| /* Remote target communications for serial-line targets in custom GDB protocol |
| |
| Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
| 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
| 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* See the GDB User Guide for details of the GDB remote protocol. */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include <ctype.h> |
| #include <fcntl.h> |
| #include "inferior.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 "regcache.h" |
| #include "value.h" |
| #include "gdb_assert.h" |
| |
| #include <ctype.h> |
| #include <sys/time.h> |
| #ifdef USG |
| #include <sys/types.h> |
| #endif |
| |
| #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" |
| |
| /* Prototypes for local functions */ |
| static void cleanup_sigint_signal_handler (void *dummy); |
| static void initialize_sigint_signal_handler (void); |
| static int getpkt_sane (char *buf, long sizeof_buf, int forever); |
| |
| static void handle_remote_sigint (int); |
| static void handle_remote_sigint_twice (int); |
| static void async_remote_interrupt (gdb_client_data); |
| void async_remote_interrupt_twice (gdb_client_data); |
| |
| static void build_remote_gdbarch_data (void); |
| |
| static void remote_files_info (struct target_ops *ignore); |
| |
| static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr, |
| int len, int should_write, |
| struct mem_attrib *attrib, |
| struct target_ops *target); |
| |
| static void remote_prepare_to_store (void); |
| |
| static void remote_fetch_registers (int regno); |
| |
| static void remote_resume (ptid_t ptid, int step, |
| enum target_signal siggnal); |
| static void remote_async_resume (ptid_t ptid, int step, |
| enum target_signal siggnal); |
| static int remote_start_remote (struct ui_out *uiout, void *dummy); |
| |
| static void remote_open (char *name, int from_tty); |
| static void remote_async_open (char *name, int from_tty); |
| |
| static void extended_remote_open (char *name, int from_tty); |
| static void extended_remote_async_open (char *name, int from_tty); |
| |
| static void remote_open_1 (char *, int, struct target_ops *, int extended_p, |
| int async_p); |
| |
| static void remote_close (int quitting); |
| |
| static void remote_store_registers (int regno); |
| |
| static void remote_mourn (void); |
| static void remote_async_mourn (void); |
| |
| static void extended_remote_restart (void); |
| |
| static void extended_remote_mourn (void); |
| |
| static void remote_mourn_1 (struct target_ops *); |
| |
| static void remote_send (char *buf, long sizeof_buf); |
| |
| static int readchar (int timeout); |
| |
| static ptid_t remote_wait (ptid_t ptid, |
| struct target_waitstatus *status); |
| static ptid_t remote_async_wait (ptid_t ptid, |
| struct target_waitstatus *status); |
| |
| static void remote_kill (void); |
| static void remote_async_kill (void); |
| |
| static int tohex (int nib); |
| |
| static void remote_detach (char *args, int from_tty); |
| |
| static void remote_interrupt (int signo); |
| |
| static void remote_interrupt_twice (int signo); |
| |
| static void interrupt_query (void); |
| |
| static void set_thread (int, int); |
| |
| static int remote_thread_alive (ptid_t); |
| |
| static void get_offsets (void); |
| |
| static long read_frame (char *buf, long sizeof_buf); |
| |
| static int remote_insert_breakpoint (CORE_ADDR, char *); |
| |
| static int remote_remove_breakpoint (CORE_ADDR, char *); |
| |
| static int hexnumlen (ULONGEST num); |
| |
| static void init_remote_ops (void); |
| |
| static void init_extended_remote_ops (void); |
| |
| static void remote_stop (void); |
| |
| static int ishex (int ch, int *val); |
| |
| 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 (char *); |
| |
| static unsigned long crc32 (unsigned char *, int, unsigned int); |
| |
| 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 void remote_find_new_threads (void); |
| |
| static void record_currthread (int currthread); |
| |
| static int fromhex (int a); |
| |
| static int hex2bin (const char *hex, char *bin, int count); |
| |
| static int bin2hex (const char *bin, char *hex, int count); |
| |
| static int putpkt_binary (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 update_packet_config (struct packet_config *config); |
| |
| void _initialize_remote (void); |
| |
| /* Description of the remote protocol. Strictly speaking, when the |
| target is open()ed, remote.c should create a per-target description |
| of the remote protocol using that target's architecture. |
| Unfortunately, the target stack doesn't include local state. For |
| the moment keep the information in the target's architecture |
| object. Sigh.. */ |
| |
| 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; == DEPRECATED_REGISTER_RAW_SIZE (regnum); at present. */ |
| /* char *name; == REGISTER_NAME (regnum); at present. */ |
| }; |
| |
| struct remote_state |
| { |
| /* Description of the remote protocol registers. */ |
| long sizeof_g_packet; |
| |
| /* Description of the remote protocol registers indexed by REGNUM |
| (making an array of NUM_REGS + NUM_PSEUDO_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; |
| }; |
| |
| |
| /* Handle for retreving the remote protocol data from gdbarch. */ |
| static struct gdbarch_data *remote_gdbarch_data_handle; |
| |
| static struct remote_state * |
| get_remote_state (void) |
| { |
| return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle); |
| } |
| |
| static void * |
| init_remote_state (struct gdbarch *gdbarch) |
| { |
| int regnum; |
| struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state); |
| |
| if (DEPRECATED_REGISTER_BYTES != 0) |
| rs->sizeof_g_packet = DEPRECATED_REGISTER_BYTES; |
| else |
| rs->sizeof_g_packet = 0; |
| |
| /* Assume a 1:1 regnum<->pnum table. */ |
| rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS, |
| struct packet_reg); |
| for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| { |
| struct packet_reg *r = &rs->regs[regnum]; |
| r->pnum = regnum; |
| r->regnum = regnum; |
| r->offset = DEPRECATED_REGISTER_BYTE (regnum); |
| r->in_g_packet = (regnum < NUM_REGS); |
| /* ...name = REGISTER_NAME (regnum); */ |
| |
| /* Compute packet size by accumulating the size of all registers. */ |
| if (DEPRECATED_REGISTER_BYTES == 0) |
| rs->sizeof_g_packet += register_size (current_gdbarch, regnum); |
| } |
| |
| /* 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. */ |
| rs->remote_packet_size = 400 - 1; |
| |
| /* Should rs->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 (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2)) |
| rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32); |
| |
| /* This one is filled in when a ``g'' packet is received. */ |
| rs->actual_register_packet_size = 0; |
| |
| return rs; |
| } |
| |
| static struct packet_reg * |
| packet_reg_from_regnum (struct remote_state *rs, long regnum) |
| { |
| if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS) |
| return NULL; |
| else |
| { |
| struct packet_reg *r = &rs->regs[regnum]; |
| gdb_assert (r->regnum == regnum); |
| return r; |
| } |
| } |
| |
| static struct packet_reg * |
| packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum) |
| { |
| int i; |
| for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) |
| { |
| struct packet_reg *r = &rs->regs[i]; |
| if (r->pnum == pnum) |
| return r; |
| } |
| return NULL; |
| } |
| |
| /* FIXME: graces/2002-08-08: These variables should eventually be |
| bound to an instance of the target object (as in gdbarch-tdep()), |
| when such a thing exists. */ |
| |
| /* This is set to the data address of the access causing the target |
| to stop for a watchpoint. */ |
| static CORE_ADDR remote_watch_data_address; |
| |
| /* This is non-zero if taregt stopped for a watchpoint. */ |
| static int remote_stopped_by_watchpoint_p; |
| |
| |
| static struct target_ops remote_ops; |
| |
| static struct target_ops extended_remote_ops; |
| |
| /* Temporary target ops. Just like the remote_ops and |
| extended_remote_ops, but with asynchronous support. */ |
| static struct target_ops remote_async_ops; |
| |
| static struct target_ops extended_async_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; |
| |
| |
| /* This variable chooses whether to send a ^C or a break when the user |
| requests program interruption. Although ^C is usually what remote |
| systems expect, and that is the default here, sometimes a break is |
| preferable instead. */ |
| |
| static int remote_break; |
| |
| /* 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. */ |
| static struct serial *remote_desc = NULL; |
| |
| /* 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 int remote_address_size; |
| |
| /* Tempoary to track who currently owns the terminal. See |
| target_async_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 ((rs->remote_packet_size), |
| rs->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; |
| }; |
| |
| /* 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 (); |
| /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk |
| law?) that some hosts don't cope very well with large alloca() |
| calls. Eventually the alloca() code will be replaced by calls to |
| xmalloc() and make_cleanups() allowing this restriction to either |
| be lifted or removed. */ |
| #ifndef MAX_REMOTE_PACKET_SIZE |
| #define MAX_REMOTE_PACKET_SIZE 16384 |
| #endif |
| /* NOTE: 16 is just chosen at random. */ |
| #ifndef MIN_REMOTE_PACKET_SIZE |
| #define MIN_REMOTE_PACKET_SIZE 16 |
| #endif |
| long what_they_get; |
| if (config->fixed_p) |
| { |
| if (config->size <= 0) |
| what_they_get = MAX_REMOTE_PACKET_SIZE; |
| else |
| what_they_get = config->size; |
| } |
| else |
| { |
| what_they_get = (rs->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. */ |
| if ((rs->actual_register_packet_size) > 0 |
| && what_they_get > (rs->actual_register_packet_size)) |
| what_they_get = (rs->actual_register_packet_size); |
| } |
| if (what_they_get > MAX_REMOTE_PACKET_SIZE) |
| what_they_get = MAX_REMOTE_PACKET_SIZE; |
| if (what_they_get < MIN_REMOTE_PACKET_SIZE) |
| what_they_get = MIN_REMOTE_PACKET_SIZE; |
| 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); |
| #if 0 |
| /* Instead of explicitly capping the size of a packet to |
| MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is |
| instead allowed to set the size to something arbitrarily |
| large. */ |
| if (size > MAX_REMOTE_PACKET_SIZE) |
| error ("Invalid %s (too large).", config->name); |
| #endif |
| } |
| /* 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) |
| { |
| struct remote_state *rs = get_remote_state (); |
| 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 (rs->remote_packet_size). */ |
| if (size > (rs->remote_packet_size)) |
| size = (rs->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 |
| { |
| char *name; |
| char *title; |
| enum auto_boolean detect; |
| 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 void |
| update_packet_config (struct packet_config *config) |
| { |
| switch (config->detect) |
| { |
| case AUTO_BOOLEAN_TRUE: |
| config->support = PACKET_ENABLE; |
| break; |
| case AUTO_BOOLEAN_FALSE: |
| config->support = PACKET_DISABLE; |
| break; |
| case AUTO_BOOLEAN_AUTO: |
| config->support = PACKET_SUPPORT_UNKNOWN; |
| break; |
| } |
| } |
| |
| static void |
| show_packet_config_cmd (struct packet_config *config) |
| { |
| char *support = "internal-error"; |
| switch (config->support) |
| { |
| 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 remote protocol `%s' (%s) packet is auto-detected, currently %s.\n", |
| config->name, config->title, support); |
| break; |
| case AUTO_BOOLEAN_TRUE: |
| case AUTO_BOOLEAN_FALSE: |
| printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n", |
| config->name, config->title, support); |
| break; |
| } |
| } |
| |
| static void |
| add_packet_config_cmd (struct packet_config *config, |
| char *name, |
| char *title, |
| cmd_sfunc_ftype *set_func, |
| cmd_sfunc_ftype *show_func, |
| struct cmd_list_element **set_remote_list, |
| struct cmd_list_element **show_remote_list, |
| int legacy) |
| { |
| struct cmd_list_element *set_cmd; |
| struct cmd_list_element *show_cmd; |
| char *set_doc; |
| char *show_doc; |
| char *cmd_name; |
| config->name = name; |
| config->title = title; |
| config->detect = AUTO_BOOLEAN_AUTO; |
| config->support = PACKET_SUPPORT_UNKNOWN; |
| 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, |
| set_func, show_func, |
| set_remote_list, show_remote_list); |
| /* 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, |
| set_remote_list); |
| add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
| show_remote_list); |
| } |
| } |
| |
| static enum packet_result |
| packet_ok (const char *buf, struct packet_config *config) |
| { |
| if (buf[0] != '\0') |
| { |
| /* The stub recognized the packet request. Check that the |
| operation succeeded. */ |
| switch (config->support) |
| { |
| case 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_DISABLE: |
| internal_error (__FILE__, __LINE__, |
| "packet_ok: attempt to use a disabled packet"); |
| break; |
| case PACKET_ENABLE: |
| break; |
| } |
| if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0') |
| /* "OK" - definitly OK. */ |
| return PACKET_OK; |
| if (buf[0] == 'E' |
| && isxdigit (buf[1]) && isxdigit (buf[2]) |
| && buf[3] == '\0') |
| /* "Enn" - definitly an error. */ |
| 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. */ |
| switch (config->support) |
| { |
| case PACKET_ENABLE: |
| if (config->detect == AUTO_BOOLEAN_AUTO) |
| /* 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 |
| /* The user set it wrong. */ |
| error ("Enabled packet %s (%s) not recognized by stub", |
| config->name, config->title); |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Packet %s (%s) is NOT supported\n", |
| config->name, config->title); |
| config->support = PACKET_DISABLE; |
| break; |
| case PACKET_DISABLE: |
| break; |
| } |
| return PACKET_UNKNOWN; |
| } |
| } |
| |
| /* Should we try the 'vCont' (descriptive resume) request? */ |
| static struct packet_config remote_protocol_vcont; |
| |
| static void |
| set_remote_protocol_vcont_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_vcont); |
| } |
| |
| static void |
| show_remote_protocol_vcont_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_vcont); |
| } |
| |
| /* Should we try the 'qSymbol' (target symbol lookup service) request? */ |
| static struct packet_config remote_protocol_qSymbol; |
| |
| static void |
| set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_qSymbol); |
| } |
| |
| static void |
| show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_qSymbol); |
| } |
| |
| /* Should we try the 'P' (set register) request? */ |
| |
| static struct packet_config remote_protocol_P; |
| |
| static void |
| set_remote_protocol_P_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_P); |
| } |
| |
| static void |
| show_remote_protocol_P_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_P); |
| } |
| |
| /* 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 |
| }; |
| |
| static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES]; |
| |
| /* FIXME: Instead of having all these boiler plate functions, the |
| command callback should include a context argument. */ |
| |
| static void |
| set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); |
| } |
| |
| static void |
| show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); |
| } |
| |
| static void |
| set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); |
| } |
| |
| static void |
| show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); |
| } |
| |
| static void |
| set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]); |
| } |
| |
| static void |
| show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]); |
| } |
| |
| static void |
| set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]); |
| } |
| |
| static void |
| show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]); |
| } |
| |
| static void |
| set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); |
| } |
| |
| static void |
| show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); |
| } |
| |
| /* 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_Z[i].detect = remote_Z_packet_detect; |
| update_packet_config (&remote_protocol_Z[i]); |
| } |
| } |
| |
| static void |
| show_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++) |
| { |
| show_packet_config_cmd (&remote_protocol_Z[i]); |
| } |
| } |
| |
| /* Should we try the 'X' (remote binary download) packet? |
| |
| This variable (available to the user via "set remote X-packet") |
| dictates whether downloads are sent in binary (via the 'X' packet). |
| We assume that the stub can, and attempt to do it. This will be |
| cleared if the stub does not understand it. This switch is still |
| needed, though in cases when the packet is supported in the stub, |
| but the connection does not allow it (i.e., 7-bit serial connection |
| only). */ |
| |
| static struct packet_config remote_protocol_binary_download; |
| |
| /* 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). */ |
| |
| static int use_threadinfo_query; |
| static int use_threadextra_query; |
| |
| static void |
| set_remote_protocol_binary_download_cmd (char *args, |
| int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_binary_download); |
| } |
| |
| static void |
| show_remote_protocol_binary_download_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_binary_download); |
| } |
| |
| /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */ |
| static struct packet_config remote_protocol_qPart_auxv; |
| |
| static void |
| set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| update_packet_config (&remote_protocol_qPart_auxv); |
| } |
| |
| static void |
| show_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| show_packet_config_cmd (&remote_protocol_qPart_auxv); |
| } |
| |
| |
| /* Tokens for use by the asynchronous signal handlers for SIGINT */ |
| static void *sigint_remote_twice_token; |
| static void *sigint_remote_token; |
| |
| /* These are pointers to hook functions that may be set in order to |
| modify resume/wait behavior for a particular architecture. */ |
| |
| void (*deprecated_target_resume_hook) (void); |
| void (*deprecated_target_wait_loop_hook) (void); |
| |
| |
| |
| /* These are the threads which we last sent to the remote system. |
| -1 for all or -2 for not sent yet. */ |
| static int general_thread; |
| static int continue_thread; |
| |
| /* 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 (int currthread) |
| { |
| general_thread = currthread; |
| |
| /* 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 (pid_to_ptid (currthread))) |
| { |
| add_thread (pid_to_ptid (currthread)); |
| ui_out_text (uiout, "[New "); |
| ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread))); |
| ui_out_text (uiout, "]\n"); |
| } |
| } |
| |
| #define MAGIC_NULL_PID 42000 |
| |
| static void |
| set_thread (int th, int gen) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| int state = gen ? general_thread : continue_thread; |
| |
| if (state == th) |
| return; |
| |
| buf[0] = 'H'; |
| buf[1] = gen ? 'g' : 'c'; |
| if (th == MAGIC_NULL_PID) |
| { |
| buf[2] = '0'; |
| buf[3] = '\0'; |
| } |
| else if (th < 0) |
| sprintf (&buf[2], "-%x", -th); |
| else |
| sprintf (&buf[2], "%x", th); |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| if (gen) |
| general_thread = th; |
| else |
| continue_thread = th; |
| } |
| |
| /* Return nonzero if the thread TH is still alive on the remote system. */ |
| |
| static int |
| remote_thread_alive (ptid_t ptid) |
| { |
| int tid = PIDGET (ptid); |
| char buf[16]; |
| |
| if (tid < 0) |
| sprintf (buf, "T-%08x", -tid); |
| else |
| sprintf (buf, "T%08x", tid); |
| putpkt (buf); |
| getpkt (buf, sizeof (buf), 0); |
| return (buf[0] == 'O' && buf[1] == 'K'); |
| } |
| |
| /* 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. */ |
| |
| #define OPAQUETHREADBYTES 8 |
| |
| /* a 64 bit opaque identifier */ |
| typedef unsigned char threadref[OPAQUETHREADBYTES]; |
| |
| /* 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 |
| equivalint 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/syspended */ |
| 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) |
| |
| char *unpack_varlen_hex (char *buff, ULONGEST *result); |
| |
| static char *unpack_nibble (char *buf, int *val); |
| |
| static char *pack_nibble (char *buf, int nibble); |
| |
| static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte); |
| |
| 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); |
| |
| /* encode 64 bits in 16 chars of hex */ |
| |
| static const char hexchars[] = "0123456789abcdef"; |
| |
| static int |
| ishex (int ch, int *val) |
| { |
| if ((ch >= 'a') && (ch <= 'f')) |
| { |
| *val = ch - 'a' + 10; |
| return 1; |
| } |
| if ((ch >= 'A') && (ch <= 'F')) |
| { |
| *val = ch - 'A' + 10; |
| return 1; |
| } |
| if ((ch >= '0') && (ch <= '9')) |
| { |
| *val = ch - '0'; |
| return 1; |
| } |
| return 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; |
| } |
| |
| char * |
| unpack_varlen_hex (char *buff, /* packet to parse */ |
| ULONGEST *result) |
| { |
| int nibble; |
| int retval = 0; |
| |
| while (ishex (*buff, &nibble)) |
| { |
| buff++; |
| retval = retval << 4; |
| retval |= nibble & 0x0f; |
| } |
| *result = retval; |
| return buff; |
| } |
| |
| static char * |
| unpack_nibble (char *buf, int *val) |
| { |
| ishex (*buf++, val); |
| return buf; |
| } |
| |
| static char * |
| pack_nibble (char *buf, int nibble) |
| { |
| *buf++ = hexchars[(nibble & 0x0f)]; |
| return buf; |
| } |
| |
| static char * |
| pack_hex_byte (char *pkt, int byte) |
| { |
| *pkt++ = hexchars[(byte >> 4) & 0xf]; |
| *pkt++ = hexchars[(byte & 0xf)]; |
| return pkt; |
| } |
| |
| 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 = (char *) 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; |
| unsigned int tag; |
| threadref ref; |
| char *limit = pkt + (rs->remote_packet_size); /* plausable 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\n"); |
| if (!threadmatch (&ref, expectedref)) |
| { /* This is an answer to a different request */ |
| warning ("ERROR RMT Thread info mismatch\n"); |
| return 0; |
| } |
| copy_threadref (&info->threadid, &ref); |
| |
| /* Loop on tagged fields , try to bail if somthing goes wrong */ |
| |
| while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */ |
| { |
| 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\n"); |
| retval = 0; |
| break; |
| } |
| if (tag == TAG_THREADID) |
| { |
| if (length != 16) |
| { |
| warning ("ERROR RMT: length of threadid is not 16\n"); |
| 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\n"); |
| 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\n"); |
| 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; |
| char *threadinfo_pkt = alloca (rs->remote_packet_size); |
| |
| pack_threadinfo_request (threadinfo_pkt, fieldset, threadid); |
| putpkt (threadinfo_pkt); |
| getpkt (threadinfo_pkt, (rs->remote_packet_size), 0); |
| result = remote_unpack_thread_info_response (threadinfo_pkt + 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->remote_packet_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; |
| } |
| |
| 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 (); |
| static threadref echo_nextthread; |
| char *threadlist_packet = alloca (rs->remote_packet_size); |
| char *t_response = alloca (rs->remote_packet_size); |
| int result = 1; |
| |
| /* Trancate result limit to be smaller than the packet size */ |
| if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size)) |
| result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2; |
| |
| pack_threadlist_request (threadlist_packet, |
| startflag, result_limit, nextthread); |
| putpkt (threadlist_packet); |
| getpkt (t_response, (rs->remote_packet_size), 0); |
| |
| *result_count = |
| parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread, |
| threadlist, done); |
| |
| if (!threadmatch (&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\n"); |
| return 0; /* I choose simply exiting */ |
| } |
| if (*result_count <= 0) |
| { |
| if (*done != 1) |
| { |
| warning ("RMT ERROR : failed to get remote thread list\n"); |
| result = 0; |
| } |
| return result; /* break; */ |
| } |
| if (*result_count > result_limit) |
| { |
| *result_count = 0; |
| warning ("RMT ERROR: threadlist response longer than requested\n"); |
| return 0; |
| } |
| return result; |
| } |
| |
| /* This is the interface between remote and threads, remotes upper interface */ |
| |
| /* remote_find_new_threads retrieves the thread list and for each |
| thread in the list, looks up the thread in GDB's internal list, |
| ading the thread if it does not already exist. This involves |
| getting partial thread lists from the remote target so, polling the |
| quit_flag is required. */ |
| |
| |
| /* About this many threadisds fit in a packet. */ |
| |
| #define MAXTHREADLISTRESULTS 32 |
| |
| static int |
| remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, |
| int looplimit) |
| { |
| int done, i, result_count; |
| int startflag = 1; |
| int result = 1; |
| int loopcount = 0; |
| static threadref nextthread; |
| static threadref resultthreadlist[MAXTHREADLISTRESULTS]; |
| |
| done = 0; |
| while (!done) |
| { |
| if (loopcount++ > looplimit) |
| { |
| result = 0; |
| warning ("Remote fetch threadlist -infinite loop-\n"); |
| break; |
| } |
| if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS, |
| &done, &result_count, resultthreadlist)) |
| { |
| 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 (&nextthread, &resultthreadlist[result_count - 1]); |
| i = 0; |
| while (result_count--) |
| if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) |
| break; |
| } |
| return result; |
| } |
| |
| static int |
| remote_newthread_step (threadref *ref, void *context) |
| { |
| ptid_t ptid; |
| |
| ptid = pid_to_ptid (threadref_to_int (ref)); |
| |
| if (!in_thread_list (ptid)) |
| add_thread (ptid); |
| 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 (); |
| char *buf = alloca (rs->remote_packet_size); |
| |
| putpkt ("qC"); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| if (buf[0] == 'Q' && buf[1] == 'C') |
| return pid_to_ptid (strtol (&buf[2], NULL, 16)); |
| else |
| return oldpid; |
| } |
| |
| /* Find new threads for info threads command. |
| * Original version, using John Metzler's thread protocol. |
| */ |
| |
| static void |
| remote_find_new_threads (void) |
| { |
| remote_threadlist_iterator (remote_newthread_step, 0, |
| CRAZY_MAX_THREADS); |
| if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */ |
| inferior_ptid = remote_current_thread (inferior_ptid); |
| } |
| |
| /* |
| * Find all threads for info threads command. |
| * Uses new thread protocol contributed by Cisco. |
| * Falls back and attempts to use the older method (above) |
| * if the target doesn't respond to the new method. |
| */ |
| |
| static void |
| remote_threads_info (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| char *bufp; |
| int tid; |
| |
| if (remote_desc == 0) /* paranoia */ |
| error ("Command can only be used when connected to the remote target."); |
| |
| if (use_threadinfo_query) |
| { |
| putpkt ("qfThreadInfo"); |
| bufp = buf; |
| getpkt (bufp, (rs->remote_packet_size), 0); |
| if (bufp[0] != '\0') /* q packet recognized */ |
| { |
| while (*bufp++ == 'm') /* reply contains one or more TID */ |
| { |
| do |
| { |
| tid = strtol (bufp, &bufp, 16); |
| if (tid != 0 && !in_thread_list (pid_to_ptid (tid))) |
| add_thread (pid_to_ptid (tid)); |
| } |
| while (*bufp++ == ','); /* comma-separated list */ |
| putpkt ("qsThreadInfo"); |
| bufp = buf; |
| getpkt (bufp, (rs->remote_packet_size), 0); |
| } |
| return; /* done */ |
| } |
| } |
| |
| /* Else fall back to old method based on jmetzler protocol. */ |
| use_threadinfo_query = 0; |
| remote_find_new_threads (); |
| return; |
| } |
| |
| /* |
| * 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 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... */ |
| char *bufp = alloca (rs->remote_packet_size); |
| int n = 0; /* position in display_buf */ |
| |
| if (remote_desc == 0) /* paranoia */ |
| internal_error (__FILE__, __LINE__, |
| "remote_threads_extra_info"); |
| |
| if (use_threadextra_query) |
| { |
| sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid)); |
| putpkt (bufp); |
| getpkt (bufp, (rs->remote_packet_size), 0); |
| if (bufp[0] != 0) |
| { |
| n = min (strlen (bufp) / 2, sizeof (display_buf)); |
| result = hex2bin (bufp, display_buf, n); |
| display_buf [result] = '\0'; |
| return display_buf; |
| } |
| } |
| |
| /* If the above query fails, fall back to the old method. */ |
| use_threadextra_query = 0; |
| set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME |
| | TAG_MOREDISPLAY | TAG_DISPLAY; |
| int_to_threadref (&id, PIDGET (tp->ptid)); |
| if (remote_get_threadinfo (&id, set, &threadinfo)) |
| if (threadinfo.active) |
| { |
| if (*threadinfo.shortname) |
| n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname); |
| if (*threadinfo.display) |
| n += sprintf(&display_buf[n], " State: %s,", threadinfo.display); |
| if (*threadinfo.more_display) |
| n += sprintf(&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; |
| } |
| |
| |
| |
| /* Restart the remote side; this is an extended protocol operation. */ |
| |
| static void |
| extended_remote_restart (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| |
| /* Send the restart command; for reasons I don't understand the |
| remote side really expects a number after the "R". */ |
| buf[0] = 'R'; |
| sprintf (&buf[1], "%x", 0); |
| putpkt (buf); |
| |
| /* Now query for status so this looks just like we restarted |
| gdbserver from scratch. */ |
| putpkt ("?"); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| } |
| |
| /* Clean up connection to a remote debugger. */ |
| |
| static void |
| remote_close (int quitting) |
| { |
| if (remote_desc) |
| serial_close (remote_desc); |
| remote_desc = NULL; |
| } |
| |
| /* 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 = alloca (rs->remote_packet_size); |
| char *ptr; |
| int lose; |
| CORE_ADDR text_addr, data_addr, bss_addr; |
| struct section_offsets *offs; |
| |
| putpkt ("qOffsets"); |
| |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| 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 (strncmp (ptr, "Text=", 5) == 0) |
| { |
| ptr += 5; |
| /* Don't use strtol, could lose on big values. */ |
| while (*ptr && *ptr != ';') |
| text_addr = (text_addr << 4) + fromhex (*ptr++); |
| } |
| else |
| lose = 1; |
| |
| if (!lose && strncmp (ptr, ";Data=", 6) == 0) |
| { |
| ptr += 6; |
| while (*ptr && *ptr != ';') |
| data_addr = (data_addr << 4) + fromhex (*ptr++); |
| } |
| else |
| lose = 1; |
| |
| if (!lose && strncmp (ptr, ";Bss=", 5) == 0) |
| { |
| ptr += 5; |
| while (*ptr && *ptr != ';') |
| bss_addr = (bss_addr << 4) + fromhex (*ptr++); |
| } |
| else |
| lose = 1; |
| |
| if (lose) |
| error ("Malformed response to offset query, %s", buf); |
| |
| if (symfile_objfile == NULL) |
| return; |
| |
| 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)); |
| |
| 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); |
| } |
| |
| /* Stub for catch_errors. */ |
| |
| static int |
| remote_start_remote_dummy (struct ui_out *uiout, void *dummy) |
| { |
| start_remote (); /* Initialize gdb process mechanisms */ |
| /* NOTE: Return something >=0. A -ve value is reserved for |
| catch_exceptions. */ |
| return 1; |
| } |
| |
| static int |
| remote_start_remote (struct ui_out *uiout, void *dummy) |
| { |
| immediate_quit++; /* Allow user to interrupt it */ |
| |
| /* Ack any packet which the remote side has already sent. */ |
| serial_write (remote_desc, "+", 1); |
| |
| /* Let the stub know that we want it to return the thread. */ |
| set_thread (-1, 0); |
| |
| inferior_ptid = remote_current_thread (inferior_ptid); |
| |
| get_offsets (); /* Get text, data & bss offsets */ |
| |
| putpkt ("?"); /* initiate a query from remote machine */ |
| immediate_quit--; |
| |
| /* NOTE: See comment above in remote_start_remote_dummy(). This |
| function returns something >=0. */ |
| return remote_start_remote_dummy (uiout, dummy); |
| } |
| |
| /* Open a connection to a remote debugger. |
| NAME is the filename used for communication. */ |
| |
| static void |
| remote_open (char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &remote_ops, 0, 0); |
| } |
| |
| /* Just like remote_open, but with asynchronous support. */ |
| static void |
| remote_async_open (char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &remote_async_ops, 0, 1); |
| } |
| |
| /* 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 (char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */, |
| 0 /* async_p */); |
| } |
| |
| /* Just like extended_remote_open, but with asynchronous support. */ |
| static void |
| extended_remote_async_open (char *name, int from_tty) |
| { |
| remote_open_1 (name, from_tty, &extended_async_remote_ops, |
| 1 /*extended_p */, 1 /* async_p */); |
| } |
| |
| /* Generic code for opening a connection to a remote target. */ |
| |
| static void |
| init_all_packet_configs (void) |
| { |
| int i; |
| update_packet_config (&remote_protocol_P); |
| update_packet_config (&remote_protocol_qSymbol); |
| update_packet_config (&remote_protocol_vcont); |
| for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
| update_packet_config (&remote_protocol_Z[i]); |
| /* Force remote_write_bytes to check whether target supports binary |
| downloading. */ |
| update_packet_config (&remote_protocol_binary_download); |
| update_packet_config (&remote_protocol_qPart_auxv); |
| } |
| |
| /* Symbol look-up. */ |
| |
| static void |
| remote_check_symbols (struct objfile *objfile) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *msg, *reply, *tmp; |
| struct minimal_symbol *sym; |
| int end; |
| |
| if (remote_protocol_qSymbol.support == PACKET_DISABLE) |
| return; |
| |
| msg = alloca (rs->remote_packet_size); |
| reply = alloca (rs->remote_packet_size); |
| |
| /* Invite target to request symbol lookups. */ |
| |
| putpkt ("qSymbol::"); |
| getpkt (reply, (rs->remote_packet_size), 0); |
| packet_ok (reply, &remote_protocol_qSymbol); |
| |
| while (strncmp (reply, "qSymbol:", 8) == 0) |
| { |
| tmp = &reply[8]; |
| end = hex2bin (tmp, msg, strlen (tmp) / 2); |
| msg[end] = '\0'; |
| sym = lookup_minimal_symbol (msg, NULL, NULL); |
| if (sym == NULL) |
| sprintf (msg, "qSymbol::%s", &reply[8]); |
| else |
| sprintf (msg, "qSymbol:%s:%s", |
| paddr_nz (SYMBOL_VALUE_ADDRESS (sym)), |
| &reply[8]); |
| putpkt (msg); |
| getpkt (reply, (rs->remote_packet_size), 0); |
| } |
| } |
| |
| static struct serial * |
| remote_serial_open (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 && strncmp (name, "udp:", 4) == 0) |
| { |
| warning ("The remote protocol may be unreliable over UDP."); |
| warning ("Some events may be lost, rendering further debugging " |
| "impossible."); |
| udp_warning = 1; |
| } |
| |
| return serial_open (name); |
| } |
| |
| static void |
| remote_open_1 (char *name, int from_tty, struct target_ops *target, |
| int extended_p, int async_p) |
| { |
| int ex; |
| 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 (!async_p) |
| wait_forever_enabled_p = 1; |
| |
| reopen_exec_file (); |
| reread_symbols (); |
| |
| target_preopen (from_tty); |
| |
| unpush_target (target); |
| |
| remote_desc = remote_serial_open (name); |
| if (!remote_desc) |
| perror_with_name (name); |
| |
| if (baud_rate != -1) |
| { |
| if (serial_setbaudrate (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 (remote_desc); |
| remote_desc = NULL; |
| perror_with_name (name); |
| } |
| } |
| |
| serial_raw (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 (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 */ |
| |
| init_all_packet_configs (); |
| |
| general_thread = -2; |
| continue_thread = -2; |
| |
| /* Probe for ability to use "ThreadInfo" query, as required. */ |
| use_threadinfo_query = 1; |
| use_threadextra_query = 1; |
| |
| /* 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. These functions should |
| be split out into seperate variables, especially since GDB will |
| someday have a notion of debugging several processes. */ |
| |
| inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); |
| |
| if (async_p) |
| { |
| /* 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; |
| } |
| |
| #ifdef SOLIB_CREATE_INFERIOR_HOOK |
| /* First delete any symbols previously loaded from shared libraries. */ |
| no_shared_libraries (NULL, 0); |
| #endif |
| |
| /* 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. */ |
| ex = catch_exceptions (uiout, |
| remote_start_remote, NULL, |
| "Couldn't establish connection to remote" |
| " target\n", |
| RETURN_MASK_ALL); |
| if (ex < 0) |
| { |
| pop_target (); |
| if (async_p) |
| wait_forever_enabled_p = 1; |
| throw_exception (ex); |
| } |
| |
| if (async_p) |
| wait_forever_enabled_p = 1; |
| |
| if (extended_p) |
| { |
| /* Tell the remote that we are using the extended protocol. */ |
| char *buf = alloca (rs->remote_packet_size); |
| putpkt ("!"); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| } |
| #ifdef SOLIB_CREATE_INFERIOR_HOOK |
| /* FIXME: need a master target_open vector from which all |
| remote_opens can be called, so that stuff like this can |
| go there. Failing that, the following code must be copied |
| to the open function for any remote target that wants to |
| support svr4 shared libraries. */ |
| |
| /* Set up to detect and load shared libraries. */ |
| if (exec_bfd) /* No use without an exec file. */ |
| { |
| SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); |
| remote_check_symbols (symfile_objfile); |
| } |
| #endif |
| } |
| |
| /* This takes a program previously attached to and detaches it. 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 (char *args, int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| |
| if (args) |
| error ("Argument given to \"detach\" when remotely debugging."); |
| |
| /* Tell the remote target to detach. */ |
| strcpy (buf, "D"); |
| remote_send (buf, (rs->remote_packet_size)); |
| |
| /* Unregister the file descriptor from the event loop. */ |
| if (target_is_async_p ()) |
| serial_async (remote_desc, NULL, 0); |
| |
| target_mourn_inferior (); |
| if (from_tty) |
| puts_filtered ("Ending remote debugging.\n"); |
| } |
| |
| /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ |
| |
| static void |
| remote_disconnect (char *args, int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| |
| if (args) |
| error ("Argument given to \"detach\" when remotely debugging."); |
| |
| /* Unregister the file descriptor from the event loop. */ |
| if (target_is_async_p ()) |
| serial_async (remote_desc, NULL, 0); |
| |
| target_mourn_inferior (); |
| if (from_tty) |
| puts_filtered ("Ending remote debugging.\n"); |
| } |
| |
| /* Convert hex digit A to a number. */ |
| |
| static int |
| fromhex (int a) |
| { |
| if (a >= '0' && a <= '9') |
| return a - '0'; |
| else if (a >= 'a' && a <= 'f') |
| return a - 'a' + 10; |
| else if (a >= 'A' && a <= 'F') |
| return a - 'A' + 10; |
| else |
| error ("Reply contains invalid hex digit %d", a); |
| } |
| |
| static int |
| hex2bin (const char *hex, char *bin, int count) |
| { |
| int i; |
| |
| for (i = 0; i < count; i++) |
| { |
| if (hex[0] == 0 || hex[1] == 0) |
| { |
| /* Hex string is short, or of uneven length. |
| Return the count that has been converted so far. */ |
| return i; |
| } |
| *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
| hex += 2; |
| } |
| return i; |
| } |
| |
| /* Convert number NIB to a hex digit. */ |
| |
| static int |
| tohex (int nib) |
| { |
| if (nib < 10) |
| return '0' + nib; |
| else |
| return 'a' + nib - 10; |
| } |
| |
| static int |
| bin2hex (const char *bin, char *hex, int count) |
| { |
| int i; |
| /* May use a length, or a nul-terminated string as input. */ |
| if (count == 0) |
| count = strlen (bin); |
| |
| for (i = 0; i < count; i++) |
| { |
| *hex++ = tohex ((*bin >> 4) & 0xf); |
| *hex++ = tohex (*bin++ & 0xf); |
| } |
| *hex = 0; |
| return i; |
| } |
| |
| /* 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 (buf, "vCont?"); |
| putpkt (buf); |
| getpkt (buf, rs->remote_packet_size, 0); |
| |
| /* Make sure that the features we assume are supported. */ |
| if (strncmp (buf, "vCont", 5) == 0) |
| { |
| char *p = &buf[5]; |
| int support_s, support_S, support_c, support_C; |
| |
| support_s = 0; |
| support_S = 0; |
| support_c = 0; |
| support_C = 0; |
| while (p && *p == ';') |
| { |
| p++; |
| if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| support_s = 1; |
| else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) |
| support_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; |
| |
| p = strchr (p, ';'); |
| } |
| |
| /* If s, S, c, and C are not all supported, we can't use vCont. Clearing |
| BUF will make packet_ok disable the packet. */ |
| if (!support_s || !support_S || !support_c || !support_C) |
| buf[0] = 0; |
| } |
| |
| packet_ok (buf, &remote_protocol_vcont); |
| } |
| |
| /* 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's |
| PID is -1, 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 target_signal siggnal) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int pid = PIDGET (ptid); |
| char *buf = NULL, *outbuf; |
| struct cleanup *old_cleanup; |
| |
| buf = xmalloc (rs->remote_packet_size); |
| old_cleanup = make_cleanup (xfree, buf); |
| |
| if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN) |
| remote_vcont_probe (rs, buf); |
| |
| if (remote_protocol_vcont.support == PACKET_DISABLE) |
| { |
| do_cleanups (old_cleanup); |
| return 0; |
| } |
| |
| /* 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? */ |
| |
| if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) |
| { |
| /* MAGIC_NULL_PTID means that we don't have any active threads, so we |
| don't have any PID numbers the inferior will understand. Make sure |
| to only send forms that do not specify a PID. */ |
| if (step && siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;S%02x", siggnal); |
| else if (step) |
| outbuf = xstrprintf ("vCont;s"); |
| else if (siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;C%02x", siggnal); |
| else |
| outbuf = xstrprintf ("vCont;c"); |
| } |
| else if (pid == -1) |
| { |
| /* Resume all threads, with preference for INFERIOR_PTID. */ |
| if (step && siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal, |
| PIDGET (inferior_ptid)); |
| else if (step) |
| outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid)); |
| else if (siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal, |
| PIDGET (inferior_ptid)); |
| else |
| outbuf = xstrprintf ("vCont;c"); |
| } |
| else |
| { |
| /* Scheduler locking; resume only PTID. */ |
| if (step && siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid); |
| else if (step) |
| outbuf = xstrprintf ("vCont;s:%x", pid); |
| else if (siggnal != TARGET_SIGNAL_0) |
| outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid); |
| else |
| outbuf = xstrprintf ("vCont;c:%x", pid); |
| } |
| |
| gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size); |
| make_cleanup (xfree, outbuf); |
| |
| putpkt (outbuf); |
| |
| do_cleanups (old_cleanup); |
| |
| return 1; |
| } |
| |
| /* Tell the remote machine to resume. */ |
| |
| static enum target_signal last_sent_signal = TARGET_SIGNAL_0; |
| |
| static int last_sent_step; |
| |
| static void |
| remote_resume (ptid_t ptid, int step, enum target_signal siggnal) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| int pid = PIDGET (ptid); |
| char *p; |
| |
| last_sent_signal = siggnal; |
| last_sent_step = step; |
| |
| /* A hook for when we need to do something at the last moment before |
| resumption. */ |
| if (deprecated_target_resume_hook) |
| (*deprecated_target_resume_hook) (); |
| |
| /* The vCont packet doesn't need to specify threads via Hc. */ |
| if (remote_vcont_resume (ptid, step, siggnal)) |
| return; |
| |
| /* All other supported resume packets do use Hc, so call set_thread. */ |
| if (pid == -1) |
| set_thread (0, 0); /* run any thread */ |
| else |
| set_thread (pid, 0); /* run this thread */ |
| |
| if (siggnal != TARGET_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); |
| } |
| |
| /* Same as remote_resume, but with async support. */ |
| static void |
| remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal) |
| { |
| remote_resume (ptid, step, siggnal); |
| |
| /* 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 (event_loop_p && target_can_async_p ()) |
| target_async (inferior_event_handler, 0); |
| /* Tell the world that the target is now executing. */ |
| /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set |
| this? Instead, should the client of target just assume (for |
| async targets) that the target is going to start executing? Is |
| this information already found in the continuation block? */ |
| if (target_is_async_p ()) |
| target_executing = 1; |
| } |
| |
| |
| /* Set up the signal handler for SIGINT, while the target is |
| executing, ovewriting the 'regular' SIGINT signal handler. */ |
| static void |
| initialize_sigint_signal_handler (void) |
| { |
| sigint_remote_token = |
| create_async_signal_handler (async_remote_interrupt, NULL); |
| signal (SIGINT, handle_remote_sigint); |
| } |
| |
| /* Signal handler for SIGINT, while the target is executing. */ |
| static void |
| handle_remote_sigint (int sig) |
| { |
| signal (sig, handle_remote_sigint_twice); |
| sigint_remote_twice_token = |
| create_async_signal_handler (async_remote_interrupt_twice, NULL); |
| mark_async_signal_handler_wrapper (sigint_remote_token); |
| } |
| |
| /* 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 |
| handle_remote_sigint_twice (int sig) |
| { |
| signal (sig, handle_sigint); |
| sigint_remote_twice_token = |
| create_async_signal_handler (inferior_event_handler_wrapper, NULL); |
| mark_async_signal_handler_wrapper (sigint_remote_twice_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, "remote_interrupt called\n"); |
| |
| target_stop (); |
| } |
| |
| /* Perform interrupt, if the first attempt did not succeed. Just give |
| up on the target alltogether. */ |
| void |
| async_remote_interrupt_twice (gdb_client_data arg) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); |
| /* Do something only if the target was not killed by the previous |
| cntl-C. */ |
| if (target_executing) |
| { |
| interrupt_query (); |
| signal (SIGINT, handle_remote_sigint); |
| } |
| } |
| |
| /* Reinstall the usual SIGINT handlers, after the target has |
| stopped. */ |
| static void |
| cleanup_sigint_signal_handler (void *dummy) |
| { |
| signal (SIGINT, handle_sigint); |
| if (sigint_remote_twice_token) |
| delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token); |
| if (sigint_remote_token) |
| delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token); |
| } |
| |
| /* Send ^C to target to halt it. Target will respond, and send us a |
| packet. */ |
| static void (*ofunc) (int); |
| |
| /* The command line interface's stop routine. This function is installed |
| as a signal handler for SIGINT. The first time a user requests a |
| stop, we call remote_stop 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 |
| remote_interrupt (int signo) |
| { |
| /* If this doesn't work, try more severe steps. */ |
| signal (signo, remote_interrupt_twice); |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
| |
| target_stop (); |
| } |
| |
| /* The user typed ^C twice. */ |
| |
| static void |
| remote_interrupt_twice (int signo) |
| { |
| signal (signo, ofunc); |
| interrupt_query (); |
| signal (signo, remote_interrupt); |
| } |
| |
| /* This is the generic stop called via the target vector. When a target |
| interrupt is requested, either by the command line or the GUI, we |
| will eventually end up here. */ |
| static void |
| remote_stop (void) |
| { |
| /* Send a break or a ^C, depending on user preference. */ |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
| |
| if (remote_break) |
| serial_send_break (remote_desc); |
| else |
| serial_write (remote_desc, "\003", 1); |
| } |
| |
| /* Ask the user what to do when an interrupt is received. */ |
| |
| static void |
| interrupt_query (void) |
| { |
| target_terminal_ours (); |
| |
| if (query ("Interrupted while waiting for the program.\n\ |
| Give up (and stop debugging it)? ")) |
| { |
| target_mourn_inferior (); |
| throw_exception (RETURN_QUIT); |
| } |
| |
| target_terminal_inferior (); |
| } |
| |
| /* 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_async_terminal_inferior (void) |
| { |
| /* FIXME: cagney/1999-09-27: Shouldn't need to test for |
| sync_execution here. This function should only be called when |
| GDB is resuming the inferior in the forground. A background |
| resume (``run&'') should leave GDB in control of the terminal and |
| consequently should not call this code. */ |
| if (!sync_execution) |
| return; |
| /* FIXME: cagney/1999-09-27: Closely related to the above. Make |
| calls target_terminal_*() idenpotent. 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; |
| 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_async_terminal_ours (void) |
| { |
| /* See FIXME in remote_async_terminal_inferior. */ |
| if (!sync_execution) |
| return; |
| /* See FIXME in remote_async_terminal_inferior. */ |
| if (remote_async_terminal_ours_p) |
| return; |
| cleanup_sigint_signal_handler (NULL); |
| add_file_handler (input_fd, stdin_event_handler, 0); |
| remote_async_terminal_ours_p = 1; |
| } |
| |
| /* If nonzero, ignore the next kill. */ |
| |
| int kill_kludge; |
| |
| 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); |
| } |
| |
| /* Wait until the remote machine stops, then return, |
| storing status in STATUS just as `wait' would. |
| Returns "pid", which in the case of a multi-threaded |
| remote OS, is the thread-id. */ |
| |
| static ptid_t |
| remote_wait (ptid_t ptid, struct target_waitstatus *status) |
| { |
| struct remote_state *rs = get_remote_state (); |
| unsigned char *buf = alloca (rs->remote_packet_size); |
| ULONGEST thread_num = -1; |
| ULONGEST addr; |
| |
| status->kind = TARGET_WAITKIND_EXITED; |
| status->value.integer = 0; |
| |
| while (1) |
| { |
| unsigned char *p; |
| |
| ofunc = signal (SIGINT, remote_interrupt); |
| getpkt (buf, (rs->remote_packet_size), 1); |
| signal (SIGINT, ofunc); |
| |
| /* This is a hook for when we need to do something (perhaps the |
| collection of trace data) every time the target stops. */ |
| if (deprecated_target_wait_loop_hook) |
| (*deprecated_target_wait_loop_hook) (); |
| |
| remote_stopped_by_watchpoint_p = 0; |
| |
| switch (buf[0]) |
| { |
| case 'E': /* Error of some sort */ |
| warning ("Remote failure reply: %s", buf); |
| continue; |
| case 'F': /* File-I/O request */ |
| remote_fileio_request (buf); |
| continue; |
| case 'T': /* Status with PC, SP, FP, ... */ |
| { |
| int i; |
| char regs[MAX_REGISTER_SIZE]; |
| |
| /* 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) |
| { |
| unsigned char *p1; |
| char *p_temp; |
| int fieldsize; |
| LONGEST pnum = 0; |
| |
| /* If the packet contains a register number save it in pnum |
| and set p1 to point to the character following it. |
| Otherwise p1 points to p. */ |
| |
| /* If this packet is an awatch packet, don't parse the 'a' |
| as a register number. */ |
| |
| if (strncmp (p, "awatch", strlen("awatch")) != 0) |
| { |
| /* Read the ``P'' register number. */ |
| pnum = strtol (p, &p_temp, 16); |
| p1 = (unsigned char *) p_temp; |
| } |
| else |
| p1 = p; |
| |
| if (p1 == p) /* No register number present here */ |
| { |
| p1 = (unsigned char *) strchr (p, ':'); |
| if (p1 == NULL) |
| warning ("Malformed packet(a) (missing colon): %s\n\ |
| Packet: '%s'\n", |
| p, buf); |
| if (strncmp (p, "thread", p1 - p) == 0) |
| { |
| p_temp = unpack_varlen_hex (++p1, &thread_num); |
| record_currthread (thread_num); |
| p = (unsigned char *) p_temp; |
| } |
| else if ((strncmp (p, "watch", p1 - p) == 0) |
| || (strncmp (p, "rwatch", p1 - p) == 0) |
| || (strncmp (p, "awatch", p1 - p) == 0)) |
| { |
| remote_stopped_by_watchpoint_p = 1; |
| p = unpack_varlen_hex (++p1, &addr); |
| remote_watch_data_address = (CORE_ADDR)addr; |
| } |
| else |
| { |
| /* Silently skip unknown optional info. */ |
| p_temp = strchr (p1 + 1, ';'); |
| if (p_temp) |
| p = (unsigned char *) p_temp; |
| } |
| } |
| else |
| { |
| struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); |
| p = p1; |
| |
| if (*p++ != ':') |
| error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n", |
| p, buf); |
| |
| if (reg == NULL) |
| error ("Remote sent bad register number %s: %s\nPacket: '%s'\n", |
| phex_nz (pnum, 0), p, buf); |
| |
| fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum)); |
| p += 2 * fieldsize; |
| if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum)) |
| warning ("Remote reply is too short: %s", buf); |
| supply_register (reg->regnum, regs); |
| } |
| |
| if (*p++ != ';') |
| error ("Remote register badly formatted: %s\nhere: %s", buf, p); |
| } |
| } |
| /* fall through */ |
| case 'S': /* Old style status, just signal only */ |
| status->kind = TARGET_WAITKIND_STOPPED; |
| status->value.sig = (enum target_signal) |
| (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
| |
| if (buf[3] == 'p') |
| { |
| thread_num = strtol ((const char *) &buf[4], NULL, 16); |
| record_currthread (thread_num); |
| } |
| goto got_status; |
| case 'W': /* Target exited */ |
| { |
| /* The remote process exited. */ |
| status->kind = TARGET_WAITKIND_EXITED; |
| status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
| goto got_status; |
| } |
| case 'X': |
| status->kind = TARGET_WAITKIND_SIGNALLED; |
| status->value.sig = (enum target_signal) |
| (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
| kill_kludge = 1; |
| |
| goto got_status; |
| case 'O': /* Console output */ |
| remote_console_output (buf + 1); |
| continue; |
| case '\0': |
| if (last_sent_signal != TARGET_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", |
| target_signal_to_name (last_sent_signal)); |
| last_sent_signal = TARGET_SIGNAL_0; |
| target_terminal_inferior (); |
| |
| strcpy ((char *) buf, last_sent_step ? "s" : "c"); |
| putpkt ((char *) buf); |
| continue; |
| } |
| /* else fallthrough */ |
| default: |
| warning ("Invalid remote reply: %s", buf); |
| continue; |
| } |
| } |
| got_status: |
| if (thread_num != -1) |
| { |
| return pid_to_ptid (thread_num); |
| } |
| return inferior_ptid; |
| } |
| |
| /* Async version of remote_wait. */ |
| static ptid_t |
| remote_async_wait (ptid_t ptid, struct target_waitstatus *status) |
| { |
| struct remote_state *rs = get_remote_state (); |
| unsigned char *buf = alloca (rs->remote_packet_size); |
| ULONGEST thread_num = -1; |
| ULONGEST addr; |
| |
| status->kind = TARGET_WAITKIND_EXITED; |
| status->value.integer = 0; |
| |
| remote_stopped_by_watchpoint_p = 0; |
| |
| while (1) |
| { |
| unsigned char *p; |
| |
| if (!target_is_async_p ()) |
| ofunc = signal (SIGINT, remote_interrupt); |
| /* 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. */ |
| getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p); |
| if (!target_is_async_p ()) |
| signal (SIGINT, ofunc); |
| |
| /* This is a hook for when we need to do something (perhaps the |
| collection of trace data) every time the target stops. */ |
| if (deprecated_target_wait_loop_hook) |
| (*deprecated_target_wait_loop_hook) (); |
| |
| switch (buf[0]) |
| { |
| case 'E': /* Error of some sort */ |
| warning ("Remote failure reply: %s", buf); |
| continue; |
| case 'F': /* File-I/O request */ |
| remote_fileio_request (buf); |
| continue; |
| case 'T': /* Status with PC, SP, FP, ... */ |
| { |
| int i; |
| char regs[MAX_REGISTER_SIZE]; |
| |
| /* 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) |
| { |
| unsigned char *p1; |
| char *p_temp; |
| int fieldsize; |
| long pnum = 0; |
| |
| /* If the packet contains a register number, save it in pnum |
| and set p1 to point to the character following it. |
| Otherwise p1 points to p. */ |
| |
| /* If this packet is an awatch packet, don't parse the 'a' |
| as a register number. */ |
| |
| if (!strncmp (p, "awatch", strlen ("awatch")) != 0) |
| { |
| /* Read the register number. */ |
| pnum = strtol (p, &p_temp, 16); |
| p1 = (unsigned char *) p_temp; |
| } |
| else |
| p1 = p; |
| |
| if (p1 == p) /* No register number present here */ |
| { |
| p1 = (unsigned char *) strchr (p, ':'); |
| if (p1 == NULL) |
| error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n", |
| p, buf); |
| if (strncmp (p, "thread", p1 - p) == 0) |
| { |
| p_temp = unpack_varlen_hex (++p1, &thread_num); |
| record_currthread (thread_num); |
| p = (unsigned char *) p_temp; |
| } |
| else if ((strncmp (p, "watch", p1 - p) == 0) |
| || (strncmp (p, "rwatch", p1 - p) == 0) |
| || (strncmp (p, "awatch", p1 - p) == 0)) |
| { |
| remote_stopped_by_watchpoint_p = 1; |
| p = unpack_varlen_hex (++p1, &addr); |
| remote_watch_data_address = (CORE_ADDR)addr; |
| } |
| else |
| { |
| /* Silently skip unknown optional info. */ |
| p_temp = (unsigned char *) strchr (p1 + 1, ';'); |
| if (p_temp) |
| p = p_temp; |
| } |
| } |
| |
| else |
| { |
| struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); |
| p = p1; |
| if (*p++ != ':') |
| error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n", |
| p, buf); |
| |
| if (reg == NULL) |
| error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n", |
| pnum, p, buf); |
| |
| fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum)); |
| p += 2 * fieldsize; |
| if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum)) |
| warning ("Remote reply is too short: %s", buf); |
| supply_register (reg->regnum, regs); |
| } |
| |
| if (*p++ != ';') |
| error ("Remote register badly formatted: %s\nhere: %s", |
| buf, p); |
| } |
| } |
| /* fall through */ |
| case 'S': /* Old style status, just signal only */ |
| status->kind = TARGET_WAITKIND_STOPPED; |
| status->value.sig = (enum target_signal) |
| (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
| |
| if (buf[3] == 'p') |
| { |
| thread_num = strtol ((const char *) &buf[4], NULL, 16); |
| record_currthread (thread_num); |
| } |
| goto got_status; |
| case 'W': /* Target exited */ |
| { |
| /* The remote process exited. */ |
| status->kind = TARGET_WAITKIND_EXITED; |
| status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
| goto got_status; |
| } |
| case 'X': |
| status->kind = TARGET_WAITKIND_SIGNALLED; |
| status->value.sig = (enum target_signal) |
| (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
| kill_kludge = 1; |
| |
| goto got_status; |
| case 'O': /* Console output */ |
| remote_console_output (buf + 1); |
| /* Return immediately to the event loop. The event loop will |
| still be waiting on the inferior afterwards. */ |
| status->kind = TARGET_WAITKIND_IGNORE; |
| goto got_status; |
| case '\0': |
| if (last_sent_signal != TARGET_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", |
| target_signal_to_name (last_sent_signal)); |
| last_sent_signal = TARGET_SIGNAL_0; |
| target_terminal_inferior (); |
| |
| strcpy ((char *) buf, last_sent_step ? "s" : "c"); |
| putpkt ((char *) buf); |
| continue; |
| } |
| /* else fallthrough */ |
| default: |
| warning ("Invalid remote reply: %s", buf); |
| continue; |
| } |
| } |
| got_status: |
| if (thread_num != -1) |
| { |
| return pid_to_ptid (thread_num); |
| } |
| return inferior_ptid; |
| } |
| |
| /* Number of bytes of registers this stub implements. */ |
| |
| static int register_bytes_found; |
| |
| /* Read the remote registers into the block REGS. */ |
| /* Currently we just read all the registers, so we don't use regnum. */ |
| |
| static void |
| remote_fetch_registers (int regnum) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| int i; |
| char *p; |
| char *regs = alloca (rs->sizeof_g_packet); |
| |
| set_thread (PIDGET (inferior_ptid), 1); |
| |
| if (regnum >= 0) |
| { |
| struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); |
| gdb_assert (reg != NULL); |
| if (!reg->in_g_packet) |
| internal_error (__FILE__, __LINE__, |
| "Attempt to fetch a non G-packet register when this " |
| "remote.c does not support the p-packet."); |
| } |
| |
| sprintf (buf, "g"); |
| remote_send (buf, (rs->remote_packet_size)); |
| |
| /* Save the size of the packet sent to us by the target. Its used |
| as a heuristic when determining the max size of packets that the |
| target can safely receive. */ |
| if ((rs->actual_register_packet_size) == 0) |
| (rs->actual_register_packet_size) = strlen (buf); |
| |
| /* Unimplemented registers read as all bits zero. */ |
| memset (regs, 0, rs->sizeof_g_packet); |
| |
| /* 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 ((buf[0] < '0' || buf[0] > '9') |
| && (buf[0] < 'a' || buf[0] > 'f') |
| && buf[0] != 'x') /* New: unavailable register value */ |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "Bad register packet; fetching a new packet\n"); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| } |
| |
| /* 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 = buf; |
| for (i = 0; i < rs->sizeof_g_packet; i++) |
| { |
| if (p[0] == 0) |
| break; |
| if (p[1] == 0) |
| { |
| warning ("Remote reply is of odd length: %s", buf); |
| /* Don't change register_bytes_found in this case, and don't |
| print a second warning. */ |
| goto supply_them; |
| } |
| if (p[0] == 'x' && p[1] == 'x') |
| regs[i] = 0; /* 'x' */ |
| else |
| regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
| p += 2; |
| } |
| |
| if (i != register_bytes_found) |
| { |
| register_bytes_found = i; |
| if (REGISTER_BYTES_OK_P () |
| && !REGISTER_BYTES_OK (i)) |
| warning ("Remote reply is too short: %s", buf); |
| } |
| |
| supply_them: |
| { |
| int i; |
| for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) |
| { |
| struct packet_reg *r = &rs->regs[i]; |
| if (r->in_g_packet) |
| { |
| if (r->offset * 2 >= strlen (buf)) |
| /* A short packet that didn't include the register's |
| value, this implies that the register is zero (and |
| not that the register is unavailable). Supply that |
| zero value. */ |
| regcache_raw_supply (current_regcache, r->regnum, NULL); |
| else if (buf[r->offset * 2] == 'x') |
| { |
| gdb_assert (r->offset * 2 < strlen (buf)); |
| /* The register isn't available, mark it as such (at |
| the same time setting the value to zero). */ |
| regcache_raw_supply (current_regcache, r->regnum, NULL); |
| set_register_cached (i, -1); |
| } |
| else |
| regcache_raw_supply (current_regcache, r->regnum, |
| regs + r->offset); |
| } |
| } |
| } |
| } |
| |
| /* 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 (void) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int i; |
| char buf[MAX_REGISTER_SIZE]; |
| |
| /* Make sure the entire registers array is valid. */ |
| switch (remote_protocol_P.support) |
| { |
| case PACKET_DISABLE: |
| case PACKET_SUPPORT_UNKNOWN: |
| /* Make sure all the necessary registers are cached. */ |
| for (i = 0; i < NUM_REGS; i++) |
| if (rs->regs[i].in_g_packet) |
| regcache_raw_read (current_regcache, rs->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 (int regnum) |
| { |
| struct remote_state *rs = get_remote_state (); |
| struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); |
| /* Try storing a single register. */ |
| char *buf = alloca (rs->remote_packet_size); |
| char regp[MAX_REGISTER_SIZE]; |
| char *p; |
| int i; |
| |
| sprintf (buf, "P%s=", phex_nz (reg->pnum, 0)); |
| p = buf + strlen (buf); |
| regcache_collect (reg->regnum, regp); |
| bin2hex (regp, p, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum)); |
| remote_send (buf, rs->remote_packet_size); |
| |
| return buf[0] != '\0'; |
| } |
| |
| |
| /* 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 (int regnum) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf; |
| char *regs; |
| int i; |
| char *p; |
| |
| set_thread (PIDGET (inferior_ptid), 1); |
| |
| if (regnum >= 0) |
| { |
| switch (remote_protocol_P.support) |
| { |
| case PACKET_DISABLE: |
| break; |
| case PACKET_ENABLE: |
| if (store_register_using_P (regnum)) |
| return; |
| else |
| error ("Protocol error: P packet not recognized by stub"); |
| case PACKET_SUPPORT_UNKNOWN: |
| if (store_register_using_P (regnum)) |
| { |
| /* The stub recognized the 'P' packet. Remember this. */ |
| remote_protocol_P.support = PACKET_ENABLE; |
| return; |
| } |
| else |
| { |
| /* The stub does not support the 'P' packet. Use 'G' |
| instead, and don't try using 'P' in the future (it |
| will just waste our time). */ |
| remote_protocol_P.support = PACKET_DISABLE; |
| break; |
| } |
| } |
| } |
| |
| /* Extract all the registers in the regcache copying them into a |
| local buffer. */ |
| { |
| int i; |
| regs = alloca (rs->sizeof_g_packet); |
| memset (regs, rs->sizeof_g_packet, 0); |
| for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) |
| { |
| struct packet_reg *r = &rs->regs[i]; |
| if (r->in_g_packet) |
| regcache_collect (r->regnum, regs + r->offset); |
| } |
| } |
| |
| /* Command describes registers byte by byte, |
| each byte encoded as two hex characters. */ |
| buf = alloca (rs->remote_packet_size); |
| p = buf; |
| *p++ = 'G'; |
| /* remote_prepare_to_store insures that register_bytes_found gets set. */ |
| bin2hex (regs, p, register_bytes_found); |
| remote_send (buf, (rs->remote_packet_size)); |
| } |
| |
| |
| /* 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) |
| { |
| if (remote_address_size > 0 |
| && remote_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 << remote_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 (remote_protocol_binary_download.support) |
| { |
| case PACKET_DISABLE: |
| break; |
| case PACKET_ENABLE: |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| { |
| char *buf = alloca (rs->remote_packet_size); |
| char *p; |
| |
| p = buf; |
| *p++ = 'X'; |
| p += hexnumstr (p, (ULONGEST) addr); |
| *p++ = ','; |
| p += hexnumstr (p, (ULONGEST) 0); |
| *p++ = ':'; |
| *p = '\0'; |
| |
| putpkt_binary (buf, (int) (p - buf)); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| if (buf[0] == '\0') |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "binary downloading NOT suppported by target\n"); |
| remote_protocol_binary_download.support = PACKET_DISABLE; |
| } |
| else |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "binary downloading suppported by target\n"); |
| remote_protocol_binary_download.support = PACKET_ENABLE; |
| } |
| break; |
| } |
| } |
| } |
| |
| /* 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. |
| |
| Returns number of bytes transferred, or 0 (setting errno) for |
| error. Only transfer a single packet. */ |
| |
| int |
| remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
| { |
| unsigned char *buf; |
| unsigned char *p; |
| unsigned char *plen; |
| long sizeof_buf; |
| int plenlen; |
| int todo; |
| int nr_bytes; |
| int payload_size; |
| unsigned char *payload_start; |
| |
| /* Verify that the target can support a binary download. */ |
| check_binary_download (memaddr); |
| |
| /* Compute the size, and then allocate space for the largest |
| possible packet. Include space for an extra trailing NUL. */ |
| sizeof_buf = get_memory_write_packet_size () + 1; |
| buf = alloca (sizeof_buf); |
| |
| /* Compute the size of the actual payload by subtracting out the |
| packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ |
| payload_size = (get_memory_write_packet_size () - (strlen ("$M,:#NN") |
| + hexnumlen (memaddr) |
| + hexnumlen (len))); |
| |
| /* Construct the packet header: "[MX]<memaddr>,<len>:". */ |
| |
| /* Append "[XM]". Compute a best guess of the number of bytes |
| actually transfered. */ |
| p = buf; |
| switch (remote_protocol_binary_download.support) |
| { |
| case PACKET_ENABLE: |
| *p++ = 'X'; |
| /* Best guess at number of bytes that will fit. */ |
| todo = min (len, payload_size); |
| break; |
| case PACKET_DISABLE: |
| *p++ = 'M'; |
| /* num bytes that will fit */ |
| todo = min (len, payload_size / 2); |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| internal_error (__FILE__, __LINE__, |
| "remote_write_bytes: bad internal state"); |
| default: |
| internal_error (__FILE__, __LINE__, "bad switch"); |
| } |
| |
| /* Append "<memaddr>". */ |
| memaddr = remote_address_masked (memaddr); |
| p += hexnumstr (p, (ULONGEST) memaddr); |
| |
| /* Append ",". */ |
| *p++ = ','; |
| |
| /* Append <len>. Retain the location/size of <len>. It may need to |
| be adjusted once the packet body has been created. */ |
| plen = p; |
| plenlen = hexnumstr (p, (ULONGEST) todo); |
| p += plenlen; |
| |
| /* Append ":". */ |
| *p++ = ':'; |
| *p = '\0'; |
| |
| /* Append the packet body. */ |
| payload_start = p; |
| switch (remote_protocol_binary_download.support) |
| { |
| case PACKET_ENABLE: |
| /* Binary mode. Send target system values byte by byte, in |
| increasing byte addresses. Only escape certain critical |
| characters. */ |
| for (nr_bytes = 0; |
| (nr_bytes < todo) && (p - payload_start) < payload_size; |
| nr_bytes++) |
| { |
| switch (myaddr[nr_bytes] & 0xff) |
| { |
| case '$': |
| case '#': |
| case 0x7d: |
| /* These must be escaped */ |
| *p++ = 0x7d; |
| *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20; |
| break; |
| default: |
| *p++ = myaddr[nr_bytes] & 0xff; |
| break; |
| } |
| } |
| if (nr_bytes < todo) |
| { |
| /* Escape chars have filled up the buffer prematurely, |
| and we have actually sent fewer bytes than planned. |
| Fix-up the length field of the packet. Use the same |
| number of characters as before. */ |
| plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen); |
| *plen = ':'; /* overwrite \0 from hexnumnstr() */ |
| } |
| break; |
| case PACKET_DISABLE: |
| /* Normal mode: Send target system values byte by byte, in |
| increasing byte addresses. Each byte is encoded as a two hex |
| value. */ |
| nr_bytes = bin2hex (myaddr, p, todo); |
| p += 2 * nr_bytes; |
| break; |
| case PACKET_SUPPORT_UNKNOWN: |
| internal_error (__FILE__, __LINE__, |
| "remote_write_bytes: bad internal state"); |
| default: |
| internal_error (__FILE__, __LINE__, "bad switch"); |
| } |
| |
| putpkt_binary (buf, (int) (p - buf)); |
| getpkt (buf, sizeof_buf, 0); |
| |
| if (buf[0] == 'E') |
| { |
| /* There is no correspondance between what the remote protocol |
| uses for errors and errno codes. We would like a cleaner way |
| of representing errors (big enough to include errno codes, |
| bfd_error codes, and others). But for now just return EIO. */ |
| errno = EIO; |
| return 0; |
| } |
| |
| /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer |
| bytes than we'd planned. */ |
| return nr_bytes; |
| } |
| |
| /* 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 is the number of bytes. |
| |
| Returns number of bytes transferred, or 0 for error. */ |
| |
| /* NOTE: cagney/1999-10-18: This function (and its siblings in other |
| remote targets) shouldn't attempt to read the entire buffer. |
| Instead it should read a single packet worth of data and then |
| return the byte size of that packet to the caller. The caller (its |
| caller and its callers caller ;-) already contains code for |
| handling partial reads. */ |
| |
| int |
| remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
| { |
| char *buf; |
| int max_buf_size; /* Max size of packet output buffer */ |
| long sizeof_buf; |
| int origlen; |
| |
| /* Create a buffer big enough for this packet. */ |
| max_buf_size = get_memory_read_packet_size (); |
| sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */ |
| buf = alloca (sizeof_buf); |
| |
| origlen = len; |
| while (len > 0) |
| { |
| char *p; |
| int todo; |
| int i; |
| |
| todo = min (len, max_buf_size / 2); /* num bytes that will fit */ |
| |
| /* construct "m"<memaddr>","<len>" */ |
| /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */ |
| memaddr = remote_address_masked (memaddr); |
| p = buf; |
| *p++ = 'm'; |
| p += hexnumstr (p, (ULONGEST) memaddr); |
| *p++ = ','; |
| p += hexnumstr (p, (ULONGEST) todo); |
| *p = '\0'; |
| |
| putpkt (buf); |
| getpkt (buf, sizeof_buf, 0); |
| |
| if (buf[0] == 'E' |
| && isxdigit (buf[1]) && isxdigit (buf[2]) |
| && buf[3] == '\0') |
| { |
| /* There is no correspondance between what the remote protocol uses |
| for errors and errno codes. We would like a cleaner way of |
| representing errors (big enough to include errno codes, bfd_error |
| codes, and others). But for now just return EIO. */ |
| errno = EIO; |
| return 0; |
| } |
| |
| /* Reply describes memory byte by byte, |
| each byte encoded as two hex characters. */ |
| |
| p = buf; |
| if ((i = hex2bin (p, myaddr, todo)) < todo) |
| { |
| /* Reply is short. This means that we were able to read |
| only part of what we wanted to. */ |
| return i + (origlen - len); |
| } |
| myaddr += todo; |
| memaddr += todo; |
| len -= todo; |
| } |
| return origlen; |
| } |
| |
| /* Read or write LEN bytes from inferior memory at MEMADDR, |
| transferring to or from debugger address BUFFER. Write to inferior if |
| SHOULD_WRITE is nonzero. Returns length of data written or read; 0 |
| for error. TARGET is unused. */ |
| |
| static int |
| remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len, |
| int should_write, struct mem_attrib *attrib, |
| struct target_ops *target) |
| { |
| CORE_ADDR targ_addr; |
| int targ_len; |
| int res; |
| |
| /* Should this be the selected frame? */ |
| gdbarch_remote_translate_xfer_address (current_gdbarch, current_regcache, |
| mem_addr, mem_len, |
| &targ_addr, &targ_len); |
| if (targ_len <= 0) |
| return 0; |
| |
| if (should_write) |
| res = remote_write_bytes (targ_addr, buffer, targ_len); |
| else |
| res = remote_read_bytes (targ_addr, buffer, targ_len); |
| |
| return res; |
| } |
| |
| 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. */ |
| |
| /* Read a single character from the remote end, masking it down to 7 bits. */ |
| |
| static int |
| readchar (int timeout) |
| { |
| int ch; |
| |
| ch = serial_readchar (remote_desc, timeout); |
| |
| if (ch >= 0) |
| return (ch & 0x7f); |
| |
| switch ((enum serial_rc) ch) |
| { |
| case SERIAL_EOF: |
| target_mourn_inferior (); |
| error ("Remote connection closed"); |
| /* no return */ |
| case SERIAL_ERROR: |
| perror_with_name ("Remote communication error"); |
| /* no return */ |
| case SERIAL_TIMEOUT: |
| break; |
| } |
| return ch; |
| } |
| |
| /* Send the command in BUF to the remote machine, and read the reply |
| into BUF. Report an error if we get an error reply. */ |
| |
| 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); |
| } |
| |
| /* Display a null-terminated packet on stdout, for debugging, using C |
| string notation. */ |
| |
| static void |
| print_packet (char *buf) |
| { |
| puts_filtered ("\""); |
| fputstr_filtered (buf, '"', gdb_stdout); |
| puts_filtered ("\""); |
| } |
| |
| int |
| putpkt (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 (rs->remote_packet_size) - 5 |
| to account for the $, # and checksum, and for a possible /0 if we are |
| debugging (remote_debug) and want to print the sent packet as a string */ |
| |
| static int |
| putpkt_binary (char *buf, int cnt) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int i; |
| unsigned char csum = 0; |
| char *buf2 = alloca (cnt + 6); |
| long sizeof_junkbuf = (rs->remote_packet_size); |
| char *junkbuf = alloca (sizeof_junkbuf); |
| |
| int ch; |
| int tcount = 0; |
| char *p; |
| |
| /* Copy the packet into buffer BUF2, encapsulating it |
| and giving it a checksum. */ |
| |
| p = buf2; |
| *p++ = '$'; |
| |
| 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) |
| { |
| *p = '\0'; |
| fprintf_unfiltered (gdb_stdlog, "Sending packet: "); |
| fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog); |
| fprintf_unfiltered (gdb_stdlog, "..."); |
| gdb_flush (gdb_stdlog); |
| } |
| if (serial_write (remote_desc, buf2, p - buf2)) |
| perror_with_name ("putpkt: write failed"); |
| |
| /* read until either a timeout occurs (-2) or '+' is read */ |
| while (1) |
| { |
| ch = readchar (remote_timeout); |
| |
| if (remote_debug) |
| { |
| switch (ch) |
| { |
| case '+': |
| case '-': |
| case SERIAL_TIMEOUT: |
| case '$': |
| if (started_error_output) |
| { |
| putchar_unfiltered ('\n'); |
| started_error_output = 0; |
| } |
| } |
| } |
| |
| switch (ch) |
| { |
| case '+': |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
| return 1; |
| case '-': |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "Nak\n"); |
| case SERIAL_TIMEOUT: |
| tcount++; |
| if (tcount > 3) |
| return 0; |
| break; /* Retransmit buffer */ |
| case '$': |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n"); |
| /* It's probably an old response, and we're out of sync. |
| Just gobble up the packet and ignore it. */ |
| read_frame (junkbuf, sizeof_junkbuf); |
| continue; /* Now, go look for + */ |
| } |
| 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 |
| } |
| } |
| |
| /* Come here after finding the start of the frame. Collect the rest |
| into BUF, verifying the checksum, length, and handling run-length |
| compression. No more than sizeof_buf-1 characters are read so that |
| the buffer can be NUL terminated. |
| |
| 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, |
| long sizeof_buf) |
| { |
| unsigned char csum; |
| long bc; |
| int c; |
| |
| csum = 0; |
| bc = 0; |
| |
| while (1) |
| { |
| /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */ |
| 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; |
| } |
| |
| pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); |
| if (csum == pktcsum) |
| return bc; |
| |
| if (remote_debug) |
| { |
| fprintf_filtered (gdb_stdlog, |
| "Bad checksum, sentsum=0x%x, csum=0x%x, buf=", |
| pktcsum, csum); |
| fputs_filtered (buf, gdb_stdlog); |
| fputs_filtered ("\n", gdb_stdlog); |
| } |
| /* Number of characters in buffer ignoring trailing |
| NUL. */ |
| 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 |
| && bc + repeat - 1 < sizeof_buf - 1) |
| { |
| memset (&buf[bc], buf[bc - 1], repeat); |
| bc += repeat; |
| continue; |
| } |
| |
| buf[bc] = '\0'; |
| printf_filtered ("Repeat count %d too large for buffer: ", repeat); |
| puts_filtered (buf); |
| puts_filtered ("\n"); |
| return -1; |
| } |
| default: |
| if (bc < sizeof_buf - 1) |
| { |
| buf[bc++] = c; |
| csum += c; |
| continue; |
| } |
| |
| buf[bc] = '\0'; |
| puts_filtered ("Remote packet too long: "); |
| puts_filtered (buf); |
| puts_filtered ("\n"); |
| |
| return -1; |
| } |
| } |
| } |
| |
| /* Read a packet from the remote machine, with error checking, and |
| store it in 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) |
| { |
| int timed_out; |
| |
| timed_out = getpkt_sane (buf, sizeof_buf, forever); |
| } |
| |
| |
| /* Read a packet from the remote machine, with error checking, and |
| store it in 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. */ |
| static int |
| getpkt_sane (char *buf, |
| long sizeof_buf, |
| int forever) |
| { |
| int c; |
| int tries; |
| int timeout; |
| int val; |
| |
| strcpy (buf, "timeout"); |
| |
| if (forever) |
| { |
| timeout = watchdog > 0 ? watchdog : -1; |
| } |
| |
| else |
| timeout = remote_timeout; |
| |
| #define MAX_TRIES 3 |
| |
| 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 a zero from readchar |
| because of timeout. Then we'll count that as a retry. */ |
| |
| /* Note that 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); |
| |
| if (c == SERIAL_TIMEOUT) |
| { |
| if (forever) /* Watchdog went off? Kill the target. */ |
| { |
| QUIT; |
| target_mourn_inferior (); |
| error ("Watchdog has expired. Target detached.\n"); |
| } |
| if (remote_debug) |
| fputs_filtered ("Timed out.\n", gdb_stdlog); |
| goto retry; |
| } |
| } |
| while (c != '$'); |
| |
| /* We've found the start of a packet, now collect the data. */ |
| |
| val = read_frame (buf, sizeof_buf); |
| |
| if (val >= 0) |
| { |
| if (remote_debug) |
| { |
| fprintf_unfiltered (gdb_stdlog, "Packet received: "); |
| fputstr_unfiltered (buf, 0, gdb_stdlog); |
| fprintf_unfiltered (gdb_stdlog, "\n"); |
| } |
| serial_write (remote_desc, "+", 1); |
| return 0; |
| } |
| |
| /* Try the whole thing again. */ |
| retry: |
| serial_write (remote_desc, "-", 1); |
| } |
| |
| /* We have tried hard enough, and just can't receive the packet. Give up. */ |
| |
| printf_unfiltered ("Ignoring packet error, continuing...\n"); |
| serial_write (remote_desc, "+", 1); |
| return 1; |
| } |
| |
| static void |
| remote_kill (void) |
| { |
| /* For some mysterious reason, wait_for_inferior calls kill instead of |
| mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ |
| if (kill_kludge) |
| { |
| kill_kludge = 0; |
| target_mourn_inferior (); |
| return; |
| } |
| |
| /* Use catch_errors so the user can quit from gdb even when we aren't on |
| speaking terms with the remote system. */ |
| catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); |
| |
| /* Don't wait for it to die. I'm not really sure it matters whether |
| we do or not. For the existing stubs, kill is a noop. */ |
| target_mourn_inferior (); |
| } |
| |
| /* Async version of remote_kill. */ |
| static void |
| remote_async_kill (void) |
| { |
| /* Unregister the file descriptor from the event loop. */ |
| if (target_is_async_p ()) |
| serial_async (remote_desc, NULL, 0); |
| |
| /* For some mysterious reason, wait_for_inferior calls kill instead of |
| mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ |
| if (kill_kludge) |
| { |
| kill_kludge = 0; |
| target_mourn_inferior (); |
| return; |
| } |
| |
| /* Use catch_errors so the user can quit from gdb even when we aren't on |
| speaking terms with the remote system. */ |
| catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); |
| |
| /* Don't wait for it to die. I'm not really sure it matters whether |
| we do or not. For the existing stubs, kill is a noop. */ |
| target_mourn_inferior (); |
| } |
| |
| static void |
| remote_mourn (void) |
| { |
| remote_mourn_1 (&remote_ops); |
| } |
| |
| static void |
| remote_async_mourn (void) |
| { |
| remote_mourn_1 (&remote_async_ops); |
| } |
| |
| static void |
| extended_remote_mourn (void) |
| { |
| /* We do _not_ want to mourn the target like this; this will |
| remove the extended remote target from the target stack, |
| and the next time the user says "run" it'll fail. |
| |
| FIXME: What is the right thing to do here? */ |
| #if 0 |
| remote_mourn_1 (&extended_remote_ops); |
| #endif |
| } |
| |
| /* Worker function for remote_mourn. */ |
| static void |
| remote_mourn_1 (struct target_ops *target) |
| { |
| unpush_target (target); |
| generic_mourn_inferior (); |
| } |
| |
| /* 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. |
| |
| FIXME: One day add support for changing the exec file |
| we're debugging, arguments and an environment. */ |
| |
| static void |
| extended_remote_create_inferior (char *exec_file, char *args, char **env, |
| int from_tty) |
| { |
| /* Rip out the breakpoints; we'll reinsert them after restarting |
| the remote server. */ |
| remove_breakpoints (); |
| |
| /* Now restart the remote server. */ |
| extended_remote_restart (); |
| |
| /* Now put the breakpoints back in. This way we're safe if the |
| restart function works via a unix fork on the remote side. */ |
| insert_breakpoints (); |
| |
| /* Clean up from the last time we were running. */ |
| clear_proceed_status (); |
| |
| /* Let the remote process run. */ |
| proceed (-1, TARGET_SIGNAL_0, 0); |
| } |
| |
| /* Async version of extended_remote_create_inferior. */ |
| static void |
| extended_remote_async_create_inferior (char *exec_file, char *args, char **env, |
| int from_tty) |
| { |
| /* Rip out the breakpoints; we'll reinsert them after restarting |
| the remote server. */ |
| remove_breakpoints (); |
| |
| /* If running asynchronously, register the target file descriptor |
| with the event loop. */ |
| if (event_loop_p && target_can_async_p ()) |
| target_async (inferior_event_handler, 0); |
| |
| /* Now restart the remote server. */ |
| extended_remote_restart (); |
| |
| /* Now put the breakpoints back in. This way we're safe if the |
| restart function works via a unix fork on the remote side. */ |
| insert_breakpoints (); |
| |
| /* Clean up from the last time we were running. */ |
| clear_proceed_status (); |
| |
| /* Let the remote process run. */ |
| proceed (-1, TARGET_SIGNAL_0, 0); |
| } |
| |
| |
| /* On some machines, e.g. 68k, we may use a different breakpoint |
| instruction than other targets; in those use |
| DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC. |
| Also, bi-endian targets may define |
| DEPRECATED_LITTLE_REMOTE_BREAKPOINT and |
| DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we |
| just call the standard routines that are in mem-break.c. */ |
| |
| /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator |
| target should use an identical BREAKPOINT_FROM_PC. As for native, |
| the ARCH-OS-tdep.c code can override the default. */ |
| |
| #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT) |
| #define DEPRECATED_REMOTE_BREAKPOINT |
| #endif |
| |
| #ifdef DEPRECATED_REMOTE_BREAKPOINT |
| |
| /* If the target isn't bi-endian, just pretend it is. */ |
| #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) |
| #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT |
| #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT |
| #endif |
| |
| static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT; |
| static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT; |
| |
| #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
| |
| /* Insert a breakpoint on targets that don't have any better |
| breakpoint support. We read the contents of the target location |
| and stash it, then overwrite it with a breakpoint instruction. |
| ADDR is the target location in the target machine. CONTENTS_CACHE |
| is a pointer to memory allocated for saving the target contents. |
| It is guaranteed by the caller to be long enough to save the number |
| of bytes returned by BREAKPOINT_FROM_PC. */ |
| |
| static int |
| remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
| { |
| struct remote_state *rs = get_remote_state (); |
| #ifdef DEPRECATED_REMOTE_BREAKPOINT |
| int val; |
| #endif |
| int bp_size; |
| |
| /* 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 (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) |
| { |
| char *buf = alloca (rs->remote_packet_size); |
| char *p = buf; |
| |
| addr = remote_address_masked (addr); |
| *(p++) = 'Z'; |
| *(p++) = '0'; |
| *(p++) = ','; |
| p += hexnumstr (p, (ULONGEST) addr); |
| BREAKPOINT_FROM_PC (&addr, &bp_size); |
| sprintf (p, ",%d", bp_size); |
| |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP])) |
| { |
| case PACKET_ERROR: |
| return -1; |
| case PACKET_OK: |
| return 0; |
| case PACKET_UNKNOWN: |
| break; |
| } |
| } |
| |
| #ifdef DEPRECATED_REMOTE_BREAKPOINT |
| val = target_read_memory (addr, contents_cache, sizeof big_break_insn); |
| |
| if (val == 0) |
| { |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| val = target_write_memory (addr, (char *) big_break_insn, |
| sizeof big_break_insn); |
| else |
| val = target_write_memory (addr, (char *) little_break_insn, |
| sizeof little_break_insn); |
| } |
| |
| return val; |
| #else |
| return memory_insert_breakpoint (addr, contents_cache); |
| #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
| } |
| |
| static int |
| remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int bp_size; |
| |
| if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) |
| { |
| char *buf = alloca (rs->remote_packet_size); |
| char *p = buf; |
| |
| *(p++) = 'z'; |
| *(p++) = '0'; |
| *(p++) = ','; |
| |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| BREAKPOINT_FROM_PC (&addr, &bp_size); |
| sprintf (p, ",%d", bp_size); |
| |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| return (buf[0] == 'E'); |
| } |
| |
| #ifdef DEPRECATED_REMOTE_BREAKPOINT |
| return target_write_memory (addr, contents_cache, sizeof big_break_insn); |
| #else |
| return memory_remove_breakpoint (addr, contents_cache); |
| #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
| } |
| |
| static int |
| watchpoint_to_Z_packet (int type) |
| { |
| switch (type) |
| { |
| case hw_write: |
| return 2; |
| break; |
| case hw_read: |
| return 3; |
| break; |
| case hw_access: |
| return 4; |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, |
| "hw_bp_to_z: bad watchpoint type %d", type); |
| } |
| } |
| |
| static int |
| remote_insert_watchpoint (CORE_ADDR addr, int len, int type) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| char *p; |
| enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| |
| if (remote_protocol_Z[packet].support == PACKET_DISABLE) |
| error ("Can't set hardware watchpoints without the '%s' (%s) packet\n", |
| remote_protocol_Z[packet].name, |
| remote_protocol_Z[packet].title); |
| |
| sprintf (buf, "Z%x,", packet); |
| p = strchr (buf, '\0'); |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| sprintf (p, ",%x", len); |
| |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| switch (packet_ok (buf, &remote_protocol_Z[packet])) |
| { |
| case PACKET_ERROR: |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_OK: |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| "remote_insert_watchpoint: reached end of function"); |
| } |
| |
| |
| static int |
| remote_remove_watchpoint (CORE_ADDR addr, int len, int type) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| char *p; |
| enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
| |
| if (remote_protocol_Z[packet].support == PACKET_DISABLE) |
| error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n", |
| remote_protocol_Z[packet].name, |
| remote_protocol_Z[packet].title); |
| |
| sprintf (buf, "z%x,", packet); |
| p = strchr (buf, '\0'); |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| sprintf (p, ",%x", len); |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| switch (packet_ok (buf, &remote_protocol_Z[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_breakpoint_limit = -1; |
| |
| static int |
| remote_check_watch_resources (int 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; |
| } |
| |
| static int |
| remote_stopped_by_watchpoint (void) |
| { |
| return remote_stopped_by_watchpoint_p; |
| } |
| |
| extern int stepped_after_stopped_by_watchpoint; |
| |
| static CORE_ADDR |
| remote_stopped_data_address (void) |
| { |
| if (remote_stopped_by_watchpoint () |
| || stepped_after_stopped_by_watchpoint) |
| return remote_watch_data_address; |
| return (CORE_ADDR)0; |
| } |
| |
| |
| static int |
| remote_insert_hw_breakpoint (CORE_ADDR addr, char *shadow) |
| { |
| int len = 0; |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| char *p = buf; |
| |
| /* The length field should be set to the size of a breakpoint |
| instruction. */ |
| |
| BREAKPOINT_FROM_PC (&addr, &len); |
| |
| if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) |
| error ("Can't set hardware breakpoint without the '%s' (%s) packet\n", |
| remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, |
| remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); |
| |
| *(p++) = 'Z'; |
| *(p++) = '1'; |
| *(p++) = ','; |
| |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| sprintf (p, ",%x", len); |
| |
| putpkt (buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) |
| { |
| case PACKET_ERROR: |
| case PACKET_UNKNOWN: |
| return -1; |
| case PACKET_OK: |
| return 0; |
| } |
| internal_error (__FILE__, __LINE__, |
| "remote_insert_hw_breakpoint: reached end of function"); |
| } |
| |
| |
| static int |
| remote_remove_hw_breakpoint (CORE_ADDR addr, char *shadow) |
| { |
| int len; |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| char *p = buf; |
| |
| /* The length field should be set to the size of a breakpoint |
| instruction. */ |
| |
| BREAKPOINT_FROM_PC (&addr, &len); |
| |
| if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) |
| error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n", |
| remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, |
| remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); |
| |
| *(p++) = 'z'; |
| *(p++) = '1'; |
| *(p++) = ','; |
| |
| addr = remote_address_masked (addr); |
| p += hexnumstr (p, (ULONGEST) addr); |
| sprintf (p, ",%x", len); |
| |
| putpkt(buf); |
| getpkt (buf, (rs->remote_packet_size), 0); |
| |
| switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) |
| { |
| 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"); |
| } |
| |
| /* Some targets are only capable of doing downloads, and afterwards |
| they switch to the remote serial protocol. This function provides |
| a clean way to get from the download target to the remote target. |
| It's basically just a wrapper so that we don't have to expose any |
| of the internal workings of remote.c. |
| |
| Prior to calling this routine, you should shutdown the current |
| target code, else you will get the "A program is being debugged |
| already..." message. Usually a call to pop_target() suffices. */ |
| |
| void |
| push_remote_target (char *name, int from_tty) |
| { |
| printf_filtered ("Switching to remote protocol\n"); |
| remote_open (name, from_tty); |
| } |
| |
| /* Table used by the crc32 function to calcuate the checksum. */ |
| |
| static unsigned long crc32_table[256] = |
| {0, 0}; |
| |
| static unsigned long |
| crc32 (unsigned char *buf, int len, unsigned int crc) |
| { |
| if (!crc32_table[1]) |
| { |
| /* Initialize the CRC table and the decoding table. */ |
| int i, j; |
| unsigned int c; |
| |
| for (i = 0; i < 256; i++) |
| { |
| for (c = i << 24, j = 8; j > 0; --j) |
| c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); |
| crc32_table[i] = c; |
| } |
| } |
| |
| while (len--) |
| { |
| crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; |
| buf++; |
| } |
| return crc; |
| } |
| |
| /* 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. |
| Depends on the target understanding the new "qCRC:" request. */ |
| |
| /* FIXME: cagney/1999-10-26: This command should be broken down into a |
| target method (target verify memory) and generic version of the |
| actual command. This will allow other high-level code (especially |
| generic_load()) to make use of this target functionality. */ |
| |
| static void |
| compare_sections_command (char *args, int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| asection *s; |
| unsigned long host_crc, target_crc; |
| extern bfd *exec_bfd; |
| struct cleanup *old_chain; |
| char *tmp; |
| char *sectdata; |
| const char *sectname; |
| char *buf = alloca (rs->remote_packet_size); |
| bfd_size_type size; |
| bfd_vma lma; |
| int matched = 0; |
| int mismatched = 0; |
| |
| if (!exec_bfd) |
| error ("command cannot be used without an exec file"); |
| if (!current_target.to_shortname || |
| strcmp (current_target.to_shortname, "remote") != 0) |
| error ("command can only be used with remote target"); |
| |
| for (s = exec_bfd->sections; s; s = s->next) |
| { |
| if (!(s->flags & SEC_LOAD)) |
| continue; /* skip non-loadable section */ |
| |
| 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; |
| /* FIXME: assumes lma can fit into long */ |
| sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size); |
| putpkt (buf); |
| |
| /* be clever; compute the host_crc before waiting for target reply */ |
| sectdata = xmalloc (size); |
| old_chain = make_cleanup (xfree, sectdata); |
| bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); |
| host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); |
| |
| getpkt (buf, (rs->remote_packet_size), 0); |
| if (buf[0] == 'E') |
| error ("target memory fault, section %s, range 0x%s -- 0x%s", |
| sectname, paddr (lma), paddr (lma + size)); |
| if (buf[0] != 'C') |
| error ("remote target does not support this operation"); |
| |
| for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++) |
| target_crc = target_crc * 16 + fromhex (*tmp); |
| |
| printf_filtered ("Section %s, range 0x%s -- 0x%s: ", |
| sectname, paddr (lma), paddr (lma + size)); |
| if (host_crc == target_crc) |
| 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 remote executable does not match\n\ |
| the loaded file\n"); |
| if (args && !matched) |
| printf_filtered ("No loaded section named '%s'.\n", args); |
| } |
| |
| static LONGEST |
| remote_xfer_partial (struct target_ops *ops, enum target_object object, |
| const char *annex, void *readbuf, const void *writebuf, |
| ULONGEST offset, LONGEST len) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int i; |
| char *buf2 = alloca (rs->remote_packet_size); |
| char *p2 = &buf2[0]; |
| char query_type; |
| |
| /* Only handle reads. */ |
| if (writebuf != NULL || readbuf == NULL) |
| return -1; |
| |
| /* Map pre-existing objects onto letters. DO NOT do this for new |
| objects!!! Instead specify new query packets. */ |
| switch (object) |
| { |
| case TARGET_OBJECT_KOD: |
| query_type = 'K'; |
| break; |
| case TARGET_OBJECT_AVR: |
| query_type = 'R'; |
| break; |
| |
| case TARGET_OBJECT_AUXV: |
| if (remote_protocol_qPart_auxv.support != PACKET_DISABLE) |
| { |
| unsigned int total = 0; |
| while (len > 0) |
| { |
| LONGEST n = min ((rs->remote_packet_size - 2) / 2, len); |
| snprintf (buf2, rs->remote_packet_size, |
| "qPart:auxv:read::%s,%s", |
| phex_nz (offset, sizeof offset), |
| phex_nz (n, sizeof n)); |
| i = putpkt (buf2); |
| if (i < 0) |
| return total > 0 ? total : i; |
| buf2[0] = '\0'; |
| getpkt (buf2, rs->remote_packet_size, 0); |
| if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK) |
| return total > 0 ? total : -1; |
| if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0') |
| break; /* Got EOF indicator. */ |
| /* Got some data. */ |
| i = hex2bin (buf2, readbuf, len); |
| if (i > 0) |
| { |
| readbuf = (void *) ((char *) readbuf + i); |
| offset += i; |
| len -= i; |
| total += i; |
| } |
| } |
| return total; |
| } |
| return -1; |
| |
| default: |
| return -1; |
| } |
| |
| /* Note: a zero OFFSET and LEN can be used to query the minimum |
| buffer size. */ |
| if (offset == 0 && len == 0) |
| return (rs->remote_packet_size); |
| /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is |
| not large enough let the caller. */ |
| if (len < (rs->remote_packet_size)) |
| return -1; |
| len = rs->remote_packet_size; |
| |
| /* except for querying the minimum buffer size, target must be open */ |
| if (!remote_desc) |
| error ("remote query is only available after target open"); |
| |
| gdb_assert (annex != NULL); |
| gdb_assert (readbuf != NULL); |
| |
| *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 < ((rs->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 (buf2); |
| if (i < 0) |
| return i; |
| |
| getpkt (readbuf, len, 0); |
| |
| return strlen (readbuf); |
| } |
| |
| static void |
| remote_rcmd (char *command, |
| struct ui_file *outbuf) |
| { |
| struct remote_state *rs = get_remote_state (); |
| int i; |
| char *buf = alloca (rs->remote_packet_size); |
| char *p = buf; |
| |
| if (!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 (buf, "qRcmd,"); |
| p = strchr (buf, '\0'); |
| |
| if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size)) |
| error ("\"monitor\" command ``%s'' is too long\n", command); |
| |
| /* Encode the actual command */ |
| bin2hex (command, p, 0); |
| |
| if (putpkt (buf) < 0) |
| error ("Communication problem with target\n"); |
| |
| /* get/display the response */ |
| while (1) |
| { |
| /* XXX - see also tracepoint.c:remote_get_noisy_reply() */ |
| buf[0] = '\0'; |
| getpkt (buf, (rs->remote_packet_size), 0); |
| if (buf[0] == '\0') |
| error ("Target does not support this command\n"); |
| 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 void |
| packet_command (char *args, int from_tty) |
| { |
| struct remote_state *rs = get_remote_state (); |
| char *buf = alloca (rs->remote_packet_size); |
| |
| if (!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 (buf, (rs->remote_packet_size), 0); |
| puts_filtered ("received: "); |
| print_packet (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_thread (sample_thread, 1); |
| } |
| |
| |
| static void |
| threadalive_test (char *cmd, int tty) |
| { |
| int sample_thread = SAMPLE_THREAD; |
| |
| if (remote_thread_alive (pid_to_ptid (sample_thread))) |
| 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 (ptid_t ptid) |
| { |
| static char buf[30]; |
| |
| sprintf (buf, "Thread %d", PIDGET (ptid)); |
| return buf; |
| } |
| |
| 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_xfer_memory = remote_xfer_memory; |
| 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_watchpoint = remote_stopped_by_watchpoint; |
| remote_ops.to_stopped_data_address = remote_stopped_data_address; |
| 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_insert_watchpoint = remote_insert_watchpoint; |
| remote_ops.to_remove_watchpoint = remote_remove_watchpoint; |
| remote_ops.to_kill = remote_kill; |
| remote_ops.to_load = generic_load; |
| remote_ops.to_mourn_inferior = remote_mourn; |
| remote_ops.to_thread_alive = remote_thread_alive; |
| remote_ops.to_find_new_threads = remote_threads_info; |
| remote_ops.to_pid_to_str = remote_pid_to_str; |
| remote_ops.to_extra_thread_info = remote_threads_extra_info; |
| remote_ops.to_stop = remote_stop; |
| remote_ops.to_xfer_partial = remote_xfer_partial; |
| remote_ops.to_rcmd = remote_rcmd; |
| remote_ops.to_stratum = process_stratum; |
| remote_ops.to_has_all_memory = 1; |
| remote_ops.to_has_memory = 1; |
| remote_ops.to_has_stack = 1; |
| remote_ops.to_has_registers = 1; |
| remote_ops.to_has_execution = 1; |
| remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
| remote_ops.to_magic = OPS_MAGIC; |
| } |
| |
| /* 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_mourn_inferior = extended_remote_mourn; |
| } |
| |
| static int |
| remote_can_async_p (void) |
| { |
| /* We're async whenever the serial device is. */ |
| return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc); |
| } |
| |
| static int |
| remote_is_async_p (void) |
| { |
| /* We're async whenever the serial device is. */ |
| return (current_target.to_async_mask_value) && serial_is_async_p (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 void (*async_client_callback) (enum inferior_event_type event_type, void *context); |
| static void *async_client_context; |
| 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. */ |
| async_client_callback (INF_REG_EVENT, async_client_context); |
| } |
| |
| static void |
| remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context) |
| { |
| if (current_target.to_async_mask_value == 0) |
| internal_error (__FILE__, __LINE__, |
| "Calling remote_async when async is masked"); |
| |
| if (callback != NULL) |
| { |
| serial_async (remote_desc, remote_async_serial_handler, NULL); |
| async_client_callback = callback; |
| async_client_context = context; |
| } |
| else |
| serial_async (remote_desc, NULL, NULL); |
| } |
| |
| /* Target async and target extended-async. |
| |
| This are temporary targets, until it is all tested. Eventually |
| async support will be incorporated int the usual 'remote' |
| target. */ |
| |
| static void |
| init_remote_async_ops (void) |
| { |
| remote_async_ops.to_shortname = "async"; |
| remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol"; |
| remote_async_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)."; |
| remote_async_ops.to_open = remote_async_open; |
| remote_async_ops.to_close = remote_close; |
| remote_async_ops.to_detach = remote_detach; |
| remote_async_ops.to_disconnect = remote_disconnect; |
| remote_async_ops.to_resume = remote_async_resume; |
| remote_async_ops.to_wait = remote_async_wait; |
| remote_async_ops.to_fetch_registers = remote_fetch_registers; |
| remote_async_ops.to_store_registers = remote_store_registers; |
| remote_async_ops.to_prepare_to_store = remote_prepare_to_store; |
| remote_async_ops.to_xfer_memory = remote_xfer_memory; |
| remote_async_ops.to_files_info = remote_files_info; |
| remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint; |
| remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint; |
| remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
| remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
| remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
| remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint; |
| remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint; |
| remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
| remote_async_ops.to_stopped_data_address = remote_stopped_data_address; |
| remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior; |
| remote_async_ops.to_terminal_ours = remote_async_terminal_ours; |
| remote_async_ops.to_kill = remote_async_kill; |
| remote_async_ops.to_load = generic_load; |
| remote_async_ops.to_mourn_inferior = remote_async_mourn; |
| remote_async_ops.to_thread_alive = remote_thread_alive; |
| remote_async_ops.to_find_new_threads = remote_threads_info; |
| remote_async_ops.to_pid_to_str = remote_pid_to_str; |
| remote_async_ops.to_extra_thread_info = remote_threads_extra_info; |
| remote_async_ops.to_stop = remote_stop; |
| remote_async_ops.to_xfer_partial = remote_xfer_partial; |
| remote_async_ops.to_rcmd = remote_rcmd; |
| remote_async_ops.to_stratum = process_stratum; |
| remote_async_ops.to_has_all_memory = 1; |
| remote_async_ops.to_has_memory = 1; |
| remote_async_ops.to_has_stack = 1; |
| remote_async_ops.to_has_registers = 1; |
| remote_async_ops.to_has_execution = 1; |
| remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
| remote_async_ops.to_can_async_p = remote_can_async_p; |
| remote_async_ops.to_is_async_p = remote_is_async_p; |
| remote_async_ops.to_async = remote_async; |
| remote_async_ops.to_async_mask_value = 1; |
| remote_async_ops.to_magic = OPS_MAGIC; |
| } |
| |
| /* Set up the async extended remote vector by making a copy of the standard |
| remote vector and adding to it. */ |
| |
| static void |
| init_extended_async_remote_ops (void) |
| { |
| extended_async_remote_ops = remote_async_ops; |
| |
| extended_async_remote_ops.to_shortname = "extended-async"; |
| extended_async_remote_ops.to_longname = |
| "Extended remote serial target in async gdb-specific protocol"; |
| extended_async_remote_ops.to_doc = |
| "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\ |
| Specify the serial device it is connected to (e.g. /dev/ttya).", |
| extended_async_remote_ops.to_open = extended_remote_async_open; |
| extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior; |
| extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn; |
| } |
| |
| static void |
| set_remote_cmd (char *args, int from_tty) |
| { |
| } |
| |
| static void |
| show_remote_cmd (char *args, int from_tty) |
| { |
| /* FIXME: cagney/2002-06-15: This function should iterate over |
| remote_show_cmdlist for a list of sub commands to show. */ |
| show_remote_protocol_Z_packet_cmd (args, from_tty, NULL); |
| show_remote_protocol_P_packet_cmd (args, from_tty, NULL); |
| show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL); |
| show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL); |
| show_remote_protocol_binary_download_cmd (args, from_tty, NULL); |
| show_remote_protocol_qPart_auxv_packet_cmd (args, from_tty, NULL); |
| } |
| |
| static void |
| build_remote_gdbarch_data (void) |
| { |
| remote_address_size = TARGET_ADDR_BIT; |
| } |
| |
| /* Saved pointer to previous owner of the new_objfile event. */ |
| static void (*remote_new_objfile_chain) (struct objfile *); |
| |
| /* Function to be called whenever a new objfile (shlib) is detected. */ |
| static void |
| remote_new_objfile (struct objfile *objfile) |
| { |
| if (remote_desc != 0) /* Have a remote connection */ |
| { |
| remote_check_symbols (objfile); |
| } |
| /* Call predecessor on chain, if any. */ |
| if (remote_new_objfile_chain != 0 && |
| remote_desc == 0) |
| remote_new_objfile_chain (objfile); |
| } |
| |
| void |
| _initialize_remote (void) |
| { |
| static struct cmd_list_element *remote_set_cmdlist; |
| static struct cmd_list_element *remote_show_cmdlist; |
| struct cmd_list_element *tmpcmd; |
| |
| /* architecture specific data */ |
| remote_gdbarch_data_handle = gdbarch_data_register_post_init (init_remote_state); |
| |
| /* Old tacky stuff. NOTE: This comes after the remote protocol so |
| that the remote protocol has been initialized. */ |
| DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size); |
| deprecated_register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data); |
| |
| init_remote_ops (); |
| add_target (&remote_ops); |
| |
| init_extended_remote_ops (); |
| add_target (&extended_remote_ops); |
| |
| init_remote_async_ops (); |
| add_target (&remote_async_ops); |
| |
| init_extended_async_remote_ops (); |
| add_target (&extended_async_remote_ops); |
| |
| /* Hook into new objfile notification. */ |
| remote_new_objfile_chain = deprecated_target_new_objfile_hook; |
| deprecated_target_new_objfile_hook = remote_new_objfile; |
| |
| #if 0 |
| init_remote_threadtests (); |
| #endif |
| |
| /* 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).", |
| &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.\n", |
| "Show whether to send break if interrupted.\n", |
| NULL, NULL, |
| &setlist, &showlist); |
| |
| /* 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).\n", |
| &setlist); |
| add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, |
| "Show the maximum number of bytes per memory write packet (deprecated).\n", |
| &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\n", |
| &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\n", |
| &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.\n", |
| &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.\n", |
| &remote_show_cmdlist); |
| |
| add_setshow_cmd ("hardware-watchpoint-limit", no_class, |
| var_zinteger, &remote_hw_watchpoint_limit, "\ |
| Set the maximum number of target hardware watchpoints.\n\ |
| Specify a negative limit for unlimited.", "\ |
| Show the maximum number of target hardware watchpoints.\n", |
| NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist); |
| add_setshow_cmd ("hardware-breakpoint-limit", no_class, |
| var_zinteger, &remote_hw_breakpoint_limit, "\ |
| Set the maximum number of target hardware breakpoints.\n\ |
| Specify a negative limit for unlimited.", "\ |
| Show the maximum number of target hardware breakpoints.\n", |
| NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist); |
| |
| add_show_from_set |
| (add_set_cmd ("remoteaddresssize", class_obscure, |
| var_integer, (char *) &remote_address_size, |
| "Set the maximum size of the address (in bits) \ |
| in a memory packet.\n", |
| &setlist), |
| &showlist); |
| |
| add_packet_config_cmd (&remote_protocol_binary_download, |
| "X", "binary-download", |
| set_remote_protocol_binary_download_cmd, |
| show_remote_protocol_binary_download_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 1); |
| #if 0 |
| /* XXXX - should ``set remotebinarydownload'' be retained for |
| compatibility. */ |
| add_show_from_set |
| (add_set_cmd ("remotebinarydownload", no_class, |
| var_boolean, (char *) &remote_binary_download, |
| "Set binary downloads.\n", &setlist), |
| &showlist); |
| #endif |
| |
| add_packet_config_cmd (&remote_protocol_vcont, |
| "vCont", "verbose-resume", |
| set_remote_protocol_vcont_packet_cmd, |
| show_remote_protocol_vcont_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_qSymbol, |
| "qSymbol", "symbol-lookup", |
| set_remote_protocol_qSymbol_packet_cmd, |
| show_remote_protocol_qSymbol_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_P, |
| "P", "set-register", |
| set_remote_protocol_P_packet_cmd, |
| show_remote_protocol_P_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 1); |
| |
| add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP], |
| "Z0", "software-breakpoint", |
| set_remote_protocol_Z_software_bp_packet_cmd, |
| show_remote_protocol_Z_software_bp_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP], |
| "Z1", "hardware-breakpoint", |
| set_remote_protocol_Z_hardware_bp_packet_cmd, |
| show_remote_protocol_Z_hardware_bp_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP], |
| "Z2", "write-watchpoint", |
| set_remote_protocol_Z_write_wp_packet_cmd, |
| show_remote_protocol_Z_write_wp_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP], |
| "Z3", "read-watchpoint", |
| set_remote_protocol_Z_read_wp_packet_cmd, |
| show_remote_protocol_Z_read_wp_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP], |
| "Z4", "access-watchpoint", |
| set_remote_protocol_Z_access_wp_packet_cmd, |
| show_remote_protocol_Z_access_wp_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| add_packet_config_cmd (&remote_protocol_qPart_auxv, |
| "qPart_auxv", "read-aux-vector", |
| set_remote_protocol_qPart_auxv_packet_cmd, |
| show_remote_protocol_qPart_auxv_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist, |
| 0); |
| |
| /* Keep the old ``set remote Z-packet ...'' working. */ |
| 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 ", |
| set_remote_protocol_Z_packet_cmd, |
| show_remote_protocol_Z_packet_cmd, |
| &remote_set_cmdlist, &remote_show_cmdlist); |
| |
| /* Eventually initialize fileio. See fileio.c */ |
| initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); |
| } |