1 /* Interface between GDB and target environments, including files and processes
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by John Gilmore.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #if !defined (TARGET_H)
30 struct bp_target_info;
32 struct target_section_table;
33 struct trace_state_variable;
37 struct static_tracepoint_marker;
38 struct traceframe_info;
41 /* This include file defines the interface between the main part
42 of the debugger, and the part which is target-specific, or
43 specific to the communications interface between us and the
46 A TARGET is an interface between the debugger and a particular
47 kind of file or process. Targets can be STACKED in STRATA,
48 so that more than one target can potentially respond to a request.
49 In particular, memory accesses will walk down the stack of targets
50 until they find a target that is interested in handling that particular
51 address. STRATA are artificial boundaries on the stack, within
52 which particular kinds of targets live. Strata exist so that
53 people don't get confused by pushing e.g. a process target and then
54 a file target, and wondering why they can't see the current values
55 of variables any more (the file target is handling them and they
56 never get to the process target). So when you push a file target,
57 it goes into the file stratum, which is always below the process
64 #include "gdb_signals.h"
68 dummy_stratum, /* The lowest of the low */
69 file_stratum, /* Executable files, etc */
70 process_stratum, /* Executing processes or core dump files */
71 thread_stratum, /* Executing threads */
72 record_stratum, /* Support record debugging */
73 arch_stratum /* Architecture overrides */
76 enum thread_control_capabilities
78 tc_none = 0, /* Default: can't control thread execution. */
79 tc_schedlock = 1, /* Can lock the thread scheduler. */
82 /* Stuff for target_wait. */
84 /* Generally, what has the program done? */
87 /* The program has exited. The exit status is in value.integer. */
88 TARGET_WAITKIND_EXITED,
90 /* The program has stopped with a signal. Which signal is in
92 TARGET_WAITKIND_STOPPED,
94 /* The program has terminated with a signal. Which signal is in
96 TARGET_WAITKIND_SIGNALLED,
98 /* The program is letting us know that it dynamically loaded something
99 (e.g. it called load(2) on AIX). */
100 TARGET_WAITKIND_LOADED,
102 /* The program has forked. A "related" process' PTID is in
103 value.related_pid. I.e., if the child forks, value.related_pid
104 is the parent's ID. */
106 TARGET_WAITKIND_FORKED,
108 /* The program has vforked. A "related" process's PTID is in
109 value.related_pid. */
111 TARGET_WAITKIND_VFORKED,
113 /* The program has exec'ed a new executable file. The new file's
114 pathname is pointed to by value.execd_pathname. */
116 TARGET_WAITKIND_EXECD,
118 /* The program had previously vforked, and now the child is done
119 with the shared memory region, because it exec'ed or exited.
120 Note that the event is reported to the vfork parent. This is
121 only used if GDB did not stay attached to the vfork child,
122 otherwise, a TARGET_WAITKIND_EXECD or
123 TARGET_WAITKIND_EXIT|SIGNALLED event associated with the child
124 has the same effect. */
125 TARGET_WAITKIND_VFORK_DONE,
127 /* The program has entered or returned from a system call. On
128 HP-UX, this is used in the hardware watchpoint implementation.
129 The syscall's unique integer ID number is in value.syscall_id. */
131 TARGET_WAITKIND_SYSCALL_ENTRY,
132 TARGET_WAITKIND_SYSCALL_RETURN,
134 /* Nothing happened, but we stopped anyway. This perhaps should be handled
135 within target_wait, but I'm not sure target_wait should be resuming the
137 TARGET_WAITKIND_SPURIOUS,
139 /* An event has occured, but we should wait again.
140 Remote_async_wait() returns this when there is an event
141 on the inferior, but the rest of the world is not interested in
142 it. The inferior has not stopped, but has just sent some output
143 to the console, for instance. In this case, we want to go back
144 to the event loop and wait there for another event from the
145 inferior, rather than being stuck in the remote_async_wait()
146 function. sThis way the event loop is responsive to other events,
147 like for instance the user typing. */
148 TARGET_WAITKIND_IGNORE,
150 /* The target has run out of history information,
151 and cannot run backward any further. */
152 TARGET_WAITKIND_NO_HISTORY,
154 /* There are no resumed children left in the program. */
155 TARGET_WAITKIND_NO_RESUMED
158 struct target_waitstatus
160 enum target_waitkind kind;
162 /* Forked child pid, execd pathname, exit status, signal number or
169 char *execd_pathname;
175 /* Options that can be passed to target_wait. */
177 /* Return immediately if there's no event already queued. If this
178 options is not requested, target_wait blocks waiting for an
180 #define TARGET_WNOHANG 1
182 /* The structure below stores information about a system call.
183 It is basically used in the "catch syscall" command, and in
184 every function that gives information about a system call.
186 It's also good to mention that its fields represent everything
187 that we currently know about a syscall in GDB. */
190 /* The syscall number. */
193 /* The syscall name. */
197 /* Return a pretty printed form of target_waitstatus.
198 Space for the result is malloc'd, caller must free. */
199 extern char *target_waitstatus_to_string (const struct target_waitstatus *);
201 /* Return a pretty printed form of TARGET_OPTIONS.
202 Space for the result is malloc'd, caller must free. */
203 extern char *target_options_to_string (int target_options);
205 /* Possible types of events that the inferior handler will have to
207 enum inferior_event_type
209 /* Process a normal inferior event which will result in target_wait
212 /* We are called because a timer went off. */
214 /* We are called to do stuff after the inferior stops. */
216 /* We are called to do some stuff after the inferior stops, but we
217 are expected to reenter the proceed() and
218 handle_inferior_event() functions. This is used only in case of
219 'step n' like commands. */
223 /* Target objects which can be transfered using target_read,
224 target_write, et cetera. */
228 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
230 /* SPU target specific transfer. See "spu-tdep.c". */
232 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
233 TARGET_OBJECT_MEMORY,
234 /* Memory, avoiding GDB's data cache and trusting the executable.
235 Target implementations of to_xfer_partial never need to handle
236 this object, and most callers should not use it. */
237 TARGET_OBJECT_RAW_MEMORY,
238 /* Memory known to be part of the target's stack. This is cached even
239 if it is not in a region marked as such, since it is known to be
241 TARGET_OBJECT_STACK_MEMORY,
242 /* Kernel Unwind Table. See "ia64-tdep.c". */
243 TARGET_OBJECT_UNWIND_TABLE,
244 /* Transfer auxilliary vector. */
246 /* StackGhost cookie. See "sparc-tdep.c". */
247 TARGET_OBJECT_WCOOKIE,
248 /* Target memory map in XML format. */
249 TARGET_OBJECT_MEMORY_MAP,
250 /* Flash memory. This object can be used to write contents to
251 a previously erased flash memory. Using it without erasing
252 flash can have unexpected results. Addresses are physical
253 address on target, and not relative to flash start. */
255 /* Available target-specific features, e.g. registers and coprocessors.
256 See "target-descriptions.c". ANNEX should never be empty. */
257 TARGET_OBJECT_AVAILABLE_FEATURES,
258 /* Currently loaded libraries, in XML format. */
259 TARGET_OBJECT_LIBRARIES,
260 /* Currently loaded libraries specific for SVR4 systems, in XML format. */
261 TARGET_OBJECT_LIBRARIES_SVR4,
262 /* Get OS specific data. The ANNEX specifies the type (running
263 processes, etc.). The data being transfered is expected to follow
264 the DTD specified in features/osdata.dtd. */
265 TARGET_OBJECT_OSDATA,
266 /* Extra signal info. Usually the contents of `siginfo_t' on unix
268 TARGET_OBJECT_SIGNAL_INFO,
269 /* The list of threads that are being debugged. */
270 TARGET_OBJECT_THREADS,
271 /* Collected static trace data. */
272 TARGET_OBJECT_STATIC_TRACE_DATA,
273 /* The HP-UX registers (those that can be obtained or modified by using
274 the TT_LWP_RUREGS/TT_LWP_WUREGS ttrace requests). */
275 TARGET_OBJECT_HPUX_UREGS,
276 /* The HP-UX shared library linkage pointer. ANNEX should be a string
277 image of the code address whose linkage pointer we are looking for.
279 The size of the data transfered is always 8 bytes (the size of an
281 TARGET_OBJECT_HPUX_SOLIB_GOT,
282 /* Traceframe info, in XML format. */
283 TARGET_OBJECT_TRACEFRAME_INFO,
284 /* Load maps for FDPIC systems. */
286 /* Darwin dynamic linker info data. */
287 TARGET_OBJECT_DARWIN_DYLD_INFO,
288 /* OpenVMS Unwind Information Block. */
289 TARGET_OBJECT_OPENVMS_UIB
290 /* Possible future objects: TARGET_OBJECT_FILE, ... */
293 /* Enumeration of the kinds of traceframe searches that a target may
294 be able to perform. */
305 typedef struct static_tracepoint_marker *static_tracepoint_marker_p;
306 DEF_VEC_P(static_tracepoint_marker_p);
308 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
309 OBJECT. The OFFSET, for a seekable object, specifies the
310 starting point. The ANNEX can be used to provide additional
311 data-specific information to the target.
313 Return the number of bytes actually transfered, or -1 if the
314 transfer is not supported or otherwise fails. Return of a positive
315 value less than LEN indicates that no further transfer is possible.
316 Unlike the raw to_xfer_partial interface, callers of these
317 functions do not need to retry partial transfers. */
319 extern LONGEST target_read (struct target_ops *ops,
320 enum target_object object,
321 const char *annex, gdb_byte *buf,
322 ULONGEST offset, LONGEST len);
324 struct memory_read_result
326 /* First address that was read. */
328 /* Past-the-end address. */
333 typedef struct memory_read_result memory_read_result_s;
334 DEF_VEC_O(memory_read_result_s);
336 extern void free_memory_read_result_vector (void *);
338 extern VEC(memory_read_result_s)* read_memory_robust (struct target_ops *ops,
342 extern LONGEST target_write (struct target_ops *ops,
343 enum target_object object,
344 const char *annex, const gdb_byte *buf,
345 ULONGEST offset, LONGEST len);
347 /* Similar to target_write, except that it also calls PROGRESS with
348 the number of bytes written and the opaque BATON after every
349 successful partial write (and before the first write). This is
350 useful for progress reporting and user interaction while writing
351 data. To abort the transfer, the progress callback can throw an
354 LONGEST target_write_with_progress (struct target_ops *ops,
355 enum target_object object,
356 const char *annex, const gdb_byte *buf,
357 ULONGEST offset, LONGEST len,
358 void (*progress) (ULONGEST, void *),
361 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
362 be read using OPS. The return value will be -1 if the transfer
363 fails or is not supported; 0 if the object is empty; or the length
364 of the object otherwise. If a positive value is returned, a
365 sufficiently large buffer will be allocated using xmalloc and
366 returned in *BUF_P containing the contents of the object.
368 This method should be used for objects sufficiently small to store
369 in a single xmalloc'd buffer, when no fixed bound on the object's
370 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
371 through this function. */
373 extern LONGEST target_read_alloc (struct target_ops *ops,
374 enum target_object object,
375 const char *annex, gdb_byte **buf_p);
377 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
378 returned as a string, allocated using xmalloc. If an error occurs
379 or the transfer is unsupported, NULL is returned. Empty objects
380 are returned as allocated but empty strings. A warning is issued
381 if the result contains any embedded NUL bytes. */
383 extern char *target_read_stralloc (struct target_ops *ops,
384 enum target_object object,
387 /* Wrappers to target read/write that perform memory transfers. They
388 throw an error if the memory transfer fails.
390 NOTE: cagney/2003-10-23: The naming schema is lifted from
391 "frame.h". The parameter order is lifted from get_frame_memory,
392 which in turn lifted it from read_memory. */
394 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
395 gdb_byte *buf, LONGEST len);
396 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
397 CORE_ADDR addr, int len,
398 enum bfd_endian byte_order);
400 struct thread_info; /* fwd decl for parameter list below: */
404 struct target_ops *beneath; /* To the target under this one. */
405 char *to_shortname; /* Name this target type */
406 char *to_longname; /* Name for printing */
407 char *to_doc; /* Documentation. Does not include trailing
408 newline, and starts with a one-line descrip-
409 tion (probably similar to to_longname). */
410 /* Per-target scratch pad. */
412 /* The open routine takes the rest of the parameters from the
413 command, and (if successful) pushes a new target onto the
414 stack. Targets should supply this routine, if only to provide
416 void (*to_open) (char *, int);
417 /* Old targets with a static target vector provide "to_close".
418 New re-entrant targets provide "to_xclose" and that is expected
419 to xfree everything (including the "struct target_ops"). */
420 void (*to_xclose) (struct target_ops *targ, int quitting);
421 void (*to_close) (int);
422 void (*to_attach) (struct target_ops *ops, char *, int);
423 void (*to_post_attach) (int);
424 void (*to_detach) (struct target_ops *ops, char *, int);
425 void (*to_disconnect) (struct target_ops *, char *, int);
426 void (*to_resume) (struct target_ops *, ptid_t, int, enum gdb_signal);
427 ptid_t (*to_wait) (struct target_ops *,
428 ptid_t, struct target_waitstatus *, int);
429 void (*to_fetch_registers) (struct target_ops *, struct regcache *, int);
430 void (*to_store_registers) (struct target_ops *, struct regcache *, int);
431 void (*to_prepare_to_store) (struct regcache *);
433 /* Transfer LEN bytes of memory between GDB address MYADDR and
434 target address MEMADDR. If WRITE, transfer them to the target, else
435 transfer them from the target. TARGET is the target from which we
438 Return value, N, is one of the following:
440 0 means that we can't handle this. If errno has been set, it is the
441 error which prevented us from doing it (FIXME: What about bfd_error?).
443 positive (call it N) means that we have transferred N bytes
444 starting at MEMADDR. We might be able to handle more bytes
445 beyond this length, but no promises.
447 negative (call its absolute value N) means that we cannot
448 transfer right at MEMADDR, but we could transfer at least
449 something at MEMADDR + N.
451 NOTE: cagney/2004-10-01: This has been entirely superseeded by
452 to_xfer_partial and inferior inheritance. */
454 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
456 struct mem_attrib *attrib,
457 struct target_ops *target);
459 void (*to_files_info) (struct target_ops *);
460 int (*to_insert_breakpoint) (struct gdbarch *, struct bp_target_info *);
461 int (*to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *);
462 int (*to_can_use_hw_breakpoint) (int, int, int);
463 int (*to_ranged_break_num_registers) (struct target_ops *);
464 int (*to_insert_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
465 int (*to_remove_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
467 /* Documentation of what the two routines below are expected to do is
468 provided with the corresponding target_* macros. */
469 int (*to_remove_watchpoint) (CORE_ADDR, int, int, struct expression *);
470 int (*to_insert_watchpoint) (CORE_ADDR, int, int, struct expression *);
472 int (*to_insert_mask_watchpoint) (struct target_ops *,
473 CORE_ADDR, CORE_ADDR, int);
474 int (*to_remove_mask_watchpoint) (struct target_ops *,
475 CORE_ADDR, CORE_ADDR, int);
476 int (*to_stopped_by_watchpoint) (void);
477 int to_have_steppable_watchpoint;
478 int to_have_continuable_watchpoint;
479 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
480 int (*to_watchpoint_addr_within_range) (struct target_ops *,
481 CORE_ADDR, CORE_ADDR, int);
483 /* Documentation of this routine is provided with the corresponding
485 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
487 int (*to_can_accel_watchpoint_condition) (CORE_ADDR, int, int,
488 struct expression *);
489 int (*to_masked_watch_num_registers) (struct target_ops *,
490 CORE_ADDR, CORE_ADDR);
491 void (*to_terminal_init) (void);
492 void (*to_terminal_inferior) (void);
493 void (*to_terminal_ours_for_output) (void);
494 void (*to_terminal_ours) (void);
495 void (*to_terminal_save_ours) (void);
496 void (*to_terminal_info) (char *, int);
497 void (*to_kill) (struct target_ops *);
498 void (*to_load) (char *, int);
499 void (*to_create_inferior) (struct target_ops *,
500 char *, char *, char **, int);
501 void (*to_post_startup_inferior) (ptid_t);
502 int (*to_insert_fork_catchpoint) (int);
503 int (*to_remove_fork_catchpoint) (int);
504 int (*to_insert_vfork_catchpoint) (int);
505 int (*to_remove_vfork_catchpoint) (int);
506 int (*to_follow_fork) (struct target_ops *, int);
507 int (*to_insert_exec_catchpoint) (int);
508 int (*to_remove_exec_catchpoint) (int);
509 int (*to_set_syscall_catchpoint) (int, int, int, int, int *);
510 int (*to_has_exited) (int, int, int *);
511 void (*to_mourn_inferior) (struct target_ops *);
512 int (*to_can_run) (void);
514 /* Documentation of this routine is provided with the corresponding
516 void (*to_pass_signals) (int, unsigned char *);
518 /* Documentation of this routine is provided with the
519 corresponding target_* function. */
520 void (*to_program_signals) (int, unsigned char *);
522 int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
523 void (*to_find_new_threads) (struct target_ops *);
524 char *(*to_pid_to_str) (struct target_ops *, ptid_t);
525 char *(*to_extra_thread_info) (struct thread_info *);
526 char *(*to_thread_name) (struct thread_info *);
527 void (*to_stop) (ptid_t);
528 void (*to_rcmd) (char *command, struct ui_file *output);
529 char *(*to_pid_to_exec_file) (int pid);
530 void (*to_log_command) (const char *);
531 struct target_section_table *(*to_get_section_table) (struct target_ops *);
532 enum strata to_stratum;
533 int (*to_has_all_memory) (struct target_ops *);
534 int (*to_has_memory) (struct target_ops *);
535 int (*to_has_stack) (struct target_ops *);
536 int (*to_has_registers) (struct target_ops *);
537 int (*to_has_execution) (struct target_ops *, ptid_t);
538 int to_has_thread_control; /* control thread execution */
539 int to_attach_no_wait;
540 /* ASYNC target controls */
541 int (*to_can_async_p) (void);
542 int (*to_is_async_p) (void);
543 void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
544 int (*to_supports_non_stop) (void);
545 /* find_memory_regions support method for gcore */
546 int (*to_find_memory_regions) (find_memory_region_ftype func, void *data);
547 /* make_corefile_notes support method for gcore */
548 char * (*to_make_corefile_notes) (bfd *, int *);
549 /* get_bookmark support method for bookmarks */
550 gdb_byte * (*to_get_bookmark) (char *, int);
551 /* goto_bookmark support method for bookmarks */
552 void (*to_goto_bookmark) (gdb_byte *, int);
553 /* Return the thread-local address at OFFSET in the
554 thread-local storage for the thread PTID and the shared library
555 or executable file given by OBJFILE. If that block of
556 thread-local storage hasn't been allocated yet, this function
557 may return an error. */
558 CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
560 CORE_ADDR load_module_addr,
563 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
564 OBJECT. The OFFSET, for a seekable object, specifies the
565 starting point. The ANNEX can be used to provide additional
566 data-specific information to the target.
568 Return the number of bytes actually transfered, zero when no
569 further transfer is possible, and -1 when the transfer is not
570 supported. Return of a positive value smaller than LEN does
571 not indicate the end of the object, only the end of the
572 transfer; higher level code should continue transferring if
573 desired. This is handled in target.c.
575 The interface does not support a "retry" mechanism. Instead it
576 assumes that at least one byte will be transfered on each
579 NOTE: cagney/2003-10-17: The current interface can lead to
580 fragmented transfers. Lower target levels should not implement
581 hacks, such as enlarging the transfer, in an attempt to
582 compensate for this. Instead, the target stack should be
583 extended so that it implements supply/collect methods and a
584 look-aside object cache. With that available, the lowest
585 target can safely and freely "push" data up the stack.
587 See target_read and target_write for more information. One,
588 and only one, of readbuf or writebuf must be non-NULL. */
590 LONGEST (*to_xfer_partial) (struct target_ops *ops,
591 enum target_object object, const char *annex,
592 gdb_byte *readbuf, const gdb_byte *writebuf,
593 ULONGEST offset, LONGEST len);
595 /* Returns the memory map for the target. A return value of NULL
596 means that no memory map is available. If a memory address
597 does not fall within any returned regions, it's assumed to be
598 RAM. The returned memory regions should not overlap.
600 The order of regions does not matter; target_memory_map will
601 sort regions by starting address. For that reason, this
602 function should not be called directly except via
605 This method should not cache data; if the memory map could
606 change unexpectedly, it should be invalidated, and higher
607 layers will re-fetch it. */
608 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
610 /* Erases the region of flash memory starting at ADDRESS, of
613 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
614 on flash block boundaries, as reported by 'to_memory_map'. */
615 void (*to_flash_erase) (struct target_ops *,
616 ULONGEST address, LONGEST length);
618 /* Finishes a flash memory write sequence. After this operation
619 all flash memory should be available for writing and the result
620 of reading from areas written by 'to_flash_write' should be
621 equal to what was written. */
622 void (*to_flash_done) (struct target_ops *);
624 /* Describe the architecture-specific features of this target.
625 Returns the description found, or NULL if no description
627 const struct target_desc *(*to_read_description) (struct target_ops *ops);
629 /* Build the PTID of the thread on which a given task is running,
630 based on LWP and THREAD. These values are extracted from the
631 task Private_Data section of the Ada Task Control Block, and
632 their interpretation depends on the target. */
633 ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
635 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
636 Return 0 if *READPTR is already at the end of the buffer.
637 Return -1 if there is insufficient buffer for a whole entry.
638 Return 1 if an entry was read into *TYPEP and *VALP. */
639 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
640 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
642 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
643 sequence of bytes in PATTERN with length PATTERN_LEN.
645 The result is 1 if found, 0 if not found, and -1 if there was an error
646 requiring halting of the search (e.g. memory read error).
647 If the pattern is found the address is recorded in FOUND_ADDRP. */
648 int (*to_search_memory) (struct target_ops *ops,
649 CORE_ADDR start_addr, ULONGEST search_space_len,
650 const gdb_byte *pattern, ULONGEST pattern_len,
651 CORE_ADDR *found_addrp);
653 /* Can target execute in reverse? */
654 int (*to_can_execute_reverse) (void);
656 /* The direction the target is currently executing. Must be
657 implemented on targets that support reverse execution and async
658 mode. The default simply returns forward execution. */
659 enum exec_direction_kind (*to_execution_direction) (void);
661 /* Does this target support debugging multiple processes
663 int (*to_supports_multi_process) (void);
665 /* Does this target support enabling and disabling tracepoints while a trace
666 experiment is running? */
667 int (*to_supports_enable_disable_tracepoint) (void);
669 /* Does this target support disabling address space randomization? */
670 int (*to_supports_disable_randomization) (void);
672 /* Does this target support the tracenz bytecode for string collection? */
673 int (*to_supports_string_tracing) (void);
675 /* Does this target support evaluation of breakpoint conditions on its
677 int (*to_supports_evaluation_of_breakpoint_conditions) (void);
679 /* Does this target support evaluation of breakpoint commands on its
681 int (*to_can_run_breakpoint_commands) (void);
683 /* Determine current architecture of thread PTID.
685 The target is supposed to determine the architecture of the code where
686 the target is currently stopped at (on Cell, if a target is in spu_run,
687 to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
688 This is architecture used to perform decr_pc_after_break adjustment,
689 and also determines the frame architecture of the innermost frame.
690 ptrace operations need to operate according to target_gdbarch ().
692 The default implementation always returns target_gdbarch (). */
693 struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t);
695 /* Determine current address space of thread PTID.
697 The default implementation always returns the inferior's
699 struct address_space *(*to_thread_address_space) (struct target_ops *,
702 /* Target file operations. */
704 /* Open FILENAME on the target, using FLAGS and MODE. Return a
705 target file descriptor, or -1 if an error occurs (and set
707 int (*to_fileio_open) (const char *filename, int flags, int mode,
710 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
711 Return the number of bytes written, or -1 if an error occurs
712 (and set *TARGET_ERRNO). */
713 int (*to_fileio_pwrite) (int fd, const gdb_byte *write_buf, int len,
714 ULONGEST offset, int *target_errno);
716 /* Read up to LEN bytes FD on the target into READ_BUF.
717 Return the number of bytes read, or -1 if an error occurs
718 (and set *TARGET_ERRNO). */
719 int (*to_fileio_pread) (int fd, gdb_byte *read_buf, int len,
720 ULONGEST offset, int *target_errno);
722 /* Close FD on the target. Return 0, or -1 if an error occurs
723 (and set *TARGET_ERRNO). */
724 int (*to_fileio_close) (int fd, int *target_errno);
726 /* Unlink FILENAME on the target. Return 0, or -1 if an error
727 occurs (and set *TARGET_ERRNO). */
728 int (*to_fileio_unlink) (const char *filename, int *target_errno);
730 /* Read value of symbolic link FILENAME on the target. Return a
731 null-terminated string allocated via xmalloc, or NULL if an error
732 occurs (and set *TARGET_ERRNO). */
733 char *(*to_fileio_readlink) (const char *filename, int *target_errno);
736 /* Implement the "info proc" command. */
737 void (*to_info_proc) (struct target_ops *, char *, enum info_proc_what);
739 /* Tracepoint-related operations. */
741 /* Prepare the target for a tracing run. */
742 void (*to_trace_init) (void);
744 /* Send full details of a tracepoint location to the target. */
745 void (*to_download_tracepoint) (struct bp_location *location);
747 /* Is the target able to download tracepoint locations in current
749 int (*to_can_download_tracepoint) (void);
751 /* Send full details of a trace state variable to the target. */
752 void (*to_download_trace_state_variable) (struct trace_state_variable *tsv);
754 /* Enable a tracepoint on the target. */
755 void (*to_enable_tracepoint) (struct bp_location *location);
757 /* Disable a tracepoint on the target. */
758 void (*to_disable_tracepoint) (struct bp_location *location);
760 /* Inform the target info of memory regions that are readonly
761 (such as text sections), and so it should return data from
762 those rather than look in the trace buffer. */
763 void (*to_trace_set_readonly_regions) (void);
765 /* Start a trace run. */
766 void (*to_trace_start) (void);
768 /* Get the current status of a tracing run. */
769 int (*to_get_trace_status) (struct trace_status *ts);
771 void (*to_get_tracepoint_status) (struct breakpoint *tp,
772 struct uploaded_tp *utp);
774 /* Stop a trace run. */
775 void (*to_trace_stop) (void);
777 /* Ask the target to find a trace frame of the given type TYPE,
778 using NUM, ADDR1, and ADDR2 as search parameters. Returns the
779 number of the trace frame, and also the tracepoint number at
780 TPP. If no trace frame matches, return -1. May throw if the
782 int (*to_trace_find) (enum trace_find_type type, int num,
783 ULONGEST addr1, ULONGEST addr2, int *tpp);
785 /* Get the value of the trace state variable number TSV, returning
786 1 if the value is known and writing the value itself into the
787 location pointed to by VAL, else returning 0. */
788 int (*to_get_trace_state_variable_value) (int tsv, LONGEST *val);
790 int (*to_save_trace_data) (const char *filename);
792 int (*to_upload_tracepoints) (struct uploaded_tp **utpp);
794 int (*to_upload_trace_state_variables) (struct uploaded_tsv **utsvp);
796 LONGEST (*to_get_raw_trace_data) (gdb_byte *buf,
797 ULONGEST offset, LONGEST len);
799 /* Get the minimum length of instruction on which a fast tracepoint
800 may be set on the target. If this operation is unsupported,
801 return -1. If for some reason the minimum length cannot be
802 determined, return 0. */
803 int (*to_get_min_fast_tracepoint_insn_len) (void);
805 /* Set the target's tracing behavior in response to unexpected
806 disconnection - set VAL to 1 to keep tracing, 0 to stop. */
807 void (*to_set_disconnected_tracing) (int val);
808 void (*to_set_circular_trace_buffer) (int val);
810 /* Add/change textual notes about the trace run, returning 1 if
811 successful, 0 otherwise. */
812 int (*to_set_trace_notes) (char *user, char *notes, char* stopnotes);
814 /* Return the processor core that thread PTID was last seen on.
815 This information is updated only when:
816 - update_thread_list is called
818 If the core cannot be determined -- either for the specified
819 thread, or right now, or in this debug session, or for this
820 target -- return -1. */
821 int (*to_core_of_thread) (struct target_ops *, ptid_t ptid);
823 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range
824 matches the contents of [DATA,DATA+SIZE). Returns 1 if there's
825 a match, 0 if there's a mismatch, and -1 if an error is
826 encountered while reading memory. */
827 int (*to_verify_memory) (struct target_ops *, const gdb_byte *data,
828 CORE_ADDR memaddr, ULONGEST size);
830 /* Return the address of the start of the Thread Information Block
831 a Windows OS specific feature. */
832 int (*to_get_tib_address) (ptid_t ptid, CORE_ADDR *addr);
834 /* Send the new settings of write permission variables. */
835 void (*to_set_permissions) (void);
837 /* Look for a static tracepoint marker at ADDR, and fill in MARKER
838 with its details. Return 1 on success, 0 on failure. */
839 int (*to_static_tracepoint_marker_at) (CORE_ADDR,
840 struct static_tracepoint_marker *marker);
842 /* Return a vector of all tracepoints markers string id ID, or all
843 markers if ID is NULL. */
844 VEC(static_tracepoint_marker_p) *(*to_static_tracepoint_markers_by_strid)
847 /* Return a traceframe info object describing the current
848 traceframe's contents. This method should not cache data;
849 higher layers take care of caching, invalidating, and
850 re-fetching when necessary. */
851 struct traceframe_info *(*to_traceframe_info) (void);
853 /* Ask the target to use or not to use agent according to USE. Return 1
854 successful, 0 otherwise. */
855 int (*to_use_agent) (int use);
857 /* Is the target able to use agent in current state? */
858 int (*to_can_use_agent) (void);
861 /* Need sub-structure for target machine related rather than comm related?
865 /* Magic number for checking ops size. If a struct doesn't end with this
866 number, somebody changed the declaration but didn't change all the
867 places that initialize one. */
869 #define OPS_MAGIC 3840
871 /* The ops structure for our "current" target process. This should
872 never be NULL. If there is no target, it points to the dummy_target. */
874 extern struct target_ops current_target;
876 /* Define easy words for doing these operations on our current target. */
878 #define target_shortname (current_target.to_shortname)
879 #define target_longname (current_target.to_longname)
881 /* Does whatever cleanup is required for a target that we are no
882 longer going to be calling. QUITTING indicates that GDB is exiting
883 and should not get hung on an error (otherwise it is important to
884 perform clean termination, even if it takes a while). This routine
885 is automatically always called after popping the target off the
886 target stack - the target's own methods are no longer available
887 through the target vector. Closing file descriptors and freeing all
888 memory allocated memory are typical things it should do. */
890 void target_close (struct target_ops *targ, int quitting);
892 /* Attaches to a process on the target side. Arguments are as passed
893 to the `attach' command by the user. This routine can be called
894 when the target is not on the target-stack, if the target_can_run
895 routine returns 1; in that case, it must push itself onto the stack.
896 Upon exit, the target should be ready for normal operations, and
897 should be ready to deliver the status of the process immediately
898 (without waiting) to an upcoming target_wait call. */
900 void target_attach (char *, int);
902 /* Some targets don't generate traps when attaching to the inferior,
903 or their target_attach implementation takes care of the waiting.
904 These targets must set to_attach_no_wait. */
906 #define target_attach_no_wait \
907 (current_target.to_attach_no_wait)
909 /* The target_attach operation places a process under debugger control,
910 and stops the process.
912 This operation provides a target-specific hook that allows the
913 necessary bookkeeping to be performed after an attach completes. */
914 #define target_post_attach(pid) \
915 (*current_target.to_post_attach) (pid)
917 /* Takes a program previously attached to and detaches it.
918 The program may resume execution (some targets do, some don't) and will
919 no longer stop on signals, etc. We better not have left any breakpoints
920 in the program or it'll die when it hits one. ARGS is arguments
921 typed by the user (e.g. a signal to send the process). FROM_TTY
922 says whether to be verbose or not. */
924 extern void target_detach (char *, int);
926 /* Disconnect from the current target without resuming it (leaving it
927 waiting for a debugger). */
929 extern void target_disconnect (char *, int);
931 /* Resume execution of the target process PTID (or a group of
932 threads). STEP says whether to single-step or to run free; SIGGNAL
933 is the signal to be given to the target, or GDB_SIGNAL_0 for no
934 signal. The caller may not pass GDB_SIGNAL_DEFAULT. A specific
935 PTID means `step/resume only this process id'. A wildcard PTID
936 (all threads, or all threads of process) means `step/resume
937 INFERIOR_PTID, and let other threads (for which the wildcard PTID
938 matches) resume with their 'thread->suspend.stop_signal' signal
939 (usually GDB_SIGNAL_0) if it is in "pass" state, or with no signal
940 if in "no pass" state. */
942 extern void target_resume (ptid_t ptid, int step, enum gdb_signal signal);
944 /* Wait for process pid to do something. PTID = -1 to wait for any
945 pid to do something. Return pid of child, or -1 in case of error;
946 store status through argument pointer STATUS. Note that it is
947 _NOT_ OK to throw_exception() out of target_wait() without popping
948 the debugging target from the stack; GDB isn't prepared to get back
949 to the prompt with a debugging target but without the frame cache,
950 stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W*
953 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
956 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
958 extern void target_fetch_registers (struct regcache *regcache, int regno);
960 /* Store at least register REGNO, or all regs if REGNO == -1.
961 It can store as many registers as it wants to, so target_prepare_to_store
962 must have been previously called. Calls error() if there are problems. */
964 extern void target_store_registers (struct regcache *regcache, int regs);
966 /* Get ready to modify the registers array. On machines which store
967 individual registers, this doesn't need to do anything. On machines
968 which store all the registers in one fell swoop, this makes sure
969 that REGISTERS contains all the registers from the program being
972 #define target_prepare_to_store(regcache) \
973 (*current_target.to_prepare_to_store) (regcache)
975 /* Determine current address space of thread PTID. */
977 struct address_space *target_thread_address_space (ptid_t);
979 /* Implement the "info proc" command. This returns one if the request
980 was handled, and zero otherwise. It can also throw an exception if
981 an error was encountered while attempting to handle the
984 int target_info_proc (char *, enum info_proc_what);
986 /* Returns true if this target can debug multiple processes
989 #define target_supports_multi_process() \
990 (*current_target.to_supports_multi_process) ()
992 /* Returns true if this target can disable address space randomization. */
994 int target_supports_disable_randomization (void);
996 /* Returns true if this target can enable and disable tracepoints
997 while a trace experiment is running. */
999 #define target_supports_enable_disable_tracepoint() \
1000 (*current_target.to_supports_enable_disable_tracepoint) ()
1002 #define target_supports_string_tracing() \
1003 (*current_target.to_supports_string_tracing) ()
1005 /* Returns true if this target can handle breakpoint conditions
1008 #define target_supports_evaluation_of_breakpoint_conditions() \
1009 (*current_target.to_supports_evaluation_of_breakpoint_conditions) ()
1011 /* Returns true if this target can handle breakpoint commands
1014 #define target_can_run_breakpoint_commands() \
1015 (*current_target.to_can_run_breakpoint_commands) ()
1017 /* Invalidate all target dcaches. */
1018 extern void target_dcache_invalidate (void);
1020 extern int target_read_string (CORE_ADDR, char **, int, int *);
1022 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
1025 extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
1027 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
1030 extern int target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
1033 /* Fetches the target's memory map. If one is found it is sorted
1034 and returned, after some consistency checking. Otherwise, NULL
1036 VEC(mem_region_s) *target_memory_map (void);
1038 /* Erase the specified flash region. */
1039 void target_flash_erase (ULONGEST address, LONGEST length);
1041 /* Finish a sequence of flash operations. */
1042 void target_flash_done (void);
1044 /* Describes a request for a memory write operation. */
1045 struct memory_write_request
1047 /* Begining address that must be written. */
1049 /* Past-the-end address. */
1051 /* The data to write. */
1053 /* A callback baton for progress reporting for this request. */
1056 typedef struct memory_write_request memory_write_request_s;
1057 DEF_VEC_O(memory_write_request_s);
1059 /* Enumeration specifying different flash preservation behaviour. */
1060 enum flash_preserve_mode
1066 /* Write several memory blocks at once. This version can be more
1067 efficient than making several calls to target_write_memory, in
1068 particular because it can optimize accesses to flash memory.
1070 Moreover, this is currently the only memory access function in gdb
1071 that supports writing to flash memory, and it should be used for
1072 all cases where access to flash memory is desirable.
1074 REQUESTS is the vector (see vec.h) of memory_write_request.
1075 PRESERVE_FLASH_P indicates what to do with blocks which must be
1076 erased, but not completely rewritten.
1077 PROGRESS_CB is a function that will be periodically called to provide
1078 feedback to user. It will be called with the baton corresponding
1079 to the request currently being written. It may also be called
1080 with a NULL baton, when preserved flash sectors are being rewritten.
1082 The function returns 0 on success, and error otherwise. */
1083 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
1084 enum flash_preserve_mode preserve_flash_p,
1085 void (*progress_cb) (ULONGEST, void *));
1087 /* Print a line about the current target. */
1089 #define target_files_info() \
1090 (*current_target.to_files_info) (¤t_target)
1092 /* Insert a breakpoint at address BP_TGT->placed_address in the target
1093 machine. Result is 0 for success, or an errno value. */
1095 extern int target_insert_breakpoint (struct gdbarch *gdbarch,
1096 struct bp_target_info *bp_tgt);
1098 /* Remove a breakpoint at address BP_TGT->placed_address in the target
1099 machine. Result is 0 for success, or an errno value. */
1101 extern int target_remove_breakpoint (struct gdbarch *gdbarch,
1102 struct bp_target_info *bp_tgt);
1104 /* Initialize the terminal settings we record for the inferior,
1105 before we actually run the inferior. */
1107 #define target_terminal_init() \
1108 (*current_target.to_terminal_init) ()
1110 /* Put the inferior's terminal settings into effect.
1111 This is preparation for starting or resuming the inferior. */
1113 extern void target_terminal_inferior (void);
1115 /* Put some of our terminal settings into effect,
1116 enough to get proper results from our output,
1117 but do not change into or out of RAW mode
1118 so that no input is discarded.
1120 After doing this, either terminal_ours or terminal_inferior
1121 should be called to get back to a normal state of affairs. */
1123 #define target_terminal_ours_for_output() \
1124 (*current_target.to_terminal_ours_for_output) ()
1126 /* Put our terminal settings into effect.
1127 First record the inferior's terminal settings
1128 so they can be restored properly later. */
1130 #define target_terminal_ours() \
1131 (*current_target.to_terminal_ours) ()
1133 /* Save our terminal settings.
1134 This is called from TUI after entering or leaving the curses
1135 mode. Since curses modifies our terminal this call is here
1136 to take this change into account. */
1138 #define target_terminal_save_ours() \
1139 (*current_target.to_terminal_save_ours) ()
1141 /* Print useful information about our terminal status, if such a thing
1144 #define target_terminal_info(arg, from_tty) \
1145 (*current_target.to_terminal_info) (arg, from_tty)
1147 /* Kill the inferior process. Make it go away. */
1149 extern void target_kill (void);
1151 /* Load an executable file into the target process. This is expected
1152 to not only bring new code into the target process, but also to
1153 update GDB's symbol tables to match.
1155 ARG contains command-line arguments, to be broken down with
1156 buildargv (). The first non-switch argument is the filename to
1157 load, FILE; the second is a number (as parsed by strtoul (..., ...,
1158 0)), which is an offset to apply to the load addresses of FILE's
1159 sections. The target may define switches, or other non-switch
1160 arguments, as it pleases. */
1162 extern void target_load (char *arg, int from_tty);
1164 /* Start an inferior process and set inferior_ptid to its pid.
1165 EXEC_FILE is the file to run.
1166 ALLARGS is a string containing the arguments to the program.
1167 ENV is the environment vector to pass. Errors reported with error().
1168 On VxWorks and various standalone systems, we ignore exec_file. */
1170 void target_create_inferior (char *exec_file, char *args,
1171 char **env, int from_tty);
1173 /* Some targets (such as ttrace-based HPUX) don't allow us to request
1174 notification of inferior events such as fork and vork immediately
1175 after the inferior is created. (This because of how gdb gets an
1176 inferior created via invoking a shell to do it. In such a scenario,
1177 if the shell init file has commands in it, the shell will fork and
1178 exec for each of those commands, and we will see each such fork
1181 Such targets will supply an appropriate definition for this function. */
1183 #define target_post_startup_inferior(ptid) \
1184 (*current_target.to_post_startup_inferior) (ptid)
1186 /* On some targets, we can catch an inferior fork or vfork event when
1187 it occurs. These functions insert/remove an already-created
1188 catchpoint for such events. They return 0 for success, 1 if the
1189 catchpoint type is not supported and -1 for failure. */
1191 #define target_insert_fork_catchpoint(pid) \
1192 (*current_target.to_insert_fork_catchpoint) (pid)
1194 #define target_remove_fork_catchpoint(pid) \
1195 (*current_target.to_remove_fork_catchpoint) (pid)
1197 #define target_insert_vfork_catchpoint(pid) \
1198 (*current_target.to_insert_vfork_catchpoint) (pid)
1200 #define target_remove_vfork_catchpoint(pid) \
1201 (*current_target.to_remove_vfork_catchpoint) (pid)
1203 /* If the inferior forks or vforks, this function will be called at
1204 the next resume in order to perform any bookkeeping and fiddling
1205 necessary to continue debugging either the parent or child, as
1206 requested, and releasing the other. Information about the fork
1207 or vfork event is available via get_last_target_status ().
1208 This function returns 1 if the inferior should not be resumed
1209 (i.e. there is another event pending). */
1211 int target_follow_fork (int follow_child);
1213 /* On some targets, we can catch an inferior exec event when it
1214 occurs. These functions insert/remove an already-created
1215 catchpoint for such events. They return 0 for success, 1 if the
1216 catchpoint type is not supported and -1 for failure. */
1218 #define target_insert_exec_catchpoint(pid) \
1219 (*current_target.to_insert_exec_catchpoint) (pid)
1221 #define target_remove_exec_catchpoint(pid) \
1222 (*current_target.to_remove_exec_catchpoint) (pid)
1226 NEEDED is nonzero if any syscall catch (of any kind) is requested.
1227 If NEEDED is zero, it means the target can disable the mechanism to
1228 catch system calls because there are no more catchpoints of this type.
1230 ANY_COUNT is nonzero if a generic (filter-less) syscall catch is
1231 being requested. In this case, both TABLE_SIZE and TABLE should
1234 TABLE_SIZE is the number of elements in TABLE. It only matters if
1237 TABLE is an array of ints, indexed by syscall number. An element in
1238 this array is nonzero if that syscall should be caught. This argument
1239 only matters if ANY_COUNT is zero.
1241 Return 0 for success, 1 if syscall catchpoints are not supported or -1
1244 #define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
1245 (*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \
1248 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
1249 exit code of PID, if any. */
1251 #define target_has_exited(pid,wait_status,exit_status) \
1252 (*current_target.to_has_exited) (pid,wait_status,exit_status)
1254 /* The debugger has completed a blocking wait() call. There is now
1255 some process event that must be processed. This function should
1256 be defined by those targets that require the debugger to perform
1257 cleanup or internal state changes in response to the process event. */
1259 /* The inferior process has died. Do what is right. */
1261 void target_mourn_inferior (void);
1263 /* Does target have enough data to do a run or attach command? */
1265 #define target_can_run(t) \
1266 ((t)->to_can_run) ()
1268 /* Set list of signals to be handled in the target.
1270 PASS_SIGNALS is an array of size NSIG, indexed by target signal number
1271 (enum gdb_signal). For every signal whose entry in this array is
1272 non-zero, the target is allowed -but not required- to skip reporting
1273 arrival of the signal to the GDB core by returning from target_wait,
1274 and to pass the signal directly to the inferior instead.
1276 However, if the target is hardware single-stepping a thread that is
1277 about to receive a signal, it needs to be reported in any case, even
1278 if mentioned in a previous target_pass_signals call. */
1280 extern void target_pass_signals (int nsig, unsigned char *pass_signals);
1282 /* Set list of signals the target may pass to the inferior. This
1283 directly maps to the "handle SIGNAL pass/nopass" setting.
1285 PROGRAM_SIGNALS is an array of size NSIG, indexed by target signal
1286 number (enum gdb_signal). For every signal whose entry in this
1287 array is non-zero, the target is allowed to pass the signal to the
1288 inferior. Signals not present in the array shall be silently
1289 discarded. This does not influence whether to pass signals to the
1290 inferior as a result of a target_resume call. This is useful in
1291 scenarios where the target needs to decide whether to pass or not a
1292 signal to the inferior without GDB core involvement, such as for
1293 example, when detaching (as threads may have been suspended with
1294 pending signals not reported to GDB). */
1296 extern void target_program_signals (int nsig, unsigned char *program_signals);
1298 /* Check to see if a thread is still alive. */
1300 extern int target_thread_alive (ptid_t ptid);
1302 /* Query for new threads and add them to the thread list. */
1304 extern void target_find_new_threads (void);
1306 /* Make target stop in a continuable fashion. (For instance, under
1307 Unix, this should act like SIGSTOP). This function is normally
1308 used by GUIs to implement a stop button. */
1310 extern void target_stop (ptid_t ptid);
1312 /* Send the specified COMMAND to the target's monitor
1313 (shell,interpreter) for execution. The result of the query is
1314 placed in OUTBUF. */
1316 #define target_rcmd(command, outbuf) \
1317 (*current_target.to_rcmd) (command, outbuf)
1320 /* Does the target include all of memory, or only part of it? This
1321 determines whether we look up the target chain for other parts of
1322 memory if this target can't satisfy a request. */
1324 extern int target_has_all_memory_1 (void);
1325 #define target_has_all_memory target_has_all_memory_1 ()
1327 /* Does the target include memory? (Dummy targets don't.) */
1329 extern int target_has_memory_1 (void);
1330 #define target_has_memory target_has_memory_1 ()
1332 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1333 we start a process.) */
1335 extern int target_has_stack_1 (void);
1336 #define target_has_stack target_has_stack_1 ()
1338 /* Does the target have registers? (Exec files don't.) */
1340 extern int target_has_registers_1 (void);
1341 #define target_has_registers target_has_registers_1 ()
1343 /* Does the target have execution? Can we make it jump (through
1344 hoops), or pop its stack a few times? This means that the current
1345 target is currently executing; for some targets, that's the same as
1346 whether or not the target is capable of execution, but there are
1347 also targets which can be current while not executing. In that
1348 case this will become true after target_create_inferior or
1351 extern int target_has_execution_1 (ptid_t);
1353 /* Like target_has_execution_1, but always passes inferior_ptid. */
1355 extern int target_has_execution_current (void);
1357 #define target_has_execution target_has_execution_current ()
1359 /* Default implementations for process_stratum targets. Return true
1360 if there's a selected inferior, false otherwise. */
1362 extern int default_child_has_all_memory (struct target_ops *ops);
1363 extern int default_child_has_memory (struct target_ops *ops);
1364 extern int default_child_has_stack (struct target_ops *ops);
1365 extern int default_child_has_registers (struct target_ops *ops);
1366 extern int default_child_has_execution (struct target_ops *ops,
1369 /* Can the target support the debugger control of thread execution?
1370 Can it lock the thread scheduler? */
1372 #define target_can_lock_scheduler \
1373 (current_target.to_has_thread_control & tc_schedlock)
1375 /* Should the target enable async mode if it is supported? Temporary
1376 cludge until async mode is a strict superset of sync mode. */
1377 extern int target_async_permitted;
1379 /* Can the target support asynchronous execution? */
1380 #define target_can_async_p() (current_target.to_can_async_p ())
1382 /* Is the target in asynchronous execution mode? */
1383 #define target_is_async_p() (current_target.to_is_async_p ())
1385 int target_supports_non_stop (void);
1387 /* Put the target in async mode with the specified callback function. */
1388 #define target_async(CALLBACK,CONTEXT) \
1389 (current_target.to_async ((CALLBACK), (CONTEXT)))
1391 #define target_execution_direction() \
1392 (current_target.to_execution_direction ())
1394 /* Converts a process id to a string. Usually, the string just contains
1395 `process xyz', but on some systems it may contain
1396 `process xyz thread abc'. */
1398 extern char *target_pid_to_str (ptid_t ptid);
1400 extern char *normal_pid_to_str (ptid_t ptid);
1402 /* Return a short string describing extra information about PID,
1403 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1406 #define target_extra_thread_info(TP) \
1407 (current_target.to_extra_thread_info (TP))
1409 /* Return the thread's name. A NULL result means that the target
1410 could not determine this thread's name. */
1412 extern char *target_thread_name (struct thread_info *);
1414 /* Attempts to find the pathname of the executable file
1415 that was run to create a specified process.
1417 The process PID must be stopped when this operation is used.
1419 If the executable file cannot be determined, NULL is returned.
1421 Else, a pointer to a character string containing the pathname
1422 is returned. This string should be copied into a buffer by
1423 the client if the string will not be immediately used, or if
1426 #define target_pid_to_exec_file(pid) \
1427 (current_target.to_pid_to_exec_file) (pid)
1429 /* See the to_thread_architecture description in struct target_ops. */
1431 #define target_thread_architecture(ptid) \
1432 (current_target.to_thread_architecture (¤t_target, ptid))
1435 * Iterator function for target memory regions.
1436 * Calls a callback function once for each memory region 'mapped'
1437 * in the child process. Defined as a simple macro rather than
1438 * as a function macro so that it can be tested for nullity.
1441 #define target_find_memory_regions(FUNC, DATA) \
1442 (current_target.to_find_memory_regions) (FUNC, DATA)
1445 * Compose corefile .note section.
1448 #define target_make_corefile_notes(BFD, SIZE_P) \
1449 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1451 /* Bookmark interfaces. */
1452 #define target_get_bookmark(ARGS, FROM_TTY) \
1453 (current_target.to_get_bookmark) (ARGS, FROM_TTY)
1455 #define target_goto_bookmark(ARG, FROM_TTY) \
1456 (current_target.to_goto_bookmark) (ARG, FROM_TTY)
1458 /* Hardware watchpoint interfaces. */
1460 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1461 write). Only the INFERIOR_PTID task is being queried. */
1463 #define target_stopped_by_watchpoint \
1464 (*current_target.to_stopped_by_watchpoint)
1466 /* Non-zero if we have steppable watchpoints */
1468 #define target_have_steppable_watchpoint \
1469 (current_target.to_have_steppable_watchpoint)
1471 /* Non-zero if we have continuable watchpoints */
1473 #define target_have_continuable_watchpoint \
1474 (current_target.to_have_continuable_watchpoint)
1476 /* Provide defaults for hardware watchpoint functions. */
1478 /* If the *_hw_beakpoint functions have not been defined
1479 elsewhere use the definitions in the target vector. */
1481 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1482 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1483 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1484 (including this one?). OTHERTYPE is who knows what... */
1486 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
1487 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1489 /* Returns the number of debug registers needed to watch the given
1490 memory region, or zero if not supported. */
1492 #define target_region_ok_for_hw_watchpoint(addr, len) \
1493 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1496 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes.
1497 TYPE is 0 for write, 1 for read, and 2 for read/write accesses.
1498 COND is the expression for its condition, or NULL if there's none.
1499 Returns 0 for success, 1 if the watchpoint type is not supported,
1502 #define target_insert_watchpoint(addr, len, type, cond) \
1503 (*current_target.to_insert_watchpoint) (addr, len, type, cond)
1505 #define target_remove_watchpoint(addr, len, type, cond) \
1506 (*current_target.to_remove_watchpoint) (addr, len, type, cond)
1508 /* Insert a new masked watchpoint at ADDR using the mask MASK.
1509 RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
1510 or hw_access for an access watchpoint. Returns 0 for success, 1 if
1511 masked watchpoints are not supported, -1 for failure. */
1513 extern int target_insert_mask_watchpoint (CORE_ADDR, CORE_ADDR, int);
1515 /* Remove a masked watchpoint at ADDR with the mask MASK.
1516 RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
1517 or hw_access for an access watchpoint. Returns 0 for success, non-zero
1520 extern int target_remove_mask_watchpoint (CORE_ADDR, CORE_ADDR, int);
1522 #define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
1523 (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt)
1525 #define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
1526 (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt)
1528 /* Return number of debug registers needed for a ranged breakpoint,
1529 or -1 if ranged breakpoints are not supported. */
1531 extern int target_ranged_break_num_registers (void);
1533 /* Return non-zero if target knows the data address which triggered this
1534 target_stopped_by_watchpoint, in such case place it to *ADDR_P. Only the
1535 INFERIOR_PTID task is being queried. */
1536 #define target_stopped_data_address(target, addr_p) \
1537 (*target.to_stopped_data_address) (target, addr_p)
1539 /* Return non-zero if ADDR is within the range of a watchpoint spanning
1540 LENGTH bytes beginning at START. */
1541 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1542 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1544 /* Return non-zero if the target is capable of using hardware to evaluate
1545 the condition expression. In this case, if the condition is false when
1546 the watched memory location changes, execution may continue without the
1547 debugger being notified.
1549 Due to limitations in the hardware implementation, it may be capable of
1550 avoiding triggering the watchpoint in some cases where the condition
1551 expression is false, but may report some false positives as well.
1552 For this reason, GDB will still evaluate the condition expression when
1553 the watchpoint triggers. */
1554 #define target_can_accel_watchpoint_condition(addr, len, type, cond) \
1555 (*current_target.to_can_accel_watchpoint_condition) (addr, len, type, cond)
1557 /* Return number of debug registers needed for a masked watchpoint,
1558 -1 if masked watchpoints are not supported or -2 if the given address
1559 and mask combination cannot be used. */
1561 extern int target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask);
1563 /* Target can execute in reverse? */
1564 #define target_can_execute_reverse \
1565 (current_target.to_can_execute_reverse ? \
1566 current_target.to_can_execute_reverse () : 0)
1568 extern const struct target_desc *target_read_description (struct target_ops *);
1570 #define target_get_ada_task_ptid(lwp, tid) \
1571 (*current_target.to_get_ada_task_ptid) (lwp,tid)
1573 /* Utility implementation of searching memory. */
1574 extern int simple_search_memory (struct target_ops* ops,
1575 CORE_ADDR start_addr,
1576 ULONGEST search_space_len,
1577 const gdb_byte *pattern,
1578 ULONGEST pattern_len,
1579 CORE_ADDR *found_addrp);
1581 /* Main entry point for searching memory. */
1582 extern int target_search_memory (CORE_ADDR start_addr,
1583 ULONGEST search_space_len,
1584 const gdb_byte *pattern,
1585 ULONGEST pattern_len,
1586 CORE_ADDR *found_addrp);
1588 /* Target file operations. */
1590 /* Open FILENAME on the target, using FLAGS and MODE. Return a
1591 target file descriptor, or -1 if an error occurs (and set
1593 extern int target_fileio_open (const char *filename, int flags, int mode,
1596 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
1597 Return the number of bytes written, or -1 if an error occurs
1598 (and set *TARGET_ERRNO). */
1599 extern int target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
1600 ULONGEST offset, int *target_errno);
1602 /* Read up to LEN bytes FD on the target into READ_BUF.
1603 Return the number of bytes read, or -1 if an error occurs
1604 (and set *TARGET_ERRNO). */
1605 extern int target_fileio_pread (int fd, gdb_byte *read_buf, int len,
1606 ULONGEST offset, int *target_errno);
1608 /* Close FD on the target. Return 0, or -1 if an error occurs
1609 (and set *TARGET_ERRNO). */
1610 extern int target_fileio_close (int fd, int *target_errno);
1612 /* Unlink FILENAME on the target. Return 0, or -1 if an error
1613 occurs (and set *TARGET_ERRNO). */
1614 extern int target_fileio_unlink (const char *filename, int *target_errno);
1616 /* Read value of symbolic link FILENAME on the target. Return a
1617 null-terminated string allocated via xmalloc, or NULL if an error
1618 occurs (and set *TARGET_ERRNO). */
1619 extern char *target_fileio_readlink (const char *filename, int *target_errno);
1621 /* Read target file FILENAME. The return value will be -1 if the transfer
1622 fails or is not supported; 0 if the object is empty; or the length
1623 of the object otherwise. If a positive value is returned, a
1624 sufficiently large buffer will be allocated using xmalloc and
1625 returned in *BUF_P containing the contents of the object.
1627 This method should be used for objects sufficiently small to store
1628 in a single xmalloc'd buffer, when no fixed bound on the object's
1629 size is known in advance. */
1630 extern LONGEST target_fileio_read_alloc (const char *filename,
1633 /* Read target file FILENAME. The result is NUL-terminated and
1634 returned as a string, allocated using xmalloc. If an error occurs
1635 or the transfer is unsupported, NULL is returned. Empty objects
1636 are returned as allocated but empty strings. A warning is issued
1637 if the result contains any embedded NUL bytes. */
1638 extern char *target_fileio_read_stralloc (const char *filename);
1641 /* Tracepoint-related operations. */
1643 #define target_trace_init() \
1644 (*current_target.to_trace_init) ()
1646 #define target_download_tracepoint(t) \
1647 (*current_target.to_download_tracepoint) (t)
1649 #define target_can_download_tracepoint() \
1650 (*current_target.to_can_download_tracepoint) ()
1652 #define target_download_trace_state_variable(tsv) \
1653 (*current_target.to_download_trace_state_variable) (tsv)
1655 #define target_enable_tracepoint(loc) \
1656 (*current_target.to_enable_tracepoint) (loc)
1658 #define target_disable_tracepoint(loc) \
1659 (*current_target.to_disable_tracepoint) (loc)
1661 #define target_trace_start() \
1662 (*current_target.to_trace_start) ()
1664 #define target_trace_set_readonly_regions() \
1665 (*current_target.to_trace_set_readonly_regions) ()
1667 #define target_get_trace_status(ts) \
1668 (*current_target.to_get_trace_status) (ts)
1670 #define target_get_tracepoint_status(tp,utp) \
1671 (*current_target.to_get_tracepoint_status) (tp, utp)
1673 #define target_trace_stop() \
1674 (*current_target.to_trace_stop) ()
1676 #define target_trace_find(type,num,addr1,addr2,tpp) \
1677 (*current_target.to_trace_find) ((type), (num), (addr1), (addr2), (tpp))
1679 #define target_get_trace_state_variable_value(tsv,val) \
1680 (*current_target.to_get_trace_state_variable_value) ((tsv), (val))
1682 #define target_save_trace_data(filename) \
1683 (*current_target.to_save_trace_data) (filename)
1685 #define target_upload_tracepoints(utpp) \
1686 (*current_target.to_upload_tracepoints) (utpp)
1688 #define target_upload_trace_state_variables(utsvp) \
1689 (*current_target.to_upload_trace_state_variables) (utsvp)
1691 #define target_get_raw_trace_data(buf,offset,len) \
1692 (*current_target.to_get_raw_trace_data) ((buf), (offset), (len))
1694 #define target_get_min_fast_tracepoint_insn_len() \
1695 (*current_target.to_get_min_fast_tracepoint_insn_len) ()
1697 #define target_set_disconnected_tracing(val) \
1698 (*current_target.to_set_disconnected_tracing) (val)
1700 #define target_set_circular_trace_buffer(val) \
1701 (*current_target.to_set_circular_trace_buffer) (val)
1703 #define target_set_trace_notes(user,notes,stopnotes) \
1704 (*current_target.to_set_trace_notes) ((user), (notes), (stopnotes))
1706 #define target_get_tib_address(ptid, addr) \
1707 (*current_target.to_get_tib_address) ((ptid), (addr))
1709 #define target_set_permissions() \
1710 (*current_target.to_set_permissions) ()
1712 #define target_static_tracepoint_marker_at(addr, marker) \
1713 (*current_target.to_static_tracepoint_marker_at) (addr, marker)
1715 #define target_static_tracepoint_markers_by_strid(marker_id) \
1716 (*current_target.to_static_tracepoint_markers_by_strid) (marker_id)
1718 #define target_traceframe_info() \
1719 (*current_target.to_traceframe_info) ()
1721 #define target_use_agent(use) \
1722 (*current_target.to_use_agent) (use)
1724 #define target_can_use_agent() \
1725 (*current_target.to_can_use_agent) ()
1727 /* Command logging facility. */
1729 #define target_log_command(p) \
1731 if (current_target.to_log_command) \
1732 (*current_target.to_log_command) (p); \
1736 extern int target_core_of_thread (ptid_t ptid);
1738 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range matches
1739 the contents of [DATA,DATA+SIZE). Returns 1 if there's a match, 0
1740 if there's a mismatch, and -1 if an error is encountered while
1741 reading memory. Throws an error if the functionality is found not
1742 to be supported by the current target. */
1743 int target_verify_memory (const gdb_byte *data,
1744 CORE_ADDR memaddr, ULONGEST size);
1746 /* Routines for maintenance of the target structures...
1748 add_target: Add a target to the list of all possible targets.
1750 push_target: Make this target the top of the stack of currently used
1751 targets, within its particular stratum of the stack. Result
1752 is 0 if now atop the stack, nonzero if not on top (maybe
1755 unpush_target: Remove this from the stack of currently used targets,
1756 no matter where it is on the list. Returns 0 if no
1757 change, 1 if removed from stack.
1759 pop_target: Remove the top thing on the stack of current targets. */
1761 extern void add_target (struct target_ops *);
1763 extern void push_target (struct target_ops *);
1765 extern int unpush_target (struct target_ops *);
1767 extern void target_pre_inferior (int);
1769 extern void target_preopen (int);
1771 extern void pop_target (void);
1773 /* Does whatever cleanup is required to get rid of all pushed targets.
1774 QUITTING is propagated to target_close; it indicates that GDB is
1775 exiting and should not get hung on an error (otherwise it is
1776 important to perform clean termination, even if it takes a
1778 extern void pop_all_targets (int quitting);
1780 /* Like pop_all_targets, but pops only targets whose stratum is
1781 strictly above ABOVE_STRATUM. */
1782 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1784 extern int target_is_pushed (struct target_ops *t);
1786 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1789 /* Struct target_section maps address ranges to file sections. It is
1790 mostly used with BFD files, but can be used without (e.g. for handling
1791 raw disks, or files not in formats handled by BFD). */
1793 struct target_section
1795 CORE_ADDR addr; /* Lowest address in section */
1796 CORE_ADDR endaddr; /* 1+highest address in section */
1798 struct bfd_section *the_bfd_section;
1800 /* A given BFD may appear multiple times in the target section
1801 list, so each BFD is associated with a given key. The key is
1802 just some convenient pointer that can be used to differentiate
1803 the BFDs. These are managed only by convention. */
1806 bfd *bfd; /* BFD file pointer */
1809 /* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
1811 struct target_section_table
1813 struct target_section *sections;
1814 struct target_section *sections_end;
1817 /* Return the "section" containing the specified address. */
1818 struct target_section *target_section_by_addr (struct target_ops *target,
1821 /* Return the target section table this target (or the targets
1822 beneath) currently manipulate. */
1824 extern struct target_section_table *target_get_section_table
1825 (struct target_ops *target);
1827 /* From mem-break.c */
1829 extern int memory_remove_breakpoint (struct gdbarch *,
1830 struct bp_target_info *);
1832 extern int memory_insert_breakpoint (struct gdbarch *,
1833 struct bp_target_info *);
1835 extern int default_memory_remove_breakpoint (struct gdbarch *,
1836 struct bp_target_info *);
1838 extern int default_memory_insert_breakpoint (struct gdbarch *,
1839 struct bp_target_info *);
1844 extern void initialize_targets (void);
1846 extern void noprocess (void) ATTRIBUTE_NORETURN;
1848 extern void target_require_runnable (void);
1850 extern void find_default_attach (struct target_ops *, char *, int);
1852 extern void find_default_create_inferior (struct target_ops *,
1853 char *, char *, char **, int);
1855 extern struct target_ops *find_run_target (void);
1857 extern struct target_ops *find_target_beneath (struct target_ops *);
1859 /* Read OS data object of type TYPE from the target, and return it in
1860 XML format. The result is NUL-terminated and returned as a string,
1861 allocated using xmalloc. If an error occurs or the transfer is
1862 unsupported, NULL is returned. Empty objects are returned as
1863 allocated but empty strings. */
1865 extern char *target_get_osdata (const char *type);
1868 /* Stuff that should be shared among the various remote targets. */
1870 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1871 information (higher values, more information). */
1872 extern int remote_debug;
1874 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1875 extern int baud_rate;
1876 /* Timeout limit for response from target. */
1877 extern int remote_timeout;
1881 /* Set the show memory breakpoints mode to show, and installs a cleanup
1882 to restore it back to the current value. */
1883 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1885 extern int may_write_registers;
1886 extern int may_write_memory;
1887 extern int may_insert_breakpoints;
1888 extern int may_insert_tracepoints;
1889 extern int may_insert_fast_tracepoints;
1890 extern int may_stop;
1892 extern void update_target_permissions (void);
1895 /* Imported from machine dependent code. */
1897 /* Blank target vector entries are initialized to target_ignore. */
1898 void target_ignore (void);
1900 #endif /* !defined (TARGET_H) */