/fileio.h" |
| #include <sys/stat.h> |
| #include "xml-support.h" |
| |
| #include "memory-map.h" |
| |
| #include "tracepoint.h" |
| #include "ax.h" |
| #include "ax-gdb.h" |
| #include "agent.h" |
| #include "btrace.h" |
| |
| /* Temp hacks for tracepoint encoding migration. */ |
| static char *target_buf; |
| static long target_buf_size; |
| |
| /* Per-program-space data key. */ |
| static const struct program_space_data *remote_pspace_data; |
| |
| /* The variable registered as the control variable used by the |
| remote exec-file commands. While the remote exec-file setting is |
| per-program-space, the set/show machinery uses this as the |
| location of the remote exec-file value. */ |
| static char *remote_exec_file_var; |
| |
| /* The size to align memory write packets, when practical. The protocol |
| does not guarantee any alignment, and gdb will generate short |
| writes and unaligned writes, but even as a best-effort attempt this |
| can improve bulk transfers. For instance, if a write is misaligned |
| relative to the target's data bus, the stub may need to make an extra |
| round trip fetching data from the target. This doesn't make a |
| huge difference, but it's easy to do, so we try to be helpful. |
| |
| The alignment chosen is arbitrary; usually data bus width is |
| important here, not the possibly larger cache line size. */ |
| enum { REMOTE_ALIGN_WRITES = 16 }; |
| |
| /* Prototypes for local functions. */ |
| static void async_cleanup_sigint_signal_handler (void *dummy); |
| static int getpkt_sane (char **buf, long *sizeof_buf, int forever); |
| static int getpkt_or_notif_sane (char **buf, long *sizeof_buf, |
| int forever, int *is_notif); |
| |
| static void async_handle_remote_sigint (int); |
| static void async_handle_remote_sigint_twice (int); |
| |
| static void remote_files_info (struct target_ops *ignore); |
| |
| static void remote_prepare_to_store (struct target_ops *self, |
| struct regcache *regcache); |
| |
| static void remote_open_1 (const char *, int, struct target_ops *, |
| int extended_p); |
| |
| static void remote_close (struct target_ops *self); |
| |
| struct remote_state; |
| |
| static int remote_vkill (int pid, struct remote_state *rs); |
| |
| static void remote_kill_k (void); |
| |
| static void remote_mourn (struct target_ops *ops); |
| |
| static void extended_remote_restart (void); |
| |
| static void remote_send (char **buf, long *sizeof_buf_p); |
| |
| static int readchar (int timeout); |
| |
| static void remote_serial_write (const char *str, int len); |
| |
| static void remote_kill (struct target_ops *ops); |
| |
| static int remote_can_async_p (struct target_ops *); |
| |
| static int remote_is_async_p (struct target_ops *); |
| |
| static void remote_async (struct target_ops *ops, int enable); |
| |
| static void remote_thread_events (struct target_ops *ops, int enable); |
| |
| static void sync_remote_interrupt_twice (int signo); |
| |
| static void interrupt_query (void); |
| |
| static void set_general_thread (struct ptid ptid); |
| static void set_continue_thread (struct ptid ptid); |
| |
| static void get_offsets (void); |
| |
| static void skip_frame (void); |
| |
| static long read_frame (char **buf_p, long *sizeof_buf); |
| |
| static int hexnumlen (ULONGEST num); |
| |
| static void init_remote_ops (void); |
| |
| static void init_extended_remote_ops (void); |
| |
| static void remote_stop (struct target_ops *self, ptid_t); |
| |
| static int stubhex (int ch); |
| |
| static int hexnumstr (char *, ULONGEST); |
| |
| static int hexnumnstr (char *, ULONGEST, int); |
| |
| static CORE_ADDR remote_address_masked (CORE_ADDR); |
| |
| static void print_packet (const char *); |
| |
| static void compare_sections_command (char *, int); |
| |
| static void packet_command (char *, int); |
| |
| static int stub_unpack_int (char *buff, int fieldlength); |
| |
| static ptid_t remote_current_thread (ptid_t oldptid); |
| |
| static int putpkt_binary (const char *buf, int cnt); |
| |
| static void check_binary_download (CORE_ADDR addr); |
| |
| struct packet_config; |
| |
| static void show_packet_config_cmd (struct packet_config *config); |
| |
| static void show_remote_protocol_packet_cmd (struct ui_file *file, |
| int from_tty, |
| struct cmd_list_element *c, |
| const char *value); |
| |
| static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid); |
| static ptid_t read_ptid (char *buf, char **obuf); |
| |
| static void remote_set_permissions (struct target_ops *self); |
| |
| static int remote_get_trace_status (struct target_ops *self, |
| struct trace_status *ts); |
| |
| static int remote_upload_tracepoints (struct target_ops *self, |
| struct uploaded_tp **utpp); |
| |
| static int remote_upload_trace_state_variables (struct target_ops *self, |
| struct uploaded_tsv **utsvp); |
| |
| static void remote_query_supported (void); |
| |
| static void remote_check_symbols (void); |
| |
| void _initialize_remote (void); |
| |
| struct stop_reply; |
| static void stop_reply_xfree (struct stop_reply *); |
| static void remote_parse_stop_reply (char *, struct stop_reply *); |
| static void push_stop_reply (struct stop_reply *); |
| static void discard_pending_stop_replies_in_queue (struct remote_state *); |
| static int peek_stop_reply (ptid_t ptid); |
| |
| struct threads_listing_context; |
| static void remove_new_fork_children (struct threads_listing_context *); |
| |
| static void remote_async_inferior_event_handler (gdb_client_data); |
| |
| static void remote_terminal_ours (struct target_ops *self); |
| |
| static int remote_read_description_p (struct target_ops *target); |
| |
| static void remote_console_output (char *msg); |
| |
| static int remote_supports_cond_breakpoints (struct target_ops *self); |
| |
| static int remote_can_run_breakpoint_commands (struct target_ops *self); |
| |
| static void remote_btrace_reset (void); |
| |
| static int stop_reply_queue_length (void); |
| |
| static void readahead_cache_invalidate (void); |
| |
| /* For "remote". */ |
| |
| static struct cmd_list_element *remote_cmdlist; |
| |
| /* For "set remote" and "show remote". */ |
| |
| static struct cmd_list_element *remote_set_cmdlist; |
| static struct cmd_list_element *remote_show_cmdlist; |
| |
| /* Stub vCont actions support. |
| |
| Each field is a boolean flag indicating whether the stub reports |
| support for the corresponding action. */ |
| |
| struct vCont_action_support |
| { |
| /* vCont;t */ |
| int t; |
| |
| /* vCont;r */ |
| int r; |
| |
| /* vCont;s */ |
| int s; |
| |
| /* vCont;S */ |
| int S; |
| }; |
| |
| /* Controls whether GDB is willing to use range stepping. */ |
| |
| static int use_range_stepping = 1; |
| |
| #define OPAQUETHREADBYTES 8 |
| |
| /* a 64 bit opaque identifier */ |
| typedef unsigned char threadref[OPAQUETHREADBYTES]; |
| |
| /* About this many threadisds fit in a packet. */ |
| |
| #define MAXTHREADLISTRESULTS 32 |
| |
| /* Data for the vFile:pread readahead cache. */ |
| |
| struct readahead_cache |
| { |
| /* The file descriptor for the file that is being cached. -1 if the |
| cache is invalid. */ |
| int fd; |
| |
| /* The offset into the file that the cache buffer corresponds |
| to. */ |
| ULONGEST offset; |
| |
| /* The buffer holding the cache contents. */ |
| gdb_byte *buf; |
| /* The buffer's size. We try to read as much as fits into a packet |
| at a time. */ |
| size_t bufsize; |
| |
| /* Cache hit and miss counters. */ |
| ULONGEST hit_count; |
| ULONGEST miss_count; |
| }; |
| |
| /* Description of the remote protocol state for the currently |
| connected target. This is per-target state, and independent of the |
| selected architecture. */ |
| |
| struct remote_state |
| { |
| /* A buffer to use for incoming packets, and its current size. The |
| buffer is grown dynamically for larger incoming packets. |
| Outgoing packets may also be constructed in this buffer. |
| BUF_SIZE is always at least REMOTE_PACKET_SIZE; |
| REMOTE_PACKET_SIZE should be used to limit the length of outgoing |
| packets. */ |
| char *buf; |
| long buf_size; |
| |
| /* True if we're going through initial connection setup (finding out |
| about the remote side's threads, relocating symbols, etc.). */ |
| int starting_up; |
| |
| /* If we negotiated packet size explicitly (and thus can bypass |
| heuristics for the largest packet size that will not overflow |
| a buffer in the stub), this will be set to that packet size. |
| Otherwise zero, meaning to use the guessed size. */ |
| long explicit_packet_size; |
| |
| /* remote_wait is normally called when the target is running and |
| waits for a stop reply packet. But sometimes we need to call it |
| when the target is already stopped. We can send a "?" packet |
| and have remote_wait read the response. Or, if we already have |
| the response, we can stash it in BUF and tell remote_wait to |
| skip calling getpkt. This flag is set when BUF contains a |
| stop reply packet and the target is not waiting. */ |
| int cached_wait_status; |
| |
| /* True, if in no ack mode. That is, neither GDB nor the stub will |
| expect acks from each other. The connection is assumed to be |
| reliable. */ |
| int noack_mode; |
| |
| /* True if we're connected in extended remote mode. */ |
| int extended; |
| |
| /* True if we resumed the target and we're waiting for the target to |
| stop. In the mean time, we can't start another command/query. |
| The remote server wouldn't be ready to process it, so we'd |
| timeout waiting for a reply that would never come and eventually |
| we'd close the connection. This can happen in asynchronous mode |
| because we allow GDB commands while the target is running. */ |
| int waiting_for_stop_reply; |
| |
| /* The status of the stub support for the various vCont actions. */ |
| struct vCont_action_support supports_vCont; |
| |
| /* Nonzero if the user has pressed Ctrl-C, but the target hasn't |
| responded to that. */ |
| int ctrlc_pending_p; |
| |
| /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
| remote_open knows that we don't have a file open when the program |
| starts. */ |
| struct serial *remote_desc; |
| |
| /* These are the threads which we last sent to the remote system. The |
| TID member will be -1 for all or -2 for not sent yet. */ |
| ptid_t general_thread; |
| ptid_t continue_thread; |
| |
| /* This is the traceframe which we last selected on the remote system. |
| It will be -1 if no traceframe is selected. */ |
| int remote_traceframe_number; |
| |
| char *last_pass_packet; |
| |
| /* The last QProgramSignals packet sent to the target. We bypass |
| sending a new program signals list down to the target if the new |
| packet is exactly the same as the last we sent. IOW, we only let |
| the target know about program signals list changes. */ |
| char *last_program_signals_packet; |
| |
| enum gdb_signal last_sent_signal; |
| |
| int last_sent_step; |
| |
| char *finished_object; |
| char *finished_annex; |
| ULONGEST finished_offset; |
| |
| /* Should we try the 'ThreadInfo' query packet? |
| |
| This variable (NOT available to the user: auto-detect only!) |
| determines whether GDB will use the new, simpler "ThreadInfo" |
| query or the older, more complex syntax for thread queries. |
| This is an auto-detect variable (set to true at each connect, |
| and set to false when the target fails to recognize it). */ |
| int use_threadinfo_query; |
| int use_threadextra_query; |
| |
| threadref echo_nextthread; |
| threadref nextthread; |
| threadref resultthreadlist[MAXTHREADLISTRESULTS]; |
| |
| /* The state of remote notification. */ |
| struct remote_notif_state *notif_state; |
| |
| /* The branch trace configuration. */ |
| struct btrace_config btrace_config; |
| |
| /* The argument to the last "vFile:setfs:" packet we sent, used |
| to avoid sending repeated unnecessary "vFile:setfs:" packets. |
| Initialized to -1 to indicate that no "vFile:setfs:" packet |
| has yet been sent. */ |
| int fs_pid; |
| |
| /* A readahead cache for vFile:pread. Often, reading a binary |
| involves a sequence of small reads. E.g., when parsing an ELF |
| file. A readahead cache helps mostly the case of remote |
| debugging on a connection with higher latency, due to the |
| request/reply nature of the RSP. We only cache data for a single |
| file descriptor at a time. */ |
| struct readahead_cache readahead_cache; |
| }; |
| |
| /* Private data that we'll store in (struct thread_info)->private. */ |
| struct private_thread_info |
| { |
| char *extra; |
| char *name; |
| int core; |
| |
| /* Whether the target stopped for a breakpoint/watchpoint. */ |
| enum target_stop_reason stop_reason; |
| |
| /* This is set to the data address of the access causing the target |
| to stop for a watchpoint. */ |
| CORE_ADDR watch_data_address; |
| }; |
| |
| static void |
| free_private_thread_info (struct private_thread_info *info) |
| { |
| xfree (info->extra); |
| xfree (info->name); |
| xfree (info); |
| } |
| |
| /* This data could be associated with a target, but we do not always |
| have access to the current target when we need it, so for now it is |
| static. This will be fine for as long as only one target is in use |
| at a time. */ |
| static struct remote_state *remote_state; |
| |
| static struct remote_state * |
| get_remote_state_raw (void) |
| { |
| return remote_state; |
| } |
| |
| /* Allocate a new struct remote_state with xmalloc, initialize it, and |
| return it. */ |
| |
| static struct remote_state * |
| new_remote_state (void) |
| { |
| struct remote_state *result = XCNEW (struct remote_state); |
| |
| /* The default buffer size is unimportant; it will be expanded |
| whenever a larger buffer is needed. */ |
| result->buf_size = 400; |
| result->buf = (char *) xmalloc (result->buf_size); |
| result->remote_traceframe_number = -1; |
| result->last_sent_signal = GDB_SIGNAL_0; |
| result->fs_pid = -1; |
| |
| return result; |
| } |
| |
| /* Description of the remote protocol for a given architecture. */ |
| |
| struct packet_reg |
| { |
| long offset; /* Offset into G packet. */ |
| long regnum; /* GDB's internal register number. */ |
| LONGEST pnum; /* Remote protocol register number. */ |
| int in_g_packet; /* Always part of G packet. */ |
| /* long size in bytes; == register_size (target_gdbarch (), regnum); |
| at present. */ |
| /* char *name; == gdbarch_register_name (target_gdbarch (), regnum); |
| at present. */ |
| }; |
| |
| struct remote_arch_state |
| { |
| /* Description of the remote protocol registers. */ |
| long sizeof_g_packet; |
| |
| /* Description of the remote protocol registers indexed by REGNUM |
| (making an array gdbarch_num_regs in size). */ |
| struct packet_reg *regs; |
| |
| /* This is the size (in chars) of the first response to the ``g'' |
| packet. It is used as a heuristic when determining the maximum |
| size of memory-read and memory-write packets. A target will |
| typically only reserve a buffer large enough to hold the ``g'' |
| packet. The size does not include packet overhead (headers and |
| trailers). */ |
| long actual_register_packet_size; |
| |
| /* This is the maximum size (in chars) of a non read/write packet. |
| It is also used as a cap on the size of read/write packets. */ |
| long remote_packet_size; |
| }; |
| |
| /* Utility: generate error from an incoming stub packet. */ |
| static void |
| trace_error (char *buf) |
| { |
| if (*buf++ != 'E') |
| return; /* not an error msg */ |
| switch (*buf) |
| { |
| case '1': /* malformed packet error */ |
| if (*++buf == '0') /* general case: */ |
| error (_("remote.c: error in outgoing packet.")); |
| else |
| error (_("remote.c: error in outgoing packet at field #%ld."), |
| strtol (buf, NULL, 16)); |
| default: |
| error (_("Target returns error code '%s'."), buf); |
| } |
| } |
| |
| /* Utility: wait for reply from stub, while accepting "O" packets. */ |
| static char * |
| remote_get_noisy_reply (char **buf_p, |
| long *sizeof_buf) |
| { |
| do /* Loop on reply from remote stub. */ |
| { |
| char *buf; |
| |
| QUIT; /* Allow user to bail out with ^C. */ |
| getpkt (buf_p, sizeof_buf, 0); |
| buf = *buf_p; |
| if (buf[0] == 'E') |
| trace_error (buf); |
| else if (startswith (buf, "qRelocInsn:")) |
| { |
| ULONGEST ul; |
| CORE_ADDR from, to, org_to; |
| char *p, *pp; |
| int adjusted_size = 0; |
| int relocated = 0; |
| |
| p = buf + strlen ("qRelocInsn:"); |
| pp = unpack_varlen_hex (p, &ul); |
| if (*pp != ';') |
| error (_("invalid qRelocInsn packet: %s"), buf); |
| from = ul; |
| |
| p = pp + 1; |
| unpack_varlen_hex (p, &ul); |
| to = ul; |
| |
| org_to = to; |
| |
| TRY |
| { |
| gdbarch_relocate_instruction (target_gdbarch (), &to, from); |
| relocated = 1; |
| } |
| CATCH (ex, RETURN_MASK_ALL) |
| { |
| if (ex.error == MEMORY_ERROR) |
| { |
| /* Propagate memory errors silently back to the |
| target. The stub may have limited the range of |
| addresses we can write to, for example. */ |
| } |
| else |
| { |
| /* Something unexpectedly bad happened. Be verbose |
| so we can tell what, and propagate the error back |
| to the stub, so it doesn't get stuck waiting for |
| a response. */ |
| exception_fprintf (gdb_stderr, ex, |
| _("warning: relocating instruction: ")); |
| } |
| putpkt ("E01"); |
| } |
| END_CATCH |
| |
| if (relocated) |
| { |
| adjusted_size = to - org_to; |
| |
| xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size); |
| putpkt (buf); |
| } |
| } |
| else if (buf[0] == 'O' && buf[1] != 'K') |
| remote_console_output (buf + 1); /* 'O' message from stub */ |
| else |
| return buf; /* Here's the actual reply. */ |
| } |
| while (1); |
| } |
| |
| /* Handle for retreving the remote protocol data from gdbarch. */ |
| static struct gdbarch_data *remote_gdbarch_data_handle; |
| |
| static struct remote_arch_state * |
| get_remote_arch_state (void) |
| { |
| gdb_assert (target_gdbarch () != NULL); |
| return ((struct remote_arch_state *) |
| gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle)); |
| } |
| |
| /* Fetch the global remote target state. */ |
| |
| static struct remote_state * |
| get_remote_state (void) |
| { |
| /* Make sure that the remote architecture state has been |
| initialized, because doing so might reallocate rs->buf. Any |
| function which calls getpkt also needs to be mindful of changes |
| to rs->buf, but this call limits the number of places which run |
| into trouble. */ |
| get_remote_arch_state (); |
| |
| return get_remote_state_raw (); |
| } |
| |
| /* Cleanup routine for the remote module's pspace data. */ |
| |
| static void |
| remote_pspace_data_cleanup (struct program_space *pspace, void *arg) |
| { |
| char *remote_exec_file = (char *) arg; |
| |
| xfree (remote_exec_file); |
| } |
| |
| /* Fetch the remote exec-file from the current program space. */ |
| |
| static const char * |
| get_remote_exec_file (void) |
| { |
| char *remote_exec_file; |
| |
| remote_exec_file |
| = (char *) program_space_data (current_program_space, |
| remote_pspace_data); |
| if (remote_exec_file == NULL) |
| return ""; |
| |
| return remote_exec_file; |
| } |
| |
| /* Set the remote exec file for PSPACE. */ |
| |
| static void |
| set_pspace_remote_exec_file (struct program_space *pspace, |
| char *remote_exec_file) |
| { |
| char *old_file = (char *) program_space_data (pspace, remote_pspace_data); |
| |
| xfree (old_file); |
| set_program_space_data (pspace, remote_pspace_data, |
| xstrdup (remote_exec_file)); |
| } |
| |
| /* The "set/show remote exec-file" set command hook. */ |
| |
| static void |
| set_remote_exec_file (char *ignored, int from_tty, |
| struct cmd_list_element *c) |
| { |
| gdb_assert (remote_exec_file_var != NULL); |
| set_pspace_remote_exec_file (current_program_space, remote_exec_file_var); |
| } |
| |
| /* The "set/show remote exec-file" show command hook. */ |
| |
| static void |
| show_remote_exec_file (struct ui_file *file, int from_tty, |
| struct cmd_list_element *cmd, const char *value) |
| { |
| fprintf_filtered (file, "%s\n", remote_exec_file_var); |
| } |
| |
| static int |
| compare_pnums (const void *lhs_, const void *rhs_) |
| { |
| const struct packet_reg * const *lhs |
| = (const struct packet_reg * const *) lhs_; |
| const struct packet_reg * const *rhs |
| = (const struct packet_reg * const *) rhs_; |
| |
| if ((*lhs)->pnum < (*rhs)->pnum) |
| return -1; |
| else if ((*lhs)->pnum == (*rhs)->pnum) |
| return 0; |
| else |
| return 1; |
| } |
| |
| static int |
| map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs) |
| { |
| int regnum, num_remote_regs, offset; |
| struct packet_reg **remote_regs; |
| |
| for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) |
| { |
| struct packet_reg *r = ®s[regnum]; |
| |
| if (register_size (gdbarch, regnum) == 0) |
| /* Do not try to fetch zero-sized (placeholder) registers. */ |
| r->pnum = -1; |
| else |
| r->pnum = gdbarch_remote_register_number (gdbarch, regnum); |
| |
| r->regnum = regnum; |
| } |
| |
| /* Define the g/G packet format as the contents of each register |
| with a remote protocol number, in order of ascending protocol |
| number. */ |
| |
| remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch)); |
| for (num_remote_regs = 0, regnum = 0; |
| regnum < gdbarch_num_regs (gdbarch); |
| regnum++) |
| if (regs[regnum].pnum != -1) |
| remote_regs[num_remote_regs++] = ®s[regnum]; |
| |
| qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *), |
| compare_pnums); |
| |
| for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++) |
| { |
| remote_regs[regnum]->in_g_packet = 1; |
| remote_regs[regnum]->offset = offset; |
| offset += register_size (gdbarch, remote_regs[regnum]->regnum); |
| } |
| |
| return offset; |
| } |
| |
| /* Given the architecture described by GDBARCH, return the remote |
| protocol register's number and the register's offset in the g/G |
| packets of GDB register REGNUM, in PNUM and POFFSET respectively. |
| If the target does not have a mapping for REGNUM, return false, |
| otherwise, return true. */ |
| |
| int |
| remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum, |
| int *pnum, int *poffset) |
| { |
| struct packet_reg *regs; |
| struct cleanup *old_chain; |
| |
| gdb_assert (regnum < gdbarch_num_regs (gdbarch)); |
| |
| regs = XCNEWVEC (struct packet_reg, gdbarch_num_regs (gdbarch)); |
| old_chain = make_cleanup (xfree, regs); |
| |
| map_regcache_remote_table (gdbarch, regs); |
| |
| *pnum = regs[regnum].pnum; |
| *poffset = regs[regnum].offset; |
| |
| do_cleanups (old_chain); |
| |
| return *pnum != -1; |
| } |
| |
| static void * |
| init_remote_state (struct gdbarch *gdbarch) |
| { |
| struct remote_state *rs = get_remote_state_raw (); |
| struct remote_arch_state *rsa; |
| |
| rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state); |
| |
| /* Use the architecture to build a regnum<->pnum table, which will be |
| 1:1 unless a feature set specifies otherwise. */ |
| rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, |
| gdbarch_num_regs (gdbarch), |
| struct packet_reg); |
| |
| /* Record the maximum possible size of the g packet - it may turn out |
| to be smaller. */ |
| rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs); |
| |
| /* Default maximum number of characters in a packet body. Many |
| remote stubs have a hardwired buffer size of 400 bytes |
| (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used |
| as the maximum packet-size to ensure that the packet and an extra |
| NUL character can always fit in the buffer. This stops GDB |
| trashing stubs that try to squeeze an extra NUL into what is |
| already a full buffer (As of 1999-12-04 that was most stubs). */ |
| rsa->remote_packet_size = 400 - 1; |
| |
| /* This one is filled in when a ``g'' packet is received. */ |
| rsa->actual_register_packet_size = 0; |
| |
| /* Should rsa->sizeof_g_packet needs more space than the |
| default, adjust the size accordingly. Remember that each byte is |
| encoded as two characters. 32 is the overhead for the packet |
| header / footer. NOTE: cagney/1999-10-26: I suspect that 8 |
| (``$NN:G...#NN'') is a better guess, the below has been padded a |
| little. */ |
| if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2)) |
| rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32); |
| |
| /* Make sure that the packet buffer is plenty big enough for |
| this architecture. */ |
| if (rs->buf_size < rsa->remote_packet_size) |
| { |
| rs->buf_size = 2 * rsa->remote_packet_size; |
| rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); |
| } |
| |
| return rsa; |
| } |
| |
| /* Return the current allowed size of a remote packet. This is |
| inferred from the current architecture, and should be used to |
| limit the length of outgoing packets. */ |
| static long |
| get_remote_packet_size (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| |
| if (rs->explicit_packet_size) |
| return rs->explicit_packet_size; |
| |
| return rsa->remote_packet_size; |
| } |
| |
| static struct packet_reg * |
| packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum) |
| { |
| if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ())) |
| return NULL; |
| else |
| { |
| struct packet_reg *r = &rsa->regs[regnum]; |
| |
| gdb_assert (r->regnum == regnum); |
| return r; |
| } |
| } |
| |
| static struct packet_reg * |
| packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum) |
| { |
| int i; |
| |
| for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++) |
| { |
| struct packet_reg *r = &rsa->regs[i]; |
| |
| if (r->pnum == pnum) |
| return r; |
| } |
| return NULL; |
| } |
| |
| static struct target_ops remote_ops; |
| |
| static struct target_ops extended_remote_ops; |
| |
| /* FIXME: cagney/1999-09-23: Even though getpkt was called with |
| ``forever'' still use the normal timeout mechanism. This is |
| currently used by the ASYNC code to guarentee that target reads |
| during the initial connect always time-out. Once getpkt has been |
| modified to return a timeout indication and, in turn |
| remote_wait()/wait_for_inferior() have gained a timeout parameter |
| this can go away. */ |
| static int wait_forever_enabled_p = 1; |
| |
| /* Allow the user to specify what sequence to send to the remote |
| when he requests a program interruption: Although ^C is usually |
| what remote systems expect (this is the default, here), it is |
| sometimes preferable to send a break. On other systems such |
| as the Linux kernel, a break followed by g, which is Magic SysRq g |
| is required in order to interrupt the execution. */ |
| const char interrupt_sequence_control_c[] = "Ctrl-C"; |
| const char interrupt_sequence_break[] = "BREAK"; |
| const char interrupt_sequence_break_g[] = "BREAK-g"; |
| static const char *const interrupt_sequence_modes[] = |
| { |
| interrupt_sequence_control_c, |
| interrupt_sequence_break, |
| interrupt_sequence_break_g, |
| NULL |
| }; |
| static const char *interrupt_sequence_mode = interrupt_sequence_control_c; |
| |
| static void |
| show_interrupt_sequence (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| if (interrupt_sequence_mode == interrupt_sequence_control_c) |
| fprintf_filtered (file, |
| _("Send the ASCII ETX character (Ctrl-c) " |
| "to the remote target to interrupt the " |
| "execution of the program.\n")); |
| else if (interrupt_sequence_mode == interrupt_sequence_break) |
| fprintf_filtered (file, |
| _("send a break signal to the remote target " |
| "to interrupt the execution of the program.\n")); |
| else if (interrupt_sequence_mode == interrupt_sequence_break_g) |
| fprintf_filtered (file, |
| _("Send a break signal and 'g' a.k.a. Magic SysRq g to " |
| "the remote target to interrupt the execution " |
| "of Linux kernel.\n")); |
| else |
| internal_error (__FILE__, __LINE__, |
| _("Invalid value for interrupt_sequence_mode: %s."), |
| interrupt_sequence_mode); |
| } |
| |
| /* This boolean variable specifies whether interrupt_sequence is sent |
| to the remote target when gdb connects to it. |
| This is mostly needed when you debug the Linux kernel: The Linux kernel |
| expects BREAK g which is Magic SysRq g for connecting gdb. */ |
| static int interrupt_on_connect = 0; |
| |
| /* This variable is used to implement the "set/show remotebreak" commands. |
| Since these commands are now deprecated in favor of "set/show remote |
| interrupt-sequence", it no longer has any effect on the code. */ |
| static int remote_break; |
| |
| static void |
| set_remotebreak (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| if (remote_break) |
| interrupt_sequence_mode = interrupt_sequence_break; |
| else |
| interrupt_sequence_mode = interrupt_sequence_control_c; |
| } |
| |
| static void |
| show_remotebreak (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| } |
| |
| /* This variable sets the number of bits in an address that are to be |
| sent in a memory ("M" or "m") packet. Normally, after stripping |
| leading zeros, the entire address would be sent. This variable |
| restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The |
| initial implementation of remote.c restricted the address sent in |
| memory packets to ``host::sizeof long'' bytes - (typically 32 |
| bits). Consequently, for 64 bit targets, the upper 32 bits of an |
| address was never sent. Since fixing this bug may cause a break in |
| some remote targets this variable is principly provided to |
| facilitate backward compatibility. */ |
| |
| static unsigned int remote_address_size; |
| |
| /* Temporary to track who currently owns the terminal. See |
| remote_terminal_* for more details. */ |
| |
| static int remote_async_terminal_ours_p; |
| |
| |
| /* User configurable variables for the number of characters in a |
| memory read/write packet. MIN (rsa->remote_packet_size, |
| rsa->sizeof_g_packet) is the default. Some targets need smaller |
| values (fifo overruns, et.al.) and some users need larger values |
| (speed up transfers). The variables ``preferred_*'' (the user |
| request), ``current_*'' (what was actually set) and ``forced_*'' |
| (Positive - a soft limit, negative - a hard limit). */ |
| |
| struct memory_packet_config |
| { |
| char *name; |
| long size; |
| int fixed_p; |
| }; |
| |
| /* The default max memory-write-packet-size. The 16k is historical. |
| (It came from older GDB's using alloca for buffers and the |
| knowledge (folklore?) that some hosts don't cope very well with |
| large alloca calls.) */ |
| #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384 |
| |
| /* The minimum remote packet size for memory transfers. Ensures we |
| can write at least one byte. */ |
| #define MIN_MEMORY_PACKET_SIZE 20 |
| |
| /* Compute the current size of a read/write packet. Since this makes |
| use of ``actual_register_packet_size'' the computation is dynamic. */ |
| |
| static long |
| get_memory_packet_size (struct memory_packet_config *config) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| |
| long what_they_get; |
| if (config->fixed_p) |
| { |
| if (config->size <= 0) |
| what_they_get = DEFAULT_MAX_MEMORY_PACKET_SIZE; |
| else |
| what_they_get = config->size; |
| } |
| else |
| { |
| what_they_get = get_remote_packet_size (); |
| /* Limit the packet to the size specified by the user. */ |
| if (config->size > 0 |
| && what_they_get > config->size) |
| what_they_get = config->size; |
| |
| /* Limit it to the size of the targets ``g'' response unless we have |
| permission from the stub to use a larger packet size. */ |
| if (rs->explicit_packet_size == 0 |
| && rsa->actual_register_packet_size > 0 |
| && what_they_get > rsa->actual_register_packet_size) |
| what_they_get = rsa->actual_register_packet_size; |
| } |
| if (what_they_get < MIN_MEMORY_PACKET_SIZE) |
| what_they_get = MIN_MEMORY_PACKET_SIZE; |
| |
| /* Make sure there is room in the global buffer for this packet |
| (including its trailing NUL byte). */ |
| if (rs->buf_size < what_they_get + 1) |
| { |
| rs->buf_size = 2 * what_they_get; |
| rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get); |
| } |
| |
| return what_they_get; |
| } |
| |
| /* Update the size of a read/write packet. If they user wants |
| something really big then do a sanity check. */ |
| |
| static void |
| set_memory_packet_size (char *args, struct memory_packet_config *config) |
| { |
| int fixed_p = config->fixed_p; |
| long size = config->size; |
| |
| if (args == NULL) |
| error (_("Argument required (integer, `fixed' or `limited').")); |
| else if (strcmp (args, "hard") == 0 |
| || strcmp (args, "fixed") == 0) |
| fixed_p = 1; |
| else if (strcmp (args, "soft") == 0 |
| || strcmp (args, "limit") == 0) |
| fixed_p = 0; |
| else |
| { |
| char *end; |
| |
| size = strtoul (args, &end, 0); |
| if (args == end) |
| error (_("Invalid %s (bad syntax)."), config->name); |
| |
| /* Instead of explicitly capping the size of a packet to or |
| disallowing it, the user is allowed to set the size to |
| something arbitrarily large. */ |
| } |
| |
| /* So that the query shows the correct value. */ |
| if (size <= 0) |
| size = DEFAULT_MAX_MEMORY_PACKET_SIZE; |
| |
| /* Extra checks? */ |
| if (fixed_p && !config->fixed_p) |
| { |
| if (! query (_("The target may not be able to correctly handle a %s\n" |
| "of %ld bytes. Change the packet size? "), |
| config->name, size)) |
| error (_("Packet size not changed.")); |
| } |
| /* Update the config. */ |
| config->fixed_p = fixed_p; |
| config->size = size; |
| } |
| |
| static void |
| show_memory_packet_size (struct memory_packet_config *config) |
| { |
| printf_filtered (_("The %s is %ld. "), config->name, config->size); |
| if (config->fixed_p) |
| printf_filtered (_("Packets are fixed at %ld bytes.\n"), |
| get_memory_packet_size (config)); |
| else |
| printf_filtered (_("Packets are limited to %ld bytes.\n"), |
| get_memory_packet_size (config)); |
| } |
| |
| static struct memory_packet_config memory_write_packet_config = |
| { |
| "memory-write-packet-size", |
| }; |
| |
| static void |
| set_memory_write_packet_size (char *args, int from_tty) |
| { |
| set_memory_packet_size (args, &memory_write_packet_config); |
| } |
| |
| static void |
| show_memory_write_packet_size (char *args, int from_tty) |
| { |
| show_memory_packet_size (&memory_write_packet_config); |
| } |
| |
| static long |
| get_memory_write_packet_size (void) |
| { |
| return get_memory_packet_size (&memory_write_packet_config); |
| } |
| |
| static struct memory_packet_config memory_read_packet_config = |
| { |
| "memory-read-packet-size", |
| }; |
| |
| static void |
| set_memory_read_packet_size (char *args, int from_tty) |
| { |
| set_memory_packet_size (args, &memory_read_packet_config); |
| } |
| |
| static void |
| show_memory_read_packet_size (char *args, int from_tty) |
| { |
| show_memory_packet_size (&memory_read_packet_config); |
| } |
| |
| static long |
| get_memory_read_packet_size (void) |
| { |
| long size = get_memory_packet_size (&memory_read_packet_config); |
| |
| /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an |
| extra buffer size argument before the memory read size can be |
| increased beyond this. */ |
| if (size > get_remote_packet_size ()) |
| size = get_remote_packet_size (); |
| return size; |
| } |
| |
| |
| /* Generic configuration support for packets the stub optionally |
| supports. Allows the user to specify the use of the packet as well |
| as allowing GDB to auto-detect support in the remote stub. */ |
| |
| enum packet_support |
| { |
| PACKET_SUPPORT_UNKNOWN = 0, |
| PACKET_ENABLE, |
| PACKET_DISABLE |
| }; |
| |
| struct packet_config |
| { |
| const char *name; |
| const char *title; |
| |
| /* If auto, GDB auto-detects support for this packet or feature, |
| either through qSupported, or by trying the packet and looking |
| at the response. If true, GDB assumes the target supports this |
| packet. If false, the packet is disabled. Configs that don't |
| have an associated command always have this set to auto. */ |
| enum auto_boolean detect; |
| |
| /* Does the target support this packet? */ |
| enum packet_support support; |
| }; |
| |
| /* Analyze a packet's return value and update the packet config |
| accordingly. */ |
| |
| enum packet_result |
| { |
| PACKET_ERROR, |
| PACKET_OK, |
| PACKET_UNKNOWN |
| }; |
| |
| static enum packet_support packet_config_support (struct packet_config *config); |
| static enum packet_support packet_support (int packet); |
| |
| static void |
| show_packet_config_cmd (struct packet_config *config) |
| { |
| char *support = "internal-error"; |
| |
| switch (packet_config_support (config)) |
| { |
| case PACKET_ENABLE: |
| support = "enabled"; |
| break; |
| case PACKET_DISABLE: |
| support = "disabled"; |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| support = "unknown"; |
| break; |
| } |
| switch (config->detect) |
| { |
| case AUTO_BOOLEAN_AUTO: |
| printf_filtered (_("Support for the `%s' packet " |
| "is auto-detected, currently %s.\n"), |
| config->name, support); |
| break; |
| case AUTO_BOOLEAN_TRUE: |
| case AUTO_BOOLEAN_FALSE: |
| printf_filtered (_("Support for the `%s' packet is currently %s.\n"), |
| config->name, support); |
| break; |
| } |
| } |
| |
| static void |
| add_packet_config_cmd (struct packet_config *config, const char *name, |
| const char *title, int legacy) |
| { |
| char *set_doc; |
| char *show_doc; |
| char *cmd_name; |
| |
| config->name = name; |
| config->title = title; |
| set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", |
| name, title); |
| show_doc = xstrprintf ("Show current use of remote " |
| "protocol `%s' (%s) packet", |
| name, title); |
| /* set/show TITLE-packet {auto,on,off} */ |
| cmd_name = xstrprintf ("%s-packet", title); |
| add_setshow_auto_boolean_cmd (cmd_name, class_obscure, |
| &config->detect, set_doc, |
| show_doc, NULL, /* help_doc */ |
| NULL, |
| show_remote_protocol_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| /* The command code copies the documentation strings. */ |
| xfree (set_doc); |
| xfree (show_doc); |
| /* set/show remote NAME-packet {auto,on,off} -- legacy. */ |
| if (legacy) |
| { |
| char *legacy_name; |
| |
| legacy_name = xstrprintf ("%s-packet", name); |
| add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| &remote_set_cmdlist); |
| add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| &remote_show_cmdlist); |
| } |
| } |
| |
| static enum packet_result |
| packet_check_result (const char *buf) |
| { |
| if (buf[0] != '\0') |
| { |
| /* The stub recognized the packet request. Check that the |
| operation succeeded. */ |
| if (buf[0] == 'E' |
| && isxdigit (buf[1]) && isxdigit (buf[2]) |
| && buf[3] == '\0') |
| /* "Enn" - definitly an error. */ |
| return PACKET_ERROR; |
| |
| /* Always treat "E." as an error. This will be used for |
| more verbose error messages, such as E.memtypes. */ |
| if (buf[0] == 'E' && buf[1] == '.') |
| return PACKET_ERROR; |
| |
| /* The packet may or may not be OK. Just assume it is. */ |
| return PACKET_OK; |
| } |
| else |
| /* The stub does not support the packet. */ |
| return PACKET_UNKNOWN; |
| } |
| |
| static enum packet_result |
| packet_ok (const char *buf, struct packet_config *config) |
| { |
| enum packet_result result; |
| |
| if (config->detect != AUTO_BOOLEAN_TRUE |
| && config->support == PACKET_DISABLE) |
| internal_error (__FILE__, __LINE__, |
| _("packet_ok: attempt to use a disabled packet")); |
| |
| result = packet_check_result (buf); |
| switch (result) |
| { |
| case PACKET_OK: |
| case PACKET_ERROR: |
| /* The stub recognized the packet request. */ |
| if (config->support == PACKET_SUPPORT_UNKNOWN) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Packet %s (%s) is supported\n", |
| config->name, config->title); |
| config->support = PACKET_ENABLE; |
| } |
| break; |
| case PACKET_UNKNOWN: |
| /* The stub does not support the packet. */ |
| if (config->detect == AUTO_BOOLEAN_AUTO |
| && config->support == PACKET_ENABLE) |
| { |
| /* If the stub previously indicated that the packet was |
| supported then there is a protocol error. */ |
| error (_("Protocol error: %s (%s) conflicting enabled responses."), |
| config->name, config->title); |
| } |
| else if (config->detect == AUTO_BOOLEAN_TRUE) |
| { |
| /* The user set it wrong. */ |
| error (_("Enabled packet %s (%s) not recognized by stub"), |
| config->name, config->title); |
| } |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Packet %s (%s) is NOT supported\n", |
| config->name, config->title); |
| config->support = PACKET_DISABLE; |
| break; |
| } |
| |
| return result; |
| } |
| |
| enum { |
| PACKET_vCont = 0, |
| PACKET_X, |
| PACKET_qSymbol, |
| PACKET_P, |
| PACKET_p, |
| PACKET_Z0, |
| PACKET_Z1, |
| PACKET_Z2, |
| PACKET_Z3, |
| PACKET_Z4, |
| PACKET_vFile_setfs, |
| PACKET_vFile_open, |
| PACKET_vFile_pread, |
| PACKET_vFile_pwrite, |
| PACKET_vFile_close, |
| PACKET_vFile_unlink, |
| PACKET_vFile_readlink, |
| PACKET_vFile_fstat, |
| PACKET_qXfer_auxv, |
| PACKET_qXfer_features, |
| PACKET_qXfer_exec_file, |
| PACKET_qXfer_libraries, |
| PACKET_qXfer_libraries_svr4, |
| PACKET_qXfer_memory_map, |
| PACKET_qXfer_spu_read, |
| PACKET_qXfer_spu_write, |
| PACKET_qXfer_osdata, |
| PACKET_qXfer_threads, |
| PACKET_qXfer_statictrace_read, |
| PACKET_qXfer_traceframe_info, |
| PACKET_qXfer_uib, |
| PACKET_qGetTIBAddr, |
| PACKET_qGetTLSAddr, |
| PACKET_qSupported, |
| PACKET_qTStatus, |
| PACKET_QPassSignals, |
| PACKET_QCatchSyscalls, |
| PACKET_QProgramSignals, |
| PACKET_qCRC, |
| PACKET_qSearch_memory, |
| PACKET_vAttach, |
| PACKET_vRun, |
| PACKET_QStartNoAckMode, |
| PACKET_vKill, |
| PACKET_qXfer_siginfo_read, |
| PACKET_qXfer_siginfo_write, |
| PACKET_qAttached, |
| |
| /* Support for conditional tracepoints. */ |
| PACKET_ConditionalTracepoints, |
| |
| /* Support for target-side breakpoint conditions. */ |
| PACKET_ConditionalBreakpoints, |
| |
| /* Support for target-side breakpoint commands. */ |
| PACKET_BreakpointCommands, |
| |
| /* Support for fast tracepoints. */ |
| PACKET_FastTracepoints, |
| |
| /* Support for static tracepoints. */ |
| PACKET_StaticTracepoints, |
| |
| /* Support for installing tracepoints while a trace experiment is |
| running. */ |
| PACKET_InstallInTrace, |
| |
| PACKET_bc, |
| PACKET_bs, |
| PACKET_TracepointSource, |
| PACKET_QAllow, |
| PACKET_qXfer_fdpic, |
| PACKET_QDisableRandomization, |
| PACKET_QAgent, |
| PACKET_QTBuffer_size, |
| PACKET_Qbtrace_off, |
| PACKET_Qbtrace_bts, |
| PACKET_Qbtrace_pt, |
| PACKET_qXfer_btrace, |
| |
| /* Support for the QNonStop packet. */ |
| PACKET_QNonStop, |
| |
| /* Support for the QThreadEvents packet. */ |
| PACKET_QThreadEvents, |
| |
| /* Support for multi-process extensions. */ |
| PACKET_multiprocess_feature, |
| |
| /* Support for enabling and disabling tracepoints while a trace |
| experiment is running. */ |
| PACKET_EnableDisableTracepoints_feature, |
| |
| /* Support for collecting strings using the tracenz bytecode. */ |
| PACKET_tracenz_feature, |
| |
| /* Support for continuing to run a trace experiment while GDB is |
| disconnected. */ |
| PACKET_DisconnectedTracing_feature, |
| |
| /* Support for qXfer:libraries-svr4:read with a non-empty annex. */ |
| PACKET_augmented_libraries_svr4_read_feature, |
| |
| /* Support for the qXfer:btrace-conf:read packet. */ |
| PACKET_qXfer_btrace_conf, |
| |
| /* Support for the Qbtrace-conf:bts:size packet. */ |
| PACKET_Qbtrace_conf_bts_size, |
| |
| /* Support for swbreak+ feature. */ |
| PACKET_swbreak_feature, |
| |
| /* Support for hwbreak+ feature. */ |
| PACKET_hwbreak_feature, |
| |
| /* Support for fork events. */ |
| PACKET_fork_event_feature, |
| |
| /* Support for vfork events. */ |
| PACKET_vfork_event_feature, |
| |
| /* Support for the Qbtrace-conf:pt:size packet. */ |
| PACKET_Qbtrace_conf_pt_size, |
| |
| /* Support for exec events. */ |
| PACKET_exec_event_feature, |
| |
| /* Support for query supported vCont actions. */ |
| PACKET_vContSupported, |
| |
| /* Support remote CTRL-C. */ |
| PACKET_vCtrlC, |
| |
| /* Support TARGET_WAITKIND_NO_RESUMED. */ |
| PACKET_no_resumed, |
| |
| PACKET_MAX |
| }; |
| |
| static struct packet_config remote_protocol_packets[PACKET_MAX]; |
| |
| /* Returns the packet's corresponding "set remote foo-packet" command |
| state. See struct packet_config for more details. */ |
| |
| static enum auto_boolean |
| packet_set_cmd_state (int packet) |
| { |
| return remote_protocol_packets[packet].detect; |
| } |
| |
| /* Returns whether a given packet or feature is supported. This takes |
| into account the state of the corresponding "set remote foo-packet" |
| command, which may be used to bypass auto-detection. */ |
| |
| static enum packet_support |
| packet_config_support (struct packet_config *config) |
| { |
| switch (config->detect) |
| { |
| case AUTO_BOOLEAN_TRUE: |
| return PACKET_ENABLE; |
| case AUTO_BOOLEAN_FALSE: |
| return PACKET_DISABLE; |
| case AUTO_BOOLEAN_AUTO: |
| return config->support; |
| default: |
| gdb_assert_not_reached (_("bad switch")); |
| } |
| } |
| |
| /* Same as packet_config_support, but takes the packet's enum value as |
| argument. */ |
| |
| static enum packet_support |
| packet_support (int packet) |
| { |
| struct packet_config *config = &remote_protocol_packets[packet]; |
| |
| return packet_config_support (config); |
| } |
| |
| static void |
| show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| struct packet_config *packet; |
| |
| for (packet = remote_protocol_packets; |
| packet < &remote_protocol_packets[PACKET_MAX]; |
| packet++) |
| { |
| if (&packet->detect == c->var) |
| { |
| show_packet_config_cmd (packet); |
| return; |
| } |
| } |
| internal_error (__FILE__, __LINE__, _("Could not find config for %s"), |
| c->name); |
| } |
| |
| /* Should we try one of the 'Z' requests? */ |
| |
| enum Z_packet_type |
| { |
| Z_PACKET_SOFTWARE_BP, |
| Z_PACKET_HARDWARE_BP, |
| Z_PACKET_WRITE_WP, |
| Z_PACKET_READ_WP, |
| Z_PACKET_ACCESS_WP, |
| NR_Z_PACKET_TYPES |
| }; |
| |
| /* For compatibility with older distributions. Provide a ``set remote |
| Z-packet ...'' command that updates all the Z packet types. */ |
| |
| static enum auto_boolean remote_Z_packet_detect; |
| |
| static void |
| set_remote_protocol_Z_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| int i; |
| |
| for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect; |
| } |
| |
| static void |
| show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| int i; |
| |
| for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| { |
| show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]); |
| } |
| } |
| |
| /* Returns true if the multi-process extensions are in effect. */ |
| |
| static int |
| remote_multi_process_p (struct remote_state *rs) |
| { |
| return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE; |
| } |
| |
| /* Returns true if fork events are supported. */ |
| |
| static int |
| remote_fork_event_p (struct remote_state *rs) |
| { |
| return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE; |
| } |
| |
| /* Returns true if vfork events are supported. */ |
| |
| static int |
| remote_vfork_event_p (struct remote_state *rs) |
| { |
| return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE; |
| } |
| |
| /* Returns true if exec events are supported. */ |
| |
| static int |
| remote_exec_event_p (struct remote_state *rs) |
| { |
| return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE; |
| } |
| |
| /* Insert fork catchpoint target routine. If fork events are enabled |
| then return success, nothing more to do. */ |
| |
| static int |
| remote_insert_fork_catchpoint (struct target_ops *ops, int pid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| return !remote_fork_event_p (rs); |
| } |
| |
| /* Remove fork catchpoint target routine. Nothing to do, just |
| return success. */ |
| |
| static int |
| remote_remove_fork_catchpoint (struct target_ops *ops, int pid) |
| { |
| return 0; |
| } |
| |
| /* Insert vfork catchpoint target routine. If vfork events are enabled |
| then return success, nothing more to do. */ |
| |
| static int |
| remote_insert_vfork_catchpoint (struct target_ops *ops, int pid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| return !remote_vfork_event_p (rs); |
| } |
| |
| /* Remove vfork catchpoint target routine. Nothing to do, just |
| return success. */ |
| |
| static int |
| remote_remove_vfork_catchpoint (struct target_ops *ops, int pid) |
| { |
| return 0; |
| } |
| |
| /* Insert exec catchpoint target routine. If exec events are |
| enabled, just return success. */ |
| |
| static int |
| remote_insert_exec_catchpoint (struct target_ops *ops, int pid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| return !remote_exec_event_p (rs); |
| } |
| |
| /* Remove exec catchpoint target routine. Nothing to do, just |
| return success. */ |
| |
| static int |
| remote_remove_exec_catchpoint (struct target_ops *ops, int pid) |
| { |
| return 0; |
| } |
| |
| /* Tokens for use by the asynchronous signal handlers for SIGINT. */ |
| static struct async_signal_handler *async_sigint_remote_twice_token; |
| static struct async_signal_handler *async_sigint_remote_token; |
| |
| |
| /* Asynchronous signal handle registered as event loop source for |
| when we have pending events ready to be passed to the core. */ |
| |
| static struct async_event_handler *remote_async_inferior_event_token; |
| |
| |
| |
| static ptid_t magic_null_ptid; |
| static ptid_t not_sent_ptid; |
| static ptid_t any_thread_ptid; |
| |
| /* Find out if the stub attached to PID (and hence GDB should offer to |
| detach instead of killing it when bailing out). */ |
| |
| static int |
| remote_query_attached (int pid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| size_t size = get_remote_packet_size (); |
| |
| if (packet_support (PACKET_qAttached) == PACKET_DISABLE) |
| return 0; |
| |
| if (remote_multi_process_p (rs)) |
| xsnprintf (rs->buf, size, "qAttached:%x", pid); |
| else |
| xsnprintf (rs->buf, size, "qAttached"); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_qAttached])) |
| { |
| case PACKET_OK: |
| if (strcmp (rs->buf, "1") == 0) |
| return 1; |
| break; |
| case PACKET_ERROR: |
| warning (_("Remote failure reply: %s"), rs->buf); |
| break; |
| case PACKET_UNKNOWN: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID |
| has been invented by GDB, instead of reported by the target. Since |
| we can be connected to a remote system before before knowing about |
| any inferior, mark the target with execution when we find the first |
| inferior. If ATTACHED is 1, then we had just attached to this |
| inferior. If it is 0, then we just created this inferior. If it |
| is -1, then try querying the remote stub to find out if it had |
| attached to the inferior or not. If TRY_OPEN_EXEC is true then |
| attempt to open this inferior's executable as the main executable |
| if no main executable is open already. */ |
| |
| static struct inferior * |
| remote_add_inferior (int fake_pid_p, int pid, int attached, |
| int try_open_exec) |
| { |
| struct inferior *inf; |
| |
| /* Check whether this process we're learning about is to be |
| considered attached, or if is to be considered to have been |
| spawned by the stub. */ |
| if (attached == -1) |
| attached = remote_query_attached (pid); |
| |
| if (gdbarch_has_global_solist (target_gdbarch ())) |
| { |
| /* If the target shares code across all inferiors, then every |
| attach adds a new inferior. */ |
| inf = add_inferior (pid); |
| |
| /* ... and every inferior is bound to the same program space. |
| However, each inferior may still have its own address |
| space. */ |
| inf->aspace = maybe_new_address_space (); |
| inf->pspace = current_program_space; |
| } |
| else |
| { |
| /* In the traditional debugging scenario, there's a 1-1 match |
| between program/address spaces. We simply bind the inferior |
| to the program space's address space. */ |
| inf = current_inferior (); |
| inferior_appeared (inf, pid); |
| } |
| |
| inf->attach_flag = attached; |
| inf->fake_pid_p = fake_pid_p; |
| |
| /* If no main executable is currently open then attempt to |
| open the file that was executed to create this inferior. */ |
| if (try_open_exec && get_exec_file (0) == NULL) |
| exec_file_locate_attach (pid, 1); |
| |
| return inf; |
| } |
| |
| /* Add thread PTID to GDB's thread list. Tag it as executing/running |
| according to RUNNING. */ |
| |
| static void |
| remote_add_thread (ptid_t ptid, int running) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* GDB historically didn't pull threads in the initial connection |
| setup. If the remote target doesn't even have a concept of |
| threads (e.g., a bare-metal target), even if internally we |
| consider that a single-threaded target, mentioning a new thread |
| might be confusing to the user. Be silent then, preserving the |
| age old behavior. */ |
| if (rs->starting_up) |
| add_thread_silent (ptid); |
| else |
| add_thread (ptid); |
| |
| set_executing (ptid, running); |
| set_running (ptid, running); |
| } |
| |
| /* Come here when we learn about a thread id from the remote target. |
| It may be the first time we hear about such thread, so take the |
| opportunity to add it to GDB's thread list. In case this is the |
| first time we're noticing its corresponding inferior, add it to |
| GDB's inferior list as well. */ |
| |
| static void |
| remote_notice_new_inferior (ptid_t currthread, int running) |
| { |
| /* If this is a new thread, add it to GDB's thread list. |
| If we leave it up to WFI to do this, bad things will happen. */ |
| |
| if (in_thread_list (currthread) && is_exited (currthread)) |
| { |
| /* We're seeing an event on a thread id we knew had exited. |
| This has to be a new thread reusing the old id. Add it. */ |
| remote_add_thread (currthread, running); |
| return; |
| } |
| |
| if (!in_thread_list (currthread)) |
| { |
| struct inferior *inf = NULL; |
| int pid = ptid_get_pid (currthread); |
| |
| if (ptid_is_pid (inferior_ptid) |
| && pid == ptid_get_pid (inferior_ptid)) |
| { |
| /* inferior_ptid has no thread member yet. This can happen |
| with the vAttach -> remote_wait,"TAAthread:" path if the |
| stub doesn't support qC. This is the first stop reported |
| after an attach, so this is the main thread. Update the |
| ptid in the thread list. */ |
| if (in_thread_list (pid_to_ptid (pid))) |
| thread_change_ptid (inferior_ptid, currthread); |
| else |
| { |
| remote_add_thread (currthread, running); |
| inferior_ptid = currthread; |
| } |
| return; |
| } |
| |
| if (ptid_equal (magic_null_ptid, inferior_ptid)) |
| { |
| /* inferior_ptid is not set yet. This can happen with the |
| vRun -> remote_wait,"TAAthread:" path if the stub |
| doesn't support qC. This is the first stop reported |
| after an attach, so this is the main thread. Update the |
| ptid in the thread list. */ |
| thread_change_ptid (inferior_ptid, currthread); |
| return; |
| } |
| |
| /* When connecting to a target remote, or to a target |
| extended-remote which already was debugging an inferior, we |
| may not know about it yet. Add it before adding its child |
| thread, so notifications are emitted in a sensible order. */ |
| if (!in_inferior_list (ptid_get_pid (currthread))) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int fake_pid_p = !remote_multi_process_p (rs); |
| |
| inf = remote_add_inferior (fake_pid_p, |
| ptid_get_pid (currthread), -1, 1); |
| } |
| |
| /* This is really a new thread. Add it. */ |
| remote_add_thread (currthread, running); |
| |
| /* If we found a new inferior, let the common code do whatever |
| it needs to with it (e.g., read shared libraries, insert |
| breakpoints), unless we're just setting up an all-stop |
| connection. */ |
| if (inf != NULL) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!rs->starting_up) |
| notice_new_inferior (currthread, running, 0); |
| } |
| } |
| } |
| |
| /* Return the private thread data, creating it if necessary. */ |
| |
| static struct private_thread_info * |
| demand_private_info (ptid_t ptid) |
| { |
| struct thread_info *info = find_thread_ptid (ptid); |
| |
| gdb_assert (info); |
| |
| if (!info->priv) |
| { |
| info->priv = XNEW (struct private_thread_info); |
| info->private_dtor = free_private_thread_info; |
| info->priv->core = -1; |
| info->priv->extra = NULL; |
| info->priv->name = NULL; |
| } |
| |
| return info->priv; |
| } |
| |
| /* Call this function as a result of |
| 1) A halt indication (T packet) containing a thread id |
| 2) A direct query of currthread |
| 3) Successful execution of set thread */ |
| |
| static void |
| record_currthread (struct remote_state *rs, ptid_t currthread) |
| { |
| rs->general_thread = currthread; |
| } |
| |
| /* If 'QPassSignals' is supported, tell the remote stub what signals |
| it can simply pass through to the inferior without reporting. */ |
| |
| static void |
| remote_pass_signals (struct target_ops *self, |
| int numsigs, unsigned char *pass_signals) |
| { |
| if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE) |
| { |
| char *pass_packet, *p; |
| int count = 0, i; |
| struct remote_state *rs = get_remote_state (); |
| |
| gdb_assert (numsigs < 256); |
| for (i = 0; i < numsigs; i++) |
| { |
| if (pass_signals[i]) |
| count++; |
| } |
| pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1); |
| strcpy (pass_packet, "QPassSignals:"); |
| p = pass_packet + strlen (pass_packet); |
| for (i = 0; i < numsigs; i++) |
| { |
| if (pass_signals[i]) |
| { |
| if (i >= 16) |
| *p++ = tohex (i >> 4); |
| *p++ = tohex (i & 15); |
| if (count) |
| *p++ = ';'; |
| else |
| break; |
| count--; |
| } |
| } |
| *p = 0; |
| if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet)) |
| { |
| putpkt (pass_packet); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]); |
| if (rs->last_pass_packet) |
| xfree (rs->last_pass_packet); |
| rs->last_pass_packet = pass_packet; |
| } |
| else |
| xfree (pass_packet); |
| } |
| } |
| |
| /* If 'QCatchSyscalls' is supported, tell the remote stub |
| to report syscalls to GDB. */ |
| |
| static int |
| remote_set_syscall_catchpoint (struct target_ops *self, |
| int pid, int needed, int any_count, |
| int table_size, int *table) |
| { |
| char *catch_packet; |
| enum packet_result result; |
| int n_sysno = 0; |
| |
| if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE) |
| { |
| /* Not supported. */ |
| return 1; |
| } |
| |
| if (needed && !any_count) |
| { |
| int i; |
| |
| /* Count how many syscalls are to be caught (table[sysno] != 0). */ |
| for (i = 0; i < table_size; i++) |
| { |
| if (table[i] != 0) |
| n_sysno++; |
| } |
| } |
| |
| if (remote_debug) |
| { |
| fprintf_unfiltered (gdb_stdlog, |
| "remote_set_syscall_catchpoint " |
| "pid %d needed %d any_count %d n_sysno %d\n", |
| pid, needed, any_count, n_sysno); |
| } |
| |
| if (needed) |
| { |
| /* Prepare a packet with the sysno list, assuming max 8+1 |
| characters for a sysno. If the resulting packet size is too |
| big, fallback on the non-selective packet. */ |
| const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1; |
| |
| catch_packet = (char *) xmalloc (maxpktsz); |
| strcpy (catch_packet, "QCatchSyscalls:1"); |
| if (!any_count) |
| { |
| int i; |
| char *p; |
| |
| p = catch_packet; |
| p += strlen (p); |
| |
| /* Add in catch_packet each syscall to be caught (table[i] != 0). */ |
| for (i = 0; i < table_size; i++) |
| { |
| if (table[i] != 0) |
| p += xsnprintf (p, catch_packet + maxpktsz - p, ";%x", i); |
| } |
| } |
| if (strlen (catch_packet) > get_remote_packet_size ()) |
| { |
| /* catch_packet too big. Fallback to less efficient |
| non selective mode, with GDB doing the filtering. */ |
| catch_packet[sizeof ("QCatchSyscalls:1") - 1] = 0; |
| } |
| } |
| else |
| catch_packet = xstrdup ("QCatchSyscalls:0"); |
| |
| { |
| struct cleanup *old_chain = make_cleanup (xfree, catch_packet); |
| struct remote_state *rs = get_remote_state (); |
| |
| putpkt (catch_packet); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]); |
| do_cleanups (old_chain); |
| if (result == PACKET_OK) |
| return 0; |
| else |
| return -1; |
| } |
| } |
| |
| /* If 'QProgramSignals' is supported, tell the remote stub what |
| signals it should pass through to the inferior when detaching. */ |
| |
| static void |
| remote_program_signals (struct target_ops *self, |
| int numsigs, unsigned char *signals) |
| { |
| if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE) |
| { |
| char *packet, *p; |
| int count = 0, i; |
| struct remote_state *rs = get_remote_state (); |
| |
| gdb_assert (numsigs < 256); |
| for (i = 0; i < numsigs; i++) |
| { |
| if (signals[i]) |
| count++; |
| } |
| packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1); |
| strcpy (packet, "QProgramSignals:"); |
| p = packet + strlen (packet); |
| for (i = 0; i < numsigs; i++) |
| { |
| if (signal_pass_state (i)) |
| { |
| if (i >= 16) |
| *p++ = tohex (i >> 4); |
| *p++ = tohex (i & 15); |
| if (count) |
| *p++ = ';'; |
| else |
| break; |
| count--; |
| } |
| } |
| *p = 0; |
| if (!rs->last_program_signals_packet |
| || strcmp (rs->last_program_signals_packet, packet) != 0) |
| { |
| putpkt (packet); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]); |
| xfree (rs->last_program_signals_packet); |
| rs->last_program_signals_packet = packet; |
| } |
| else |
| xfree (packet); |
| } |
| } |
| |
| /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is |
| MINUS_ONE_PTID, set the thread to -1, so the stub returns the |
| thread. If GEN is set, set the general thread, if not, then set |
| the step/continue thread. */ |
| static void |
| set_thread (struct ptid ptid, int gen) |
| { |
| struct remote_state *rs = get_remote_state (); |
| ptid_t state = gen ? rs->general_thread : rs->continue_thread; |
| char *buf = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| |
| if (ptid_equal (state, ptid)) |
| return; |
| |
| *buf++ = 'H'; |
| *buf++ = gen ? 'g' : 'c'; |
| if (ptid_equal (ptid, magic_null_ptid)) |
| xsnprintf (buf, endbuf - buf, "0"); |
| else if (ptid_equal (ptid, any_thread_ptid)) |
| xsnprintf (buf, endbuf - buf, "0"); |
| else if (ptid_equal (ptid, minus_one_ptid)) |
| xsnprintf (buf, endbuf - buf, "-1"); |
| else |
| write_ptid (buf, endbuf, ptid); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (gen) |
| rs->general_thread = ptid; |
| else |
| rs->continue_thread = ptid; |
| } |
| |
| static void |
| set_general_thread (struct ptid ptid) |
| { |
| set_thread (ptid, 1); |
| } |
| |
| static void |
| set_continue_thread (struct ptid ptid) |
| { |
| set_thread (ptid, 0); |
| } |
| |
| /* Change the remote current process. Which thread within the process |
| ends up selected isn't important, as long as it is the same process |
| as what INFERIOR_PTID points to. |
| |
| This comes from that fact that there is no explicit notion of |
| "selected process" in the protocol. The selected process for |
| general operations is the process the selected general thread |
| belongs to. */ |
| |
| static void |
| set_general_process (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* If the remote can't handle multiple processes, don't bother. */ |
| if (!remote_multi_process_p (rs)) |
| return; |
| |
| /* We only need to change the remote current thread if it's pointing |
| at some other process. */ |
| if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid)) |
| set_general_thread (inferior_ptid); |
| } |
| |
| |
| /* Return nonzero if this is the main thread that we made up ourselves |
| to model non-threaded targets as single-threaded. */ |
| |
| static int |
| remote_thread_always_alive (struct target_ops *ops, ptid_t ptid) |
| { |
| if (ptid_equal (ptid, magic_null_ptid)) |
| /* The main thread is always alive. */ |
| return 1; |
| |
| if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0) |
| /* The main thread is always alive. This can happen after a |
| vAttach, if the remote side doesn't support |
| multi-threading. */ |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Return nonzero if the thread PTID is still alive on the remote |
| system. */ |
| |
| static int |
| remote_thread_alive (struct target_ops *ops, ptid_t ptid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p, *endp; |
| |
| /* Check if this is a thread that we made up ourselves to model |
| non-threaded targets as single-threaded. */ |
| if (remote_thread_always_alive (ops, ptid)) |
| return 1; |
| |
| p = rs->buf; |
| endp = rs->buf + get_remote_packet_size (); |
| |
| *p++ = 'T'; |
| write_ptid (p, endp, ptid); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| return (rs->buf[0] == 'O' && rs->buf[1] == 'K'); |
| } |
| |
| /* Return a pointer to a thread name if we know it and NULL otherwise. |
| The thread_info object owns the memory for the name. */ |
| |
| static const char * |
| remote_thread_name (struct target_ops *ops, struct thread_info *info) |
| { |
| if (info->priv != NULL) |
| return info->priv->name; |
| |
| return NULL; |
| } |
| |
| /* About these extended threadlist and threadinfo packets. They are |
| variable length packets but, the fields within them are often fixed |
| length. They are redundent enough to send over UDP as is the |
| remote protocol in general. There is a matching unit test module |
| in libstub. */ |
| |
| /* WARNING: This threadref data structure comes from the remote O.S., |
| libstub protocol encoding, and remote.c. It is not particularly |
| changable. */ |
| |
| /* Right now, the internal structure is int. We want it to be bigger. |
| Plan to fix this. */ |
| |
| typedef int gdb_threadref; /* Internal GDB thread reference. */ |
| |
| /* gdb_ext_thread_info is an internal GDB data structure which is |
| equivalent to the reply of the remote threadinfo packet. */ |
| |
| struct gdb_ext_thread_info |
| { |
| threadref threadid; /* External form of thread reference. */ |
| int active; /* Has state interesting to GDB? |
| regs, stack. */ |
| char display[256]; /* Brief state display, name, |
| blocked/suspended. */ |
| char shortname[32]; /* To be used to name threads. */ |
| char more_display[256]; /* Long info, statistics, queue depth, |
| whatever. */ |
| }; |
| |
| /* The volume of remote transfers can be limited by submitting |
| a mask containing bits specifying the desired information. |
| Use a union of these values as the 'selection' parameter to |
| get_thread_info. FIXME: Make these TAG names more thread specific. */ |
| |
| #define TAG_THREADID 1 |
| #define TAG_EXISTS 2 |
| #define TAG_DISPLAY 4 |
| #define TAG_THREADNAME 8 |
| #define TAG_MOREDISPLAY 16 |
| |
| #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2) |
| |
| static char *unpack_nibble (char *buf, int *val); |
| |
| static char *unpack_byte (char *buf, int *value); |
| |
| static char *pack_int (char *buf, int value); |
| |
| static char *unpack_int (char *buf, int *value); |
| |
| static char *unpack_string (char *src, char *dest, int length); |
| |
| static char *pack_threadid (char *pkt, threadref *id); |
| |
| static char *unpack_threadid (char *inbuf, threadref *id); |
| |
| void int_to_threadref (threadref *id, int value); |
| |
| static int threadref_to_int (threadref *ref); |
| |
| static void copy_threadref (threadref *dest, threadref *src); |
| |
| static int threadmatch (threadref *dest, threadref *src); |
| |
| static char *pack_threadinfo_request (char *pkt, int mode, |
| threadref *id); |
| |
| static int remote_unpack_thread_info_response (char *pkt, |
| threadref *expectedref, |
| struct gdb_ext_thread_info |
| *info); |
| |
| |
| static int remote_get_threadinfo (threadref *threadid, |
| int fieldset, /*TAG mask */ |
| struct gdb_ext_thread_info *info); |
| |
| static char *pack_threadlist_request (char *pkt, int startflag, |
| int threadcount, |
| threadref *nextthread); |
| |
| static int parse_threadlist_response (char *pkt, |
| int result_limit, |
| threadref *original_echo, |
| threadref *resultlist, |
| int *doneflag); |
| |
| static int remote_get_threadlist (int startflag, |
| threadref *nextthread, |
| int result_limit, |
| int *done, |
| int *result_count, |
| threadref *threadlist); |
| |
| typedef int (*rmt_thread_action) (threadref *ref, void *context); |
| |
| static int remote_threadlist_iterator (rmt_thread_action stepfunction, |
| void *context, int looplimit); |
| |
| static int remote_newthread_step (threadref *ref, void *context); |
| |
| |
| /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the |
| buffer we're allowed to write to. Returns |
| BUF+CHARACTERS_WRITTEN. */ |
| |
| static char * |
| write_ptid (char *buf, const char *endbuf, ptid_t ptid) |
| { |
| int pid, tid; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (remote_multi_process_p (rs)) |
| { |
| pid = ptid_get_pid (ptid); |
| if (pid < 0) |
| buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid); |
| else |
| buf += xsnprintf (buf, endbuf - buf, "p%x.", pid); |
| } |
| tid = ptid_get_lwp (ptid); |
| if (tid < 0) |
| buf += xsnprintf (buf, endbuf - buf, "-%x", -tid); |
| else |
| buf += xsnprintf (buf, endbuf - buf, "%x", tid); |
| |
| return buf; |
| } |
| |
| /* Extract a PTID from BUF. If non-null, OBUF is set to the to one |
| passed the last parsed char. Returns null_ptid on error. */ |
| |
| static ptid_t |
| read_ptid (char *buf, char **obuf) |
| { |
| char *p = buf; |
| char *pp; |
| ULONGEST pid = 0, tid = 0; |
| |
| if (*p == 'p') |
| { |
| /* Multi-process ptid. */ |
| pp = unpack_varlen_hex (p + 1, &pid); |
| if (*pp != '.') |
| error (_("invalid remote ptid: %s"), p); |
| |
| p = pp; |
| pp = unpack_varlen_hex (p + 1, &tid); |
| if (obuf) |
| *obuf = pp; |
| return ptid_build (pid, tid, 0); |
| } |
| |
| /* No multi-process. Just a tid. */ |
| pp = unpack_varlen_hex (p, &tid); |
| |
| /* Return null_ptid when no thread id is found. */ |
| if (p == pp) |
| { |
| if (obuf) |
| *obuf = pp; |
| return null_ptid; |
| } |
| |
| /* Since the stub is not sending a process id, then default to |
| what's in inferior_ptid, unless it's null at this point. If so, |
| then since there's no way to know the pid of the reported |
| threads, use the magic number. */ |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| pid = ptid_get_pid (magic_null_ptid); |
| else |
| pid = ptid_get_pid (inferior_ptid); |
| |
| if (obuf) |
| *obuf = pp; |
| return ptid_build (pid, tid, 0); |
| } |
| |
| static int |
| stubhex (int ch) |
| { |
| if (ch >= 'a' && ch <= 'f') |
| return ch - 'a' + 10; |
| if (ch >= '0' && ch <= '9') |
| return ch - '0'; |
| if (ch >= 'A' && ch <= 'F') |
| return ch - 'A' + 10; |
| return -1; |
| } |
| |
| static int |
| stub_unpack_int (char *buff, int fieldlength) |
| { |
| int nibble; |
| int retval = 0; |
| |
| while (fieldlength) |
| { |
| nibble = stubhex (*buff++); |
| retval |= nibble; |
| fieldlength--; |
| if (fieldlength) |
| retval = retval << 4; |
| } |
| return retval; |
| } |
| |
| static char * |
| unpack_nibble (char *buf, int *val) |
| { |
| *val = fromhex (*buf++); |
| return buf; |
| } |
| |
| static char * |
| unpack_byte (char *buf, int *value) |
| { |
| *value = stub_unpack_int (buf, 2); |
| return buf + 2; |
| } |
| |
| static char * |
| pack_int (char *buf, int value) |
| { |
| buf = pack_hex_byte (buf, (value >> 24) & 0xff); |
| buf = pack_hex_byte (buf, (value >> 16) & 0xff); |
| buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); |
| buf = pack_hex_byte (buf, (value & 0xff)); |
| return buf; |
| } |
| |
| static char * |
| unpack_int (char *buf, int *value) |
| { |
| *value = stub_unpack_int (buf, 8); |
| return buf + 8; |
| } |
| |
| #if 0 /* Currently unused, uncomment when needed. */ |
| static char *pack_string (char *pkt, char *string); |
| |
| static char * |
| pack_string (char *pkt, char *string) |
| { |
| char ch; |
| int len; |
| |
| len = strlen (string); |
| if (len > 200) |
| len = 200; /* Bigger than most GDB packets, junk??? */ |
| pkt = pack_hex_byte (pkt, len); |
| while (len-- > 0) |
| { |
| ch = *string++; |
| if ((ch == '\0') || (ch == '#')) |
| ch = '*'; /* Protect encapsulation. */ |
| *pkt++ = ch; |
| } |
| return pkt; |
| } |
| #endif /* 0 (unused) */ |
| |
| static char * |
| unpack_string (char *src, char *dest, int length) |
| { |
| while (length--) |
| *dest++ = *src++; |
| *dest = '\0'; |
| return src; |
| } |
| |
| static char * |
| pack_threadid (char *pkt, threadref *id) |
| { |
| char *limit; |
| unsigned char *altid; |
| |
| altid = (unsigned char *) id; |
| limit = pkt + BUF_THREAD_ID_SIZE; |
| while (pkt < limit) |
| pkt = pack_hex_byte (pkt, *altid++); |
| return pkt; |
| } |
| |
| |
| static char * |
| unpack_threadid (char *inbuf, threadref *id) |
| { |
| char *altref; |
| char *limit = inbuf + BUF_THREAD_ID_SIZE; |
| int x, y; |
| |
| altref = (char *) id; |
| |
| while (inbuf < limit) |
| { |
| x = stubhex (*inbuf++); |
| y = stubhex (*inbuf++); |
| *altref++ = (x << 4) | y; |
| } |
| return inbuf; |
| } |
| |
| /* Externally, threadrefs are 64 bits but internally, they are still |
| ints. This is due to a mismatch of specifications. We would like |
| to use 64bit thread references internally. This is an adapter |
| function. */ |
| |
| void |
| int_to_threadref (threadref *id, int value) |
| { |
| unsigned char *scan; |
| |
| scan = (unsigned char *) id; |
| { |
| int i = 4; |
| while (i--) |
| *scan++ = 0; |
| } |
| *scan++ = (value >> 24) & 0xff; |
| *scan++ = (value >> 16) & 0xff; |
| *scan++ = (value >> 8) & 0xff; |
| *scan++ = (value & 0xff); |
| } |
| |
| static int |
| threadref_to_int (threadref *ref) |
| { |
| int i, value = 0; |
| unsigned char *scan; |
| |
| scan = *ref; |
| scan += 4; |
| i = 4; |
| while (i-- > 0) |
| value = (value << 8) | ((*scan++) & 0xff); |
| return value; |
| } |
| |
| static void |
| copy_threadref (threadref *dest, threadref *src) |
| { |
| int i; |
| unsigned char *csrc, *cdest; |
| |
| csrc = (unsigned char *) src; |
| cdest = (unsigned char *) dest; |
| i = 8; |
| while (i--) |
| *cdest++ = *csrc++; |
| } |
| |
| static int |
| threadmatch (threadref *dest, threadref *src) |
| { |
| /* Things are broken right now, so just assume we got a match. */ |
| #if 0 |
| unsigned char *srcp, *destp; |
| int i, result; |
| srcp = (char *) src; |
| destp = (char *) dest; |
| |
| result = 1; |
| while (i-- > 0) |
| result &= (*srcp++ == *destp++) ? 1 : 0; |
| return result; |
| #endif |
| return 1; |
| } |
| |
| /* |
| threadid:1, # always request threadid |
| context_exists:2, |
| display:4, |
| unique_name:8, |
| more_display:16 |
| */ |
| |
| /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ |
| |
| static char * |
| pack_threadinfo_request (char *pkt, int mode, threadref *id) |
| { |
| *pkt++ = 'q'; /* Info Query */ |
| *pkt++ = 'P'; /* process or thread info */ |
| pkt = pack_int (pkt, mode); /* mode */ |
| pkt = pack_threadid (pkt, id); /* threadid */ |
| *pkt = '\0'; /* terminate */ |
| return pkt; |
| } |
| |
| /* These values tag the fields in a thread info response packet. */ |
| /* Tagging the fields allows us to request specific fields and to |
| add more fields as time goes by. */ |
| |
| #define TAG_THREADID 1 /* Echo the thread identifier. */ |
| #define TAG_EXISTS 2 /* Is this process defined enough to |
| fetch registers and its stack? */ |
| #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ |
| #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */ |
| #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about |
| the process. */ |
| |
| static int |
| remote_unpack_thread_info_response (char *pkt, threadref *expectedref, |
| struct gdb_ext_thread_info *info) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int mask, length; |
| int tag; |
| threadref ref; |
| char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */ |
| int retval = 1; |
| |
| /* info->threadid = 0; FIXME: implement zero_threadref. */ |
| info->active = 0; |
| info->display[0] = '\0'; |
| info->shortname[0] = '\0'; |
| info->more_display[0] = '\0'; |
| |
| /* Assume the characters indicating the packet type have been |
| stripped. */ |
| pkt = unpack_int (pkt, &mask); /* arg mask */ |
| pkt = unpack_threadid (pkt, &ref); |
| |
| if (mask == 0) |
| warning (_("Incomplete response to threadinfo request.")); |
| if (!threadmatch (&ref, expectedref)) |
| { /* This is an answer to a different request. */ |
| warning (_("ERROR RMT Thread info mismatch.")); |
| return 0; |
| } |
| copy_threadref (&info->threadid, &ref); |
| |
| /* Loop on tagged fields , try to bail if somthing goes wrong. */ |
| |
| /* Packets are terminated with nulls. */ |
| while ((pkt < limit) && mask && *pkt) |
| { |
| pkt = unpack_int (pkt, &tag); /* tag */ |
| pkt = unpack_byte (pkt, &length); /* length */ |
| if (!(tag & mask)) /* Tags out of synch with mask. */ |
| { |
| warning (_("ERROR RMT: threadinfo tag mismatch.")); |
| retval = 0; |
| break; |
| } |
| if (tag == TAG_THREADID) |
| { |
| if (length != 16) |
| { |
| warning (_("ERROR RMT: length of threadid is not 16.")); |
| retval = 0; |
| break; |
| } |
| pkt = unpack_threadid (pkt, &ref); |
| mask = mask & ~TAG_THREADID; |
| continue; |
| } |
| if (tag == TAG_EXISTS) |
| { |
| info->active = stub_unpack_int (pkt, length); |
| pkt += length; |
| mask = mask & ~(TAG_EXISTS); |
| if (length > 8) |
| { |
| warning (_("ERROR RMT: 'exists' length too long.")); |
| retval = 0; |
| break; |
| } |
| continue; |
| } |
| if (tag == TAG_THREADNAME) |
| { |
| pkt = unpack_string (pkt, &info->shortname[0], length); |
| mask = mask & ~TAG_THREADNAME; |
| continue; |
| } |
| if (tag == TAG_DISPLAY) |
| { |
| pkt = unpack_string (pkt, &info->display[0], length); |
| mask = mask & ~TAG_DISPLAY; |
| continue; |
| } |
| if (tag == TAG_MOREDISPLAY) |
| { |
| pkt = unpack_string (pkt, &info->more_display[0], length); |
| mask = mask & ~TAG_MOREDISPLAY; |
| continue; |
| } |
| warning (_("ERROR RMT: unknown thread info tag.")); |
| break; /* Not a tag we know about. */ |
| } |
| return retval; |
| } |
| |
| static int |
| remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ |
| struct gdb_ext_thread_info *info) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int result; |
| |
| pack_threadinfo_request (rs->buf, fieldset, threadid); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (rs->buf[0] == '\0') |
| return 0; |
| |
| result = remote_unpack_thread_info_response (rs->buf + 2, |
| threadid, info); |
| return result; |
| } |
| |
| /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ |
| |
| static char * |
| pack_threadlist_request (char *pkt, int startflag, int threadcount, |
| threadref *nextthread) |
| { |
| *pkt++ = 'q'; /* info query packet */ |
| *pkt++ = 'L'; /* Process LIST or threadLIST request */ |
| pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ |
| pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ |
| pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ |
| *pkt = '\0'; |
| return pkt; |
| } |
| |
| /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ |
| |
| static int |
| parse_threadlist_response (char *pkt, int result_limit, |
| threadref *original_echo, threadref *resultlist, |
| int *doneflag) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *limit; |
| int count, resultcount, done; |
| |
| resultcount = 0; |
| /* Assume the 'q' and 'M chars have been stripped. */ |
| limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE); |
| /* done parse past here */ |
| pkt = unpack_byte (pkt, &count); /* count field */ |
| pkt = unpack_nibble (pkt, &done); |
| /* The first threadid is the argument threadid. */ |
| pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ |
| while ((count-- > 0) && (pkt < limit)) |
| { |
| pkt = unpack_threadid (pkt, resultlist++); |
| if (resultcount++ >= result_limit) |
| break; |
| } |
| if (doneflag) |
| *doneflag = done; |
| return resultcount; |
| } |
| |
| /* Fetch the next batch of threads from the remote. Returns -1 if the |
| qL packet is not supported, 0 on error and 1 on success. */ |
| |
| static int |
| remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, |
| int *done, int *result_count, threadref *threadlist) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int result = 1; |
| |
| /* Trancate result limit to be smaller than the packet size. */ |
| if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) |
| >= get_remote_packet_size ()) |
| result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2; |
| |
| pack_threadlist_request (rs->buf, startflag, result_limit, nextthread); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (*rs->buf == '\0') |
| { |
| /* Packet not supported. */ |
| return -1; |
| } |
| |
| *result_count = |
| parse_threadlist_response (rs->buf + 2, result_limit, |
| &rs->echo_nextthread, threadlist, done); |
| |
| if (!threadmatch (&rs->echo_nextthread, nextthread)) |
| { |
| /* FIXME: This is a good reason to drop the packet. */ |
| /* Possably, there is a duplicate response. */ |
| /* Possabilities : |
| retransmit immediatly - race conditions |
| retransmit after timeout - yes |
| exit |
| wait for packet, then exit |
| */ |
| warning (_("HMM: threadlist did not echo arg thread, dropping it.")); |
| return 0; /* I choose simply exiting. */ |
| } |
| if (*result_count <= 0) |
| { |
| if (*done != 1) |
| { |
| warning (_("RMT ERROR : failed to get remote thread list.")); |
| result = 0; |
| } |
| return result; /* break; */ |
| } |
| if (*result_count > result_limit) |
| { |
| *result_count = 0; |
| warning (_("RMT ERROR: threadlist response longer than requested.")); |
| return 0; |
| } |
| return result; |
| } |
| |
| /* Fetch the list of remote threads, with the qL packet, and call |
| STEPFUNCTION for each thread found. Stops iterating and returns 1 |
| if STEPFUNCTION returns true. Stops iterating and returns 0 if the |
| STEPFUNCTION returns false. If the packet is not supported, |
| returns -1. */ |
| |
| static int |
| remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, |
| int looplimit) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int done, i, result_count; |
| int startflag = 1; |
| int result = 1; |
| int loopcount = 0; |
| |
| done = 0; |
| while (!done) |
| { |
| if (loopcount++ > looplimit) |
| { |
| result = 0; |
| warning (_("Remote fetch threadlist -infinite loop-.")); |
| break; |
| } |
| result = remote_get_threadlist (startflag, &rs->nextthread, |
| MAXTHREADLISTRESULTS, |
| &done, &result_count, |
| rs->resultthreadlist); |
| if (result <= 0) |
| break; |
| /* Clear for later iterations. */ |
| startflag = 0; |
| /* Setup to resume next batch of thread references, set nextthread. */ |
| if (result_count >= 1) |
| copy_threadref (&rs->nextthread, |
| &rs->resultthreadlist[result_count - 1]); |
| i = 0; |
| while (result_count--) |
| { |
| if (!(*stepfunction) (&rs->resultthreadlist[i++], context)) |
| { |
| result = 0; |
| break; |
| } |
| } |
| } |
| return result; |
| } |
| |
| /* A thread found on the remote target. */ |
| |
| typedef struct thread_item |
| { |
| /* The thread's PTID. */ |
| ptid_t ptid; |
| |
| /* The thread's extra info. May be NULL. */ |
| char *extra; |
| |
| /* The thread's name. May be NULL. */ |
| char *name; |
| |
| /* The core the thread was running on. -1 if not known. */ |
| int core; |
| } thread_item_t; |
| DEF_VEC_O(thread_item_t); |
| |
| /* Context passed around to the various methods listing remote |
| threads. As new threads are found, they're added to the ITEMS |
| vector. */ |
| |
| struct threads_listing_context |
| { |
| /* The threads found on the remote target. */ |
| VEC (thread_item_t) *items; |
| }; |
| |
| /* Discard the contents of the constructed thread listing context. */ |
| |
| static void |
| clear_threads_listing_context (void *p) |
| { |
| struct threads_listing_context *context |
| = (struct threads_listing_context *) p; |
| int i; |
| struct thread_item *item; |
| |
| for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) |
| { |
| xfree (item->extra); |
| xfree (item->name); |
| } |
| |
| VEC_free (thread_item_t, context->items); |
| } |
| |
| /* Remove the thread specified as the related_pid field of WS |
| from the CONTEXT list. */ |
| |
| static void |
| threads_listing_context_remove (struct target_waitstatus *ws, |
| struct threads_listing_context *context) |
| { |
| struct thread_item *item; |
| int i; |
| ptid_t child_ptid = ws->value.related_pid; |
| |
| for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i) |
| { |
| if (ptid_equal (item->ptid, child_ptid)) |
| { |
| VEC_ordered_remove (thread_item_t, context->items, i); |
| break; |
| } |
| } |
| } |
| |
| static int |
| remote_newthread_step (threadref *ref, void *data) |
| { |
| struct threads_listing_context *context |
| = (struct threads_listing_context *) data; |
| struct thread_item item; |
| int pid = ptid_get_pid (inferior_ptid); |
| |
| item.ptid = ptid_build (pid, threadref_to_int (ref), 0); |
| item.core = -1; |
| item.name = NULL; |
| item.extra = NULL; |
| |
| VEC_safe_push (thread_item_t, context->items, &item); |
| |
| return 1; /* continue iterator */ |
| } |
| |
| #define CRAZY_MAX_THREADS 1000 |
| |
| static ptid_t |
| remote_current_thread (ptid_t oldpid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| putpkt ("qC"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (rs->buf[0] == 'Q' && rs->buf[1] == 'C') |
| { |
| char *obuf; |
| ptid_t result; |
| |
| result = read_ptid (&rs->buf[2], &obuf); |
| if (*obuf != '\0' && remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "warning: garbage in qC reply\n"); |
| |
| return result; |
| } |
| else |
| return oldpid; |
| } |
| |
| /* List remote threads using the deprecated qL packet. */ |
| |
| static int |
| remote_get_threads_with_ql (struct target_ops *ops, |
| struct threads_listing_context *context) |
| { |
| if (remote_threadlist_iterator (remote_newthread_step, context, |
| CRAZY_MAX_THREADS) >= 0) |
| return 1; |
| |
| return 0; |
| } |
| |
| #if defined(HAVE_LIBEXPAT) |
| |
| static void |
| start_thread (struct gdb_xml_parser *parser, |
| const struct gdb_xml_element *element, |
| void *user_data, VEC(gdb_xml_value_s) *attributes) |
| { |
| struct threads_listing_context *data |
| = (struct threads_listing_context *) user_data; |
| |
| struct thread_item item; |
| char *id; |
| struct gdb_xml_value *attr; |
| |
| id = (char *) xml_find_attribute (attributes, "id")->value; |
| item.ptid = read_ptid (id, NULL); |
| |
| attr = xml_find_attribute (attributes, "core"); |
| if (attr != NULL) |
| item.core = *(ULONGEST *) attr->value; |
| else |
| item.core = -1; |
| |
| attr = xml_find_attribute (attributes, "name"); |
| item.name = attr != NULL ? xstrdup ((const char *) attr->value) : NULL; |
| |
| item.extra = 0; |
| |
| VEC_safe_push (thread_item_t, data->items, &item); |
| } |
| |
| static void |
| end_thread (struct gdb_xml_parser *parser, |
| const struct gdb_xml_element *element, |
| void *user_data, const char *body_text) |
| { |
| struct threads_listing_context *data |
| = (struct threads_listing_context *) user_data; |
| |
| if (body_text && *body_text) |
| VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text); |
| } |
| |
| const struct gdb_xml_attribute thread_attributes[] = { |
| { "id", GDB_XML_AF_NONE, NULL, NULL }, |
| { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL }, |
| { "name", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| }; |
| |
| const struct gdb_xml_element thread_children[] = { |
| { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| }; |
| |
| const struct gdb_xml_element threads_children[] = { |
| { "thread", thread_attributes, thread_children, |
| GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| start_thread, end_thread }, |
| { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| }; |
| |
| const struct gdb_xml_element threads_elements[] = { |
| { "threads", NULL, threads_children, |
| GDB_XML_EF_NONE, NULL, NULL }, |
| { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| }; |
| |
| #endif |
| |
| /* List remote threads using qXfer:threads:read. */ |
| |
| static int |
| remote_get_threads_with_qxfer (struct target_ops *ops, |
| struct threads_listing_context *context) |
| { |
| #if defined(HAVE_LIBEXPAT) |
| if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) |
| { |
| char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL); |
| struct cleanup *back_to = make_cleanup (xfree, xml); |
| |
| if (xml != NULL && *xml != '\0') |
| { |
| gdb_xml_parse_quick (_("threads"), "threads.dtd", |
| threads_elements, xml, context); |
| } |
| |
| do_cleanups (back_to); |
| return 1; |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| /* List remote threads using qfThreadInfo/qsThreadInfo. */ |
| |
| static int |
| remote_get_threads_with_qthreadinfo (struct target_ops *ops, |
| struct threads_listing_context *context) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->use_threadinfo_query) |
| { |
| char *bufp; |
| |
| putpkt ("qfThreadInfo"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| bufp = rs->buf; |
| if (bufp[0] != '\0') /* q packet recognized */ |
| { |
| while (*bufp++ == 'm') /* reply contains one or more TID */ |
| { |
| do |
| { |
| struct thread_item item; |
| |
| item.ptid = read_ptid (bufp, &bufp); |
| item.core = -1; |
| item.name = NULL; |
| item.extra = NULL; |
| |
| VEC_safe_push (thread_item_t, context->items, &item); |
| } |
| while (*bufp++ == ','); /* comma-separated list */ |
| putpkt ("qsThreadInfo"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| bufp = rs->buf; |
| } |
| return 1; |
| } |
| else |
| { |
| /* Packet not recognized. */ |
| rs->use_threadinfo_query = 0; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Implement the to_update_thread_list function for the remote |
| targets. */ |
| |
| static void |
| remote_update_thread_list (struct target_ops *ops) |
| { |
| struct threads_listing_context context; |
| struct cleanup *old_chain; |
| int got_list = 0; |
| |
| context.items = NULL; |
| old_chain = make_cleanup (clear_threads_listing_context, &context); |
| |
| /* We have a few different mechanisms to fetch the thread list. Try |
| them all, starting with the most preferred one first, falling |
| back to older methods. */ |
| if (remote_get_threads_with_qxfer (ops, &context) |
| || remote_get_threads_with_qthreadinfo (ops, &context) |
| || remote_get_threads_with_ql (ops, &context)) |
| { |
| int i; |
| struct thread_item *item; |
| struct thread_info *tp, *tmp; |
| |
| got_list = 1; |
| |
| if (VEC_empty (thread_item_t, context.items) |
| && remote_thread_always_alive (ops, inferior_ptid)) |
| { |
| /* Some targets don't really support threads, but still |
| reply an (empty) thread list in response to the thread |
| listing packets, instead of replying "packet not |
| supported". Exit early so we don't delete the main |
| thread. */ |
| do_cleanups (old_chain); |
| return; |
| } |
| |
| /* CONTEXT now holds the current thread list on the remote |
| target end. Delete GDB-side threads no longer found on the |
| target. */ |
| ALL_THREADS_SAFE (tp, tmp) |
| { |
| for (i = 0; |
| VEC_iterate (thread_item_t, context.items, i, item); |
| ++i) |
| { |
| if (ptid_equal (item->ptid, tp->ptid)) |
| break; |
| } |
| |
| if (i == VEC_length (thread_item_t, context.items)) |
| { |
| /* Not found. */ |
| delete_thread (tp->ptid); |
| } |
| } |
| |
| /* Remove any unreported fork child threads from CONTEXT so |
| that we don't interfere with follow fork, which is where |
| creation of such threads is handled. */ |
| remove_new_fork_children (&context); |
| |
| /* And now add threads we don't know about yet to our list. */ |
| for (i = 0; |
| VEC_iterate (thread_item_t, context.items, i, item); |
| ++i) |
| { |
| if (!ptid_equal (item->ptid, null_ptid)) |
| { |
| struct private_thread_info *info; |
| /* In non-stop mode, we assume new found threads are |
| running until proven otherwise with a stop reply. In |
| all-stop, we can only get here if all threads are |
| stopped. */ |
| int running = target_is_non_stop_p () ? 1 : 0; |
| |
| remote_notice_new_inferior (item->ptid, running); |
| |
| info = demand_private_info (item->ptid); |
| info->core = item->core; |
| info->extra = item->extra; |
| item->extra = NULL; |
| info->name = item->name; |
| item->name = NULL; |
| } |
| } |
| } |
| |
| if (!got_list) |
| { |
| /* If no thread listing method is supported, then query whether |
| each known thread is alive, one by one, with the T packet. |
| If the target doesn't support threads at all, then this is a |
| no-op. See remote_thread_alive. */ |
| prune_threads (); |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* |
| * Collect a descriptive string about the given thread. |
| * The target may say anything it wants to about the thread |
| * (typically info about its blocked / runnable state, name, etc.). |
| * This string will appear in the info threads display. |
| * |
| * Optional: targets are not required to implement this function. |
| */ |
| |
| static char * |
| remote_threads_extra_info (struct target_ops *self, struct thread_info *tp) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int result; |
| int set; |
| threadref id; |
| struct gdb_ext_thread_info threadinfo; |
| static char display_buf[100]; /* arbitrary... */ |
| int n = 0; /* position in display_buf */ |
| |
| if (rs->remote_desc == 0) /* paranoia */ |
| internal_error (__FILE__, __LINE__, |
| _("remote_threads_extra_info")); |
| |
| if (ptid_equal (tp->ptid, magic_null_ptid) |
| || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0)) |
| /* This is the main thread which was added by GDB. The remote |
| server doesn't know about it. */ |
| return NULL; |
| |
| if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE) |
| { |
| struct thread_info *info = find_thread_ptid (tp->ptid); |
| |
| if (info && info->priv) |
| return info->priv->extra; |
| else |
| return NULL; |
| } |
| |
| if (rs->use_threadextra_query) |
| { |
| char *b = rs->buf; |
| char *endb = rs->buf + get_remote_packet_size (); |
| |
| xsnprintf (b, endb - b, "qThreadExtraInfo,"); |
| b += strlen (b); |
| write_ptid (b, endb, tp->ptid); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (rs->buf[0] != 0) |
| { |
| n = min (strlen (rs->buf) / 2, sizeof (display_buf)); |
| result = hex2bin (rs->buf, (gdb_byte *) display_buf, n); |
| display_buf [result] = '\0'; |
| return display_buf; |
| } |
| } |
| |
| /* If the above query fails, fall back to the old method. */ |
| rs->use_threadextra_query = 0; |
| set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| | TAG_MOREDISPLAY | TAG_DISPLAY; |
| int_to_threadref (&id, ptid_get_lwp (tp->ptid)); |
| if (remote_get_threadinfo (&id, set, &threadinfo)) |
| if (threadinfo.active) |
| { |
| if (*threadinfo.shortname) |
| n += xsnprintf (&display_buf[0], sizeof (display_buf) - n, |
| " Name: %s,", threadinfo.shortname); |
| if (*threadinfo.display) |
| n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| " State: %s,", threadinfo.display); |
| if (*threadinfo.more_display) |
| n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, |
| " Priority: %s", threadinfo.more_display); |
| |
| if (n > 0) |
| { |
| /* For purely cosmetic reasons, clear up trailing commas. */ |
| if (',' == display_buf[n-1]) |
| display_buf[n-1] = ' '; |
| return display_buf; |
| } |
| } |
| return NULL; |
| } |
| |
| |
| static int |
| remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr, |
| struct static_tracepoint_marker *marker) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| |
| xsnprintf (p, get_remote_packet_size (), "qTSTMat:"); |
| p += strlen (p); |
| p += hexnumstr (p, addr); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| |
| if (*p == 'E') |
| error (_("Remote failure reply: %s"), p); |
| |
| if (*p++ == 'm') |
| { |
| parse_static_tracepoint_marker_definition (p, &p, marker); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static VEC(static_tracepoint_marker_p) * |
| remote_static_tracepoint_markers_by_strid (struct target_ops *self, |
| const char *strid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| VEC(static_tracepoint_marker_p) *markers = NULL; |
| struct static_tracepoint_marker *marker = NULL; |
| struct cleanup *old_chain; |
| char *p; |
| |
| /* Ask for a first packet of static tracepoint marker |
| definition. */ |
| putpkt ("qTfSTM"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| if (*p == 'E') |
| error (_("Remote failure reply: %s"), p); |
| |
| old_chain = make_cleanup (free_current_marker, &marker); |
| |
| while (*p++ == 'm') |
| { |
| if (marker == NULL) |
| marker = XCNEW (struct static_tracepoint_marker); |
| |
| do |
| { |
| parse_static_tracepoint_marker_definition (p, &p, marker); |
| |
| if (strid == NULL || strcmp (strid, marker->str_id) == 0) |
| { |
| VEC_safe_push (static_tracepoint_marker_p, |
| markers, marker); |
| marker = NULL; |
| } |
| else |
| { |
| release_static_tracepoint_marker (marker); |
| memset (marker, 0, sizeof (*marker)); |
| } |
| } |
| while (*p++ == ','); /* comma-separated list */ |
| /* Ask for another packet of static tracepoint definition. */ |
| putpkt ("qTsSTM"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| } |
| |
| do_cleanups (old_chain); |
| return markers; |
| } |
| |
| |
| /* Implement the to_get_ada_task_ptid function for the remote targets. */ |
| |
| static ptid_t |
| remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
| { |
| return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0); |
| } |
| |
| |
| /* Restart the remote side; this is an extended protocol operation. */ |
| |
| static void |
| extended_remote_restart (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* Send the restart command; for reasons I don't understand the |
| remote side really expects a number after the "R". */ |
| xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0); |
| putpkt (rs->buf); |
| |
| remote_fileio_reset (); |
| } |
| |
| /* Clean up connection to a remote debugger. */ |
| |
| static void |
| remote_close (struct target_ops *self) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->remote_desc == NULL) |
| return; /* already closed */ |
| |
| /* Make sure we leave stdin registered in the event loop, and we |
| don't leave the async SIGINT signal handler installed. */ |
| remote_terminal_ours (self); |
| |
| serial_close (rs->remote_desc); |
| rs->remote_desc = NULL; |
| |
| /* We don't have a connection to the remote stub anymore. Get rid |
| of all the inferiors and their threads we were controlling. |
| Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame |
| will be unable to find the thread corresponding to (pid, 0, 0). */ |
| inferior_ptid = null_ptid; |
| discard_all_inferiors (); |
| |
| /* We are closing the remote target, so we should discard |
| everything of this target. */ |
| discard_pending_stop_replies_in_queue (rs); |
| |
| if (remote_async_inferior_event_token) |
| delete_async_event_handler (&remote_async_inferior_event_token); |
| |
| remote_notif_state_xfree (rs->notif_state); |
| |
| trace_reset_local_state (); |
| } |
| |
| /* Query the remote side for the text, data and bss offsets. */ |
| |
| static void |
| get_offsets (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf; |
| char *ptr; |
| int lose, num_segments = 0, do_sections, do_segments; |
| CORE_ADDR text_addr, data_addr, bss_addr, segments[2]; |
| struct section_offsets *offs; |
| struct symfile_segment_data *data; |
| |
| if (symfile_objfile == NULL) |
| return; |
| |
| putpkt ("qOffsets"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| buf = rs->buf; |
| |
| if (buf[0] == '\000') |
| return; /* Return silently. Stub doesn't support |
| this command. */ |
| if (buf[0] == 'E') |
| { |
| warning (_("Remote failure reply: %s"), buf); |
| return; |
| } |
| |
| /* Pick up each field in turn. This used to be done with scanf, but |
| scanf will make trouble if CORE_ADDR size doesn't match |
| conversion directives correctly. The following code will work |
| with any size of CORE_ADDR. */ |
| text_addr = data_addr = bss_addr = 0; |
| ptr = buf; |
| lose = 0; |
| |
| if (startswith (ptr, "Text=")) |
| { |
| ptr += 5; |
| /* Don't use strtol, could lose on big values. */ |
| while (*ptr && *ptr != ';') |
| text_addr = (text_addr << 4) + fromhex (*ptr++); |
| |
| if (startswith (ptr, ";Data=")) |
| { |
| ptr += 6; |
| while (*ptr && *ptr != ';') |
| data_addr = (data_addr << 4) + fromhex (*ptr++); |
| } |
| else |
| lose = 1; |
| |
| if (!lose && startswith (ptr, ";Bss=")) |
| { |
| ptr += 5; |
| while (*ptr && *ptr != ';') |
| bss_addr = (bss_addr << 4) + fromhex (*ptr++); |
| |
| if (bss_addr != data_addr) |
| warning (_("Target reported unsupported offsets: %s"), buf); |
| } |
| else |
| lose = 1; |
| } |
| else if (startswith (ptr, "TextSeg=")) |
| { |
| ptr += 8; |
| /* Don't use strtol, could lose on big values. */ |
| while (*ptr && *ptr != ';') |
| text_addr = (text_addr << 4) + fromhex (*ptr++); |
| num_segments = 1; |
| |
| if (startswith (ptr, ";DataSeg=")) |
| { |
| ptr += 9; |
| while (*ptr && *ptr != ';') |
| data_addr = (data_addr << 4) + fromhex (*ptr++); |
| num_segments++; |
| } |
| } |
| else |
| lose = 1; |
| |
| if (lose) |
| error (_("Malformed response to offset query, %s"), buf); |
| else if (*ptr != '\0') |
| warning (_("Target reported unsupported offsets: %s"), buf); |
| |
| offs = ((struct section_offsets *) |
| alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))); |
| memcpy (offs, symfile_objfile->section_offsets, |
| SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)); |
| |
| data = get_symfile_segment_data (symfile_objfile->obfd); |
| do_segments = (data != NULL); |
| do_sections = num_segments == 0; |
| |
| if (num_segments > 0) |
| { |
| segments[0] = text_addr; |
| segments[1] = data_addr; |
| } |
| /* If we have two segments, we can still try to relocate everything |
| by assuming that the .text and .data offsets apply to the whole |
| text and data segments. Convert the offsets given in the packet |
| to base addresses for symfile_map_offsets_to_segments. */ |
| else if (data && data->num_segments == 2) |
| { |
| segments[0] = data->segment_bases[0] + text_addr; |
| segments[1] = data->segment_bases[1] + data_addr; |
| num_segments = 2; |
| } |
| /* If the object file has only one segment, assume that it is text |
| rather than data; main programs with no writable data are rare, |
| but programs with no code are useless. Of course the code might |
| have ended up in the data segment... to detect that we would need |
| the permissions here. */ |
| else if (data && data->num_segments == 1) |
| { |
| segments[0] = data->segment_bases[0] + text_addr; |
| num_segments = 1; |
| } |
| /* There's no way to relocate by segment. */ |
| else |
| do_segments = 0; |
| |
| if (do_segments) |
| { |
| int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data, |
| offs, num_segments, segments); |
| |
| if (ret == 0 && !do_sections) |
| error (_("Can not handle qOffsets TextSeg " |
| "response with this symbol file")); |
| |
| if (ret > 0) |
| do_sections = 0; |
| } |
| |
| if (data) |
| free_symfile_segment_data (data); |
| |
| if (do_sections) |
| { |
| offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; |
| |
| /* This is a temporary kludge to force data and bss to use the |
| same offsets because that's what nlmconv does now. The real |
| solution requires changes to the stub and remote.c that I |
| don't have time to do right now. */ |
| |
| offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; |
| offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; |
| } |
| |
| objfile_relocate (symfile_objfile, offs); |
| } |
| |
| /* Send interrupt_sequence to remote target. */ |
| static void |
| send_interrupt_sequence (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (interrupt_sequence_mode == interrupt_sequence_control_c) |
| remote_serial_write ("\x03", 1); |
| else if (interrupt_sequence_mode == interrupt_sequence_break) |
| serial_send_break (rs->remote_desc); |
| else if (interrupt_sequence_mode == interrupt_sequence_break_g) |
| { |
| serial_send_break (rs->remote_desc); |
| remote_serial_write ("g", 1); |
| } |
| else |
| internal_error (__FILE__, __LINE__, |
| _("Invalid value for interrupt_sequence_mode: %s."), |
| interrupt_sequence_mode); |
| } |
| |
| |
| /* If STOP_REPLY is a T stop reply, look for the "thread" register, |
| and extract the PTID. Returns NULL_PTID if not found. */ |
| |
| static ptid_t |
| stop_reply_extract_thread (char *stop_reply) |
| { |
| if (stop_reply[0] == 'T' && strlen (stop_reply) > 3) |
| { |
| char *p; |
| |
| /* Txx r:val ; r:val (...) */ |
| p = &stop_reply[3]; |
| |
| /* Look for "register" named "thread". */ |
| while (*p != '\0') |
| { |
| char *p1; |
| |
| p1 = strchr (p, ':'); |
| if (p1 == NULL) |
| return null_ptid; |
| |
| if (strncmp (p, "thread", p1 - p) == 0) |
| return read_ptid (++p1, &p); |
| |
| p1 = strchr (p, ';'); |
| if (p1 == NULL) |
| return null_ptid; |
| p1++; |
| |
| p = p1; |
| } |
| } |
| |
| return null_ptid; |
| } |
| |
| /* Determine the remote side's current thread. If we have a stop |
| reply handy (in WAIT_STATUS), maybe it's a T stop reply with a |
| "thread" register we can extract the current thread from. If not, |
| ask the remote which is the current thread with qC. The former |
| method avoids a roundtrip. */ |
| |
| static ptid_t |
| get_current_thread (char *wait_status) |
| { |
| ptid_t ptid = null_ptid; |
| |
| /* Note we don't use remote_parse_stop_reply as that makes use of |
| the target architecture, which we haven't yet fully determined at |
| this point. */ |
| if (wait_status != NULL) |
| ptid = stop_reply_extract_thread (wait_status); |
| if (ptid_equal (ptid, null_ptid)) |
| ptid = remote_current_thread (inferior_ptid); |
| |
| return ptid; |
| } |
| |
| /* Query the remote target for which is the current thread/process, |
| add it to our tables, and update INFERIOR_PTID. The caller is |
| responsible for setting the state such that the remote end is ready |
| to return the current thread. |
| |
| This function is called after handling the '?' or 'vRun' packets, |
| whose response is a stop reply from which we can also try |
| extracting the thread. If the target doesn't support the explicit |
| qC query, we infer the current thread from that stop reply, passed |
| in in WAIT_STATUS, which may be NULL. */ |
| |
| static void |
| add_current_inferior_and_thread (char *wait_status) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int fake_pid_p = 0; |
| ptid_t ptid; |
| |
| inferior_ptid = null_ptid; |
| |
| /* Now, if we have thread information, update inferior_ptid. */ |
| ptid = get_current_thread (wait_status); |
| |
| if (!ptid_equal (ptid, null_ptid)) |
| { |
| if (!remote_multi_process_p (rs)) |
| fake_pid_p = 1; |
| |
| inferior_ptid = ptid; |
| } |
| else |
| { |
| /* Without this, some commands which require an active target |
| (such as kill) won't work. This variable serves (at least) |
| double duty as both the pid of the target process (if it has |
| such), and as a flag indicating that a target is active. */ |
| inferior_ptid = magic_null_ptid; |
| fake_pid_p = 1; |
| } |
| |
| remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1, 1); |
| |
| /* Add the main thread. */ |
| add_thread_silent (inferior_ptid); |
| } |
| |
| /* Print info about a thread that was found already stopped on |
| connection. */ |
| |
| static void |
| print_one_stopped_thread (struct thread_info *thread) |
| { |
| struct target_waitstatus *ws = &thread->suspend.waitstatus; |
| |
| switch_to_thread (thread->ptid); |
| stop_pc = get_frame_pc (get_current_frame ()); |
| set_current_sal_from_frame (get_current_frame ()); |
| |
| thread->suspend.waitstatus_pending_p = 0; |
| |
| if (ws->kind == TARGET_WAITKIND_STOPPED) |
| { |
| enum gdb_signal sig = ws->value.sig; |
| |
| if (signal_print_state (sig)) |
| observer_notify_signal_received (sig); |
| } |
| observer_notify_normal_stop (NULL, 1); |
| } |
| |
| /* Process all initial stop replies the remote side sent in response |
| to the ? packet. These indicate threads that were already stopped |
| on initial connection. We mark these threads as stopped and print |
| their current frame before giving the user the prompt. */ |
| |
| static void |
| process_initial_stop_replies (int from_tty) |
| { |
| int pending_stop_replies = stop_reply_queue_length (); |
| struct inferior *inf; |
| struct thread_info *thread; |
| struct thread_info *selected = NULL; |
| struct thread_info *lowest_stopped = NULL; |
| struct thread_info *first = NULL; |
| |
| /* Consume the initial pending events. */ |
| while (pending_stop_replies-- > 0) |
| { |
| ptid_t waiton_ptid = minus_one_ptid; |
| ptid_t event_ptid; |
| struct target_waitstatus ws; |
| int ignore_event = 0; |
| struct thread_info *thread; |
| |
| memset (&ws, 0, sizeof (ws)); |
| event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG); |
| if (remote_debug) |
| print_target_wait_results (waiton_ptid, event_ptid, &ws); |
| |
| switch (ws.kind) |
| { |
| case TARGET_WAITKIND_IGNORE: |
| case TARGET_WAITKIND_NO_RESUMED: |
| case TARGET_WAITKIND_SIGNALLED: |
| case TARGET_WAITKIND_EXITED: |
| /* We shouldn't see these, but if we do, just ignore. */ |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n"); |
| ignore_event = 1; |
| break; |
| |
| case TARGET_WAITKIND_EXECD: |
| xfree (ws.value.execd_pathname); |
| break; |
| default: |
| break; |
| } |
| |
| if (ignore_event) |
| continue; |
| |
| thread = find_thread_ptid (event_ptid); |
| |
| if (ws.kind == TARGET_WAITKIND_STOPPED) |
| { |
| enum gdb_signal sig = ws.value.sig; |
| |
| /* Stubs traditionally report SIGTRAP as initial signal, |
| instead of signal 0. Suppress it. */ |
| if (sig == GDB_SIGNAL_TRAP) |
| sig = GDB_SIGNAL_0; |
| thread->suspend.stop_signal = sig; |
| ws.value.sig = sig; |
| } |
| |
| thread->suspend.waitstatus = ws; |
| |
| if (ws.kind != TARGET_WAITKIND_STOPPED |
| || ws.value.sig != GDB_SIGNAL_0) |
| thread->suspend.waitstatus_pending_p = 1; |
| |
| set_executing (event_ptid, 0); |
| set_running (event_ptid, 0); |
| } |
| |
| /* "Notice" the new inferiors before anything related to |
| registers/memory. */ |
| ALL_INFERIORS (inf) |
| { |
| if (inf->pid == 0) |
| continue; |
| |
| inf->needs_setup = 1; |
| |
| if (non_stop) |
| { |
| thread = any_live_thread_of_process (inf->pid); |
| notice_new_inferior (thread->ptid, |
| thread->state == THREAD_RUNNING, |
| from_tty); |
| } |
| } |
| |
| /* If all-stop on top of non-stop, pause all threads. Note this |
| records the threads' stop pc, so must be done after "noticing" |
| the inferiors. */ |
| if (!non_stop) |
| { |
| stop_all_threads (); |
| |
| /* If all threads of an inferior were already stopped, we |
| haven't setup the inferior yet. */ |
| ALL_INFERIORS (inf) |
| { |
| if (inf->pid == 0) |
| continue; |
| |
| if (inf->needs_setup) |
| { |
| thread = any_live_thread_of_process (inf->pid); |
| switch_to_thread_no_regs (thread); |
| setup_inferior (0); |
| } |
| } |
| } |
| |
| /* Now go over all threads that are stopped, and print their current |
| frame. If all-stop, then if there's a signalled thread, pick |
| that as current. */ |
| ALL_NON_EXITED_THREADS (thread) |
| { |
| if (first == NULL) |
| first = thread; |
| |
| if (!non_stop) |
| set_running (thread->ptid, 0); |
| else if (thread->state != THREAD_STOPPED) |
| continue; |
| |
| if (selected == NULL |
| && thread->suspend.waitstatus_pending_p) |
| selected = thread; |
| |
| if (lowest_stopped == NULL |
| || thread->inf->num < lowest_stopped->inf->num |
| || thread->per_inf_num < lowest_stopped->per_inf_num) |
| lowest_stopped = thread; |
| |
| if (non_stop) |
| print_one_stopped_thread (thread); |
| } |
| |
| /* In all-stop, we only print the status of one thread, and leave |
| others with their status pending. */ |
| if (!non_stop) |
| { |
| thread = selected; |
| if (thread == NULL) |
| thread = lowest_stopped; |
| if (thread == NULL) |
| thread = first; |
| |
| print_one_stopped_thread (thread); |
| } |
| |
| /* For "info program". */ |
| thread = inferior_thread (); |
| if (thread->state == THREAD_STOPPED) |
| set_last_target_status (inferior_ptid, thread->suspend.waitstatus); |
| } |
| |
| static void |
| remote_start_remote (int from_tty, struct target_ops *target, int extended_p) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct packet_config *noack_config; |
| char *wait_status = NULL; |
| |
| immediate_quit++; /* Allow user to interrupt it. */ |
| QUIT; |
| |
| if (interrupt_on_connect) |
| send_interrupt_sequence (); |
| |
| /* Ack any packet which the remote side has already sent. */ |
| serial_write (rs->remote_desc, "+", 1); |
| |
| /* Signal other parts that we're going through the initial setup, |
| and so things may not be stable yet. */ |
| rs->starting_up = 1; |
| |
| /* The first packet we send to the target is the optional "supported |
| packets" request. If the target can answer this, it will tell us |
| which later probes to skip. */ |
| remote_query_supported (); |
| |
| /* If the stub wants to get a QAllow, compose one and send it. */ |
| if (packet_support (PACKET_QAllow) != PACKET_DISABLE) |
| remote_set_permissions (target); |
| |
| /* Next, we possibly activate noack mode. |
| |
| If the QStartNoAckMode packet configuration is set to AUTO, |
| enable noack mode if the stub reported a wish for it with |
| qSupported. |
| |
| If set to TRUE, then enable noack mode even if the stub didn't |
| report it in qSupported. If the stub doesn't reply OK, the |
| session ends with an error. |
| |
| If FALSE, then don't activate noack mode, regardless of what the |
| stub claimed should be the default with qSupported. */ |
| |
| noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode]; |
| if (packet_config_support (noack_config) != PACKET_DISABLE) |
| { |
| putpkt ("QStartNoAckMode"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (packet_ok (rs->buf, noack_config) == PACKET_OK) |
| rs->noack_mode = 1; |
| } |
| |
| if (extended_p) |
| { |
| /* Tell the remote that we are using the extended protocol. */ |
| putpkt ("!"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| } |
| |
| /* Let the target know which signals it is allowed to pass down to |
| the program. */ |
| update_signals_program_target (); |
| |
| /* Next, if the target can specify a description, read it. We do |
| this before anything involving memory or registers. */ |
| target_find_description (); |
| |
| /* Next, now that we know something about the target, update the |
| address spaces in the program spaces. */ |
| update_address_spaces (); |
| |
| /* On OSs where the list of libraries is global to all |
| processes, we fetch them early. */ |
| if (gdbarch_has_global_solist (target_gdbarch ())) |
| solib_add (NULL, from_tty, target, auto_solib_add); |
| |
| if (target_is_non_stop_p ()) |
| { |
| if (packet_support (PACKET_QNonStop) != PACKET_ENABLE) |
| error (_("Non-stop mode requested, but remote " |
| "does not support non-stop")); |
| |
| putpkt ("QNonStop:1"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Remote refused setting non-stop mode with: %s"), rs->buf); |
| |
| /* Find about threads and processes the stub is already |
| controlling. We default to adding them in the running state. |
| The '?' query below will then tell us about which threads are |
| stopped. */ |
| remote_update_thread_list (target); |
| } |
| else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE) |
| { |
| /* Don't assume that the stub can operate in all-stop mode. |
| Request it explicitly. */ |
| putpkt ("QNonStop:0"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Remote refused setting all-stop mode with: %s"), rs->buf); |
| } |
| |
| /* Upload TSVs regardless of whether the target is running or not. The |
| remote stub, such as GDBserver, may have some predefined or builtin |
| TSVs, even if the target is not running. */ |
| if (remote_get_trace_status (target, current_trace_status ()) != -1) |
| { |
| struct uploaded_tsv *uploaded_tsvs = NULL; |
| |
| remote_upload_trace_state_variables (target, &uploaded_tsvs); |
| merge_uploaded_trace_state_variables (&uploaded_tsvs); |
| } |
| |
| /* Check whether the target is running now. */ |
| putpkt ("?"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (!target_is_non_stop_p ()) |
| { |
| if (rs->buf[0] == 'W' || rs->buf[0] == 'X') |
| { |
| if (!extended_p) |
| error (_("The target is not running (try extended-remote?)")); |
| |
| /* We're connected, but not running. Drop out before we |
| call start_remote. */ |
| rs->starting_up = 0; |
| return; |
| } |
| else |
| { |
| /* Save the reply for later. */ |
| wait_status = (char *) alloca (strlen (rs->buf) + 1); |
| strcpy (wait_status, rs->buf); |
| } |
| |
| /* Fetch thread list. */ |
| target_update_thread_list (); |
| |
| /* Let the stub know that we want it to return the thread. */ |
| set_continue_thread (minus_one_ptid); |
| |
| if (thread_count () == 0) |
| { |
| /* Target has no concept of threads at all. GDB treats |
| non-threaded target as single-threaded; add a main |
| thread. */ |
| add_current_inferior_and_thread (wait_status); |
| } |
| else |
| { |
| /* We have thread information; select the thread the target |
| says should be current. If we're reconnecting to a |
| multi-threaded program, this will ideally be the thread |
| that last reported an event before GDB disconnected. */ |
| inferior_ptid = get_current_thread (wait_status); |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| { |
| /* Odd... The target was able to list threads, but not |
| tell us which thread was current (no "thread" |
| register in T stop reply?). Just pick the first |
| thread in the thread list then. */ |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "warning: couldn't determine remote " |
| "current thread; picking first in list.\n"); |
| |
| inferior_ptid = thread_list->ptid; |
| } |
| } |
| |
| /* init_wait_for_inferior should be called before get_offsets in order |
| to manage `inserted' flag in bp loc in a correct state. |
| breakpoint_init_inferior, called from init_wait_for_inferior, set |
| `inserted' flag to 0, while before breakpoint_re_set, called from |
| start_remote, set `inserted' flag to 1. In the initialization of |
| inferior, breakpoint_init_inferior should be called first, and then |
| breakpoint_re_set can be called. If this order is broken, state of |
| `inserted' flag is wrong, and cause some problems on breakpoint |
| manipulation. */ |
| init_wait_for_inferior (); |
| |
| get_offsets (); /* Get text, data & bss offsets. */ |
| |
| /* If we could not find a description using qXfer, and we know |
| how to do it some other way, try again. This is not |
| supported for non-stop; it could be, but it is tricky if |
| there are no stopped threads when we connect. */ |
| if (remote_read_description_p (target) |
| && gdbarch_target_desc (target_gdbarch ()) == NULL) |
| { |
| target_clear_description (); |
| target_find_description (); |
| } |
| |
| /* Use the previously fetched status. */ |
| gdb_assert (wait_status != NULL); |
| strcpy (rs->buf, wait_status); |
| rs->cached_wait_status = 1; |
| |
| immediate_quit--; |
| start_remote (from_tty); /* Initialize gdb process mechanisms. */ |
| } |
| else |
| { |
| /* Clear WFI global state. Do this before finding about new |
| threads and inferiors, and setting the current inferior. |
| Otherwise we would clear the proceed status of the current |
| inferior when we want its stop_soon state to be preserved |
| (see notice_new_inferior). */ |
| init_wait_for_inferior (); |
| |
| /* In non-stop, we will either get an "OK", meaning that there |
| are no stopped threads at this time; or, a regular stop |
| reply. In the latter case, there may be more than one thread |
| stopped --- we pull them all out using the vStopped |
| mechanism. */ |
| if (strcmp (rs->buf, "OK") != 0) |
| { |
| struct notif_client *notif = ¬if_client_stop; |
| |
| /* remote_notif_get_pending_replies acks this one, and gets |
| the rest out. */ |
| rs->notif_state->pending_event[notif_client_stop.id] |
| = remote_notif_parse (notif, rs->buf); |
| remote_notif_get_pending_events (notif); |
| } |
| |
| if (thread_count () == 0) |
| { |
| if (!extended_p) |
| error (_("The target is not running (try extended-remote?)")); |
| |
| /* We're connected, but not running. Drop out before we |
| call start_remote. */ |
| rs->starting_up = 0; |
| return; |
| } |
| |
| /* In non-stop mode, any cached wait status will be stored in |
| the stop reply queue. */ |
| gdb_assert (wait_status == NULL); |
| |
| /* Report all signals during attach/startup. */ |
| remote_pass_signals (target, 0, NULL); |
| |
| /* If there are already stopped threads, mark them stopped and |
| report their stops before giving the prompt to the user. */ |
| process_initial_stop_replies (from_tty); |
| |
| if (target_can_async_p ()) |
| target_async (1); |
| } |
| |
| /* If we connected to a live target, do some additional setup. */ |
| if (target_has_execution) |
| { |
| if (symfile_objfile) /* No use without a symbol-file. */ |
| remote_check_symbols (); |
| } |
| |
| /* Possibly the target has been engaged in a trace run started |
| previously; find out where things are at. */ |
| if (remote_get_trace_status (target, current_trace_status ()) != -1) |
| { |
| struct uploaded_tp *uploaded_tps = NULL; |
| |
| if (current_trace_status ()->running) |
| printf_filtered (_("Trace is already running on the target.\n")); |
| |
| remote_upload_tracepoints (target, &uploaded_tps); |
| |
| merge_uploaded_tracepoints (&uploaded_tps); |
| } |
| |
| /* The thread and inferior lists are now synchronized with the |
| target, our symbols have been relocated, and we're merged the |
| target's tracepoints with ours. We're done with basic start |
| up. */ |
| rs->starting_up = 0; |
| |
| /* Maybe breakpoints are global and need to be inserted now. */ |
| if (breakpoints_should_be_inserted_now ()) |
| insert_breakpoints (); |
| } |
| |
| /* Open a connection to a remote debugger. |
| NAME is the filename used for communication. */ |
| |
| static void |
| remote_open (const char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &remote_ops, 0); |
| } |
| |
| /* Open a connection to a remote debugger using the extended |
| remote gdb protocol. NAME is the filename used for communication. */ |
| |
| static void |
| extended_remote_open (const char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */); |
| } |
| |
| /* Reset all packets back to "unknown support". Called when opening a |
| new connection to a remote target. */ |
| |
| static void |
| reset_all_packet_configs_support (void) |
| { |
| int i; |
| |
| for (i = 0; i < PACKET_MAX; i++) |
| remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; |
| } |
| |
| /* Initialize all packet configs. */ |
| |
| static void |
| init_all_packet_configs (void) |
| { |
| int i; |
| |
| for (i = 0; i < PACKET_MAX; i++) |
| { |
| remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO; |
| remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN; |
| } |
| } |
| |
| /* Symbol look-up. */ |
| |
| static void |
| remote_check_symbols (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *msg, *reply, *tmp; |
| int end; |
| struct cleanup *old_chain; |
| |
| /* The remote side has no concept of inferiors that aren't running |
| yet, it only knows about running processes. If we're connected |
| but our current inferior is not running, we should not invite the |
| remote target to request symbol lookups related to its |
| (unrelated) current process. */ |
| if (!target_has_execution) |
| return; |
| |
| if (packet_support (PACKET_qSymbol) == PACKET_DISABLE) |
| return; |
| |
| /* Make sure the remote is pointing at the right process. Note |
| there's no way to select "no process". */ |
| set_general_process (); |
| |
| /* Allocate a message buffer. We can't reuse the input buffer in RS, |
| because we need both at the same time. */ |
| msg = (char *) xmalloc (get_remote_packet_size ()); |
| old_chain = make_cleanup (xfree, msg); |
| |
| /* Invite target to request symbol lookups. */ |
| |
| putpkt ("qSymbol::"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]); |
| reply = rs->buf; |
| |
| while (startswith (reply, "qSymbol:")) |
| { |
| struct bound_minimal_symbol sym; |
| |
| tmp = &reply[8]; |
| end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2); |
| msg[end] = '\0'; |
| sym = lookup_minimal_symbol (msg, NULL, NULL); |
| if (sym.minsym == NULL) |
| xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]); |
| else |
| { |
| int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym); |
| |
| /* If this is a function address, return the start of code |
| instead of any data function descriptor. */ |
| sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (), |
| sym_addr, |
| ¤t_target); |
| |
| xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s", |
| phex_nz (sym_addr, addr_size), &reply[8]); |
| } |
| |
| putpkt (msg); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| reply = rs->buf; |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| static struct serial * |
| remote_serial_open (const char *name) |
| { |
| static int udp_warning = 0; |
| |
| /* FIXME: Parsing NAME here is a hack. But we want to warn here instead |
| of in ser-tcp.c, because it is the remote protocol assuming that the |
| serial connection is reliable and not the serial connection promising |
| to be. */ |
| if (!udp_warning && startswith (name, "udp:")) |
| { |
| warning (_("The remote protocol may be unreliable over UDP.\n" |
| "Some events may be lost, rendering further debugging " |
| "impossible.")); |
| udp_warning = 1; |
| } |
| |
| return serial_open (name); |
| } |
| |
| /* Inform the target of our permission settings. The permission flags |
| work without this, but if the target knows the settings, it can do |
| a couple things. First, it can add its own check, to catch cases |
| that somehow manage to get by the permissions checks in target |
| methods. Second, if the target is wired to disallow particular |
| settings (for instance, a system in the field that is not set up to |
| be able to stop at a breakpoint), it can object to any unavailable |
| permissions. */ |
| |
| void |
| remote_set_permissions (struct target_ops *self) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:" |
| "WriteReg:%x;WriteMem:%x;" |
| "InsertBreak:%x;InsertTrace:%x;" |
| "InsertFastTrace:%x;Stop:%x", |
| may_write_registers, may_write_memory, |
| may_insert_breakpoints, may_insert_tracepoints, |
| may_insert_fast_tracepoints, may_stop); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| /* If the target didn't like the packet, warn the user. Do not try |
| to undo the user's settings, that would just be maddening. */ |
| if (strcmp (rs->buf, "OK") != 0) |
| warning (_("Remote refused setting permissions with: %s"), rs->buf); |
| } |
| |
| /* This type describes each known response to the qSupported |
| packet. */ |
| struct protocol_feature |
| { |
| /* The name of this protocol feature. */ |
| const char *name; |
| |
| /* The default for this protocol feature. */ |
| enum packet_support default_support; |
| |
| /* The function to call when this feature is reported, or after |
| qSupported processing if the feature is not supported. |
| The first argument points to this structure. The second |
| argument indicates whether the packet requested support be |
| enabled, disabled, or probed (or the default, if this function |
| is being called at the end of processing and this feature was |
| not reported). The third argument may be NULL; if not NULL, it |
| is a NUL-terminated string taken from the packet following |
| this feature's name and an equals sign. */ |
| void (*func) (const struct protocol_feature *, enum packet_support, |
| const char *); |
| |
| /* The corresponding packet for this feature. Only used if |
| FUNC is remote_supported_packet. */ |
| int packet; |
| }; |
| |
| static void |
| remote_supported_packet (const struct protocol_feature *feature, |
| enum packet_support support, |
| const char *argument) |
| { |
| if (argument) |
| { |
| warning (_("Remote qSupported response supplied an unexpected value for" |
| " \"%s\"."), feature->name); |
| return; |
| } |
| |
| remote_protocol_packets[feature->packet].support = support; |
| } |
| |
| static void |
| remote_packet_size (const struct protocol_feature *feature, |
| enum packet_support support, const char *value) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| int packet_size; |
| char *value_end; |
| |
| if (support != PACKET_ENABLE) |
| return; |
| |
| if (value == NULL || *value == '\0') |
| { |
| warning (_("Remote target reported \"%s\" without a size."), |
| feature->name); |
| return; |
| } |
| |
| errno = 0; |
| packet_size = strtol (value, &value_end, 16); |
| if (errno != 0 || *value_end != '\0' || packet_size < 0) |
| { |
| warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."), |
| feature->name, value); |
| return; |
| } |
| |
| /* Record the new maximum packet size. */ |
| rs->explicit_packet_size = packet_size; |
| } |
| |
| static const struct protocol_feature remote_protocol_features[] = { |
| { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 }, |
| { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_auxv }, |
| { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_exec_file }, |
| { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_features }, |
| { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_libraries }, |
| { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_libraries_svr4 }, |
| { "augmented-libraries-svr4-read", PACKET_DISABLE, |
| remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature }, |
| { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_memory_map }, |
| { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_spu_read }, |
| { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_spu_write }, |
| { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_osdata }, |
| { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_threads }, |
| { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_traceframe_info }, |
| { "QPassSignals", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QPassSignals }, |
| { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QCatchSyscalls }, |
| { "QProgramSignals", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QProgramSignals }, |
| { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QStartNoAckMode }, |
| { "multiprocess", PACKET_DISABLE, remote_supported_packet, |
| PACKET_multiprocess_feature }, |
| { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop }, |
| { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_siginfo_read }, |
| { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_siginfo_write }, |
| { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet, |
| PACKET_ConditionalTracepoints }, |
| { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet, |
| PACKET_ConditionalBreakpoints }, |
| { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet, |
| PACKET_BreakpointCommands }, |
| { "FastTracepoints", PACKET_DISABLE, remote_supported_packet, |
| PACKET_FastTracepoints }, |
| { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet, |
| PACKET_StaticTracepoints }, |
| {"InstallInTrace", PACKET_DISABLE, remote_supported_packet, |
| PACKET_InstallInTrace}, |
| { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet, |
| PACKET_DisconnectedTracing_feature }, |
| { "ReverseContinue", PACKET_DISABLE, remote_supported_packet, |
| PACKET_bc }, |
| { "ReverseStep", PACKET_DISABLE, remote_supported_packet, |
| PACKET_bs }, |
| { "TracepointSource", PACKET_DISABLE, remote_supported_packet, |
| PACKET_TracepointSource }, |
| { "QAllow", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QAllow }, |
| { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet, |
| PACKET_EnableDisableTracepoints_feature }, |
| { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_fdpic }, |
| { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_uib }, |
| { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet, |
| PACKET_QDisableRandomization }, |
| { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent}, |
| { "QTBuffer:size", PACKET_DISABLE, |
| remote_supported_packet, PACKET_QTBuffer_size}, |
| { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature }, |
| { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off }, |
| { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts }, |
| { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt }, |
| { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_btrace }, |
| { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet, |
| PACKET_qXfer_btrace_conf }, |
| { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet, |
| PACKET_Qbtrace_conf_bts_size }, |
| { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature }, |
| { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature }, |
| { "fork-events", PACKET_DISABLE, remote_supported_packet, |
| PACKET_fork_event_feature }, |
| { "vfork-events", PACKET_DISABLE, remote_supported_packet, |
| PACKET_vfork_event_feature }, |
| { "exec-events", PACKET_DISABLE, remote_supported_packet, |
| PACKET_exec_event_feature }, |
| { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet, |
| PACKET_Qbtrace_conf_pt_size }, |
| { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported }, |
| { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents }, |
| { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed }, |
| }; |
| |
| static char *remote_support_xml; |
| |
| /* Register string appended to "xmlRegisters=" in qSupported query. */ |
| |
| void |
| register_remote_support_xml (const char *xml) |
| { |
| #if defined(HAVE_LIBEXPAT) |
| if (remote_support_xml == NULL) |
| remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL); |
| else |
| { |
| char *copy = xstrdup (remote_support_xml + 13); |
| char *p = strtok (copy, ","); |
| |
| do |
| { |
| if (strcmp (p, xml) == 0) |
| { |
| /* already there */ |
| xfree (copy); |
| return; |
| } |
| } |
| while ((p = strtok (NULL, ",")) != NULL); |
| xfree (copy); |
| |
| remote_support_xml = reconcat (remote_support_xml, |
| remote_support_xml, ",", xml, |
| (char *) NULL); |
| } |
| #endif |
| } |
| |
| static char * |
| remote_query_supported_append (char *msg, const char *append) |
| { |
| if (msg) |
| return reconcat (msg, msg, ";", append, (char *) NULL); |
| else |
| return xstrdup (append); |
| } |
| |
| static void |
| remote_query_supported (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *next; |
| int i; |
| unsigned char seen [ARRAY_SIZE (remote_protocol_features)]; |
| |
| /* The packet support flags are handled differently for this packet |
| than for most others. We treat an error, a disabled packet, and |
| an empty response identically: any features which must be reported |
| to be used will be automatically disabled. An empty buffer |
| accomplishes this, since that is also the representation for a list |
| containing no features. */ |
| |
| rs->buf[0] = 0; |
| if (packet_support (PACKET_qSupported) != PACKET_DISABLE) |
| { |
| char *q = NULL; |
| struct cleanup *old_chain = make_cleanup (free_current_contents, &q); |
| |
| if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "multiprocess+"); |
| |
| if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "swbreak+"); |
| if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "hwbreak+"); |
| |
| q = remote_query_supported_append (q, "qRelocInsn+"); |
| |
| if (packet_set_cmd_state (PACKET_fork_event_feature) |
| != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "fork-events+"); |
| if (packet_set_cmd_state (PACKET_vfork_event_feature) |
| != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "vfork-events+"); |
| if (packet_set_cmd_state (PACKET_exec_event_feature) |
| != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "exec-events+"); |
| |
| if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "vContSupported+"); |
| |
| if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "QThreadEvents+"); |
| |
| if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE) |
| q = remote_query_supported_append (q, "no-resumed+"); |
| |
| /* Keep this one last to work around a gdbserver <= 7.10 bug in |
| the qSupported:xmlRegisters=i386 handling. */ |
| if (remote_support_xml != NULL) |
| q = remote_query_supported_append (q, remote_support_xml); |
| |
| q = reconcat (q, "qSupported:", q, (char *) NULL); |
| putpkt (q); |
| |
| do_cleanups (old_chain); |
| |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| /* If an error occured, warn, but do not return - just reset the |
| buffer to empty and go on to disable features. */ |
| if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported]) |
| == PACKET_ERROR) |
| { |
| warning (_("Remote failure reply: %s"), rs->buf); |
| rs->buf[0] = 0; |
| } |
| } |
| |
| memset (seen, 0, sizeof (seen)); |
| |
| next = rs->buf; |
| while (*next) |
| { |
| enum packet_support is_supported; |
| char *p, *end, *name_end, *value; |
| |
| /* First separate out this item from the rest of the packet. If |
| there's another item after this, we overwrite the separator |
| (terminated strings are much easier to work with). */ |
| p = next; |
| end = strchr (p, ';'); |
| if (end == NULL) |
| { |
| end = p + strlen (p); |
| next = end; |
| } |
| else |
| { |
| *end = '\0'; |
| next = end + 1; |
| |
| if (end == p) |
| { |
| warning (_("empty item in \"qSupported\" response")); |
| continue; |
| } |
| } |
| |
| name_end = strchr (p, '='); |
| if (name_end) |
| { |
| /* This is a name=value entry. */ |
| is_supported = PACKET_ENABLE; |
| value = name_end + 1; |
| *name_end = '\0'; |
| } |
| else |
| { |
| value = NULL; |
| switch (end[-1]) |
| { |
| case '+': |
| is_supported = PACKET_ENABLE; |
| break; |
| |
| case '-': |
| is_supported = PACKET_DISABLE; |
| break; |
| |
| case '?': |
| is_supported = PACKET_SUPPORT_UNKNOWN; |
| break; |
| |
| default: |
| warning (_("unrecognized item \"%s\" " |
| "in \"qSupported\" response"), p); |
| continue; |
| } |
| end[-1] = '\0'; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| if (strcmp (remote_protocol_features[i].name, p) == 0) |
| { |
| const struct protocol_feature *feature; |
| |
| seen[i] = 1; |
| feature = &remote_protocol_features[i]; |
| feature->func (feature, is_supported, value); |
| break; |
| } |
| } |
| |
| /* If we increased the packet size, make sure to increase the global |
| buffer size also. We delay this until after parsing the entire |
| qSupported packet, because this is the same buffer we were |
| parsing. */ |
| if (rs->buf_size < rs->explicit_packet_size) |
| { |
| rs->buf_size = rs->explicit_packet_size; |
| rs->buf = (char *) xrealloc (rs->buf, rs->buf_size); |
| } |
| |
| /* Handle the defaults for unmentioned features. */ |
| for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) |
| if (!seen[i]) |
| { |
| const struct protocol_feature *feature; |
| |
| feature = &remote_protocol_features[i]; |
| feature->func (feature, feature->default_support, NULL); |
| } |
| } |
| |
| /* Remove any of the remote.c targets from target stack. Upper targets depend |
| on it so remove them first. */ |
| |
| static void |
| remote_unpush_target (void) |
| { |
| pop_all_targets_at_and_above (process_stratum); |
| } |
| |
| static void |
| remote_open_1 (const char *name, int from_tty, |
| struct target_ops *target, int extended_p) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (name == 0) |
| error (_("To open a remote debug connection, you need to specify what\n" |
| "serial device is attached to the remote system\n" |
| "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).")); |
| |
| /* See FIXME above. */ |
| if (!target_async_permitted) |
| wait_forever_enabled_p = 1; |
| |
| /* If we're connected to a running target, target_preopen will kill it. |
| Ask this question first, before target_preopen has a chance to kill |
| anything. */ |
| if (rs->remote_desc != NULL && !have_inferiors ()) |
| { |
| if (from_tty |
| && !query (_("Already connected to a remote target. Disconnect? "))) |
| error (_("Still connected.")); |
| } |
| |
| /* Here the possibly existing remote target gets unpushed. */ |
| target_preopen (from_tty); |
| |
| /* Make sure we send the passed signals list the next time we resume. */ |
| xfree (rs->last_pass_packet); |
| rs->last_pass_packet = NULL; |
| |
| /* Make sure we send the program signals list the next time we |
| resume. */ |
| xfree (rs->last_program_signals_packet); |
| rs->last_program_signals_packet = NULL; |
| |
| remote_fileio_reset (); |
| reopen_exec_file (); |
| reread_symbols (); |
| |
| rs->remote_desc = remote_serial_open (name); |
| if (!rs->remote_desc) |
| perror_with_name (name); |
| |
| if (baud_rate != -1) |
| { |
| if (serial_setbaudrate (rs->remote_desc, baud_rate)) |
| { |
| /* The requested speed could not be set. Error out to |
| top level after closing remote_desc. Take care to |
| set remote_desc to NULL to avoid closing remote_desc |
| more than once. */ |
| serial_close (rs->remote_desc); |
| rs->remote_desc = NULL; |
| perror_with_name (name); |
| } |
| } |
| |
| serial_setparity (rs->remote_desc, serial_parity); |
| serial_raw (rs->remote_desc); |
| |
| /* If there is something sitting in the buffer we might take it as a |
| response to a command, which would be bad. */ |
| serial_flush_input (rs->remote_desc); |
| |
| if (from_tty) |
| { |
| puts_filtered ("Remote debugging using "); |
| puts_filtered (name); |
| puts_filtered ("\n"); |
| } |
| push_target (target); /* Switch to using remote target now. */ |
| |
| /* Register extra event sources in the event loop. */ |
| remote_async_inferior_event_token |
| = create_async_event_handler (remote_async_inferior_event_handler, |
| NULL); |
| rs->notif_state = remote_notif_state_allocate (); |
| |
| /* Reset the target state; these things will be queried either by |
| remote_query_supported or as they are needed. */ |
| reset_all_packet_configs_support (); |
| rs->cached_wait_status = 0; |
| rs->explicit_packet_size = 0; |
| rs->noack_mode = 0; |
| rs->extended = extended_p; |
| rs->waiting_for_stop_reply = 0; |
| rs->ctrlc_pending_p = 0; |
| |
| rs->general_thread = not_sent_ptid; |
| rs->continue_thread = not_sent_ptid; |
| rs->remote_traceframe_number = -1; |
| |
| /* Probe for ability to use "ThreadInfo" query, as required. */ |
| rs->use_threadinfo_query = 1; |
| rs->use_threadextra_query = 1; |
| |
| readahead_cache_invalidate (); |
| |
| if (target_async_permitted) |
| { |
| /* With this target we start out by owning the terminal. */ |
| remote_async_terminal_ours_p = 1; |
| |
| /* FIXME: cagney/1999-09-23: During the initial connection it is |
| assumed that the target is already ready and able to respond to |
| requests. Unfortunately remote_start_remote() eventually calls |
| wait_for_inferior() with no timeout. wait_forever_enabled_p gets |
| around this. Eventually a mechanism that allows |
| wait_for_inferior() to expect/get timeouts will be |
| implemented. */ |
| wait_forever_enabled_p = 0; |
| } |
| |
| /* First delete any symbols previously loaded from shared libraries. */ |
| no_shared_libraries (NULL, 0); |
| |
| /* Start afresh. */ |
| init_thread_list (); |
| |
| /* Start the remote connection. If error() or QUIT, discard this |
| target (we'd otherwise be in an inconsistent state) and then |
| propogate the error on up the exception chain. This ensures that |
| the caller doesn't stumble along blindly assuming that the |
| function succeeded. The CLI doesn't have this problem but other |
| UI's, such as MI do. |
| |
| FIXME: cagney/2002-05-19: Instead of re-throwing the exception, |
| this function should return an error indication letting the |
| caller restore the previous state. Unfortunately the command |
| ``target remote'' is directly wired to this function making that |
| impossible. On a positive note, the CLI side of this problem has |
| been fixed - the function set_cmd_context() makes it possible for |
| all the ``target ....'' commands to share a common callback |
| function. See cli-dump.c. */ |
| { |
| |
| TRY |
| { |
| remote_start_remote (from_tty, target, extended_p); |
| } |
| CATCH (ex, RETURN_MASK_ALL) |
| { |
| /* Pop the partially set up target - unless something else did |
| already before throwing the exception. */ |
| if (rs->remote_desc != NULL) |
| remote_unpush_target (); |
| if (target_async_permitted) |
| wait_forever_enabled_p = 1; |
| throw_exception (ex); |
| } |
| END_CATCH |
| } |
| |
| remote_btrace_reset (); |
| |
| if (target_async_permitted) |
| wait_forever_enabled_p = 1; |
| } |
| |
| /* Detach the specified process. */ |
| |
| static void |
| remote_detach_pid (int pid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (remote_multi_process_p (rs)) |
| xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid); |
| else |
| strcpy (rs->buf, "D"); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (rs->buf[0] == 'O' && rs->buf[1] == 'K') |
| ; |
| else if (rs->buf[0] == '\0') |
| error (_("Remote doesn't know how to detach")); |
| else |
| error (_("Can't detach process.")); |
| } |
| |
| /* This detaches a program to which we previously attached, using |
| inferior_ptid to identify the process. After this is done, GDB |
| can be used to debug some other program. We better not have left |
| any breakpoints in the target program or it'll die when it hits |
| one. */ |
| |
| static void |
| remote_detach_1 (const char *args, int from_tty) |
| { |
| int pid = ptid_get_pid (inferior_ptid); |
| struct remote_state *rs = get_remote_state (); |
| struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| int is_fork_parent; |
| |
| if (args) |
| error (_("Argument given to \"detach\" when remotely debugging.")); |
| |
| if (!target_has_execution) |
| error (_("No process to detach from.")); |
| |
| if (from_tty) |
| { |
| char *exec_file = get_exec_file (0); |
| if (exec_file == NULL) |
| exec_file = ""; |
| printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
| target_pid_to_str (pid_to_ptid (pid))); |
| gdb_flush (gdb_stdout); |
| } |
| |
| /* Tell the remote target to detach. */ |
| remote_detach_pid (pid); |
| |
| /* Exit only if this is the only active inferior. */ |
| if (from_tty && !rs->extended && number_of_live_inferiors () == 1) |
| puts_filtered (_("Ending remote debugging.\n")); |
| |
| /* Check to see if we are detaching a fork parent. Note that if we |
| are detaching a fork child, tp == NULL. */ |
| is_fork_parent = (tp != NULL |
| && tp->pending_follow.kind == TARGET_WAITKIND_FORKED); |
| |
| /* If doing detach-on-fork, we don't mourn, because that will delete |
| breakpoints that should be available for the followed inferior. */ |
| if (!is_fork_parent) |
| target_mourn_inferior (); |
| else |
| { |
| inferior_ptid = null_ptid; |
| detach_inferior (pid); |
| } |
| } |
| |
| static void |
| remote_detach (struct target_ops *ops, const char *args, int from_tty) |
| { |
| remote_detach_1 (args, from_tty); |
| } |
| |
| static void |
| extended_remote_detach (struct target_ops *ops, const char *args, int from_tty) |
| { |
| remote_detach_1 (args, from_tty); |
| } |
| |
| /* Target follow-fork function for remote targets. On entry, and |
| at return, the current inferior is the fork parent. |
| |
| Note that although this is currently only used for extended-remote, |
| it is named remote_follow_fork in anticipation of using it for the |
| remote target as well. */ |
| |
| static int |
| remote_follow_fork (struct target_ops *ops, int follow_child, |
| int detach_fork) |
| { |
| struct remote_state *rs = get_remote_state (); |
| enum target_waitkind kind = inferior_thread ()->pending_follow.kind; |
| |
| if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs)) |
| || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs))) |
| { |
| /* When following the parent and detaching the child, we detach |
| the child here. For the case of following the child and |
| detaching the parent, the detach is done in the target- |
| independent follow fork code in infrun.c. We can't use |
| target_detach when detaching an unfollowed child because |
| the client side doesn't know anything about the child. */ |
| if (detach_fork && !follow_child) |
| { |
| /* Detach the fork child. */ |
| ptid_t child_ptid; |
| pid_t child_pid; |
| |
| child_ptid = inferior_thread ()->pending_follow.value.related_pid; |
| child_pid = ptid_get_pid (child_ptid); |
| |
| remote_detach_pid (child_pid); |
| detach_inferior (child_pid); |
| } |
| } |
| return 0; |
| } |
| |
| /* Target follow-exec function for remote targets. Save EXECD_PATHNAME |
| in the program space of the new inferior. On entry and at return the |
| current inferior is the exec'ing inferior. INF is the new exec'd |
| inferior, which may be the same as the exec'ing inferior unless |
| follow-exec-mode is "new". */ |
| |
| static void |
| remote_follow_exec (struct target_ops *ops, |
| struct inferior *inf, char *execd_pathname) |
| { |
| /* We know that this is a target file name, so if it has the "target:" |
| prefix we strip it off before saving it in the program space. */ |
| if (is_target_filename (execd_pathname)) |
| execd_pathname += strlen (TARGET_SYSROOT_PREFIX); |
| |
| set_pspace_remote_exec_file (inf->pspace, execd_pathname); |
| } |
| |
| /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ |
| |
| static void |
| remote_disconnect (struct target_ops *target, const char *args, int from_tty) |
| { |
| if (args) |
| error (_("Argument given to \"disconnect\" when remotely debugging.")); |
| |
| /* Make sure we unpush even the extended remote targets. Calling |
| target_mourn_inferior won't unpush, and remote_mourn won't |
| unpush if there is more than one inferior left. */ |
| unpush_target (target); |
| generic_mourn_inferior (); |
| |
| if (from_tty) |
| puts_filtered ("Ending remote debugging.\n"); |
| } |
| |
| /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, |
| be chatty about it. */ |
| |
| static void |
| extended_remote_attach (struct target_ops *target, const char *args, |
| int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int pid; |
| char *wait_status = NULL; |
| |
| pid = parse_pid_to_attach (args); |
| |
| /* Remote PID can be freely equal to getpid, do not check it here the same |
| way as in other targets. */ |
| |
| if (packet_support (PACKET_vAttach) == PACKET_DISABLE) |
| error (_("This target does not support attaching to a process")); |
| |
| if (from_tty) |
| { |
| char *exec_file = get_exec_file (0); |
| |
| if (exec_file) |
| printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, |
| target_pid_to_str (pid_to_ptid (pid))); |
| else |
| printf_unfiltered (_("Attaching to %s\n"), |
| target_pid_to_str (pid_to_ptid (pid))); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_vAttach])) |
| { |
| case PACKET_OK: |
| if (!target_is_non_stop_p ()) |
| { |
| /* Save the reply for later. */ |
| wait_status = (char *) alloca (strlen (rs->buf) + 1); |
| strcpy (wait_status, rs->buf); |
| } |
| else if (strcmp (rs->buf, "OK") != 0) |
| error (_("Attaching to %s failed with: %s"), |
| target_pid_to_str (pid_to_ptid (pid)), |
| rs->buf); |
| break; |
| case PACKET_UNKNOWN: |
| error (_("This target does not support attaching to a process")); |
| default: |
| error (_("Attaching to %s failed"), |
| target_pid_to_str (pid_to_ptid (pid))); |
| } |
| |
| set_current_inferior (remote_add_inferior (0, pid, 1, 0)); |
| |
| inferior_ptid = pid_to_ptid (pid); |
| |
| if (target_is_non_stop_p ()) |
| { |
| struct thread_info *thread; |
| |
| /* Get list of threads. */ |
| remote_update_thread_list (target); |
| |
| thread = first_thread_of_process (pid); |
| if (thread) |
| inferior_ptid = thread->ptid; |
| else |
| inferior_ptid = pid_to_ptid (pid); |
| |
| /* Invalidate our notion of the remote current thread. */ |
| record_currthread (rs, minus_one_ptid); |
| } |
| else |
| { |
| /* Now, if we have thread information, update inferior_ptid. */ |
| inferior_ptid = remote_current_thread (inferior_ptid); |
| |
| /* Add the main thread to the thread list. */ |
| add_thread_silent (inferior_ptid); |
| } |
| |
| /* Next, if the target can specify a description, read it. We do |
| this before anything involving memory or registers. */ |
| target_find_description (); |
| |
| if (!target_is_non_stop_p ()) |
| { |
| /* Use the previously fetched status. */ |
| gdb_assert (wait_status != NULL); |
| |
| if (target_can_async_p ()) |
| { |
| struct notif_event *reply |
| = remote_notif_parse (¬if_client_stop, wait_status); |
| |
| push_stop_reply ((struct stop_reply *) reply); |
| |
| target_async (1); |
| } |
| else |
| { |
| gdb_assert (wait_status != NULL); |
| strcpy (rs->buf, wait_status); |
| rs->cached_wait_status = 1; |
| } |
| } |
| else |
| gdb_assert (wait_status == NULL); |
| } |
| |
| /* Implementation of the to_post_attach method. */ |
| |
| static void |
| extended_remote_post_attach (struct target_ops *ops, int pid) |
| { |
| /* Get text, data & bss offsets. */ |
| get_offsets (); |
| |
| /* In certain cases GDB might not have had the chance to start |
| symbol lookup up until now. This could happen if the debugged |
| binary is not using shared libraries, the vsyscall page is not |
| present (on Linux) and the binary itself hadn't changed since the |
| debugging process was started. */ |
| if (symfile_objfile != NULL) |
| remote_check_symbols(); |
| } |
| |
| |
| /* Check for the availability of vCont. This function should also check |
| the response. */ |
| |
| static void |
| remote_vcont_probe (struct remote_state *rs) |
| { |
| char *buf; |
| |
| strcpy (rs->buf, "vCont?"); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| buf = rs->buf; |
| |
| /* Make sure that the features we assume are supported. */ |
| if (startswith (buf, "vCont")) |
| { |
| char *p = &buf[5]; |
| int support_c, support_C; |
| |
| rs->supports_vCont.s = 0; |
| rs->supports_vCont.S = 0; |
| support_c = 0; |
| support_C = 0; |
| rs->supports_vCont.t = 0; |
| rs->supports_vCont.r = 0; |
| while (p && *p == ';') |
| { |
| p++; |
| if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| rs->supports_vCont.s = 1; |
| else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| rs->supports_vCont.S = 1; |
| else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| support_c = 1; |
| else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| support_C = 1; |
| else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| rs->supports_vCont.t = 1; |
| else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| rs->supports_vCont.r = 1; |
| |
| p = strchr (p, ';'); |
| } |
| |
| /* If c, and C are not all supported, we can't use vCont. Clearing |
| BUF will make packet_ok disable the packet. */ |
| if (!support_c || !support_C) |
| buf[0] = 0; |
| } |
| |
| packet_ok (buf, &remote_protocol_packets[PACKET_vCont]); |
| } |
| |
| /* Helper function for building "vCont" resumptions. Write a |
| resumption to P. ENDP points to one-passed-the-end of the buffer |
| we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The |
| thread to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| resumed thread should be single-stepped and/or signalled. If PTID |
| equals minus_one_ptid, then all threads are resumed; if PTID |
| represents a process, then all threads of the process are resumed; |
| the thread to be stepped and/or signalled is given in the global |
| INFERIOR_PTID. */ |
| |
| static char * |
| append_resumption (char *p, char *endp, |
| ptid_t ptid, int step, enum gdb_signal siggnal) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (step && siggnal != GDB_SIGNAL_0) |
| p += xsnprintf (p, endp - p, ";S%02x", siggnal); |
| else if (step |
| /* GDB is willing to range step. */ |
| && use_range_stepping |
| /* Target supports range stepping. */ |
| && rs->supports_vCont.r |
| /* We don't currently support range stepping multiple |
| threads with a wildcard (though the protocol allows it, |
| so stubs shouldn't make an active effort to forbid |
| it). */ |
| && !(remote_multi_process_p (rs) && ptid_is_pid (ptid))) |
| { |
| struct thread_info *tp; |
| |
| if (ptid_equal (ptid, minus_one_ptid)) |
| { |
| /* If we don't know about the target thread's tid, then |
| we're resuming magic_null_ptid (see caller). */ |
| tp = find_thread_ptid (magic_null_ptid); |
| } |
| else |
| tp = find_thread_ptid (ptid); |
| gdb_assert (tp != NULL); |
| |
| if (tp->control.may_range_step) |
| { |
| int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| |
| p += xsnprintf (p, endp - p, ";r%s,%s", |
| phex_nz (tp->control.step_range_start, |
| addr_size), |
| phex_nz (tp->control.step_range_end, |
| addr_size)); |
| } |
| else |
| p += xsnprintf (p, endp - p, ";s"); |
| } |
| else if (step) |
| p += xsnprintf (p, endp - p, ";s"); |
| else if (siggnal != GDB_SIGNAL_0) |
| p += xsnprintf (p, endp - p, ";C%02x", siggnal); |
| else |
| p += xsnprintf (p, endp - p, ";c"); |
| |
| if (remote_multi_process_p (rs) && ptid_is_pid (ptid)) |
| { |
| ptid_t nptid; |
| |
| /* All (-1) threads of process. */ |
| nptid = ptid_build (ptid_get_pid (ptid), -1, 0); |
| |
| p += xsnprintf (p, endp - p, ":"); |
| p = write_ptid (p, endp, nptid); |
| } |
| else if (!ptid_equal (ptid, minus_one_ptid)) |
| { |
| p += xsnprintf (p, endp - p, ":"); |
| p = write_ptid (p, endp, ptid); |
| } |
| |
| return p; |
| } |
| |
| /* Clear the thread's private info on resume. */ |
| |
| static void |
| resume_clear_thread_private_info (struct thread_info *thread) |
| { |
| if (thread->priv != NULL) |
| { |
| thread->priv->stop_reason = TARGET_STOPPED_BY_NO_REASON; |
| thread->priv->watch_data_address = 0; |
| } |
| } |
| |
| /* Append a vCont continue-with-signal action for threads that have a |
| non-zero stop signal. */ |
| |
| static char * |
| append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid) |
| { |
| struct thread_info *thread; |
| |
| ALL_NON_EXITED_THREADS (thread) |
| if (ptid_match (thread->ptid, ptid) |
| && !ptid_equal (inferior_ptid, thread->ptid) |
| && thread->suspend.stop_signal != GDB_SIGNAL_0) |
| { |
| p = append_resumption (p, endp, thread->ptid, |
| 0, thread->suspend.stop_signal); |
| thread->suspend.stop_signal = GDB_SIGNAL_0; |
| resume_clear_thread_private_info (thread); |
| } |
| |
| return p; |
| } |
| |
| /* Resume the remote inferior by using a "vCont" packet. The thread |
| to be resumed is PTID; STEP and SIGGNAL indicate whether the |
| resumed thread should be single-stepped and/or signalled. If PTID |
| equals minus_one_ptid, then all threads are resumed; the thread to |
| be stepped and/or signalled is given in the global INFERIOR_PTID. |
| This function returns non-zero iff it resumes the inferior. |
| |
| This function issues a strict subset of all possible vCont commands at the |
| moment. */ |
| |
| static int |
| remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p; |
| char *endp; |
| |
| if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| remote_vcont_probe (rs); |
| |
| if (packet_support (PACKET_vCont) == PACKET_DISABLE) |
| return 0; |
| |
| p = rs->buf; |
| endp = rs->buf + get_remote_packet_size (); |
| |
| /* If we could generate a wider range of packets, we'd have to worry |
| about overflowing BUF. Should there be a generic |
| "multi-part-packet" packet? */ |
| |
| p += xsnprintf (p, endp - p, "vCont"); |
| |
| if (ptid_equal (ptid, magic_null_ptid)) |
| { |
| /* MAGIC_NULL_PTID means that we don't have any active threads, |
| so we don't have any TID numbers the inferior will |
| understand. Make sure to only send forms that do not specify |
| a TID. */ |
| append_resumption (p, endp, minus_one_ptid, step, siggnal); |
| } |
| else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid)) |
| { |
| /* Resume all threads (of all processes, or of a single |
| process), with preference for INFERIOR_PTID. This assumes |
| inferior_ptid belongs to the set of all threads we are about |
| to resume. */ |
| if (step || siggnal != GDB_SIGNAL_0) |
| { |
| /* Step inferior_ptid, with or without signal. */ |
| p = append_resumption (p, endp, inferior_ptid, step, siggnal); |
| } |
| |
| /* Also pass down any pending signaled resumption for other |
| threads not the current. */ |
| p = append_pending_thread_resumptions (p, endp, ptid); |
| |
| /* And continue others without a signal. */ |
| append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0); |
| } |
| else |
| { |
| /* Scheduler locking; resume only PTID. */ |
| append_resumption (p, endp, ptid, step, siggnal); |
| } |
| |
| gdb_assert (strlen (rs->buf) < get_remote_packet_size ()); |
| putpkt (rs->buf); |
| |
| if (target_is_non_stop_p ()) |
| { |
| /* In non-stop, the stub replies to vCont with "OK". The stop |
| reply will be reported asynchronously by means of a `%Stop' |
| notification. */ |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf); |
| } |
| |
| return 1; |
| } |
| |
| /* Tell the remote machine to resume. */ |
| |
| static void |
| remote_resume (struct target_ops *ops, |
| ptid_t ptid, int step, enum gdb_signal siggnal) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf; |
| struct thread_info *thread; |
| |
| /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN |
| (explained in remote-notif.c:handle_notification) so |
| remote_notif_process is not called. We need find a place where |
| it is safe to start a 'vNotif' sequence. It is good to do it |
| before resuming inferior, because inferior was stopped and no RSP |
| traffic at that moment. */ |
| if (!target_is_non_stop_p ()) |
| remote_notif_process (rs->notif_state, ¬if_client_stop); |
| |
| rs->last_sent_signal = siggnal; |
| rs->last_sent_step = step; |
| |
| /* The vCont packet doesn't need to specify threads via Hc. */ |
| /* No reverse support (yet) for vCont. */ |
| if (execution_direction != EXEC_REVERSE) |
| if (remote_vcont_resume (ptid, step, siggnal)) |
| goto done; |
| |
| /* All other supported resume packets do use Hc, so set the continue |
| thread. */ |
| if (ptid_equal (ptid, minus_one_ptid)) |
| set_continue_thread (any_thread_ptid); |
| else |
| set_continue_thread (ptid); |
| |
| ALL_NON_EXITED_THREADS (thread) |
| resume_clear_thread_private_info (thread); |
| |
| buf = rs->buf; |
| if (execution_direction == EXEC_REVERSE) |
| { |
| /* We don't pass signals to the target in reverse exec mode. */ |
| if (info_verbose && siggnal != GDB_SIGNAL_0) |
| warning (_(" - Can't pass signal %d to target in reverse: ignored."), |
| siggnal); |
| |
| if (step && packet_support (PACKET_bs) == PACKET_DISABLE) |
| error (_("Remote reverse-step not supported.")); |
| if (!step && packet_support (PACKET_bc) == PACKET_DISABLE) |
| error (_("Remote reverse-continue not supported.")); |
| |
| strcpy (buf, step ? "bs" : "bc"); |
| } |
| else if (siggnal != GDB_SIGNAL_0) |
| { |
| buf[0] = step ? 'S' : 'C'; |
| buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
| buf[2] = tohex (((int) siggnal) & 0xf); |
| buf[3] = '\0'; |
| } |
| else |
| strcpy (buf, step ? "s" : "c"); |
| |
| putpkt (buf); |
| |
| done: |
| /* We are about to start executing the inferior, let's register it |
| with the event loop. NOTE: this is the one place where all the |
| execution commands end up. We could alternatively do this in each |
| of the execution commands in infcmd.c. */ |
| /* FIXME: ezannoni 1999-09-28: We may need to move this out of here |
| into infcmd.c in order to allow inferior function calls to work |
| NOT asynchronously. */ |
| if (target_can_async_p ()) |
| target_async (1); |
| |
| /* We've just told the target to resume. The remote server will |
| wait for the inferior to stop, and then send a stop reply. In |
| the mean time, we can't start another command/query ourselves |
| because the stub wouldn't be ready to process it. This applies |
| only to the base all-stop protocol, however. In non-stop (which |
| only supports vCont), the stub replies with an "OK", and is |
| immediate able to process further serial input. */ |
| if (!target_is_non_stop_p ()) |
| rs->waiting_for_stop_reply = 1; |
| } |
| |
| |
| /* Set up the signal handler for SIGINT, while the target is |
| executing, ovewriting the 'regular' SIGINT signal handler. */ |
| static void |
| async_initialize_sigint_signal_handler (void) |
| { |
| signal (SIGINT, async_handle_remote_sigint); |
| } |
| |
| /* Signal handler for SIGINT, while the target is executing. */ |
| static void |
| async_handle_remote_sigint (int sig) |
| { |
| signal (sig, async_handle_remote_sigint_twice); |
| /* Note we need to go through gdb_call_async_signal_handler in order |
| to wake up the event loop on Windows. */ |
| gdb_call_async_signal_handler (async_sigint_remote_token, 0); |
| } |
| |
| /* Signal handler for SIGINT, installed after SIGINT has already been |
| sent once. It will take effect the second time that the user sends |
| a ^C. */ |
| static void |
| async_handle_remote_sigint_twice (int sig) |
| { |
| signal (sig, async_handle_remote_sigint); |
| /* See note in async_handle_remote_sigint. */ |
| gdb_call_async_signal_handler (async_sigint_remote_twice_token, 0); |
| } |
| |
| /* Implementation of to_check_pending_interrupt. */ |
| |
| static void |
| remote_check_pending_interrupt (struct target_ops *self) |
| { |
| struct async_signal_handler *token = async_sigint_remote_twice_token; |
| |
| if (async_signal_handler_is_marked (token)) |
| { |
| clear_async_signal_handler (token); |
| call_async_signal_handler (token); |
| } |
| } |
| |
| /* Perform the real interruption of the target execution, in response |
| to a ^C. */ |
| static void |
| async_remote_interrupt (gdb_client_data arg) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt called\n"); |
| |
| target_interrupt (inferior_ptid); |
| } |
| |
| /* Perform interrupt, if the first attempt did not succeed. Just give |
| up on the target alltogether. */ |
| static void |
| async_remote_interrupt_twice (gdb_client_data arg) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt_twice called\n"); |
| |
| interrupt_query (); |
| } |
| |
| /* Reinstall the usual SIGINT handlers, after the target has |
| stopped. */ |
| static void |
| async_cleanup_sigint_signal_handler (void *dummy) |
| { |
| signal (SIGINT, handle_sigint); |
| } |
| |
| /* Send ^C to target to halt it. Target will respond, and send us a |
| packet. */ |
| static void (*ofunc) (int); |
| |
| /* The command line interface's interrupt routine. This function is installed |
| as a signal handler for SIGINT. The first time a user requests an |
| interrupt, we call remote_interrupt to send a break or ^C. If there is no |
| response from the target (it didn't stop when the user requested it), |
| we ask the user if he'd like to detach from the target. */ |
| |
| static void |
| sync_remote_interrupt (int signo) |
| { |
| /* If this doesn't work, try more severe steps. */ |
| signal (signo, sync_remote_interrupt_twice); |
| |
| gdb_call_async_signal_handler (async_sigint_remote_token, 1); |
| } |
| |
| /* The user typed ^C twice. */ |
| |
| static void |
| sync_remote_interrupt_twice (int signo) |
| { |
| signal (signo, ofunc); |
| gdb_call_async_signal_handler (async_sigint_remote_twice_token, 1); |
| signal (signo, sync_remote_interrupt); |
| } |
| |
| /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote |
| thread, all threads of a remote process, or all threads of all |
| processes. */ |
| |
| static void |
| remote_stop_ns (ptid_t ptid) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *endp = rs->buf + get_remote_packet_size (); |
| |
| if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| remote_vcont_probe (rs); |
| |
| if (!rs->supports_vCont.t) |
| error (_("Remote server does not support stopping threads")); |
| |
| if (ptid_equal (ptid, minus_one_ptid) |
| || (!remote_multi_process_p (rs) && ptid_is_pid (ptid))) |
| p += xsnprintf (p, endp - p, "vCont;t"); |
| else |
| { |
| ptid_t nptid; |
| |
| p += xsnprintf (p, endp - p, "vCont;t:"); |
| |
| if (ptid_is_pid (ptid)) |
| /* All (-1) threads of process. */ |
| nptid = ptid_build (ptid_get_pid (ptid), -1, 0); |
| else |
| { |
| /* Small optimization: if we already have a stop reply for |
| this thread, no use in telling the stub we want this |
| stopped. */ |
| if (peek_stop_reply (ptid)) |
| return; |
| |
| nptid = ptid; |
| } |
| |
| write_ptid (p, endp, nptid); |
| } |
| |
| /* In non-stop, we get an immediate OK reply. The stop reply will |
| come in asynchronously by notification. */ |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf); |
| } |
| |
| /* All-stop version of target_interrupt. Sends a break or a ^C to |
| interrupt the remote target. It is undefined which thread of which |
| process reports the interrupt. */ |
| |
| static void |
| remote_interrupt_as (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| rs->ctrlc_pending_p = 1; |
| |
| /* If the inferior is stopped already, but the core didn't know |
| about it yet, just ignore the request. The cached wait status |
| will be collected in remote_wait. */ |
| if (rs->cached_wait_status) |
| return; |
| |
| /* Send interrupt_sequence to remote target. */ |
| send_interrupt_sequence (); |
| } |
| |
| /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt |
| the remote target. It is undefined which thread of which process |
| reports the interrupt. Returns true if the packet is supported by |
| the server, false otherwise. */ |
| |
| static int |
| remote_interrupt_ns (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *endp = rs->buf + get_remote_packet_size (); |
| |
| xsnprintf (p, endp - p, "vCtrlC"); |
| |
| /* In non-stop, we get an immediate OK reply. The stop reply will |
| come in asynchronously by notification. */ |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC])) |
| { |
| case PACKET_OK: |
| break; |
| case PACKET_UNKNOWN: |
| return 0; |
| case PACKET_ERROR: |
| error (_("Interrupting target failed: %s"), rs->buf); |
| } |
| |
| return 1; |
| } |
| |
| /* Implement the to_stop function for the remote targets. */ |
| |
| static void |
| remote_stop (struct target_ops *self, ptid_t ptid) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
| |
| if (target_is_non_stop_p ()) |
| remote_stop_ns (ptid); |
| else |
| { |
| /* We don't currently have a way to transparently pause the |
| remote target in all-stop mode. Interrupt it instead. */ |
| remote_interrupt_as (); |
| } |
| } |
| |
| /* Implement the to_interrupt function for the remote targets. */ |
| |
| static void |
| remote_interrupt (struct target_ops *self, ptid_t ptid) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
| |
| if (non_stop) |
| { |
| /* In non-stop mode, we always stop with no signal instead. */ |
| remote_stop_ns (ptid); |
| } |
| else |
| { |
| /* In all-stop, we emulate ^C-ing the remote target's |
| terminal. */ |
| if (target_is_non_stop_p ()) |
| { |
| if (!remote_interrupt_ns ()) |
| { |
| /* No support for ^C-ing the remote target. Stop it |
| (with no signal) instead. */ |
| remote_stop_ns (ptid); |
| } |
| } |
| else |
| remote_interrupt_as (); |
| } |
| } |
| |
| /* Ask the user what to do when an interrupt is received. */ |
| |
| static void |
| interrupt_query (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct cleanup *old_chain; |
| |
| old_chain = make_cleanup_restore_target_terminal (); |
| target_terminal_ours (); |
| |
| if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p) |
| { |
| if (query (_("The target is not responding to interrupt requests.\n" |
| "Stop debugging it? "))) |
| { |
| remote_unpush_target (); |
| throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target.")); |
| } |
| } |
| else |
| { |
| if (query (_("Interrupted while waiting for the program.\n" |
| "Give up waiting? "))) |
| quit (); |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Enable/disable target terminal ownership. Most targets can use |
| terminal groups to control terminal ownership. Remote targets are |
| different in that explicit transfer of ownership to/from GDB/target |
| is required. */ |
| |
| static void |
| remote_terminal_inferior (struct target_ops *self) |
| { |
| if (!target_async_permitted) |
| /* Nothing to do. */ |
| return; |
| |
| /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*() |
| idempotent. The event-loop GDB talking to an asynchronous target |
| with a synchronous command calls this function from both |
| event-top.c and infrun.c/infcmd.c. Once GDB stops trying to |
| transfer the terminal to the target when it shouldn't this guard |
| can go away. */ |
| if (!remote_async_terminal_ours_p) |
| return; |
| delete_file_handler (input_fd); |
| remote_async_terminal_ours_p = 0; |
| async_initialize_sigint_signal_handler (); |
| /* NOTE: At this point we could also register our selves as the |
| recipient of all input. Any characters typed could then be |
| passed on down to the target. */ |
| } |
| |
| static void |
| remote_terminal_ours (struct target_ops *self) |
| { |
| if (!target_async_permitted) |
| /* Nothing to do. */ |
| return; |
| |
| /* See FIXME in remote_terminal_inferior. */ |
| if (remote_async_terminal_ours_p) |
| return; |
| async_cleanup_sigint_signal_handler (NULL); |
| add_file_handler (input_fd, stdin_event_handler, 0); |
| remote_async_terminal_ours_p = 1; |
| } |
| |
| static void |
| remote_console_output (char *msg) |
| { |
| char *p; |
| |
| for (p = msg; p[0] && p[1]; p += 2) |
| { |
| char tb[2]; |
| char c = fromhex (p[0]) * 16 + fromhex (p[1]); |
| |
| tb[0] = c; |
| tb[1] = 0; |
| fputs_unfiltered (tb, gdb_stdtarg); |
| } |
| gdb_flush (gdb_stdtarg); |
| } |
| |
| typedef struct cached_reg |
| { |
| int num; |
| gdb_byte data[MAX_REGISTER_SIZE]; |
| } cached_reg_t; |
| |
| DEF_VEC_O(cached_reg_t); |
| |
| typedef struct stop_reply |
| { |
| struct notif_event base; |
| |
| /* The identifier of the thread about this event */ |
| ptid_t ptid; |
| |
| /* The remote state this event is associated with. When the remote |
| connection, represented by a remote_state object, is closed, |
| all the associated stop_reply events should be released. */ |
| struct remote_state *rs; |
| |
| struct target_waitstatus ws; |
| |
| /* Expedited registers. This makes remote debugging a bit more |
| efficient for those targets that provide critical registers as |
| part of their normal status mechanism (as another roundtrip to |
| fetch them is avoided). */ |
| VEC(cached_reg_t) *regcache; |
| |
| enum target_stop_reason stop_reason; |
| |
| CORE_ADDR watch_data_address; |
| |
| int core; |
| } *stop_reply_p; |
| |
| DECLARE_QUEUE_P (stop_reply_p); |
| DEFINE_QUEUE_P (stop_reply_p); |
| /* The list of already fetched and acknowledged stop events. This |
| queue is used for notification Stop, and other notifications |
| don't need queue for their events, because the notification events |
| of Stop can't be consumed immediately, so that events should be |
| queued first, and be consumed by remote_wait_{ns,as} one per |
| time. Other notifications can consume their events immediately, |
| so queue is not needed for them. */ |
| static QUEUE (stop_reply_p) *stop_reply_queue; |
| |
| static void |
| stop_reply_xfree (struct stop_reply *r) |
| { |
| notif_event_xfree ((struct notif_event *) r); |
| } |
| |
| /* Return the length of the stop reply queue. */ |
| |
| static int |
| stop_reply_queue_length (void) |
| { |
| return QUEUE_length (stop_reply_p, stop_reply_queue); |
| } |
| |
| static void |
| remote_notif_stop_parse (struct notif_client *self, char *buf, |
| struct notif_event *event) |
| { |
| remote_parse_stop_reply (buf, (struct stop_reply *) event); |
| } |
| |
| static void |
| remote_notif_stop_ack (struct notif_client *self, char *buf, |
| struct notif_event *event) |
| { |
| struct stop_reply *stop_reply = (struct stop_reply *) event; |
| |
| /* acknowledge */ |
| putpkt ((char *) self->ack_command); |
| |
| if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE) |
| /* We got an unknown stop reply. */ |
| error (_("Unknown stop reply")); |
| |
| push_stop_reply (stop_reply); |
| } |
| |
| static int |
| remote_notif_stop_can_get_pending_events (struct notif_client *self) |
| { |
| /* We can't get pending events in remote_notif_process for |
| notification stop, and we have to do this in remote_wait_ns |
| instead. If we fetch all queued events from stub, remote stub |
| may exit and we have no chance to process them back in |
| remote_wait_ns. */ |
| mark_async_event_handler (remote_async_inferior_event_token); |
| return 0; |
| } |
| |
| static void |
| stop_reply_dtr (struct notif_event *event) |
| { |
| struct stop_reply *r = (struct stop_reply *) event; |
| |
| VEC_free (cached_reg_t, r->regcache); |
| } |
| |
| static struct notif_event * |
| remote_notif_stop_alloc_reply (void) |
| { |
| /* We cast to a pointer to the "base class". */ |
| struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply); |
| |
| r->dtr = stop_reply_dtr; |
| |
| return r; |
| } |
| |
| /* A client of notification Stop. */ |
| |
| struct notif_client notif_client_stop = |
| { |
| "Stop", |
| "vStopped", |
| remote_notif_stop_parse, |
| remote_notif_stop_ack, |
| remote_notif_stop_can_get_pending_events, |
| remote_notif_stop_alloc_reply, |
| REMOTE_NOTIF_STOP, |
| }; |
| |
| /* A parameter to pass data in and out. */ |
| |
| struct queue_iter_param |
| { |
| void *input; |
| struct stop_reply *output; |
| }; |
| |
| /* Determine if THREAD is a pending fork parent thread. ARG contains |
| the pid of the process that owns the threads we want to check, or |
| -1 if we want to check all threads. */ |
| |
| static int |
| is_pending_fork_parent (struct target_waitstatus *ws, int event_pid, |
| ptid_t thread_ptid) |
| { |
| if (ws->kind == TARGET_WAITKIND_FORKED |
| || ws->kind == TARGET_WAITKIND_VFORKED) |
| { |
| if (event_pid == -1 || event_pid == ptid_get_pid (thread_ptid)) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Check whether EVENT is a fork event, and if it is, remove the |
| fork child from the context list passed in DATA. */ |
| |
| static int |
| remove_child_of_pending_fork (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| stop_reply_p event, |
| void *data) |
| { |
| struct queue_iter_param *param = (struct queue_iter_param *) data; |
| struct threads_listing_context *context |
| = (struct threads_listing_context *) param->input; |
| |
| if (event->ws.kind == TARGET_WAITKIND_FORKED |
| || event->ws.kind == TARGET_WAITKIND_VFORKED |
| || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED) |
| threads_listing_context_remove (&event->ws, context); |
| |
| return 1; |
| } |
| |
| /* If CONTEXT contains any fork child threads that have not been |
| reported yet, remove them from the CONTEXT list. If such a |
| thread exists it is because we are stopped at a fork catchpoint |
| and have not yet called follow_fork, which will set up the |
| host-side data structures for the new process. */ |
| |
| static void |
| remove_new_fork_children (struct threads_listing_context *context) |
| { |
| struct thread_info * thread; |
| int pid = -1; |
| struct notif_client *notif = ¬if_client_stop; |
| struct queue_iter_param param; |
| |
| /* For any threads stopped at a fork event, remove the corresponding |
| fork child threads from the CONTEXT list. */ |
| ALL_NON_EXITED_THREADS (thread) |
| { |
| struct target_waitstatus *ws; |
| |
| if (thread->suspend.waitstatus_pending_p) |
| ws = &thread->suspend.waitstatus; |
| else |
| ws = &thread->pending_follow; |
| |
| if (is_pending_fork_parent (ws, pid, thread->ptid)) |
| { |
| threads_listing_context_remove (ws, context); |
| } |
| } |
| |
| /* Check for any pending fork events (not reported or processed yet) |
| in process PID and remove those fork child threads from the |
| CONTEXT list as well. */ |
| remote_notif_get_pending_events (notif); |
| param.input = context; |
| param.output = NULL; |
| QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| remove_child_of_pending_fork, ¶m); |
| } |
| |
| /* Remove stop replies in the queue if its pid is equal to the given |
| inferior's pid. */ |
| |
| static int |
| remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| stop_reply_p event, |
| void *data) |
| { |
| struct queue_iter_param *param = (struct queue_iter_param *) data; |
| struct inferior *inf = (struct inferior *) param->input; |
| |
| if (ptid_get_pid (event->ptid) == inf->pid) |
| { |
| stop_reply_xfree (event); |
| QUEUE_remove_elem (stop_reply_p, q, iter); |
| } |
| |
| return 1; |
| } |
| |
| /* Discard all pending stop replies of inferior INF. */ |
| |
| static void |
| discard_pending_stop_replies (struct inferior *inf) |
| { |
| struct queue_iter_param param; |
| struct stop_reply *reply; |
| struct remote_state *rs = get_remote_state (); |
| struct remote_notif_state *rns = rs->notif_state; |
| |
| /* This function can be notified when an inferior exists. When the |
| target is not remote, the notification state is NULL. */ |
| if (rs->remote_desc == NULL) |
| return; |
| |
| reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id]; |
| |
| /* Discard the in-flight notification. */ |
| if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid) |
| { |
| stop_reply_xfree (reply); |
| rns->pending_event[notif_client_stop.id] = NULL; |
| } |
| |
| param.input = inf; |
| param.output = NULL; |
| /* Discard the stop replies we have already pulled with |
| vStopped. */ |
| QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| remove_stop_reply_for_inferior, ¶m); |
| } |
| |
| /* If its remote state is equal to the given remote state, |
| remove EVENT from the stop reply queue. */ |
| |
| static int |
| remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| stop_reply_p event, |
| void *data) |
| { |
| struct queue_iter_param *param = (struct queue_iter_param *) data; |
| struct remote_state *rs = (struct remote_state *) param->input; |
| |
| if (event->rs == rs) |
| { |
| stop_reply_xfree (event); |
| QUEUE_remove_elem (stop_reply_p, q, iter); |
| } |
| |
| return 1; |
| } |
| |
| /* Discard the stop replies for RS in stop_reply_queue. */ |
| |
| static void |
| discard_pending_stop_replies_in_queue (struct remote_state *rs) |
| { |
| struct queue_iter_param param; |
| |
| param.input = rs; |
| param.output = NULL; |
| /* Discard the stop replies we have already pulled with |
| vStopped. */ |
| QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| remove_stop_reply_of_remote_state, ¶m); |
| } |
| |
| /* A parameter to pass data in and out. */ |
| |
| static int |
| remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| stop_reply_p event, |
| void *data) |
| { |
| struct queue_iter_param *param = (struct queue_iter_param *) data; |
| ptid_t *ptid = (ptid_t *) param->input; |
| |
| if (ptid_match (event->ptid, *ptid)) |
| { |
| param->output = event; |
| QUEUE_remove_elem (stop_reply_p, q, iter); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* Remove the first reply in 'stop_reply_queue' which matches |
| PTID. */ |
| |
| static struct stop_reply * |
| remote_notif_remove_queued_reply (ptid_t ptid) |
| { |
| struct queue_iter_param param; |
| |
| param.input = &ptid; |
| param.output = NULL; |
| |
| QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| remote_notif_remove_once_on_match, ¶m); |
| if (notif_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "notif: discard queued event: 'Stop' in %s\n", |
| target_pid_to_str (ptid)); |
| |
| return param.output; |
| } |
| |
| /* Look for a queued stop reply belonging to PTID. If one is found, |
| remove it from the queue, and return it. Returns NULL if none is |
| found. If there are still queued events left to process, tell the |
| event loop to get back to target_wait soon. */ |
| |
| static struct stop_reply * |
| queued_stop_reply (ptid_t ptid) |
| { |
| struct stop_reply *r = remote_notif_remove_queued_reply (ptid); |
| |
| if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| /* There's still at least an event left. */ |
| mark_async_event_handler (remote_async_inferior_event_token); |
| |
| return r; |
| } |
| |
| /* Push a fully parsed stop reply in the stop reply queue. Since we |
| know that we now have at least one queued event left to pass to the |
| core side, tell the event loop to get back to target_wait soon. */ |
| |
| static void |
| push_stop_reply (struct stop_reply *new_event) |
| { |
| QUEUE_enque (stop_reply_p, stop_reply_queue, new_event); |
| |
| if (notif_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "notif: push 'Stop' %s to queue %d\n", |
| target_pid_to_str (new_event->ptid), |
| QUEUE_length (stop_reply_p, |
| stop_reply_queue)); |
| |
| mark_async_event_handler (remote_async_inferior_event_token); |
| } |
| |
| static int |
| stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| struct stop_reply *event, |
| void *data) |
| { |
| ptid_t *ptid = (ptid_t *) data; |
| |
| return !(ptid_equal (*ptid, event->ptid) |
| && event->ws.kind == TARGET_WAITKIND_STOPPED); |
| } |
| |
| /* Returns true if we have a stop reply for PTID. */ |
| |
| static int |
| peek_stop_reply (ptid_t ptid) |
| { |
| return !QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| stop_reply_match_ptid_and_ws, &ptid); |
| } |
| |
| /* Helper for remote_parse_stop_reply. Return nonzero if the substring |
| starting with P and ending with PEND matches PREFIX. */ |
| |
| static int |
| strprefix (const char *p, const char *pend, const char *prefix) |
| { |
| for ( ; p < pend; p++, prefix++) |
| if (*p != *prefix) |
| return 0; |
| return *prefix == '\0'; |
| } |
| |
| /* Parse the stop reply in BUF. Either the function succeeds, and the |
| result is stored in EVENT, or throws an error. */ |
| |
| static void |
| remote_parse_stop_reply (char *buf, struct stop_reply *event) |
| { |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| ULONGEST addr; |
| char *p; |
| int skipregs = 0; |
| |
| event->ptid = null_ptid; |
| event->rs = get_remote_state (); |
| event->ws.kind = TARGET_WAITKIND_IGNORE; |
| event->ws.value.integer = 0; |
| event->stop_reason = TARGET_STOPPED_BY_NO_REASON; |
| event->regcache = NULL; |
| event->core = -1; |
| |
| switch (buf[0]) |
| { |
| case 'T': /* Status with PC, SP, FP, ... */ |
| /* Expedited reply, containing Signal, {regno, reg} repeat. */ |
| /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where |
| ss = signal number |
| n... = register number |
| r... = register contents |
| */ |
| |
| p = &buf[3]; /* after Txx */ |
| while (*p) |
| { |
| char *p1; |
| int fieldsize; |
| |
| p1 = strchr (p, ':'); |
| if (p1 == NULL) |
| error (_("Malformed packet(a) (missing colon): %s\n\ |
| Packet: '%s'\n"), |
| p, buf); |
| if (p == p1) |
| error (_("Malformed packet(a) (missing register number): %s\n\ |
| Packet: '%s'\n"), |
| p, buf); |
| |
| /* Some "registers" are actually extended stop information. |
| Note if you're adding a new entry here: GDB 7.9 and |
| earlier assume that all register "numbers" that start |
| with an hex digit are real register numbers. Make sure |
| the server only sends such a packet if it knows the |
| client understands it. */ |
| |
| if (strprefix (p, p1, "thread")) |
| event->ptid = read_ptid (++p1, &p); |
| else if (strprefix (p, p1, "syscall_entry")) |
| { |
| ULONGEST sysno; |
| |
| event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY; |
| p = unpack_varlen_hex (++p1, &sysno); |
| event->ws.value.syscall_number = (int) sysno; |
| } |
| else if (strprefix (p, p1, "syscall_return")) |
| { |
| ULONGEST sysno; |
| |
| event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN; |
| p = unpack_varlen_hex (++p1, &sysno); |
| event->ws.value.syscall_number = (int) sysno; |
| } |
| else if (strprefix (p, p1, "watch") |
| || strprefix (p, p1, "rwatch") |
| || strprefix (p, p1, "awatch")) |
| { |
| event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
| p = unpack_varlen_hex (++p1, &addr); |
| event->watch_data_address = (CORE_ADDR) addr; |
| } |
| else if (strprefix (p, p1, "swbreak")) |
| { |
| event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT; |
| |
| /* Make sure the stub doesn't forget to indicate support |
| with qSupported. */ |
| if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE) |
| error (_("Unexpected swbreak stop reason")); |
| |
| /* The value part is documented as "must be empty", |
| though we ignore it, in case we ever decide to make |
| use of it in a backward compatible way. */ |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else if (strprefix (p, p1, "hwbreak")) |
| { |
| event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT; |
| |
| /* Make sure the stub doesn't forget to indicate support |
| with qSupported. */ |
| if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE) |
| error (_("Unexpected hwbreak stop reason")); |
| |
| /* See above. */ |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else if (strprefix (p, p1, "library")) |
| { |
| event->ws.kind = TARGET_WAITKIND_LOADED; |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else if (strprefix (p, p1, "replaylog")) |
| { |
| event->ws.kind = TARGET_WAITKIND_NO_HISTORY; |
| /* p1 will indicate "begin" or "end", but it makes |
| no difference for now, so ignore it. */ |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else if (strprefix (p, p1, "core")) |
| { |
| ULONGEST c; |
| |
| p = unpack_varlen_hex (++p1, &c); |
| event->core = c; |
| } |
| else if (strprefix (p, p1, "fork")) |
| { |
| event->ws.value.related_pid = read_ptid (++p1, &p); |
| event->ws.kind = TARGET_WAITKIND_FORKED; |
| } |
| else if (strprefix (p, p1, "vfork")) |
| { |
| event->ws.value.related_pid = read_ptid (++p1, &p); |
| event->ws.kind = TARGET_WAITKIND_VFORKED; |
| } |
| else if (strprefix (p, p1, "vforkdone")) |
| { |
| event->ws.kind = TARGET_WAITKIND_VFORK_DONE; |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else if (strprefix (p, p1, "exec")) |
| { |
| ULONGEST ignored; |
| char pathname[PATH_MAX]; |
| int pathlen; |
| |
| /* Determine the length of the execd pathname. */ |
| p = unpack_varlen_hex (++p1, &ignored); |
| pathlen = (p - p1) / 2; |
| |
| /* Save the pathname for event reporting and for |
| the next run command. */ |
| hex2bin (p1, (gdb_byte *) pathname, pathlen); |
| pathname[pathlen] = '\0'; |
| |
| /* This is freed during event handling. */ |
| event->ws.value.execd_pathname = xstrdup (pathname); |
| event->ws.kind = TARGET_WAITKIND_EXECD; |
| |
| /* Skip the registers included in this packet, since |
| they may be for an architecture different from the |
| one used by the original program. */ |
| skipregs = 1; |
| } |
| else if (strprefix (p, p1, "create")) |
| { |
| event->ws.kind = TARGET_WAITKIND_THREAD_CREATED; |
| p = strchrnul (p1 + 1, ';'); |
| } |
| else |
| { |
| ULONGEST pnum; |
| char *p_temp; |
| |
| if (skipregs) |
| { |
| p = strchrnul (p1 + 1, ';'); |
| p++; |
| continue; |
| } |
| |
| /* Maybe a real ``P'' register number. */ |
| p_temp = unpack_varlen_hex (p, &pnum); |
| /* If the first invalid character is the colon, we got a |
| register number. Otherwise, it's an unknown stop |
| reason. */ |
| if (p_temp == p1) |
| { |
| struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum); |
| cached_reg_t cached_reg; |
| |
| if (reg == NULL) |
| error (_("Remote sent bad register number %s: %s\n\ |
| Packet: '%s'\n"), |
| hex_string (pnum), p, buf); |
| |
| cached_reg.num = reg->regnum; |
| |
| p = p1 + 1; |
| fieldsize = hex2bin (p, cached_reg.data, |
| register_size (target_gdbarch (), |
| reg->regnum)); |
| p += 2 * fieldsize; |
| if (fieldsize < register_size (target_gdbarch (), |
| reg->regnum)) |
| warning (_("Remote reply is too short: %s"), buf); |
| |
| VEC_safe_push (cached_reg_t, event->regcache, &cached_reg); |
| } |
| else |
| { |
| /* Not a number. Silently skip unknown optional |
| info. */ |
| p = strchrnul (p1 + 1, ';'); |
| } |
| } |
| |
| if (*p != ';') |
| error (_("Remote register badly formatted: %s\nhere: %s"), |
| buf, p); |
| ++p; |
| } |
| |
| if (event->ws.kind != TARGET_WAITKIND_IGNORE) |
| break; |
| |
| /* fall through */ |
| case 'S': /* Old style status, just signal only. */ |
| { |
| int sig; |
| |
| event->ws.kind = TARGET_WAITKIND_STOPPED; |
| sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
| if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST) |
| event->ws.value.sig = (enum gdb_signal) sig; |
| else |
| event->ws.value.sig = GDB_SIGNAL_UNKNOWN; |
| } |
| break; |
| case 'w': /* Thread exited. */ |
| { |
| char *p; |
| ULONGEST value; |
| |
| event->ws.kind = TARGET_WAITKIND_THREAD_EXITED; |
| p = unpack_varlen_hex (&buf[1], &value); |
| event->ws.value.integer = value; |
| if (*p != ';') |
| error (_("stop reply packet badly formatted: %s"), buf); |
| event->ptid = read_ptid (++p, NULL); |
| break; |
| } |
| case 'W': /* Target exited. */ |
| case 'X': |
| { |
| char *p; |
| int pid; |
| ULONGEST value; |
| |
| /* GDB used to accept only 2 hex chars here. Stubs should |
| only send more if they detect GDB supports multi-process |
| support. */ |
| p = unpack_varlen_hex (&buf[1], &value); |
| |
| if (buf[0] == 'W') |
| { |
| /* The remote process exited. */ |
| event->ws.kind = TARGET_WAITKIND_EXITED; |
| event->ws.value.integer = value; |
| } |
| else |
| { |
| /* The remote process exited with a signal. */ |
| event->ws.kind = TARGET_WAITKIND_SIGNALLED; |
| if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST) |
| event->ws.value.sig = (enum gdb_signal) value; |
| else |
| event->ws.value.sig = GDB_SIGNAL_UNKNOWN; |
| } |
| |
| /* If no process is specified, assume inferior_ptid. */ |
| pid = ptid_get_pid (inferior_ptid); |
| if (*p == '\0') |
| ; |
| else if (*p == ';') |
| { |
| p++; |
| |
| if (*p == '\0') |
| ; |
| else if (startswith (p, "process:")) |
| { |
| ULONGEST upid; |
| |
| p += sizeof ("process:") - 1; |
| unpack_varlen_hex (p, &upid); |
| pid = upid; |
| } |
| else |
| error (_("unknown stop reply packet: %s"), buf); |
| } |
| else |
| error (_("unknown stop reply packet: %s"), buf); |
| event->ptid = pid_to_ptid (pid); |
| } |
| break; |
| case 'N': |
| event->ws.kind = TARGET_WAITKIND_NO_RESUMED; |
| event->ptid = minus_one_ptid; |
| break; |
| } |
| |
| if (target_is_non_stop_p () && ptid_equal (event->ptid, null_ptid)) |
| error (_("No process or thread specified in stop reply: %s"), buf); |
| } |
| |
| /* When the stub wants to tell GDB about a new notification reply, it |
| sends a notification (%Stop, for example). Those can come it at |
| any time, hence, we have to make sure that any pending |
| putpkt/getpkt sequence we're making is finished, before querying |
| the stub for more events with the corresponding ack command |
| (vStopped, for example). E.g., if we started a vStopped sequence |
| immediately upon receiving the notification, something like this |
| could happen: |
| |
| 1.1) --> Hg 1 |
| 1.2) <-- OK |
| 1.3) --> g |
| 1.4) <-- %Stop |
| 1.5) --> vStopped |
| 1.6) <-- (registers reply to step #1.3) |
| |
| Obviously, the reply in step #1.6 would be unexpected to a vStopped |
| query. |
| |
| To solve this, whenever we parse a %Stop notification successfully, |
| we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on |
| doing whatever we were doing: |
| |
| 2.1) --> Hg 1 |
| 2.2) <-- OK |
| 2.3) --> g |
| 2.4) <-- %Stop |
| <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN> |
| 2.5) <-- (registers reply to step #2.3) |
| |
| Eventualy after step #2.5, we return to the event loop, which |
| notices there's an event on the |
| REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the |
| associated callback --- the function below. At this point, we're |
| always safe to start a vStopped sequence. : |
| |
| 2.6) --> vStopped |
| 2.7) <-- T05 thread:2 |
| 2.8) --> vStopped |
| 2.9) --> OK |
| */ |
| |
| void |
| remote_notif_get_pending_events (struct notif_client *nc) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->notif_state->pending_event[nc->id] != NULL) |
| { |
| if (notif_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "notif: process: '%s' ack pending event\n", |
| nc->name); |
| |
| /* acknowledge */ |
| nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]); |
| rs->notif_state->pending_event[nc->id] = NULL; |
| |
| while (1) |
| { |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (strcmp (rs->buf, "OK") == 0) |
| break; |
| else |
| remote_notif_ack (nc, rs->buf); |
| } |
| } |
| else |
| { |
| if (notif_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "notif: process: '%s' no pending reply\n", |
| nc->name); |
| } |
| } |
| |
| /* Called when it is decided that STOP_REPLY holds the info of the |
| event that is to be returned to the core. This function always |
| destroys STOP_REPLY. */ |
| |
| static ptid_t |
| process_stop_reply (struct stop_reply *stop_reply, |
| struct target_waitstatus *status) |
| { |
| ptid_t ptid; |
| |
| *status = stop_reply->ws; |
| ptid = stop_reply->ptid; |
| |
| /* If no thread/process was reported by the stub, assume the current |
| inferior. */ |
| if (ptid_equal (ptid, null_ptid)) |
| ptid = inferior_ptid; |
| |
| if (status->kind != TARGET_WAITKIND_EXITED |
| && status->kind != TARGET_WAITKIND_SIGNALLED |
| && status->kind != TARGET_WAITKIND_NO_RESUMED) |
| { |
| struct private_thread_info *remote_thr; |
| |
| /* Expedited registers. */ |
| if (stop_reply->regcache) |
| { |
| struct regcache *regcache |
| = get_thread_arch_regcache (ptid, target_gdbarch ()); |
| cached_reg_t *reg; |
| int ix; |
| |
| for (ix = 0; |
| VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg); |
| ix++) |
| regcache_raw_supply (regcache, reg->num, reg->data); |
| VEC_free (cached_reg_t, stop_reply->regcache); |
| } |
| |
| remote_notice_new_inferior (ptid, 0); |
| remote_thr = demand_private_info (ptid); |
| remote_thr->core = stop_reply->core; |
| remote_thr->stop_reason = stop_reply->stop_reason; |
| remote_thr->watch_data_address = stop_reply->watch_data_address; |
| } |
| |
| stop_reply_xfree (stop_reply); |
| return ptid; |
| } |
| |
| /* The non-stop mode version of target_wait. */ |
| |
| static ptid_t |
| remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct stop_reply *stop_reply; |
| int ret; |
| int is_notif = 0; |
| |
| /* If in non-stop mode, get out of getpkt even if a |
| notification is received. */ |
| |
| ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 0 /* forever */, &is_notif); |
| while (1) |
| { |
| if (ret != -1 && !is_notif) |
| switch (rs->buf[0]) |
| { |
| case 'E': /* Error of some sort. */ |
| /* We're out of sync with the target now. Did it continue |
| or not? We can't tell which thread it was in non-stop, |
| so just ignore this. */ |
| warning (_("Remote failure reply: %s"), rs->buf); |
| break; |
| case 'O': /* Console output. */ |
| remote_console_output (rs->buf + 1); |
| break; |
| default: |
| warning (_("Invalid remote reply: %s"), rs->buf); |
| break; |
| } |
| |
| /* Acknowledge a pending stop reply that may have arrived in the |
| mean time. */ |
| if (rs->notif_state->pending_event[notif_client_stop.id] != NULL) |
| remote_notif_get_pending_events (¬if_client_stop); |
| |
| /* If indeed we noticed a stop reply, we're done. */ |
| stop_reply = queued_stop_reply (ptid); |
| if (stop_reply != NULL) |
| return process_stop_reply (stop_reply, status); |
| |
| /* Still no event. If we're just polling for an event, then |
| return to the event loop. */ |
| if (options & TARGET_WNOHANG) |
| { |
| status->kind = TARGET_WAITKIND_IGNORE; |
| return minus_one_ptid; |
| } |
| |
| /* Otherwise do a blocking wait. */ |
| ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| 1 /* forever */, &is_notif); |
| } |
| } |
| |
| /* Wait until the remote machine stops, then return, storing status in |
| STATUS just as `wait' would. */ |
| |
| static ptid_t |
| remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| struct remote_state *rs = get_remote_state (); |
| ptid_t event_ptid = null_ptid; |
| char *buf; |
| struct stop_reply *stop_reply; |
| |
| again: |
| |
| status->kind = TARGET_WAITKIND_IGNORE; |
| status->value.integer = 0; |
| |
| stop_reply = queued_stop_reply (ptid); |
| if (stop_reply != NULL) |
| return process_stop_reply (stop_reply, status); |
| |
| if (rs->cached_wait_status) |
| /* Use the cached wait status, but only once. */ |
| rs->cached_wait_status = 0; |
| else |
| { |
| int ret; |
| int is_notif; |
| int forever = ((options & TARGET_WNOHANG) == 0 |
| && wait_forever_enabled_p); |
| |
| if (!rs->waiting_for_stop_reply) |
| { |
| status->kind = TARGET_WAITKIND_NO_RESUMED; |
| return minus_one_ptid; |
| } |
| |
| if (!target_is_async_p ()) |
| { |
| ofunc = signal (SIGINT, sync_remote_interrupt); |
| /* If the user hit C-c before this packet, or between packets, |
| pretend that it was hit right here. */ |
| if (check_quit_flag ()) |
| { |
| clear_quit_flag (); |
| sync_remote_interrupt (SIGINT); |
| } |
| } |
| |
| /* FIXME: cagney/1999-09-27: If we're in async mode we should |
| _never_ wait for ever -> test on target_is_async_p(). |
| However, before we do that we need to ensure that the caller |
| knows how to take the target into/out of async mode. */ |
| ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size, |
| forever, &is_notif); |
| |
| if (!target_is_async_p ()) |
| signal (SIGINT, ofunc); |
| |
| /* GDB gets a notification. Return to core as this event is |
| not interesting. */ |
| if (ret != -1 && is_notif) |
| return minus_one_ptid; |
| |
| if (ret == -1 && (options & TARGET_WNOHANG) != 0) |
| return minus_one_ptid; |
| } |
| |
| buf = rs->buf; |
| |
| /* Assume that the target has acknowledged Ctrl-C unless we receive |
| an 'F' or 'O' packet. */ |
| if (buf[0] != 'F' && buf[0] != 'O') |
| rs->ctrlc_pending_p = 0; |
| |
| switch (buf[0]) |
| { |
| case 'E': /* Error of some sort. */ |
| /* We're out of sync with the target now. Did it continue or |
| not? Not is more likely, so report a stop. */ |
| rs->waiting_for_stop_reply = 0; |
| |
| warning (_("Remote failure reply: %s"), buf); |
| status->kind = TARGET_WAITKIND_STOPPED; |
| status->value.sig = GDB_SIGNAL_0; |
| break; |
| case 'F': /* File-I/O request. */ |
| /* GDB may access the inferior memory while handling the File-I/O |
| request, but we don't want GDB accessing memory while waiting |
| for a stop reply. See the comments in putpkt_binary. Set |
| waiting_for_stop_reply to 0 temporarily. */ |
| rs->waiting_for_stop_reply = 0; |
| remote_fileio_request (buf, rs->ctrlc_pending_p); |
| rs->ctrlc_pending_p = 0; |
| /* GDB handled the File-I/O request, and the target is running |
| again. Keep waiting for events. */ |
| rs->waiting_for_stop_reply = 1; |
| break; |
| case 'N': case 'T': case 'S': case 'X': case 'W': |
| { |
| struct stop_reply *stop_reply; |
| |
| /* There is a stop reply to handle. */ |
| rs->waiting_for_stop_reply = 0; |
| |
| stop_reply |
| = (struct stop_reply *) remote_notif_parse (¬if_client_stop, |
| rs->buf); |
| |
| event_ptid = process_stop_reply (stop_reply, status); |
| break; |
| } |
| case 'O': /* Console output. */ |
| remote_console_output (buf + 1); |
| break; |
| case '\0': |
| if (rs->last_sent_signal != GDB_SIGNAL_0) |
| { |
| /* Zero length reply means that we tried 'S' or 'C' and the |
| remote system doesn't support it. */ |
| target_terminal_ours_for_output (); |
| printf_filtered |
| ("Can't send signals to this remote system. %s not sent.\n", |
| gdb_signal_to_name (rs->last_sent_signal)); |
| rs->last_sent_signal = GDB_SIGNAL_0; |
| target_terminal_inferior (); |
| |
| strcpy ((char *) buf, rs->last_sent_step ? "s" : "c"); |
| putpkt ((char *) buf); |
| break; |
| } |
| /* else fallthrough */ |
| default: |
| warning (_("Invalid remote reply: %s"), buf); |
| break; |
| } |
| |
| if (status->kind == TARGET_WAITKIND_NO_RESUMED) |
| return minus_one_ptid; |
| else if (status->kind == TARGET_WAITKIND_IGNORE) |
| { |
| /* Nothing interesting happened. If we're doing a non-blocking |
| poll, we're done. Otherwise, go back to waiting. */ |
| if (options & TARGET_WNOHANG) |
| return minus_one_ptid; |
| else |
| goto again; |
| } |
| else if (status->kind != TARGET_WAITKIND_EXITED |
| && status->kind != TARGET_WAITKIND_SIGNALLED) |
| { |
| if (!ptid_equal (event_ptid, null_ptid)) |
| record_currthread (rs, event_ptid); |
| else |
| event_ptid = inferior_ptid; |
| } |
| else |
| /* A process exit. Invalidate our notion of current thread. */ |
| record_currthread (rs, minus_one_ptid); |
| |
| return event_ptid; |
| } |
| |
| /* Wait until the remote machine stops, then return, storing status in |
| STATUS just as `wait' would. */ |
| |
| static ptid_t |
| remote_wait (struct target_ops *ops, |
| ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| ptid_t event_ptid; |
| |
| if (target_is_non_stop_p ()) |
| event_ptid = remote_wait_ns (ptid, status, options); |
| else |
| event_ptid = remote_wait_as (ptid, status, options); |
| |
| if (target_is_async_p ()) |
| { |
| /* If there are are events left in the queue tell the event loop |
| to return here. */ |
| if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| mark_async_event_handler (remote_async_inferior_event_token); |
| } |
| |
| return event_ptid; |
| } |
| |
| /* Fetch a single register using a 'p' packet. */ |
| |
| static int |
| fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf, *p; |
| char regp[MAX_REGISTER_SIZE]; |
| int i; |
| |
| if (packet_support (PACKET_p) == PACKET_DISABLE) |
| return 0; |
| |
| if (reg->pnum == -1) |
| return 0; |
| |
| p = rs->buf; |
| *p++ = 'p'; |
| p += hexnumstr (p, reg->pnum); |
| *p++ = '\0'; |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| buf = rs->buf; |
| |
| switch (packet_ok (buf, &remote_protocol_packets[PACKET_p])) |
| { |
| case PACKET_OK: |
| break; |
| case PACKET_UNKNOWN: |
| return 0; |
| case PACKET_ERROR: |
| error (_("Could not fetch register \"%s\"; remote failure reply '%s'"), |
| gdbarch_register_name (get_regcache_arch (regcache), |
| reg->regnum), |
| buf); |
| } |
| |
| /* If this register is unfetchable, tell the regcache. */ |
| if (buf[0] == 'x') |
| { |
| regcache_raw_supply (regcache, reg->regnum, NULL); |
| return 1; |
| } |
| |
| /* Otherwise, parse and supply the value. */ |
| p = buf; |
| i = 0; |
| while (p[0] != 0) |
| { |
| if (p[1] == 0) |
| error (_("fetch_register_using_p: early buf termination")); |
| |
| regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| p += 2; |
| } |
| regcache_raw_supply (regcache, reg->regnum, regp); |
| return 1; |
| } |
| |
| /* Fetch the registers included in the target's 'g' packet. */ |
| |
| static int |
| send_g_packet (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int buf_len; |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "g"); |
| remote_send (&rs->buf, &rs->buf_size); |
| |
| /* We can get out of synch in various cases. If the first character |
| in the buffer is not a hex character, assume that has happened |
| and try to fetch another packet to read. */ |
| while ((rs->buf[0] < '0' || rs->buf[0] > '9') |
| && (rs->buf[0] < 'A' || rs->buf[0] > 'F') |
| && (rs->buf[0] < 'a' || rs->buf[0] > 'f') |
| && rs->buf[0] != 'x') /* New: unavailable register value. */ |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Bad register packet; fetching a new packet\n"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| } |
| |
| buf_len = strlen (rs->buf); |
| |
| /* Sanity check the received packet. */ |
| if (buf_len % 2 != 0) |
| error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf); |
| |
| return buf_len / 2; |
| } |
| |
| static void |
| process_g_packet (struct regcache *regcache) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| struct remote_state *rs = get_remote_state (); |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| int i, buf_len; |
| char *p; |
| char *regs; |
| |
| buf_len = strlen (rs->buf); |
| |
| /* Further sanity checks, with knowledge of the architecture. */ |
| if (buf_len > 2 * rsa->sizeof_g_packet) |
| error (_("Remote 'g' packet reply is too long: %s"), rs->buf); |
| |
| /* Save the size of the packet sent to us by the target. It is used |
| as a heuristic when determining the max size of packets that the |
| target can safely receive. */ |
| if (rsa->actual_register_packet_size == 0) |
| rsa->actual_register_packet_size = buf_len; |
| |
| /* If this is smaller than we guessed the 'g' packet would be, |
| update our records. A 'g' reply that doesn't include a register's |
| value implies either that the register is not available, or that |
| the 'p' packet must be used. */ |
| if (buf_len < 2 * rsa->sizeof_g_packet) |
| { |
| rsa->sizeof_g_packet = buf_len / 2; |
| |
| for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| { |
| if (rsa->regs[i].pnum == -1) |
| continue; |
| |
| if (rsa->regs[i].offset >= rsa->sizeof_g_packet) |
| rsa->regs[i].in_g_packet = 0; |
| else |
| rsa->regs[i].in_g_packet = 1; |
| } |
| } |
| |
| regs = (char *) alloca (rsa->sizeof_g_packet); |
| |
| /* Unimplemented registers read as all bits zero. */ |
| memset (regs, 0, rsa->sizeof_g_packet); |
| |
| /* Reply describes registers byte by byte, each byte encoded as two |
| hex characters. Suck them all up, then supply them to the |
| register cacheing/storage mechanism. */ |
| |
| p = rs->buf; |
| for (i = 0; i < rsa->sizeof_g_packet; i++) |
| { |
| if (p[0] == 0 || p[1] == 0) |
| /* This shouldn't happen - we adjusted sizeof_g_packet above. */ |
| internal_error (__FILE__, __LINE__, |
| _("unexpected end of 'g' packet reply")); |
| |
| if (p[0] == 'x' && p[1] == 'x') |
| regs[i] = 0; /* 'x' */ |
| else |
| regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| p += 2; |
| } |
| |
| for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
| { |
| struct packet_reg *r = &rsa->regs[i]; |
| |
| if (r->in_g_packet) |
| { |
| if (r->offset * 2 >= strlen (rs->buf)) |
| /* This shouldn't happen - we adjusted in_g_packet above. */ |
| internal_error (__FILE__, __LINE__, |
| _("unexpected end of 'g' packet reply")); |
| else if (rs->buf[r->offset * 2] == 'x') |
| { |
| gdb_assert (r->offset * 2 < strlen (rs->buf)); |
| /* The register isn't available, mark it as such (at |
| the same time setting the value to zero). */ |
| regcache_raw_supply (regcache, r->regnum, NULL); |
| } |
| else |
| regcache_raw_supply (regcache, r->regnum, |
| regs + r->offset); |
| } |
| } |
| } |
| |
| static void |
| fetch_registers_using_g (struct regcache *regcache) |
| { |
| send_g_packet (); |
| process_g_packet (regcache); |
| } |
| |
| /* Make the remote selected traceframe match GDB's selected |
| traceframe. */ |
| |
| static void |
| set_remote_traceframe (void) |
| { |
| int newnum; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->remote_traceframe_number == get_traceframe_number ()) |
| return; |
| |
| /* Avoid recursion, remote_trace_find calls us again. */ |
| rs->remote_traceframe_number = get_traceframe_number (); |
| |
| newnum = target_trace_find (tfind_number, |
| get_traceframe_number (), 0, 0, NULL); |
| |
| /* Should not happen. If it does, all bets are off. */ |
| if (newnum != get_traceframe_number ()) |
| warning (_("could not set remote traceframe")); |
| } |
| |
| static void |
| remote_fetch_registers (struct target_ops *ops, |
| struct regcache *regcache, int regnum) |
| { |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| int i; |
| |
| set_remote_traceframe (); |
| set_general_thread (inferior_ptid); |
| |
| if (regnum >= 0) |
| { |
| struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); |
| |
| gdb_assert (reg != NULL); |
| |
| /* If this register might be in the 'g' packet, try that first - |
| we are likely to read more than one register. If this is the |
| first 'g' packet, we might be overly optimistic about its |
| contents, so fall back to 'p'. */ |
| if (reg->in_g_packet) |
| { |
| fetch_registers_using_g (regcache); |
| if (reg->in_g_packet) |
| return; |
| } |
| |
| if (fetch_register_using_p (regcache, reg)) |
| return; |
| |
| /* This register is not available. */ |
| regcache_raw_supply (regcache, reg->regnum, NULL); |
| |
| return; |
| } |
| |
| fetch_registers_using_g (regcache); |
| |
| for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| if (!rsa->regs[i].in_g_packet) |
| if (!fetch_register_using_p (regcache, &rsa->regs[i])) |
| { |
| /* This register is not available. */ |
| regcache_raw_supply (regcache, i, NULL); |
| } |
| } |
| |
| /* Prepare to store registers. Since we may send them all (using a |
| 'G' request), we have to read out the ones we don't want to change |
| first. */ |
| |
| static void |
| remote_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
| { |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| int i; |
| gdb_byte buf[MAX_REGISTER_SIZE]; |
| |
| /* Make sure the entire registers array is valid. */ |
| switch (packet_support (PACKET_P)) |
| { |
| case PACKET_DISABLE: |
| case PACKET_SUPPORT_UNKNOWN: |
| /* Make sure all the necessary registers are cached. */ |
| for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| if (rsa->regs[i].in_g_packet) |
| regcache_raw_read (regcache, rsa->regs[i].regnum, buf); |
| break; |
| case PACKET_ENABLE: |
| break; |
| } |
| } |
| |
| /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF |
| packet was not recognized. */ |
| |
| static int |
| store_register_using_P (const struct regcache *regcache, |
| struct packet_reg *reg) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| struct remote_state *rs = get_remote_state (); |
| /* Try storing a single register. */ |
| char *buf = rs->buf; |
| gdb_byte regp[MAX_REGISTER_SIZE]; |
| char *p; |
| |
| if (packet_support (PACKET_P) == PACKET_DISABLE) |
| return 0; |
| |
| if (reg->pnum == -1) |
| return 0; |
| |
| xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0)); |
| p = buf + strlen (buf); |
| regcache_raw_collect (regcache, reg->regnum, regp); |
| bin2hex (regp, p, register_size (gdbarch, reg->regnum)); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P])) |
| { |
| case PACKET_OK: |
| return 1; |
| case PACKET_ERROR: |
| error (_("Could not write register \"%s\"; remote failure reply '%s'"), |
| gdbarch_register_name (gdbarch, reg->regnum), rs->buf); |
| case PACKET_UNKNOWN: |
| return 0; |
| default: |
| internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); |
| } |
| } |
| |
| /* Store register REGNUM, or all registers if REGNUM == -1, from the |
| contents of the register cache buffer. FIXME: ignores errors. */ |
| |
| static void |
| store_registers_using_G (const struct regcache *regcache) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| gdb_byte *regs; |
| char *p; |
| |
| /* Extract all the registers in the regcache copying them into a |
| local buffer. */ |
| { |
| int i; |
| |
| regs = (gdb_byte *) alloca (rsa->sizeof_g_packet); |
| memset (regs, 0, rsa->sizeof_g_packet); |
| for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| { |
| struct packet_reg *r = &rsa->regs[i]; |
| |
| if (r->in_g_packet) |
| regcache_raw_collect (regcache, r->regnum, regs + r->offset); |
| } |
| } |
| |
| /* Command describes registers byte by byte, |
| each byte encoded as two hex characters. */ |
| p = rs->buf; |
| *p++ = 'G'; |
| /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets |
| updated. */ |
| bin2hex (regs, p, rsa->sizeof_g_packet); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (packet_check_result (rs->buf) == PACKET_ERROR) |
| error (_("Could not write registers; remote failure reply '%s'"), |
| rs->buf); |
| } |
| |
| /* Store register REGNUM, or all registers if REGNUM == -1, from the contents |
| of the register cache buffer. FIXME: ignores errors. */ |
| |
| static void |
| remote_store_registers (struct target_ops *ops, |
| struct regcache *regcache, int regnum) |
| { |
| struct remote_arch_state *rsa = get_remote_arch_state (); |
| int i; |
| |
| set_remote_traceframe (); |
| set_general_thread (inferior_ptid); |
| |
| if (regnum >= 0) |
| { |
| struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); |
| |
| gdb_assert (reg != NULL); |
| |
| /* Always prefer to store registers using the 'P' packet if |
| possible; we often change only a small number of registers. |
| Sometimes we change a larger number; we'd need help from a |
| higher layer to know to use 'G'. */ |
| if (store_register_using_P (regcache, reg)) |
| return; |
| |
| /* For now, don't complain if we have no way to write the |
| register. GDB loses track of unavailable registers too |
| easily. Some day, this may be an error. We don't have |
| any way to read the register, either... */ |
| if (!reg->in_g_packet) |
| return; |
| |
| store_registers_using_G (regcache); |
| return; |
| } |
| |
| store_registers_using_G (regcache); |
| |
| for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| if (!rsa->regs[i].in_g_packet) |
| if (!store_register_using_P (regcache, &rsa->regs[i])) |
| /* See above for why we do not issue an error here. */ |
| continue; |
| } |
| |
| |
| /* Return the number of hex digits in num. */ |
| |
| static int |
| hexnumlen (ULONGEST num) |
| { |
| int i; |
| |
| for (i = 0; num != 0; i++) |
| num >>= 4; |
| |
| return max (i, 1); |
| } |
| |
| /* Set BUF to the minimum number of hex digits representing NUM. */ |
| |
| static int |
| hexnumstr (char *buf, ULONGEST num) |
| { |
| int len = hexnumlen (num); |
| |
| return hexnumnstr (buf, num, len); |
| } |
| |
| |
| /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ |
| |
| static int |
| hexnumnstr (char *buf, ULONGEST num, int width) |
| { |
| int i; |
| |
| buf[width] = '\0'; |
| |
| for (i = width - 1; i >= 0; i--) |
| { |
| buf[i] = "0123456789abcdef"[(num & 0xf)]; |
| num >>= 4; |
| } |
| |
| return width; |
| } |
| |
| /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ |
| |
| static CORE_ADDR |
| remote_address_masked (CORE_ADDR addr) |
| { |
| unsigned int address_size = remote_address_size; |
| |
| /* If "remoteaddresssize" was not set, default to target address size. */ |
| if (!address_size) |
| address_size = gdbarch_addr_bit (target_gdbarch ()); |
| |
| if (address_size > 0 |
| && address_size < (sizeof (ULONGEST) * 8)) |
| { |
| /* Only create a mask when that mask can safely be constructed |
| in a ULONGEST variable. */ |
| ULONGEST mask = 1; |
| |
| mask = (mask << address_size) - 1; |
| addr &= mask; |
| } |
| return addr; |
| } |
| |
| /* Determine whether the remote target supports binary downloading. |
| This is accomplished by sending a no-op memory write of zero length |
| to the target at the specified address. It does not suffice to send |
| the whole packet, since many stubs strip the eighth bit and |
| subsequently compute a wrong checksum, which causes real havoc with |
| remote_write_bytes. |
| |
| NOTE: This can still lose if the serial line is not eight-bit |
| clean. In cases like this, the user should clear "remote |
| X-packet". */ |
| |
| static void |
| check_binary_download (CORE_ADDR addr) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| switch (packet_support (PACKET_X)) |
| { |
| case PACKET_DISABLE: |
| break; |
| case PACKET_ENABLE: |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| { |
| char *p; |
| |
| p = rs->buf; |
| *p++ = 'X'; |
| p += hexnumstr (p, (ULONGEST) addr); |
| *p++ = ','; |
| p += hexnumstr (p, (ULONGEST) 0); |
| *p++ = ':'; |
| *p = '\0'; |
| |
| putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (rs->buf[0] == '\0') |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "binary downloading NOT " |
| "supported by target\n"); |
| remote_protocol_packets[PACKET_X].support = PACKET_DISABLE; |
| } |
| else |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "binary downloading supported by target\n"); |
| remote_protocol_packets[PACKET_X].support = PACKET_ENABLE; |
| } |
| break; |
| } |
| } |
| } |
| |
| /* Helper function to resize the payload in order to try to get a good |
| alignment. We try to write an amount of data such that the next write will |
| start on an address aligned on REMOTE_ALIGN_WRITES. */ |
| |
| static int |
| align_for_efficient_write (int todo, CORE_ADDR memaddr) |
| { |
| return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr; |
| } |
| |
| /* Write memory data directly to the remote machine. |
| This does not inform the data cache; the data cache uses this. |
| HEADER is the starting part of the packet. |
| MEMADDR is the address in the remote memory space. |
| MYADDR is the address of the buffer in our space. |
| LEN_UNITS is the number of addressable units to write. |
| UNIT_SIZE is the length in bytes of an addressable unit. |
| PACKET_FORMAT should be either 'X' or 'M', and indicates if we |
| should send data as binary ('X'), or hex-encoded ('M'). |
| |
| The function creates packet of the form |
| <HEADER><ADDRESS>,<LENGTH>:<DATA> |
| |
| where encoding of <DATA> is terminated by PACKET_FORMAT. |
| |
| If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma |
| are omitted. |
| |
| Return the transferred status, error or OK (an |
| 'enum target_xfer_status' value). Save the number of addressable units |
| transferred in *XFERED_LEN_UNITS. Only transfer a single packet. |
| |
| On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an |
| exchange between gdb and the stub could look like (?? in place of the |
| checksum): |
| |
| -> $m1000,4#?? |
| <- aaaabbbbccccdddd |
| |
| -> $M1000,3:eeeeffffeeee#?? |
| <- OK |
| |
| -> $m1000,4#?? |
| <- eeeeffffeeeedddd */ |
| |
| static enum target_xfer_status |
| remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, |
| const gdb_byte *myaddr, ULONGEST len_units, |
| int unit_size, ULONGEST *xfered_len_units, |
| char packet_format, int use_length) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p; |
| char *plen = NULL; |
| int plenlen = 0; |
| int todo_units; |
| int units_written; |
| int payload_capacity_bytes; |
| int payload_length_bytes; |
| |
| if (packet_format != 'X' && packet_format != 'M') |
| internal_error (__FILE__, __LINE__, |
| _("remote_write_bytes_aux: bad packet format")); |
| |
| if (len_units == 0) |
| return TARGET_XFER_EOF; |
| |
| payload_capacity_bytes = get_memory_write_packet_size (); |
| |
| /* The packet buffer will be large enough for the payload; |
| get_memory_packet_size ensures this. */ |
| rs->buf[0] = '\0'; |
| |
| /* Compute the size of the actual payload by subtracting out the |
| packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ |
| |
| payload_capacity_bytes -= strlen ("$,:#NN"); |
| if (!use_length) |
| /* The comma won't be used. */ |
| payload_capacity_bytes += 1; |
| payload_capacity_bytes -= strlen (header); |
| payload_capacity_bytes -= hexnumlen (memaddr); |
| |
| /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */ |
| |
| strcat (rs->buf, header); |
| p = rs->buf + strlen (header); |
| |
| /* Compute a best guess of the number of bytes actually transfered. */ |
| if (packet_format == 'X') |
| { |
| /* Best guess at number of bytes that will fit. */ |
| todo_units = min (len_units, payload_capacity_bytes / unit_size); |
| if (use_length) |
| payload_capacity_bytes -= hexnumlen (todo_units); |
| todo_units = min (todo_units, payload_capacity_bytes / unit_size); |
| } |
| else |
| { |
| /* Number of bytes that will fit. */ |
| todo_units = min (len_units, (payload_capacity_bytes / unit_size) / 2); |
| if (use_length) |
| payload_capacity_bytes -= hexnumlen (todo_units); |
| todo_units = min (todo_units, (payload_capacity_bytes / unit_size) / 2); |
| } |
| |
| if (todo_units <= 0) |
| internal_error (__FILE__, __LINE__, |
| _("minimum packet size too small to write data")); |
| |
| /* If we already need another packet, then try to align the end |
| of this packet to a useful boundary. */ |
| if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units) |
| todo_units = align_for_efficient_write (todo_units, memaddr); |
| |
| /* Append "<memaddr>". */ |
| memaddr = remote_address_masked (memaddr); |
| p += hexnumstr (p, (ULONGEST) memaddr); |
| |
| if (use_length) |
| { |
| /* Append ",". */ |
| *p++ = ','; |
| |
| /* Append the length and retain its location and size. It may need to be |
| adjusted once the packet body has been created. */ |
| plen = p; |
| plenlen = hexnumstr (p, (ULONGEST) todo_units); |
| p += plenlen; |
| } |
| |
| /* Append ":". */ |
| *p++ = ':'; |
| *p = '\0'; |
| |
| /* Append the packet body. */ |
| if (packet_format == 'X') |
| { |
| /* Binary mode. Send target system values byte by byte, in |
| increasing byte addresses. Only escape certain critical |
| characters. */ |
| payload_length_bytes = |
| remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p, |
| &units_written, payload_capacity_bytes); |
| |
| /* If not all TODO units fit, then we'll need another packet. Make |
| a second try to keep the end of the packet aligned. Don't do |
| this if the packet is tiny. */ |
| if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES) |
| { |
| int new_todo_units; |
| |
| new_todo_units = align_for_efficient_write (units_written, memaddr); |
| |
| if (new_todo_units != units_written) |
| payload_length_bytes = |
| remote_escape_output (myaddr, new_todo_units, unit_size, |
| (gdb_byte *) p, &units_written, |
| payload_capacity_bytes); |
| } |
| |
| p += payload_length_bytes; |
| if (use_length && units_written < todo_units) |
| { |
| /* Escape chars have filled up the buffer prematurely, |
| and we have actually sent fewer units than planned. |
| Fix-up the length field of the packet. Use the same |
| number of characters as before. */ |
| plen += hexnumnstr (plen, (ULONGEST) units_written, |
| plenlen); |
| *plen = ':'; /* overwrite \0 from hexnumnstr() */ |
| } |
| } |
| else |
| { |
| /* Normal mode: Send target system values byte by byte, in |
| increasing byte addresses. Each byte is encoded as a two hex |
| value. */ |
| p += 2 * bin2hex (myaddr, p, todo_units * unit_size); |
| units_written = todo_units; |
| } |
| |
| putpkt_binary (rs->buf, (int) (p - rs->buf)); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (rs->buf[0] == 'E') |
| return TARGET_XFER_E_IO; |
| |
| /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to |
| send fewer units than we'd planned. */ |
| *xfered_len_units = (ULONGEST) units_written; |
| return TARGET_XFER_OK; |
| } |
| |
| /* Write memory data directly to the remote machine. |
| This does not inform the data cache; the data cache uses this. |
| MEMADDR is the address in the remote memory space. |
| MYADDR is the address of the buffer in our space. |
| LEN is the number of bytes. |
| |
| Return the transferred status, error or OK (an |
| 'enum target_xfer_status' value). Save the number of bytes |
| transferred in *XFERED_LEN. Only transfer a single packet. */ |
| |
| static enum target_xfer_status |
| remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len, |
| int unit_size, ULONGEST *xfered_len) |
| { |
| char *packet_format = 0; |
| |
| /* Check whether the target supports binary download. */ |
| check_binary_download (memaddr); |
| |
| switch (packet_support (PACKET_X)) |
| { |
| case PACKET_ENABLE: |
| packet_format = "X"; |
| break; |
| case PACKET_DISABLE: |
| packet_format = "M"; |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| internal_error (__FILE__, __LINE__, |
| _("remote_write_bytes: bad internal state")); |
| default: |
| internal_error (__FILE__, __LINE__, _("bad switch")); |
| } |
| |
| return remote_write_bytes_aux (packet_format, |
| memaddr, myaddr, len, unit_size, xfered_len, |
| packet_format[0], 1); |
| } |
| |
| /* Read memory data directly from the remote machine. |
| This does not use the data cache; the data cache uses this. |
| MEMADDR is the address in the remote memory space. |
| MYADDR is the address of the buffer in our space. |
| LEN_UNITS is the number of addressable memory units to read.. |
| UNIT_SIZE is the length in bytes of an addressable unit. |
| |
| Return the transferred status, error or OK (an |
| 'enum target_xfer_status' value). Save the number of bytes |
| transferred in *XFERED_LEN_UNITS. |
| |
| See the comment of remote_write_bytes_aux for an example of |
| memory read/write exchange between gdb and the stub. */ |
| |
| static enum target_xfer_status |
| remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len_units, |
| int unit_size, ULONGEST *xfered_len_units) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int buf_size_bytes; /* Max size of packet output buffer. */ |
| char *p; |
| int todo_units; |
| int decoded_bytes; |
| |
| buf_size_bytes = get_memory_read_packet_size (); |
| /* The packet buffer will be large enough for the payload; |
| get_memory_packet_size ensures this. */ |
| |
| /* Number of units that will fit. */ |
| todo_units = min (len_units, (buf_size_bytes / unit_size) / 2); |
| |
| /* Construct "m"<memaddr>","<len>". */ |
| memaddr = remote_address_masked (memaddr); |
| p = rs->buf; |
| *p++ = 'm'; |
| p += hexnumstr (p, (ULONGEST) memaddr); |
| *p++ = ','; |
| p += hexnumstr (p, (ULONGEST) todo_units); |
| *p = '\0'; |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| if (rs->buf[0] == 'E' |
| && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) |
| && rs->buf[3] == '\0') |
| return TARGET_XFER_E_IO; |
| /* Reply describes memory byte by byte, each byte encoded as two hex |
| characters. */ |
| p = rs->buf; |
| decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size); |
| /* Return what we have. Let higher layers handle partial reads. */ |
| *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size); |
| return TARGET_XFER_OK; |
| } |
| |
| /* Using the set of read-only target sections of remote, read live |
| read-only memory. |
| |
| For interface/parameters/return description see target.h, |
| to_xfer_partial. */ |
| |
| static enum target_xfer_status |
| remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf, |
| ULONGEST memaddr, ULONGEST len, |
| int unit_size, ULONGEST *xfered_len) |
| { |
| struct target_section *secp; |
| struct target_section_table *table; |
| |
| secp = target_section_by_addr (ops, memaddr); |
| if (secp != NULL |
| && (bfd_get_section_flags (secp->the_bfd_section->owner, |
| secp->the_bfd_section) |
| & SEC_READONLY)) |
| { |
| struct target_section *p; |
| ULONGEST memend = memaddr + len; |
| |
| table = target_get_section_table (ops); |
| |
| for (p = table->sections; p < table->sections_end; p++) |
| { |
| if (memaddr >= p->addr) |
| { |
| if (memend <= p->endaddr) |
| { |
| /* Entire transfer is within this section. */ |
| return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, |
| xfered_len); |
| } |
| else if (memaddr >= p->endaddr) |
| { |
| /* This section ends before the transfer starts. */ |
| continue; |
| } |
| else |
| { |
| /* This section overlaps the transfer. Just do half. */ |
| len = p->endaddr - memaddr; |
| return remote_read_bytes_1 (memaddr, readbuf, len, unit_size, |
| xfered_len); |
| } |
| } |
| } |
| } |
| |
| return TARGET_XFER_EOF; |
| } |
| |
| /* Similar to remote_read_bytes_1, but it reads from the remote stub |
| first if the requested memory is unavailable in traceframe. |
| Otherwise, fall back to remote_read_bytes_1. */ |
| |
| static enum target_xfer_status |
| remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr, |
| gdb_byte *myaddr, ULONGEST len, int unit_size, |
| ULONGEST *xfered_len) |
| { |
| if (len == 0) |
| return TARGET_XFER_EOF; |
| |
| if (get_traceframe_number () != -1) |
| { |
| VEC(mem_range_s) *available; |
| |
| /* If we fail to get the set of available memory, then the |
| target does not support querying traceframe info, and so we |
| attempt reading from the traceframe anyway (assuming the |
| target implements the old QTro packet then). */ |
| if (traceframe_available_memory (&available, memaddr, len)) |
| { |
| struct cleanup *old_chain; |
| |
| old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available); |
| |
| if (VEC_empty (mem_range_s, available) |
| || VEC_index (mem_range_s, available, 0)->start != memaddr) |
| { |
| enum target_xfer_status res; |
| |
| /* Don't read into the traceframe's available |
| memory. */ |
| if (!VEC_empty (mem_range_s, available)) |
| { |
| LONGEST oldlen = len; |
| |
| len = VEC_index (mem_range_s, available, 0)->start - memaddr; |
| gdb_assert (len <= oldlen); |
| } |
| |
| do_cleanups (old_chain); |
| |
| /* This goes through the topmost target again. */ |
| res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr, |
| len, unit_size, xfered_len); |
| if (res == TARGET_XFER_OK) |
| return TARGET_XFER_OK; |
| else |
| { |
| /* No use trying further, we know some memory starting |
| at MEMADDR isn't available. */ |
| *xfered_len = len; |
| return TARGET_XFER_UNAVAILABLE; |
| } |
| } |
| |
| /* Don't try to read more than how much is available, in |
| case the target implements the deprecated QTro packet to |
| cater for older GDBs (the target's knowledge of read-only |
| sections may be outdated by now). */ |
| len = VEC_index (mem_range_s, available, 0)->length; |
| |
| do_cleanups (old_chain); |
| } |
| } |
| |
| return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len); |
| } |
| |
| |
| |
| /* Sends a packet with content determined by the printf format string |
| FORMAT and the remaining arguments, then gets the reply. Returns |
| whether the packet was a success, a failure, or unknown. */ |
| |
| static enum packet_result remote_send_printf (const char *format, ...) |
| ATTRIBUTE_PRINTF (1, 2); |
| |
| static enum packet_result |
| remote_send_printf (const char *format, ...) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int max_size = get_remote_packet_size (); |
| va_list ap; |
| |
| va_start (ap, format); |
| |
| rs->buf[0] = '\0'; |
| if (vsnprintf (rs->buf, max_size, format, ap) >= max_size) |
| internal_error (__FILE__, __LINE__, _("Too long remote packet.")); |
| |
| if (putpkt (rs->buf) < 0) |
| error (_("Communication problem with target.")); |
| |
| rs->buf[0] = '\0'; |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| return packet_check_result (rs->buf); |
| } |
| |
| static void |
| restore_remote_timeout (void *p) |
| { |
| int value = *(int *)p; |
| |
| remote_timeout = value; |
| } |
| |
| /* Flash writing can take quite some time. We'll set |
| effectively infinite timeout for flash operations. |
| In future, we'll need to decide on a better approach. */ |
| static const int remote_flash_timeout = 1000; |
| |
| static void |
| remote_flash_erase (struct target_ops *ops, |
| ULONGEST address, LONGEST length) |
| { |
| int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| int saved_remote_timeout = remote_timeout; |
| enum packet_result ret; |
| struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| &saved_remote_timeout); |
| |
| remote_timeout = remote_flash_timeout; |
| |
| ret = remote_send_printf ("vFlashErase:%s,%s", |
| phex (address, addr_size), |
| phex (length, 4)); |
| switch (ret) |
| { |
| case PACKET_UNKNOWN: |
| error (_("Remote target does not support flash erase")); |
| case PACKET_ERROR: |
| error (_("Error erasing flash with vFlashErase packet")); |
| default: |
| break; |
| } |
| |
| do_cleanups (back_to); |
| } |
| |
| static enum target_xfer_status |
| remote_flash_write (struct target_ops *ops, ULONGEST address, |
| ULONGEST length, ULONGEST *xfered_len, |
| const gdb_byte *data) |
| { |
| int saved_remote_timeout = remote_timeout; |
| enum target_xfer_status ret; |
| struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| &saved_remote_timeout); |
| |
| remote_timeout = remote_flash_timeout; |
| ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1, |
| xfered_len,'X', 0); |
| do_cleanups (back_to); |
| |
| return ret; |
| } |
| |
| static void |
| remote_flash_done (struct target_ops *ops) |
| { |
| int saved_remote_timeout = remote_timeout; |
| int ret; |
| struct cleanup *back_to = make_cleanup (restore_remote_timeout, |
| &saved_remote_timeout); |
| |
| remote_timeout = remote_flash_timeout; |
| ret = remote_send_printf ("vFlashDone"); |
| do_cleanups (back_to); |
| |
| switch (ret) |
| { |
| case PACKET_UNKNOWN: |
| error (_("Remote target does not support vFlashDone")); |
| case PACKET_ERROR: |
| error (_("Error finishing flash operation")); |
| default: |
| break; |
| } |
| } |
| |
| static void |
| remote_files_info (struct target_ops *ignore) |
| { |
| puts_filtered ("Debugging a target over a serial line.\n"); |
| } |
| |
| /* Stuff for dealing with the packets which are part of this protocol. |
| See comment at top of file for details. */ |
| |
| /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR |
| error to higher layers. Called when a serial error is detected. |
| The exception message is STRING, followed by a colon and a blank, |
| the system error message for errno at function entry and final dot |
| for output compatibility with throw_perror_with_name. */ |
| |
| static void |
| unpush_and_perror (const char *string) |
| { |
| int saved_errno = errno; |
| |
| remote_unpush_target (); |
| throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string, |
| safe_strerror (saved_errno)); |
| } |
| |
| /* Read a single character from the remote end. */ |
| |
| static int |
| readchar (int timeout) |
| { |
| int ch; |
| struct remote_state *rs = get_remote_state (); |
| |
| ch = serial_readchar (rs->remote_desc, timeout); |
| |
| if (ch >= 0) |
| return ch; |
| |
| switch ((enum serial_rc) ch) |
| { |
| case SERIAL_EOF: |
| remote_unpush_target (); |
| throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed")); |
| /* no return */ |
| case SERIAL_ERROR: |
| unpush_and_perror (_("Remote communication error. " |
| "Target disconnected.")); |
| /* no return */ |
| case SERIAL_TIMEOUT: |
| break; |
| } |
| return ch; |
| } |
| |
| /* Wrapper for serial_write that closes the target and throws if |
| writing fails. */ |
| |
| static void |
| remote_serial_write (const char *str, int len) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (serial_write (rs->remote_desc, str, len)) |
| { |
| unpush_and_perror (_("Remote communication error. " |
| "Target disconnected.")); |
| } |
| } |
| |
| /* Send the command in *BUF to the remote machine, and read the reply |
| into *BUF. Report an error if we get an error reply. Resize |
| *BUF using xrealloc if necessary to hold the result, and update |
| *SIZEOF_BUF. */ |
| |
| static void |
| remote_send (char **buf, |
| long *sizeof_buf) |
| { |
| putpkt (*buf); |
| getpkt (buf, sizeof_buf, 0); |
| |
| if ((*buf)[0] == 'E') |
| error (_("Remote failure reply: %s"), *buf); |
| } |
| |
| /* Return a pointer to an xmalloc'ed string representing an escaped |
| version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t, |
| etc. The caller is responsible for releasing the returned |
| memory. */ |
| |
| static char * |
| escape_buffer (const char *buf, int n) |
| { |
| struct cleanup *old_chain; |
| struct ui_file *stb; |
| char *str; |
| |
| stb = mem_fileopen (); |
| old_chain = make_cleanup_ui_file_delete (stb); |
| |
| fputstrn_unfiltered (buf, n, '\\', stb); |
| str = ui_file_xstrdup (stb, NULL); |
| do_cleanups (old_chain); |
| return str; |
| } |
| |
| /* Display a null-terminated packet on stdout, for debugging, using C |
| string notation. */ |
| |
| static void |
| print_packet (const char *buf) |
| { |
| puts_filtered ("\""); |
| fputstr_filtered (buf, '"', gdb_stdout); |
| puts_filtered ("\""); |
| } |
| |
| int |
| putpkt (const char *buf) |
| { |
| return putpkt_binary (buf, strlen (buf)); |
| } |
| |
| /* Send a packet to the remote machine, with error checking. The data |
| of the packet is in BUF. The string in BUF can be at most |
| get_remote_packet_size () - 5 to account for the $, # and checksum, |
| and for a possible /0 if we are debugging (remote_debug) and want |
| to print the sent packet as a string. */ |
| |
| static int |
| putpkt_binary (const char *buf, int cnt) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int i; |
| unsigned char csum = 0; |
| char *buf2 = (char *) xmalloc (cnt + 6); |
| struct cleanup *old_chain = make_cleanup (xfree, buf2); |
| |
| int ch; |
| int tcount = 0; |
| char *p; |
| |
| /* Catch cases like trying to read memory or listing threads while |
| we're waiting for a stop reply. The remote server wouldn't be |
| ready to handle this request, so we'd hang and timeout. We don't |
| have to worry about this in synchronous mode, because in that |
| case it's not possible to issue a command while the target is |
| running. This is not a problem in non-stop mode, because in that |
| case, the stub is always ready to process serial input. */ |
| if (!target_is_non_stop_p () |
| && target_is_async_p () |
| && rs->waiting_for_stop_reply) |
| { |
| error (_("Cannot execute this command while the target is running.\n" |
| "Use the \"interrupt\" command to stop the target\n" |
| "and then try again.")); |
| } |
| |
| /* We're sending out a new packet. Make sure we don't look at a |
| stale cached response. */ |
| rs->cached_wait_status = 0; |
| |
| /* Copy the packet into buffer BUF2, encapsulating it |
| and giving it a checksum. */ |
| |
| p = buf2; |
| *p++ = '$'; |
| |
| for (i = 0; i < cnt; i++) |
| { |
| csum += buf[i]; |
| *p++ = buf[i]; |
| } |
| *p++ = '#'; |
| *p++ = tohex ((csum >> 4) & 0xf); |
| *p++ = tohex (csum & 0xf); |
| |
| /* Send it over and over until we get a positive ack. */ |
| |
| while (1) |
| { |
| int started_error_output = 0; |
| |
| if (remote_debug) |
| { |
| struct cleanup *old_chain; |
| char *str; |
| |
| *p = '\0'; |
| str = escape_buffer (buf2, p - buf2); |
| old_chain = make_cleanup (xfree, str); |
| fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str); |
| gdb_flush (gdb_stdlog); |
| do_cleanups (old_chain); |
| } |
| remote_serial_write (buf2, p - buf2); |
| |
| /* If this is a no acks version of the remote protocol, send the |
| packet and move on. */ |
| if (rs->noack_mode) |
| break; |
| |
| /* Read until either a timeout occurs (-2) or '+' is read. |
| Handle any notification that arrives in the mean time. */ |
| while (1) |
| { |
| ch = readchar (remote_timeout); |
| |
| if (remote_debug) |
| { |
| switch (ch) |
| { |
| case '+': |
| case '-': |
| case SERIAL_TIMEOUT: |
| case '$': |
| case '%': |
| if (started_error_output) |
| { |
| putchar_unfiltered ('\n'); |
| started_error_output = 0; |
| } |
| } |
| } |
| |
| switch (ch) |
| { |
| case '+': |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
| do_cleanups (old_chain); |
| return 1; |
| case '-': |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "Nak\n"); |
| /* FALLTHROUGH */ |
| case SERIAL_TIMEOUT: |
| tcount++; |
| if (tcount > 3) |
| { |
| do_cleanups (old_chain); |
| return 0; |
| } |
| break; /* Retransmit buffer. */ |
| case '$': |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Packet instead of Ack, ignoring it\n"); |
| /* It's probably an old response sent because an ACK |
| was lost. Gobble up the packet and ack it so it |
| doesn't get retransmitted when we resend this |
| packet. */ |
| skip_frame (); |
| remote_serial_write ("+", 1); |
| continue; /* Now, go look for +. */ |
| } |
| |
| case '%': |
| { |
| int val; |
| |
| /* If we got a notification, handle it, and go back to looking |
| for an ack. */ |
| /* We've found the start of a notification. Now |
| collect the data. */ |
| val = read_frame (&rs->buf, &rs->buf_size); |
| if (val >= 0) |
| { |
| if (remote_debug) |
| { |
| struct cleanup *old_chain; |
| char *str; |
| |
| str = escape_buffer (rs->buf, val); |
| old_chain = make_cleanup (xfree, str); |
| fprintf_unfiltered (gdb_stdlog, |
| " Notification received: %s\n", |
| str); |
| do_cleanups (old_chain); |
| } |
| handle_notification (rs->notif_state, rs->buf); |
| /* We're in sync now, rewait for the ack. */ |
| tcount = 0; |
| } |
| else |
| { |
| if (remote_debug) |
| { |
| if (!started_error_output) |
| { |
| started_error_output = 1; |
| fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| } |
| fputc_unfiltered (ch & 0177, gdb_stdlog); |
| fprintf_unfiltered (gdb_stdlog, "%s", rs->buf); |
| } |
| } |
| continue; |
| } |
| /* fall-through */ |
| default: |
| if (remote_debug) |
| { |
| if (!started_error_output) |
| { |
| started_error_output = 1; |
| fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
| } |
| fputc_unfiltered (ch & 0177, gdb_stdlog); |
| } |
| continue; |
| } |
| break; /* Here to retransmit. */ |
| } |
| |
| #if 0 |
| /* This is wrong. If doing a long backtrace, the user should be |
| able to get out next time we call QUIT, without anything as |
| violent as interrupt_query. If we want to provide a way out of |
| here without getting to the next QUIT, it should be based on |
| hitting ^C twice as in remote_wait. */ |
| if (quit_flag) |
| { |
| quit_flag = 0; |
| interrupt_query (); |
| } |
| #endif |
| } |
| |
| do_cleanups (old_chain); |
| return 0; |
| } |
| |
| /* Come here after finding the start of a frame when we expected an |
| ack. Do our best to discard the rest of this packet. */ |
| |
| static void |
| skip_frame (void) |
| { |
| int c; |
| |
| while (1) |
| { |
| c = readchar (remote_timeout); |
| switch (c) |
| { |
| case SERIAL_TIMEOUT: |
| /* Nothing we can do. */ |
| return; |
| case '#': |
| /* Discard the two bytes of checksum and stop. */ |
| c = readchar (remote_timeout); |
| if (c >= 0) |
| c = readchar (remote_timeout); |
| |
| return; |
| case '*': /* Run length encoding. */ |
| /* Discard the repeat count. */ |
| c = readchar (remote_timeout); |
| if (c < 0) |
| return; |
| break; |
| default: |
| /* A regular character. */ |
| break; |
| } |
| } |
| } |
| |
| /* Come here after finding the start of the frame. Collect the rest |
| into *BUF, verifying the checksum, length, and handling run-length |
| compression. NUL terminate the buffer. If there is not enough room, |
| expand *BUF using xrealloc. |
| |
| Returns -1 on error, number of characters in buffer (ignoring the |
| trailing NULL) on success. (could be extended to return one of the |
| SERIAL status indications). */ |
| |
| static long |
| read_frame (char **buf_p, |
| long *sizeof_buf) |
| { |
| unsigned char csum; |
| long bc; |
| int c; |
| char *buf = *buf_p; |
| struct remote_state *rs = get_remote_state (); |
| |
| csum = 0; |
| bc = 0; |
| |
| while (1) |
| { |
| c = readchar (remote_timeout); |
| switch (c) |
| { |
| case SERIAL_TIMEOUT: |
| if (remote_debug) |
| fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); |
| return -1; |
| case '$': |
| if (remote_debug) |
| fputs_filtered ("Saw new packet start in middle of old one\n", |
| gdb_stdlog); |
| return -1; /* Start a new packet, count retries. */ |
| case '#': |
| { |
| unsigned char pktcsum; |
| int check_0 = 0; |
| int check_1 = 0; |
| |
| buf[bc] = '\0'; |
| |
| check_0 = readchar (remote_timeout); |
| if (check_0 >= 0) |
| check_1 = readchar (remote_timeout); |
| |
| if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) |
| { |
| if (remote_debug) |
| fputs_filtered ("Timeout in checksum, retrying\n", |
| gdb_stdlog); |
| return -1; |
| } |
| else if (check_0 < 0 || check_1 < 0) |
| { |
| if (remote_debug) |
| fputs_filtered ("Communication error in checksum\n", |
| gdb_stdlog); |
| return -1; |
| } |
| |
| /* Don't recompute the checksum; with no ack packets we |
| don't have any way to indicate a packet retransmission |
| is necessary. */ |
| if (rs->noack_mode) |
| return bc; |
| |
| pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); |
| if (csum == pktcsum) |
| return bc; |
| |
| if (remote_debug) |
| { |
| struct cleanup *old_chain; |
| char *str; |
| |
| str = escape_buffer (buf, bc); |
| old_chain = make_cleanup (xfree, str); |
| fprintf_unfiltered (gdb_stdlog, |
| "Bad checksum, sentsum=0x%x, " |
| "csum=0x%x, buf=%s\n", |
| pktcsum, csum, str); |
| do_cleanups (old_chain); |
| } |
| /* Number of characters in buffer ignoring trailing |
| NULL. */ |
| return -1; |
| } |
| case '*': /* Run length encoding. */ |
| { |
| int repeat; |
| |
| csum += c; |
| c = readchar (remote_timeout); |
| csum += c; |
| repeat = c - ' ' + 3; /* Compute repeat count. */ |
| |
| /* The character before ``*'' is repeated. */ |
| |
| if (repeat > 0 && repeat <= 255 && bc > 0) |
| { |
| if (bc + repeat - 1 >= *sizeof_buf - 1) |
| { |
| /* Make some more room in the buffer. */ |
| *sizeof_buf += repeat; |
| *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); |
| buf = *buf_p; |
| } |
| |
| memset (&buf[bc], buf[bc - 1], repeat); |
| bc += repeat; |
| continue; |
| } |
| |
| buf[bc] = '\0'; |
| printf_filtered (_("Invalid run length encoding: %s\n"), buf); |
| return -1; |
| } |
| default: |
| if (bc >= *sizeof_buf - 1) |
| { |
| /* Make some more room in the buffer. */ |
| *sizeof_buf *= 2; |
| *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf); |
| buf = *buf_p; |
| } |
| |
| buf[bc++] = c; |
| csum += c; |
| continue; |
| } |
| } |
| } |
| |
| /* Read a packet from the remote machine, with error checking, and |
| store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| rather than timing out; this is used (in synchronous mode) to wait |
| for a target that is is executing user code to stop. */ |
| /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we |
| don't have to change all the calls to getpkt to deal with the |
| return value, because at the moment I don't know what the right |
| thing to do it for those. */ |
| void |
| getpkt (char **buf, |
| long *sizeof_buf, |
| int forever) |
| { |
| getpkt_sane (buf, sizeof_buf, forever); |
| } |
| |
| |
| /* Read a packet from the remote machine, with error checking, and |
| store it in *BUF. Resize *BUF using xrealloc if necessary to hold |
| the result, and update *SIZEOF_BUF. If FOREVER, wait forever |
| rather than timing out; this is used (in synchronous mode) to wait |
| for a target that is is executing user code to stop. If FOREVER == |
| 0, this function is allowed to time out gracefully and return an |
| indication of this to the caller. Otherwise return the number of |
| bytes read. If EXPECTING_NOTIF, consider receiving a notification |
| enough reason to return to the caller. *IS_NOTIF is an output |
| boolean that indicates whether *BUF holds a notification or not |
| (a regular packet). */ |
| |
| static int |
| getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever, |
| int expecting_notif, int *is_notif) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int c; |
| int tries; |
| int timeout; |
| int val = -1; |
| |
| /* We're reading a new response. Make sure we don't look at a |
| previously cached response. */ |
| rs->cached_wait_status = 0; |
| |
| strcpy (*buf, "timeout"); |
| |
| if (forever) |
| timeout = watchdog > 0 ? watchdog : -1; |
| else if (expecting_notif) |
| timeout = 0; /* There should already be a char in the buffer. If |
| not, bail out. */ |
| else |
| timeout = remote_timeout; |
| |
| #define MAX_TRIES 3 |
| |
| /* Process any number of notifications, and then return when |
| we get a packet. */ |
| for (;;) |
| { |
| /* If we get a timeout or bad checksum, retry up to MAX_TRIES |
| times. */ |
| for (tries = 1; tries <= MAX_TRIES; tries++) |
| { |
| /* This can loop forever if the remote side sends us |
| characters continuously, but if it pauses, we'll get |
| SERIAL_TIMEOUT from readchar because of timeout. Then |
| we'll count that as a retry. |
| |
| Note that even when forever is set, we will only wait |
| forever prior to the start of a packet. After that, we |
| expect characters to arrive at a brisk pace. They should |
| show up within remote_timeout intervals. */ |
| do |
| c = readchar (timeout); |
| while (c != SERIAL_TIMEOUT && c != '$' && c != '%'); |
| |
| if (c == SERIAL_TIMEOUT) |
| { |
| if (expecting_notif) |
| return -1; /* Don't complain, it's normal to not get |
| anything in this case. */ |
| |
| if (forever) /* Watchdog went off? Kill the target. */ |
| { |
| QUIT; |
| remote_unpush_target (); |
| throw_error (TARGET_CLOSE_ERROR, |
| _("Watchdog timeout has expired. " |
| "Target detached.")); |
| } |
| if (remote_debug) |
| fputs_filtered ("Timed out.\n", gdb_stdlog); |
| } |
| else |
| { |
| /* We've found the start of a packet or notification. |
| Now collect the data. */ |
| val = read_frame (buf, sizeof_buf); |
| if (val >= 0) |
| break; |
| } |
| |
| remote_serial_write ("-", 1); |
| } |
| |
| if (tries > MAX_TRIES) |
| { |
| /* We have tried hard enough, and just can't receive the |
| packet/notification. Give up. */ |
| printf_unfiltered (_("Ignoring packet error, continuing...\n")); |
| |
| /* Skip the ack char if we're in no-ack mode. */ |
| if (!rs->noack_mode) |
| remote_serial_write ("+", 1); |
| return -1; |
| } |
| |
| /* If we got an ordinary packet, return that to our caller. */ |
| if (c == '$') |
| { |
| if (remote_debug) |
| { |
| struct cleanup *old_chain; |
| char *str; |
| |
| str = escape_buffer (*buf, val); |
| old_chain = make_cleanup (xfree, str); |
| fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str); |
| do_cleanups (old_chain); |
| } |
| |
| /* Skip the ack char if we're in no-ack mode. */ |
| if (!rs->noack_mode) |
| remote_serial_write ("+", 1); |
| if (is_notif != NULL) |
| *is_notif = 0; |
| return val; |
| } |
| |
| /* If we got a notification, handle it, and go back to looking |
| for a packet. */ |
| else |
| { |
| gdb_assert (c == '%'); |
| |
| if (remote_debug) |
| { |
| struct cleanup *old_chain; |
| char *str; |
| |
| str = escape_buffer (*buf, val); |
| old_chain = make_cleanup (xfree, str); |
| fprintf_unfiltered (gdb_stdlog, |
| " Notification received: %s\n", |
| str); |
| do_cleanups (old_chain); |
| } |
| if (is_notif != NULL) |
| *is_notif = 1; |
| |
| handle_notification (rs->notif_state, *buf); |
| |
| /* Notifications require no acknowledgement. */ |
| |
| if (expecting_notif) |
| return val; |
| } |
| } |
| } |
| |
| static int |
| getpkt_sane (char **buf, long *sizeof_buf, int forever) |
| { |
| return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL); |
| } |
| |
| static int |
| getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever, |
| int *is_notif) |
| { |
| return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1, |
| is_notif); |
| } |
| |
| /* Check whether EVENT is a fork event for the process specified |
| by the pid passed in DATA, and if it is, kill the fork child. */ |
| |
| static int |
| kill_child_of_pending_fork (QUEUE (stop_reply_p) *q, |
| QUEUE_ITER (stop_reply_p) *iter, |
| stop_reply_p event, |
| void *data) |
| { |
| struct queue_iter_param *param = (struct queue_iter_param *) data; |
| int parent_pid = *(int *) param->input; |
| |
| if (is_pending_fork_parent (&event->ws, parent_pid, event->ptid)) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int child_pid = ptid_get_pid (event->ws.value.related_pid); |
| int res; |
| |
| res = remote_vkill (child_pid, rs); |
| if (res != 0) |
| error (_("Can't kill fork child process %d"), child_pid); |
| } |
| |
| return 1; |
| } |
| |
| /* Kill any new fork children of process PID that haven't been |
| processed by follow_fork. */ |
| |
| static void |
| kill_new_fork_children (int pid, struct remote_state *rs) |
| { |
| struct thread_info *thread; |
| struct notif_client *notif = ¬if_client_stop; |
| struct queue_iter_param param; |
| |
| /* Kill the fork child threads of any threads in process PID |
| that are stopped at a fork event. */ |
| ALL_NON_EXITED_THREADS (thread) |
| { |
| struct target_waitstatus *ws = &thread->pending_follow; |
| |
| if (is_pending_fork_parent (ws, pid, thread->ptid)) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int child_pid = ptid_get_pid (ws->value.related_pid); |
| int res; |
| |
| res = remote_vkill (child_pid, rs); |
| if (res != 0) |
| error (_("Can't kill fork child process %d"), child_pid); |
| } |
| } |
| |
| /* Check for any pending fork events (not reported or processed yet) |
| in process PID and kill those fork child threads as well. */ |
| remote_notif_get_pending_events (notif); |
| param.input = &pid; |
| param.output = NULL; |
| QUEUE_iterate (stop_reply_p, stop_reply_queue, |
| kill_child_of_pending_fork, ¶m); |
| } |
| |
| |
| /* Target hook to kill the current inferior. */ |
| |
| static void |
| remote_kill (struct target_ops *ops) |
| { |
| int res = -1; |
| int pid = ptid_get_pid (inferior_ptid); |
| struct remote_state *rs = get_remote_state (); |
| |
| if (packet_support (PACKET_vKill) != PACKET_DISABLE) |
| { |
| /* If we're stopped while forking and we haven't followed yet, |
| kill the child task. We need to do this before killing the |
| parent task because if this is a vfork then the parent will |
| be sleeping. */ |
| kill_new_fork_children (pid, rs); |
| |
| res = remote_vkill (pid, rs); |
| if (res == 0) |
| { |
| target_mourn_inferior (); |
| return; |
| } |
| } |
| |
| /* If we are in 'target remote' mode and we are killing the only |
| inferior, then we will tell gdbserver to exit and unpush the |
| target. */ |
| if (res == -1 && !remote_multi_process_p (rs) |
| && number_of_live_inferiors () == 1) |
| { |
| remote_kill_k (); |
| |
| /* We've killed the remote end, we get to mourn it. If we are |
| not in extended mode, mourning the inferior also unpushes |
| remote_ops from the target stack, which closes the remote |
| connection. */ |
| target_mourn_inferior (); |
| |
| return; |
| } |
| |
| error (_("Can't kill process")); |
| } |
| |
| /* Send a kill request to the target using the 'vKill' packet. */ |
| |
| static int |
| remote_vkill (int pid, struct remote_state *rs) |
| { |
| if (packet_support (PACKET_vKill) == PACKET_DISABLE) |
| return -1; |
| |
| /* Tell the remote target to detach. */ |
| xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_vKill])) |
| { |
| case PACKET_OK: |
| return 0; |
| case PACKET_ERROR: |
| return 1; |
| case PACKET_UNKNOWN: |
| return -1; |
| default: |
| internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); |
| } |
| } |
| |
| /* Send a kill request to the target using the 'k' packet. */ |
| |
| static void |
| remote_kill_k (void) |
| { |
| /* Catch errors so the user can quit from gdb even when we |
| aren't on speaking terms with the remote system. */ |
| TRY |
| { |
| putpkt ("k"); |
| } |
| CATCH (ex, RETURN_MASK_ERROR) |
| { |
| if (ex.error == TARGET_CLOSE_ERROR) |
| { |
| /* If we got an (EOF) error that caused the target |
| to go away, then we're done, that's what we wanted. |
| "k" is susceptible to cause a premature EOF, given |
| that the remote server isn't actually required to |
| reply to "k", and it can happen that it doesn't |
| even get to reply ACK to the "k". */ |
| return; |
| } |
| |
| /* Otherwise, something went wrong. We didn't actually kill |
| the target. Just propagate the exception, and let the |
| user or higher layers decide what to do. */ |
| throw_exception (ex); |
| } |
| END_CATCH |
| } |
| |
| static void |
| remote_mourn (struct target_ops *target) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* In 'target remote' mode with one inferior, we close the connection. */ |
| if (!rs->extended && number_of_live_inferiors () <= 1) |
| { |
| unpush_target (target); |
| |
| /* remote_close takes care of doing most of the clean up. */ |
| generic_mourn_inferior (); |
| return; |
| } |
| |
| /* In case we got here due to an error, but we're going to stay |
| connected. */ |
| rs->waiting_for_stop_reply = 0; |
| |
| /* If the current general thread belonged to the process we just |
| detached from or has exited, the remote side current general |
| thread becomes undefined. Considering a case like this: |
| |
| - We just got here due to a detach. |
| - The process that we're detaching from happens to immediately |
| report a global breakpoint being hit in non-stop mode, in the |
| same thread we had selected before. |
| - GDB attaches to this process again. |
| - This event happens to be the next event we handle. |
| |
| GDB would consider that the current general thread didn't need to |
| be set on the stub side (with Hg), since for all it knew, |
| GENERAL_THREAD hadn't changed. |
| |
| Notice that although in all-stop mode, the remote server always |
| sets the current thread to the thread reporting the stop event, |
| that doesn't happen in non-stop mode; in non-stop, the stub *must |
| not* change the current thread when reporting a breakpoint hit, |
| due to the decoupling of event reporting and event handling. |
| |
| To keep things simple, we always invalidate our notion of the |
| current thread. */ |
| record_currthread (rs, minus_one_ptid); |
| |
| /* Call common code to mark the inferior as not running. */ |
| generic_mourn_inferior (); |
| |
| if (!have_inferiors ()) |
| { |
| if (!remote_multi_process_p (rs)) |
| { |
| /* Check whether the target is running now - some remote stubs |
| automatically restart after kill. */ |
| putpkt ("?"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (rs->buf[0] == 'S' || rs->buf[0] == 'T') |
| { |
| /* Assume that the target has been restarted. Set |
| inferior_ptid so that bits of core GDB realizes |
| there's something here, e.g., so that the user can |
| say "kill" again. */ |
| inferior_ptid = magic_null_ptid; |
| } |
| } |
| } |
| } |
| |
| static int |
| extended_remote_supports_disable_randomization (struct target_ops *self) |
| { |
| return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE; |
| } |
| |
| static void |
| extended_remote_disable_randomization (int val) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x", |
| val); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| error (_("Target does not support QDisableRandomization.")); |
| if (strcmp (reply, "OK") != 0) |
| error (_("Bogus QDisableRandomization reply from target: %s"), reply); |
| } |
| |
| static int |
| extended_remote_run (char *args) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int len; |
| const char *remote_exec_file = get_remote_exec_file (); |
| |
| /* If the user has disabled vRun support, or we have detected that |
| support is not available, do not try it. */ |
| if (packet_support (PACKET_vRun) == PACKET_DISABLE) |
| return -1; |
| |
| strcpy (rs->buf, "vRun;"); |
| len = strlen (rs->buf); |
| |
| if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ()) |
| error (_("Remote file name too long for run packet")); |
| len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, |
| strlen (remote_exec_file)); |
| |
| gdb_assert (args != NULL); |
| if (*args) |
| { |
| struct cleanup *back_to; |
| int i; |
| char **argv; |
| |
| argv = gdb_buildargv (args); |
| back_to = make_cleanup_freeargv (argv); |
| for (i = 0; argv[i] != NULL; i++) |
| { |
| if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ()) |
| error (_("Argument list too long for run packet")); |
| rs->buf[len++] = ';'; |
| len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, |
| strlen (argv[i])); |
| } |
| do_cleanups (back_to); |
| } |
| |
| rs->buf[len++] = '\0'; |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun])) |
| { |
| case PACKET_OK: |
| /* We have a wait response. All is well. */ |
| return 0; |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_ERROR: |
| if (remote_exec_file[0] == '\0') |
| error (_("Running the default executable on the remote target failed; " |
| "try \"set remote exec-file\"?")); |
| else |
| error (_("Running \"%s\" on the remote target failed"), |
| remote_exec_file); |
| default: |
| gdb_assert_not_reached (_("bad switch")); |
| } |
| } |
| |
| /* In the extended protocol we want to be able to do things like |
| "run" and have them basically work as expected. So we need |
| a special create_inferior function. We support changing the |
| executable file and the command line arguments, but not the |
| environment. */ |
| |
| static void |
| extended_remote_create_inferior (struct target_ops *ops, |
| char *exec_file, char *args, |
| char **env, int from_tty) |
| { |
| int run_worked; |
| char *stop_reply; |
| struct remote_state *rs = get_remote_state (); |
| const char *remote_exec_file = get_remote_exec_file (); |
| |
| /* If running asynchronously, register the target file descriptor |
| with the event loop. */ |
| if (target_can_async_p ()) |
| target_async (1); |
| |
| /* Disable address space randomization if requested (and supported). */ |
| if (extended_remote_supports_disable_randomization (ops)) |
| extended_remote_disable_randomization (disable_randomization); |
| |
| /* Now restart the remote server. */ |
| run_worked = extended_remote_run (args) != -1; |
| if (!run_worked) |
| { |
| /* vRun was not supported. Fail if we need it to do what the |
| user requested. */ |
| if (remote_exec_file[0]) |
| error (_("Remote target does not support \"set remote exec-file\"")); |
| if (args[0]) |
| error (_("Remote target does not support \"set args\" or run <ARGS>")); |
| |
| /* Fall back to "R". */ |
| extended_remote_restart (); |
| } |
| |
| if (!have_inferiors ()) |
| { |
| /* Clean up from the last time we ran, before we mark the target |
| running again. This will mark breakpoints uninserted, and |
| get_offsets may insert breakpoints. */ |
| init_thread_list (); |
| init_wait_for_inferior (); |
| } |
| |
| /* vRun's success return is a stop reply. */ |
| stop_reply = run_worked ? rs->buf : NULL; |
| add_current_inferior_and_thread (stop_reply); |
| |
| /* Get updated offsets, if the stub uses qOffsets. */ |
| get_offsets (); |
| } |
| |
| |
| /* Given a location's target info BP_TGT and the packet buffer BUF, output |
| the list of conditions (in agent expression bytecode format), if any, the |
| target needs to evaluate. The output is placed into the packet buffer |
| started from BUF and ended at BUF_END. */ |
| |
| static int |
| remote_add_target_side_condition (struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt, char *buf, |
| char *buf_end) |
| { |
| struct agent_expr *aexpr = NULL; |
| int i, ix; |
| |
| if (VEC_empty (agent_expr_p, bp_tgt->conditions)) |
| return 0; |
| |
| buf += strlen (buf); |
| xsnprintf (buf, buf_end - buf, "%s", ";"); |
| buf++; |
| |
| /* Send conditions to the target and free the vector. */ |
| for (ix = 0; |
| VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr); |
| ix++) |
| { |
| xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len); |
| buf += strlen (buf); |
| for (i = 0; i < aexpr->len; ++i) |
| buf = pack_hex_byte (buf, aexpr->buf[i]); |
| *buf = '\0'; |
| } |
| return 0; |
| } |
| |
| static void |
| remote_add_target_side_commands (struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt, char *buf) |
| { |
| struct agent_expr *aexpr = NULL; |
| int i, ix; |
| |
| if (VEC_empty (agent_expr_p, bp_tgt->tcommands)) |
| return; |
| |
| buf += strlen (buf); |
| |
| sprintf (buf, ";cmds:%x,", bp_tgt->persist); |
| buf += strlen (buf); |
| |
| /* Concatenate all the agent expressions that are commands into the |
| cmds parameter. */ |
| for (ix = 0; |
| VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr); |
| ix++) |
| { |
| sprintf (buf, "X%x,", aexpr->len); |
| buf += strlen (buf); |
| for (i = 0; i < aexpr->len; ++i) |
| buf = pack_hex_byte (buf, aexpr->buf[i]); |
| *buf = '\0'; |
| } |
| } |
| |
| /* Insert a breakpoint. On targets that have software breakpoint |
| support, we ask the remote target to do the work; on targets |
| which don't, we insert a traditional memory breakpoint. */ |
| |
| static int |
| remote_insert_breakpoint (struct target_ops *ops, |
| struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| /* Try the "Z" s/w breakpoint packet if it is not already disabled. |
| If it succeeds, then set the support to PACKET_ENABLE. If it |
| fails, and the user has explicitly requested the Z support then |
| report an error, otherwise, mark it disabled and go on. */ |
| |
| if (packet_support (PACKET_Z0) != PACKET_DISABLE) |
| { |
| CORE_ADDR addr = bp_tgt->reqstd_address; |
| struct remote_state *rs; |
| char *p, *endbuf; |
| int bpsize; |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize); |
| |
| rs = get_remote_state (); |
| p = rs->buf; |
| endbuf = rs->buf + get_remote_packet_size (); |
| |
| *(p++) = 'Z'; |
| *(p++) = '0'; |
| *(p++) = ','; |
| addr = (ULONGEST) remote_address_masked (addr); |
| p += hexnumstr (p, addr); |
| xsnprintf (p, endbuf - p, ",%d", bpsize); |
| |
| if (remote_supports_cond_breakpoints (ops)) |
| remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); |
| |
| if (remote_can_run_breakpoint_commands (ops)) |
| remote_add_target_side_commands (gdbarch, bp_tgt, p); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0])) |
| { |
| case PACKET_ERROR: |
| return -1; |
| case PACKET_OK: |
| bp_tgt->placed_address = addr; |
| bp_tgt->placed_size = bpsize; |
| return 0; |
| case PACKET_UNKNOWN: |
| break; |
| } |
| } |
| |
| /* If this breakpoint has target-side commands but this stub doesn't |
| support Z0 packets, throw error. */ |
| if (!VEC_empty (agent_expr_p, bp_tgt->tcommands)) |
| throw_error (NOT_SUPPORTED_ERROR, _("\ |
| Target doesn't support breakpoints that have target side commands.")); |
| |
| return memory_insert_breakpoint (ops, gdbarch, bp_tgt); |
| } |
| |
| static int |
| remote_remove_breakpoint (struct target_ops *ops, |
| struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| CORE_ADDR addr = bp_tgt->placed_address; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (packet_support (PACKET_Z0) != PACKET_DISABLE) |
| { |
| char *p = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| *(p++) = 'z'; |
| *(p++) = '0'; |
| *(p++) = ','; |
| |
| addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); |
| p += hexnumstr (p, addr); |
| xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| return (rs->buf[0] == 'E'); |
| } |
| |
| return memory_remove_breakpoint (ops, gdbarch, bp_tgt); |
| } |
| |
| static enum Z_packet_type |
| watchpoint_to_Z_packet (int type) |
| { |
| switch (type) |
| { |
| case hw_write: |
| return Z_PACKET_WRITE_WP; |
| break; |
| case hw_read: |
| return Z_PACKET_READ_WP; |
| break; |
| case hw_access: |
| return Z_PACKET_ACCESS_WP; |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, |
| _("hw_bp_to_z: bad watchpoint type %d"), type); |
| } |
| } |
| |
| static int |
| remote_insert_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, |
| enum target_hw_bp_type type, struct expression *cond) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| char *p; |
| enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| |
| if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) |
| return 1; |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet); |
| p = strchr (rs->buf, '\0'); |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| xsnprintf (p, endbuf - p, ",%x", len); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| { |
| case PACKET_ERROR: |
| return -1; |
| case PACKET_UNKNOWN: |
| return 1; |
| case PACKET_OK: |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| _("remote_insert_watchpoint: reached end of function")); |
| } |
| |
| static int |
| remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr, |
| CORE_ADDR start, int length) |
| { |
| CORE_ADDR diff = remote_address_masked (addr - start); |
| |
| return diff < length; |
| } |
| |
| |
| static int |
| remote_remove_watchpoint (struct target_ops *self, CORE_ADDR addr, int len, |
| enum target_hw_bp_type type, struct expression *cond) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| char *p; |
| enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| |
| if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE) |
| return -1; |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet); |
| p = strchr (rs->buf, '\0'); |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| xsnprintf (p, endbuf - p, ",%x", len); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) |
| { |
| case PACKET_ERROR: |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_OK: |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| _("remote_remove_watchpoint: reached end of function")); |
| } |
| |
| |
| int remote_hw_watchpoint_limit = -1; |
| int remote_hw_watchpoint_length_limit = -1; |
| int remote_hw_breakpoint_limit = -1; |
| |
| static int |
| remote_region_ok_for_hw_watchpoint (struct target_ops *self, |
| CORE_ADDR addr, int len) |
| { |
| if (remote_hw_watchpoint_length_limit == 0) |
| return 0; |
| else if (remote_hw_watchpoint_length_limit < 0) |
| return 1; |
| else if (len <= remote_hw_watchpoint_length_limit) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int |
| remote_check_watch_resources (struct target_ops *self, |
| enum bptype type, int cnt, int ot) |
| { |
| if (type == bp_hardware_breakpoint) |
| { |
| if (remote_hw_breakpoint_limit == 0) |
| return 0; |
| else if (remote_hw_breakpoint_limit < 0) |
| return 1; |
| else if (cnt <= remote_hw_breakpoint_limit) |
| return 1; |
| } |
| else |
| { |
| if (remote_hw_watchpoint_limit == 0) |
| return 0; |
| else if (remote_hw_watchpoint_limit < 0) |
| return 1; |
| else if (ot) |
| return -1; |
| else if (cnt <= remote_hw_watchpoint_limit) |
| return 1; |
| } |
| return -1; |
| } |
| |
| /* The to_stopped_by_sw_breakpoint method of target remote. */ |
| |
| static int |
| remote_stopped_by_sw_breakpoint (struct target_ops *ops) |
| { |
| struct thread_info *thread = inferior_thread (); |
| |
| return (thread->priv != NULL |
| && thread->priv->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT); |
| } |
| |
| /* The to_supports_stopped_by_sw_breakpoint method of target |
| remote. */ |
| |
| static int |
| remote_supports_stopped_by_sw_breakpoint (struct target_ops *ops) |
| { |
| return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE); |
| } |
| |
| /* The to_stopped_by_hw_breakpoint method of target remote. */ |
| |
| static int |
| remote_stopped_by_hw_breakpoint (struct target_ops *ops) |
| { |
| struct thread_info *thread = inferior_thread (); |
| |
| return (thread->priv != NULL |
| && thread->priv->stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT); |
| } |
| |
| /* The to_supports_stopped_by_hw_breakpoint method of target |
| remote. */ |
| |
| static int |
| remote_supports_stopped_by_hw_breakpoint (struct target_ops *ops) |
| { |
| return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE); |
| } |
| |
| static int |
| remote_stopped_by_watchpoint (struct target_ops *ops) |
| { |
| struct thread_info *thread = inferior_thread (); |
| |
| return (thread->priv != NULL |
| && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); |
| } |
| |
| static int |
| remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) |
| { |
| struct thread_info *thread = inferior_thread (); |
| |
| if (thread->priv != NULL |
| && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT) |
| { |
| *addr_p = thread->priv->watch_data_address; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| static int |
| remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| CORE_ADDR addr = bp_tgt->reqstd_address; |
| struct remote_state *rs; |
| char *p, *endbuf; |
| char *message; |
| int bpsize; |
| |
| /* The length field should be set to the size of a breakpoint |
| instruction, even though we aren't inserting one ourselves. */ |
| |
| gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize); |
| |
| if (packet_support (PACKET_Z1) == PACKET_DISABLE) |
| return -1; |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| rs = get_remote_state (); |
| p = rs->buf; |
| endbuf = rs->buf + get_remote_packet_size (); |
| |
| *(p++) = 'Z'; |
| *(p++) = '1'; |
| *(p++) = ','; |
| |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| xsnprintf (p, endbuf - p, ",%x", bpsize); |
| |
| if (remote_supports_cond_breakpoints (self)) |
| remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf); |
| |
| if (remote_can_run_breakpoint_commands (self)) |
| remote_add_target_side_commands (gdbarch, bp_tgt, p); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| { |
| case PACKET_ERROR: |
| if (rs->buf[1] == '.') |
| { |
| message = strchr (rs->buf + 2, '.'); |
| if (message) |
| error (_("Remote failure reply: %s"), message + 1); |
| } |
| return -1; |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_OK: |
| bp_tgt->placed_address = addr; |
| bp_tgt->placed_size = bpsize; |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| _("remote_insert_hw_breakpoint: reached end of function")); |
| } |
| |
| |
| static int |
| remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| CORE_ADDR addr; |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| |
| if (packet_support (PACKET_Z1) == PACKET_DISABLE) |
| return -1; |
| |
| /* Make sure the remote is pointing at the right process, if |
| necessary. */ |
| if (!gdbarch_has_global_breakpoints (target_gdbarch ())) |
| set_general_process (); |
| |
| *(p++) = 'z'; |
| *(p++) = '1'; |
| *(p++) = ','; |
| |
| addr = remote_address_masked (bp_tgt->placed_address); |
| p += hexnumstr (p, (ULONGEST) addr); |
| xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size); |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) |
| { |
| case PACKET_ERROR: |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_OK: |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| _("remote_remove_hw_breakpoint: reached end of function")); |
| } |
| |
| /* Verify memory using the "qCRC:" request. */ |
| |
| static int |
| remote_verify_memory (struct target_ops *ops, |
| const gdb_byte *data, CORE_ADDR lma, ULONGEST size) |
| { |
| struct remote_state *rs = get_remote_state (); |
| unsigned long host_crc, target_crc; |
| char *tmp; |
| |
| /* It doesn't make sense to use qCRC if the remote target is |
| connected but not running. */ |
| if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE) |
| { |
| enum packet_result result; |
| |
| /* Make sure the remote is pointing at the right process. */ |
| set_general_process (); |
| |
| /* FIXME: assumes lma can fit into long. */ |
| xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx", |
| (long) lma, (long) size); |
| putpkt (rs->buf); |
| |
| /* Be clever; compute the host_crc before waiting for target |
| reply. */ |
| host_crc = xcrc32 (data, size, 0xffffffff); |
| |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| result = packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_qCRC]); |
| if (result == PACKET_ERROR) |
| return -1; |
| else if (result == PACKET_OK) |
| { |
| for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++) |
| target_crc = target_crc * 16 + fromhex (*tmp); |
| |
| return (host_crc == target_crc); |
| } |
| } |
| |
| return simple_verify_memory (ops, data, lma, size); |
| } |
| |
| /* compare-sections command |
| |
| With no arguments, compares each loadable section in the exec bfd |
| with the same memory range on the target, and reports mismatches. |
| Useful for verifying the image on the target against the exec file. */ |
| |
| static void |
| compare_sections_command (char *args, int from_tty) |
| { |
| asection *s; |
| struct cleanup *old_chain; |
| gdb_byte *sectdata; |
| const char *sectname; |
| bfd_size_type size; |
| bfd_vma lma; |
| int matched = 0; |
| int mismatched = 0; |
| int res; |
| int read_only = 0; |
| |
| if (!exec_bfd) |
| error (_("command cannot be used without an exec file")); |
| |
| /* Make sure the remote is pointing at the right process. */ |
| set_general_process (); |
| |
| if (args != NULL && strcmp (args, "-r") == 0) |
| { |
| read_only = 1; |
| args = NULL; |
| } |
| |
| for (s = exec_bfd->sections; s; s = s->next) |
| { |
| if (!(s->flags & SEC_LOAD)) |
| continue; /* Skip non-loadable section. */ |
| |
| if (read_only && (s->flags & SEC_READONLY) == 0) |
| continue; /* Skip writeable sections */ |
| |
| size = bfd_get_section_size (s); |
| if (size == 0) |
| continue; /* Skip zero-length section. */ |
| |
| sectname = bfd_get_section_name (exec_bfd, s); |
| if (args && strcmp (args, sectname) != 0) |
| continue; /* Not the section selected by user. */ |
| |
| matched = 1; /* Do this section. */ |
| lma = s->lma; |
| |
| sectdata = (gdb_byte *) xmalloc (size); |
| old_chain = make_cleanup (xfree, sectdata); |
| bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); |
| |
| res = target_verify_memory (sectdata, lma, size); |
| |
| if (res == -1) |
| error (_("target memory fault, section %s, range %s -- %s"), sectname, |
| paddress (target_gdbarch (), lma), |
| paddress (target_gdbarch (), lma + size)); |
| |
| printf_filtered ("Section %s, range %s -- %s: ", sectname, |
| paddress (target_gdbarch (), lma), |
| paddress (target_gdbarch (), lma + size)); |
| if (res) |
| printf_filtered ("matched.\n"); |
| else |
| { |
| printf_filtered ("MIS-MATCHED!\n"); |
| mismatched++; |
| } |
| |
| do_cleanups (old_chain); |
| } |
| if (mismatched > 0) |
| warning (_("One or more sections of the target image does not match\n\ |
| the loaded file\n")); |
| if (args && !matched) |
| printf_filtered (_("No loaded section named '%s'.\n"), args); |
| } |
| |
| /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET |
| into remote target. The number of bytes written to the remote |
| target is returned, or -1 for error. */ |
| |
| static enum target_xfer_status |
| remote_write_qxfer (struct target_ops *ops, const char *object_name, |
| const char *annex, const gdb_byte *writebuf, |
| ULONGEST offset, LONGEST len, ULONGEST *xfered_len, |
| struct packet_config *packet) |
| { |
| int i, buf_len; |
| ULONGEST n; |
| struct remote_state *rs = get_remote_state (); |
| int max_size = get_memory_write_packet_size (); |
| |
| if (packet->support == PACKET_DISABLE) |
| return TARGET_XFER_E_IO; |
| |
| /* Insert header. */ |
| i = snprintf (rs->buf, max_size, |
| "qXfer:%s:write:%s:%s:", |
| object_name, annex ? annex : "", |
| phex_nz (offset, sizeof offset)); |
| max_size -= (i + 1); |
| |
| /* Escape as much data as fits into rs->buf. */ |
| buf_len = remote_escape_output |
| (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size); |
| |
| if (putpkt_binary (rs->buf, i + buf_len) < 0 |
| || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| || packet_ok (rs->buf, packet) != PACKET_OK) |
| return TARGET_XFER_E_IO; |
| |
| unpack_varlen_hex (rs->buf, &n); |
| |
| *xfered_len = n; |
| return TARGET_XFER_OK; |
| } |
| |
| /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet. |
| Data at OFFSET, of up to LEN bytes, is read into READBUF; the |
| number of bytes read is returned, or 0 for EOF, or -1 for error. |
| The number of bytes read may be less than LEN without indicating an |
| EOF. PACKET is checked and updated to indicate whether the remote |
| target supports this object. */ |
| |
| static enum target_xfer_status |
| remote_read_qxfer (struct target_ops *ops, const char *object_name, |
| const char *annex, |
| gdb_byte *readbuf, ULONGEST offset, LONGEST len, |
| ULONGEST *xfered_len, |
| struct packet_config *packet) |
| { |
| struct remote_state *rs = get_remote_state (); |
| LONGEST i, n, packet_len; |
| |
| if (packet->support == PACKET_DISABLE) |
| return TARGET_XFER_E_IO; |
| |
| /* Check whether we've cached an end-of-object packet that matches |
| this request. */ |
| if (rs->finished_object) |
| { |
| if (strcmp (object_name, rs->finished_object) == 0 |
| && strcmp (annex ? annex : "", rs->finished_annex) == 0 |
| && offset == rs->finished_offset) |
| return TARGET_XFER_EOF; |
| |
| |
| /* Otherwise, we're now reading something different. Discard |
| the cache. */ |
| xfree (rs->finished_object); |
| xfree (rs->finished_annex); |
| rs->finished_object = NULL; |
| rs->finished_annex = NULL; |
| } |
| |
| /* Request only enough to fit in a single packet. The actual data |
| may not, since we don't know how much of it will need to be escaped; |
| the target is free to respond with slightly less data. We subtract |
| five to account for the response type and the protocol frame. */ |
| n = min (get_remote_packet_size () - 5, len); |
| snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s", |
| object_name, annex ? annex : "", |
| phex_nz (offset, sizeof offset), |
| phex_nz (n, sizeof n)); |
| i = putpkt (rs->buf); |
| if (i < 0) |
| return TARGET_XFER_E_IO; |
| |
| rs->buf[0] = '\0'; |
| packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK) |
| return TARGET_XFER_E_IO; |
| |
| if (rs->buf[0] != 'l' && rs->buf[0] != 'm') |
| error (_("Unknown remote qXfer reply: %s"), rs->buf); |
| |
| /* 'm' means there is (or at least might be) more data after this |
| batch. That does not make sense unless there's at least one byte |
| of data in this reply. */ |
| if (rs->buf[0] == 'm' && packet_len == 1) |
| error (_("Remote qXfer reply contained no data.")); |
| |
| /* Got some data. */ |
| i = remote_unescape_input ((gdb_byte *) rs->buf + 1, |
| packet_len - 1, readbuf, n); |
| |
| /* 'l' is an EOF marker, possibly including a final block of data, |
| or possibly empty. If we have the final block of a non-empty |
| object, record this fact to bypass a subsequent partial read. */ |
| if (rs->buf[0] == 'l' && offset + i > 0) |
| { |
| rs->finished_object = xstrdup (object_name); |
| rs->finished_annex = xstrdup (annex ? annex : ""); |
| rs->finished_offset = offset + i; |
| } |
| |
| if (i == 0) |
| return TARGET_XFER_EOF; |
| else |
| { |
| *xfered_len = i; |
| return TARGET_XFER_OK; |
| } |
| } |
| |
| static enum target_xfer_status |
| remote_xfer_partial (struct target_ops *ops, enum target_object object, |
| const char *annex, gdb_byte *readbuf, |
| const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
| ULONGEST *xfered_len) |
| { |
| struct remote_state *rs; |
| int i; |
| char *p2; |
| char query_type; |
| int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
| |
| set_remote_traceframe (); |
| set_general_thread (inferior_ptid); |
| |
| rs = get_remote_state (); |
| |
| /* Handle memory using the standard memory routines. */ |
| if (object == TARGET_OBJECT_MEMORY) |
| { |
| /* If the remote target is connected but not running, we should |
| pass this request down to a lower stratum (e.g. the executable |
| file). */ |
| if (!target_has_execution) |
| return TARGET_XFER_EOF; |
| |
| if (writebuf != NULL) |
| return remote_write_bytes (offset, writebuf, len, unit_size, |
| xfered_len); |
| else |
| return remote_read_bytes (ops, offset, readbuf, len, unit_size, |
| xfered_len); |
| } |
| |
| /* Handle SPU memory using qxfer packets. */ |
| if (object == TARGET_OBJECT_SPU) |
| { |
| if (readbuf) |
| return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len, |
| xfered_len, &remote_protocol_packets |
| [PACKET_qXfer_spu_read]); |
| else |
| return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len, |
| xfered_len, &remote_protocol_packets |
| [PACKET_qXfer_spu_write]); |
| } |
| |
| /* Handle extra signal info using qxfer packets. */ |
| if (object == TARGET_OBJECT_SIGNAL_INFO) |
| { |
| if (readbuf) |
| return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len, |
| xfered_len, &remote_protocol_packets |
| [PACKET_qXfer_siginfo_read]); |
| else |
| return remote_write_qxfer (ops, "siginfo", annex, |
| writebuf, offset, len, xfered_len, |
| &remote_protocol_packets |
| [PACKET_qXfer_siginfo_write]); |
| } |
| |
| if (object == TARGET_OBJECT_STATIC_TRACE_DATA) |
| { |
| if (readbuf) |
| return remote_read_qxfer (ops, "statictrace", annex, |
| readbuf, offset, len, xfered_len, |
| &remote_protocol_packets |
| [PACKET_qXfer_statictrace_read]); |
| else |
| return TARGET_XFER_E_IO; |
| } |
| |
| /* Only handle flash writes. */ |
| if (writebuf != NULL) |
| { |
| switch (object) |
| { |
| case TARGET_OBJECT_FLASH: |
| return remote_flash_write (ops, offset, len, xfered_len, |
| writebuf); |
| |
| default: |
| return TARGET_XFER_E_IO; |
| } |
| } |
| |
| /* Map pre-existing objects onto letters. DO NOT do this for new |
| objects!!! Instead specify new query packets. */ |
| switch (object) |
| { |
| case TARGET_OBJECT_AVR: |
| query_type = 'R'; |
| break; |
| |
| case TARGET_OBJECT_AUXV: |
| gdb_assert (annex == NULL); |
| return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_auxv]); |
| |
| case TARGET_OBJECT_AVAILABLE_FEATURES: |
| return remote_read_qxfer |
| (ops, "features", annex, readbuf, offset, len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_features]); |
| |
| case TARGET_OBJECT_LIBRARIES: |
| return remote_read_qxfer |
| (ops, "libraries", annex, readbuf, offset, len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_libraries]); |
| |
| case TARGET_OBJECT_LIBRARIES_SVR4: |
| return remote_read_qxfer |
| (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_libraries_svr4]); |
| |
| case TARGET_OBJECT_MEMORY_MAP: |
| gdb_assert (annex == NULL); |
| return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_memory_map]); |
| |
| case TARGET_OBJECT_OSDATA: |
| /* Should only get here if we're connected. */ |
| gdb_assert (rs->remote_desc); |
| return remote_read_qxfer |
| (ops, "osdata", annex, readbuf, offset, len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_osdata]); |
| |
| case TARGET_OBJECT_THREADS: |
| gdb_assert (annex == NULL); |
| return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_threads]); |
| |
| case TARGET_OBJECT_TRACEFRAME_INFO: |
| gdb_assert (annex == NULL); |
| return remote_read_qxfer |
| (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_traceframe_info]); |
| |
| case TARGET_OBJECT_FDPIC: |
| return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_fdpic]); |
| |
| case TARGET_OBJECT_OPENVMS_UIB: |
| return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_uib]); |
| |
| case TARGET_OBJECT_BTRACE: |
| return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len, |
| xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_btrace]); |
| |
| case TARGET_OBJECT_BTRACE_CONF: |
| return remote_read_qxfer (ops, "btrace-conf", annex, readbuf, offset, |
| len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_btrace_conf]); |
| |
| case TARGET_OBJECT_EXEC_FILE: |
| return remote_read_qxfer (ops, "exec-file", annex, readbuf, offset, |
| len, xfered_len, |
| &remote_protocol_packets[PACKET_qXfer_exec_file]); |
| |
| default: |
| return TARGET_XFER_E_IO; |
| } |
| |
| /* Minimum outbuf size is get_remote_packet_size (). If LEN is not |
| large enough let the caller deal with it. */ |
| if (len < get_remote_packet_size ()) |
| return TARGET_XFER_E_IO; |
| len = get_remote_packet_size (); |
| |
| /* Except for querying the minimum buffer size, target must be open. */ |
| if (!rs->remote_desc) |
| error (_("remote query is only available after target open")); |
| |
| gdb_assert (annex != NULL); |
| gdb_assert (readbuf != NULL); |
| |
| p2 = rs->buf; |
| *p2++ = 'q'; |
| *p2++ = query_type; |
| |
| /* We used one buffer char for the remote protocol q command and |
| another for the query type. As the remote protocol encapsulation |
| uses 4 chars plus one extra in case we are debugging |
| (remote_debug), we have PBUFZIZ - 7 left to pack the query |
| string. */ |
| i = 0; |
| while (annex[i] && (i < (get_remote_packet_size () - 8))) |
| { |
| /* Bad caller may have sent forbidden characters. */ |
| gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'); |
| *p2++ = annex[i]; |
| i++; |
| } |
| *p2 = '\0'; |
| gdb_assert (annex[i] == '\0'); |
| |
| i = putpkt (rs->buf); |
| if (i < 0) |
| return TARGET_XFER_E_IO; |
| |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| strcpy ((char *) readbuf, rs->buf); |
| |
| *xfered_len = strlen ((char *) readbuf); |
| return TARGET_XFER_OK; |
| } |
| |
| static int |
| remote_search_memory (struct target_ops* ops, |
| CORE_ADDR start_addr, ULONGEST search_space_len, |
| const gdb_byte *pattern, ULONGEST pattern_len, |
| CORE_ADDR *found_addrp) |
| { |
| int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| struct remote_state *rs = get_remote_state (); |
| int max_size = get_memory_write_packet_size (); |
| struct packet_config *packet = |
| &remote_protocol_packets[PACKET_qSearch_memory]; |
| /* Number of packet bytes used to encode the pattern; |
| this could be more than PATTERN_LEN due to escape characters. */ |
| int escaped_pattern_len; |
| /* Amount of pattern that was encodable in the packet. */ |
| int used_pattern_len; |
| int i; |
| int found; |
| ULONGEST found_addr; |
| |
| /* Don't go to the target if we don't have to. |
| This is done before checking packet->support to avoid the possibility that |
| a success for this edge case means the facility works in general. */ |
| if (pattern_len > search_space_len) |
| return 0; |
| if (pattern_len == 0) |
| { |
| *found_addrp = start_addr; |
| return 1; |
| } |
| |
| /* If we already know the packet isn't supported, fall back to the simple |
| way of searching memory. */ |
| |
| if (packet_config_support (packet) == PACKET_DISABLE) |
| { |
| /* Target doesn't provided special support, fall back and use the |
| standard support (copy memory and do the search here). */ |
| return simple_search_memory (ops, start_addr, search_space_len, |
| pattern, pattern_len, found_addrp); |
| } |
| |
| /* Make sure the remote is pointing at the right process. */ |
| set_general_process (); |
| |
| /* Insert header. */ |
| i = snprintf (rs->buf, max_size, |
| "qSearch:memory:%s;%s;", |
| phex_nz (start_addr, addr_size), |
| phex_nz (search_space_len, sizeof (search_space_len))); |
| max_size -= (i + 1); |
| |
| /* Escape as much data as fits into rs->buf. */ |
| escaped_pattern_len = |
| remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i, |
| &used_pattern_len, max_size); |
| |
| /* Bail if the pattern is too large. */ |
| if (used_pattern_len != pattern_len) |
| error (_("Pattern is too large to transmit to remote target.")); |
| |
| if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0 |
| || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 |
| || packet_ok (rs->buf, packet) != PACKET_OK) |
| { |
| /* The request may not have worked because the command is not |
| supported. If so, fall back to the simple way. */ |
| if (packet->support == PACKET_DISABLE) |
| { |
| return simple_search_memory (ops, start_addr, search_space_len, |
| pattern, pattern_len, found_addrp); |
| } |
| return -1; |
| } |
| |
| if (rs->buf[0] == '0') |
| found = 0; |
| else if (rs->buf[0] == '1') |
| { |
| found = 1; |
| if (rs->buf[1] != ',') |
| error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| unpack_varlen_hex (rs->buf + 2, &found_addr); |
| *found_addrp = found_addr; |
| } |
| else |
| error (_("Unknown qSearch:memory reply: %s"), rs->buf); |
| |
| return found; |
| } |
| |
| static void |
| remote_rcmd (struct target_ops *self, const char *command, |
| struct ui_file *outbuf) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| |
| if (!rs->remote_desc) |
| error (_("remote rcmd is only available after target open")); |
| |
| /* Send a NULL command across as an empty command. */ |
| if (command == NULL) |
| command = ""; |
| |
| /* The query prefix. */ |
| strcpy (rs->buf, "qRcmd,"); |
| p = strchr (rs->buf, '\0'); |
| |
| if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) |
| > get_remote_packet_size ()) |
| error (_("\"monitor\" command ``%s'' is too long."), command); |
| |
| /* Encode the actual command. */ |
| bin2hex ((const gdb_byte *) command, p, strlen (command)); |
| |
| if (putpkt (rs->buf) < 0) |
| error (_("Communication problem with target.")); |
| |
| /* get/display the response */ |
| while (1) |
| { |
| char *buf; |
| |
| /* XXX - see also remote_get_noisy_reply(). */ |
| QUIT; /* Allow user to bail out with ^C. */ |
| rs->buf[0] = '\0'; |
| if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1) |
| { |
| /* Timeout. Continue to (try to) read responses. |
| This is better than stopping with an error, assuming the stub |
| is still executing the (long) monitor command. |
| If needed, the user can interrupt gdb using C-c, obtaining |
| an effect similar to stop on timeout. */ |
| continue; |
| } |
| buf = rs->buf; |
| if (buf[0] == '\0') |
| error (_("Target does not support this command.")); |
| if (buf[0] == 'O' && buf[1] != 'K') |
| { |
| remote_console_output (buf + 1); /* 'O' message from stub. */ |
| continue; |
| } |
| if (strcmp (buf, "OK") == 0) |
| break; |
| if (strlen (buf) == 3 && buf[0] == 'E' |
| && isdigit (buf[1]) && isdigit (buf[2])) |
| { |
| error (_("Protocol error with Rcmd")); |
| } |
| for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) |
| { |
| char c = (fromhex (p[0]) << 4) + fromhex (p[1]); |
| |
| fputc_unfiltered (c, outbuf); |
| } |
| break; |
| } |
| } |
| |
| static VEC(mem_region_s) * |
| remote_memory_map (struct target_ops *ops) |
| { |
| VEC(mem_region_s) *result = NULL; |
| char *text = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_MEMORY_MAP, NULL); |
| |
| if (text) |
| { |
| struct cleanup *back_to = make_cleanup (xfree, text); |
| |
| result = parse_memory_map (text); |
| do_cleanups (back_to); |
| } |
| |
| return result; |
| } |
| |
| static void |
| packet_command (char *args, int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!rs->remote_desc) |
| error (_("command can only be used with remote target")); |
| |
| if (!args) |
| error (_("remote-packet command requires packet text as argument")); |
| |
| puts_filtered ("sending: "); |
| print_packet (args); |
| puts_filtered ("\n"); |
| putpkt (args); |
| |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| puts_filtered ("received: "); |
| print_packet (rs->buf); |
| puts_filtered ("\n"); |
| } |
| |
| #if 0 |
| /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */ |
| |
| static void display_thread_info (struct gdb_ext_thread_info *info); |
| |
| static void threadset_test_cmd (char *cmd, int tty); |
| |
| static void threadalive_test (char *cmd, int tty); |
| |
| static void threadlist_test_cmd (char *cmd, int tty); |
| |
| int get_and_display_threadinfo (threadref *ref); |
| |
| static void threadinfo_test_cmd (char *cmd, int tty); |
| |
| static int thread_display_step (threadref *ref, void *context); |
| |
| static void threadlist_update_test_cmd (char *cmd, int tty); |
| |
| static void init_remote_threadtests (void); |
| |
| #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */ |
| |
| static void |
| threadset_test_cmd (char *cmd, int tty) |
| { |
| int sample_thread = SAMPLE_THREAD; |
| |
| printf_filtered (_("Remote threadset test\n")); |
| set_general_thread (sample_thread); |
| } |
| |
| |
| static void |
| threadalive_test (char *cmd, int tty) |
| { |
| int sample_thread = SAMPLE_THREAD; |
| int pid = ptid_get_pid (inferior_ptid); |
| ptid_t ptid = ptid_build (pid, sample_thread, 0); |
| |
| if (remote_thread_alive (ptid)) |
| printf_filtered ("PASS: Thread alive test\n"); |
| else |
| printf_filtered ("FAIL: Thread alive test\n"); |
| } |
| |
| void output_threadid (char *title, threadref *ref); |
| |
| void |
| output_threadid (char *title, threadref *ref) |
| { |
| char hexid[20]; |
| |
| pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */ |
| hexid[16] = 0; |
| printf_filtered ("%s %s\n", title, (&hexid[0])); |
| } |
| |
| static void |
| threadlist_test_cmd (char *cmd, int tty) |
| { |
| int startflag = 1; |
| threadref nextthread; |
| int done, result_count; |
| threadref threadlist[3]; |
| |
| printf_filtered ("Remote Threadlist test\n"); |
| if (!remote_get_threadlist (startflag, &nextthread, 3, &done, |
| &result_count, &threadlist[0])) |
| printf_filtered ("FAIL: threadlist test\n"); |
| else |
| { |
| threadref *scan = threadlist; |
| threadref *limit = scan + result_count; |
| |
| while (scan < limit) |
| output_threadid (" thread ", scan++); |
| } |
| } |
| |
| void |
| display_thread_info (struct gdb_ext_thread_info *info) |
| { |
| output_threadid ("Threadid: ", &info->threadid); |
| printf_filtered ("Name: %s\n ", info->shortname); |
| printf_filtered ("State: %s\n", info->display); |
| printf_filtered ("other: %s\n\n", info->more_display); |
| } |
| |
| int |
| get_and_display_threadinfo (threadref *ref) |
| { |
| int result; |
| int set; |
| struct gdb_ext_thread_info threadinfo; |
| |
| set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| | TAG_MOREDISPLAY | TAG_DISPLAY; |
| if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) |
| display_thread_info (&threadinfo); |
| return result; |
| } |
| |
| static void |
| threadinfo_test_cmd (char *cmd, int tty) |
| { |
| int athread = SAMPLE_THREAD; |
| threadref thread; |
| int set; |
| |
| int_to_threadref (&thread, athread); |
| printf_filtered ("Remote Threadinfo test\n"); |
| if (!get_and_display_threadinfo (&thread)) |
| printf_filtered ("FAIL cannot get thread info\n"); |
| } |
| |
| static int |
| thread_display_step (threadref *ref, void *context) |
| { |
| /* output_threadid(" threadstep ",ref); *//* simple test */ |
| return get_and_display_threadinfo (ref); |
| } |
| |
| static void |
| threadlist_update_test_cmd (char *cmd, int tty) |
| { |
| printf_filtered ("Remote Threadlist update test\n"); |
| remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); |
| } |
| |
| static void |
| init_remote_threadtests (void) |
| { |
| add_com ("tlist", class_obscure, threadlist_test_cmd, |
| _("Fetch and print the remote list of " |
| "thread identifiers, one pkt only")); |
| add_com ("tinfo", class_obscure, threadinfo_test_cmd, |
| _("Fetch and display info about one thread")); |
| add_com ("tset", class_obscure, threadset_test_cmd, |
| _("Test setting to a different thread")); |
| add_com ("tupd", class_obscure, threadlist_update_test_cmd, |
| _("Iterate through updating all remote thread info")); |
| add_com ("talive", class_obscure, threadalive_test, |
| _(" Remote thread alive test ")); |
| } |
| |
| #endif /* 0 */ |
| |
| /* Convert a thread ID to a string. Returns the string in a static |
| buffer. */ |
| |
| static char * |
| remote_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| { |
| static char buf[64]; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (ptid_equal (ptid, null_ptid)) |
| return normal_pid_to_str (ptid); |
| else if (ptid_is_pid (ptid)) |
| { |
| /* Printing an inferior target id. */ |
| |
| /* When multi-process extensions are off, there's no way in the |
| remote protocol to know the remote process id, if there's any |
| at all. There's one exception --- when we're connected with |
| target extended-remote, and we manually attached to a process |
| with "attach PID". We don't record anywhere a flag that |
| allows us to distinguish that case from the case of |
| connecting with extended-remote and the stub already being |
| attached to a process, and reporting yes to qAttached, hence |
| no smart special casing here. */ |
| if (!remote_multi_process_p (rs)) |
| { |
| xsnprintf (buf, sizeof buf, "Remote target"); |
| return buf; |
| } |
| |
| return normal_pid_to_str (ptid); |
| } |
| else |
| { |
| if (ptid_equal (magic_null_ptid, ptid)) |
| xsnprintf (buf, sizeof buf, "Thread <main>"); |
| else if (remote_multi_process_p (rs)) |
| if (ptid_get_lwp (ptid) == 0) |
| return normal_pid_to_str (ptid); |
| else |
| xsnprintf (buf, sizeof buf, "Thread %d.%ld", |
| ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
| else |
| xsnprintf (buf, sizeof buf, "Thread %ld", |
| ptid_get_lwp (ptid)); |
| return buf; |
| } |
| } |
| |
| /* Get the address of the thread local variable in OBJFILE which is |
| stored at OFFSET within the thread local storage for thread PTID. */ |
| |
| static CORE_ADDR |
| remote_get_thread_local_address (struct target_ops *ops, |
| ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset) |
| { |
| if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *endp = rs->buf + get_remote_packet_size (); |
| enum packet_result result; |
| |
| strcpy (p, "qGetTLSAddr:"); |
| p += strlen (p); |
| p = write_ptid (p, endp, ptid); |
| *p++ = ','; |
| p += hexnumstr (p, offset); |
| *p++ = ','; |
| p += hexnumstr (p, lm); |
| *p++ = '\0'; |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| result = packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_qGetTLSAddr]); |
| if (result == PACKET_OK) |
| { |
| ULONGEST result; |
| |
| unpack_varlen_hex (rs->buf, &result); |
| return result; |
| } |
| else if (result == PACKET_UNKNOWN) |
| throw_error (TLS_GENERIC_ERROR, |
| _("Remote target doesn't support qGetTLSAddr packet")); |
| else |
| throw_error (TLS_GENERIC_ERROR, |
| _("Remote target failed to process qGetTLSAddr request")); |
| } |
| else |
| throw_error (TLS_GENERIC_ERROR, |
| _("TLS not supported or disabled on this target")); |
| /* Not reached. */ |
| return 0; |
| } |
| |
| /* Provide thread local base, i.e. Thread Information Block address. |
| Returns 1 if ptid is found and thread_local_base is non zero. */ |
| |
| static int |
| remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr) |
| { |
| if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *endp = rs->buf + get_remote_packet_size (); |
| enum packet_result result; |
| |
| strcpy (p, "qGetTIBAddr:"); |
| p += strlen (p); |
| p = write_ptid (p, endp, ptid); |
| *p++ = '\0'; |
| |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| result = packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_qGetTIBAddr]); |
| if (result == PACKET_OK) |
| { |
| ULONGEST result; |
| |
| unpack_varlen_hex (rs->buf, &result); |
| if (addr) |
| *addr = (CORE_ADDR) result; |
| return 1; |
| } |
| else if (result == PACKET_UNKNOWN) |
| error (_("Remote target doesn't support qGetTIBAddr packet")); |
| else |
| error (_("Remote target failed to process qGetTIBAddr request")); |
| } |
| else |
| error (_("qGetTIBAddr not supported or disabled on this target")); |
| /* Not reached. */ |
| return 0; |
| } |
| |
| /* Support for inferring a target description based on the current |
| architecture and the size of a 'g' packet. While the 'g' packet |
| can have any size (since optional registers can be left off the |
| end), some sizes are easily recognizable given knowledge of the |
| approximate architecture. */ |
| |
| struct remote_g_packet_guess |
| { |
| int bytes; |
| const struct target_desc *tdesc; |
| }; |
| typedef struct remote_g_packet_guess remote_g_packet_guess_s; |
| DEF_VEC_O(remote_g_packet_guess_s); |
| |
| struct remote_g_packet_data |
| { |
| VEC(remote_g_packet_guess_s) *guesses; |
| }; |
| |
| static struct gdbarch_data *remote_g_packet_data_handle; |
| |
| static void * |
| remote_g_packet_data_init (struct obstack *obstack) |
| { |
| return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data); |
| } |
| |
| void |
| register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, |
| const struct target_desc *tdesc) |
| { |
| struct remote_g_packet_data *data |
| = ((struct remote_g_packet_data *) |
| gdbarch_data (gdbarch, remote_g_packet_data_handle)); |
| struct remote_g_packet_guess new_guess, *guess; |
| int ix; |
| |
| gdb_assert (tdesc != NULL); |
| |
| for (ix = 0; |
| VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| ix++) |
| if (guess->bytes == bytes) |
| internal_error (__FILE__, __LINE__, |
| _("Duplicate g packet description added for size %d"), |
| bytes); |
| |
| new_guess.bytes = bytes; |
| new_guess.tdesc = tdesc; |
| VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess); |
| } |
| |
| /* Return 1 if remote_read_description would do anything on this target |
| and architecture, 0 otherwise. */ |
| |
| static int |
| remote_read_description_p (struct target_ops *target) |
| { |
| struct remote_g_packet_data *data |
| = ((struct remote_g_packet_data *) |
| gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); |
| |
| if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static const struct target_desc * |
| remote_read_description (struct target_ops *target) |
| { |
| struct remote_g_packet_data *data |
| = ((struct remote_g_packet_data *) |
| gdbarch_data (target_gdbarch (), remote_g_packet_data_handle)); |
| |
| /* Do not try this during initial connection, when we do not know |
| whether there is a running but stopped thread. */ |
| if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid)) |
| return target->beneath->to_read_description (target->beneath); |
| |
| if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) |
| { |
| struct remote_g_packet_guess *guess; |
| int ix; |
| int bytes = send_g_packet (); |
| |
| for (ix = 0; |
| VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); |
| ix++) |
| if (guess->bytes == bytes) |
| return guess->tdesc; |
| |
| /* We discard the g packet. A minor optimization would be to |
| hold on to it, and fill the register cache once we have selected |
| an architecture, but it's too tricky to do safely. */ |
| } |
| |
| return target->beneath->to_read_description (target->beneath); |
| } |
| |
| /* Remote file transfer support. This is host-initiated I/O, not |
| target-initiated; for target-initiated, see remote-fileio.c. */ |
| |
| /* If *LEFT is at least the length of STRING, copy STRING to |
| *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| decrease *LEFT. Otherwise raise an error. */ |
| |
| static void |
| remote_buffer_add_string (char **buffer, int *left, char *string) |
| { |
| int len = strlen (string); |
| |
| if (len > *left) |
| error (_("Packet too long for target.")); |
| |
| memcpy (*buffer, string, len); |
| *buffer += len; |
| *left -= len; |
| |
| /* NUL-terminate the buffer as a convenience, if there is |
| room. */ |
| if (*left) |
| **buffer = '\0'; |
| } |
| |
| /* If *LEFT is large enough, hex encode LEN bytes from BYTES into |
| *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| decrease *LEFT. Otherwise raise an error. */ |
| |
| static void |
| remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes, |
| int len) |
| { |
| if (2 * len > *left) |
| error (_("Packet too long for target.")); |
| |
| bin2hex (bytes, *buffer, len); |
| *buffer += 2 * len; |
| *left -= 2 * len; |
| |
| /* NUL-terminate the buffer as a convenience, if there is |
| room. */ |
| if (*left) |
| **buffer = '\0'; |
| } |
| |
| /* If *LEFT is large enough, convert VALUE to hex and add it to |
| *BUFFER, update *BUFFER to point to the new end of the buffer, and |
| decrease *LEFT. Otherwise raise an error. */ |
| |
| static void |
| remote_buffer_add_int (char **buffer, int *left, ULONGEST value) |
| { |
| int len = hexnumlen (value); |
| |
| if (len > *left) |
| error (_("Packet too long for target.")); |
| |
| hexnumstr (*buffer, value); |
| *buffer += len; |
| *left -= len; |
| |
| /* NUL-terminate the buffer as a convenience, if there is |
| room. */ |
| if (*left) |
| **buffer = '\0'; |
| } |
| |
| /* Parse an I/O result packet from BUFFER. Set RETCODE to the return |
| value, *REMOTE_ERRNO to the remote error number or zero if none |
| was included, and *ATTACHMENT to point to the start of the annex |
| if any. The length of the packet isn't needed here; there may |
| be NUL bytes in BUFFER, but they will be after *ATTACHMENT. |
| |
| Return 0 if the packet could be parsed, -1 if it could not. If |
| -1 is returned, the other variables may not be initialized. */ |
| |
| static int |
| remote_hostio_parse_result (char *buffer, int *retcode, |
| int *remote_errno, char **attachment) |
| { |
| char *p, *p2; |
| |
| *remote_errno = 0; |
| *attachment = NULL; |
| |
| if (buffer[0] != 'F') |
| return -1; |
| |
| errno = 0; |
| *retcode = strtol (&buffer[1], &p, 16); |
| if (errno != 0 || p == &buffer[1]) |
| return -1; |
| |
| /* Check for ",errno". */ |
| if (*p == ',') |
| { |
| errno = 0; |
| *remote_errno = strtol (p + 1, &p2, 16); |
| if (errno != 0 || p + 1 == p2) |
| return -1; |
| p = p2; |
| } |
| |
| /* Check for ";attachment". If there is no attachment, the |
| packet should end here. */ |
| if (*p == ';') |
| { |
| *attachment = p + 1; |
| return 0; |
| } |
| else if (*p == '\0') |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Send a prepared I/O packet to the target and read its response. |
| The prepared packet is in the global RS->BUF before this function |
| is called, and the answer is there when we return. |
| |
| COMMAND_BYTES is the length of the request to send, which may include |
| binary data. WHICH_PACKET is the packet configuration to check |
| before attempting a packet. If an error occurs, *REMOTE_ERRNO |
| is set to the error number and -1 is returned. Otherwise the value |
| returned by the function is returned. |
| |
| ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an |
| attachment is expected; an error will be reported if there's a |
| mismatch. If one is found, *ATTACHMENT will be set to point into |
| the packet buffer and *ATTACHMENT_LEN will be set to the |
| attachment's length. */ |
| |
| static int |
| remote_hostio_send_command (int command_bytes, int which_packet, |
| int *remote_errno, char **attachment, |
| int *attachment_len) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int ret, bytes_read; |
| char *attachment_tmp; |
| |
| if (!rs->remote_desc |
| || packet_support (which_packet) == PACKET_DISABLE) |
| { |
| *remote_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| putpkt_binary (rs->buf, command_bytes); |
| bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0); |
| |
| /* If it timed out, something is wrong. Don't try to parse the |
| buffer. */ |
| if (bytes_read < 0) |
| { |
| *remote_errno = FILEIO_EINVAL; |
| return -1; |
| } |
| |
| switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet])) |
| { |
| case PACKET_ERROR: |
| *remote_errno = FILEIO_EINVAL; |
| return -1; |
| case PACKET_UNKNOWN: |
| *remote_errno = FILEIO_ENOSYS; |
| return -1; |
| case PACKET_OK: |
| break; |
| } |
| |
| if (remote_hostio_parse_result (rs->buf, &ret, remote_errno, |
| &attachment_tmp)) |
| { |
| *remote_errno = FILEIO_EINVAL; |
| return -1; |
| } |
| |
| /* Make sure we saw an attachment if and only if we expected one. */ |
| if ((attachment_tmp == NULL && attachment != NULL) |
| || (attachment_tmp != NULL && attachment == NULL)) |
| { |
| *remote_errno = FILEIO_EINVAL; |
| return -1; |
| } |
| |
| /* If an attachment was found, it must point into the packet buffer; |
| work out how many bytes there were. */ |
| if (attachment_tmp != NULL) |
| { |
| *attachment = attachment_tmp; |
| *attachment_len = bytes_read - (*attachment - rs->buf); |
| } |
| |
| return ret; |
| } |
| |
| /* Invalidate the readahead cache. */ |
| |
| static void |
| readahead_cache_invalidate (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| rs->readahead_cache.fd = -1; |
| } |
| |
| /* Invalidate the readahead cache if it is holding data for FD. */ |
| |
| static void |
| readahead_cache_invalidate_fd (int fd) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->readahead_cache.fd == fd) |
| rs->readahead_cache.fd = -1; |
| } |
| |
| /* Set the filesystem remote_hostio functions that take FILENAME |
| arguments will use. Return 0 on success, or -1 if an error |
| occurs (and set *REMOTE_ERRNO). */ |
| |
| static int |
| remote_hostio_set_filesystem (struct inferior *inf, int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid; |
| char *p = rs->buf; |
| int left = get_remote_packet_size () - 1; |
| char arg[9]; |
| int ret; |
| |
| if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) |
| return 0; |
| |
| if (rs->fs_pid != -1 && required_pid == rs->fs_pid) |
| return 0; |
| |
| remote_buffer_add_string (&p, &left, "vFile:setfs:"); |
| |
| xsnprintf (arg, sizeof (arg), "%x", required_pid); |
| remote_buffer_add_string (&p, &left, arg); |
| |
| ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs, |
| remote_errno, NULL, NULL); |
| |
| if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE) |
| return 0; |
| |
| if (ret == 0) |
| rs->fs_pid = required_pid; |
| |
| return ret; |
| } |
| |
| /* Implementation of to_fileio_open. */ |
| |
| static int |
| remote_hostio_open (struct target_ops *self, |
| struct inferior *inf, const char *filename, |
| int flags, int mode, int warn_if_slow, |
| int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| int left = get_remote_packet_size () - 1; |
| |
| if (warn_if_slow) |
| { |
| static int warning_issued = 0; |
| |
| printf_unfiltered (_("Reading %s from remote target...\n"), |
| filename); |
| |
| if (!warning_issued) |
| { |
| warning (_("File transfers from remote targets can be slow." |
| " Use \"set sysroot\" to access files locally" |
| " instead.")); |
| warning_issued = 1; |
| } |
| } |
| |
| if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| return -1; |
| |
| remote_buffer_add_string (&p, &left, "vFile:open:"); |
| |
| remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| strlen (filename)); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| remote_buffer_add_int (&p, &left, flags); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| remote_buffer_add_int (&p, &left, mode); |
| |
| return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open, |
| remote_errno, NULL, NULL); |
| } |
| |
| /* Implementation of to_fileio_pwrite. */ |
| |
| static int |
| remote_hostio_pwrite (struct target_ops *self, |
| int fd, const gdb_byte *write_buf, int len, |
| ULONGEST offset, int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| int left = get_remote_packet_size (); |
| int out_len; |
| |
| readahead_cache_invalidate_fd (fd); |
| |
| remote_buffer_add_string (&p, &left, "vFile:pwrite:"); |
| |
| remote_buffer_add_int (&p, &left, fd); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| remote_buffer_add_int (&p, &left, offset); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len, |
| get_remote_packet_size () - (p - rs->buf)); |
| |
| return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite, |
| remote_errno, NULL, NULL); |
| } |
| |
| /* Helper for the implementation of to_fileio_pread. Read the file |
| from the remote side with vFile:pread. */ |
| |
| static int |
| remote_hostio_pread_vFile (struct target_ops *self, |
| int fd, gdb_byte *read_buf, int len, |
| ULONGEST offset, int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *attachment; |
| int left = get_remote_packet_size (); |
| int ret, attachment_len; |
| int read_len; |
| |
| remote_buffer_add_string (&p, &left, "vFile:pread:"); |
| |
| remote_buffer_add_int (&p, &left, fd); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| remote_buffer_add_int (&p, &left, len); |
| remote_buffer_add_string (&p, &left, ","); |
| |
| remote_buffer_add_int (&p, &left, offset); |
| |
| ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread, |
| remote_errno, &attachment, |
| &attachment_len); |
| |
| if (ret < 0) |
| return ret; |
| |
| read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| read_buf, len); |
| if (read_len != ret) |
| error (_("Read returned %d, but %d bytes."), ret, (int) read_len); |
| |
| return ret; |
| } |
| |
| /* Serve pread from the readahead cache. Returns number of bytes |
| read, or 0 if the request can't be served from the cache. */ |
| |
| static int |
| remote_hostio_pread_from_cache (struct remote_state *rs, |
| int fd, gdb_byte *read_buf, size_t len, |
| ULONGEST offset) |
| { |
| struct readahead_cache *cache = &rs->readahead_cache; |
| |
| if (cache->fd == fd |
| && cache->offset <= offset |
| && offset < cache->offset + cache->bufsize) |
| { |
| ULONGEST max = cache->offset + cache->bufsize; |
| |
| if (offset + len > max) |
| len = max - offset; |
| |
| memcpy (read_buf, cache->buf + offset - cache->offset, len); |
| return len; |
| } |
| |
| return 0; |
| } |
| |
| /* Implementation of to_fileio_pread. */ |
| |
| static int |
| remote_hostio_pread (struct target_ops *self, |
| int fd, gdb_byte *read_buf, int len, |
| ULONGEST offset, int *remote_errno) |
| { |
| int ret; |
| struct remote_state *rs = get_remote_state (); |
| struct readahead_cache *cache = &rs->readahead_cache; |
| |
| ret = remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); |
| if (ret > 0) |
| { |
| cache->hit_count++; |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n", |
| pulongest (cache->hit_count)); |
| return ret; |
| } |
| |
| cache->miss_count++; |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n", |
| pulongest (cache->miss_count)); |
| |
| cache->fd = fd; |
| cache->offset = offset; |
| cache->bufsize = get_remote_packet_size (); |
| cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize); |
| |
| ret = remote_hostio_pread_vFile (self, cache->fd, cache->buf, cache->bufsize, |
| cache->offset, remote_errno); |
| if (ret <= 0) |
| { |
| readahead_cache_invalidate_fd (fd); |
| return ret; |
| } |
| |
| cache->bufsize = ret; |
| return remote_hostio_pread_from_cache (rs, fd, read_buf, len, offset); |
| } |
| |
| /* Implementation of to_fileio_close. */ |
| |
| static int |
| remote_hostio_close (struct target_ops *self, int fd, int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| int left = get_remote_packet_size () - 1; |
| |
| readahead_cache_invalidate_fd (fd); |
| |
| remote_buffer_add_string (&p, &left, "vFile:close:"); |
| |
| remote_buffer_add_int (&p, &left, fd); |
| |
| return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close, |
| remote_errno, NULL, NULL); |
| } |
| |
| /* Implementation of to_fileio_unlink. */ |
| |
| static int |
| remote_hostio_unlink (struct target_ops *self, |
| struct inferior *inf, const char *filename, |
| int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| int left = get_remote_packet_size () - 1; |
| |
| if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| return -1; |
| |
| remote_buffer_add_string (&p, &left, "vFile:unlink:"); |
| |
| remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| strlen (filename)); |
| |
| return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink, |
| remote_errno, NULL, NULL); |
| } |
| |
| /* Implementation of to_fileio_readlink. */ |
| |
| static char * |
| remote_hostio_readlink (struct target_ops *self, |
| struct inferior *inf, const char *filename, |
| int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| char *attachment; |
| int left = get_remote_packet_size (); |
| int len, attachment_len; |
| int read_len; |
| char *ret; |
| |
| if (remote_hostio_set_filesystem (inf, remote_errno) != 0) |
| return NULL; |
| |
| remote_buffer_add_string (&p, &left, "vFile:readlink:"); |
| |
| remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, |
| strlen (filename)); |
| |
| len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink, |
| remote_errno, &attachment, |
| &attachment_len); |
| |
| if (len < 0) |
| return NULL; |
| |
| ret = (char *) xmalloc (len + 1); |
| |
| read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| (gdb_byte *) ret, len); |
| if (read_len != len) |
| error (_("Readlink returned %d, but %d bytes."), len, read_len); |
| |
| ret[len] = '\0'; |
| return ret; |
| } |
| |
| /* Implementation of to_fileio_fstat. */ |
| |
| static int |
| remote_hostio_fstat (struct target_ops *self, |
| int fd, struct stat *st, |
| int *remote_errno) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p = rs->buf; |
| int left = get_remote_packet_size (); |
| int attachment_len, ret; |
| char *attachment; |
| struct fio_stat fst; |
| int read_len; |
| |
| remote_buffer_add_string (&p, &left, "vFile:fstat:"); |
| |
| remote_buffer_add_int (&p, &left, fd); |
| |
| ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat, |
| remote_errno, &attachment, |
| &attachment_len); |
| if (ret < 0) |
| { |
| if (*remote_errno != FILEIO_ENOSYS) |
| return ret; |
| |
| /* Strictly we should return -1, ENOSYS here, but when |
| "set sysroot remote:" was implemented in August 2008 |
| BFD's need for a stat function was sidestepped with |
| this hack. This was not remedied until March 2015 |
| so we retain the previous behavior to avoid breaking |
| compatibility. |
| |
| Note that the memset is a March 2015 addition; older |
| GDBs set st_size *and nothing else* so the structure |
| would have garbage in all other fields. This might |
| break something but retaining the previous behavior |
| here would be just too wrong. */ |
| |
| memset (st, 0, sizeof (struct stat)); |
| st->st_size = INT_MAX; |
| return 0; |
| } |
| |
| read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len, |
| (gdb_byte *) &fst, sizeof (fst)); |
| |
| if (read_len != ret) |
| error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len); |
| |
| if (read_len != sizeof (fst)) |
| error (_("vFile:fstat returned %d bytes, but expecting %d."), |
| read_len, (int) sizeof (fst)); |
| |
| remote_fileio_to_host_stat (&fst, st); |
| |
| return 0; |
| } |
| |
| /* Implementation of to_filesystem_is_local. */ |
| |
| static int |
| remote_filesystem_is_local (struct target_ops *self) |
| { |
| /* Valgrind GDB presents itself as a remote target but works |
| on the local filesystem: it does not implement remote get |
| and users are not expected to set a sysroot. To handle |
| this case we treat the remote filesystem as local if the |
| sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub |
| does not support vFile:open. */ |
| if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0) |
| { |
| enum packet_support ps = packet_support (PACKET_vFile_open); |
| |
| if (ps == PACKET_SUPPORT_UNKNOWN) |
| { |
| int fd, remote_errno; |
| |
| /* Try opening a file to probe support. The supplied |
| filename is irrelevant, we only care about whether |
| the stub recognizes the packet or not. */ |
| fd = remote_hostio_open (self, NULL, "just probing", |
| FILEIO_O_RDONLY, 0700, 0, |
| &remote_errno); |
| |
| if (fd >= 0) |
| remote_hostio_close (self, fd, &remote_errno); |
| |
| ps = packet_support (PACKET_vFile_open); |
| } |
| |
| if (ps == PACKET_DISABLE) |
| { |
| static int warning_issued = 0; |
| |
| if (!warning_issued) |
| { |
| warning (_("remote target does not support file" |
| " transfer, attempting to access files" |
| " from local filesystem.")); |
| warning_issued = 1; |
| } |
| |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int |
| remote_fileio_errno_to_host (int errnum) |
| { |
| switch (errnum) |
| { |
| case FILEIO_EPERM: |
| return EPERM; |
| case FILEIO_ENOENT: |
| return ENOENT; |
| case FILEIO_EINTR: |
| return EINTR; |
| case FILEIO_EIO: |
| return EIO; |
| case FILEIO_EBADF: |
| return EBADF; |
| case FILEIO_EACCES: |
| return EACCES; |
| case FILEIO_EFAULT: |
| return EFAULT; |
| case FILEIO_EBUSY: |
| return EBUSY; |
| case FILEIO_EEXIST: |
| return EEXIST; |
| case FILEIO_ENODEV: |
| return ENODEV; |
| case FILEIO_ENOTDIR: |
| return ENOTDIR; |
| case FILEIO_EISDIR: |
| return EISDIR; |
| case FILEIO_EINVAL: |
| return EINVAL; |
| case FILEIO_ENFILE: |
| return ENFILE; |
| case FILEIO_EMFILE: |
| return EMFILE; |
| case FILEIO_EFBIG: |
| return EFBIG; |
| case FILEIO_ENOSPC: |
| return ENOSPC; |
| case FILEIO_ESPIPE: |
| return ESPIPE; |
| case FILEIO_EROFS: |
| return EROFS; |
| case FILEIO_ENOSYS: |
| return ENOSYS; |
| case FILEIO_ENAMETOOLONG: |
| return ENAMETOOLONG; |
| } |
| return -1; |
| } |
| |
| static char * |
| remote_hostio_error (int errnum) |
| { |
| int host_error = remote_fileio_errno_to_host (errnum); |
| |
| if (host_error == -1) |
| error (_("Unknown remote I/O error %d"), errnum); |
| else |
| error (_("Remote I/O error: %s"), safe_strerror (host_error)); |
| } |
| |
| static void |
| remote_hostio_close_cleanup (void *opaque) |
| { |
| int fd = *(int *) opaque; |
| int remote_errno; |
| |
| remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno); |
| } |
| |
| void |
| remote_file_put (const char *local_file, const char *remote_file, int from_tty) |
| { |
| struct cleanup *back_to, *close_cleanup; |
| int retcode, fd, remote_errno, bytes, io_size; |
| FILE *file; |
| gdb_byte *buffer; |
| int bytes_in_buffer; |
| int saw_eof; |
| ULONGEST offset; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!rs->remote_desc) |
| error (_("command can only be used with remote target")); |
| |
| file = gdb_fopen_cloexec (local_file, "rb"); |
| if (file == NULL) |
| perror_with_name (local_file); |
| back_to = make_cleanup_fclose (file); |
| |
| fd = remote_hostio_open (find_target_at (process_stratum), NULL, |
| remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT |
| | FILEIO_O_TRUNC), |
| 0700, 0, &remote_errno); |
| if (fd == -1) |
| remote_hostio_error (remote_errno); |
| |
| /* Send up to this many bytes at once. They won't all fit in the |
| remote packet limit, so we'll transfer slightly fewer. */ |
| io_size = get_remote_packet_size (); |
| buffer = (gdb_byte *) xmalloc (io_size); |
| make_cleanup (xfree, buffer); |
| |
| close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| |
| bytes_in_buffer = 0; |
| saw_eof = 0; |
| offset = 0; |
| while (bytes_in_buffer || !saw_eof) |
| { |
| if (!saw_eof) |
| { |
| bytes = fread (buffer + bytes_in_buffer, 1, |
| io_size - bytes_in_buffer, |
| file); |
| if (bytes == 0) |
| { |
| if (ferror (file)) |
| error (_("Error reading %s."), local_file); |
| else |
| { |
| /* EOF. Unless there is something still in the |
| buffer from the last iteration, we are done. */ |
| saw_eof = 1; |
| if (bytes_in_buffer == 0) |
| break; |
| } |
| } |
| } |
| else |
| bytes = 0; |
| |
| bytes += bytes_in_buffer; |
| bytes_in_buffer = 0; |
| |
| retcode = remote_hostio_pwrite (find_target_at (process_stratum), |
| fd, buffer, bytes, |
| offset, &remote_errno); |
| |
| if (retcode < 0) |
| remote_hostio_error (remote_errno); |
| else if (retcode == 0) |
| error (_("Remote write of %d bytes returned 0!"), bytes); |
| else if (retcode < bytes) |
| { |
| /* Short write. Save the rest of the read data for the next |
| write. */ |
| bytes_in_buffer = bytes - retcode; |
| memmove (buffer, buffer + retcode, bytes_in_buffer); |
| } |
| |
| offset += retcode; |
| } |
| |
| discard_cleanups (close_cleanup); |
| if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) |
| remote_hostio_error (remote_errno); |
| |
| if (from_tty) |
| printf_filtered (_("Successfully sent file \"%s\".\n"), local_file); |
| do_cleanups (back_to); |
| } |
| |
| void |
| remote_file_get (const char *remote_file, const char *local_file, int from_tty) |
| { |
| struct cleanup *back_to, *close_cleanup; |
| int fd, remote_errno, bytes, io_size; |
| FILE *file; |
| gdb_byte *buffer; |
| ULONGEST offset; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!rs->remote_desc) |
| error (_("command can only be used with remote target")); |
| |
| fd = remote_hostio_open (find_target_at (process_stratum), NULL, |
| remote_file, FILEIO_O_RDONLY, 0, 0, |
| &remote_errno); |
| if (fd == -1) |
| remote_hostio_error (remote_errno); |
| |
| file = gdb_fopen_cloexec (local_file, "wb"); |
| if (file == NULL) |
| perror_with_name (local_file); |
| back_to = make_cleanup_fclose (file); |
| |
| /* Send up to this many bytes at once. They won't all fit in the |
| remote packet limit, so we'll transfer slightly fewer. */ |
| io_size = get_remote_packet_size (); |
| buffer = (gdb_byte *) xmalloc (io_size); |
| make_cleanup (xfree, buffer); |
| |
| close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); |
| |
| offset = 0; |
| while (1) |
| { |
| bytes = remote_hostio_pread (find_target_at (process_stratum), |
| fd, buffer, io_size, offset, &remote_errno); |
| if (bytes == 0) |
| /* Success, but no bytes, means end-of-file. */ |
| break; |
| if (bytes == -1) |
| remote_hostio_error (remote_errno); |
| |
| offset += bytes; |
| |
| bytes = fwrite (buffer, 1, bytes, file); |
| if (bytes == 0) |
| perror_with_name (local_file); |
| } |
| |
| discard_cleanups (close_cleanup); |
| if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno)) |
| remote_hostio_error (remote_errno); |
| |
| if (from_tty) |
| printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file); |
| do_cleanups (back_to); |
| } |
| |
| void |
| remote_file_delete (const char *remote_file, int from_tty) |
| { |
| int retcode, remote_errno; |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!rs->remote_desc) |
| error (_("command can only be used with remote target")); |
| |
| retcode = remote_hostio_unlink (find_target_at (process_stratum), |
| NULL, remote_file, &remote_errno); |
| if (retcode == -1) |
| remote_hostio_error (remote_errno); |
| |
| if (from_tty) |
| printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file); |
| } |
| |
| static void |
| remote_put_command (char *args, int from_tty) |
| { |
| struct cleanup *back_to; |
| char **argv; |
| |
| if (args == NULL) |
| error_no_arg (_("file to put")); |
| |
| argv = gdb_buildargv (args); |
| back_to = make_cleanup_freeargv (argv); |
| if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| error (_("Invalid parameters to remote put")); |
| |
| remote_file_put (argv[0], argv[1], from_tty); |
| |
| do_cleanups (back_to); |
| } |
| |
| static void |
| remote_get_command (char *args, int from_tty) |
| { |
| struct cleanup *back_to; |
| char **argv; |
| |
| if (args == NULL) |
| error_no_arg (_("file to get")); |
| |
| argv = gdb_buildargv (args); |
| back_to = make_cleanup_freeargv (argv); |
| if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) |
| error (_("Invalid parameters to remote get")); |
| |
| remote_file_get (argv[0], argv[1], from_tty); |
| |
| do_cleanups (back_to); |
| } |
| |
| static void |
| remote_delete_command (char *args, int from_tty) |
| { |
| struct cleanup *back_to; |
| char **argv; |
| |
| if (args == NULL) |
| error_no_arg (_("file to delete")); |
| |
| argv = gdb_buildargv (args); |
| back_to = make_cleanup_freeargv (argv); |
| if (argv[0] == NULL || argv[1] != NULL) |
| error (_("Invalid parameters to remote delete")); |
| |
| remote_file_delete (argv[0], from_tty); |
| |
| do_cleanups (back_to); |
| } |
| |
| static void |
| remote_command (char *args, int from_tty) |
| { |
| help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout); |
| } |
| |
| static int |
| remote_can_execute_reverse (struct target_ops *self) |
| { |
| if (packet_support (PACKET_bs) == PACKET_ENABLE |
| || packet_support (PACKET_bc) == PACKET_ENABLE) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int |
| remote_supports_non_stop (struct target_ops *self) |
| { |
| return 1; |
| } |
| |
| static int |
| remote_supports_disable_randomization (struct target_ops *self) |
| { |
| /* Only supported in extended mode. */ |
| return 0; |
| } |
| |
| static int |
| remote_supports_multi_process (struct target_ops *self) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| return remote_multi_process_p (rs); |
| } |
| |
| static int |
| remote_supports_cond_tracepoints (void) |
| { |
| return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_supports_cond_breakpoints (struct target_ops *self) |
| { |
| return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_supports_fast_tracepoints (void) |
| { |
| return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_supports_static_tracepoints (void) |
| { |
| return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_supports_install_in_trace (void) |
| { |
| return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_supports_enable_disable_tracepoint (struct target_ops *self) |
| { |
| return (packet_support (PACKET_EnableDisableTracepoints_feature) |
| == PACKET_ENABLE); |
| } |
| |
| static int |
| remote_supports_string_tracing (struct target_ops *self) |
| { |
| return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE; |
| } |
| |
| static int |
| remote_can_run_breakpoint_commands (struct target_ops *self) |
| { |
| return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE; |
| } |
| |
| static void |
| remote_trace_init (struct target_ops *self) |
| { |
| putpkt ("QTinit"); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK") != 0) |
| error (_("Target does not support this command.")); |
| } |
| |
| static void free_actions_list (char **actions_list); |
| static void free_actions_list_cleanup_wrapper (void *); |
| static void |
| free_actions_list_cleanup_wrapper (void *al) |
| { |
| free_actions_list ((char **) al); |
| } |
| |
| static void |
| free_actions_list (char **actions_list) |
| { |
| int ndx; |
| |
| if (actions_list == 0) |
| return; |
| |
| for (ndx = 0; actions_list[ndx]; ndx++) |
| xfree (actions_list[ndx]); |
| |
| xfree (actions_list); |
| } |
| |
| /* Recursive routine to walk through command list including loops, and |
| download packets for each command. */ |
| |
| static void |
| remote_download_command_source (int num, ULONGEST addr, |
| struct command_line *cmds) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct command_line *cmd; |
| |
| for (cmd = cmds; cmd; cmd = cmd->next) |
| { |
| QUIT; /* Allow user to bail out with ^C. */ |
| strcpy (rs->buf, "QTDPsrc:"); |
| encode_source_string (num, addr, "cmd", cmd->line, |
| rs->buf + strlen (rs->buf), |
| rs->buf_size - strlen (rs->buf)); |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| warning (_("Target does not support source download.")); |
| |
| if (cmd->control_type == while_control |
| || cmd->control_type == while_stepping_control) |
| { |
| remote_download_command_source (num, addr, *cmd->body_list); |
| |
| QUIT; /* Allow user to bail out with ^C. */ |
| strcpy (rs->buf, "QTDPsrc:"); |
| encode_source_string (num, addr, "cmd", "end", |
| rs->buf + strlen (rs->buf), |
| rs->buf_size - strlen (rs->buf)); |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| warning (_("Target does not support source download.")); |
| } |
| } |
| } |
| |
| static void |
| remote_download_tracepoint (struct target_ops *self, struct bp_location *loc) |
| { |
| #define BUF_SIZE 2048 |
| |
| CORE_ADDR tpaddr; |
| char addrbuf[40]; |
| char buf[BUF_SIZE]; |
| char **tdp_actions; |
| char **stepping_actions; |
| int ndx; |
| struct cleanup *old_chain = NULL; |
| struct agent_expr *aexpr; |
| struct cleanup *aexpr_chain = NULL; |
| char *pkt; |
| struct breakpoint *b = loc->owner; |
| struct tracepoint *t = (struct tracepoint *) b; |
| |
| encode_actions_rsp (loc, &tdp_actions, &stepping_actions); |
| old_chain = make_cleanup (free_actions_list_cleanup_wrapper, |
| tdp_actions); |
| (void) make_cleanup (free_actions_list_cleanup_wrapper, |
| stepping_actions); |
| |
| tpaddr = loc->address; |
| sprintf_vma (addrbuf, tpaddr); |
| xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number, |
| addrbuf, /* address */ |
| (b->enable_state == bp_enabled ? 'E' : 'D'), |
| t->step_count, t->pass_count); |
| /* Fast tracepoints are mostly handled by the target, but we can |
| tell the target how big of an instruction block should be moved |
| around. */ |
| if (b->type == bp_fast_tracepoint) |
| { |
| /* Only test for support at download time; we may not know |
| target capabilities at definition time. */ |
| if (remote_supports_fast_tracepoints ()) |
| { |
| if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr, |
| NULL)) |
| xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x", |
| gdb_insn_length (loc->gdbarch, tpaddr)); |
| else |
| /* If it passed validation at definition but fails now, |
| something is very wrong. */ |
| internal_error (__FILE__, __LINE__, |
| _("Fast tracepoint not " |
| "valid during download")); |
| } |
| else |
| /* Fast tracepoints are functionally identical to regular |
| tracepoints, so don't take lack of support as a reason to |
| give up on the trace run. */ |
| warning (_("Target does not support fast tracepoints, " |
| "downloading %d as regular tracepoint"), b->number); |
| } |
| else if (b->type == bp_static_tracepoint) |
| { |
| /* Only test for support at download time; we may not know |
| target capabilities at definition time. */ |
| if (remote_supports_static_tracepoints ()) |
| { |
| struct static_tracepoint_marker marker; |
| |
| if (target_static_tracepoint_marker_at (tpaddr, &marker)) |
| strcat (buf, ":S"); |
| else |
| error (_("Static tracepoint not valid during download")); |
| } |
| else |
| /* Fast tracepoints are functionally identical to regular |
| tracepoints, so don't take lack of support as a reason |
| to give up on the trace run. */ |
| error (_("Target does not support static tracepoints")); |
| } |
| /* If the tracepoint has a conditional, make it into an agent |
| expression and append to the definition. */ |
| if (loc->cond) |
| { |
| /* Only test support at download time, we may not know target |
| capabilities at definition time. */ |
| if (remote_supports_cond_tracepoints ()) |
| { |
| aexpr = gen_eval_for_expr (tpaddr, loc->cond); |
| aexpr_chain = make_cleanup_free_agent_expr (aexpr); |
| xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,", |
| aexpr->len); |
| pkt = buf + strlen (buf); |
| for (ndx = 0; ndx < aexpr->len; ++ndx) |
| pkt = pack_hex_byte (pkt, aexpr->buf[ndx]); |
| *pkt = '\0'; |
| do_cleanups (aexpr_chain); |
| } |
| else |
| warning (_("Target does not support conditional tracepoints, " |
| "ignoring tp %d cond"), b->number); |
| } |
| |
| if (b->commands || *default_collect) |
| strcat (buf, "-"); |
| putpkt (buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| error (_("Target does not support tracepoints.")); |
| |
| /* do_single_steps (t); */ |
| if (tdp_actions) |
| { |
| for (ndx = 0; tdp_actions[ndx]; ndx++) |
| { |
| QUIT; /* Allow user to bail out with ^C. */ |
| xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c", |
| b->number, addrbuf, /* address */ |
| tdp_actions[ndx], |
| ((tdp_actions[ndx + 1] || stepping_actions) |
| ? '-' : 0)); |
| putpkt (buf); |
| remote_get_noisy_reply (&target_buf, |
| &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| error (_("Error on target while setting tracepoints.")); |
| } |
| } |
| if (stepping_actions) |
| { |
| for (ndx = 0; stepping_actions[ndx]; ndx++) |
| { |
| QUIT; /* Allow user to bail out with ^C. */ |
| xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s", |
| b->number, addrbuf, /* address */ |
| ((ndx == 0) ? "S" : ""), |
| stepping_actions[ndx], |
| (stepping_actions[ndx + 1] ? "-" : "")); |
| putpkt (buf); |
| remote_get_noisy_reply (&target_buf, |
| &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| error (_("Error on target while setting tracepoints.")); |
| } |
| } |
| |
| if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE) |
| { |
| if (b->location != NULL) |
| { |
| strcpy (buf, "QTDPsrc:"); |
| encode_source_string (b->number, loc->address, "at", |
| event_location_to_string (b->location), |
| buf + strlen (buf), 2048 - strlen (buf)); |
| putpkt (buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| warning (_("Target does not support source download.")); |
| } |
| if (b->cond_string) |
| { |
| strcpy (buf, "QTDPsrc:"); |
| encode_source_string (b->number, loc->address, |
| "cond", b->cond_string, buf + strlen (buf), |
| 2048 - strlen (buf)); |
| putpkt (buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (strcmp (target_buf, "OK")) |
| warning (_("Target does not support source download.")); |
| } |
| remote_download_command_source (b->number, loc->address, |
| breakpoint_commands (b)); |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| static int |
| remote_can_download_tracepoint (struct target_ops *self) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct trace_status *ts; |
| int status; |
| |
| /* Don't try to install tracepoints until we've relocated our |
| symbols, and fetched and merged the target's tracepoint list with |
| ours. */ |
| if (rs->starting_up) |
| return 0; |
| |
| ts = current_trace_status (); |
| status = remote_get_trace_status (self, ts); |
| |
| if (status == -1 || !ts->running_known || !ts->running) |
| return 0; |
| |
| /* If we are in a tracing experiment, but remote stub doesn't support |
| installing tracepoint in trace, we have to return. */ |
| if (!remote_supports_install_in_trace ()) |
| return 0; |
| |
| return 1; |
| } |
| |
| |
| static void |
| remote_download_trace_state_variable (struct target_ops *self, |
| struct trace_state_variable *tsv) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p; |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:", |
| tsv->number, phex ((ULONGEST) tsv->initial_value, 8), |
| tsv->builtin); |
| p = rs->buf + strlen (rs->buf); |
| if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ()) |
| error (_("Trace state variable name too long for tsv definition packet")); |
| p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name)); |
| *p++ = '\0'; |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*target_buf == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (target_buf, "OK") != 0) |
| error (_("Error on target while downloading trace state variable.")); |
| } |
| |
| static void |
| remote_enable_tracepoint (struct target_ops *self, |
| struct bp_location *location) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char addr_buf[40]; |
| |
| sprintf_vma (addr_buf, location->address); |
| xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s", |
| location->owner->number, addr_buf); |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&rs->buf, &rs->buf_size); |
| if (*rs->buf == '\0') |
| error (_("Target does not support enabling tracepoints while a trace run is ongoing.")); |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Error on target while enabling tracepoint.")); |
| } |
| |
| static void |
| remote_disable_tracepoint (struct target_ops *self, |
| struct bp_location *location) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char addr_buf[40]; |
| |
| sprintf_vma (addr_buf, location->address); |
| xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s", |
| location->owner->number, addr_buf); |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&rs->buf, &rs->buf_size); |
| if (*rs->buf == '\0') |
| error (_("Target does not support disabling tracepoints while a trace run is ongoing.")); |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Error on target while disabling tracepoint.")); |
| } |
| |
| static void |
| remote_trace_set_readonly_regions (struct target_ops *self) |
| { |
| asection *s; |
| bfd *abfd = NULL; |
| bfd_size_type size; |
| bfd_vma vma; |
| int anysecs = 0; |
| int offset = 0; |
| |
| if (!exec_bfd) |
| return; /* No information to give. */ |
| |
| strcpy (target_buf, "QTro"); |
| offset = strlen (target_buf); |
| for (s = exec_bfd->sections; s; s = s->next) |
| { |
| char tmp1[40], tmp2[40]; |
| int sec_length; |
| |
| if ((s->flags & SEC_LOAD) == 0 || |
| /* (s->flags & SEC_CODE) == 0 || */ |
| (s->flags & SEC_READONLY) == 0) |
| continue; |
| |
| anysecs = 1; |
| vma = bfd_get_section_vma (abfd, s); |
| size = bfd_get_section_size (s); |
| sprintf_vma (tmp1, vma); |
| sprintf_vma (tmp2, vma + size); |
| sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2); |
| if (offset + sec_length + 1 > target_buf_size) |
| { |
| if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE) |
| warning (_("\ |
| Too many sections for read-only sections definition packet.")); |
| break; |
| } |
| xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s", |
| tmp1, tmp2); |
| offset += sec_length; |
| } |
| if (anysecs) |
| { |
| putpkt (target_buf); |
| getpkt (&target_buf, &target_buf_size, 0); |
| } |
| } |
| |
| static void |
| remote_trace_start (struct target_ops *self) |
| { |
| putpkt ("QTStart"); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*target_buf == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (target_buf, "OK") != 0) |
| error (_("Bogus reply from target: %s"), target_buf); |
| } |
| |
| static int |
| remote_get_trace_status (struct target_ops *self, struct trace_status *ts) |
| { |
| /* Initialize it just to avoid a GCC false warning. */ |
| char *p = NULL; |
| /* FIXME we need to get register block size some other way. */ |
| extern int trace_regblock_size; |
| enum packet_result result; |
| |
| if (packet_support (PACKET_qTStatus) == PACKET_DISABLE) |
| return -1; |
| |
| trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet; |
| |
| putpkt ("qTStatus"); |
| |
| TRY |
| { |
| p = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| } |
| CATCH (ex, RETURN_MASK_ERROR) |
| { |
| if (ex.error != TARGET_CLOSE_ERROR) |
| { |
| exception_fprintf (gdb_stderr, ex, "qTStatus: "); |
| return -1; |
| } |
| throw_exception (ex); |
| } |
| END_CATCH |
| |
| result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]); |
| |
| /* If the remote target doesn't do tracing, flag it. */ |
| if (result == PACKET_UNKNOWN) |
| return -1; |
| |
| /* We're working with a live target. */ |
| ts->filename = NULL; |
| |
| if (*p++ != 'T') |
| error (_("Bogus trace status reply from target: %s"), target_buf); |
| |
| /* Function 'parse_trace_status' sets default value of each field of |
| 'ts' at first, so we don't have to do it here. */ |
| parse_trace_status (p, ts); |
| |
| return ts->running; |
| } |
| |
| static void |
| remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp, |
| struct uploaded_tp *utp) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| struct bp_location *loc; |
| struct tracepoint *tp = (struct tracepoint *) bp; |
| size_t size = get_remote_packet_size (); |
| |
| if (tp) |
| { |
| tp->base.hit_count = 0; |
| tp->traceframe_usage = 0; |
| for (loc = tp->base.loc; loc; loc = loc->next) |
| { |
| /* If the tracepoint was never downloaded, don't go asking for |
| any status. */ |
| if (tp->number_on_target == 0) |
| continue; |
| xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target, |
| phex_nz (loc->address, 0)); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (reply && *reply) |
| { |
| if (*reply == 'V') |
| parse_tracepoint_status (reply + 1, bp, utp); |
| } |
| } |
| } |
| else if (utp) |
| { |
| utp->hit_count = 0; |
| utp->traceframe_usage = 0; |
| xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number, |
| phex_nz (utp->addr, 0)); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (reply && *reply) |
| { |
| if (*reply == 'V') |
| parse_tracepoint_status (reply + 1, bp, utp); |
| } |
| } |
| } |
| |
| static void |
| remote_trace_stop (struct target_ops *self) |
| { |
| putpkt ("QTStop"); |
| remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*target_buf == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (target_buf, "OK") != 0) |
| error (_("Bogus reply from target: %s"), target_buf); |
| } |
| |
| static int |
| remote_trace_find (struct target_ops *self, |
| enum trace_find_type type, int num, |
| CORE_ADDR addr1, CORE_ADDR addr2, |
| int *tpp) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| char *p, *reply; |
| int target_frameno = -1, target_tracept = -1; |
| |
| /* Lookups other than by absolute frame number depend on the current |
| trace selected, so make sure it is correct on the remote end |
| first. */ |
| if (type != tfind_number) |
| set_remote_traceframe (); |
| |
| p = rs->buf; |
| strcpy (p, "QTFrame:"); |
| p = strchr (p, '\0'); |
| switch (type) |
| { |
| case tfind_number: |
| xsnprintf (p, endbuf - p, "%x", num); |
| break; |
| case tfind_pc: |
| xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0)); |
| break; |
| case tfind_tp: |
| xsnprintf (p, endbuf - p, "tdp:%x", num); |
| break; |
| case tfind_range: |
| xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0), |
| phex_nz (addr2, 0)); |
| break; |
| case tfind_outside: |
| xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0), |
| phex_nz (addr2, 0)); |
| break; |
| default: |
| error (_("Unknown trace find type %d"), type); |
| } |
| |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size); |
| if (*reply == '\0') |
| error (_("Target does not support this command.")); |
| |
| while (reply && *reply) |
| switch (*reply) |
| { |
| case 'F': |
| p = ++reply; |
| target_frameno = (int) strtol (p, &reply, 16); |
| if (reply == p) |
| error (_("Unable to parse trace frame number")); |
| /* Don't update our remote traceframe number cache on failure |
| to select a remote traceframe. */ |
| if (target_frameno == -1) |
| return -1; |
| break; |
| case 'T': |
| p = ++reply; |
| target_tracept = (int) strtol (p, &reply, 16); |
| if (reply == p) |
| error (_("Unable to parse tracepoint number")); |
| break; |
| case 'O': /* "OK"? */ |
| if (reply[1] == 'K' && reply[2] == '\0') |
| reply += 2; |
| else |
| error (_("Bogus reply from target: %s"), reply); |
| break; |
| default: |
| error (_("Bogus reply from target: %s"), reply); |
| } |
| if (tpp) |
| *tpp = target_tracept; |
| |
| rs->remote_traceframe_number = target_frameno; |
| return target_frameno; |
| } |
| |
| static int |
| remote_get_trace_state_variable_value (struct target_ops *self, |
| int tsvnum, LONGEST *val) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| ULONGEST uval; |
| |
| set_remote_traceframe (); |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (reply && *reply) |
| { |
| if (*reply == 'V') |
| { |
| unpack_varlen_hex (reply + 1, &uval); |
| *val = (LONGEST) uval; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int |
| remote_save_trace_data (struct target_ops *self, const char *filename) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p, *reply; |
| |
| p = rs->buf; |
| strcpy (p, "QTSave:"); |
| p += strlen (p); |
| if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ()) |
| error (_("Remote file name too long for trace save packet")); |
| p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename)); |
| *p++ = '\0'; |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (reply, "OK") != 0) |
| error (_("Bogus reply from target: %s"), reply); |
| return 0; |
| } |
| |
| /* This is basically a memory transfer, but needs to be its own packet |
| because we don't know how the target actually organizes its trace |
| memory, plus we want to be able to ask for as much as possible, but |
| not be unhappy if we don't get as much as we ask for. */ |
| |
| static LONGEST |
| remote_get_raw_trace_data (struct target_ops *self, |
| gdb_byte *buf, ULONGEST offset, LONGEST len) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| char *p; |
| int rslt; |
| |
| p = rs->buf; |
| strcpy (p, "qTBuffer:"); |
| p += strlen (p); |
| p += hexnumstr (p, offset); |
| *p++ = ','; |
| p += hexnumstr (p, len); |
| *p++ = '\0'; |
| |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (reply && *reply) |
| { |
| /* 'l' by itself means we're at the end of the buffer and |
| there is nothing more to get. */ |
| if (*reply == 'l') |
| return 0; |
| |
| /* Convert the reply into binary. Limit the number of bytes to |
| convert according to our passed-in buffer size, rather than |
| what was returned in the packet; if the target is |
| unexpectedly generous and gives us a bigger reply than we |
| asked for, we don't want to crash. */ |
| rslt = hex2bin (target_buf, buf, len); |
| return rslt; |
| } |
| |
| /* Something went wrong, flag as an error. */ |
| return -1; |
| } |
| |
| static void |
| remote_set_disconnected_tracing (struct target_ops *self, int val) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE) |
| { |
| char *reply; |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (reply, "OK") != 0) |
| error (_("Bogus reply from target: %s"), reply); |
| } |
| else if (val) |
| warning (_("Target does not support disconnected tracing.")); |
| } |
| |
| static int |
| remote_core_of_thread (struct target_ops *ops, ptid_t ptid) |
| { |
| struct thread_info *info = find_thread_ptid (ptid); |
| |
| if (info && info->priv) |
| return info->priv->core; |
| return -1; |
| } |
| |
| static void |
| remote_set_circular_trace_buffer (struct target_ops *self, int val) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| error (_("Target does not support this command.")); |
| if (strcmp (reply, "OK") != 0) |
| error (_("Bogus reply from target: %s"), reply); |
| } |
| |
| static struct traceframe_info * |
| remote_traceframe_info (struct target_ops *self) |
| { |
| char *text; |
| |
| text = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_TRACEFRAME_INFO, NULL); |
| if (text != NULL) |
| { |
| struct traceframe_info *info; |
| struct cleanup *back_to = make_cleanup (xfree, text); |
| |
| info = parse_traceframe_info (text); |
| do_cleanups (back_to); |
| return info; |
| } |
| |
| return NULL; |
| } |
| |
| /* Handle the qTMinFTPILen packet. Returns the minimum length of |
| instruction on which a fast tracepoint may be placed. Returns -1 |
| if the packet is not supported, and 0 if the minimum instruction |
| length is unknown. */ |
| |
| static int |
| remote_get_min_fast_tracepoint_insn_len (struct target_ops *self) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| |
| /* If we're not debugging a process yet, the IPA can't be |
| loaded. */ |
| if (!target_has_execution) |
| return 0; |
| |
| /* Make sure the remote is pointing at the right process. */ |
| set_general_process (); |
| |
| xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen"); |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| return -1; |
| else |
| { |
| ULONGEST min_insn_len; |
| |
| unpack_varlen_hex (reply, &min_insn_len); |
| |
| return (int) min_insn_len; |
| } |
| } |
| |
| static void |
| remote_set_trace_buffer_size (struct target_ops *self, LONGEST val) |
| { |
| if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| enum packet_result result; |
| |
| gdb_assert (val >= 0 || val == -1); |
| buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:"); |
| /* Send -1 as literal "-1" to avoid host size dependency. */ |
| if (val < 0) |
| { |
| *buf++ = '-'; |
| buf += hexnumstr (buf, (ULONGEST) -val); |
| } |
| else |
| buf += hexnumstr (buf, (ULONGEST) val); |
| |
| putpkt (rs->buf); |
| remote_get_noisy_reply (&rs->buf, &rs->buf_size); |
| result = packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_QTBuffer_size]); |
| |
| if (result != PACKET_OK) |
| warning (_("Bogus reply from target: %s"), rs->buf); |
| } |
| } |
| |
| static int |
| remote_set_trace_notes (struct target_ops *self, |
| const char *user, const char *notes, |
| const char *stop_notes) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *reply; |
| char *buf = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| int nbytes; |
| |
| buf += xsnprintf (buf, endbuf - buf, "QTNotes:"); |
| if (user) |
| { |
| buf += xsnprintf (buf, endbuf - buf, "user:"); |
| nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user)); |
| buf += 2 * nbytes; |
| *buf++ = ';'; |
| } |
| if (notes) |
| { |
| buf += xsnprintf (buf, endbuf - buf, "notes:"); |
| nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes)); |
| buf += 2 * nbytes; |
| *buf++ = ';'; |
| } |
| if (stop_notes) |
| { |
| buf += xsnprintf (buf, endbuf - buf, "tstop:"); |
| nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes)); |
| buf += 2 * nbytes; |
| *buf++ = ';'; |
| } |
| /* Ensure the buffer is terminated. */ |
| *buf = '\0'; |
| |
| putpkt (rs->buf); |
| reply = remote_get_noisy_reply (&target_buf, &target_buf_size); |
| if (*reply == '\0') |
| return 0; |
| |
| if (strcmp (reply, "OK") != 0) |
| error (_("Bogus reply from target: %s"), reply); |
| |
| return 1; |
| } |
| |
| static int |
| remote_use_agent (struct target_ops *self, int use) |
| { |
| if (packet_support (PACKET_QAgent) != PACKET_DISABLE) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* If the stub supports QAgent. */ |
| xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (strcmp (rs->buf, "OK") == 0) |
| { |
| use_agent = use; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int |
| remote_can_use_agent (struct target_ops *self) |
| { |
| return (packet_support (PACKET_QAgent) != PACKET_DISABLE); |
| } |
| |
| struct btrace_target_info |
| { |
| /* The ptid of the traced thread. */ |
| ptid_t ptid; |
| |
| /* The obtained branch trace configuration. */ |
| struct btrace_config conf; |
| }; |
| |
| /* Reset our idea of our target's btrace configuration. */ |
| |
| static void |
| remote_btrace_reset (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| memset (&rs->btrace_config, 0, sizeof (rs->btrace_config)); |
| } |
| |
| /* Check whether the target supports branch tracing. */ |
| |
| static int |
| remote_supports_btrace (struct target_ops *self, enum btrace_format format) |
| { |
| if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE) |
| return 0; |
| if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE) |
| return 0; |
| |
| switch (format) |
| { |
| case BTRACE_FORMAT_NONE: |
| return 0; |
| |
| case BTRACE_FORMAT_BTS: |
| return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE); |
| |
| case BTRACE_FORMAT_PT: |
| /* The trace is decoded on the host. Even if our target supports it, |
| we still need to have libipt to decode the trace. */ |
| #if defined (HAVE_LIBIPT) |
| return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE); |
| #else /* !defined (HAVE_LIBIPT) */ |
| return 0; |
| #endif /* !defined (HAVE_LIBIPT) */ |
| } |
| |
| internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); |
| } |
| |
| /* Synchronize the configuration with the target. */ |
| |
| static void |
| btrace_sync_conf (const struct btrace_config *conf) |
| { |
| struct packet_config *packet; |
| struct remote_state *rs; |
| char *buf, *pos, *endbuf; |
| |
| rs = get_remote_state (); |
| buf = rs->buf; |
| endbuf = buf + get_remote_packet_size (); |
| |
| packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size]; |
| if (packet_config_support (packet) == PACKET_ENABLE |
| && conf->bts.size != rs->btrace_config.bts.size) |
| { |
| pos = buf; |
| pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, |
| conf->bts.size); |
| |
| putpkt (buf); |
| getpkt (&buf, &rs->buf_size, 0); |
| |
| if (packet_ok (buf, packet) == PACKET_ERROR) |
| { |
| if (buf[0] == 'E' && buf[1] == '.') |
| error (_("Failed to configure the BTS buffer size: %s"), buf + 2); |
| else |
| error (_("Failed to configure the BTS buffer size.")); |
| } |
| |
| rs->btrace_config.bts.size = conf->bts.size; |
| } |
| |
| packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size]; |
| if (packet_config_support (packet) == PACKET_ENABLE |
| && conf->pt.size != rs->btrace_config.pt.size) |
| { |
| pos = buf; |
| pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name, |
| conf->pt.size); |
| |
| putpkt (buf); |
| getpkt (&buf, &rs->buf_size, 0); |
| |
| if (packet_ok (buf, packet) == PACKET_ERROR) |
| { |
| if (buf[0] == 'E' && buf[1] == '.') |
| error (_("Failed to configure the trace buffer size: %s"), buf + 2); |
| else |
| error (_("Failed to configure the trace buffer size.")); |
| } |
| |
| rs->btrace_config.pt.size = conf->pt.size; |
| } |
| } |
| |
| /* Read the current thread's btrace configuration from the target and |
| store it into CONF. */ |
| |
| static void |
| btrace_read_config (struct btrace_config *conf) |
| { |
| char *xml; |
| |
| xml = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_BTRACE_CONF, ""); |
| if (xml != NULL) |
| { |
| struct cleanup *cleanup; |
| |
| cleanup = make_cleanup (xfree, xml); |
| parse_xml_btrace_conf (conf, xml); |
| do_cleanups (cleanup); |
| } |
| } |
| |
| /* Enable branch tracing. */ |
| |
| static struct btrace_target_info * |
| remote_enable_btrace (struct target_ops *self, ptid_t ptid, |
| const struct btrace_config *conf) |
| { |
| struct btrace_target_info *tinfo = NULL; |
| struct packet_config *packet = NULL; |
| struct remote_state *rs = get_remote_state (); |
| char *buf = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| |
| switch (conf->format) |
| { |
| case BTRACE_FORMAT_BTS: |
| packet = &remote_protocol_packets[PACKET_Qbtrace_bts]; |
| break; |
| |
| case BTRACE_FORMAT_PT: |
| packet = &remote_protocol_packets[PACKET_Qbtrace_pt]; |
| break; |
| } |
| |
| if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE) |
| error (_("Target does not support branch tracing.")); |
| |
| btrace_sync_conf (conf); |
| |
| set_general_thread (ptid); |
| |
| buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (packet_ok (rs->buf, packet) == PACKET_ERROR) |
| { |
| if (rs->buf[0] == 'E' && rs->buf[1] == '.') |
| error (_("Could not enable branch tracing for %s: %s"), |
| target_pid_to_str (ptid), rs->buf + 2); |
| else |
| error (_("Could not enable branch tracing for %s."), |
| target_pid_to_str (ptid)); |
| } |
| |
| tinfo = XCNEW (struct btrace_target_info); |
| tinfo->ptid = ptid; |
| |
| /* If we fail to read the configuration, we lose some information, but the |
| tracing itself is not impacted. */ |
| TRY |
| { |
| btrace_read_config (&tinfo->conf); |
| } |
| CATCH (err, RETURN_MASK_ERROR) |
| { |
| if (err.message != NULL) |
| warning ("%s", err.message); |
| } |
| END_CATCH |
| |
| return tinfo; |
| } |
| |
| /* Disable branch tracing. */ |
| |
| static void |
| remote_disable_btrace (struct target_ops *self, |
| struct btrace_target_info *tinfo) |
| { |
| struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off]; |
| struct remote_state *rs = get_remote_state (); |
| char *buf = rs->buf; |
| char *endbuf = rs->buf + get_remote_packet_size (); |
| |
| if (packet_config_support (packet) != PACKET_ENABLE) |
| error (_("Target does not support branch tracing.")); |
| |
| set_general_thread (tinfo->ptid); |
| |
| buf += xsnprintf (buf, endbuf - buf, "%s", packet->name); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| if (packet_ok (rs->buf, packet) == PACKET_ERROR) |
| { |
| if (rs->buf[0] == 'E' && rs->buf[1] == '.') |
| error (_("Could not disable branch tracing for %s: %s"), |
| target_pid_to_str (tinfo->ptid), rs->buf + 2); |
| else |
| error (_("Could not disable branch tracing for %s."), |
| target_pid_to_str (tinfo->ptid)); |
| } |
| |
| xfree (tinfo); |
| } |
| |
| /* Teardown branch tracing. */ |
| |
| static void |
| remote_teardown_btrace (struct target_ops *self, |
| struct btrace_target_info *tinfo) |
| { |
| /* We must not talk to the target during teardown. */ |
| xfree (tinfo); |
| } |
| |
| /* Read the branch trace. */ |
| |
| static enum btrace_error |
| remote_read_btrace (struct target_ops *self, |
| struct btrace_data *btrace, |
| struct btrace_target_info *tinfo, |
| enum btrace_read_type type) |
| { |
| struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace]; |
| struct cleanup *cleanup; |
| const char *annex; |
| char *xml; |
| |
| if (packet_config_support (packet) != PACKET_ENABLE) |
| error (_("Target does not support branch tracing.")); |
| |
| #if !defined(HAVE_LIBEXPAT) |
| error (_("Cannot process branch tracing result. XML parsing not supported.")); |
| #endif |
| |
| switch (type) |
| { |
| case BTRACE_READ_ALL: |
| annex = "all"; |
| break; |
| case BTRACE_READ_NEW: |
| annex = "new"; |
| break; |
| case BTRACE_READ_DELTA: |
| annex = "delta"; |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, |
| _("Bad branch tracing read type: %u."), |
| (unsigned int) type); |
| } |
| |
| xml = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_BTRACE, annex); |
| if (xml == NULL) |
| return BTRACE_ERR_UNKNOWN; |
| |
| cleanup = make_cleanup (xfree, xml); |
| parse_xml_btrace (btrace, xml); |
| do_cleanups (cleanup); |
| |
| return BTRACE_ERR_NONE; |
| } |
| |
| static const struct btrace_config * |
| remote_btrace_conf (struct target_ops *self, |
| const struct btrace_target_info *tinfo) |
| { |
| return &tinfo->conf; |
| } |
| |
| static int |
| remote_augmented_libraries_svr4_read (struct target_ops *self) |
| { |
| return (packet_support (PACKET_augmented_libraries_svr4_read_feature) |
| == PACKET_ENABLE); |
| } |
| |
| /* Implementation of to_load. */ |
| |
| static void |
| remote_load (struct target_ops *self, const char *name, int from_tty) |
| { |
| generic_load (name, from_tty); |
| } |
| |
| /* Accepts an integer PID; returns a string representing a file that |
| can be opened on the remote side to get the symbols for the child |
| process. Returns NULL if the operation is not supported. */ |
| |
| static char * |
| remote_pid_to_exec_file (struct target_ops *self, int pid) |
| { |
| static char *filename = NULL; |
| struct inferior *inf; |
| char *annex = NULL; |
| |
| if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE) |
| return NULL; |
| |
| if (filename != NULL) |
| xfree (filename); |
| |
| inf = find_inferior_pid (pid); |
| if (inf == NULL) |
| internal_error (__FILE__, __LINE__, |
| _("not currently attached to process %d"), pid); |
| |
| if (!inf->fake_pid_p) |
| { |
| const int annex_size = 9; |
| |
| annex = (char *) alloca (annex_size); |
| xsnprintf (annex, annex_size, "%x", pid); |
| } |
| |
| filename = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_EXEC_FILE, annex); |
| |
| return filename; |
| } |
| |
| /* Implement the to_can_do_single_step target_ops method. */ |
| |
| static int |
| remote_can_do_single_step (struct target_ops *ops) |
| { |
| /* We can only tell whether target supports single step or not by |
| supported s and S vCont actions if the stub supports vContSupported |
| feature. If the stub doesn't support vContSupported feature, |
| we have conservatively to think target doesn't supports single |
| step. */ |
| if (packet_support (PACKET_vContSupported) == PACKET_ENABLE) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| remote_vcont_probe (rs); |
| |
| return rs->supports_vCont.s && rs->supports_vCont.S; |
| } |
| else |
| return 0; |
| } |
| |
| static void |
| init_remote_ops (void) |
| { |
| remote_ops.to_shortname = "remote"; |
| remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; |
| remote_ops.to_doc = |
| "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| Specify the serial device it is connected to\n\ |
| (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; |
| remote_ops.to_open = remote_open; |
| remote_ops.to_close = remote_close; |
| remote_ops.to_detach = remote_detach; |
| remote_ops.to_disconnect = remote_disconnect; |
| remote_ops.to_resume = remote_resume; |
| remote_ops.to_wait = remote_wait; |
| remote_ops.to_fetch_registers = remote_fetch_registers; |
| remote_ops.to_store_registers = remote_store_registers; |
| remote_ops.to_prepare_to_store = remote_prepare_to_store; |
| remote_ops.to_files_info = remote_files_info; |
| remote_ops.to_insert_breakpoint = remote_insert_breakpoint; |
| remote_ops.to_remove_breakpoint = remote_remove_breakpoint; |
| remote_ops.to_stopped_by_sw_breakpoint = remote_stopped_by_sw_breakpoint; |
| remote_ops.to_supports_stopped_by_sw_breakpoint = remote_supports_stopped_by_sw_breakpoint; |
| remote_ops.to_stopped_by_hw_breakpoint = remote_stopped_by_hw_breakpoint; |
| remote_ops.to_supports_stopped_by_hw_breakpoint = remote_supports_stopped_by_hw_breakpoint; |
| remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
| remote_ops.to_stopped_data_address = remote_stopped_data_address; |
| remote_ops.to_watchpoint_addr_within_range = |
| remote_watchpoint_addr_within_range; |
| remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
| remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
| remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
| remote_ops.to_region_ok_for_hw_watchpoint |
| = remote_region_ok_for_hw_watchpoint; |
| remote_ops.to_insert_watchpoint = remote_insert_watchpoint; |
| remote_ops.to_remove_watchpoint = remote_remove_watchpoint; |
| remote_ops.to_kill = remote_kill; |
| remote_ops.to_load = remote_load; |
| remote_ops.to_mourn_inferior = remote_mourn; |
| remote_ops.to_pass_signals = remote_pass_signals; |
| remote_ops.to_set_syscall_catchpoint = remote_set_syscall_catchpoint; |
| remote_ops.to_program_signals = remote_program_signals; |
| remote_ops.to_thread_alive = remote_thread_alive; |
| remote_ops.to_thread_name = remote_thread_name; |
| remote_ops.to_update_thread_list = remote_update_thread_list; |
| remote_ops.to_pid_to_str = remote_pid_to_str; |
| remote_ops.to_extra_thread_info = remote_threads_extra_info; |
| remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid; |
| remote_ops.to_stop = remote_stop; |
| remote_ops.to_interrupt = remote_interrupt; |
| remote_ops.to_check_pending_interrupt = remote_check_pending_interrupt; |
| remote_ops.to_xfer_partial = remote_xfer_partial; |
| remote_ops.to_rcmd = remote_rcmd; |
| remote_ops.to_pid_to_exec_file = remote_pid_to_exec_file; |
| remote_ops.to_log_command = serial_log_command; |
| remote_ops.to_get_thread_local_address = remote_get_thread_local_address; |
| remote_ops.to_stratum = process_stratum; |
| remote_ops.to_has_all_memory = default_child_has_all_memory; |
| remote_ops.to_has_memory = default_child_has_memory; |
| remote_ops.to_has_stack = default_child_has_stack; |
| remote_ops.to_has_registers = default_child_has_registers; |
| remote_ops.to_has_execution = default_child_has_execution; |
| remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
| remote_ops.to_can_execute_reverse = remote_can_execute_reverse; |
| remote_ops.to_magic = OPS_MAGIC; |
| remote_ops.to_memory_map = remote_memory_map; |
| remote_ops.to_flash_erase = remote_flash_erase; |
| remote_ops.to_flash_done = remote_flash_done; |
| remote_ops.to_read_description = remote_read_description; |
| remote_ops.to_search_memory = remote_search_memory; |
| remote_ops.to_can_async_p = remote_can_async_p; |
| remote_ops.to_is_async_p = remote_is_async_p; |
| remote_ops.to_async = remote_async; |
| remote_ops.to_thread_events = remote_thread_events; |
| remote_ops.to_can_do_single_step = remote_can_do_single_step; |
| remote_ops.to_terminal_inferior = remote_terminal_inferior; |
| remote_ops.to_terminal_ours = remote_terminal_ours; |
| remote_ops.to_supports_non_stop = remote_supports_non_stop; |
| remote_ops.to_supports_multi_process = remote_supports_multi_process; |
| remote_ops.to_supports_disable_randomization |
| = remote_supports_disable_randomization; |
| remote_ops.to_filesystem_is_local = remote_filesystem_is_local; |
| remote_ops.to_fileio_open = remote_hostio_open; |
| remote_ops.to_fileio_pwrite = remote_hostio_pwrite; |
| remote_ops.to_fileio_pread = remote_hostio_pread; |
| remote_ops.to_fileio_fstat = remote_hostio_fstat; |
| remote_ops.to_fileio_close = remote_hostio_close; |
| remote_ops.to_fileio_unlink = remote_hostio_unlink; |
| remote_ops.to_fileio_readlink = remote_hostio_readlink; |
| remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint; |
| remote_ops.to_supports_string_tracing = remote_supports_string_tracing; |
| remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints; |
| remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands; |
| remote_ops.to_trace_init = remote_trace_init; |
| remote_ops.to_download_tracepoint = remote_download_tracepoint; |
| remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint; |
| remote_ops.to_download_trace_state_variable |
| = remote_download_trace_state_variable; |
| remote_ops.to_enable_tracepoint = remote_enable_tracepoint; |
| remote_ops.to_disable_tracepoint = remote_disable_tracepoint; |
| remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions; |
| remote_ops.to_trace_start = remote_trace_start; |
| remote_ops.to_get_trace_status = remote_get_trace_status; |
| remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status; |
| remote_ops.to_trace_stop = remote_trace_stop; |
| remote_ops.to_trace_find = remote_trace_find; |
| remote_ops.to_get_trace_state_variable_value |
| = remote_get_trace_state_variable_value; |
| remote_ops.to_save_trace_data = remote_save_trace_data; |
| remote_ops.to_upload_tracepoints = remote_upload_tracepoints; |
| remote_ops.to_upload_trace_state_variables |
| = remote_upload_trace_state_variables; |
| remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data; |
| remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len; |
| remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing; |
| remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer; |
| remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size; |
| remote_ops.to_set_trace_notes = remote_set_trace_notes; |
| remote_ops.to_core_of_thread = remote_core_of_thread; |
| remote_ops.to_verify_memory = remote_verify_memory; |
| remote_ops.to_get_tib_address = remote_get_tib_address; |
| remote_ops.to_set_permissions = remote_set_permissions; |
| remote_ops.to_static_tracepoint_marker_at |
| = remote_static_tracepoint_marker_at; |
| remote_ops.to_static_tracepoint_markers_by_strid |
| = remote_static_tracepoint_markers_by_strid; |
| remote_ops.to_traceframe_info = remote_traceframe_info; |
| remote_ops.to_use_agent = remote_use_agent; |
| remote_ops.to_can_use_agent = remote_can_use_agent; |
| remote_ops.to_supports_btrace = remote_supports_btrace; |
| remote_ops.to_enable_btrace = remote_enable_btrace; |
| remote_ops.to_disable_btrace = remote_disable_btrace; |
| remote_ops.to_teardown_btrace = remote_teardown_btrace; |
| remote_ops.to_read_btrace = remote_read_btrace; |
| remote_ops.to_btrace_conf = remote_btrace_conf; |
| remote_ops.to_augmented_libraries_svr4_read = |
| remote_augmented_libraries_svr4_read; |
| remote_ops.to_follow_fork = remote_follow_fork; |
| remote_ops.to_follow_exec = remote_follow_exec; |
| remote_ops.to_insert_fork_catchpoint = remote_insert_fork_catchpoint; |
| remote_ops.to_remove_fork_catchpoint = remote_remove_fork_catchpoint; |
| remote_ops.to_insert_vfork_catchpoint = remote_insert_vfork_catchpoint; |
| remote_ops.to_remove_vfork_catchpoint = remote_remove_vfork_catchpoint; |
| remote_ops.to_insert_exec_catchpoint = remote_insert_exec_catchpoint; |
| remote_ops.to_remove_exec_catchpoint = remote_remove_exec_catchpoint; |
| } |
| |
| /* Set up the extended remote vector by making a copy of the standard |
| remote vector and adding to it. */ |
| |
| static void |
| init_extended_remote_ops (void) |
| { |
| extended_remote_ops = remote_ops; |
| |
| extended_remote_ops.to_shortname = "extended-remote"; |
| extended_remote_ops.to_longname = |
| "Extended remote serial target in gdb-specific protocol"; |
| extended_remote_ops.to_doc = |
| "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
| Specify the serial device it is connected to (e.g. /dev/ttya)."; |
| extended_remote_ops.to_open = extended_remote_open; |
| extended_remote_ops.to_create_inferior = extended_remote_create_inferior; |
| extended_remote_ops.to_detach = extended_remote_detach; |
| extended_remote_ops.to_attach = extended_remote_attach; |
| extended_remote_ops.to_post_attach = extended_remote_post_attach; |
| extended_remote_ops.to_supports_disable_randomization |
| = extended_remote_supports_disable_randomization; |
| } |
| |
| static int |
| remote_can_async_p (struct target_ops *ops) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!target_async_permitted) |
| /* We only enable async when the user specifically asks for it. */ |
| return 0; |
| |
| /* We're async whenever the serial device is. */ |
| return serial_can_async_p (rs->remote_desc); |
| } |
| |
| static int |
| remote_is_async_p (struct target_ops *ops) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (!target_async_permitted) |
| /* We only enable async when the user specifically asks for it. */ |
| return 0; |
| |
| /* We're async whenever the serial device is. */ |
| return serial_is_async_p (rs->remote_desc); |
| } |
| |
| /* Pass the SERIAL event on and up to the client. One day this code |
| will be able to delay notifying the client of an event until the |
| point where an entire packet has been received. */ |
| |
| static serial_event_ftype remote_async_serial_handler; |
| |
| static void |
| remote_async_serial_handler (struct serial *scb, void *context) |
| { |
| /* Don't propogate error information up to the client. Instead let |
| the client find out about the error by querying the target. */ |
| inferior_event_handler (INF_REG_EVENT, NULL); |
| } |
| |
| static void |
| remote_async_inferior_event_handler (gdb_client_data data) |
| { |
| inferior_event_handler (INF_REG_EVENT, NULL); |
| } |
| |
| static void |
| remote_async (struct target_ops *ops, int enable) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (enable) |
| { |
| serial_async (rs->remote_desc, remote_async_serial_handler, rs); |
| |
| /* If there are pending events in the stop reply queue tell the |
| event loop to process them. */ |
| if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue)) |
| mark_async_event_handler (remote_async_inferior_event_token); |
| /* For simplicity, below we clear the pending events token |
| without remembering whether it is marked, so here we always |
| mark it. If there's actually no pending notification to |
| process, this ends up being a no-op (other than a spurious |
| event-loop wakeup). */ |
| if (target_is_non_stop_p ()) |
| mark_async_event_handler (rs->notif_state->get_pending_events_token); |
| } |
| else |
| { |
| serial_async (rs->remote_desc, NULL, NULL); |
| /* If the core is disabling async, it doesn't want to be |
| disturbed with target events. Clear all async event sources |
| too. */ |
| clear_async_event_handler (remote_async_inferior_event_token); |
| if (target_is_non_stop_p ()) |
| clear_async_event_handler (rs->notif_state->get_pending_events_token); |
| } |
| } |
| |
| /* Implementation of the to_thread_events method. */ |
| |
| static void |
| remote_thread_events (struct target_ops *ops, int enable) |
| { |
| struct remote_state *rs = get_remote_state (); |
| size_t size = get_remote_packet_size (); |
| |
| if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE) |
| return; |
| |
| xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0); |
| putpkt (rs->buf); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| |
| switch (packet_ok (rs->buf, |
| &remote_protocol_packets[PACKET_QThreadEvents])) |
| { |
| case PACKET_OK: |
| if (strcmp (rs->buf, "OK") != 0) |
| error (_("Remote refused setting thread events: %s"), rs->buf); |
| break; |
| case PACKET_ERROR: |
| warning (_("Remote failure reply: %s"), rs->buf); |
| break; |
| case PACKET_UNKNOWN: |
| break; |
| } |
| } |
| |
| static void |
| set_remote_cmd (char *args, int from_tty) |
| { |
| help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout); |
| } |
| |
| static void |
| show_remote_cmd (char *args, int from_tty) |
| { |
| /* We can't just use cmd_show_list here, because we want to skip |
| the redundant "show remote Z-packet" and the legacy aliases. */ |
| struct cleanup *showlist_chain; |
| struct cmd_list_element *list = remote_show_cmdlist; |
| struct ui_out *uiout = current_uiout; |
| |
| showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist"); |
| for (; list != NULL; list = list->next) |
| if (strcmp (list->name, "Z-packet") == 0) |
| continue; |
| else if (list->type == not_set_cmd) |
| /* Alias commands are exactly like the original, except they |
| don't have the normal type. */ |
| continue; |
| else |
| { |
| struct cleanup *option_chain |
| = make_cleanup_ui_out_tuple_begin_end (uiout, "option"); |
| |
| ui_out_field_string (uiout, "name", list->name); |
| ui_out_text (uiout, ": "); |
| if (list->type == show_cmd) |
| do_show_command ((char *) NULL, from_tty, list); |
| else |
| cmd_func (list, NULL, from_tty); |
| /* Close the tuple. */ |
| do_cleanups (option_chain); |
| } |
| |
| /* Close the tuple. */ |
| do_cleanups (showlist_chain); |
| } |
| |
| |
| /* Function to be called whenever a new objfile (shlib) is detected. */ |
| static void |
| remote_new_objfile (struct objfile *objfile) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| if (rs->remote_desc != 0) /* Have a remote connection. */ |
| remote_check_symbols (); |
| } |
| |
| /* Pull all the tracepoints defined on the target and create local |
| data structures representing them. We don't want to create real |
| tracepoints yet, we don't want to mess up the user's existing |
| collection. */ |
| |
| static int |
| remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p; |
| |
| /* Ask for a first packet of tracepoint definition. */ |
| putpkt ("qTfP"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| while (*p && *p != 'l') |
| { |
| parse_tracepoint_definition (p, utpp); |
| /* Ask for another packet of tracepoint definition. */ |
| putpkt ("qTsP"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| } |
| return 0; |
| } |
| |
| static int |
| remote_upload_trace_state_variables (struct target_ops *self, |
| struct uploaded_tsv **utsvp) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *p; |
| |
| /* Ask for a first packet of variable definition. */ |
| putpkt ("qTfV"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| while (*p && *p != 'l') |
| { |
| parse_tsv_definition (p, utsvp); |
| /* Ask for another packet of variable definition. */ |
| putpkt ("qTsV"); |
| getpkt (&rs->buf, &rs->buf_size, 0); |
| p = rs->buf; |
| } |
| return 0; |
| } |
| |
| /* The "set/show range-stepping" show hook. */ |
| |
| static void |
| show_range_stepping (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, |
| _("Debugger's willingness to use range stepping " |
| "is %s.\n"), value); |
| } |
| |
| /* The "set/show range-stepping" set hook. */ |
| |
| static void |
| set_range_stepping (char *ignore_args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| struct remote_state *rs = get_remote_state (); |
| |
| /* Whene enabling, check whether range stepping is actually |
| supported by the target, and warn if not. */ |
| if (use_range_stepping) |
| { |
| if (rs->remote_desc != NULL) |
| { |
| if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN) |
| remote_vcont_probe (rs); |
| |
| if (packet_support (PACKET_vCont) == PACKET_ENABLE |
| && rs->supports_vCont.r) |
| return; |
| } |
| |
| warning (_("Range stepping is not supported by the current target")); |
| } |
| } |
| |
| void |
| _initialize_remote (void) |
| { |
| struct cmd_list_element *cmd; |
| const char *cmd_name; |
| |
| /* architecture specific data */ |
| remote_gdbarch_data_handle = |
| gdbarch_data_register_post_init (init_remote_state); |
| remote_g_packet_data_handle = |
| gdbarch_data_register_pre_init (remote_g_packet_data_init); |
| |
| remote_pspace_data |
| = register_program_space_data_with_cleanup (NULL, |
| remote_pspace_data_cleanup); |
| |
| /* Initialize the per-target state. At the moment there is only one |
| of these, not one per target. Only one target is active at a |
| time. */ |
| remote_state = new_remote_state (); |
| |
| init_remote_ops (); |
| add_target (&remote_ops); |
| |
| init_extended_remote_ops (); |
| add_target (&extended_remote_ops); |
| |
| /* Hook into new objfile notification. */ |
| observer_attach_new_objfile (remote_new_objfile); |
| /* We're no longer interested in notification events of an inferior |
| when it exits. */ |
| observer_attach_inferior_exit (discard_pending_stop_replies); |
| |
| /* Set up signal handlers. */ |
| async_sigint_remote_token = |
| create_async_signal_handler (async_remote_interrupt, NULL); |
| async_sigint_remote_twice_token = |
| create_async_signal_handler (async_remote_interrupt_twice, NULL); |
| |
| #if 0 |
| init_remote_threadtests (); |
| #endif |
| |
| stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree); |
| /* set/show remote ... */ |
| |
| add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\ |
| Remote protocol specific variables\n\ |
| Configure various remote-protocol specific variables such as\n\ |
| the packets being used"), |
| &remote_set_cmdlist, "set remote ", |
| 0 /* allow-unknown */, &setlist); |
| add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\ |
| Remote protocol specific variables\n\ |
| Configure various remote-protocol specific variables such as\n\ |
| the packets being used"), |
| &remote_show_cmdlist, "show remote ", |
| 0 /* allow-unknown */, &showlist); |
| |
| add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\ |
| Compare section data on target to the exec file.\n\ |
| Argument is a single section name (default: all loaded sections).\n\ |
| To compare only read-only loaded sections, specify the -r option."), |
| &cmdlist); |
| |
| add_cmd ("packet", class_maintenance, packet_command, _("\ |
| Send an arbitrary packet to a remote target.\n\ |
| maintenance packet TEXT\n\ |
| If GDB is talking to an inferior via the GDB serial protocol, then\n\ |
| this command sends the string TEXT to the inferior, and displays the\n\ |
| response packet. GDB supplies the initial `$' character, and the\n\ |
| terminating `#' character and checksum."), |
| &maintenancelist); |
| |
| add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\ |
| Set whether to send break if interrupted."), _("\ |
| Show whether to send break if interrupted."), _("\ |
| If set, a break, instead of a cntrl-c, is sent to the remote target."), |
| set_remotebreak, show_remotebreak, |
| &setlist, &showlist); |
| cmd_name = "remotebreak"; |
| cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1); |
| deprecate_cmd (cmd, "set remote interrupt-sequence"); |
| cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */ |
| cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1); |
| deprecate_cmd (cmd, "show remote interrupt-sequence"); |
| |
| add_setshow_enum_cmd ("interrupt-sequence", class_support, |
| interrupt_sequence_modes, &interrupt_sequence_mode, |
| _("\ |
| Set interrupt sequence to remote target."), _("\ |
| Show interrupt sequence to remote target."), _("\ |
| Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."), |
| NULL, show_interrupt_sequence, |
| &remote_set_cmdlist, |
| &remote_show_cmdlist); |
| |
| add_setshow_boolean_cmd ("interrupt-on-connect", class_support, |
| &interrupt_on_connect, _("\ |
| Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ |
| Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \ |
| If set, interrupt sequence is sent to remote target."), |
| NULL, NULL, |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| |
| /* Install commands for configuring memory read/write packets. */ |
| |
| add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\ |
| Set the maximum number of bytes per memory write packet (deprecated)."), |
| &setlist); |
| add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\ |
| Show the maximum number of bytes per memory write packet (deprecated)."), |
| &showlist); |
| add_cmd ("memory-write-packet-size", no_class, |
| set_memory_write_packet_size, _("\ |
| Set the maximum number of bytes per memory-write packet.\n\ |
| Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| default packet size. The actual limit is further reduced\n\ |
| dependent on the target. Specify ``fixed'' to disable the\n\ |
| further restriction and ``limit'' to enable that restriction."), |
| &remote_set_cmdlist); |
| add_cmd ("memory-read-packet-size", no_class, |
| set_memory_read_packet_size, _("\ |
| Set the maximum number of bytes per memory-read packet.\n\ |
| Specify the number of bytes in a packet or 0 (zero) for the\n\ |
| default packet size. The actual limit is further reduced\n\ |
| dependent on the target. Specify ``fixed'' to disable the\n\ |
| further restriction and ``limit'' to enable that restriction."), |
| &remote_set_cmdlist); |
| add_cmd ("memory-write-packet-size", no_class, |
| show_memory_write_packet_size, |
| _("Show the maximum number of bytes per memory-write packet."), |
| &remote_show_cmdlist); |
| add_cmd ("memory-read-packet-size", no_class, |
| show_memory_read_packet_size, |
| _("Show the maximum number of bytes per memory-read packet."), |
| &remote_show_cmdlist); |
| |
| add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, |
| &remote_hw_watchpoint_limit, _("\ |
| Set the maximum number of target hardware watchpoints."), _("\ |
| Show the maximum number of target hardware watchpoints."), _("\ |
| Specify a negative limit for unlimited."), |
| NULL, NULL, /* FIXME: i18n: The maximum |
| number of target hardware |
| watchpoints is %s. */ |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class, |
| &remote_hw_watchpoint_length_limit, _("\ |
| Set the maximum length (in bytes) of a target hardware watchpoint."), _("\ |
| Show the maximum length (in bytes) of a target hardware watchpoint."), _("\ |
| Specify a negative limit for unlimited."), |
| NULL, NULL, /* FIXME: i18n: The maximum |
| length (in bytes) of a target |
| hardware watchpoint is %s. */ |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, |
| &remote_hw_breakpoint_limit, _("\ |
| Set the maximum number of target hardware breakpoints."), _("\ |
| Show the maximum number of target hardware breakpoints."), _("\ |
| Specify a negative limit for unlimited."), |
| NULL, NULL, /* FIXME: i18n: The maximum |
| number of target hardware |
| breakpoints is %s. */ |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| |
| add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure, |
| &remote_address_size, _("\ |
| Set the maximum size of the address (in bits) in a memory packet."), _("\ |
| Show the maximum size of the address (in bits) in a memory packet."), NULL, |
| NULL, |
| NULL, /* FIXME: i18n: */ |
| &setlist, &showlist); |
| |
| init_all_packet_configs (); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_X], |
| "X", "binary-download", 1); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont], |
| "vCont", "verbose-resume", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals], |
| "QPassSignals", "pass-signals", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls], |
| "QCatchSyscalls", "catch-syscalls", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals], |
| "QProgramSignals", "program-signals", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol], |
| "qSymbol", "symbol-lookup", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_P], |
| "P", "set-register", 1); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_p], |
| "p", "fetch-register", 1); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0], |
| "Z0", "software-breakpoint", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1], |
| "Z1", "hardware-breakpoint", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2], |
| "Z2", "write-watchpoint", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3], |
| "Z3", "read-watchpoint", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4], |
| "Z4", "access-watchpoint", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv], |
| "qXfer:auxv:read", "read-aux-vector", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file], |
| "qXfer:exec-file:read", "pid-to-exec-file", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features], |
| "qXfer:features:read", "target-features", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries], |
| "qXfer:libraries:read", "library-info", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4], |
| "qXfer:libraries-svr4:read", "library-info-svr4", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map], |
| "qXfer:memory-map:read", "memory-map", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read], |
| "qXfer:spu:read", "read-spu-object", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write], |
| "qXfer:spu:write", "write-spu-object", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata], |
| "qXfer:osdata:read", "osdata", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads], |
| "qXfer:threads:read", "threads", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read], |
| "qXfer:siginfo:read", "read-siginfo-object", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write], |
| "qXfer:siginfo:write", "write-siginfo-object", 0); |
| |
| add_packet_config_cmd |
| (&remote_protocol_packets[PACKET_qXfer_traceframe_info], |
| "qXfer:traceframe-info:read", "traceframe-info", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib], |
| "qXfer:uib:read", "unwind-info-block", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr], |
| "qGetTLSAddr", "get-thread-local-storage-address", |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr], |
| "qGetTIBAddr", "get-thread-information-block-address", |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_bc], |
| "bc", "reverse-continue", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_bs], |
| "bs", "reverse-step", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported], |
| "qSupported", "supported-packets", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory], |
| "qSearch:memory", "search-memory", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus], |
| "qTStatus", "trace-status", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs], |
| "vFile:setfs", "hostio-setfs", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open], |
| "vFile:open", "hostio-open", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread], |
| "vFile:pread", "hostio-pread", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite], |
| "vFile:pwrite", "hostio-pwrite", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close], |
| "vFile:close", "hostio-close", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink], |
| "vFile:unlink", "hostio-unlink", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink], |
| "vFile:readlink", "hostio-readlink", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat], |
| "vFile:fstat", "hostio-fstat", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach], |
| "vAttach", "attach", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun], |
| "vRun", "run", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode], |
| "QStartNoAckMode", "noack", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill], |
| "vKill", "kill", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached], |
| "qAttached", "query-attached", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints], |
| "ConditionalTracepoints", |
| "conditional-tracepoints", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints], |
| "ConditionalBreakpoints", |
| "conditional-breakpoints", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands], |
| "BreakpointCommands", |
| "breakpoint-commands", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints], |
| "FastTracepoints", "fast-tracepoints", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource], |
| "TracepointSource", "TracepointSource", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow], |
| "QAllow", "allow", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints], |
| "StaticTracepoints", "static-tracepoints", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace], |
| "InstallInTrace", "install-in-trace", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read], |
| "qXfer:statictrace:read", "read-sdata-object", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic], |
| "qXfer:fdpic:read", "read-fdpic-loadmap", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization], |
| "QDisableRandomization", "disable-randomization", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent], |
| "QAgent", "agent", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size], |
| "QTBuffer:size", "trace-buffer-size", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off], |
| "Qbtrace:off", "disable-btrace", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts], |
| "Qbtrace:bts", "enable-btrace-bts", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt], |
| "Qbtrace:pt", "enable-btrace-pt", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace], |
| "qXfer:btrace", "read-btrace", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf], |
| "qXfer:btrace-conf", "read-btrace-conf", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size], |
| "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature], |
| "multiprocess-feature", "multiprocess-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature], |
| "swbreak-feature", "swbreak-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature], |
| "hwbreak-feature", "hwbreak-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature], |
| "fork-event-feature", "fork-event-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature], |
| "vfork-event-feature", "vfork-event-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size], |
| "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported], |
| "vContSupported", "verbose-resume-supported", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature], |
| "exec-event-feature", "exec-event-feature", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC], |
| "vCtrlC", "ctrl-c", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents], |
| "QThreadEvents", "thread-events", 0); |
| |
| add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed], |
| "N stop reply", "no-resumed-stop-reply", 0); |
| |
| /* Assert that we've registered "set remote foo-packet" commands |
| for all packet configs. */ |
| { |
| int i; |
| |
| for (i = 0; i < PACKET_MAX; i++) |
| { |
| /* Ideally all configs would have a command associated. Some |
| still don't though. */ |
| int excepted; |
| |
| switch (i) |
| { |
| case PACKET_QNonStop: |
| case PACKET_EnableDisableTracepoints_feature: |
| case PACKET_tracenz_feature: |
| case PACKET_DisconnectedTracing_feature: |
| case PACKET_augmented_libraries_svr4_read_feature: |
| case PACKET_qCRC: |
| /* Additions to this list need to be well justified: |
| pre-existing packets are OK; new packets are not. */ |
| excepted = 1; |
| break; |
| default: |
| excepted = 0; |
| break; |
| } |
| |
| /* This catches both forgetting to add a config command, and |
| forgetting to remove a packet from the exception list. */ |
| gdb_assert (excepted == (remote_protocol_packets[i].name == NULL)); |
| } |
| } |
| |
| /* Keep the old ``set remote Z-packet ...'' working. Each individual |
| Z sub-packet has its own set and show commands, but users may |
| have sets to this variable in their .gdbinit files (or in their |
| documentation). */ |
| add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, |
| &remote_Z_packet_detect, _("\ |
| Set use of remote protocol `Z' packets"), _("\ |
| Show use of remote protocol `Z' packets "), _("\ |
| When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ |
| packets."), |
| set_remote_protocol_Z_packet_cmd, |
| show_remote_protocol_Z_packet_cmd, |
| /* FIXME: i18n: Use of remote protocol |
| `Z' packets is %s. */ |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| |
| add_prefix_cmd ("remote", class_files, remote_command, _("\ |
| Manipulate files on the remote system\n\ |
| Transfer files to and from the remote target system."), |
| &remote_cmdlist, "remote ", |
| 0 /* allow-unknown */, &cmdlist); |
| |
| add_cmd ("put", class_files, remote_put_command, |
| _("Copy a local file to the remote system."), |
| &remote_cmdlist); |
| |
| add_cmd ("get", class_files, remote_get_command, |
| _("Copy a remote file to the local system."), |
| &remote_cmdlist); |
| |
| add_cmd ("delete", class_files, remote_delete_command, |
| _("Delete a remote file."), |
| &remote_cmdlist); |
| |
| add_setshow_string_noescape_cmd ("exec-file", class_files, |
| &remote_exec_file_var, _("\ |
| Set the remote pathname for \"run\""), _("\ |
| Show the remote pathname for \"run\""), NULL, |
| set_remote_exec_file, |
| show_remote_exec_file, |
| &remote_set_cmdlist, |
| &remote_show_cmdlist); |
| |
| add_setshow_boolean_cmd ("range-stepping", class_run, |
| &use_range_stepping, _("\ |
| Enable or disable range stepping."), _("\ |
| Show whether target-assisted range stepping is enabled."), _("\ |
| If on, and the target supports it, when stepping a source line, GDB\n\ |
| tells the target to step the corresponding range of addresses itself instead\n\ |
| of issuing multiple single-steps. This speeds up source level\n\ |
| stepping. If off, GDB always issues single-steps, even if range\n\ |
| stepping is supported by the target. The default is on."), |
| set_range_stepping, |
| show_range_stepping, |
| &setlist, |
| &showlist); |
| |
| /* Eventually initialize fileio. See fileio.c */ |
| initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); |
| |
| /* Take advantage of the fact that the TID field is not used, to tag |
| special ptids with it set to != 0. */ |
| magic_null_ptid = ptid_build (42000, -1, 1); |
| not_sent_ptid = ptid_build (42000, -2, 1); |
| any_thread_ptid = ptid_build (42000, 0, 1); |
| |
| target_buf_size = 2048; |
| target_buf = (char *) xmalloc (target_buf_size); |
| } |
| |