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;
36 /* This include file defines the interface between the main part
37 of the debugger, and the part which is target-specific, or
38 specific to the communications interface between us and the
41 A TARGET is an interface between the debugger and a particular
42 kind of file or process. Targets can be STACKED in STRATA,
43 so that more than one target can potentially respond to a request.
44 In particular, memory accesses will walk down the stack of targets
45 until they find a target that is interested in handling that particular
46 address. STRATA are artificial boundaries on the stack, within
47 which particular kinds of targets live. Strata exist so that
48 people don't get confused by pushing e.g. a process target and then
49 a file target, and wondering why they can't see the current values
50 of variables any more (the file target is handling them and they
51 never get to the process target). So when you push a file target,
52 it goes into the file stratum, which is always below the process
59 #include "gdb_signals.h"
63 dummy_stratum, /* The lowest of the low */
64 file_stratum, /* Executable files, etc */
65 core_stratum, /* Core dump files */
66 process_stratum, /* Executing processes */
67 thread_stratum, /* Executing threads */
68 record_stratum, /* Support record debugging */
69 arch_stratum /* Architecture overrides */
72 enum thread_control_capabilities
74 tc_none = 0, /* Default: can't control thread execution. */
75 tc_schedlock = 1, /* Can lock the thread scheduler. */
78 /* Stuff for target_wait. */
80 /* Generally, what has the program done? */
83 /* The program has exited. The exit status is in value.integer. */
84 TARGET_WAITKIND_EXITED,
86 /* The program has stopped with a signal. Which signal is in
88 TARGET_WAITKIND_STOPPED,
90 /* The program has terminated with a signal. Which signal is in
92 TARGET_WAITKIND_SIGNALLED,
94 /* The program is letting us know that it dynamically loaded something
95 (e.g. it called load(2) on AIX). */
96 TARGET_WAITKIND_LOADED,
98 /* The program has forked. A "related" process' PTID is in
99 value.related_pid. I.e., if the child forks, value.related_pid
100 is the parent's ID. */
102 TARGET_WAITKIND_FORKED,
104 /* The program has vforked. A "related" process's PTID is in
105 value.related_pid. */
107 TARGET_WAITKIND_VFORKED,
109 /* The program has exec'ed a new executable file. The new file's
110 pathname is pointed to by value.execd_pathname. */
112 TARGET_WAITKIND_EXECD,
114 /* The program had previously vforked, and now the child is done
115 with the shared memory region, because it exec'ed or exited.
116 Note that the event is reported to the vfork parent. This is
117 only used if GDB did not stay attached to the vfork child,
118 otherwise, a TARGET_WAITKIND_EXECD or
119 TARGET_WAITKIND_EXIT|SIGNALLED event associated with the child
120 has the same effect. */
121 TARGET_WAITKIND_VFORK_DONE,
123 /* The program has entered or returned from a system call. On
124 HP-UX, this is used in the hardware watchpoint implementation.
125 The syscall's unique integer ID number is in value.syscall_id */
127 TARGET_WAITKIND_SYSCALL_ENTRY,
128 TARGET_WAITKIND_SYSCALL_RETURN,
130 /* Nothing happened, but we stopped anyway. This perhaps should be handled
131 within target_wait, but I'm not sure target_wait should be resuming the
133 TARGET_WAITKIND_SPURIOUS,
135 /* An event has occured, but we should wait again.
136 Remote_async_wait() returns this when there is an event
137 on the inferior, but the rest of the world is not interested in
138 it. The inferior has not stopped, but has just sent some output
139 to the console, for instance. In this case, we want to go back
140 to the event loop and wait there for another event from the
141 inferior, rather than being stuck in the remote_async_wait()
142 function. This way the event loop is responsive to other events,
143 like for instance the user typing. */
144 TARGET_WAITKIND_IGNORE,
146 /* The target has run out of history information,
147 and cannot run backward any further. */
148 TARGET_WAITKIND_NO_HISTORY
151 struct target_waitstatus
153 enum target_waitkind kind;
155 /* Forked child pid, execd pathname, exit status, signal number or
160 enum target_signal sig;
162 char *execd_pathname;
168 /* Options that can be passed to target_wait. */
170 /* Return immediately if there's no event already queued. If this
171 options is not requested, target_wait blocks waiting for an
173 #define TARGET_WNOHANG 1
175 /* The structure below stores information about a system call.
176 It is basically used in the "catch syscall" command, and in
177 every function that gives information about a system call.
179 It's also good to mention that its fields represent everything
180 that we currently know about a syscall in GDB. */
183 /* The syscall number. */
186 /* The syscall name. */
190 /* Return a pretty printed form of target_waitstatus.
191 Space for the result is malloc'd, caller must free. */
192 extern char *target_waitstatus_to_string (const struct target_waitstatus *);
194 /* Possible types of events that the inferior handler will have to
196 enum inferior_event_type
198 /* There is a request to quit the inferior, abandon it. */
200 /* Process a normal inferior event which will result in target_wait
203 /* Deal with an error on the inferior. */
205 /* We are called because a timer went off. */
207 /* We are called to do stuff after the inferior stops. */
209 /* We are called to do some stuff after the inferior stops, but we
210 are expected to reenter the proceed() and
211 handle_inferior_event() functions. This is used only in case of
212 'step n' like commands. */
216 /* Target objects which can be transfered using target_read,
217 target_write, et cetera. */
221 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
223 /* SPU target specific transfer. See "spu-tdep.c". */
225 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
226 TARGET_OBJECT_MEMORY,
227 /* Memory, avoiding GDB's data cache and trusting the executable.
228 Target implementations of to_xfer_partial never need to handle
229 this object, and most callers should not use it. */
230 TARGET_OBJECT_RAW_MEMORY,
231 /* Memory known to be part of the target's stack. This is cached even
232 if it is not in a region marked as such, since it is known to be
234 TARGET_OBJECT_STACK_MEMORY,
235 /* Kernel Unwind Table. See "ia64-tdep.c". */
236 TARGET_OBJECT_UNWIND_TABLE,
237 /* Transfer auxilliary vector. */
239 /* StackGhost cookie. See "sparc-tdep.c". */
240 TARGET_OBJECT_WCOOKIE,
241 /* Target memory map in XML format. */
242 TARGET_OBJECT_MEMORY_MAP,
243 /* Flash memory. This object can be used to write contents to
244 a previously erased flash memory. Using it without erasing
245 flash can have unexpected results. Addresses are physical
246 address on target, and not relative to flash start. */
248 /* Available target-specific features, e.g. registers and coprocessors.
249 See "target-descriptions.c". ANNEX should never be empty. */
250 TARGET_OBJECT_AVAILABLE_FEATURES,
251 /* Currently loaded libraries, in XML format. */
252 TARGET_OBJECT_LIBRARIES,
253 /* Get OS specific data. The ANNEX specifies the type (running
255 TARGET_OBJECT_OSDATA,
256 /* Extra signal info. Usually the contents of `siginfo_t' on unix
258 TARGET_OBJECT_SIGNAL_INFO,
259 /* Possible future objects: TARGET_OBJECT_FILE, ... */
262 /* Enumeration of the kinds of traceframe searches that a target may
263 be able to perform. */
274 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
275 OBJECT. The OFFSET, for a seekable object, specifies the
276 starting point. The ANNEX can be used to provide additional
277 data-specific information to the target.
279 Return the number of bytes actually transfered, or -1 if the
280 transfer is not supported or otherwise fails. Return of a positive
281 value less than LEN indicates that no further transfer is possible.
282 Unlike the raw to_xfer_partial interface, callers of these
283 functions do not need to retry partial transfers. */
285 extern LONGEST target_read (struct target_ops *ops,
286 enum target_object object,
287 const char *annex, gdb_byte *buf,
288 ULONGEST offset, LONGEST len);
290 extern LONGEST target_read_until_error (struct target_ops *ops,
291 enum target_object object,
292 const char *annex, gdb_byte *buf,
293 ULONGEST offset, LONGEST len);
295 extern LONGEST target_write (struct target_ops *ops,
296 enum target_object object,
297 const char *annex, const gdb_byte *buf,
298 ULONGEST offset, LONGEST len);
300 /* Similar to target_write, except that it also calls PROGRESS with
301 the number of bytes written and the opaque BATON after every
302 successful partial write (and before the first write). This is
303 useful for progress reporting and user interaction while writing
304 data. To abort the transfer, the progress callback can throw an
307 LONGEST target_write_with_progress (struct target_ops *ops,
308 enum target_object object,
309 const char *annex, const gdb_byte *buf,
310 ULONGEST offset, LONGEST len,
311 void (*progress) (ULONGEST, void *),
314 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
315 be read using OPS. The return value will be -1 if the transfer
316 fails or is not supported; 0 if the object is empty; or the length
317 of the object otherwise. If a positive value is returned, a
318 sufficiently large buffer will be allocated using xmalloc and
319 returned in *BUF_P containing the contents of the object.
321 This method should be used for objects sufficiently small to store
322 in a single xmalloc'd buffer, when no fixed bound on the object's
323 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
324 through this function. */
326 extern LONGEST target_read_alloc (struct target_ops *ops,
327 enum target_object object,
328 const char *annex, gdb_byte **buf_p);
330 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
331 returned as a string, allocated using xmalloc. If an error occurs
332 or the transfer is unsupported, NULL is returned. Empty objects
333 are returned as allocated but empty strings. A warning is issued
334 if the result contains any embedded NUL bytes. */
336 extern char *target_read_stralloc (struct target_ops *ops,
337 enum target_object object,
340 /* Wrappers to target read/write that perform memory transfers. They
341 throw an error if the memory transfer fails.
343 NOTE: cagney/2003-10-23: The naming schema is lifted from
344 "frame.h". The parameter order is lifted from get_frame_memory,
345 which in turn lifted it from read_memory. */
347 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
348 gdb_byte *buf, LONGEST len);
349 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
350 CORE_ADDR addr, int len,
351 enum bfd_endian byte_order);
353 struct thread_info; /* fwd decl for parameter list below: */
357 struct target_ops *beneath; /* To the target under this one. */
358 char *to_shortname; /* Name this target type */
359 char *to_longname; /* Name for printing */
360 char *to_doc; /* Documentation. Does not include trailing
361 newline, and starts with a one-line descrip-
362 tion (probably similar to to_longname). */
363 /* Per-target scratch pad. */
365 /* The open routine takes the rest of the parameters from the
366 command, and (if successful) pushes a new target onto the
367 stack. Targets should supply this routine, if only to provide
369 void (*to_open) (char *, int);
370 /* Old targets with a static target vector provide "to_close".
371 New re-entrant targets provide "to_xclose" and that is expected
372 to xfree everything (including the "struct target_ops"). */
373 void (*to_xclose) (struct target_ops *targ, int quitting);
374 void (*to_close) (int);
375 void (*to_attach) (struct target_ops *ops, char *, int);
376 void (*to_post_attach) (int);
377 void (*to_detach) (struct target_ops *ops, char *, int);
378 void (*to_disconnect) (struct target_ops *, char *, int);
379 void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal);
380 ptid_t (*to_wait) (struct target_ops *,
381 ptid_t, struct target_waitstatus *, int);
382 void (*to_fetch_registers) (struct target_ops *, struct regcache *, int);
383 void (*to_store_registers) (struct target_ops *, struct regcache *, int);
384 void (*to_prepare_to_store) (struct regcache *);
386 /* Transfer LEN bytes of memory between GDB address MYADDR and
387 target address MEMADDR. If WRITE, transfer them to the target, else
388 transfer them from the target. TARGET is the target from which we
391 Return value, N, is one of the following:
393 0 means that we can't handle this. If errno has been set, it is the
394 error which prevented us from doing it (FIXME: What about bfd_error?).
396 positive (call it N) means that we have transferred N bytes
397 starting at MEMADDR. We might be able to handle more bytes
398 beyond this length, but no promises.
400 negative (call its absolute value N) means that we cannot
401 transfer right at MEMADDR, but we could transfer at least
402 something at MEMADDR + N.
404 NOTE: cagney/2004-10-01: This has been entirely superseeded by
405 to_xfer_partial and inferior inheritance. */
407 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
409 struct mem_attrib *attrib,
410 struct target_ops *target);
412 void (*to_files_info) (struct target_ops *);
413 int (*to_insert_breakpoint) (struct gdbarch *, struct bp_target_info *);
414 int (*to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *);
415 int (*to_can_use_hw_breakpoint) (int, int, int);
416 int (*to_insert_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
417 int (*to_remove_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
418 int (*to_remove_watchpoint) (CORE_ADDR, int, int);
419 int (*to_insert_watchpoint) (CORE_ADDR, int, int);
420 int (*to_stopped_by_watchpoint) (void);
421 int to_have_steppable_watchpoint;
422 int to_have_continuable_watchpoint;
423 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
424 int (*to_watchpoint_addr_within_range) (struct target_ops *,
425 CORE_ADDR, CORE_ADDR, int);
426 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
427 void (*to_terminal_init) (void);
428 void (*to_terminal_inferior) (void);
429 void (*to_terminal_ours_for_output) (void);
430 void (*to_terminal_ours) (void);
431 void (*to_terminal_save_ours) (void);
432 void (*to_terminal_info) (char *, int);
433 void (*to_kill) (struct target_ops *);
434 void (*to_load) (char *, int);
435 int (*to_lookup_symbol) (char *, CORE_ADDR *);
436 void (*to_create_inferior) (struct target_ops *,
437 char *, char *, char **, int);
438 void (*to_post_startup_inferior) (ptid_t);
439 void (*to_acknowledge_created_inferior) (int);
440 void (*to_insert_fork_catchpoint) (int);
441 int (*to_remove_fork_catchpoint) (int);
442 void (*to_insert_vfork_catchpoint) (int);
443 int (*to_remove_vfork_catchpoint) (int);
444 int (*to_follow_fork) (struct target_ops *, int);
445 void (*to_insert_exec_catchpoint) (int);
446 int (*to_remove_exec_catchpoint) (int);
447 int (*to_set_syscall_catchpoint) (int, int, int, int, int *);
448 int (*to_has_exited) (int, int, int *);
449 void (*to_mourn_inferior) (struct target_ops *);
450 int (*to_can_run) (void);
451 void (*to_notice_signals) (ptid_t ptid);
452 int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
453 void (*to_find_new_threads) (struct target_ops *);
454 char *(*to_pid_to_str) (struct target_ops *, ptid_t);
455 char *(*to_extra_thread_info) (struct thread_info *);
456 void (*to_stop) (ptid_t);
457 void (*to_rcmd) (char *command, struct ui_file *output);
458 char *(*to_pid_to_exec_file) (int pid);
459 void (*to_log_command) (const char *);
460 struct target_section_table *(*to_get_section_table) (struct target_ops *);
461 enum strata to_stratum;
462 int (*to_has_all_memory) (struct target_ops *);
463 int (*to_has_memory) (struct target_ops *);
464 int (*to_has_stack) (struct target_ops *);
465 int (*to_has_registers) (struct target_ops *);
466 int (*to_has_execution) (struct target_ops *);
467 int to_has_thread_control; /* control thread execution */
468 int to_attach_no_wait;
469 /* ASYNC target controls */
470 int (*to_can_async_p) (void);
471 int (*to_is_async_p) (void);
472 void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
473 int (*to_async_mask) (int);
474 int (*to_supports_non_stop) (void);
475 /* find_memory_regions support method for gcore */
476 int (*to_find_memory_regions) (int (*) (CORE_ADDR,
481 /* make_corefile_notes support method for gcore */
482 char * (*to_make_corefile_notes) (bfd *, int *);
483 /* get_bookmark support method for bookmarks */
484 gdb_byte * (*to_get_bookmark) (char *, int);
485 /* goto_bookmark support method for bookmarks */
486 void (*to_goto_bookmark) (gdb_byte *, int);
487 /* Return the thread-local address at OFFSET in the
488 thread-local storage for the thread PTID and the shared library
489 or executable file given by OBJFILE. If that block of
490 thread-local storage hasn't been allocated yet, this function
491 may return an error. */
492 CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
494 CORE_ADDR load_module_addr,
497 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
498 OBJECT. The OFFSET, for a seekable object, specifies the
499 starting point. The ANNEX can be used to provide additional
500 data-specific information to the target.
502 Return the number of bytes actually transfered, zero when no
503 further transfer is possible, and -1 when the transfer is not
504 supported. Return of a positive value smaller than LEN does
505 not indicate the end of the object, only the end of the
506 transfer; higher level code should continue transferring if
507 desired. This is handled in target.c.
509 The interface does not support a "retry" mechanism. Instead it
510 assumes that at least one byte will be transfered on each
513 NOTE: cagney/2003-10-17: The current interface can lead to
514 fragmented transfers. Lower target levels should not implement
515 hacks, such as enlarging the transfer, in an attempt to
516 compensate for this. Instead, the target stack should be
517 extended so that it implements supply/collect methods and a
518 look-aside object cache. With that available, the lowest
519 target can safely and freely "push" data up the stack.
521 See target_read and target_write for more information. One,
522 and only one, of readbuf or writebuf must be non-NULL. */
524 LONGEST (*to_xfer_partial) (struct target_ops *ops,
525 enum target_object object, const char *annex,
526 gdb_byte *readbuf, const gdb_byte *writebuf,
527 ULONGEST offset, LONGEST len);
529 /* Returns the memory map for the target. A return value of NULL
530 means that no memory map is available. If a memory address
531 does not fall within any returned regions, it's assumed to be
532 RAM. The returned memory regions should not overlap.
534 The order of regions does not matter; target_memory_map will
535 sort regions by starting address. For that reason, this
536 function should not be called directly except via
539 This method should not cache data; if the memory map could
540 change unexpectedly, it should be invalidated, and higher
541 layers will re-fetch it. */
542 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
544 /* Erases the region of flash memory starting at ADDRESS, of
547 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
548 on flash block boundaries, as reported by 'to_memory_map'. */
549 void (*to_flash_erase) (struct target_ops *,
550 ULONGEST address, LONGEST length);
552 /* Finishes a flash memory write sequence. After this operation
553 all flash memory should be available for writing and the result
554 of reading from areas written by 'to_flash_write' should be
555 equal to what was written. */
556 void (*to_flash_done) (struct target_ops *);
558 /* Describe the architecture-specific features of this target.
559 Returns the description found, or NULL if no description
561 const struct target_desc *(*to_read_description) (struct target_ops *ops);
563 /* Build the PTID of the thread on which a given task is running,
564 based on LWP and THREAD. These values are extracted from the
565 task Private_Data section of the Ada Task Control Block, and
566 their interpretation depends on the target. */
567 ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
569 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
570 Return 0 if *READPTR is already at the end of the buffer.
571 Return -1 if there is insufficient buffer for a whole entry.
572 Return 1 if an entry was read into *TYPEP and *VALP. */
573 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
574 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
576 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
577 sequence of bytes in PATTERN with length PATTERN_LEN.
579 The result is 1 if found, 0 if not found, and -1 if there was an error
580 requiring halting of the search (e.g. memory read error).
581 If the pattern is found the address is recorded in FOUND_ADDRP. */
582 int (*to_search_memory) (struct target_ops *ops,
583 CORE_ADDR start_addr, ULONGEST search_space_len,
584 const gdb_byte *pattern, ULONGEST pattern_len,
585 CORE_ADDR *found_addrp);
587 /* Can target execute in reverse? */
588 int (*to_can_execute_reverse) (void);
590 /* Does this target support debugging multiple processes
592 int (*to_supports_multi_process) (void);
594 /* Determine current architecture of thread PTID.
596 The target is supposed to determine the architecture of the code where
597 the target is currently stopped at (on Cell, if a target is in spu_run,
598 to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
599 This is architecture used to perform decr_pc_after_break adjustment,
600 and also determines the frame architecture of the innermost frame.
601 ptrace operations need to operate according to target_gdbarch.
603 The default implementation always returns target_gdbarch. */
604 struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t);
606 /* Determine current address space of thread PTID.
608 The default implementation always returns the inferior's
610 struct address_space *(*to_thread_address_space) (struct target_ops *,
613 /* Tracepoint-related operations. */
615 /* Prepare the target for a tracing run. */
616 void (*to_trace_init) (void);
618 /* Send full details of a tracepoint to the target. */
619 void (*to_download_tracepoint) (struct breakpoint *t);
621 /* Send full details of a trace state variable to the target. */
622 void (*to_download_trace_state_variable) (struct trace_state_variable *tsv);
624 /* Inform the target info of memory regions that are readonly
625 (such as text sections), and so it should return data from
626 those rather than look in the trace buffer. */
627 void (*to_trace_set_readonly_regions) (void);
629 /* Start a trace run. */
630 void (*to_trace_start) (void);
632 /* Get the current status of a tracing run. */
633 int (*to_get_trace_status) (int *stop_reason);
635 /* Stop a trace run. */
636 void (*to_trace_stop) (void);
638 /* Ask the target to find a trace frame of the given type TYPE,
639 using NUM, ADDR1, and ADDR2 as search parameters. Returns the
640 number of the trace frame, and also the tracepoint number at
642 int (*to_trace_find) (enum trace_find_type type, int num,
643 ULONGEST addr1, ULONGEST addr2, int *tpp);
645 /* Get the value of the trace state variable number TSV, returning
646 1 if the value is known and writing the value itself into the
647 location pointed to by VAL, else returning 0. */
648 int (*to_get_trace_state_variable_value) (int tsv, LONGEST *val);
650 /* Set the target's tracing behavior in response to unexpected
651 disconnection - set VAL to 1 to keep tracing, 0 to stop. */
652 void (*to_set_disconnected_tracing) (int val);
655 /* Need sub-structure for target machine related rather than comm related?
659 /* Magic number for checking ops size. If a struct doesn't end with this
660 number, somebody changed the declaration but didn't change all the
661 places that initialize one. */
663 #define OPS_MAGIC 3840
665 /* The ops structure for our "current" target process. This should
666 never be NULL. If there is no target, it points to the dummy_target. */
668 extern struct target_ops current_target;
670 /* Define easy words for doing these operations on our current target. */
672 #define target_shortname (current_target.to_shortname)
673 #define target_longname (current_target.to_longname)
675 /* Does whatever cleanup is required for a target that we are no
676 longer going to be calling. QUITTING indicates that GDB is exiting
677 and should not get hung on an error (otherwise it is important to
678 perform clean termination, even if it takes a while). This routine
679 is automatically always called when popping the target off the
680 target stack (to_beneath is undefined). Closing file descriptors
681 and freeing all memory allocated memory are typical things it
684 void target_close (struct target_ops *targ, int quitting);
686 /* Attaches to a process on the target side. Arguments are as passed
687 to the `attach' command by the user. This routine can be called
688 when the target is not on the target-stack, if the target_can_run
689 routine returns 1; in that case, it must push itself onto the stack.
690 Upon exit, the target should be ready for normal operations, and
691 should be ready to deliver the status of the process immediately
692 (without waiting) to an upcoming target_wait call. */
694 void target_attach (char *, int);
696 /* Some targets don't generate traps when attaching to the inferior,
697 or their target_attach implementation takes care of the waiting.
698 These targets must set to_attach_no_wait. */
700 #define target_attach_no_wait \
701 (current_target.to_attach_no_wait)
703 /* The target_attach operation places a process under debugger control,
704 and stops the process.
706 This operation provides a target-specific hook that allows the
707 necessary bookkeeping to be performed after an attach completes. */
708 #define target_post_attach(pid) \
709 (*current_target.to_post_attach) (pid)
711 /* Takes a program previously attached to and detaches it.
712 The program may resume execution (some targets do, some don't) and will
713 no longer stop on signals, etc. We better not have left any breakpoints
714 in the program or it'll die when it hits one. ARGS is arguments
715 typed by the user (e.g. a signal to send the process). FROM_TTY
716 says whether to be verbose or not. */
718 extern void target_detach (char *, int);
720 /* Disconnect from the current target without resuming it (leaving it
721 waiting for a debugger). */
723 extern void target_disconnect (char *, int);
725 /* Resume execution of the target process PTID. STEP says whether to
726 single-step or to run free; SIGGNAL is the signal to be given to
727 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
728 pass TARGET_SIGNAL_DEFAULT. */
730 extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
732 /* Wait for process pid to do something. PTID = -1 to wait for any
733 pid to do something. Return pid of child, or -1 in case of error;
734 store status through argument pointer STATUS. Note that it is
735 _NOT_ OK to throw_exception() out of target_wait() without popping
736 the debugging target from the stack; GDB isn't prepared to get back
737 to the prompt with a debugging target but without the frame cache,
738 stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W*
741 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
744 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
746 extern void target_fetch_registers (struct regcache *regcache, int regno);
748 /* Store at least register REGNO, or all regs if REGNO == -1.
749 It can store as many registers as it wants to, so target_prepare_to_store
750 must have been previously called. Calls error() if there are problems. */
752 extern void target_store_registers (struct regcache *regcache, int regs);
754 /* Get ready to modify the registers array. On machines which store
755 individual registers, this doesn't need to do anything. On machines
756 which store all the registers in one fell swoop, this makes sure
757 that REGISTERS contains all the registers from the program being
760 #define target_prepare_to_store(regcache) \
761 (*current_target.to_prepare_to_store) (regcache)
763 /* Determine current address space of thread PTID. */
765 struct address_space *target_thread_address_space (ptid_t);
767 /* Returns true if this target can debug multiple processes
770 #define target_supports_multi_process() \
771 (*current_target.to_supports_multi_process) ()
773 /* Invalidate all target dcaches. */
774 extern void target_dcache_invalidate (void);
776 extern int target_read_string (CORE_ADDR, char **, int, int *);
778 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
780 extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
782 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
785 /* Fetches the target's memory map. If one is found it is sorted
786 and returned, after some consistency checking. Otherwise, NULL
788 VEC(mem_region_s) *target_memory_map (void);
790 /* Erase the specified flash region. */
791 void target_flash_erase (ULONGEST address, LONGEST length);
793 /* Finish a sequence of flash operations. */
794 void target_flash_done (void);
796 /* Describes a request for a memory write operation. */
797 struct memory_write_request
799 /* Begining address that must be written. */
801 /* Past-the-end address. */
803 /* The data to write. */
805 /* A callback baton for progress reporting for this request. */
808 typedef struct memory_write_request memory_write_request_s;
809 DEF_VEC_O(memory_write_request_s);
811 /* Enumeration specifying different flash preservation behaviour. */
812 enum flash_preserve_mode
818 /* Write several memory blocks at once. This version can be more
819 efficient than making several calls to target_write_memory, in
820 particular because it can optimize accesses to flash memory.
822 Moreover, this is currently the only memory access function in gdb
823 that supports writing to flash memory, and it should be used for
824 all cases where access to flash memory is desirable.
826 REQUESTS is the vector (see vec.h) of memory_write_request.
827 PRESERVE_FLASH_P indicates what to do with blocks which must be
828 erased, but not completely rewritten.
829 PROGRESS_CB is a function that will be periodically called to provide
830 feedback to user. It will be called with the baton corresponding
831 to the request currently being written. It may also be called
832 with a NULL baton, when preserved flash sectors are being rewritten.
834 The function returns 0 on success, and error otherwise. */
835 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
836 enum flash_preserve_mode preserve_flash_p,
837 void (*progress_cb) (ULONGEST, void *));
841 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
843 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
845 extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
847 extern int inferior_has_called_syscall (ptid_t pid, int *syscall_number);
849 /* Print a line about the current target. */
851 #define target_files_info() \
852 (*current_target.to_files_info) (¤t_target)
854 /* Insert a breakpoint at address BP_TGT->placed_address in the target
855 machine. Result is 0 for success, or an errno value. */
857 #define target_insert_breakpoint(gdbarch, bp_tgt) \
858 (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt)
860 /* Remove a breakpoint at address BP_TGT->placed_address in the target
861 machine. Result is 0 for success, or an errno value. */
863 #define target_remove_breakpoint(gdbarch, bp_tgt) \
864 (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt)
866 /* Initialize the terminal settings we record for the inferior,
867 before we actually run the inferior. */
869 #define target_terminal_init() \
870 (*current_target.to_terminal_init) ()
872 /* Put the inferior's terminal settings into effect.
873 This is preparation for starting or resuming the inferior. */
875 extern void target_terminal_inferior (void);
877 /* Put some of our terminal settings into effect,
878 enough to get proper results from our output,
879 but do not change into or out of RAW mode
880 so that no input is discarded.
882 After doing this, either terminal_ours or terminal_inferior
883 should be called to get back to a normal state of affairs. */
885 #define target_terminal_ours_for_output() \
886 (*current_target.to_terminal_ours_for_output) ()
888 /* Put our terminal settings into effect.
889 First record the inferior's terminal settings
890 so they can be restored properly later. */
892 #define target_terminal_ours() \
893 (*current_target.to_terminal_ours) ()
895 /* Save our terminal settings.
896 This is called from TUI after entering or leaving the curses
897 mode. Since curses modifies our terminal this call is here
898 to take this change into account. */
900 #define target_terminal_save_ours() \
901 (*current_target.to_terminal_save_ours) ()
903 /* Print useful information about our terminal status, if such a thing
906 #define target_terminal_info(arg, from_tty) \
907 (*current_target.to_terminal_info) (arg, from_tty)
909 /* Kill the inferior process. Make it go away. */
911 extern void target_kill (void);
913 /* Load an executable file into the target process. This is expected
914 to not only bring new code into the target process, but also to
915 update GDB's symbol tables to match.
917 ARG contains command-line arguments, to be broken down with
918 buildargv (). The first non-switch argument is the filename to
919 load, FILE; the second is a number (as parsed by strtoul (..., ...,
920 0)), which is an offset to apply to the load addresses of FILE's
921 sections. The target may define switches, or other non-switch
922 arguments, as it pleases. */
924 extern void target_load (char *arg, int from_tty);
926 /* Look up a symbol in the target's symbol table. NAME is the symbol
927 name. ADDRP is a CORE_ADDR * pointing to where the value of the
928 symbol should be returned. The result is 0 if successful, nonzero
929 if the symbol does not exist in the target environment. This
930 function should not call error() if communication with the target
931 is interrupted, since it is called from symbol reading, but should
932 return nonzero, possibly doing a complain(). */
934 #define target_lookup_symbol(name, addrp) \
935 (*current_target.to_lookup_symbol) (name, addrp)
937 /* Start an inferior process and set inferior_ptid to its pid.
938 EXEC_FILE is the file to run.
939 ALLARGS is a string containing the arguments to the program.
940 ENV is the environment vector to pass. Errors reported with error().
941 On VxWorks and various standalone systems, we ignore exec_file. */
943 void target_create_inferior (char *exec_file, char *args,
944 char **env, int from_tty);
946 /* Some targets (such as ttrace-based HPUX) don't allow us to request
947 notification of inferior events such as fork and vork immediately
948 after the inferior is created. (This because of how gdb gets an
949 inferior created via invoking a shell to do it. In such a scenario,
950 if the shell init file has commands in it, the shell will fork and
951 exec for each of those commands, and we will see each such fork
954 Such targets will supply an appropriate definition for this function. */
956 #define target_post_startup_inferior(ptid) \
957 (*current_target.to_post_startup_inferior) (ptid)
959 /* On some targets, the sequence of starting up an inferior requires
960 some synchronization between gdb and the new inferior process, PID. */
962 #define target_acknowledge_created_inferior(pid) \
963 (*current_target.to_acknowledge_created_inferior) (pid)
965 /* On some targets, we can catch an inferior fork or vfork event when
966 it occurs. These functions insert/remove an already-created
967 catchpoint for such events. */
969 #define target_insert_fork_catchpoint(pid) \
970 (*current_target.to_insert_fork_catchpoint) (pid)
972 #define target_remove_fork_catchpoint(pid) \
973 (*current_target.to_remove_fork_catchpoint) (pid)
975 #define target_insert_vfork_catchpoint(pid) \
976 (*current_target.to_insert_vfork_catchpoint) (pid)
978 #define target_remove_vfork_catchpoint(pid) \
979 (*current_target.to_remove_vfork_catchpoint) (pid)
981 /* If the inferior forks or vforks, this function will be called at
982 the next resume in order to perform any bookkeeping and fiddling
983 necessary to continue debugging either the parent or child, as
984 requested, and releasing the other. Information about the fork
985 or vfork event is available via get_last_target_status ().
986 This function returns 1 if the inferior should not be resumed
987 (i.e. there is another event pending). */
989 int target_follow_fork (int follow_child);
991 /* On some targets, we can catch an inferior exec event when it
992 occurs. These functions insert/remove an already-created
993 catchpoint for such events. */
995 #define target_insert_exec_catchpoint(pid) \
996 (*current_target.to_insert_exec_catchpoint) (pid)
998 #define target_remove_exec_catchpoint(pid) \
999 (*current_target.to_remove_exec_catchpoint) (pid)
1003 NEEDED is nonzero if any syscall catch (of any kind) is requested.
1004 If NEEDED is zero, it means the target can disable the mechanism to
1005 catch system calls because there are no more catchpoints of this type.
1007 ANY_COUNT is nonzero if a generic (filter-less) syscall catch is
1008 being requested. In this case, both TABLE_SIZE and TABLE should
1011 TABLE_SIZE is the number of elements in TABLE. It only matters if
1014 TABLE is an array of ints, indexed by syscall number. An element in
1015 this array is nonzero if that syscall should be caught. This argument
1016 only matters if ANY_COUNT is zero. */
1018 #define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
1019 (*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \
1022 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
1023 exit code of PID, if any. */
1025 #define target_has_exited(pid,wait_status,exit_status) \
1026 (*current_target.to_has_exited) (pid,wait_status,exit_status)
1028 /* The debugger has completed a blocking wait() call. There is now
1029 some process event that must be processed. This function should
1030 be defined by those targets that require the debugger to perform
1031 cleanup or internal state changes in response to the process event. */
1033 /* The inferior process has died. Do what is right. */
1035 void target_mourn_inferior (void);
1037 /* Does target have enough data to do a run or attach command? */
1039 #define target_can_run(t) \
1040 ((t)->to_can_run) ()
1042 /* post process changes to signal handling in the inferior. */
1044 #define target_notice_signals(ptid) \
1045 (*current_target.to_notice_signals) (ptid)
1047 /* Check to see if a thread is still alive. */
1049 extern int target_thread_alive (ptid_t ptid);
1051 /* Query for new threads and add them to the thread list. */
1053 extern void target_find_new_threads (void);
1055 /* Make target stop in a continuable fashion. (For instance, under
1056 Unix, this should act like SIGSTOP). This function is normally
1057 used by GUIs to implement a stop button. */
1059 #define target_stop(ptid) (*current_target.to_stop) (ptid)
1061 /* Send the specified COMMAND to the target's monitor
1062 (shell,interpreter) for execution. The result of the query is
1063 placed in OUTBUF. */
1065 #define target_rcmd(command, outbuf) \
1066 (*current_target.to_rcmd) (command, outbuf)
1069 /* Does the target include all of memory, or only part of it? This
1070 determines whether we look up the target chain for other parts of
1071 memory if this target can't satisfy a request. */
1073 extern int target_has_all_memory_1 (void);
1074 #define target_has_all_memory target_has_all_memory_1 ()
1076 /* Does the target include memory? (Dummy targets don't.) */
1078 extern int target_has_memory_1 (void);
1079 #define target_has_memory target_has_memory_1 ()
1081 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1082 we start a process.) */
1084 extern int target_has_stack_1 (void);
1085 #define target_has_stack target_has_stack_1 ()
1087 /* Does the target have registers? (Exec files don't.) */
1089 extern int target_has_registers_1 (void);
1090 #define target_has_registers target_has_registers_1 ()
1092 /* Does the target have execution? Can we make it jump (through
1093 hoops), or pop its stack a few times? This means that the current
1094 target is currently executing; for some targets, that's the same as
1095 whether or not the target is capable of execution, but there are
1096 also targets which can be current while not executing. In that
1097 case this will become true after target_create_inferior or
1100 extern int target_has_execution_1 (void);
1101 #define target_has_execution target_has_execution_1 ()
1103 /* Default implementations for process_stratum targets. Return true
1104 if there's a selected inferior, false otherwise. */
1106 extern int default_child_has_all_memory (struct target_ops *ops);
1107 extern int default_child_has_memory (struct target_ops *ops);
1108 extern int default_child_has_stack (struct target_ops *ops);
1109 extern int default_child_has_registers (struct target_ops *ops);
1110 extern int default_child_has_execution (struct target_ops *ops);
1112 /* Can the target support the debugger control of thread execution?
1113 Can it lock the thread scheduler? */
1115 #define target_can_lock_scheduler \
1116 (current_target.to_has_thread_control & tc_schedlock)
1118 /* Should the target enable async mode if it is supported? Temporary
1119 cludge until async mode is a strict superset of sync mode. */
1120 extern int target_async_permitted;
1122 /* Can the target support asynchronous execution? */
1123 #define target_can_async_p() (current_target.to_can_async_p ())
1125 /* Is the target in asynchronous execution mode? */
1126 #define target_is_async_p() (current_target.to_is_async_p ())
1128 int target_supports_non_stop (void);
1130 /* Put the target in async mode with the specified callback function. */
1131 #define target_async(CALLBACK,CONTEXT) \
1132 (current_target.to_async ((CALLBACK), (CONTEXT)))
1134 /* This is to be used ONLY within call_function_by_hand(). It provides
1135 a workaround, to have inferior function calls done in sychronous
1136 mode, even though the target is asynchronous. After
1137 target_async_mask(0) is called, calls to target_can_async_p() will
1138 return FALSE , so that target_resume() will not try to start the
1139 target asynchronously. After the inferior stops, we IMMEDIATELY
1140 restore the previous nature of the target, by calling
1141 target_async_mask(1). After that, target_can_async_p() will return
1142 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1144 FIXME ezannoni 1999-12-13: we won't need this once we move
1145 the turning async on and off to the single execution commands,
1146 from where it is done currently, in remote_resume(). */
1148 #define target_async_mask(MASK) \
1149 (current_target.to_async_mask (MASK))
1151 /* Converts a process id to a string. Usually, the string just contains
1152 `process xyz', but on some systems it may contain
1153 `process xyz thread abc'. */
1155 extern char *target_pid_to_str (ptid_t ptid);
1157 extern char *normal_pid_to_str (ptid_t ptid);
1159 /* Return a short string describing extra information about PID,
1160 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1163 #define target_extra_thread_info(TP) \
1164 (current_target.to_extra_thread_info (TP))
1166 /* Attempts to find the pathname of the executable file
1167 that was run to create a specified process.
1169 The process PID must be stopped when this operation is used.
1171 If the executable file cannot be determined, NULL is returned.
1173 Else, a pointer to a character string containing the pathname
1174 is returned. This string should be copied into a buffer by
1175 the client if the string will not be immediately used, or if
1178 #define target_pid_to_exec_file(pid) \
1179 (current_target.to_pid_to_exec_file) (pid)
1181 /* See the to_thread_architecture description in struct target_ops. */
1183 #define target_thread_architecture(ptid) \
1184 (current_target.to_thread_architecture (¤t_target, ptid))
1187 * Iterator function for target memory regions.
1188 * Calls a callback function once for each memory region 'mapped'
1189 * in the child process. Defined as a simple macro rather than
1190 * as a function macro so that it can be tested for nullity.
1193 #define target_find_memory_regions(FUNC, DATA) \
1194 (current_target.to_find_memory_regions) (FUNC, DATA)
1197 * Compose corefile .note section.
1200 #define target_make_corefile_notes(BFD, SIZE_P) \
1201 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1203 /* Bookmark interfaces. */
1204 #define target_get_bookmark(ARGS, FROM_TTY) \
1205 (current_target.to_get_bookmark) (ARGS, FROM_TTY)
1207 #define target_goto_bookmark(ARG, FROM_TTY) \
1208 (current_target.to_goto_bookmark) (ARG, FROM_TTY)
1210 /* Hardware watchpoint interfaces. */
1212 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1213 write). Only the INFERIOR_PTID task is being queried. */
1215 #define target_stopped_by_watchpoint \
1216 (*current_target.to_stopped_by_watchpoint)
1218 /* Non-zero if we have steppable watchpoints */
1220 #define target_have_steppable_watchpoint \
1221 (current_target.to_have_steppable_watchpoint)
1223 /* Non-zero if we have continuable watchpoints */
1225 #define target_have_continuable_watchpoint \
1226 (current_target.to_have_continuable_watchpoint)
1228 /* Provide defaults for hardware watchpoint functions. */
1230 /* If the *_hw_beakpoint functions have not been defined
1231 elsewhere use the definitions in the target vector. */
1233 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1234 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1235 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1236 (including this one?). OTHERTYPE is who knows what... */
1238 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
1239 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1241 #define target_region_ok_for_hw_watchpoint(addr, len) \
1242 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1245 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1246 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1247 success, non-zero for failure. */
1249 #define target_insert_watchpoint(addr, len, type) \
1250 (*current_target.to_insert_watchpoint) (addr, len, type)
1252 #define target_remove_watchpoint(addr, len, type) \
1253 (*current_target.to_remove_watchpoint) (addr, len, type)
1255 #define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
1256 (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt)
1258 #define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
1259 (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt)
1261 /* Return non-zero if target knows the data address which triggered this
1262 target_stopped_by_watchpoint, in such case place it to *ADDR_P. Only the
1263 INFERIOR_PTID task is being queried. */
1264 #define target_stopped_data_address(target, addr_p) \
1265 (*target.to_stopped_data_address) (target, addr_p)
1267 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1268 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1270 /* Target can execute in reverse? */
1271 #define target_can_execute_reverse \
1272 (current_target.to_can_execute_reverse ? \
1273 current_target.to_can_execute_reverse () : 0)
1275 extern const struct target_desc *target_read_description (struct target_ops *);
1277 #define target_get_ada_task_ptid(lwp, tid) \
1278 (*current_target.to_get_ada_task_ptid) (lwp,tid)
1280 /* Utility implementation of searching memory. */
1281 extern int simple_search_memory (struct target_ops* ops,
1282 CORE_ADDR start_addr,
1283 ULONGEST search_space_len,
1284 const gdb_byte *pattern,
1285 ULONGEST pattern_len,
1286 CORE_ADDR *found_addrp);
1288 /* Main entry point for searching memory. */
1289 extern int target_search_memory (CORE_ADDR start_addr,
1290 ULONGEST search_space_len,
1291 const gdb_byte *pattern,
1292 ULONGEST pattern_len,
1293 CORE_ADDR *found_addrp);
1295 /* Tracepoint-related operations. */
1297 #define target_trace_init() \
1298 (*current_target.to_trace_init) ()
1300 #define target_download_tracepoint(t) \
1301 (*current_target.to_download_tracepoint) (t)
1303 #define target_download_trace_state_variable(tsv) \
1304 (*current_target.to_download_trace_state_variable) (tsv)
1306 #define target_trace_start() \
1307 (*current_target.to_trace_start) ()
1309 #define target_trace_set_readonly_regions() \
1310 (*current_target.to_trace_set_readonly_regions) ()
1312 #define target_get_trace_status(stop_reason) \
1313 (*current_target.to_get_trace_status) (stop_reason)
1315 #define target_trace_stop() \
1316 (*current_target.to_trace_stop) ()
1318 #define target_trace_find(type,num,addr1,addr2,tpp) \
1319 (*current_target.to_trace_find) ((type), (num), (addr1), (addr2), (tpp))
1321 #define target_get_trace_state_variable_value(tsv,val) \
1322 (*current_target.to_get_trace_state_variable_value) ((tsv), (val))
1324 #define target_set_disconnected_tracing(val) \
1325 (*current_target.to_set_disconnected_tracing) (val)
1327 /* Command logging facility. */
1329 #define target_log_command(p) \
1331 if (current_target.to_log_command) \
1332 (*current_target.to_log_command) (p); \
1335 /* Routines for maintenance of the target structures...
1337 add_target: Add a target to the list of all possible targets.
1339 push_target: Make this target the top of the stack of currently used
1340 targets, within its particular stratum of the stack. Result
1341 is 0 if now atop the stack, nonzero if not on top (maybe
1344 unpush_target: Remove this from the stack of currently used targets,
1345 no matter where it is on the list. Returns 0 if no
1346 change, 1 if removed from stack.
1348 pop_target: Remove the top thing on the stack of current targets. */
1350 extern void add_target (struct target_ops *);
1352 extern int push_target (struct target_ops *);
1354 extern int unpush_target (struct target_ops *);
1356 extern void target_pre_inferior (int);
1358 extern void target_preopen (int);
1360 extern void pop_target (void);
1362 /* Does whatever cleanup is required to get rid of all pushed targets.
1363 QUITTING is propagated to target_close; it indicates that GDB is
1364 exiting and should not get hung on an error (otherwise it is
1365 important to perform clean termination, even if it takes a
1367 extern void pop_all_targets (int quitting);
1369 /* Like pop_all_targets, but pops only targets whose stratum is
1370 strictly above ABOVE_STRATUM. */
1371 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1373 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1376 /* Struct target_section maps address ranges to file sections. It is
1377 mostly used with BFD files, but can be used without (e.g. for handling
1378 raw disks, or files not in formats handled by BFD). */
1380 struct target_section
1382 CORE_ADDR addr; /* Lowest address in section */
1383 CORE_ADDR endaddr; /* 1+highest address in section */
1385 struct bfd_section *the_bfd_section;
1387 bfd *bfd; /* BFD file pointer */
1390 /* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
1392 struct target_section_table
1394 struct target_section *sections;
1395 struct target_section *sections_end;
1398 /* Return the "section" containing the specified address. */
1399 struct target_section *target_section_by_addr (struct target_ops *target,
1402 /* Return the target section table this target (or the targets
1403 beneath) currently manipulate. */
1405 extern struct target_section_table *target_get_section_table
1406 (struct target_ops *target);
1408 /* From mem-break.c */
1410 extern int memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
1412 extern int memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
1414 extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
1416 extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
1421 extern void initialize_targets (void);
1423 extern NORETURN void noprocess (void) ATTR_NORETURN;
1425 extern void target_require_runnable (void);
1427 extern void find_default_attach (struct target_ops *, char *, int);
1429 extern void find_default_create_inferior (struct target_ops *,
1430 char *, char *, char **, int);
1432 extern struct target_ops *find_run_target (void);
1434 extern struct target_ops *find_core_target (void);
1436 extern struct target_ops *find_target_beneath (struct target_ops *);
1438 /* Read OS data object of type TYPE from the target, and return it in
1439 XML format. The result is NUL-terminated and returned as a string,
1440 allocated using xmalloc. If an error occurs or the transfer is
1441 unsupported, NULL is returned. Empty objects are returned as
1442 allocated but empty strings. */
1444 extern char *target_get_osdata (const char *type);
1447 /* Stuff that should be shared among the various remote targets. */
1449 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1450 information (higher values, more information). */
1451 extern int remote_debug;
1453 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1454 extern int baud_rate;
1455 /* Timeout limit for response from target. */
1456 extern int remote_timeout;
1459 /* Functions for helping to write a native target. */
1461 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1462 extern void store_waitstatus (struct target_waitstatus *, int);
1464 /* These are in common/signals.c, but they're only used by gdb. */
1465 extern enum target_signal default_target_signal_from_host (struct gdbarch *,
1467 extern int default_target_signal_to_host (struct gdbarch *,
1468 enum target_signal);
1470 /* Convert from a number used in a GDB command to an enum target_signal. */
1471 extern enum target_signal target_signal_from_command (int);
1472 /* End of files in common/signals.c. */
1474 /* Set the show memory breakpoints mode to show, and installs a cleanup
1475 to restore it back to the current value. */
1476 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1479 /* Imported from machine dependent code */
1481 /* Blank target vector entries are initialized to target_ignore. */
1482 void target_ignore (void);
1484 extern struct target_ops deprecated_child_ops;
1486 #endif /* !defined (TARGET_H) */