1 /* Interface between GDB and target environments, including files and processes
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support. Written by John Gilmore.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #if !defined (TARGET_H)
31 struct bp_target_info
;
33 struct target_section_table
;
34 struct trace_state_variable
;
38 struct static_tracepoint_marker
;
42 /* This include file defines the interface between the main part
43 of the debugger, and the part which is target-specific, or
44 specific to the communications interface between us and the
47 A TARGET is an interface between the debugger and a particular
48 kind of file or process. Targets can be STACKED in STRATA,
49 so that more than one target can potentially respond to a request.
50 In particular, memory accesses will walk down the stack of targets
51 until they find a target that is interested in handling that particular
52 address. STRATA are artificial boundaries on the stack, within
53 which particular kinds of targets live. Strata exist so that
54 people don't get confused by pushing e.g. a process target and then
55 a file target, and wondering why they can't see the current values
56 of variables any more (the file target is handling them and they
57 never get to the process target). So when you push a file target,
58 it goes into the file stratum, which is always below the process
65 #include "gdb_signals.h"
69 dummy_stratum
, /* The lowest of the low */
70 file_stratum
, /* Executable files, etc */
71 core_stratum
, /* Core dump files */
72 process_stratum
, /* Executing processes */
73 thread_stratum
, /* Executing threads */
74 record_stratum
, /* Support record debugging */
75 arch_stratum
/* Architecture overrides */
78 enum thread_control_capabilities
80 tc_none
= 0, /* Default: can't control thread execution. */
81 tc_schedlock
= 1, /* Can lock the thread scheduler. */
84 /* Stuff for target_wait. */
86 /* Generally, what has the program done? */
89 /* The program has exited. The exit status is in value.integer. */
90 TARGET_WAITKIND_EXITED
,
92 /* The program has stopped with a signal. Which signal is in
94 TARGET_WAITKIND_STOPPED
,
96 /* The program has terminated with a signal. Which signal is in
98 TARGET_WAITKIND_SIGNALLED
,
100 /* The program is letting us know that it dynamically loaded something
101 (e.g. it called load(2) on AIX). */
102 TARGET_WAITKIND_LOADED
,
104 /* The program has forked. A "related" process' PTID is in
105 value.related_pid. I.e., if the child forks, value.related_pid
106 is the parent's ID. */
108 TARGET_WAITKIND_FORKED
,
110 /* The program has vforked. A "related" process's PTID is in
111 value.related_pid. */
113 TARGET_WAITKIND_VFORKED
,
115 /* The program has exec'ed a new executable file. The new file's
116 pathname is pointed to by value.execd_pathname. */
118 TARGET_WAITKIND_EXECD
,
120 /* The program had previously vforked, and now the child is done
121 with the shared memory region, because it exec'ed or exited.
122 Note that the event is reported to the vfork parent. This is
123 only used if GDB did not stay attached to the vfork child,
124 otherwise, a TARGET_WAITKIND_EXECD or
125 TARGET_WAITKIND_EXIT|SIGNALLED event associated with the child
126 has the same effect. */
127 TARGET_WAITKIND_VFORK_DONE
,
129 /* The program has entered or returned from a system call. On
130 HP-UX, this is used in the hardware watchpoint implementation.
131 The syscall's unique integer ID number is in value.syscall_id */
133 TARGET_WAITKIND_SYSCALL_ENTRY
,
134 TARGET_WAITKIND_SYSCALL_RETURN
,
136 /* Nothing happened, but we stopped anyway. This perhaps should be handled
137 within target_wait, but I'm not sure target_wait should be resuming the
139 TARGET_WAITKIND_SPURIOUS
,
141 /* An event has occured, but we should wait again.
142 Remote_async_wait() returns this when there is an event
143 on the inferior, but the rest of the world is not interested in
144 it. The inferior has not stopped, but has just sent some output
145 to the console, for instance. In this case, we want to go back
146 to the event loop and wait there for another event from the
147 inferior, rather than being stuck in the remote_async_wait()
148 function. This way the event loop is responsive to other events,
149 like for instance the user typing. */
150 TARGET_WAITKIND_IGNORE
,
152 /* The target has run out of history information,
153 and cannot run backward any further. */
154 TARGET_WAITKIND_NO_HISTORY
157 struct target_waitstatus
159 enum target_waitkind kind
;
161 /* Forked child pid, execd pathname, exit status, signal number or
166 enum target_signal sig
;
168 char *execd_pathname
;
174 /* Options that can be passed to target_wait. */
176 /* Return immediately if there's no event already queued. If this
177 options is not requested, target_wait blocks waiting for an
179 #define TARGET_WNOHANG 1
181 /* The structure below stores information about a system call.
182 It is basically used in the "catch syscall" command, and in
183 every function that gives information about a system call.
185 It's also good to mention that its fields represent everything
186 that we currently know about a syscall in GDB. */
189 /* The syscall number. */
192 /* The syscall name. */
196 /* Return a pretty printed form of target_waitstatus.
197 Space for the result is malloc'd, caller must free. */
198 extern char *target_waitstatus_to_string (const struct target_waitstatus
*);
200 /* Possible types of events that the inferior handler will have to
202 enum inferior_event_type
204 /* There is a request to quit the inferior, abandon it. */
206 /* Process a normal inferior event which will result in target_wait
209 /* Deal with an error on the inferior. */
211 /* We are called because a timer went off. */
213 /* We are called to do stuff after the inferior stops. */
215 /* We are called to do some stuff after the inferior stops, but we
216 are expected to reenter the proceed() and
217 handle_inferior_event() functions. This is used only in case of
218 'step n' like commands. */
222 /* Target objects which can be transfered using target_read,
223 target_write, et cetera. */
227 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
229 /* SPU target specific transfer. See "spu-tdep.c". */
231 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
232 TARGET_OBJECT_MEMORY
,
233 /* Memory, avoiding GDB's data cache and trusting the executable.
234 Target implementations of to_xfer_partial never need to handle
235 this object, and most callers should not use it. */
236 TARGET_OBJECT_RAW_MEMORY
,
237 /* Memory known to be part of the target's stack. This is cached even
238 if it is not in a region marked as such, since it is known to be
240 TARGET_OBJECT_STACK_MEMORY
,
241 /* Kernel Unwind Table. See "ia64-tdep.c". */
242 TARGET_OBJECT_UNWIND_TABLE
,
243 /* Transfer auxilliary vector. */
245 /* StackGhost cookie. See "sparc-tdep.c". */
246 TARGET_OBJECT_WCOOKIE
,
247 /* Target memory map in XML format. */
248 TARGET_OBJECT_MEMORY_MAP
,
249 /* Flash memory. This object can be used to write contents to
250 a previously erased flash memory. Using it without erasing
251 flash can have unexpected results. Addresses are physical
252 address on target, and not relative to flash start. */
254 /* Available target-specific features, e.g. registers and coprocessors.
255 See "target-descriptions.c". ANNEX should never be empty. */
256 TARGET_OBJECT_AVAILABLE_FEATURES
,
257 /* Currently loaded libraries, in XML format. */
258 TARGET_OBJECT_LIBRARIES
,
259 /* Get OS specific data. The ANNEX specifies the type (running
261 TARGET_OBJECT_OSDATA
,
262 /* Extra signal info. Usually the contents of `siginfo_t' on unix
264 TARGET_OBJECT_SIGNAL_INFO
,
265 /* The list of threads that are being debugged. */
266 TARGET_OBJECT_THREADS
,
267 /* Collected static trace data. */
268 TARGET_OBJECT_STATIC_TRACE_DATA
,
269 /* Possible future objects: TARGET_OBJECT_FILE, ... */
272 /* Enumeration of the kinds of traceframe searches that a target may
273 be able to perform. */
284 typedef struct static_tracepoint_marker
*static_tracepoint_marker_p
;
285 DEF_VEC_P(static_tracepoint_marker_p
);
287 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
288 OBJECT. The OFFSET, for a seekable object, specifies the
289 starting point. The ANNEX can be used to provide additional
290 data-specific information to the target.
292 Return the number of bytes actually transfered, or -1 if the
293 transfer is not supported or otherwise fails. Return of a positive
294 value less than LEN indicates that no further transfer is possible.
295 Unlike the raw to_xfer_partial interface, callers of these
296 functions do not need to retry partial transfers. */
298 extern LONGEST
target_read (struct target_ops
*ops
,
299 enum target_object object
,
300 const char *annex
, gdb_byte
*buf
,
301 ULONGEST offset
, LONGEST len
);
303 extern LONGEST
target_read_until_error (struct target_ops
*ops
,
304 enum target_object object
,
305 const char *annex
, gdb_byte
*buf
,
306 ULONGEST offset
, LONGEST len
);
308 extern LONGEST
target_write (struct target_ops
*ops
,
309 enum target_object object
,
310 const char *annex
, const gdb_byte
*buf
,
311 ULONGEST offset
, LONGEST len
);
313 /* Similar to target_write, except that it also calls PROGRESS with
314 the number of bytes written and the opaque BATON after every
315 successful partial write (and before the first write). This is
316 useful for progress reporting and user interaction while writing
317 data. To abort the transfer, the progress callback can throw an
320 LONGEST
target_write_with_progress (struct target_ops
*ops
,
321 enum target_object object
,
322 const char *annex
, const gdb_byte
*buf
,
323 ULONGEST offset
, LONGEST len
,
324 void (*progress
) (ULONGEST
, void *),
327 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
328 be read using OPS. The return value will be -1 if the transfer
329 fails or is not supported; 0 if the object is empty; or the length
330 of the object otherwise. If a positive value is returned, a
331 sufficiently large buffer will be allocated using xmalloc and
332 returned in *BUF_P containing the contents of the object.
334 This method should be used for objects sufficiently small to store
335 in a single xmalloc'd buffer, when no fixed bound on the object's
336 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
337 through this function. */
339 extern LONGEST
target_read_alloc (struct target_ops
*ops
,
340 enum target_object object
,
341 const char *annex
, gdb_byte
**buf_p
);
343 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
344 returned as a string, allocated using xmalloc. If an error occurs
345 or the transfer is unsupported, NULL is returned. Empty objects
346 are returned as allocated but empty strings. A warning is issued
347 if the result contains any embedded NUL bytes. */
349 extern char *target_read_stralloc (struct target_ops
*ops
,
350 enum target_object object
,
353 /* Wrappers to target read/write that perform memory transfers. They
354 throw an error if the memory transfer fails.
356 NOTE: cagney/2003-10-23: The naming schema is lifted from
357 "frame.h". The parameter order is lifted from get_frame_memory,
358 which in turn lifted it from read_memory. */
360 extern void get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
,
361 gdb_byte
*buf
, LONGEST len
);
362 extern ULONGEST
get_target_memory_unsigned (struct target_ops
*ops
,
363 CORE_ADDR addr
, int len
,
364 enum bfd_endian byte_order
);
366 struct thread_info
; /* fwd decl for parameter list below: */
370 struct target_ops
*beneath
; /* To the target under this one. */
371 char *to_shortname
; /* Name this target type */
372 char *to_longname
; /* Name for printing */
373 char *to_doc
; /* Documentation. Does not include trailing
374 newline, and starts with a one-line descrip-
375 tion (probably similar to to_longname). */
376 /* Per-target scratch pad. */
378 /* The open routine takes the rest of the parameters from the
379 command, and (if successful) pushes a new target onto the
380 stack. Targets should supply this routine, if only to provide
382 void (*to_open
) (char *, int);
383 /* Old targets with a static target vector provide "to_close".
384 New re-entrant targets provide "to_xclose" and that is expected
385 to xfree everything (including the "struct target_ops"). */
386 void (*to_xclose
) (struct target_ops
*targ
, int quitting
);
387 void (*to_close
) (int);
388 void (*to_attach
) (struct target_ops
*ops
, char *, int);
389 void (*to_post_attach
) (int);
390 void (*to_detach
) (struct target_ops
*ops
, char *, int);
391 void (*to_disconnect
) (struct target_ops
*, char *, int);
392 void (*to_resume
) (struct target_ops
*, ptid_t
, int, enum target_signal
);
393 ptid_t (*to_wait
) (struct target_ops
*,
394 ptid_t
, struct target_waitstatus
*, int);
395 void (*to_fetch_registers
) (struct target_ops
*, struct regcache
*, int);
396 void (*to_store_registers
) (struct target_ops
*, struct regcache
*, int);
397 void (*to_prepare_to_store
) (struct regcache
*);
399 /* Transfer LEN bytes of memory between GDB address MYADDR and
400 target address MEMADDR. If WRITE, transfer them to the target, else
401 transfer them from the target. TARGET is the target from which we
404 Return value, N, is one of the following:
406 0 means that we can't handle this. If errno has been set, it is the
407 error which prevented us from doing it (FIXME: What about bfd_error?).
409 positive (call it N) means that we have transferred N bytes
410 starting at MEMADDR. We might be able to handle more bytes
411 beyond this length, but no promises.
413 negative (call its absolute value N) means that we cannot
414 transfer right at MEMADDR, but we could transfer at least
415 something at MEMADDR + N.
417 NOTE: cagney/2004-10-01: This has been entirely superseeded by
418 to_xfer_partial and inferior inheritance. */
420 int (*deprecated_xfer_memory
) (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
422 struct mem_attrib
*attrib
,
423 struct target_ops
*target
);
425 void (*to_files_info
) (struct target_ops
*);
426 int (*to_insert_breakpoint
) (struct gdbarch
*, struct bp_target_info
*);
427 int (*to_remove_breakpoint
) (struct gdbarch
*, struct bp_target_info
*);
428 int (*to_can_use_hw_breakpoint
) (int, int, int);
429 int (*to_insert_hw_breakpoint
) (struct gdbarch
*, struct bp_target_info
*);
430 int (*to_remove_hw_breakpoint
) (struct gdbarch
*, struct bp_target_info
*);
432 /* Documentation of what the two routines below are expected to do is
433 provided with the corresponding target_* macros. */
434 int (*to_remove_watchpoint
) (CORE_ADDR
, int, int, struct expression
*);
435 int (*to_insert_watchpoint
) (CORE_ADDR
, int, int, struct expression
*);
437 int (*to_stopped_by_watchpoint
) (void);
438 int to_have_steppable_watchpoint
;
439 int to_have_continuable_watchpoint
;
440 int (*to_stopped_data_address
) (struct target_ops
*, CORE_ADDR
*);
441 int (*to_watchpoint_addr_within_range
) (struct target_ops
*,
442 CORE_ADDR
, CORE_ADDR
, int);
443 int (*to_region_ok_for_hw_watchpoint
) (CORE_ADDR
, int);
444 int (*to_can_accel_watchpoint_condition
) (CORE_ADDR
, int, int,
445 struct expression
*);
446 void (*to_terminal_init
) (void);
447 void (*to_terminal_inferior
) (void);
448 void (*to_terminal_ours_for_output
) (void);
449 void (*to_terminal_ours
) (void);
450 void (*to_terminal_save_ours
) (void);
451 void (*to_terminal_info
) (char *, int);
452 void (*to_kill
) (struct target_ops
*);
453 void (*to_load
) (char *, int);
454 int (*to_lookup_symbol
) (char *, CORE_ADDR
*);
455 void (*to_create_inferior
) (struct target_ops
*,
456 char *, char *, char **, int);
457 void (*to_post_startup_inferior
) (ptid_t
);
458 void (*to_acknowledge_created_inferior
) (int);
459 void (*to_insert_fork_catchpoint
) (int);
460 int (*to_remove_fork_catchpoint
) (int);
461 void (*to_insert_vfork_catchpoint
) (int);
462 int (*to_remove_vfork_catchpoint
) (int);
463 int (*to_follow_fork
) (struct target_ops
*, int);
464 void (*to_insert_exec_catchpoint
) (int);
465 int (*to_remove_exec_catchpoint
) (int);
466 int (*to_set_syscall_catchpoint
) (int, int, int, int, int *);
467 int (*to_has_exited
) (int, int, int *);
468 void (*to_mourn_inferior
) (struct target_ops
*);
469 int (*to_can_run
) (void);
470 void (*to_notice_signals
) (ptid_t ptid
);
471 int (*to_thread_alive
) (struct target_ops
*, ptid_t ptid
);
472 void (*to_find_new_threads
) (struct target_ops
*);
473 char *(*to_pid_to_str
) (struct target_ops
*, ptid_t
);
474 char *(*to_extra_thread_info
) (struct thread_info
*);
475 void (*to_stop
) (ptid_t
);
476 void (*to_rcmd
) (char *command
, struct ui_file
*output
);
477 char *(*to_pid_to_exec_file
) (int pid
);
478 void (*to_log_command
) (const char *);
479 struct target_section_table
*(*to_get_section_table
) (struct target_ops
*);
480 enum strata to_stratum
;
481 int (*to_has_all_memory
) (struct target_ops
*);
482 int (*to_has_memory
) (struct target_ops
*);
483 int (*to_has_stack
) (struct target_ops
*);
484 int (*to_has_registers
) (struct target_ops
*);
485 int (*to_has_execution
) (struct target_ops
*);
486 int to_has_thread_control
; /* control thread execution */
487 int to_attach_no_wait
;
488 /* ASYNC target controls */
489 int (*to_can_async_p
) (void);
490 int (*to_is_async_p
) (void);
491 void (*to_async
) (void (*) (enum inferior_event_type
, void *), void *);
492 int (*to_async_mask
) (int);
493 int (*to_supports_non_stop
) (void);
494 /* find_memory_regions support method for gcore */
495 int (*to_find_memory_regions
) (int (*) (CORE_ADDR
,
500 /* make_corefile_notes support method for gcore */
501 char * (*to_make_corefile_notes
) (bfd
*, int *);
502 /* get_bookmark support method for bookmarks */
503 gdb_byte
* (*to_get_bookmark
) (char *, int);
504 /* goto_bookmark support method for bookmarks */
505 void (*to_goto_bookmark
) (gdb_byte
*, int);
506 /* Return the thread-local address at OFFSET in the
507 thread-local storage for the thread PTID and the shared library
508 or executable file given by OBJFILE. If that block of
509 thread-local storage hasn't been allocated yet, this function
510 may return an error. */
511 CORE_ADDR (*to_get_thread_local_address
) (struct target_ops
*ops
,
513 CORE_ADDR load_module_addr
,
516 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
517 OBJECT. The OFFSET, for a seekable object, specifies the
518 starting point. The ANNEX can be used to provide additional
519 data-specific information to the target.
521 Return the number of bytes actually transfered, zero when no
522 further transfer is possible, and -1 when the transfer is not
523 supported. Return of a positive value smaller than LEN does
524 not indicate the end of the object, only the end of the
525 transfer; higher level code should continue transferring if
526 desired. This is handled in target.c.
528 The interface does not support a "retry" mechanism. Instead it
529 assumes that at least one byte will be transfered on each
532 NOTE: cagney/2003-10-17: The current interface can lead to
533 fragmented transfers. Lower target levels should not implement
534 hacks, such as enlarging the transfer, in an attempt to
535 compensate for this. Instead, the target stack should be
536 extended so that it implements supply/collect methods and a
537 look-aside object cache. With that available, the lowest
538 target can safely and freely "push" data up the stack.
540 See target_read and target_write for more information. One,
541 and only one, of readbuf or writebuf must be non-NULL. */
543 LONGEST (*to_xfer_partial
) (struct target_ops
*ops
,
544 enum target_object object
, const char *annex
,
545 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
546 ULONGEST offset
, LONGEST len
);
548 /* Returns the memory map for the target. A return value of NULL
549 means that no memory map is available. If a memory address
550 does not fall within any returned regions, it's assumed to be
551 RAM. The returned memory regions should not overlap.
553 The order of regions does not matter; target_memory_map will
554 sort regions by starting address. For that reason, this
555 function should not be called directly except via
558 This method should not cache data; if the memory map could
559 change unexpectedly, it should be invalidated, and higher
560 layers will re-fetch it. */
561 VEC(mem_region_s
) *(*to_memory_map
) (struct target_ops
*);
563 /* Erases the region of flash memory starting at ADDRESS, of
566 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
567 on flash block boundaries, as reported by 'to_memory_map'. */
568 void (*to_flash_erase
) (struct target_ops
*,
569 ULONGEST address
, LONGEST length
);
571 /* Finishes a flash memory write sequence. After this operation
572 all flash memory should be available for writing and the result
573 of reading from areas written by 'to_flash_write' should be
574 equal to what was written. */
575 void (*to_flash_done
) (struct target_ops
*);
577 /* Describe the architecture-specific features of this target.
578 Returns the description found, or NULL if no description
580 const struct target_desc
*(*to_read_description
) (struct target_ops
*ops
);
582 /* Build the PTID of the thread on which a given task is running,
583 based on LWP and THREAD. These values are extracted from the
584 task Private_Data section of the Ada Task Control Block, and
585 their interpretation depends on the target. */
586 ptid_t (*to_get_ada_task_ptid
) (long lwp
, long thread
);
588 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
589 Return 0 if *READPTR is already at the end of the buffer.
590 Return -1 if there is insufficient buffer for a whole entry.
591 Return 1 if an entry was read into *TYPEP and *VALP. */
592 int (*to_auxv_parse
) (struct target_ops
*ops
, gdb_byte
**readptr
,
593 gdb_byte
*endptr
, CORE_ADDR
*typep
, CORE_ADDR
*valp
);
595 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
596 sequence of bytes in PATTERN with length PATTERN_LEN.
598 The result is 1 if found, 0 if not found, and -1 if there was an error
599 requiring halting of the search (e.g. memory read error).
600 If the pattern is found the address is recorded in FOUND_ADDRP. */
601 int (*to_search_memory
) (struct target_ops
*ops
,
602 CORE_ADDR start_addr
, ULONGEST search_space_len
,
603 const gdb_byte
*pattern
, ULONGEST pattern_len
,
604 CORE_ADDR
*found_addrp
);
606 /* Can target execute in reverse? */
607 int (*to_can_execute_reverse
) (void);
609 /* Does this target support debugging multiple processes
611 int (*to_supports_multi_process
) (void);
613 /* Determine current architecture of thread PTID.
615 The target is supposed to determine the architecture of the code where
616 the target is currently stopped at (on Cell, if a target is in spu_run,
617 to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
618 This is architecture used to perform decr_pc_after_break adjustment,
619 and also determines the frame architecture of the innermost frame.
620 ptrace operations need to operate according to target_gdbarch.
622 The default implementation always returns target_gdbarch. */
623 struct gdbarch
*(*to_thread_architecture
) (struct target_ops
*, ptid_t
);
625 /* Determine current address space of thread PTID.
627 The default implementation always returns the inferior's
629 struct address_space
*(*to_thread_address_space
) (struct target_ops
*,
632 /* Tracepoint-related operations. */
634 /* Prepare the target for a tracing run. */
635 void (*to_trace_init
) (void);
637 /* Send full details of a tracepoint to the target. */
638 void (*to_download_tracepoint
) (struct breakpoint
*t
);
640 /* Send full details of a trace state variable to the target. */
641 void (*to_download_trace_state_variable
) (struct trace_state_variable
*tsv
);
643 /* Inform the target info of memory regions that are readonly
644 (such as text sections), and so it should return data from
645 those rather than look in the trace buffer. */
646 void (*to_trace_set_readonly_regions
) (void);
648 /* Start a trace run. */
649 void (*to_trace_start
) (void);
651 /* Get the current status of a tracing run. */
652 int (*to_get_trace_status
) (struct trace_status
*ts
);
654 /* Stop a trace run. */
655 void (*to_trace_stop
) (void);
657 /* Ask the target to find a trace frame of the given type TYPE,
658 using NUM, ADDR1, and ADDR2 as search parameters. Returns the
659 number of the trace frame, and also the tracepoint number at
660 TPP. If no trace frame matches, return -1. May throw if the
662 int (*to_trace_find
) (enum trace_find_type type
, int num
,
663 ULONGEST addr1
, ULONGEST addr2
, int *tpp
);
665 /* Get the value of the trace state variable number TSV, returning
666 1 if the value is known and writing the value itself into the
667 location pointed to by VAL, else returning 0. */
668 int (*to_get_trace_state_variable_value
) (int tsv
, LONGEST
*val
);
670 int (*to_save_trace_data
) (const char *filename
);
672 int (*to_upload_tracepoints
) (struct uploaded_tp
**utpp
);
674 int (*to_upload_trace_state_variables
) (struct uploaded_tsv
**utsvp
);
676 LONGEST (*to_get_raw_trace_data
) (gdb_byte
*buf
,
677 ULONGEST offset
, LONGEST len
);
679 /* Set the target's tracing behavior in response to unexpected
680 disconnection - set VAL to 1 to keep tracing, 0 to stop. */
681 void (*to_set_disconnected_tracing
) (int val
);
682 void (*to_set_circular_trace_buffer
) (int val
);
684 /* Return the processor core that thread PTID was last seen on.
685 This information is updated only when:
686 - update_thread_list is called
688 If the core cannot be determined -- either for the specified thread, or
689 right now, or in this debug session, or for this target -- return -1. */
690 int (*to_core_of_thread
) (struct target_ops
*, ptid_t ptid
);
692 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range
693 matches the contents of [DATA,DATA+SIZE). Returns 1 if there's
694 a match, 0 if there's a mismatch, and -1 if an error is
695 encountered while reading memory. */
696 int (*to_verify_memory
) (struct target_ops
*, const gdb_byte
*data
,
697 CORE_ADDR memaddr
, ULONGEST size
);
699 /* Return the address of the start of the Thread Information Block
700 a Windows OS specific feature. */
701 int (*to_get_tib_address
) (ptid_t ptid
, CORE_ADDR
*addr
);
703 /* Send the new settings of write permission variables. */
704 void (*to_set_permissions
) (void);
706 /* Look for a static tracepoint marker at ADDR, and fill in MARKER
707 with its details. Return 1 on success, 0 on failure. */
708 int (*to_static_tracepoint_marker_at
) (CORE_ADDR
,
709 struct static_tracepoint_marker
*marker
);
711 /* Return a vector of all tracepoints markers string id ID, or all
712 markers if ID is NULL. */
713 VEC(static_tracepoint_marker_p
) *(*to_static_tracepoint_markers_by_strid
)
717 /* Need sub-structure for target machine related rather than comm related?
721 /* Magic number for checking ops size. If a struct doesn't end with this
722 number, somebody changed the declaration but didn't change all the
723 places that initialize one. */
725 #define OPS_MAGIC 3840
727 /* The ops structure for our "current" target process. This should
728 never be NULL. If there is no target, it points to the dummy_target. */
730 extern struct target_ops current_target
;
732 /* Define easy words for doing these operations on our current target. */
734 #define target_shortname (current_target.to_shortname)
735 #define target_longname (current_target.to_longname)
737 /* Does whatever cleanup is required for a target that we are no
738 longer going to be calling. QUITTING indicates that GDB is exiting
739 and should not get hung on an error (otherwise it is important to
740 perform clean termination, even if it takes a while). This routine
741 is automatically always called when popping the target off the
742 target stack (to_beneath is undefined). Closing file descriptors
743 and freeing all memory allocated memory are typical things it
746 void target_close (struct target_ops
*targ
, int quitting
);
748 /* Attaches to a process on the target side. Arguments are as passed
749 to the `attach' command by the user. This routine can be called
750 when the target is not on the target-stack, if the target_can_run
751 routine returns 1; in that case, it must push itself onto the stack.
752 Upon exit, the target should be ready for normal operations, and
753 should be ready to deliver the status of the process immediately
754 (without waiting) to an upcoming target_wait call. */
756 void target_attach (char *, int);
758 /* Some targets don't generate traps when attaching to the inferior,
759 or their target_attach implementation takes care of the waiting.
760 These targets must set to_attach_no_wait. */
762 #define target_attach_no_wait \
763 (current_target.to_attach_no_wait)
765 /* The target_attach operation places a process under debugger control,
766 and stops the process.
768 This operation provides a target-specific hook that allows the
769 necessary bookkeeping to be performed after an attach completes. */
770 #define target_post_attach(pid) \
771 (*current_target.to_post_attach) (pid)
773 /* Takes a program previously attached to and detaches it.
774 The program may resume execution (some targets do, some don't) and will
775 no longer stop on signals, etc. We better not have left any breakpoints
776 in the program or it'll die when it hits one. ARGS is arguments
777 typed by the user (e.g. a signal to send the process). FROM_TTY
778 says whether to be verbose or not. */
780 extern void target_detach (char *, int);
782 /* Disconnect from the current target without resuming it (leaving it
783 waiting for a debugger). */
785 extern void target_disconnect (char *, int);
787 /* Resume execution of the target process PTID. STEP says whether to
788 single-step or to run free; SIGGNAL is the signal to be given to
789 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
790 pass TARGET_SIGNAL_DEFAULT. */
792 extern void target_resume (ptid_t ptid
, int step
, enum target_signal signal
);
794 /* Wait for process pid to do something. PTID = -1 to wait for any
795 pid to do something. Return pid of child, or -1 in case of error;
796 store status through argument pointer STATUS. Note that it is
797 _NOT_ OK to throw_exception() out of target_wait() without popping
798 the debugging target from the stack; GDB isn't prepared to get back
799 to the prompt with a debugging target but without the frame cache,
800 stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W*
803 extern ptid_t
target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
806 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
808 extern void target_fetch_registers (struct regcache
*regcache
, int regno
);
810 /* Store at least register REGNO, or all regs if REGNO == -1.
811 It can store as many registers as it wants to, so target_prepare_to_store
812 must have been previously called. Calls error() if there are problems. */
814 extern void target_store_registers (struct regcache
*regcache
, int regs
);
816 /* Get ready to modify the registers array. On machines which store
817 individual registers, this doesn't need to do anything. On machines
818 which store all the registers in one fell swoop, this makes sure
819 that REGISTERS contains all the registers from the program being
822 #define target_prepare_to_store(regcache) \
823 (*current_target.to_prepare_to_store) (regcache)
825 /* Determine current address space of thread PTID. */
827 struct address_space
*target_thread_address_space (ptid_t
);
829 /* Returns true if this target can debug multiple processes
832 #define target_supports_multi_process() \
833 (*current_target.to_supports_multi_process) ()
835 /* Invalidate all target dcaches. */
836 extern void target_dcache_invalidate (void);
838 extern int target_read_string (CORE_ADDR
, char **, int, int *);
840 extern int target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
);
842 extern int target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
);
844 extern int target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
847 /* Fetches the target's memory map. If one is found it is sorted
848 and returned, after some consistency checking. Otherwise, NULL
850 VEC(mem_region_s
) *target_memory_map (void);
852 /* Erase the specified flash region. */
853 void target_flash_erase (ULONGEST address
, LONGEST length
);
855 /* Finish a sequence of flash operations. */
856 void target_flash_done (void);
858 /* Describes a request for a memory write operation. */
859 struct memory_write_request
861 /* Begining address that must be written. */
863 /* Past-the-end address. */
865 /* The data to write. */
867 /* A callback baton for progress reporting for this request. */
870 typedef struct memory_write_request memory_write_request_s
;
871 DEF_VEC_O(memory_write_request_s
);
873 /* Enumeration specifying different flash preservation behaviour. */
874 enum flash_preserve_mode
880 /* Write several memory blocks at once. This version can be more
881 efficient than making several calls to target_write_memory, in
882 particular because it can optimize accesses to flash memory.
884 Moreover, this is currently the only memory access function in gdb
885 that supports writing to flash memory, and it should be used for
886 all cases where access to flash memory is desirable.
888 REQUESTS is the vector (see vec.h) of memory_write_request.
889 PRESERVE_FLASH_P indicates what to do with blocks which must be
890 erased, but not completely rewritten.
891 PROGRESS_CB is a function that will be periodically called to provide
892 feedback to user. It will be called with the baton corresponding
893 to the request currently being written. It may also be called
894 with a NULL baton, when preserved flash sectors are being rewritten.
896 The function returns 0 on success, and error otherwise. */
897 int target_write_memory_blocks (VEC(memory_write_request_s
) *requests
,
898 enum flash_preserve_mode preserve_flash_p
,
899 void (*progress_cb
) (ULONGEST
, void *));
903 extern int inferior_has_forked (ptid_t pid
, ptid_t
*child_pid
);
905 extern int inferior_has_vforked (ptid_t pid
, ptid_t
*child_pid
);
907 extern int inferior_has_execd (ptid_t pid
, char **execd_pathname
);
909 extern int inferior_has_called_syscall (ptid_t pid
, int *syscall_number
);
911 /* Print a line about the current target. */
913 #define target_files_info() \
914 (*current_target.to_files_info) (¤t_target)
916 /* Insert a breakpoint at address BP_TGT->placed_address in the target
917 machine. Result is 0 for success, or an errno value. */
919 extern int target_insert_breakpoint (struct gdbarch
*gdbarch
,
920 struct bp_target_info
*bp_tgt
);
922 /* Remove a breakpoint at address BP_TGT->placed_address in the target
923 machine. Result is 0 for success, or an errno value. */
925 extern int target_remove_breakpoint (struct gdbarch
*gdbarch
,
926 struct bp_target_info
*bp_tgt
);
928 /* Initialize the terminal settings we record for the inferior,
929 before we actually run the inferior. */
931 #define target_terminal_init() \
932 (*current_target.to_terminal_init) ()
934 /* Put the inferior's terminal settings into effect.
935 This is preparation for starting or resuming the inferior. */
937 extern void target_terminal_inferior (void);
939 /* Put some of our terminal settings into effect,
940 enough to get proper results from our output,
941 but do not change into or out of RAW mode
942 so that no input is discarded.
944 After doing this, either terminal_ours or terminal_inferior
945 should be called to get back to a normal state of affairs. */
947 #define target_terminal_ours_for_output() \
948 (*current_target.to_terminal_ours_for_output) ()
950 /* Put our terminal settings into effect.
951 First record the inferior's terminal settings
952 so they can be restored properly later. */
954 #define target_terminal_ours() \
955 (*current_target.to_terminal_ours) ()
957 /* Save our terminal settings.
958 This is called from TUI after entering or leaving the curses
959 mode. Since curses modifies our terminal this call is here
960 to take this change into account. */
962 #define target_terminal_save_ours() \
963 (*current_target.to_terminal_save_ours) ()
965 /* Print useful information about our terminal status, if such a thing
968 #define target_terminal_info(arg, from_tty) \
969 (*current_target.to_terminal_info) (arg, from_tty)
971 /* Kill the inferior process. Make it go away. */
973 extern void target_kill (void);
975 /* Load an executable file into the target process. This is expected
976 to not only bring new code into the target process, but also to
977 update GDB's symbol tables to match.
979 ARG contains command-line arguments, to be broken down with
980 buildargv (). The first non-switch argument is the filename to
981 load, FILE; the second is a number (as parsed by strtoul (..., ...,
982 0)), which is an offset to apply to the load addresses of FILE's
983 sections. The target may define switches, or other non-switch
984 arguments, as it pleases. */
986 extern void target_load (char *arg
, int from_tty
);
988 /* Look up a symbol in the target's symbol table. NAME is the symbol
989 name. ADDRP is a CORE_ADDR * pointing to where the value of the
990 symbol should be returned. The result is 0 if successful, nonzero
991 if the symbol does not exist in the target environment. This
992 function should not call error() if communication with the target
993 is interrupted, since it is called from symbol reading, but should
994 return nonzero, possibly doing a complain(). */
996 #define target_lookup_symbol(name, addrp) \
997 (*current_target.to_lookup_symbol) (name, addrp)
999 /* Start an inferior process and set inferior_ptid to its pid.
1000 EXEC_FILE is the file to run.
1001 ALLARGS is a string containing the arguments to the program.
1002 ENV is the environment vector to pass. Errors reported with error().
1003 On VxWorks and various standalone systems, we ignore exec_file. */
1005 void target_create_inferior (char *exec_file
, char *args
,
1006 char **env
, int from_tty
);
1008 /* Some targets (such as ttrace-based HPUX) don't allow us to request
1009 notification of inferior events such as fork and vork immediately
1010 after the inferior is created. (This because of how gdb gets an
1011 inferior created via invoking a shell to do it. In such a scenario,
1012 if the shell init file has commands in it, the shell will fork and
1013 exec for each of those commands, and we will see each such fork
1016 Such targets will supply an appropriate definition for this function. */
1018 #define target_post_startup_inferior(ptid) \
1019 (*current_target.to_post_startup_inferior) (ptid)
1021 /* On some targets, the sequence of starting up an inferior requires
1022 some synchronization between gdb and the new inferior process, PID. */
1024 #define target_acknowledge_created_inferior(pid) \
1025 (*current_target.to_acknowledge_created_inferior) (pid)
1027 /* On some targets, we can catch an inferior fork or vfork event when
1028 it occurs. These functions insert/remove an already-created
1029 catchpoint for such events. */
1031 #define target_insert_fork_catchpoint(pid) \
1032 (*current_target.to_insert_fork_catchpoint) (pid)
1034 #define target_remove_fork_catchpoint(pid) \
1035 (*current_target.to_remove_fork_catchpoint) (pid)
1037 #define target_insert_vfork_catchpoint(pid) \
1038 (*current_target.to_insert_vfork_catchpoint) (pid)
1040 #define target_remove_vfork_catchpoint(pid) \
1041 (*current_target.to_remove_vfork_catchpoint) (pid)
1043 /* If the inferior forks or vforks, this function will be called at
1044 the next resume in order to perform any bookkeeping and fiddling
1045 necessary to continue debugging either the parent or child, as
1046 requested, and releasing the other. Information about the fork
1047 or vfork event is available via get_last_target_status ().
1048 This function returns 1 if the inferior should not be resumed
1049 (i.e. there is another event pending). */
1051 int target_follow_fork (int follow_child
);
1053 /* On some targets, we can catch an inferior exec event when it
1054 occurs. These functions insert/remove an already-created
1055 catchpoint for such events. */
1057 #define target_insert_exec_catchpoint(pid) \
1058 (*current_target.to_insert_exec_catchpoint) (pid)
1060 #define target_remove_exec_catchpoint(pid) \
1061 (*current_target.to_remove_exec_catchpoint) (pid)
1065 NEEDED is nonzero if any syscall catch (of any kind) is requested.
1066 If NEEDED is zero, it means the target can disable the mechanism to
1067 catch system calls because there are no more catchpoints of this type.
1069 ANY_COUNT is nonzero if a generic (filter-less) syscall catch is
1070 being requested. In this case, both TABLE_SIZE and TABLE should
1073 TABLE_SIZE is the number of elements in TABLE. It only matters if
1076 TABLE is an array of ints, indexed by syscall number. An element in
1077 this array is nonzero if that syscall should be caught. This argument
1078 only matters if ANY_COUNT is zero. */
1080 #define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
1081 (*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \
1084 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
1085 exit code of PID, if any. */
1087 #define target_has_exited(pid,wait_status,exit_status) \
1088 (*current_target.to_has_exited) (pid,wait_status,exit_status)
1090 /* The debugger has completed a blocking wait() call. There is now
1091 some process event that must be processed. This function should
1092 be defined by those targets that require the debugger to perform
1093 cleanup or internal state changes in response to the process event. */
1095 /* The inferior process has died. Do what is right. */
1097 void target_mourn_inferior (void);
1099 /* Does target have enough data to do a run or attach command? */
1101 #define target_can_run(t) \
1102 ((t)->to_can_run) ()
1104 /* post process changes to signal handling in the inferior. */
1106 #define target_notice_signals(ptid) \
1107 (*current_target.to_notice_signals) (ptid)
1109 /* Check to see if a thread is still alive. */
1111 extern int target_thread_alive (ptid_t ptid
);
1113 /* Query for new threads and add them to the thread list. */
1115 extern void target_find_new_threads (void);
1117 /* Make target stop in a continuable fashion. (For instance, under
1118 Unix, this should act like SIGSTOP). This function is normally
1119 used by GUIs to implement a stop button. */
1121 extern void target_stop (ptid_t ptid
);
1123 /* Send the specified COMMAND to the target's monitor
1124 (shell,interpreter) for execution. The result of the query is
1125 placed in OUTBUF. */
1127 #define target_rcmd(command, outbuf) \
1128 (*current_target.to_rcmd) (command, outbuf)
1131 /* Does the target include all of memory, or only part of it? This
1132 determines whether we look up the target chain for other parts of
1133 memory if this target can't satisfy a request. */
1135 extern int target_has_all_memory_1 (void);
1136 #define target_has_all_memory target_has_all_memory_1 ()
1138 /* Does the target include memory? (Dummy targets don't.) */
1140 extern int target_has_memory_1 (void);
1141 #define target_has_memory target_has_memory_1 ()
1143 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1144 we start a process.) */
1146 extern int target_has_stack_1 (void);
1147 #define target_has_stack target_has_stack_1 ()
1149 /* Does the target have registers? (Exec files don't.) */
1151 extern int target_has_registers_1 (void);
1152 #define target_has_registers target_has_registers_1 ()
1154 /* Does the target have execution? Can we make it jump (through
1155 hoops), or pop its stack a few times? This means that the current
1156 target is currently executing; for some targets, that's the same as
1157 whether or not the target is capable of execution, but there are
1158 also targets which can be current while not executing. In that
1159 case this will become true after target_create_inferior or
1162 extern int target_has_execution_1 (void);
1163 #define target_has_execution target_has_execution_1 ()
1165 /* Default implementations for process_stratum targets. Return true
1166 if there's a selected inferior, false otherwise. */
1168 extern int default_child_has_all_memory (struct target_ops
*ops
);
1169 extern int default_child_has_memory (struct target_ops
*ops
);
1170 extern int default_child_has_stack (struct target_ops
*ops
);
1171 extern int default_child_has_registers (struct target_ops
*ops
);
1172 extern int default_child_has_execution (struct target_ops
*ops
);
1174 /* Can the target support the debugger control of thread execution?
1175 Can it lock the thread scheduler? */
1177 #define target_can_lock_scheduler \
1178 (current_target.to_has_thread_control & tc_schedlock)
1180 /* Should the target enable async mode if it is supported? Temporary
1181 cludge until async mode is a strict superset of sync mode. */
1182 extern int target_async_permitted
;
1184 /* Can the target support asynchronous execution? */
1185 #define target_can_async_p() (current_target.to_can_async_p ())
1187 /* Is the target in asynchronous execution mode? */
1188 #define target_is_async_p() (current_target.to_is_async_p ())
1190 int target_supports_non_stop (void);
1192 /* Put the target in async mode with the specified callback function. */
1193 #define target_async(CALLBACK,CONTEXT) \
1194 (current_target.to_async ((CALLBACK), (CONTEXT)))
1196 /* This is to be used ONLY within call_function_by_hand(). It provides
1197 a workaround, to have inferior function calls done in sychronous
1198 mode, even though the target is asynchronous. After
1199 target_async_mask(0) is called, calls to target_can_async_p() will
1200 return FALSE , so that target_resume() will not try to start the
1201 target asynchronously. After the inferior stops, we IMMEDIATELY
1202 restore the previous nature of the target, by calling
1203 target_async_mask(1). After that, target_can_async_p() will return
1204 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1206 FIXME ezannoni 1999-12-13: we won't need this once we move
1207 the turning async on and off to the single execution commands,
1208 from where it is done currently, in remote_resume(). */
1210 #define target_async_mask(MASK) \
1211 (current_target.to_async_mask (MASK))
1213 /* Converts a process id to a string. Usually, the string just contains
1214 `process xyz', but on some systems it may contain
1215 `process xyz thread abc'. */
1217 extern char *target_pid_to_str (ptid_t ptid
);
1219 extern char *normal_pid_to_str (ptid_t ptid
);
1221 /* Return a short string describing extra information about PID,
1222 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1225 #define target_extra_thread_info(TP) \
1226 (current_target.to_extra_thread_info (TP))
1228 /* Attempts to find the pathname of the executable file
1229 that was run to create a specified process.
1231 The process PID must be stopped when this operation is used.
1233 If the executable file cannot be determined, NULL is returned.
1235 Else, a pointer to a character string containing the pathname
1236 is returned. This string should be copied into a buffer by
1237 the client if the string will not be immediately used, or if
1240 #define target_pid_to_exec_file(pid) \
1241 (current_target.to_pid_to_exec_file) (pid)
1243 /* See the to_thread_architecture description in struct target_ops. */
1245 #define target_thread_architecture(ptid) \
1246 (current_target.to_thread_architecture (¤t_target, ptid))
1249 * Iterator function for target memory regions.
1250 * Calls a callback function once for each memory region 'mapped'
1251 * in the child process. Defined as a simple macro rather than
1252 * as a function macro so that it can be tested for nullity.
1255 #define target_find_memory_regions(FUNC, DATA) \
1256 (current_target.to_find_memory_regions) (FUNC, DATA)
1259 * Compose corefile .note section.
1262 #define target_make_corefile_notes(BFD, SIZE_P) \
1263 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1265 /* Bookmark interfaces. */
1266 #define target_get_bookmark(ARGS, FROM_TTY) \
1267 (current_target.to_get_bookmark) (ARGS, FROM_TTY)
1269 #define target_goto_bookmark(ARG, FROM_TTY) \
1270 (current_target.to_goto_bookmark) (ARG, FROM_TTY)
1272 /* Hardware watchpoint interfaces. */
1274 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1275 write). Only the INFERIOR_PTID task is being queried. */
1277 #define target_stopped_by_watchpoint \
1278 (*current_target.to_stopped_by_watchpoint)
1280 /* Non-zero if we have steppable watchpoints */
1282 #define target_have_steppable_watchpoint \
1283 (current_target.to_have_steppable_watchpoint)
1285 /* Non-zero if we have continuable watchpoints */
1287 #define target_have_continuable_watchpoint \
1288 (current_target.to_have_continuable_watchpoint)
1290 /* Provide defaults for hardware watchpoint functions. */
1292 /* If the *_hw_beakpoint functions have not been defined
1293 elsewhere use the definitions in the target vector. */
1295 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1296 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1297 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1298 (including this one?). OTHERTYPE is who knows what... */
1300 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
1301 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1303 #define target_region_ok_for_hw_watchpoint(addr, len) \
1304 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1307 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes.
1308 TYPE is 0 for write, 1 for read, and 2 for read/write accesses.
1309 COND is the expression for its condition, or NULL if there's none.
1310 Returns 0 for success, 1 if the watchpoint type is not supported,
1313 #define target_insert_watchpoint(addr, len, type, cond) \
1314 (*current_target.to_insert_watchpoint) (addr, len, type, cond)
1316 #define target_remove_watchpoint(addr, len, type, cond) \
1317 (*current_target.to_remove_watchpoint) (addr, len, type, cond)
1319 #define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
1320 (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt)
1322 #define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
1323 (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt)
1325 /* Return non-zero if target knows the data address which triggered this
1326 target_stopped_by_watchpoint, in such case place it to *ADDR_P. Only the
1327 INFERIOR_PTID task is being queried. */
1328 #define target_stopped_data_address(target, addr_p) \
1329 (*target.to_stopped_data_address) (target, addr_p)
1331 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1332 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1334 /* Return non-zero if the target is capable of using hardware to evaluate
1335 the condition expression. In this case, if the condition is false when
1336 the watched memory location changes, execution may continue without the
1337 debugger being notified.
1339 Due to limitations in the hardware implementation, it may be capable of
1340 avoiding triggering the watchpoint in some cases where the condition
1341 expression is false, but may report some false positives as well.
1342 For this reason, GDB will still evaluate the condition expression when
1343 the watchpoint triggers. */
1344 #define target_can_accel_watchpoint_condition(addr, len, type, cond) \
1345 (*current_target.to_can_accel_watchpoint_condition) (addr, len, type, cond)
1347 /* Target can execute in reverse? */
1348 #define target_can_execute_reverse \
1349 (current_target.to_can_execute_reverse ? \
1350 current_target.to_can_execute_reverse () : 0)
1352 extern const struct target_desc
*target_read_description (struct target_ops
*);
1354 #define target_get_ada_task_ptid(lwp, tid) \
1355 (*current_target.to_get_ada_task_ptid) (lwp,tid)
1357 /* Utility implementation of searching memory. */
1358 extern int simple_search_memory (struct target_ops
* ops
,
1359 CORE_ADDR start_addr
,
1360 ULONGEST search_space_len
,
1361 const gdb_byte
*pattern
,
1362 ULONGEST pattern_len
,
1363 CORE_ADDR
*found_addrp
);
1365 /* Main entry point for searching memory. */
1366 extern int target_search_memory (CORE_ADDR start_addr
,
1367 ULONGEST search_space_len
,
1368 const gdb_byte
*pattern
,
1369 ULONGEST pattern_len
,
1370 CORE_ADDR
*found_addrp
);
1372 /* Tracepoint-related operations. */
1374 #define target_trace_init() \
1375 (*current_target.to_trace_init) ()
1377 #define target_download_tracepoint(t) \
1378 (*current_target.to_download_tracepoint) (t)
1380 #define target_download_trace_state_variable(tsv) \
1381 (*current_target.to_download_trace_state_variable) (tsv)
1383 #define target_trace_start() \
1384 (*current_target.to_trace_start) ()
1386 #define target_trace_set_readonly_regions() \
1387 (*current_target.to_trace_set_readonly_regions) ()
1389 #define target_get_trace_status(ts) \
1390 (*current_target.to_get_trace_status) (ts)
1392 #define target_trace_stop() \
1393 (*current_target.to_trace_stop) ()
1395 #define target_trace_find(type,num,addr1,addr2,tpp) \
1396 (*current_target.to_trace_find) ((type), (num), (addr1), (addr2), (tpp))
1398 #define target_get_trace_state_variable_value(tsv,val) \
1399 (*current_target.to_get_trace_state_variable_value) ((tsv), (val))
1401 #define target_save_trace_data(filename) \
1402 (*current_target.to_save_trace_data) (filename)
1404 #define target_upload_tracepoints(utpp) \
1405 (*current_target.to_upload_tracepoints) (utpp)
1407 #define target_upload_trace_state_variables(utsvp) \
1408 (*current_target.to_upload_trace_state_variables) (utsvp)
1410 #define target_get_raw_trace_data(buf,offset,len) \
1411 (*current_target.to_get_raw_trace_data) ((buf), (offset), (len))
1413 #define target_set_disconnected_tracing(val) \
1414 (*current_target.to_set_disconnected_tracing) (val)
1416 #define target_set_circular_trace_buffer(val) \
1417 (*current_target.to_set_circular_trace_buffer) (val)
1419 #define target_get_tib_address(ptid, addr) \
1420 (*current_target.to_get_tib_address) ((ptid), (addr))
1422 #define target_set_permissions() \
1423 (*current_target.to_set_permissions) ()
1425 #define target_static_tracepoint_marker_at(addr, marker) \
1426 (*current_target.to_static_tracepoint_marker_at) (addr, marker)
1428 #define target_static_tracepoint_markers_by_strid(marker_id) \
1429 (*current_target.to_static_tracepoint_markers_by_strid) (marker_id)
1431 /* Command logging facility. */
1433 #define target_log_command(p) \
1435 if (current_target.to_log_command) \
1436 (*current_target.to_log_command) (p); \
1440 extern int target_core_of_thread (ptid_t ptid
);
1442 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range matches
1443 the contents of [DATA,DATA+SIZE). Returns 1 if there's a match, 0
1444 if there's a mismatch, and -1 if an error is encountered while
1445 reading memory. Throws an error if the functionality is found not
1446 to be supported by the current target. */
1447 int target_verify_memory (const gdb_byte
*data
,
1448 CORE_ADDR memaddr
, ULONGEST size
);
1450 /* Routines for maintenance of the target structures...
1452 add_target: Add a target to the list of all possible targets.
1454 push_target: Make this target the top of the stack of currently used
1455 targets, within its particular stratum of the stack. Result
1456 is 0 if now atop the stack, nonzero if not on top (maybe
1459 unpush_target: Remove this from the stack of currently used targets,
1460 no matter where it is on the list. Returns 0 if no
1461 change, 1 if removed from stack.
1463 pop_target: Remove the top thing on the stack of current targets. */
1465 extern void add_target (struct target_ops
*);
1467 extern void push_target (struct target_ops
*);
1469 extern int unpush_target (struct target_ops
*);
1471 extern void target_pre_inferior (int);
1473 extern void target_preopen (int);
1475 extern void pop_target (void);
1477 /* Does whatever cleanup is required to get rid of all pushed targets.
1478 QUITTING is propagated to target_close; it indicates that GDB is
1479 exiting and should not get hung on an error (otherwise it is
1480 important to perform clean termination, even if it takes a
1482 extern void pop_all_targets (int quitting
);
1484 /* Like pop_all_targets, but pops only targets whose stratum is
1485 strictly above ABOVE_STRATUM. */
1486 extern void pop_all_targets_above (enum strata above_stratum
, int quitting
);
1488 extern CORE_ADDR
target_translate_tls_address (struct objfile
*objfile
,
1491 /* Struct target_section maps address ranges to file sections. It is
1492 mostly used with BFD files, but can be used without (e.g. for handling
1493 raw disks, or files not in formats handled by BFD). */
1495 struct target_section
1497 CORE_ADDR addr
; /* Lowest address in section */
1498 CORE_ADDR endaddr
; /* 1+highest address in section */
1500 struct bfd_section
*the_bfd_section
;
1502 bfd
*bfd
; /* BFD file pointer */
1505 /* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
1507 struct target_section_table
1509 struct target_section
*sections
;
1510 struct target_section
*sections_end
;
1513 /* Return the "section" containing the specified address. */
1514 struct target_section
*target_section_by_addr (struct target_ops
*target
,
1517 /* Return the target section table this target (or the targets
1518 beneath) currently manipulate. */
1520 extern struct target_section_table
*target_get_section_table
1521 (struct target_ops
*target
);
1523 /* From mem-break.c */
1525 extern int memory_remove_breakpoint (struct gdbarch
*, struct bp_target_info
*);
1527 extern int memory_insert_breakpoint (struct gdbarch
*, struct bp_target_info
*);
1529 extern int default_memory_remove_breakpoint (struct gdbarch
*, struct bp_target_info
*);
1531 extern int default_memory_insert_breakpoint (struct gdbarch
*, struct bp_target_info
*);
1536 extern void initialize_targets (void);
1538 extern void noprocess (void) ATTRIBUTE_NORETURN
;
1540 extern void target_require_runnable (void);
1542 extern void find_default_attach (struct target_ops
*, char *, int);
1544 extern void find_default_create_inferior (struct target_ops
*,
1545 char *, char *, char **, int);
1547 extern struct target_ops
*find_run_target (void);
1549 extern struct target_ops
*find_core_target (void);
1551 extern struct target_ops
*find_target_beneath (struct target_ops
*);
1553 /* Read OS data object of type TYPE from the target, and return it in
1554 XML format. The result is NUL-terminated and returned as a string,
1555 allocated using xmalloc. If an error occurs or the transfer is
1556 unsupported, NULL is returned. Empty objects are returned as
1557 allocated but empty strings. */
1559 extern char *target_get_osdata (const char *type
);
1562 /* Stuff that should be shared among the various remote targets. */
1564 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1565 information (higher values, more information). */
1566 extern int remote_debug
;
1568 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1569 extern int baud_rate
;
1570 /* Timeout limit for response from target. */
1571 extern int remote_timeout
;
1574 /* Functions for helping to write a native target. */
1576 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1577 extern void store_waitstatus (struct target_waitstatus
*, int);
1579 /* These are in common/signals.c, but they're only used by gdb. */
1580 extern enum target_signal
default_target_signal_from_host (struct gdbarch
*,
1582 extern int default_target_signal_to_host (struct gdbarch
*,
1583 enum target_signal
);
1585 /* Convert from a number used in a GDB command to an enum target_signal. */
1586 extern enum target_signal
target_signal_from_command (int);
1587 /* End of files in common/signals.c. */
1589 /* Set the show memory breakpoints mode to show, and installs a cleanup
1590 to restore it back to the current value. */
1591 extern struct cleanup
*make_show_memory_breakpoints_cleanup (int show
);
1593 extern int may_write_registers
;
1594 extern int may_write_memory
;
1595 extern int may_insert_breakpoints
;
1596 extern int may_insert_tracepoints
;
1597 extern int may_insert_fast_tracepoints
;
1598 extern int may_stop
;
1600 extern void update_target_permissions (void);
1603 /* Imported from machine dependent code */
1605 /* Blank target vector entries are initialized to target_ignore. */
1606 void target_ignore (void);
1608 extern struct target_ops deprecated_child_ops
;
1610 #endif /* !defined (TARGET_H) */