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
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;
34 /* This include file defines the interface between the main part
35 of the debugger, and the part which is target-specific, or
36 specific to the communications interface between us and the
39 A TARGET is an interface between the debugger and a particular
40 kind of file or process. Targets can be STACKED in STRATA,
41 so that more than one target can potentially respond to a request.
42 In particular, memory accesses will walk down the stack of targets
43 until they find a target that is interested in handling that particular
44 address. STRATA are artificial boundaries on the stack, within
45 which particular kinds of targets live. Strata exist so that
46 people don't get confused by pushing e.g. a process target and then
47 a file target, and wondering why they can't see the current values
48 of variables any more (the file target is handling them and they
49 never get to the process target). So when you push a file target,
50 it goes into the file stratum, which is always below the process
61 dummy_stratum, /* The lowest of the low */
62 file_stratum, /* Executable files, etc */
63 core_stratum, /* Core dump files */
64 process_stratum, /* Executing processes */
65 thread_stratum /* Executing threads */
68 enum thread_control_capabilities
70 tc_none = 0, /* Default: can't control thread execution. */
71 tc_schedlock = 1, /* Can lock the thread scheduler. */
74 /* Stuff for target_wait. */
76 /* Generally, what has the program done? */
79 /* The program has exited. The exit status is in value.integer. */
80 TARGET_WAITKIND_EXITED,
82 /* The program has stopped with a signal. Which signal is in
84 TARGET_WAITKIND_STOPPED,
86 /* The program has terminated with a signal. Which signal is in
88 TARGET_WAITKIND_SIGNALLED,
90 /* The program is letting us know that it dynamically loaded something
91 (e.g. it called load(2) on AIX). */
92 TARGET_WAITKIND_LOADED,
94 /* The program has forked. A "related" process' PTID is in
95 value.related_pid. I.e., if the child forks, value.related_pid
96 is the parent's ID. */
98 TARGET_WAITKIND_FORKED,
100 /* The program has vforked. A "related" process's PTID is in
101 value.related_pid. */
103 TARGET_WAITKIND_VFORKED,
105 /* The program has exec'ed a new executable file. The new file's
106 pathname is pointed to by value.execd_pathname. */
108 TARGET_WAITKIND_EXECD,
110 /* The program has entered or returned from a system call. On
111 HP-UX, this is used in the hardware watchpoint implementation.
112 The syscall's unique integer ID number is in value.syscall_id */
114 TARGET_WAITKIND_SYSCALL_ENTRY,
115 TARGET_WAITKIND_SYSCALL_RETURN,
117 /* Nothing happened, but we stopped anyway. This perhaps should be handled
118 within target_wait, but I'm not sure target_wait should be resuming the
120 TARGET_WAITKIND_SPURIOUS,
122 /* An event has occured, but we should wait again.
123 Remote_async_wait() returns this when there is an event
124 on the inferior, but the rest of the world is not interested in
125 it. The inferior has not stopped, but has just sent some output
126 to the console, for instance. In this case, we want to go back
127 to the event loop and wait there for another event from the
128 inferior, rather than being stuck in the remote_async_wait()
129 function. This way the event loop is responsive to other events,
130 like for instance the user typing. */
131 TARGET_WAITKIND_IGNORE,
133 /* The target has run out of history information,
134 and cannot run backward any further. */
135 TARGET_WAITKIND_NO_HISTORY
138 struct target_waitstatus
140 enum target_waitkind kind;
142 /* Forked child pid, execd pathname, exit status or signal number. */
146 enum target_signal sig;
148 char *execd_pathname;
154 /* Return a pretty printed form of target_waitstatus.
155 Space for the result is malloc'd, caller must free. */
156 extern char *target_waitstatus_to_string (const struct target_waitstatus *);
158 /* Possible types of events that the inferior handler will have to
160 enum inferior_event_type
162 /* There is a request to quit the inferior, abandon it. */
164 /* Process a normal inferior event which will result in target_wait
167 /* Deal with an error on the inferior. */
169 /* We are called because a timer went off. */
171 /* We are called to do stuff after the inferior stops. */
173 /* We are called to do some stuff after the inferior stops, but we
174 are expected to reenter the proceed() and
175 handle_inferior_event() functions. This is used only in case of
176 'step n' like commands. */
180 /* Return the string for a signal. */
181 extern const char *target_signal_to_string (enum target_signal);
183 /* Return the name (SIGHUP, etc.) for a signal. */
184 extern const char *target_signal_to_name (enum target_signal);
186 /* Given a name (SIGHUP, etc.), return its signal. */
187 enum target_signal target_signal_from_name (const char *);
189 /* Target objects which can be transfered using target_read,
190 target_write, et cetera. */
194 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
196 /* SPU target specific transfer. See "spu-tdep.c". */
198 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
199 TARGET_OBJECT_MEMORY,
200 /* Memory, avoiding GDB's data cache and trusting the executable.
201 Target implementations of to_xfer_partial never need to handle
202 this object, and most callers should not use it. */
203 TARGET_OBJECT_RAW_MEMORY,
204 /* Kernel Unwind Table. See "ia64-tdep.c". */
205 TARGET_OBJECT_UNWIND_TABLE,
206 /* Transfer auxilliary vector. */
208 /* StackGhost cookie. See "sparc-tdep.c". */
209 TARGET_OBJECT_WCOOKIE,
210 /* Target memory map in XML format. */
211 TARGET_OBJECT_MEMORY_MAP,
212 /* Flash memory. This object can be used to write contents to
213 a previously erased flash memory. Using it without erasing
214 flash can have unexpected results. Addresses are physical
215 address on target, and not relative to flash start. */
217 /* Available target-specific features, e.g. registers and coprocessors.
218 See "target-descriptions.c". ANNEX should never be empty. */
219 TARGET_OBJECT_AVAILABLE_FEATURES,
220 /* Currently loaded libraries, in XML format. */
221 TARGET_OBJECT_LIBRARIES,
222 /* Get OS specific data. The ANNEX specifies the type (running
224 TARGET_OBJECT_OSDATA,
225 /* Extra signal info. Usually the contents of `siginfo_t' on unix
227 TARGET_OBJECT_SIGNAL_INFO,
228 /* Possible future objects: TARGET_OBJECT_FILE, ... */
231 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
232 OBJECT. The OFFSET, for a seekable object, specifies the
233 starting point. The ANNEX can be used to provide additional
234 data-specific information to the target.
236 Return the number of bytes actually transfered, or -1 if the
237 transfer is not supported or otherwise fails. Return of a positive
238 value less than LEN indicates that no further transfer is possible.
239 Unlike the raw to_xfer_partial interface, callers of these
240 functions do not need to retry partial transfers. */
242 extern LONGEST target_read (struct target_ops *ops,
243 enum target_object object,
244 const char *annex, gdb_byte *buf,
245 ULONGEST offset, LONGEST len);
247 extern LONGEST target_read_until_error (struct target_ops *ops,
248 enum target_object object,
249 const char *annex, gdb_byte *buf,
250 ULONGEST offset, LONGEST len);
252 extern LONGEST target_write (struct target_ops *ops,
253 enum target_object object,
254 const char *annex, const gdb_byte *buf,
255 ULONGEST offset, LONGEST len);
257 /* Similar to target_write, except that it also calls PROGRESS with
258 the number of bytes written and the opaque BATON after every
259 successful partial write (and before the first write). This is
260 useful for progress reporting and user interaction while writing
261 data. To abort the transfer, the progress callback can throw an
264 LONGEST target_write_with_progress (struct target_ops *ops,
265 enum target_object object,
266 const char *annex, const gdb_byte *buf,
267 ULONGEST offset, LONGEST len,
268 void (*progress) (ULONGEST, void *),
271 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
272 be read using OPS. The return value will be -1 if the transfer
273 fails or is not supported; 0 if the object is empty; or the length
274 of the object otherwise. If a positive value is returned, a
275 sufficiently large buffer will be allocated using xmalloc and
276 returned in *BUF_P containing the contents of the object.
278 This method should be used for objects sufficiently small to store
279 in a single xmalloc'd buffer, when no fixed bound on the object's
280 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
281 through this function. */
283 extern LONGEST target_read_alloc (struct target_ops *ops,
284 enum target_object object,
285 const char *annex, gdb_byte **buf_p);
287 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
288 returned as a string, allocated using xmalloc. If an error occurs
289 or the transfer is unsupported, NULL is returned. Empty objects
290 are returned as allocated but empty strings. A warning is issued
291 if the result contains any embedded NUL bytes. */
293 extern char *target_read_stralloc (struct target_ops *ops,
294 enum target_object object,
297 /* Wrappers to target read/write that perform memory transfers. They
298 throw an error if the memory transfer fails.
300 NOTE: cagney/2003-10-23: The naming schema is lifted from
301 "frame.h". The parameter order is lifted from get_frame_memory,
302 which in turn lifted it from read_memory. */
304 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
305 gdb_byte *buf, LONGEST len);
306 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
307 CORE_ADDR addr, int len);
309 struct thread_info; /* fwd decl for parameter list below: */
313 struct target_ops *beneath; /* To the target under this one. */
314 char *to_shortname; /* Name this target type */
315 char *to_longname; /* Name for printing */
316 char *to_doc; /* Documentation. Does not include trailing
317 newline, and starts with a one-line descrip-
318 tion (probably similar to to_longname). */
319 /* Per-target scratch pad. */
321 /* The open routine takes the rest of the parameters from the
322 command, and (if successful) pushes a new target onto the
323 stack. Targets should supply this routine, if only to provide
325 void (*to_open) (char *, int);
326 /* Old targets with a static target vector provide "to_close".
327 New re-entrant targets provide "to_xclose" and that is expected
328 to xfree everything (including the "struct target_ops"). */
329 void (*to_xclose) (struct target_ops *targ, int quitting);
330 void (*to_close) (int);
331 void (*to_attach) (struct target_ops *ops, char *, int);
332 void (*to_post_attach) (int);
333 void (*to_detach) (struct target_ops *ops, char *, int);
334 void (*to_disconnect) (struct target_ops *, char *, int);
335 void (*to_resume) (ptid_t, int, enum target_signal);
336 ptid_t (*to_wait) (struct target_ops *,
337 ptid_t, struct target_waitstatus *);
338 void (*to_fetch_registers) (struct regcache *, int);
339 void (*to_store_registers) (struct regcache *, int);
340 void (*to_prepare_to_store) (struct regcache *);
342 /* Transfer LEN bytes of memory between GDB address MYADDR and
343 target address MEMADDR. If WRITE, transfer them to the target, else
344 transfer them from the target. TARGET is the target from which we
347 Return value, N, is one of the following:
349 0 means that we can't handle this. If errno has been set, it is the
350 error which prevented us from doing it (FIXME: What about bfd_error?).
352 positive (call it N) means that we have transferred N bytes
353 starting at MEMADDR. We might be able to handle more bytes
354 beyond this length, but no promises.
356 negative (call its absolute value N) means that we cannot
357 transfer right at MEMADDR, but we could transfer at least
358 something at MEMADDR + N.
360 NOTE: cagney/2004-10-01: This has been entirely superseeded by
361 to_xfer_partial and inferior inheritance. */
363 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
365 struct mem_attrib *attrib,
366 struct target_ops *target);
368 void (*to_files_info) (struct target_ops *);
369 int (*to_insert_breakpoint) (struct bp_target_info *);
370 int (*to_remove_breakpoint) (struct bp_target_info *);
371 int (*to_can_use_hw_breakpoint) (int, int, int);
372 int (*to_insert_hw_breakpoint) (struct bp_target_info *);
373 int (*to_remove_hw_breakpoint) (struct bp_target_info *);
374 int (*to_remove_watchpoint) (CORE_ADDR, int, int);
375 int (*to_insert_watchpoint) (CORE_ADDR, int, int);
376 int (*to_stopped_by_watchpoint) (void);
377 int to_have_steppable_watchpoint;
378 int to_have_continuable_watchpoint;
379 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
380 int (*to_watchpoint_addr_within_range) (struct target_ops *,
381 CORE_ADDR, CORE_ADDR, int);
382 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
383 void (*to_terminal_init) (void);
384 void (*to_terminal_inferior) (void);
385 void (*to_terminal_ours_for_output) (void);
386 void (*to_terminal_ours) (void);
387 void (*to_terminal_save_ours) (void);
388 void (*to_terminal_info) (char *, int);
389 void (*to_kill) (void);
390 void (*to_load) (char *, int);
391 int (*to_lookup_symbol) (char *, CORE_ADDR *);
392 void (*to_create_inferior) (struct target_ops *,
393 char *, char *, char **, int);
394 void (*to_post_startup_inferior) (ptid_t);
395 void (*to_acknowledge_created_inferior) (int);
396 void (*to_insert_fork_catchpoint) (int);
397 int (*to_remove_fork_catchpoint) (int);
398 void (*to_insert_vfork_catchpoint) (int);
399 int (*to_remove_vfork_catchpoint) (int);
400 int (*to_follow_fork) (struct target_ops *, int);
401 void (*to_insert_exec_catchpoint) (int);
402 int (*to_remove_exec_catchpoint) (int);
403 int (*to_has_exited) (int, int, int *);
404 void (*to_mourn_inferior) (struct target_ops *);
405 int (*to_can_run) (void);
406 void (*to_notice_signals) (ptid_t ptid);
407 int (*to_thread_alive) (ptid_t ptid);
408 void (*to_find_new_threads) (void);
409 char *(*to_pid_to_str) (struct target_ops *, ptid_t);
410 char *(*to_extra_thread_info) (struct thread_info *);
411 void (*to_stop) (ptid_t);
412 void (*to_rcmd) (char *command, struct ui_file *output);
413 char *(*to_pid_to_exec_file) (int pid);
414 void (*to_log_command) (const char *);
415 enum strata to_stratum;
416 int to_has_all_memory;
419 int to_has_registers;
420 int to_has_execution;
421 int to_has_thread_control; /* control thread execution */
422 int to_attach_no_wait;
427 /* ASYNC target controls */
428 int (*to_can_async_p) (void);
429 int (*to_is_async_p) (void);
430 void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
431 int (*to_async_mask) (int);
432 int (*to_supports_non_stop) (void);
433 int (*to_find_memory_regions) (int (*) (CORE_ADDR,
438 char * (*to_make_corefile_notes) (bfd *, int *);
440 /* Return the thread-local address at OFFSET in the
441 thread-local storage for the thread PTID and the shared library
442 or executable file given by OBJFILE. If that block of
443 thread-local storage hasn't been allocated yet, this function
444 may return an error. */
445 CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
447 CORE_ADDR load_module_addr,
450 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
451 OBJECT. The OFFSET, for a seekable object, specifies the
452 starting point. The ANNEX can be used to provide additional
453 data-specific information to the target.
455 Return the number of bytes actually transfered, zero when no
456 further transfer is possible, and -1 when the transfer is not
457 supported. Return of a positive value smaller than LEN does
458 not indicate the end of the object, only the end of the
459 transfer; higher level code should continue transferring if
460 desired. This is handled in target.c.
462 The interface does not support a "retry" mechanism. Instead it
463 assumes that at least one byte will be transfered on each
466 NOTE: cagney/2003-10-17: The current interface can lead to
467 fragmented transfers. Lower target levels should not implement
468 hacks, such as enlarging the transfer, in an attempt to
469 compensate for this. Instead, the target stack should be
470 extended so that it implements supply/collect methods and a
471 look-aside object cache. With that available, the lowest
472 target can safely and freely "push" data up the stack.
474 See target_read and target_write for more information. One,
475 and only one, of readbuf or writebuf must be non-NULL. */
477 LONGEST (*to_xfer_partial) (struct target_ops *ops,
478 enum target_object object, const char *annex,
479 gdb_byte *readbuf, const gdb_byte *writebuf,
480 ULONGEST offset, LONGEST len);
482 /* Returns the memory map for the target. A return value of NULL
483 means that no memory map is available. If a memory address
484 does not fall within any returned regions, it's assumed to be
485 RAM. The returned memory regions should not overlap.
487 The order of regions does not matter; target_memory_map will
488 sort regions by starting address. For that reason, this
489 function should not be called directly except via
492 This method should not cache data; if the memory map could
493 change unexpectedly, it should be invalidated, and higher
494 layers will re-fetch it. */
495 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
497 /* Erases the region of flash memory starting at ADDRESS, of
500 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
501 on flash block boundaries, as reported by 'to_memory_map'. */
502 void (*to_flash_erase) (struct target_ops *,
503 ULONGEST address, LONGEST length);
505 /* Finishes a flash memory write sequence. After this operation
506 all flash memory should be available for writing and the result
507 of reading from areas written by 'to_flash_write' should be
508 equal to what was written. */
509 void (*to_flash_done) (struct target_ops *);
511 /* Describe the architecture-specific features of this target.
512 Returns the description found, or NULL if no description
514 const struct target_desc *(*to_read_description) (struct target_ops *ops);
516 /* Build the PTID of the thread on which a given task is running,
517 based on LWP and THREAD. These values are extracted from the
518 task Private_Data section of the Ada Task Control Block, and
519 their interpretation depends on the target. */
520 ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
522 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
523 Return 0 if *READPTR is already at the end of the buffer.
524 Return -1 if there is insufficient buffer for a whole entry.
525 Return 1 if an entry was read into *TYPEP and *VALP. */
526 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
527 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
529 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
530 sequence of bytes in PATTERN with length PATTERN_LEN.
532 The result is 1 if found, 0 if not found, and -1 if there was an error
533 requiring halting of the search (e.g. memory read error).
534 If the pattern is found the address is recorded in FOUND_ADDRP. */
535 int (*to_search_memory) (struct target_ops *ops,
536 CORE_ADDR start_addr, ULONGEST search_space_len,
537 const gdb_byte *pattern, ULONGEST pattern_len,
538 CORE_ADDR *found_addrp);
540 /* Can target execute in reverse? */
541 int (*to_can_execute_reverse) ();
543 /* Does this target support debugging multiple processes
545 int (*to_supports_multi_process) (void);
548 /* Need sub-structure for target machine related rather than comm related?
552 /* Magic number for checking ops size. If a struct doesn't end with this
553 number, somebody changed the declaration but didn't change all the
554 places that initialize one. */
556 #define OPS_MAGIC 3840
558 /* The ops structure for our "current" target process. This should
559 never be NULL. If there is no target, it points to the dummy_target. */
561 extern struct target_ops current_target;
563 /* Define easy words for doing these operations on our current target. */
565 #define target_shortname (current_target.to_shortname)
566 #define target_longname (current_target.to_longname)
568 /* Does whatever cleanup is required for a target that we are no
569 longer going to be calling. QUITTING indicates that GDB is exiting
570 and should not get hung on an error (otherwise it is important to
571 perform clean termination, even if it takes a while). This routine
572 is automatically always called when popping the target off the
573 target stack (to_beneath is undefined). Closing file descriptors
574 and freeing all memory allocated memory are typical things it
577 void target_close (struct target_ops *targ, int quitting);
579 /* Attaches to a process on the target side. Arguments are as passed
580 to the `attach' command by the user. This routine can be called
581 when the target is not on the target-stack, if the target_can_run
582 routine returns 1; in that case, it must push itself onto the stack.
583 Upon exit, the target should be ready for normal operations, and
584 should be ready to deliver the status of the process immediately
585 (without waiting) to an upcoming target_wait call. */
587 void target_attach (char *, int);
589 /* Some targets don't generate traps when attaching to the inferior,
590 or their target_attach implementation takes care of the waiting.
591 These targets must set to_attach_no_wait. */
593 #define target_attach_no_wait \
594 (current_target.to_attach_no_wait)
596 /* The target_attach operation places a process under debugger control,
597 and stops the process.
599 This operation provides a target-specific hook that allows the
600 necessary bookkeeping to be performed after an attach completes. */
601 #define target_post_attach(pid) \
602 (*current_target.to_post_attach) (pid)
604 /* Takes a program previously attached to and detaches it.
605 The program may resume execution (some targets do, some don't) and will
606 no longer stop on signals, etc. We better not have left any breakpoints
607 in the program or it'll die when it hits one. ARGS is arguments
608 typed by the user (e.g. a signal to send the process). FROM_TTY
609 says whether to be verbose or not. */
611 extern void target_detach (char *, int);
613 /* Disconnect from the current target without resuming it (leaving it
614 waiting for a debugger). */
616 extern void target_disconnect (char *, int);
618 /* Resume execution of the target process PTID. STEP says whether to
619 single-step or to run free; SIGGNAL is the signal to be given to
620 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
621 pass TARGET_SIGNAL_DEFAULT. */
623 extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
625 /* Wait for process pid to do something. PTID = -1 to wait for any
626 pid to do something. Return pid of child, or -1 in case of error;
627 store status through argument pointer STATUS. Note that it is
628 _NOT_ OK to throw_exception() out of target_wait() without popping
629 the debugging target from the stack; GDB isn't prepared to get back
630 to the prompt with a debugging target but without the frame cache,
631 stop_pc, etc., set up. */
633 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status);
635 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
637 #define target_fetch_registers(regcache, regno) \
638 (*current_target.to_fetch_registers) (regcache, regno)
640 /* Store at least register REGNO, or all regs if REGNO == -1.
641 It can store as many registers as it wants to, so target_prepare_to_store
642 must have been previously called. Calls error() if there are problems. */
644 #define target_store_registers(regcache, regs) \
645 (*current_target.to_store_registers) (regcache, regs)
647 /* Get ready to modify the registers array. On machines which store
648 individual registers, this doesn't need to do anything. On machines
649 which store all the registers in one fell swoop, this makes sure
650 that REGISTERS contains all the registers from the program being
653 #define target_prepare_to_store(regcache) \
654 (*current_target.to_prepare_to_store) (regcache)
656 /* Returns true if this target can debug multiple processes
659 #define target_supports_multi_process() \
660 (*current_target.to_supports_multi_process) ()
662 extern DCACHE *target_dcache;
664 extern int target_read_string (CORE_ADDR, char **, int, int *);
666 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
668 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
671 extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int,
672 struct mem_attrib *, struct target_ops *);
674 /* Fetches the target's memory map. If one is found it is sorted
675 and returned, after some consistency checking. Otherwise, NULL
677 VEC(mem_region_s) *target_memory_map (void);
679 /* Erase the specified flash region. */
680 void target_flash_erase (ULONGEST address, LONGEST length);
682 /* Finish a sequence of flash operations. */
683 void target_flash_done (void);
685 /* Describes a request for a memory write operation. */
686 struct memory_write_request
688 /* Begining address that must be written. */
690 /* Past-the-end address. */
692 /* The data to write. */
694 /* A callback baton for progress reporting for this request. */
697 typedef struct memory_write_request memory_write_request_s;
698 DEF_VEC_O(memory_write_request_s);
700 /* Enumeration specifying different flash preservation behaviour. */
701 enum flash_preserve_mode
707 /* Write several memory blocks at once. This version can be more
708 efficient than making several calls to target_write_memory, in
709 particular because it can optimize accesses to flash memory.
711 Moreover, this is currently the only memory access function in gdb
712 that supports writing to flash memory, and it should be used for
713 all cases where access to flash memory is desirable.
715 REQUESTS is the vector (see vec.h) of memory_write_request.
716 PRESERVE_FLASH_P indicates what to do with blocks which must be
717 erased, but not completely rewritten.
718 PROGRESS_CB is a function that will be periodically called to provide
719 feedback to user. It will be called with the baton corresponding
720 to the request currently being written. It may also be called
721 with a NULL baton, when preserved flash sectors are being rewritten.
723 The function returns 0 on success, and error otherwise. */
724 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
725 enum flash_preserve_mode preserve_flash_p,
726 void (*progress_cb) (ULONGEST, void *));
730 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
732 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
734 extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
738 extern void print_section_info (struct target_ops *, bfd *);
740 /* Print a line about the current target. */
742 #define target_files_info() \
743 (*current_target.to_files_info) (¤t_target)
745 /* Insert a breakpoint at address BP_TGT->placed_address in the target
746 machine. Result is 0 for success, or an errno value. */
748 #define target_insert_breakpoint(bp_tgt) \
749 (*current_target.to_insert_breakpoint) (bp_tgt)
751 /* Remove a breakpoint at address BP_TGT->placed_address in the target
752 machine. Result is 0 for success, or an errno value. */
754 #define target_remove_breakpoint(bp_tgt) \
755 (*current_target.to_remove_breakpoint) (bp_tgt)
757 /* Initialize the terminal settings we record for the inferior,
758 before we actually run the inferior. */
760 #define target_terminal_init() \
761 (*current_target.to_terminal_init) ()
763 /* Put the inferior's terminal settings into effect.
764 This is preparation for starting or resuming the inferior. */
766 #define target_terminal_inferior() \
767 (*current_target.to_terminal_inferior) ()
769 /* Put some of our terminal settings into effect,
770 enough to get proper results from our output,
771 but do not change into or out of RAW mode
772 so that no input is discarded.
774 After doing this, either terminal_ours or terminal_inferior
775 should be called to get back to a normal state of affairs. */
777 #define target_terminal_ours_for_output() \
778 (*current_target.to_terminal_ours_for_output) ()
780 /* Put our terminal settings into effect.
781 First record the inferior's terminal settings
782 so they can be restored properly later. */
784 #define target_terminal_ours() \
785 (*current_target.to_terminal_ours) ()
787 /* Save our terminal settings.
788 This is called from TUI after entering or leaving the curses
789 mode. Since curses modifies our terminal this call is here
790 to take this change into account. */
792 #define target_terminal_save_ours() \
793 (*current_target.to_terminal_save_ours) ()
795 /* Print useful information about our terminal status, if such a thing
798 #define target_terminal_info(arg, from_tty) \
799 (*current_target.to_terminal_info) (arg, from_tty)
801 /* Kill the inferior process. Make it go away. */
803 #define target_kill() \
804 (*current_target.to_kill) ()
806 /* Load an executable file into the target process. This is expected
807 to not only bring new code into the target process, but also to
808 update GDB's symbol tables to match.
810 ARG contains command-line arguments, to be broken down with
811 buildargv (). The first non-switch argument is the filename to
812 load, FILE; the second is a number (as parsed by strtoul (..., ...,
813 0)), which is an offset to apply to the load addresses of FILE's
814 sections. The target may define switches, or other non-switch
815 arguments, as it pleases. */
817 extern void target_load (char *arg, int from_tty);
819 /* Look up a symbol in the target's symbol table. NAME is the symbol
820 name. ADDRP is a CORE_ADDR * pointing to where the value of the
821 symbol should be returned. The result is 0 if successful, nonzero
822 if the symbol does not exist in the target environment. This
823 function should not call error() if communication with the target
824 is interrupted, since it is called from symbol reading, but should
825 return nonzero, possibly doing a complain(). */
827 #define target_lookup_symbol(name, addrp) \
828 (*current_target.to_lookup_symbol) (name, addrp)
830 /* Start an inferior process and set inferior_ptid to its pid.
831 EXEC_FILE is the file to run.
832 ALLARGS is a string containing the arguments to the program.
833 ENV is the environment vector to pass. Errors reported with error().
834 On VxWorks and various standalone systems, we ignore exec_file. */
836 void target_create_inferior (char *exec_file, char *args,
837 char **env, int from_tty);
839 /* Some targets (such as ttrace-based HPUX) don't allow us to request
840 notification of inferior events such as fork and vork immediately
841 after the inferior is created. (This because of how gdb gets an
842 inferior created via invoking a shell to do it. In such a scenario,
843 if the shell init file has commands in it, the shell will fork and
844 exec for each of those commands, and we will see each such fork
847 Such targets will supply an appropriate definition for this function. */
849 #define target_post_startup_inferior(ptid) \
850 (*current_target.to_post_startup_inferior) (ptid)
852 /* On some targets, the sequence of starting up an inferior requires
853 some synchronization between gdb and the new inferior process, PID. */
855 #define target_acknowledge_created_inferior(pid) \
856 (*current_target.to_acknowledge_created_inferior) (pid)
858 /* On some targets, we can catch an inferior fork or vfork event when
859 it occurs. These functions insert/remove an already-created
860 catchpoint for such events. */
862 #define target_insert_fork_catchpoint(pid) \
863 (*current_target.to_insert_fork_catchpoint) (pid)
865 #define target_remove_fork_catchpoint(pid) \
866 (*current_target.to_remove_fork_catchpoint) (pid)
868 #define target_insert_vfork_catchpoint(pid) \
869 (*current_target.to_insert_vfork_catchpoint) (pid)
871 #define target_remove_vfork_catchpoint(pid) \
872 (*current_target.to_remove_vfork_catchpoint) (pid)
874 /* If the inferior forks or vforks, this function will be called at
875 the next resume in order to perform any bookkeeping and fiddling
876 necessary to continue debugging either the parent or child, as
877 requested, and releasing the other. Information about the fork
878 or vfork event is available via get_last_target_status ().
879 This function returns 1 if the inferior should not be resumed
880 (i.e. there is another event pending). */
882 int target_follow_fork (int follow_child);
884 /* On some targets, we can catch an inferior exec event when it
885 occurs. These functions insert/remove an already-created
886 catchpoint for such events. */
888 #define target_insert_exec_catchpoint(pid) \
889 (*current_target.to_insert_exec_catchpoint) (pid)
891 #define target_remove_exec_catchpoint(pid) \
892 (*current_target.to_remove_exec_catchpoint) (pid)
894 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
895 exit code of PID, if any. */
897 #define target_has_exited(pid,wait_status,exit_status) \
898 (*current_target.to_has_exited) (pid,wait_status,exit_status)
900 /* The debugger has completed a blocking wait() call. There is now
901 some process event that must be processed. This function should
902 be defined by those targets that require the debugger to perform
903 cleanup or internal state changes in response to the process event. */
905 /* The inferior process has died. Do what is right. */
907 void target_mourn_inferior (void);
909 /* Does target have enough data to do a run or attach command? */
911 #define target_can_run(t) \
914 /* post process changes to signal handling in the inferior. */
916 #define target_notice_signals(ptid) \
917 (*current_target.to_notice_signals) (ptid)
919 /* Check to see if a thread is still alive. */
921 #define target_thread_alive(ptid) \
922 (*current_target.to_thread_alive) (ptid)
924 /* Query for new threads and add them to the thread list. */
926 #define target_find_new_threads() \
927 (*current_target.to_find_new_threads) ()
929 /* Make target stop in a continuable fashion. (For instance, under
930 Unix, this should act like SIGSTOP). This function is normally
931 used by GUIs to implement a stop button. */
933 #define target_stop(ptid) (*current_target.to_stop) (ptid)
935 /* Send the specified COMMAND to the target's monitor
936 (shell,interpreter) for execution. The result of the query is
939 #define target_rcmd(command, outbuf) \
940 (*current_target.to_rcmd) (command, outbuf)
943 /* Does the target include all of memory, or only part of it? This
944 determines whether we look up the target chain for other parts of
945 memory if this target can't satisfy a request. */
947 #define target_has_all_memory \
948 (current_target.to_has_all_memory)
950 /* Does the target include memory? (Dummy targets don't.) */
952 #define target_has_memory \
953 (current_target.to_has_memory)
955 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
956 we start a process.) */
958 #define target_has_stack \
959 (current_target.to_has_stack)
961 /* Does the target have registers? (Exec files don't.) */
963 #define target_has_registers \
964 (current_target.to_has_registers)
966 /* Does the target have execution? Can we make it jump (through
967 hoops), or pop its stack a few times? This means that the current
968 target is currently executing; for some targets, that's the same as
969 whether or not the target is capable of execution, but there are
970 also targets which can be current while not executing. In that
971 case this will become true after target_create_inferior or
974 #define target_has_execution \
975 (current_target.to_has_execution)
977 /* Can the target support the debugger control of thread execution?
978 Can it lock the thread scheduler? */
980 #define target_can_lock_scheduler \
981 (current_target.to_has_thread_control & tc_schedlock)
983 /* Should the target enable async mode if it is supported? Temporary
984 cludge until async mode is a strict superset of sync mode. */
985 extern int target_async_permitted;
987 /* Can the target support asynchronous execution? */
988 #define target_can_async_p() (current_target.to_can_async_p ())
990 /* Is the target in asynchronous execution mode? */
991 #define target_is_async_p() (current_target.to_is_async_p ())
993 int target_supports_non_stop (void);
995 /* Put the target in async mode with the specified callback function. */
996 #define target_async(CALLBACK,CONTEXT) \
997 (current_target.to_async ((CALLBACK), (CONTEXT)))
999 /* This is to be used ONLY within call_function_by_hand(). It provides
1000 a workaround, to have inferior function calls done in sychronous
1001 mode, even though the target is asynchronous. After
1002 target_async_mask(0) is called, calls to target_can_async_p() will
1003 return FALSE , so that target_resume() will not try to start the
1004 target asynchronously. After the inferior stops, we IMMEDIATELY
1005 restore the previous nature of the target, by calling
1006 target_async_mask(1). After that, target_can_async_p() will return
1007 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1009 FIXME ezannoni 1999-12-13: we won't need this once we move
1010 the turning async on and off to the single execution commands,
1011 from where it is done currently, in remote_resume(). */
1013 #define target_async_mask(MASK) \
1014 (current_target.to_async_mask (MASK))
1016 /* Converts a process id to a string. Usually, the string just contains
1017 `process xyz', but on some systems it may contain
1018 `process xyz thread abc'. */
1020 extern char *target_pid_to_str (ptid_t ptid);
1022 extern char *normal_pid_to_str (ptid_t ptid);
1024 /* Return a short string describing extra information about PID,
1025 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1028 #define target_extra_thread_info(TP) \
1029 (current_target.to_extra_thread_info (TP))
1031 /* Attempts to find the pathname of the executable file
1032 that was run to create a specified process.
1034 The process PID must be stopped when this operation is used.
1036 If the executable file cannot be determined, NULL is returned.
1038 Else, a pointer to a character string containing the pathname
1039 is returned. This string should be copied into a buffer by
1040 the client if the string will not be immediately used, or if
1043 #define target_pid_to_exec_file(pid) \
1044 (current_target.to_pid_to_exec_file) (pid)
1047 * Iterator function for target memory regions.
1048 * Calls a callback function once for each memory region 'mapped'
1049 * in the child process. Defined as a simple macro rather than
1050 * as a function macro so that it can be tested for nullity.
1053 #define target_find_memory_regions(FUNC, DATA) \
1054 (current_target.to_find_memory_regions) (FUNC, DATA)
1057 * Compose corefile .note section.
1060 #define target_make_corefile_notes(BFD, SIZE_P) \
1061 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1063 /* Hardware watchpoint interfaces. */
1065 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1068 #ifndef STOPPED_BY_WATCHPOINT
1069 #define STOPPED_BY_WATCHPOINT(w) \
1070 (*current_target.to_stopped_by_watchpoint) ()
1073 /* Non-zero if we have steppable watchpoints */
1075 #ifndef HAVE_STEPPABLE_WATCHPOINT
1076 #define HAVE_STEPPABLE_WATCHPOINT \
1077 (current_target.to_have_steppable_watchpoint)
1080 /* Non-zero if we have continuable watchpoints */
1082 #ifndef HAVE_CONTINUABLE_WATCHPOINT
1083 #define HAVE_CONTINUABLE_WATCHPOINT \
1084 (current_target.to_have_continuable_watchpoint)
1087 /* Provide defaults for hardware watchpoint functions. */
1089 /* If the *_hw_beakpoint functions have not been defined
1090 elsewhere use the definitions in the target vector. */
1092 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1093 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1094 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1095 (including this one?). OTHERTYPE is who knows what... */
1097 #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT
1098 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \
1099 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1102 #ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT
1103 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \
1104 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1108 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1109 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1110 success, non-zero for failure. */
1112 #ifndef target_insert_watchpoint
1113 #define target_insert_watchpoint(addr, len, type) \
1114 (*current_target.to_insert_watchpoint) (addr, len, type)
1116 #define target_remove_watchpoint(addr, len, type) \
1117 (*current_target.to_remove_watchpoint) (addr, len, type)
1120 #ifndef target_insert_hw_breakpoint
1121 #define target_insert_hw_breakpoint(bp_tgt) \
1122 (*current_target.to_insert_hw_breakpoint) (bp_tgt)
1124 #define target_remove_hw_breakpoint(bp_tgt) \
1125 (*current_target.to_remove_hw_breakpoint) (bp_tgt)
1128 #ifndef target_stopped_data_address
1129 #define target_stopped_data_address(target, x) \
1130 (*target.to_stopped_data_address) (target, x)
1133 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1134 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1136 /* Target can execute in reverse? */
1137 #define target_can_execute_reverse \
1138 (current_target.to_can_execute_reverse ? \
1139 current_target.to_can_execute_reverse () : 0)
1141 extern const struct target_desc *target_read_description (struct target_ops *);
1143 #define target_get_ada_task_ptid(lwp, tid) \
1144 (*current_target.to_get_ada_task_ptid) (lwp,tid)
1146 /* Utility implementation of searching memory. */
1147 extern int simple_search_memory (struct target_ops* ops,
1148 CORE_ADDR start_addr,
1149 ULONGEST search_space_len,
1150 const gdb_byte *pattern,
1151 ULONGEST pattern_len,
1152 CORE_ADDR *found_addrp);
1154 /* Main entry point for searching memory. */
1155 extern int target_search_memory (CORE_ADDR start_addr,
1156 ULONGEST search_space_len,
1157 const gdb_byte *pattern,
1158 ULONGEST pattern_len,
1159 CORE_ADDR *found_addrp);
1161 /* Command logging facility. */
1163 #define target_log_command(p) \
1165 if (current_target.to_log_command) \
1166 (*current_target.to_log_command) (p); \
1169 /* Routines for maintenance of the target structures...
1171 add_target: Add a target to the list of all possible targets.
1173 push_target: Make this target the top of the stack of currently used
1174 targets, within its particular stratum of the stack. Result
1175 is 0 if now atop the stack, nonzero if not on top (maybe
1178 unpush_target: Remove this from the stack of currently used targets,
1179 no matter where it is on the list. Returns 0 if no
1180 change, 1 if removed from stack.
1182 pop_target: Remove the top thing on the stack of current targets. */
1184 extern void add_target (struct target_ops *);
1186 extern int push_target (struct target_ops *);
1188 extern int unpush_target (struct target_ops *);
1190 extern void target_pre_inferior (int);
1192 extern void target_preopen (int);
1194 extern void pop_target (void);
1196 /* Does whatever cleanup is required to get rid of all pushed targets.
1197 QUITTING is propagated to target_close; it indicates that GDB is
1198 exiting and should not get hung on an error (otherwise it is
1199 important to perform clean termination, even if it takes a
1201 extern void pop_all_targets (int quitting);
1203 /* Like pop_all_targets, but pops only targets whose stratum is
1204 strictly above ABOVE_STRATUM. */
1205 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1207 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1210 /* Mark a pushed target as running or exited, for targets which do not
1211 automatically pop when not active. */
1213 void target_mark_running (struct target_ops *);
1215 void target_mark_exited (struct target_ops *);
1217 /* Struct section_table maps address ranges to file sections. It is
1218 mostly used with BFD files, but can be used without (e.g. for handling
1219 raw disks, or files not in formats handled by BFD). */
1221 struct section_table
1223 CORE_ADDR addr; /* Lowest address in section */
1224 CORE_ADDR endaddr; /* 1+highest address in section */
1226 struct bfd_section *the_bfd_section;
1228 bfd *bfd; /* BFD file pointer */
1231 /* Return the "section" containing the specified address. */
1232 struct section_table *target_section_by_addr (struct target_ops *target,
1236 /* From mem-break.c */
1238 extern int memory_remove_breakpoint (struct bp_target_info *);
1240 extern int memory_insert_breakpoint (struct bp_target_info *);
1242 extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
1244 extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
1249 extern void initialize_targets (void);
1251 extern NORETURN void noprocess (void) ATTR_NORETURN;
1253 extern void target_require_runnable (void);
1255 extern void find_default_attach (struct target_ops *, char *, int);
1257 extern void find_default_create_inferior (struct target_ops *,
1258 char *, char *, char **, int);
1260 extern struct target_ops *find_run_target (void);
1262 extern struct target_ops *find_core_target (void);
1264 extern struct target_ops *find_target_beneath (struct target_ops *);
1266 extern int target_resize_to_sections (struct target_ops *target,
1269 extern void remove_target_sections (bfd *abfd);
1271 /* Read OS data object of type TYPE from the target, and return it in
1272 XML format. The result is NUL-terminated and returned as a string,
1273 allocated using xmalloc. If an error occurs or the transfer is
1274 unsupported, NULL is returned. Empty objects are returned as
1275 allocated but empty strings. */
1277 extern char *target_get_osdata (const char *type);
1280 /* Stuff that should be shared among the various remote targets. */
1282 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1283 information (higher values, more information). */
1284 extern int remote_debug;
1286 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1287 extern int baud_rate;
1288 /* Timeout limit for response from target. */
1289 extern int remote_timeout;
1292 /* Functions for helping to write a native target. */
1294 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1295 extern void store_waitstatus (struct target_waitstatus *, int);
1297 /* Predicate to target_signal_to_host(). Return non-zero if the enum
1298 targ_signal SIGNO has an equivalent ``host'' representation. */
1299 /* FIXME: cagney/1999-11-22: The name below was chosen in preference
1300 to the shorter target_signal_p() because it is far less ambigious.
1301 In this context ``target_signal'' refers to GDB's internal
1302 representation of the target's set of signals while ``host signal''
1303 refers to the target operating system's signal. Confused? */
1305 extern int target_signal_to_host_p (enum target_signal signo);
1307 /* Convert between host signal numbers and enum target_signal's.
1308 target_signal_to_host() returns 0 and prints a warning() on GDB's
1309 console if SIGNO has no equivalent host representation. */
1310 /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is
1311 refering to the target operating system's signal numbering.
1312 Similarly, ``enum target_signal'' is named incorrectly, ``enum
1313 gdb_signal'' would probably be better as it is refering to GDB's
1314 internal representation of a target operating system's signal. */
1316 extern enum target_signal target_signal_from_host (int);
1317 extern int target_signal_to_host (enum target_signal);
1319 extern enum target_signal default_target_signal_from_host (struct gdbarch *,
1321 extern int default_target_signal_to_host (struct gdbarch *,
1322 enum target_signal);
1324 /* Convert from a number used in a GDB command to an enum target_signal. */
1325 extern enum target_signal target_signal_from_command (int);
1327 /* Set the show memory breakpoints mode to show, and installs a cleanup
1328 to restore it back to the current value. */
1329 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1332 /* Imported from machine dependent code */
1334 /* Blank target vector entries are initialized to target_ignore. */
1335 void target_ignore (void);
1337 extern struct target_ops deprecated_child_ops;
1339 #endif /* !defined (TARGET_H) */