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
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 /* Possible types of events that the inferior handler will have to
156 enum inferior_event_type
158 /* There is a request to quit the inferior, abandon it. */
160 /* Process a normal inferior event which will result in target_wait
163 /* Deal with an error on the inferior. */
165 /* We are called because a timer went off. */
167 /* We are called to do stuff after the inferior stops. */
169 /* We are called to do some stuff after the inferior stops, but we
170 are expected to reenter the proceed() and
171 handle_inferior_event() functions. This is used only in case of
172 'step n' like commands. */
176 /* Return the string for a signal. */
177 extern char *target_signal_to_string (enum target_signal);
179 /* Return the name (SIGHUP, etc.) for a signal. */
180 extern char *target_signal_to_name (enum target_signal);
182 /* Given a name (SIGHUP, etc.), return its signal. */
183 enum target_signal target_signal_from_name (char *);
185 /* Target objects which can be transfered using target_read,
186 target_write, et cetera. */
190 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
192 /* SPU target specific transfer. See "spu-tdep.c". */
194 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
195 TARGET_OBJECT_MEMORY,
196 /* Memory, avoiding GDB's data cache and trusting the executable.
197 Target implementations of to_xfer_partial never need to handle
198 this object, and most callers should not use it. */
199 TARGET_OBJECT_RAW_MEMORY,
200 /* Kernel Unwind Table. See "ia64-tdep.c". */
201 TARGET_OBJECT_UNWIND_TABLE,
202 /* Transfer auxilliary vector. */
204 /* StackGhost cookie. See "sparc-tdep.c". */
205 TARGET_OBJECT_WCOOKIE,
206 /* Target memory map in XML format. */
207 TARGET_OBJECT_MEMORY_MAP,
208 /* Flash memory. This object can be used to write contents to
209 a previously erased flash memory. Using it without erasing
210 flash can have unexpected results. Addresses are physical
211 address on target, and not relative to flash start. */
213 /* Available target-specific features, e.g. registers and coprocessors.
214 See "target-descriptions.c". ANNEX should never be empty. */
215 TARGET_OBJECT_AVAILABLE_FEATURES,
216 /* Currently loaded libraries, in XML format. */
217 TARGET_OBJECT_LIBRARIES
218 /* Possible future objects: TARGET_OBJECT_FILE, TARGET_OBJECT_PROC, ... */
221 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
222 OBJECT. The OFFSET, for a seekable object, specifies the
223 starting point. The ANNEX can be used to provide additional
224 data-specific information to the target.
226 Return the number of bytes actually transfered, or -1 if the
227 transfer is not supported or otherwise fails. Return of a positive
228 value less than LEN indicates that no further transfer is possible.
229 Unlike the raw to_xfer_partial interface, callers of these
230 functions do not need to retry partial transfers. */
232 extern LONGEST target_read (struct target_ops *ops,
233 enum target_object object,
234 const char *annex, gdb_byte *buf,
235 ULONGEST offset, LONGEST len);
237 extern LONGEST target_read_until_error (struct target_ops *ops,
238 enum target_object object,
239 const char *annex, gdb_byte *buf,
240 ULONGEST offset, LONGEST len);
242 extern LONGEST target_write (struct target_ops *ops,
243 enum target_object object,
244 const char *annex, const gdb_byte *buf,
245 ULONGEST offset, LONGEST len);
247 /* Similar to target_write, except that it also calls PROGRESS with
248 the number of bytes written and the opaque BATON after every
249 successful partial write (and before the first write). This is
250 useful for progress reporting and user interaction while writing
251 data. To abort the transfer, the progress callback can throw an
254 LONGEST target_write_with_progress (struct target_ops *ops,
255 enum target_object object,
256 const char *annex, const gdb_byte *buf,
257 ULONGEST offset, LONGEST len,
258 void (*progress) (ULONGEST, void *),
261 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
262 be read using OPS. The return value will be -1 if the transfer
263 fails or is not supported; 0 if the object is empty; or the length
264 of the object otherwise. If a positive value is returned, a
265 sufficiently large buffer will be allocated using xmalloc and
266 returned in *BUF_P containing the contents of the object.
268 This method should be used for objects sufficiently small to store
269 in a single xmalloc'd buffer, when no fixed bound on the object's
270 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
271 through this function. */
273 extern LONGEST target_read_alloc (struct target_ops *ops,
274 enum target_object object,
275 const char *annex, gdb_byte **buf_p);
277 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
278 returned as a string, allocated using xmalloc. If an error occurs
279 or the transfer is unsupported, NULL is returned. Empty objects
280 are returned as allocated but empty strings. A warning is issued
281 if the result contains any embedded NUL bytes. */
283 extern char *target_read_stralloc (struct target_ops *ops,
284 enum target_object object,
287 /* Wrappers to target read/write that perform memory transfers. They
288 throw an error if the memory transfer fails.
290 NOTE: cagney/2003-10-23: The naming schema is lifted from
291 "frame.h". The parameter order is lifted from get_frame_memory,
292 which in turn lifted it from read_memory. */
294 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
295 gdb_byte *buf, LONGEST len);
296 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
297 CORE_ADDR addr, int len);
300 /* If certain kinds of activity happen, target_wait should perform
302 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
303 on TARGET_ACTIVITY_FD. */
304 extern int target_activity_fd;
305 /* Returns zero to leave the inferior alone, one to interrupt it. */
306 extern int (*target_activity_function) (void);
308 struct thread_info; /* fwd decl for parameter list below: */
312 struct target_ops *beneath; /* To the target under this one. */
313 char *to_shortname; /* Name this target type */
314 char *to_longname; /* Name for printing */
315 char *to_doc; /* Documentation. Does not include trailing
316 newline, and starts with a one-line descrip-
317 tion (probably similar to to_longname). */
318 /* Per-target scratch pad. */
320 /* The open routine takes the rest of the parameters from the
321 command, and (if successful) pushes a new target onto the
322 stack. Targets should supply this routine, if only to provide
324 void (*to_open) (char *, int);
325 /* Old targets with a static target vector provide "to_close".
326 New re-entrant targets provide "to_xclose" and that is expected
327 to xfree everything (including the "struct target_ops"). */
328 void (*to_xclose) (struct target_ops *targ, int quitting);
329 void (*to_close) (int);
330 void (*to_attach) (char *, int);
331 void (*to_post_attach) (int);
332 void (*to_detach) (char *, int);
333 void (*to_disconnect) (struct target_ops *, char *, int);
334 void (*to_resume) (ptid_t, int, enum target_signal);
335 ptid_t (*to_wait) (ptid_t, struct target_waitstatus *);
336 void (*to_fetch_registers) (struct regcache *, int);
337 void (*to_store_registers) (struct regcache *, int);
338 void (*to_prepare_to_store) (struct regcache *);
340 /* Transfer LEN bytes of memory between GDB address MYADDR and
341 target address MEMADDR. If WRITE, transfer them to the target, else
342 transfer them from the target. TARGET is the target from which we
345 Return value, N, is one of the following:
347 0 means that we can't handle this. If errno has been set, it is the
348 error which prevented us from doing it (FIXME: What about bfd_error?).
350 positive (call it N) means that we have transferred N bytes
351 starting at MEMADDR. We might be able to handle more bytes
352 beyond this length, but no promises.
354 negative (call its absolute value N) means that we cannot
355 transfer right at MEMADDR, but we could transfer at least
356 something at MEMADDR + N.
358 NOTE: cagney/2004-10-01: This has been entirely superseeded by
359 to_xfer_partial and inferior inheritance. */
361 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
363 struct mem_attrib *attrib,
364 struct target_ops *target);
366 void (*to_files_info) (struct target_ops *);
367 int (*to_insert_breakpoint) (struct bp_target_info *);
368 int (*to_remove_breakpoint) (struct bp_target_info *);
369 int (*to_can_use_hw_breakpoint) (int, int, int);
370 int (*to_insert_hw_breakpoint) (struct bp_target_info *);
371 int (*to_remove_hw_breakpoint) (struct bp_target_info *);
372 int (*to_remove_watchpoint) (CORE_ADDR, int, int);
373 int (*to_insert_watchpoint) (CORE_ADDR, int, int);
374 int (*to_stopped_by_watchpoint) (void);
375 int to_have_steppable_watchpoint;
376 int to_have_continuable_watchpoint;
377 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
378 int (*to_watchpoint_addr_within_range) (struct target_ops *,
379 CORE_ADDR, CORE_ADDR, int);
380 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
381 void (*to_terminal_init) (void);
382 void (*to_terminal_inferior) (void);
383 void (*to_terminal_ours_for_output) (void);
384 void (*to_terminal_ours) (void);
385 void (*to_terminal_save_ours) (void);
386 void (*to_terminal_info) (char *, int);
387 void (*to_kill) (void);
388 void (*to_load) (char *, int);
389 int (*to_lookup_symbol) (char *, CORE_ADDR *);
390 void (*to_create_inferior) (char *, char *, char **, int);
391 void (*to_post_startup_inferior) (ptid_t);
392 void (*to_acknowledge_created_inferior) (int);
393 void (*to_insert_fork_catchpoint) (int);
394 int (*to_remove_fork_catchpoint) (int);
395 void (*to_insert_vfork_catchpoint) (int);
396 int (*to_remove_vfork_catchpoint) (int);
397 int (*to_follow_fork) (struct target_ops *, int);
398 void (*to_insert_exec_catchpoint) (int);
399 int (*to_remove_exec_catchpoint) (int);
400 int (*to_has_exited) (int, int, int *);
401 void (*to_mourn_inferior) (void);
402 int (*to_can_run) (void);
403 void (*to_notice_signals) (ptid_t ptid);
404 int (*to_thread_alive) (ptid_t ptid);
405 void (*to_find_new_threads) (void);
406 char *(*to_pid_to_str) (ptid_t);
407 char *(*to_extra_thread_info) (struct thread_info *);
408 void (*to_stop) (ptid_t);
409 void (*to_rcmd) (char *command, struct ui_file *output);
410 char *(*to_pid_to_exec_file) (int pid);
411 void (*to_log_command) (const char *);
412 enum strata to_stratum;
413 int to_has_all_memory;
416 int to_has_registers;
417 int to_has_execution;
418 int to_has_thread_control; /* control thread execution */
419 int to_attach_no_wait;
424 /* ASYNC target controls */
425 int (*to_can_async_p) (void);
426 int (*to_is_async_p) (void);
427 void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
428 int (*to_async_mask) (int);
429 int (*to_supports_non_stop) (void);
430 int (*to_find_memory_regions) (int (*) (CORE_ADDR,
435 char * (*to_make_corefile_notes) (bfd *, int *);
437 /* Return the thread-local address at OFFSET in the
438 thread-local storage for the thread PTID and the shared library
439 or executable file given by OBJFILE. If that block of
440 thread-local storage hasn't been allocated yet, this function
441 may return an error. */
442 CORE_ADDR (*to_get_thread_local_address) (ptid_t ptid,
443 CORE_ADDR load_module_addr,
446 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
447 OBJECT. The OFFSET, for a seekable object, specifies the
448 starting point. The ANNEX can be used to provide additional
449 data-specific information to the target.
451 Return the number of bytes actually transfered, zero when no
452 further transfer is possible, and -1 when the transfer is not
453 supported. Return of a positive value smaller than LEN does
454 not indicate the end of the object, only the end of the
455 transfer; higher level code should continue transferring if
456 desired. This is handled in target.c.
458 The interface does not support a "retry" mechanism. Instead it
459 assumes that at least one byte will be transfered on each
462 NOTE: cagney/2003-10-17: The current interface can lead to
463 fragmented transfers. Lower target levels should not implement
464 hacks, such as enlarging the transfer, in an attempt to
465 compensate for this. Instead, the target stack should be
466 extended so that it implements supply/collect methods and a
467 look-aside object cache. With that available, the lowest
468 target can safely and freely "push" data up the stack.
470 See target_read and target_write for more information. One,
471 and only one, of readbuf or writebuf must be non-NULL. */
473 LONGEST (*to_xfer_partial) (struct target_ops *ops,
474 enum target_object object, const char *annex,
475 gdb_byte *readbuf, const gdb_byte *writebuf,
476 ULONGEST offset, LONGEST len);
478 /* Returns the memory map for the target. A return value of NULL
479 means that no memory map is available. If a memory address
480 does not fall within any returned regions, it's assumed to be
481 RAM. The returned memory regions should not overlap.
483 The order of regions does not matter; target_memory_map will
484 sort regions by starting address. For that reason, this
485 function should not be called directly except via
488 This method should not cache data; if the memory map could
489 change unexpectedly, it should be invalidated, and higher
490 layers will re-fetch it. */
491 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
493 /* Erases the region of flash memory starting at ADDRESS, of
496 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
497 on flash block boundaries, as reported by 'to_memory_map'. */
498 void (*to_flash_erase) (struct target_ops *,
499 ULONGEST address, LONGEST length);
501 /* Finishes a flash memory write sequence. After this operation
502 all flash memory should be available for writing and the result
503 of reading from areas written by 'to_flash_write' should be
504 equal to what was written. */
505 void (*to_flash_done) (struct target_ops *);
507 /* Describe the architecture-specific features of this target.
508 Returns the description found, or NULL if no description
510 const struct target_desc *(*to_read_description) (struct target_ops *ops);
512 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
513 Return 0 if *READPTR is already at the end of the buffer.
514 Return -1 if there is insufficient buffer for a whole entry.
515 Return 1 if an entry was read into *TYPEP and *VALP. */
516 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
517 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
519 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
520 sequence of bytes in PATTERN with length PATTERN_LEN.
522 The result is 1 if found, 0 if not found, and -1 if there was an error
523 requiring halting of the search (e.g. memory read error).
524 If the pattern is found the address is recorded in FOUND_ADDRP. */
525 int (*to_search_memory) (struct target_ops *ops,
526 CORE_ADDR start_addr, ULONGEST search_space_len,
527 const gdb_byte *pattern, ULONGEST pattern_len,
528 CORE_ADDR *found_addrp);
530 /* Can target execute in reverse? */
531 int (*to_can_execute_reverse) ();
534 /* Need sub-structure for target machine related rather than comm related?
538 /* Magic number for checking ops size. If a struct doesn't end with this
539 number, somebody changed the declaration but didn't change all the
540 places that initialize one. */
542 #define OPS_MAGIC 3840
544 /* The ops structure for our "current" target process. This should
545 never be NULL. If there is no target, it points to the dummy_target. */
547 extern struct target_ops current_target;
549 /* Define easy words for doing these operations on our current target. */
551 #define target_shortname (current_target.to_shortname)
552 #define target_longname (current_target.to_longname)
554 /* Does whatever cleanup is required for a target that we are no
555 longer going to be calling. QUITTING indicates that GDB is exiting
556 and should not get hung on an error (otherwise it is important to
557 perform clean termination, even if it takes a while). This routine
558 is automatically always called when popping the target off the
559 target stack (to_beneath is undefined). Closing file descriptors
560 and freeing all memory allocated memory are typical things it
563 void target_close (struct target_ops *targ, int quitting);
565 /* Attaches to a process on the target side. Arguments are as passed
566 to the `attach' command by the user. This routine can be called
567 when the target is not on the target-stack, if the target_can_run
568 routine returns 1; in that case, it must push itself onto the stack.
569 Upon exit, the target should be ready for normal operations, and
570 should be ready to deliver the status of the process immediately
571 (without waiting) to an upcoming target_wait call. */
573 #define target_attach(args, from_tty) \
574 (*current_target.to_attach) (args, from_tty)
576 /* Some targets don't generate traps when attaching to the inferior,
577 or their target_attach implementation takes care of the waiting.
578 These targets must set to_attach_no_wait. */
580 #define target_attach_no_wait \
581 (current_target.to_attach_no_wait)
583 /* The target_attach operation places a process under debugger control,
584 and stops the process.
586 This operation provides a target-specific hook that allows the
587 necessary bookkeeping to be performed after an attach completes. */
588 #define target_post_attach(pid) \
589 (*current_target.to_post_attach) (pid)
591 /* Takes a program previously attached to and detaches it.
592 The program may resume execution (some targets do, some don't) and will
593 no longer stop on signals, etc. We better not have left any breakpoints
594 in the program or it'll die when it hits one. ARGS is arguments
595 typed by the user (e.g. a signal to send the process). FROM_TTY
596 says whether to be verbose or not. */
598 extern void target_detach (char *, int);
600 /* Disconnect from the current target without resuming it (leaving it
601 waiting for a debugger). */
603 extern void target_disconnect (char *, int);
605 /* Resume execution of the target process PTID. STEP says whether to
606 single-step or to run free; SIGGNAL is the signal to be given to
607 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
608 pass TARGET_SIGNAL_DEFAULT. */
610 extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
612 /* Wait for process pid to do something. PTID = -1 to wait for any
613 pid to do something. Return pid of child, or -1 in case of error;
614 store status through argument pointer STATUS. Note that it is
615 _NOT_ OK to throw_exception() out of target_wait() without popping
616 the debugging target from the stack; GDB isn't prepared to get back
617 to the prompt with a debugging target but without the frame cache,
618 stop_pc, etc., set up. */
620 #define target_wait(ptid, status) \
621 (*current_target.to_wait) (ptid, status)
623 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
625 #define target_fetch_registers(regcache, regno) \
626 (*current_target.to_fetch_registers) (regcache, regno)
628 /* Store at least register REGNO, or all regs if REGNO == -1.
629 It can store as many registers as it wants to, so target_prepare_to_store
630 must have been previously called. Calls error() if there are problems. */
632 #define target_store_registers(regcache, regs) \
633 (*current_target.to_store_registers) (regcache, regs)
635 /* Get ready to modify the registers array. On machines which store
636 individual registers, this doesn't need to do anything. On machines
637 which store all the registers in one fell swoop, this makes sure
638 that REGISTERS contains all the registers from the program being
641 #define target_prepare_to_store(regcache) \
642 (*current_target.to_prepare_to_store) (regcache)
644 extern DCACHE *target_dcache;
646 extern int target_read_string (CORE_ADDR, char **, int, int *);
648 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
650 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
653 extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int,
654 struct mem_attrib *, struct target_ops *);
656 /* Fetches the target's memory map. If one is found it is sorted
657 and returned, after some consistency checking. Otherwise, NULL
659 VEC(mem_region_s) *target_memory_map (void);
661 /* Erase the specified flash region. */
662 void target_flash_erase (ULONGEST address, LONGEST length);
664 /* Finish a sequence of flash operations. */
665 void target_flash_done (void);
667 /* Describes a request for a memory write operation. */
668 struct memory_write_request
670 /* Begining address that must be written. */
672 /* Past-the-end address. */
674 /* The data to write. */
676 /* A callback baton for progress reporting for this request. */
679 typedef struct memory_write_request memory_write_request_s;
680 DEF_VEC_O(memory_write_request_s);
682 /* Enumeration specifying different flash preservation behaviour. */
683 enum flash_preserve_mode
689 /* Write several memory blocks at once. This version can be more
690 efficient than making several calls to target_write_memory, in
691 particular because it can optimize accesses to flash memory.
693 Moreover, this is currently the only memory access function in gdb
694 that supports writing to flash memory, and it should be used for
695 all cases where access to flash memory is desirable.
697 REQUESTS is the vector (see vec.h) of memory_write_request.
698 PRESERVE_FLASH_P indicates what to do with blocks which must be
699 erased, but not completely rewritten.
700 PROGRESS_CB is a function that will be periodically called to provide
701 feedback to user. It will be called with the baton corresponding
702 to the request currently being written. It may also be called
703 with a NULL baton, when preserved flash sectors are being rewritten.
705 The function returns 0 on success, and error otherwise. */
706 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
707 enum flash_preserve_mode preserve_flash_p,
708 void (*progress_cb) (ULONGEST, void *));
712 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
714 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
716 extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
720 extern void print_section_info (struct target_ops *, bfd *);
722 /* Print a line about the current target. */
724 #define target_files_info() \
725 (*current_target.to_files_info) (¤t_target)
727 /* Insert a breakpoint at address BP_TGT->placed_address in the target
728 machine. Result is 0 for success, or an errno value. */
730 #define target_insert_breakpoint(bp_tgt) \
731 (*current_target.to_insert_breakpoint) (bp_tgt)
733 /* Remove a breakpoint at address BP_TGT->placed_address in the target
734 machine. Result is 0 for success, or an errno value. */
736 #define target_remove_breakpoint(bp_tgt) \
737 (*current_target.to_remove_breakpoint) (bp_tgt)
739 /* Initialize the terminal settings we record for the inferior,
740 before we actually run the inferior. */
742 #define target_terminal_init() \
743 (*current_target.to_terminal_init) ()
745 /* Put the inferior's terminal settings into effect.
746 This is preparation for starting or resuming the inferior. */
748 #define target_terminal_inferior() \
749 (*current_target.to_terminal_inferior) ()
751 /* Put some of our terminal settings into effect,
752 enough to get proper results from our output,
753 but do not change into or out of RAW mode
754 so that no input is discarded.
756 After doing this, either terminal_ours or terminal_inferior
757 should be called to get back to a normal state of affairs. */
759 #define target_terminal_ours_for_output() \
760 (*current_target.to_terminal_ours_for_output) ()
762 /* Put our terminal settings into effect.
763 First record the inferior's terminal settings
764 so they can be restored properly later. */
766 #define target_terminal_ours() \
767 (*current_target.to_terminal_ours) ()
769 /* Save our terminal settings.
770 This is called from TUI after entering or leaving the curses
771 mode. Since curses modifies our terminal this call is here
772 to take this change into account. */
774 #define target_terminal_save_ours() \
775 (*current_target.to_terminal_save_ours) ()
777 /* Print useful information about our terminal status, if such a thing
780 #define target_terminal_info(arg, from_tty) \
781 (*current_target.to_terminal_info) (arg, from_tty)
783 /* Kill the inferior process. Make it go away. */
785 #define target_kill() \
786 (*current_target.to_kill) ()
788 /* Load an executable file into the target process. This is expected
789 to not only bring new code into the target process, but also to
790 update GDB's symbol tables to match.
792 ARG contains command-line arguments, to be broken down with
793 buildargv (). The first non-switch argument is the filename to
794 load, FILE; the second is a number (as parsed by strtoul (..., ...,
795 0)), which is an offset to apply to the load addresses of FILE's
796 sections. The target may define switches, or other non-switch
797 arguments, as it pleases. */
799 extern void target_load (char *arg, int from_tty);
801 /* Look up a symbol in the target's symbol table. NAME is the symbol
802 name. ADDRP is a CORE_ADDR * pointing to where the value of the
803 symbol should be returned. The result is 0 if successful, nonzero
804 if the symbol does not exist in the target environment. This
805 function should not call error() if communication with the target
806 is interrupted, since it is called from symbol reading, but should
807 return nonzero, possibly doing a complain(). */
809 #define target_lookup_symbol(name, addrp) \
810 (*current_target.to_lookup_symbol) (name, addrp)
812 /* Start an inferior process and set inferior_ptid to its pid.
813 EXEC_FILE is the file to run.
814 ALLARGS is a string containing the arguments to the program.
815 ENV is the environment vector to pass. Errors reported with error().
816 On VxWorks and various standalone systems, we ignore exec_file. */
818 #define target_create_inferior(exec_file, args, env, FROM_TTY) \
819 (*current_target.to_create_inferior) (exec_file, args, env, (FROM_TTY))
822 /* Some targets (such as ttrace-based HPUX) don't allow us to request
823 notification of inferior events such as fork and vork immediately
824 after the inferior is created. (This because of how gdb gets an
825 inferior created via invoking a shell to do it. In such a scenario,
826 if the shell init file has commands in it, the shell will fork and
827 exec for each of those commands, and we will see each such fork
830 Such targets will supply an appropriate definition for this function. */
832 #define target_post_startup_inferior(ptid) \
833 (*current_target.to_post_startup_inferior) (ptid)
835 /* On some targets, the sequence of starting up an inferior requires
836 some synchronization between gdb and the new inferior process, PID. */
838 #define target_acknowledge_created_inferior(pid) \
839 (*current_target.to_acknowledge_created_inferior) (pid)
841 /* On some targets, we can catch an inferior fork or vfork event when
842 it occurs. These functions insert/remove an already-created
843 catchpoint for such events. */
845 #define target_insert_fork_catchpoint(pid) \
846 (*current_target.to_insert_fork_catchpoint) (pid)
848 #define target_remove_fork_catchpoint(pid) \
849 (*current_target.to_remove_fork_catchpoint) (pid)
851 #define target_insert_vfork_catchpoint(pid) \
852 (*current_target.to_insert_vfork_catchpoint) (pid)
854 #define target_remove_vfork_catchpoint(pid) \
855 (*current_target.to_remove_vfork_catchpoint) (pid)
857 /* If the inferior forks or vforks, this function will be called at
858 the next resume in order to perform any bookkeeping and fiddling
859 necessary to continue debugging either the parent or child, as
860 requested, and releasing the other. Information about the fork
861 or vfork event is available via get_last_target_status ().
862 This function returns 1 if the inferior should not be resumed
863 (i.e. there is another event pending). */
865 int target_follow_fork (int follow_child);
867 /* On some targets, we can catch an inferior exec event when it
868 occurs. These functions insert/remove an already-created
869 catchpoint for such events. */
871 #define target_insert_exec_catchpoint(pid) \
872 (*current_target.to_insert_exec_catchpoint) (pid)
874 #define target_remove_exec_catchpoint(pid) \
875 (*current_target.to_remove_exec_catchpoint) (pid)
877 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
878 exit code of PID, if any. */
880 #define target_has_exited(pid,wait_status,exit_status) \
881 (*current_target.to_has_exited) (pid,wait_status,exit_status)
883 /* The debugger has completed a blocking wait() call. There is now
884 some process event that must be processed. This function should
885 be defined by those targets that require the debugger to perform
886 cleanup or internal state changes in response to the process event. */
888 /* The inferior process has died. Do what is right. */
890 #define target_mourn_inferior() \
891 (*current_target.to_mourn_inferior) ()
893 /* Does target have enough data to do a run or attach command? */
895 #define target_can_run(t) \
898 /* post process changes to signal handling in the inferior. */
900 #define target_notice_signals(ptid) \
901 (*current_target.to_notice_signals) (ptid)
903 /* Check to see if a thread is still alive. */
905 #define target_thread_alive(ptid) \
906 (*current_target.to_thread_alive) (ptid)
908 /* Query for new threads and add them to the thread list. */
910 #define target_find_new_threads() \
911 (*current_target.to_find_new_threads) ()
913 /* Make target stop in a continuable fashion. (For instance, under
914 Unix, this should act like SIGSTOP). This function is normally
915 used by GUIs to implement a stop button. */
917 #define target_stop(ptid) (*current_target.to_stop) (ptid)
919 /* Send the specified COMMAND to the target's monitor
920 (shell,interpreter) for execution. The result of the query is
923 #define target_rcmd(command, outbuf) \
924 (*current_target.to_rcmd) (command, outbuf)
927 /* Does the target include all of memory, or only part of it? This
928 determines whether we look up the target chain for other parts of
929 memory if this target can't satisfy a request. */
931 #define target_has_all_memory \
932 (current_target.to_has_all_memory)
934 /* Does the target include memory? (Dummy targets don't.) */
936 #define target_has_memory \
937 (current_target.to_has_memory)
939 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
940 we start a process.) */
942 #define target_has_stack \
943 (current_target.to_has_stack)
945 /* Does the target have registers? (Exec files don't.) */
947 #define target_has_registers \
948 (current_target.to_has_registers)
950 /* Does the target have execution? Can we make it jump (through
951 hoops), or pop its stack a few times? This means that the current
952 target is currently executing; for some targets, that's the same as
953 whether or not the target is capable of execution, but there are
954 also targets which can be current while not executing. In that
955 case this will become true after target_create_inferior or
958 #define target_has_execution \
959 (current_target.to_has_execution)
961 /* Can the target support the debugger control of thread execution?
962 Can it lock the thread scheduler? */
964 #define target_can_lock_scheduler \
965 (current_target.to_has_thread_control & tc_schedlock)
967 /* Should the target enable async mode if it is supported? Temporary
968 cludge until async mode is a strict superset of sync mode. */
969 extern int target_async_permitted;
971 /* Can the target support asynchronous execution? */
972 #define target_can_async_p() (current_target.to_can_async_p ())
974 /* Is the target in asynchronous execution mode? */
975 #define target_is_async_p() (current_target.to_is_async_p ())
977 int target_supports_non_stop (void);
979 /* Put the target in async mode with the specified callback function. */
980 #define target_async(CALLBACK,CONTEXT) \
981 (current_target.to_async ((CALLBACK), (CONTEXT)))
983 /* This is to be used ONLY within call_function_by_hand(). It provides
984 a workaround, to have inferior function calls done in sychronous
985 mode, even though the target is asynchronous. After
986 target_async_mask(0) is called, calls to target_can_async_p() will
987 return FALSE , so that target_resume() will not try to start the
988 target asynchronously. After the inferior stops, we IMMEDIATELY
989 restore the previous nature of the target, by calling
990 target_async_mask(1). After that, target_can_async_p() will return
991 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
993 FIXME ezannoni 1999-12-13: we won't need this once we move
994 the turning async on and off to the single execution commands,
995 from where it is done currently, in remote_resume(). */
997 #define target_async_mask(MASK) \
998 (current_target.to_async_mask (MASK))
1000 /* Converts a process id to a string. Usually, the string just contains
1001 `process xyz', but on some systems it may contain
1002 `process xyz thread abc'. */
1004 #undef target_pid_to_str
1005 #define target_pid_to_str(PID) current_target.to_pid_to_str (PID)
1007 #ifndef target_tid_to_str
1008 #define target_tid_to_str(PID) \
1009 target_pid_to_str (PID)
1010 extern char *normal_pid_to_str (ptid_t ptid);
1013 /* Return a short string describing extra information about PID,
1014 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1017 #define target_extra_thread_info(TP) \
1018 (current_target.to_extra_thread_info (TP))
1020 /* Attempts to find the pathname of the executable file
1021 that was run to create a specified process.
1023 The process PID must be stopped when this operation is used.
1025 If the executable file cannot be determined, NULL is returned.
1027 Else, a pointer to a character string containing the pathname
1028 is returned. This string should be copied into a buffer by
1029 the client if the string will not be immediately used, or if
1032 #define target_pid_to_exec_file(pid) \
1033 (current_target.to_pid_to_exec_file) (pid)
1036 * Iterator function for target memory regions.
1037 * Calls a callback function once for each memory region 'mapped'
1038 * in the child process. Defined as a simple macro rather than
1039 * as a function macro so that it can be tested for nullity.
1042 #define target_find_memory_regions(FUNC, DATA) \
1043 (current_target.to_find_memory_regions) (FUNC, DATA)
1046 * Compose corefile .note section.
1049 #define target_make_corefile_notes(BFD, SIZE_P) \
1050 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1052 /* Thread-local values. */
1053 #define target_get_thread_local_address \
1054 (current_target.to_get_thread_local_address)
1055 #define target_get_thread_local_address_p() \
1056 (target_get_thread_local_address != NULL)
1059 /* Hardware watchpoint interfaces. */
1061 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1064 #ifndef STOPPED_BY_WATCHPOINT
1065 #define STOPPED_BY_WATCHPOINT(w) \
1066 (*current_target.to_stopped_by_watchpoint) ()
1069 /* Non-zero if we have steppable watchpoints */
1071 #ifndef HAVE_STEPPABLE_WATCHPOINT
1072 #define HAVE_STEPPABLE_WATCHPOINT \
1073 (current_target.to_have_steppable_watchpoint)
1076 /* Non-zero if we have continuable watchpoints */
1078 #ifndef HAVE_CONTINUABLE_WATCHPOINT
1079 #define HAVE_CONTINUABLE_WATCHPOINT \
1080 (current_target.to_have_continuable_watchpoint)
1083 /* Provide defaults for hardware watchpoint functions. */
1085 /* If the *_hw_beakpoint functions have not been defined
1086 elsewhere use the definitions in the target vector. */
1088 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1089 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1090 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1091 (including this one?). OTHERTYPE is who knows what... */
1093 #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT
1094 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \
1095 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1098 #ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT
1099 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \
1100 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1104 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1105 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1106 success, non-zero for failure. */
1108 #ifndef target_insert_watchpoint
1109 #define target_insert_watchpoint(addr, len, type) \
1110 (*current_target.to_insert_watchpoint) (addr, len, type)
1112 #define target_remove_watchpoint(addr, len, type) \
1113 (*current_target.to_remove_watchpoint) (addr, len, type)
1116 #ifndef target_insert_hw_breakpoint
1117 #define target_insert_hw_breakpoint(bp_tgt) \
1118 (*current_target.to_insert_hw_breakpoint) (bp_tgt)
1120 #define target_remove_hw_breakpoint(bp_tgt) \
1121 (*current_target.to_remove_hw_breakpoint) (bp_tgt)
1124 extern int target_stopped_data_address_p (struct target_ops *);
1126 #ifndef target_stopped_data_address
1127 #define target_stopped_data_address(target, x) \
1128 (*target.to_stopped_data_address) (target, x)
1130 /* Horrible hack to get around existing macros :-(. */
1131 #define target_stopped_data_address_p(CURRENT_TARGET) (1)
1134 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1135 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1137 /* Target can execute in reverse? */
1138 #define target_can_execute_reverse \
1139 (current_target.to_can_execute_reverse ? \
1140 current_target.to_can_execute_reverse () : 0)
1142 extern const struct target_desc *target_read_description (struct target_ops *);
1144 /* Utility implementation of searching memory. */
1145 extern int simple_search_memory (struct target_ops* ops,
1146 CORE_ADDR start_addr,
1147 ULONGEST search_space_len,
1148 const gdb_byte *pattern,
1149 ULONGEST pattern_len,
1150 CORE_ADDR *found_addrp);
1152 /* Main entry point for searching memory. */
1153 extern int target_search_memory (CORE_ADDR start_addr,
1154 ULONGEST search_space_len,
1155 const gdb_byte *pattern,
1156 ULONGEST pattern_len,
1157 CORE_ADDR *found_addrp);
1159 /* Command logging facility. */
1161 #define target_log_command(p) \
1163 if (current_target.to_log_command) \
1164 (*current_target.to_log_command) (p); \
1167 /* Routines for maintenance of the target structures...
1169 add_target: Add a target to the list of all possible targets.
1171 push_target: Make this target the top of the stack of currently used
1172 targets, within its particular stratum of the stack. Result
1173 is 0 if now atop the stack, nonzero if not on top (maybe
1176 unpush_target: Remove this from the stack of currently used targets,
1177 no matter where it is on the list. Returns 0 if no
1178 change, 1 if removed from stack.
1180 pop_target: Remove the top thing on the stack of current targets. */
1182 extern void add_target (struct target_ops *);
1184 extern int push_target (struct target_ops *);
1186 extern int unpush_target (struct target_ops *);
1188 extern void target_pre_inferior (int);
1190 extern void target_preopen (int);
1192 extern void pop_target (void);
1194 /* Does whatever cleanup is required to get rid of all pushed targets.
1195 QUITTING is propagated to target_close; it indicates that GDB is
1196 exiting and should not get hung on an error (otherwise it is
1197 important to perform clean termination, even if it takes a
1199 extern void pop_all_targets (int quitting);
1201 /* Like pop_all_targets, but pops only targets whose stratum is
1202 strictly above ABOVE_STRATUM. */
1203 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1205 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1208 /* Mark a pushed target as running or exited, for targets which do not
1209 automatically pop when not active. */
1211 void target_mark_running (struct target_ops *);
1213 void target_mark_exited (struct target_ops *);
1215 /* Struct section_table maps address ranges to file sections. It is
1216 mostly used with BFD files, but can be used without (e.g. for handling
1217 raw disks, or files not in formats handled by BFD). */
1219 struct section_table
1221 CORE_ADDR addr; /* Lowest address in section */
1222 CORE_ADDR endaddr; /* 1+highest address in section */
1224 struct bfd_section *the_bfd_section;
1226 bfd *bfd; /* BFD file pointer */
1229 /* Return the "section" containing the specified address. */
1230 struct section_table *target_section_by_addr (struct target_ops *target,
1234 /* From mem-break.c */
1236 extern int memory_remove_breakpoint (struct bp_target_info *);
1238 extern int memory_insert_breakpoint (struct bp_target_info *);
1240 extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
1242 extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
1247 extern void initialize_targets (void);
1249 extern void noprocess (void);
1251 extern void target_require_runnable (void);
1253 extern void find_default_attach (char *, int);
1255 extern void find_default_create_inferior (char *, char *, char **, int);
1257 extern struct target_ops *find_run_target (void);
1259 extern struct target_ops *find_core_target (void);
1261 extern struct target_ops *find_target_beneath (struct target_ops *);
1263 extern int target_resize_to_sections (struct target_ops *target,
1266 extern void remove_target_sections (bfd *abfd);
1269 /* Stuff that should be shared among the various remote targets. */
1271 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1272 information (higher values, more information). */
1273 extern int remote_debug;
1275 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1276 extern int baud_rate;
1277 /* Timeout limit for response from target. */
1278 extern int remote_timeout;
1281 /* Functions for helping to write a native target. */
1283 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1284 extern void store_waitstatus (struct target_waitstatus *, int);
1286 /* Predicate to target_signal_to_host(). Return non-zero if the enum
1287 targ_signal SIGNO has an equivalent ``host'' representation. */
1288 /* FIXME: cagney/1999-11-22: The name below was chosen in preference
1289 to the shorter target_signal_p() because it is far less ambigious.
1290 In this context ``target_signal'' refers to GDB's internal
1291 representation of the target's set of signals while ``host signal''
1292 refers to the target operating system's signal. Confused? */
1294 extern int target_signal_to_host_p (enum target_signal signo);
1296 /* Convert between host signal numbers and enum target_signal's.
1297 target_signal_to_host() returns 0 and prints a warning() on GDB's
1298 console if SIGNO has no equivalent host representation. */
1299 /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is
1300 refering to the target operating system's signal numbering.
1301 Similarly, ``enum target_signal'' is named incorrectly, ``enum
1302 gdb_signal'' would probably be better as it is refering to GDB's
1303 internal representation of a target operating system's signal. */
1305 extern enum target_signal target_signal_from_host (int);
1306 extern int target_signal_to_host (enum target_signal);
1308 extern enum target_signal default_target_signal_from_host (struct gdbarch *,
1310 extern int default_target_signal_to_host (struct gdbarch *,
1311 enum target_signal);
1313 /* Convert from a number used in a GDB command to an enum target_signal. */
1314 extern enum target_signal target_signal_from_command (int);
1316 /* Set the show memory breakpoints mode to show, and installs a cleanup
1317 to restore it back to the current value. */
1318 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1321 /* Imported from machine dependent code */
1323 /* Blank target vector entries are initialized to target_ignore. */
1324 void target_ignore (void);
1326 extern struct target_ops deprecated_child_ops;
1328 #endif /* !defined (TARGET_H) */