| /* Interface between GDB and target environments, including files and processes |
| |
| Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
| Free Software Foundation, Inc. |
| |
| Contributed by Cygnus Support. Written by John Gilmore. |
| |
| 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #if !defined (TARGET_H) |
| #define TARGET_H |
| |
| struct objfile; |
| struct ui_file; |
| struct mem_attrib; |
| struct target_ops; |
| struct bp_target_info; |
| |
| /* This include file defines the interface between the main part |
| of the debugger, and the part which is target-specific, or |
| specific to the communications interface between us and the |
| target. |
| |
| A TARGET is an interface between the debugger and a particular |
| kind of file or process. Targets can be STACKED in STRATA, |
| so that more than one target can potentially respond to a request. |
| In particular, memory accesses will walk down the stack of targets |
| until they find a target that is interested in handling that particular |
| address. STRATA are artificial boundaries on the stack, within |
| which particular kinds of targets live. Strata exist so that |
| people don't get confused by pushing e.g. a process target and then |
| a file target, and wondering why they can't see the current values |
| of variables any more (the file target is handling them and they |
| never get to the process target). So when you push a file target, |
| it goes into the file stratum, which is always below the process |
| stratum. */ |
| |
| #include "bfd.h" |
| #include "symtab.h" |
| #include "dcache.h" |
| #include "memattr.h" |
| |
| enum strata |
| { |
| dummy_stratum, /* The lowest of the low */ |
| file_stratum, /* Executable files, etc */ |
| core_stratum, /* Core dump files */ |
| download_stratum, /* Downloading of remote targets */ |
| process_stratum, /* Executing processes */ |
| thread_stratum /* Executing threads */ |
| }; |
| |
| enum thread_control_capabilities |
| { |
| tc_none = 0, /* Default: can't control thread execution. */ |
| tc_schedlock = 1, /* Can lock the thread scheduler. */ |
| tc_switch = 2 /* Can switch the running thread on demand. */ |
| }; |
| |
| /* Stuff for target_wait. */ |
| |
| /* Generally, what has the program done? */ |
| enum target_waitkind |
| { |
| /* The program has exited. The exit status is in value.integer. */ |
| TARGET_WAITKIND_EXITED, |
| |
| /* The program has stopped with a signal. Which signal is in |
| value.sig. */ |
| TARGET_WAITKIND_STOPPED, |
| |
| /* The program has terminated with a signal. Which signal is in |
| value.sig. */ |
| TARGET_WAITKIND_SIGNALLED, |
| |
| /* The program is letting us know that it dynamically loaded something |
| (e.g. it called load(2) on AIX). */ |
| TARGET_WAITKIND_LOADED, |
| |
| /* The program has forked. A "related" process' ID is in |
| value.related_pid. I.e., if the child forks, value.related_pid |
| is the parent's ID. */ |
| |
| TARGET_WAITKIND_FORKED, |
| |
| /* The program has vforked. A "related" process's ID is in |
| value.related_pid. */ |
| |
| TARGET_WAITKIND_VFORKED, |
| |
| /* The program has exec'ed a new executable file. The new file's |
| pathname is pointed to by value.execd_pathname. */ |
| |
| TARGET_WAITKIND_EXECD, |
| |
| /* The program has entered or returned from a system call. On |
| HP-UX, this is used in the hardware watchpoint implementation. |
| The syscall's unique integer ID number is in value.syscall_id */ |
| |
| TARGET_WAITKIND_SYSCALL_ENTRY, |
| TARGET_WAITKIND_SYSCALL_RETURN, |
| |
| /* Nothing happened, but we stopped anyway. This perhaps should be handled |
| within target_wait, but I'm not sure target_wait should be resuming the |
| inferior. */ |
| TARGET_WAITKIND_SPURIOUS, |
| |
| /* An event has occured, but we should wait again. |
| Remote_async_wait() returns this when there is an event |
| on the inferior, but the rest of the world is not interested in |
| it. The inferior has not stopped, but has just sent some output |
| to the console, for instance. In this case, we want to go back |
| to the event loop and wait there for another event from the |
| inferior, rather than being stuck in the remote_async_wait() |
| function. This way the event loop is responsive to other events, |
| like for instance the user typing. */ |
| TARGET_WAITKIND_IGNORE |
| }; |
| |
| struct target_waitstatus |
| { |
| enum target_waitkind kind; |
| |
| /* Forked child pid, execd pathname, exit status or signal number. */ |
| union |
| { |
| int integer; |
| enum target_signal sig; |
| int related_pid; |
| char *execd_pathname; |
| int syscall_id; |
| } |
| value; |
| }; |
| |
| /* Possible types of events that the inferior handler will have to |
| deal with. */ |
| enum inferior_event_type |
| { |
| /* There is a request to quit the inferior, abandon it. */ |
| INF_QUIT_REQ, |
| /* Process a normal inferior event which will result in target_wait |
| being called. */ |
| INF_REG_EVENT, |
| /* Deal with an error on the inferior. */ |
| INF_ERROR, |
| /* We are called because a timer went off. */ |
| INF_TIMER, |
| /* We are called to do stuff after the inferior stops. */ |
| INF_EXEC_COMPLETE, |
| /* We are called to do some stuff after the inferior stops, but we |
| are expected to reenter the proceed() and |
| handle_inferior_event() functions. This is used only in case of |
| 'step n' like commands. */ |
| INF_EXEC_CONTINUE |
| }; |
| |
| /* Return the string for a signal. */ |
| extern char *target_signal_to_string (enum target_signal); |
| |
| /* Return the name (SIGHUP, etc.) for a signal. */ |
| extern char *target_signal_to_name (enum target_signal); |
| |
| /* Given a name (SIGHUP, etc.), return its signal. */ |
| enum target_signal target_signal_from_name (char *); |
| |
| /* Request the transfer of up to LEN 8-bit bytes of the target's |
| OBJECT. The OFFSET, for a seekable object, specifies the starting |
| point. The ANNEX can be used to provide additional data-specific |
| information to the target. |
| |
| Return the number of bytes actually transfered, zero when no |
| further transfer is possible, and -1 when the transfer is not |
| supported. |
| |
| NOTE: cagney/2003-10-17: The current interface does not support a |
| "retry" mechanism. Instead it assumes that at least one byte will |
| be transfered on each call. |
| |
| NOTE: cagney/2003-10-17: The current interface can lead to |
| fragmented transfers. Lower target levels should not implement |
| hacks, such as enlarging the transfer, in an attempt to compensate |
| for this. Instead, the target stack should be extended so that it |
| implements supply/collect methods and a look-aside object cache. |
| With that available, the lowest target can safely and freely "push" |
| data up the stack. |
| |
| NOTE: cagney/2003-10-17: Unlike the old query and the memory |
| transfer mechanisms, these methods are explicitly parameterized by |
| the target that it should be applied to. |
| |
| NOTE: cagney/2003-10-17: Just like the old query and memory xfer |
| methods, these new methods perform partial transfers. The only |
| difference is that these new methods thought to include "partial" |
| in the name. The old code's failure to do this lead to much |
| confusion and duplication of effort as each target object attempted |
| to locally take responsibility for something it didn't have to |
| worry about. |
| |
| NOTE: cagney/2003-10-17: With a TARGET_OBJECT_KOD object, for |
| backward compatibility with the "target_query" method that this |
| replaced, when OFFSET and LEN are both zero, return the "minimum" |
| buffer size. See "remote.c" for further information. */ |
| |
| enum target_object |
| { |
| /* Kernel Object Display transfer. See "kod.c" and "remote.c". */ |
| TARGET_OBJECT_KOD, |
| /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */ |
| TARGET_OBJECT_AVR, |
| /* Transfer up-to LEN bytes of memory starting at OFFSET. */ |
| TARGET_OBJECT_MEMORY, |
| /* Kernel Unwind Table. See "ia64-tdep.c". */ |
| TARGET_OBJECT_UNWIND_TABLE, |
| /* Transfer auxilliary vector. */ |
| TARGET_OBJECT_AUXV, |
| /* StackGhost cookie. See "sparc-tdep.c". */ |
| TARGET_OBJECT_WCOOKIE |
| |
| /* Possible future objects: TARGET_OBJECT_FILE, TARGET_OBJECT_PROC, ... */ |
| }; |
| |
| extern LONGEST target_read_partial (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, gdb_byte *buf, |
| ULONGEST offset, LONGEST len); |
| |
| extern LONGEST target_write_partial (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, const gdb_byte *buf, |
| ULONGEST offset, LONGEST len); |
| |
| /* Wrappers to perform the full transfer. */ |
| extern LONGEST target_read (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, gdb_byte *buf, |
| ULONGEST offset, LONGEST len); |
| |
| extern LONGEST target_write (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, const gdb_byte *buf, |
| ULONGEST offset, LONGEST len); |
| |
| /* Wrappers to target read/write that perform memory transfers. They |
| throw an error if the memory transfer fails. |
| |
| NOTE: cagney/2003-10-23: The naming schema is lifted from |
| "frame.h". The parameter order is lifted from get_frame_memory, |
| which in turn lifted it from read_memory. */ |
| |
| extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr, |
| gdb_byte *buf, LONGEST len); |
| extern ULONGEST get_target_memory_unsigned (struct target_ops *ops, |
| CORE_ADDR addr, int len); |
| |
| |
| /* If certain kinds of activity happen, target_wait should perform |
| callbacks. */ |
| /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible |
| on TARGET_ACTIVITY_FD. */ |
| extern int target_activity_fd; |
| /* Returns zero to leave the inferior alone, one to interrupt it. */ |
| extern int (*target_activity_function) (void); |
| |
| struct thread_info; /* fwd decl for parameter list below: */ |
| |
| struct target_ops |
| { |
| struct target_ops *beneath; /* To the target under this one. */ |
| char *to_shortname; /* Name this target type */ |
| char *to_longname; /* Name for printing */ |
| char *to_doc; /* Documentation. Does not include trailing |
| newline, and starts with a one-line descrip- |
| tion (probably similar to to_longname). */ |
| /* Per-target scratch pad. */ |
| void *to_data; |
| /* The open routine takes the rest of the parameters from the |
| command, and (if successful) pushes a new target onto the |
| stack. Targets should supply this routine, if only to provide |
| an error message. */ |
| void (*to_open) (char *, int); |
| /* Old targets with a static target vector provide "to_close". |
| New re-entrant targets provide "to_xclose" and that is expected |
| to xfree everything (including the "struct target_ops"). */ |
| void (*to_xclose) (struct target_ops *targ, int quitting); |
| void (*to_close) (int); |
| void (*to_attach) (char *, int); |
| void (*to_post_attach) (int); |
| void (*to_detach) (char *, int); |
| void (*to_disconnect) (char *, int); |
| void (*to_resume) (ptid_t, int, enum target_signal); |
| ptid_t (*to_wait) (ptid_t, struct target_waitstatus *); |
| void (*to_fetch_registers) (int); |
| void (*to_store_registers) (int); |
| void (*to_prepare_to_store) (void); |
| |
| /* Transfer LEN bytes of memory between GDB address MYADDR and |
| target address MEMADDR. If WRITE, transfer them to the target, else |
| transfer them from the target. TARGET is the target from which we |
| get this function. |
| |
| Return value, N, is one of the following: |
| |
| 0 means that we can't handle this. If errno has been set, it is the |
| error which prevented us from doing it (FIXME: What about bfd_error?). |
| |
| positive (call it N) means that we have transferred N bytes |
| starting at MEMADDR. We might be able to handle more bytes |
| beyond this length, but no promises. |
| |
| negative (call its absolute value N) means that we cannot |
| transfer right at MEMADDR, but we could transfer at least |
| something at MEMADDR + N. |
| |
| NOTE: cagney/2004-10-01: This has been entirely superseeded by |
| to_xfer_partial and inferior inheritance. */ |
| |
| int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr, |
| int len, int write, |
| struct mem_attrib *attrib, |
| struct target_ops *target); |
| |
| void (*to_files_info) (struct target_ops *); |
| int (*to_insert_breakpoint) (struct bp_target_info *); |
| int (*to_remove_breakpoint) (struct bp_target_info *); |
| int (*to_can_use_hw_breakpoint) (int, int, int); |
| int (*to_insert_hw_breakpoint) (struct bp_target_info *); |
| int (*to_remove_hw_breakpoint) (struct bp_target_info *); |
| int (*to_remove_watchpoint) (CORE_ADDR, int, int); |
| int (*to_insert_watchpoint) (CORE_ADDR, int, int); |
| int (*to_stopped_by_watchpoint) (void); |
| int to_have_continuable_watchpoint; |
| int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *); |
| int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int); |
| void (*to_terminal_init) (void); |
| void (*to_terminal_inferior) (void); |
| void (*to_terminal_ours_for_output) (void); |
| void (*to_terminal_ours) (void); |
| void (*to_terminal_save_ours) (void); |
| void (*to_terminal_info) (char *, int); |
| void (*to_kill) (void); |
| void (*to_load) (char *, int); |
| int (*to_lookup_symbol) (char *, CORE_ADDR *); |
| void (*to_create_inferior) (char *, char *, char **, int); |
| void (*to_post_startup_inferior) (ptid_t); |
| void (*to_acknowledge_created_inferior) (int); |
| void (*to_insert_fork_catchpoint) (int); |
| int (*to_remove_fork_catchpoint) (int); |
| void (*to_insert_vfork_catchpoint) (int); |
| int (*to_remove_vfork_catchpoint) (int); |
| int (*to_follow_fork) (struct target_ops *, int); |
| void (*to_insert_exec_catchpoint) (int); |
| int (*to_remove_exec_catchpoint) (int); |
| int (*to_reported_exec_events_per_exec_call) (void); |
| int (*to_has_exited) (int, int, int *); |
| void (*to_mourn_inferior) (void); |
| int (*to_can_run) (void); |
| void (*to_notice_signals) (ptid_t ptid); |
| int (*to_thread_alive) (ptid_t ptid); |
| void (*to_find_new_threads) (void); |
| char *(*to_pid_to_str) (ptid_t); |
| char *(*to_extra_thread_info) (struct thread_info *); |
| void (*to_stop) (void); |
| void (*to_rcmd) (char *command, struct ui_file *output); |
| struct symtab_and_line *(*to_enable_exception_callback) (enum |
| exception_event_kind, |
| int); |
| struct exception_event_record *(*to_get_current_exception_event) (void); |
| char *(*to_pid_to_exec_file) (int pid); |
| enum strata to_stratum; |
| int to_has_all_memory; |
| int to_has_memory; |
| int to_has_stack; |
| int to_has_registers; |
| int to_has_execution; |
| int to_has_thread_control; /* control thread execution */ |
| struct section_table |
| *to_sections; |
| struct section_table |
| *to_sections_end; |
| /* ASYNC target controls */ |
| int (*to_can_async_p) (void); |
| int (*to_is_async_p) (void); |
| void (*to_async) (void (*cb) (enum inferior_event_type, void *context), |
| void *context); |
| int to_async_mask_value; |
| int (*to_find_memory_regions) (int (*) (CORE_ADDR, |
| unsigned long, |
| int, int, int, |
| void *), |
| void *); |
| char * (*to_make_corefile_notes) (bfd *, int *); |
| |
| /* Return the thread-local address at OFFSET in the |
| thread-local storage for the thread PTID and the shared library |
| or executable file given by OBJFILE. If that block of |
| thread-local storage hasn't been allocated yet, this function |
| may return an error. */ |
| CORE_ADDR (*to_get_thread_local_address) (ptid_t ptid, |
| CORE_ADDR load_module_addr, |
| CORE_ADDR offset); |
| |
| /* Perform partial transfers on OBJECT. See target_read_partial |
| and target_write_partial for details of each variant. One, and |
| only one, of readbuf or writebuf must be non-NULL. */ |
| LONGEST (*to_xfer_partial) (struct target_ops *ops, |
| enum target_object object, const char *annex, |
| gdb_byte *readbuf, const gdb_byte *writebuf, |
| ULONGEST offset, LONGEST len); |
| |
| int to_magic; |
| /* Need sub-structure for target machine related rather than comm related? |
| */ |
| }; |
| |
| /* Magic number for checking ops size. If a struct doesn't end with this |
| number, somebody changed the declaration but didn't change all the |
| places that initialize one. */ |
| |
| #define OPS_MAGIC 3840 |
| |
| /* The ops structure for our "current" target process. This should |
| never be NULL. If there is no target, it points to the dummy_target. */ |
| |
| extern struct target_ops current_target; |
| |
| /* Define easy words for doing these operations on our current target. */ |
| |
| #define target_shortname (current_target.to_shortname) |
| #define target_longname (current_target.to_longname) |
| |
| /* Does whatever cleanup is required for a target that we are no |
| longer going to be calling. QUITTING indicates that GDB is exiting |
| and should not get hung on an error (otherwise it is important to |
| perform clean termination, even if it takes a while). This routine |
| is automatically always called when popping the target off the |
| target stack (to_beneath is undefined). Closing file descriptors |
| and freeing all memory allocated memory are typical things it |
| should do. */ |
| |
| void target_close (struct target_ops *targ, int quitting); |
| |
| /* Attaches to a process on the target side. Arguments are as passed |
| to the `attach' command by the user. This routine can be called |
| when the target is not on the target-stack, if the target_can_run |
| routine returns 1; in that case, it must push itself onto the stack. |
| Upon exit, the target should be ready for normal operations, and |
| should be ready to deliver the status of the process immediately |
| (without waiting) to an upcoming target_wait call. */ |
| |
| #define target_attach(args, from_tty) \ |
| (*current_target.to_attach) (args, from_tty) |
| |
| /* The target_attach operation places a process under debugger control, |
| and stops the process. |
| |
| This operation provides a target-specific hook that allows the |
| necessary bookkeeping to be performed after an attach completes. */ |
| #define target_post_attach(pid) \ |
| (*current_target.to_post_attach) (pid) |
| |
| /* Takes a program previously attached to and detaches it. |
| The program may resume execution (some targets do, some don't) and will |
| no longer stop on signals, etc. We better not have left any breakpoints |
| in the program or it'll die when it hits one. ARGS is arguments |
| typed by the user (e.g. a signal to send the process). FROM_TTY |
| says whether to be verbose or not. */ |
| |
| extern void target_detach (char *, int); |
| |
| /* Disconnect from the current target without resuming it (leaving it |
| waiting for a debugger). */ |
| |
| extern void target_disconnect (char *, int); |
| |
| /* Resume execution of the target process PTID. STEP says whether to |
| single-step or to run free; SIGGNAL is the signal to be given to |
| the target, or TARGET_SIGNAL_0 for no signal. The caller may not |
| pass TARGET_SIGNAL_DEFAULT. */ |
| |
| #define target_resume(ptid, step, siggnal) \ |
| do { \ |
| dcache_invalidate(target_dcache); \ |
| (*current_target.to_resume) (ptid, step, siggnal); \ |
| } while (0) |
| |
| /* Wait for process pid to do something. PTID = -1 to wait for any |
| pid to do something. Return pid of child, or -1 in case of error; |
| store status through argument pointer STATUS. Note that it is |
| _NOT_ OK to throw_exception() out of target_wait() without popping |
| the debugging target from the stack; GDB isn't prepared to get back |
| to the prompt with a debugging target but without the frame cache, |
| stop_pc, etc., set up. */ |
| |
| #define target_wait(ptid, status) \ |
| (*current_target.to_wait) (ptid, status) |
| |
| /* Fetch at least register REGNO, or all regs if regno == -1. No result. */ |
| |
| #define target_fetch_registers(regno) \ |
| (*current_target.to_fetch_registers) (regno) |
| |
| /* Store at least register REGNO, or all regs if REGNO == -1. |
| It can store as many registers as it wants to, so target_prepare_to_store |
| must have been previously called. Calls error() if there are problems. */ |
| |
| #define target_store_registers(regs) \ |
| (*current_target.to_store_registers) (regs) |
| |
| /* Get ready to modify the registers array. On machines which store |
| individual registers, this doesn't need to do anything. On machines |
| which store all the registers in one fell swoop, this makes sure |
| that REGISTERS contains all the registers from the program being |
| debugged. */ |
| |
| #define target_prepare_to_store() \ |
| (*current_target.to_prepare_to_store) () |
| |
| extern DCACHE *target_dcache; |
| |
| extern int do_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
| int write, struct mem_attrib *attrib); |
| |
| extern int target_read_string (CORE_ADDR, char **, int, int *); |
| |
| extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len); |
| |
| extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, |
| int len); |
| |
| extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
| struct mem_attrib *, struct target_ops *); |
| |
| extern int child_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
| struct mem_attrib *, struct target_ops *); |
| |
| /* Make a single attempt at transfering LEN bytes. On a successful |
| transfer, the number of bytes actually transfered is returned and |
| ERR is set to 0. When a transfer fails, -1 is returned (the number |
| of bytes actually transfered is not defined) and ERR is set to a |
| non-zero error indication. */ |
| |
| extern int target_read_memory_partial (CORE_ADDR addr, gdb_byte *buf, |
| int len, int *err); |
| |
| extern int target_write_memory_partial (CORE_ADDR addr, gdb_byte *buf, |
| int len, int *err); |
| |
| extern char *child_pid_to_exec_file (int); |
| |
| extern char *child_core_file_to_sym_file (char *); |
| |
| #if defined(CHILD_POST_ATTACH) |
| extern void child_post_attach (int); |
| #endif |
| |
| extern void child_post_startup_inferior (ptid_t); |
| |
| extern void child_acknowledge_created_inferior (int); |
| |
| extern void child_insert_fork_catchpoint (int); |
| |
| extern int child_remove_fork_catchpoint (int); |
| |
| extern void child_insert_vfork_catchpoint (int); |
| |
| extern int child_remove_vfork_catchpoint (int); |
| |
| extern void child_acknowledge_created_inferior (int); |
| |
| extern int child_follow_fork (struct target_ops *, int); |
| |
| extern void child_insert_exec_catchpoint (int); |
| |
| extern int child_remove_exec_catchpoint (int); |
| |
| extern int child_reported_exec_events_per_exec_call (void); |
| |
| extern int child_has_exited (int, int, int *); |
| |
| extern int child_thread_alive (ptid_t); |
| |
| /* From infrun.c. */ |
| |
| extern int inferior_has_forked (int pid, int *child_pid); |
| |
| extern int inferior_has_vforked (int pid, int *child_pid); |
| |
| extern int inferior_has_execd (int pid, char **execd_pathname); |
| |
| /* From exec.c */ |
| |
| extern void print_section_info (struct target_ops *, bfd *); |
| |
| /* Print a line about the current target. */ |
| |
| #define target_files_info() \ |
| (*current_target.to_files_info) (¤t_target) |
| |
| /* Insert a breakpoint at address BP_TGT->placed_address in the target |
| machine. Result is 0 for success, or an errno value. */ |
| |
| #define target_insert_breakpoint(bp_tgt) \ |
| (*current_target.to_insert_breakpoint) (bp_tgt) |
| |
| /* Remove a breakpoint at address BP_TGT->placed_address in the target |
| machine. Result is 0 for success, or an errno value. */ |
| |
| #define target_remove_breakpoint(bp_tgt) \ |
| (*current_target.to_remove_breakpoint) (bp_tgt) |
| |
| /* Initialize the terminal settings we record for the inferior, |
| before we actually run the inferior. */ |
| |
| #define target_terminal_init() \ |
| (*current_target.to_terminal_init) () |
| |
| /* Put the inferior's terminal settings into effect. |
| This is preparation for starting or resuming the inferior. */ |
| |
| #define target_terminal_inferior() \ |
| (*current_target.to_terminal_inferior) () |
| |
| /* Put some of our terminal settings into effect, |
| enough to get proper results from our output, |
| but do not change into or out of RAW mode |
| so that no input is discarded. |
| |
| After doing this, either terminal_ours or terminal_inferior |
| should be called to get back to a normal state of affairs. */ |
| |
| #define target_terminal_ours_for_output() \ |
| (*current_target.to_terminal_ours_for_output) () |
| |
| /* Put our terminal settings into effect. |
| First record the inferior's terminal settings |
| so they can be restored properly later. */ |
| |
| #define target_terminal_ours() \ |
| (*current_target.to_terminal_ours) () |
| |
| /* Save our terminal settings. |
| This is called from TUI after entering or leaving the curses |
| mode. Since curses modifies our terminal this call is here |
| to take this change into account. */ |
| |
| #define target_terminal_save_ours() \ |
| (*current_target.to_terminal_save_ours) () |
| |
| /* Print useful information about our terminal status, if such a thing |
| exists. */ |
| |
| #define target_terminal_info(arg, from_tty) \ |
| (*current_target.to_terminal_info) (arg, from_tty) |
| |
| /* Kill the inferior process. Make it go away. */ |
| |
| #define target_kill() \ |
| (*current_target.to_kill) () |
| |
| /* Load an executable file into the target process. This is expected |
| to not only bring new code into the target process, but also to |
| update GDB's symbol tables to match. |
| |
| ARG contains command-line arguments, to be broken down with |
| buildargv (). The first non-switch argument is the filename to |
| load, FILE; the second is a number (as parsed by strtoul (..., ..., |
| 0)), which is an offset to apply to the load addresses of FILE's |
| sections. The target may define switches, or other non-switch |
| arguments, as it pleases. */ |
| |
| extern void target_load (char *arg, int from_tty); |
| |
| /* Look up a symbol in the target's symbol table. NAME is the symbol |
| name. ADDRP is a CORE_ADDR * pointing to where the value of the |
| symbol should be returned. The result is 0 if successful, nonzero |
| if the symbol does not exist in the target environment. This |
| function should not call error() if communication with the target |
| is interrupted, since it is called from symbol reading, but should |
| return nonzero, possibly doing a complain(). */ |
| |
| #define target_lookup_symbol(name, addrp) \ |
| (*current_target.to_lookup_symbol) (name, addrp) |
| |
| /* Start an inferior process and set inferior_ptid to its pid. |
| EXEC_FILE is the file to run. |
| ALLARGS is a string containing the arguments to the program. |
| ENV is the environment vector to pass. Errors reported with error(). |
| On VxWorks and various standalone systems, we ignore exec_file. */ |
| |
| #define target_create_inferior(exec_file, args, env, FROM_TTY) \ |
| (*current_target.to_create_inferior) (exec_file, args, env, (FROM_TTY)) |
| |
| |
| /* Some targets (such as ttrace-based HPUX) don't allow us to request |
| notification of inferior events such as fork and vork immediately |
| after the inferior is created. (This because of how gdb gets an |
| inferior created via invoking a shell to do it. In such a scenario, |
| if the shell init file has commands in it, the shell will fork and |
| exec for each of those commands, and we will see each such fork |
| event. Very bad.) |
| |
| Such targets will supply an appropriate definition for this function. */ |
| |
| #define target_post_startup_inferior(ptid) \ |
| (*current_target.to_post_startup_inferior) (ptid) |
| |
| /* On some targets, the sequence of starting up an inferior requires |
| some synchronization between gdb and the new inferior process, PID. */ |
| |
| #define target_acknowledge_created_inferior(pid) \ |
| (*current_target.to_acknowledge_created_inferior) (pid) |
| |
| /* On some targets, we can catch an inferior fork or vfork event when |
| it occurs. These functions insert/remove an already-created |
| catchpoint for such events. */ |
| |
| #define target_insert_fork_catchpoint(pid) \ |
| (*current_target.to_insert_fork_catchpoint) (pid) |
| |
| #define target_remove_fork_catchpoint(pid) \ |
| (*current_target.to_remove_fork_catchpoint) (pid) |
| |
| #define target_insert_vfork_catchpoint(pid) \ |
| (*current_target.to_insert_vfork_catchpoint) (pid) |
| |
| #define target_remove_vfork_catchpoint(pid) \ |
| (*current_target.to_remove_vfork_catchpoint) (pid) |
| |
| /* If the inferior forks or vforks, this function will be called at |
| the next resume in order to perform any bookkeeping and fiddling |
| necessary to continue debugging either the parent or child, as |
| requested, and releasing the other. Information about the fork |
| or vfork event is available via get_last_target_status (). |
| This function returns 1 if the inferior should not be resumed |
| (i.e. there is another event pending). */ |
| |
| int target_follow_fork (int follow_child); |
| |
| /* On some targets, we can catch an inferior exec event when it |
| occurs. These functions insert/remove an already-created |
| catchpoint for such events. */ |
| |
| #define target_insert_exec_catchpoint(pid) \ |
| (*current_target.to_insert_exec_catchpoint) (pid) |
| |
| #define target_remove_exec_catchpoint(pid) \ |
| (*current_target.to_remove_exec_catchpoint) (pid) |
| |
| /* Returns the number of exec events that are reported when a process |
| invokes a flavor of the exec() system call on this target, if exec |
| events are being reported. */ |
| |
| #define target_reported_exec_events_per_exec_call() \ |
| (*current_target.to_reported_exec_events_per_exec_call) () |
| |
| /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the |
| exit code of PID, if any. */ |
| |
| #define target_has_exited(pid,wait_status,exit_status) \ |
| (*current_target.to_has_exited) (pid,wait_status,exit_status) |
| |
| /* The debugger has completed a blocking wait() call. There is now |
| some process event that must be processed. This function should |
| be defined by those targets that require the debugger to perform |
| cleanup or internal state changes in response to the process event. */ |
| |
| /* The inferior process has died. Do what is right. */ |
| |
| #define target_mourn_inferior() \ |
| (*current_target.to_mourn_inferior) () |
| |
| /* Does target have enough data to do a run or attach command? */ |
| |
| #define target_can_run(t) \ |
| ((t)->to_can_run) () |
| |
| /* post process changes to signal handling in the inferior. */ |
| |
| #define target_notice_signals(ptid) \ |
| (*current_target.to_notice_signals) (ptid) |
| |
| /* Check to see if a thread is still alive. */ |
| |
| #define target_thread_alive(ptid) \ |
| (*current_target.to_thread_alive) (ptid) |
| |
| /* Query for new threads and add them to the thread list. */ |
| |
| #define target_find_new_threads() \ |
| (*current_target.to_find_new_threads) (); \ |
| |
| /* Make target stop in a continuable fashion. (For instance, under |
| Unix, this should act like SIGSTOP). This function is normally |
| used by GUIs to implement a stop button. */ |
| |
| #define target_stop current_target.to_stop |
| |
| /* Send the specified COMMAND to the target's monitor |
| (shell,interpreter) for execution. The result of the query is |
| placed in OUTBUF. */ |
| |
| #define target_rcmd(command, outbuf) \ |
| (*current_target.to_rcmd) (command, outbuf) |
| |
| |
| /* Get the symbol information for a breakpointable routine called when |
| an exception event occurs. |
| Intended mainly for C++, and for those |
| platforms/implementations where such a callback mechanism is available, |
| e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support |
| different mechanisms for debugging exceptions. */ |
| |
| #define target_enable_exception_callback(kind, enable) \ |
| (*current_target.to_enable_exception_callback) (kind, enable) |
| |
| /* Get the current exception event kind -- throw or catch, etc. */ |
| |
| #define target_get_current_exception_event() \ |
| (*current_target.to_get_current_exception_event) () |
| |
| /* Does the target include all of memory, or only part of it? This |
| determines whether we look up the target chain for other parts of |
| memory if this target can't satisfy a request. */ |
| |
| #define target_has_all_memory \ |
| (current_target.to_has_all_memory) |
| |
| /* Does the target include memory? (Dummy targets don't.) */ |
| |
| #define target_has_memory \ |
| (current_target.to_has_memory) |
| |
| /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until |
| we start a process.) */ |
| |
| #define target_has_stack \ |
| (current_target.to_has_stack) |
| |
| /* Does the target have registers? (Exec files don't.) */ |
| |
| #define target_has_registers \ |
| (current_target.to_has_registers) |
| |
| /* Does the target have execution? Can we make it jump (through |
| hoops), or pop its stack a few times? FIXME: If this is to work that |
| way, it needs to check whether an inferior actually exists. |
| remote-udi.c and probably other targets can be the current target |
| when the inferior doesn't actually exist at the moment. Right now |
| this just tells us whether this target is *capable* of execution. */ |
| |
| #define target_has_execution \ |
| (current_target.to_has_execution) |
| |
| /* Can the target support the debugger control of thread execution? |
| a) Can it lock the thread scheduler? |
| b) Can it switch the currently running thread? */ |
| |
| #define target_can_lock_scheduler \ |
| (current_target.to_has_thread_control & tc_schedlock) |
| |
| #define target_can_switch_threads \ |
| (current_target.to_has_thread_control & tc_switch) |
| |
| /* Can the target support asynchronous execution? */ |
| #define target_can_async_p() (current_target.to_can_async_p ()) |
| |
| /* Is the target in asynchronous execution mode? */ |
| #define target_is_async_p() (current_target.to_is_async_p()) |
| |
| /* Put the target in async mode with the specified callback function. */ |
| #define target_async(CALLBACK,CONTEXT) \ |
| (current_target.to_async((CALLBACK), (CONTEXT))) |
| |
| /* This is to be used ONLY within call_function_by_hand(). It provides |
| a workaround, to have inferior function calls done in sychronous |
| mode, even though the target is asynchronous. After |
| target_async_mask(0) is called, calls to target_can_async_p() will |
| return FALSE , so that target_resume() will not try to start the |
| target asynchronously. After the inferior stops, we IMMEDIATELY |
| restore the previous nature of the target, by calling |
| target_async_mask(1). After that, target_can_async_p() will return |
| TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. |
| |
| FIXME ezannoni 1999-12-13: we won't need this once we move |
| the turning async on and off to the single execution commands, |
| from where it is done currently, in remote_resume(). */ |
| |
| #define target_async_mask_value \ |
| (current_target.to_async_mask_value) |
| |
| extern int target_async_mask (int mask); |
| |
| /* Converts a process id to a string. Usually, the string just contains |
| `process xyz', but on some systems it may contain |
| `process xyz thread abc'. */ |
| |
| #undef target_pid_to_str |
| #define target_pid_to_str(PID) current_target.to_pid_to_str (PID) |
| |
| #ifndef target_tid_to_str |
| #define target_tid_to_str(PID) \ |
| target_pid_to_str (PID) |
| extern char *normal_pid_to_str (ptid_t ptid); |
| #endif |
| |
| /* Return a short string describing extra information about PID, |
| e.g. "sleeping", "runnable", "running on LWP 3". Null return value |
| is okay. */ |
| |
| #define target_extra_thread_info(TP) \ |
| (current_target.to_extra_thread_info (TP)) |
| |
| /* |
| * New Objfile Event Hook: |
| * |
| * Sometimes a GDB component wants to get notified whenever a new |
| * objfile is loaded. Mainly this is used by thread-debugging |
| * implementations that need to know when symbols for the target |
| * thread implemenation are available. |
| * |
| * The old way of doing this is to define a macro 'target_new_objfile' |
| * that points to the function that you want to be called on every |
| * objfile/shlib load. |
| |
| The new way is to grab the function pointer, |
| 'deprecated_target_new_objfile_hook', and point it to the function |
| that you want to be called on every objfile/shlib load. |
| |
| If multiple clients are willing to be cooperative, they can each |
| save a pointer to the previous value of |
| deprecated_target_new_objfile_hook before modifying it, and arrange |
| for their function to call the previous function in the chain. In |
| that way, multiple clients can receive this notification (something |
| like with signal handlers). */ |
| |
| extern void (*deprecated_target_new_objfile_hook) (struct objfile *); |
| |
| #ifndef target_pid_or_tid_to_str |
| #define target_pid_or_tid_to_str(ID) \ |
| target_pid_to_str (ID) |
| #endif |
| |
| /* Attempts to find the pathname of the executable file |
| that was run to create a specified process. |
| |
| The process PID must be stopped when this operation is used. |
| |
| If the executable file cannot be determined, NULL is returned. |
| |
| Else, a pointer to a character string containing the pathname |
| is returned. This string should be copied into a buffer by |
| the client if the string will not be immediately used, or if |
| it must persist. */ |
| |
| #define target_pid_to_exec_file(pid) \ |
| (current_target.to_pid_to_exec_file) (pid) |
| |
| /* |
| * Iterator function for target memory regions. |
| * Calls a callback function once for each memory region 'mapped' |
| * in the child process. Defined as a simple macro rather than |
| * as a function macro so that it can be tested for nullity. |
| */ |
| |
| #define target_find_memory_regions(FUNC, DATA) \ |
| (current_target.to_find_memory_regions) (FUNC, DATA) |
| |
| /* |
| * Compose corefile .note section. |
| */ |
| |
| #define target_make_corefile_notes(BFD, SIZE_P) \ |
| (current_target.to_make_corefile_notes) (BFD, SIZE_P) |
| |
| /* Thread-local values. */ |
| #define target_get_thread_local_address \ |
| (current_target.to_get_thread_local_address) |
| #define target_get_thread_local_address_p() \ |
| (target_get_thread_local_address != NULL) |
| |
| /* Hook to call target dependent code just after inferior target process has |
| started. */ |
| |
| #ifndef TARGET_CREATE_INFERIOR_HOOK |
| #define TARGET_CREATE_INFERIOR_HOOK(PID) |
| #endif |
| |
| /* Hardware watchpoint interfaces. */ |
| |
| /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or |
| write). */ |
| |
| #ifndef STOPPED_BY_WATCHPOINT |
| #define STOPPED_BY_WATCHPOINT(w) \ |
| (*current_target.to_stopped_by_watchpoint) () |
| #endif |
| |
| /* Non-zero if we have continuable watchpoints */ |
| |
| #ifndef HAVE_CONTINUABLE_WATCHPOINT |
| #define HAVE_CONTINUABLE_WATCHPOINT \ |
| (current_target.to_have_continuable_watchpoint) |
| #endif |
| |
| /* Provide defaults for hardware watchpoint functions. */ |
| |
| /* If the *_hw_beakpoint functions have not been defined |
| elsewhere use the definitions in the target vector. */ |
| |
| /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is |
| one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or |
| bp_hardware_breakpoint. CNT is the number of such watchpoints used so far |
| (including this one?). OTHERTYPE is who knows what... */ |
| |
| #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT |
| #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \ |
| (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE); |
| #endif |
| |
| #ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT |
| #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \ |
| (*current_target.to_region_ok_for_hw_watchpoint) (addr, len) |
| #endif |
| |
| |
| /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 |
| for write, 1 for read, and 2 for read/write accesses. Returns 0 for |
| success, non-zero for failure. */ |
| |
| #ifndef target_insert_watchpoint |
| #define target_insert_watchpoint(addr, len, type) \ |
| (*current_target.to_insert_watchpoint) (addr, len, type) |
| |
| #define target_remove_watchpoint(addr, len, type) \ |
| (*current_target.to_remove_watchpoint) (addr, len, type) |
| #endif |
| |
| #ifndef target_insert_hw_breakpoint |
| #define target_insert_hw_breakpoint(bp_tgt) \ |
| (*current_target.to_insert_hw_breakpoint) (bp_tgt) |
| |
| #define target_remove_hw_breakpoint(bp_tgt) \ |
| (*current_target.to_remove_hw_breakpoint) (bp_tgt) |
| #endif |
| |
| extern int target_stopped_data_address_p (struct target_ops *); |
| |
| #ifndef target_stopped_data_address |
| #define target_stopped_data_address(target, x) \ |
| (*target.to_stopped_data_address) (target, x) |
| #else |
| /* Horrible hack to get around existing macros :-(. */ |
| #define target_stopped_data_address_p(CURRENT_TARGET) (1) |
| #endif |
| |
| /* This will only be defined by a target that supports catching vfork events, |
| such as HP-UX. |
| |
| On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked |
| child process after it has exec'd, causes the parent process to resume as |
| well. To prevent the parent from running spontaneously, such targets should |
| define this to a function that prevents that from happening. */ |
| #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED) |
| #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0) |
| #endif |
| |
| /* This will only be defined by a target that supports catching vfork events, |
| such as HP-UX. |
| |
| On some targets (such as HP-UX 10.20 and earlier), a newly vforked child |
| process must be resumed when it delivers its exec event, before the parent |
| vfork event will be delivered to us. */ |
| |
| #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK) |
| #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0) |
| #endif |
| |
| /* Routines for maintenance of the target structures... |
| |
| add_target: Add a target to the list of all possible targets. |
| |
| push_target: Make this target the top of the stack of currently used |
| targets, within its particular stratum of the stack. Result |
| is 0 if now atop the stack, nonzero if not on top (maybe |
| should warn user). |
| |
| unpush_target: Remove this from the stack of currently used targets, |
| no matter where it is on the list. Returns 0 if no |
| change, 1 if removed from stack. |
| |
| pop_target: Remove the top thing on the stack of current targets. */ |
| |
| extern void add_target (struct target_ops *); |
| |
| extern int push_target (struct target_ops *); |
| |
| extern int unpush_target (struct target_ops *); |
| |
| extern void target_preopen (int); |
| |
| extern void pop_target (void); |
| |
| /* Struct section_table maps address ranges to file sections. It is |
| mostly used with BFD files, but can be used without (e.g. for handling |
| raw disks, or files not in formats handled by BFD). */ |
| |
| struct section_table |
| { |
| CORE_ADDR addr; /* Lowest address in section */ |
| CORE_ADDR endaddr; /* 1+highest address in section */ |
| |
| struct bfd_section *the_bfd_section; |
| |
| bfd *bfd; /* BFD file pointer */ |
| }; |
| |
| /* Return the "section" containing the specified address. */ |
| struct section_table *target_section_by_addr (struct target_ops *target, |
| CORE_ADDR addr); |
| |
| |
| /* From mem-break.c */ |
| |
| extern int memory_remove_breakpoint (struct bp_target_info *); |
| |
| extern int memory_insert_breakpoint (struct bp_target_info *); |
| |
| extern int default_memory_remove_breakpoint (struct bp_target_info *); |
| |
| extern int default_memory_insert_breakpoint (struct bp_target_info *); |
| |
| |
| /* From target.c */ |
| |
| extern void initialize_targets (void); |
| |
| extern void noprocess (void); |
| |
| extern void find_default_attach (char *, int); |
| |
| extern void find_default_create_inferior (char *, char *, char **, int); |
| |
| extern struct target_ops *find_run_target (void); |
| |
| extern struct target_ops *find_core_target (void); |
| |
| extern struct target_ops *find_target_beneath (struct target_ops *); |
| |
| extern int target_resize_to_sections (struct target_ops *target, |
| int num_added); |
| |
| extern void remove_target_sections (bfd *abfd); |
| |
| |
| /* Stuff that should be shared among the various remote targets. */ |
| |
| /* Debugging level. 0 is off, and non-zero values mean to print some debug |
| information (higher values, more information). */ |
| extern int remote_debug; |
| |
| /* Speed in bits per second, or -1 which means don't mess with the speed. */ |
| extern int baud_rate; |
| /* Timeout limit for response from target. */ |
| extern int remote_timeout; |
| |
| |
| /* Functions for helping to write a native target. */ |
| |
| /* This is for native targets which use a unix/POSIX-style waitstatus. */ |
| extern void store_waitstatus (struct target_waitstatus *, int); |
| |
| /* Predicate to target_signal_to_host(). Return non-zero if the enum |
| targ_signal SIGNO has an equivalent ``host'' representation. */ |
| /* FIXME: cagney/1999-11-22: The name below was chosen in preference |
| to the shorter target_signal_p() because it is far less ambigious. |
| In this context ``target_signal'' refers to GDB's internal |
| representation of the target's set of signals while ``host signal'' |
| refers to the target operating system's signal. Confused? */ |
| |
| extern int target_signal_to_host_p (enum target_signal signo); |
| |
| /* Convert between host signal numbers and enum target_signal's. |
| target_signal_to_host() returns 0 and prints a warning() on GDB's |
| console if SIGNO has no equivalent host representation. */ |
| /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is |
| refering to the target operating system's signal numbering. |
| Similarly, ``enum target_signal'' is named incorrectly, ``enum |
| gdb_signal'' would probably be better as it is refering to GDB's |
| internal representation of a target operating system's signal. */ |
| |
| extern enum target_signal target_signal_from_host (int); |
| extern int target_signal_to_host (enum target_signal); |
| |
| /* Convert from a number used in a GDB command to an enum target_signal. */ |
| extern enum target_signal target_signal_from_command (int); |
| |
| /* Any target can call this to switch to remote protocol (in remote.c). */ |
| extern void push_remote_target (char *name, int from_tty); |
| |
| /* Imported from machine dependent code */ |
| |
| /* Blank target vector entries are initialized to target_ignore. */ |
| void target_ignore (void); |
| |
| extern struct target_ops deprecated_child_ops; |
| |
| #endif /* !defined (TARGET_H) */ |