1 /* Interface between GDB and target environments, including files and processes
2 Copyright 1990-1994, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by John Gilmore.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #if !defined (TARGET_H)
25 /* This include file defines the interface between the main part
26 of the debugger, and the part which is target-specific, or
27 specific to the communications interface between us and the
30 A TARGET is an interface between the debugger and a particular
31 kind of file or process. Targets can be STACKED in STRATA,
32 so that more than one target can potentially respond to a request.
33 In particular, memory accesses will walk down the stack of targets
34 until they find a target that is interested in handling that particular
35 address. STRATA are artificial boundaries on the stack, within
36 which particular kinds of targets live. Strata exist so that
37 people don't get confused by pushing e.g. a process target and then
38 a file target, and wondering why they can't see the current values
39 of variables any more (the file target is handling them and they
40 never get to the process target). So when you push a file target,
41 it goes into the file stratum, which is always below the process
49 dummy_stratum
, /* The lowest of the low */
50 file_stratum
, /* Executable files, etc */
51 core_stratum
, /* Core dump files */
52 download_stratum
, /* Downloading of remote targets */
53 process_stratum
, /* Executing processes */
54 thread_stratum
/* Executing threads */
57 enum thread_control_capabilities
59 tc_none
= 0, /* Default: can't control thread execution. */
60 tc_schedlock
= 1, /* Can lock the thread scheduler. */
61 tc_switch
= 2 /* Can switch the running thread on demand. */
64 /* Stuff for target_wait. */
66 /* Generally, what has the program done? */
69 /* The program has exited. The exit status is in value.integer. */
70 TARGET_WAITKIND_EXITED
,
72 /* The program has stopped with a signal. Which signal is in
74 TARGET_WAITKIND_STOPPED
,
76 /* The program has terminated with a signal. Which signal is in
78 TARGET_WAITKIND_SIGNALLED
,
80 /* The program is letting us know that it dynamically loaded something
81 (e.g. it called load(2) on AIX). */
82 TARGET_WAITKIND_LOADED
,
84 /* The program has forked. A "related" process' ID is in
85 value.related_pid. I.e., if the child forks, value.related_pid
86 is the parent's ID. */
88 TARGET_WAITKIND_FORKED
,
90 /* The program has vforked. A "related" process's ID is in
93 TARGET_WAITKIND_VFORKED
,
95 /* The program has exec'ed a new executable file. The new file's
96 pathname is pointed to by value.execd_pathname. */
98 TARGET_WAITKIND_EXECD
,
100 /* The program has entered or returned from a system call. On
101 HP-UX, this is used in the hardware watchpoint implementation.
102 The syscall's unique integer ID number is in value.syscall_id */
104 TARGET_WAITKIND_SYSCALL_ENTRY
,
105 TARGET_WAITKIND_SYSCALL_RETURN
,
107 /* Nothing happened, but we stopped anyway. This perhaps should be handled
108 within target_wait, but I'm not sure target_wait should be resuming the
110 TARGET_WAITKIND_SPURIOUS
,
112 /* This is used for target async and extended-async
113 only. Remote_async_wait() returns this when there is an event
114 on the inferior, but the rest of the world is not interested in
115 it. The inferior has not stopped, but has just sent some output
116 to the console, for instance. In this case, we want to go back
117 to the event loop and wait there for another event from the
118 inferior, rather than being stuck in the remote_async_wait()
119 function. This way the event loop is responsive to other events,
120 like for instance the user typing. */
121 TARGET_WAITKIND_IGNORE
124 /* The numbering of these signals is chosen to match traditional unix
125 signals (insofar as various unices use the same numbers, anyway).
126 It is also the numbering of the GDB remote protocol. Other remote
127 protocols, if they use a different numbering, should make sure to
128 translate appropriately.
130 Since these numbers have actually made it out into other software
131 (stubs, etc.), you mustn't disturb the assigned numbering. If you
132 need to add new signals here, add them to the end of the explicitly
135 This is based strongly on Unix/POSIX signals for several reasons:
136 (1) This set of signals represents a widely-accepted attempt to
137 represent events of this sort in a portable fashion, (2) we want a
138 signal to make it from wait to child_wait to the user intact, (3) many
139 remote protocols use a similar encoding. However, it is
140 recognized that this set of signals has limitations (such as not
141 distinguishing between various kinds of SIGSEGV, or not
142 distinguishing hitting a breakpoint from finishing a single step).
143 So in the future we may get around this either by adding additional
144 signals for breakpoint, single-step, etc., or by adding signal
145 codes; the latter seems more in the spirit of what BSD, System V,
146 etc. are doing to address these issues. */
148 /* For an explanation of what each signal means, see
149 target_signal_to_string. */
153 /* Used some places (e.g. stop_signal) to record the concept that
154 there is no signal. */
156 TARGET_SIGNAL_FIRST
= 0,
157 TARGET_SIGNAL_HUP
= 1,
158 TARGET_SIGNAL_INT
= 2,
159 TARGET_SIGNAL_QUIT
= 3,
160 TARGET_SIGNAL_ILL
= 4,
161 TARGET_SIGNAL_TRAP
= 5,
162 TARGET_SIGNAL_ABRT
= 6,
163 TARGET_SIGNAL_EMT
= 7,
164 TARGET_SIGNAL_FPE
= 8,
165 TARGET_SIGNAL_KILL
= 9,
166 TARGET_SIGNAL_BUS
= 10,
167 TARGET_SIGNAL_SEGV
= 11,
168 TARGET_SIGNAL_SYS
= 12,
169 TARGET_SIGNAL_PIPE
= 13,
170 TARGET_SIGNAL_ALRM
= 14,
171 TARGET_SIGNAL_TERM
= 15,
172 TARGET_SIGNAL_URG
= 16,
173 TARGET_SIGNAL_STOP
= 17,
174 TARGET_SIGNAL_TSTP
= 18,
175 TARGET_SIGNAL_CONT
= 19,
176 TARGET_SIGNAL_CHLD
= 20,
177 TARGET_SIGNAL_TTIN
= 21,
178 TARGET_SIGNAL_TTOU
= 22,
179 TARGET_SIGNAL_IO
= 23,
180 TARGET_SIGNAL_XCPU
= 24,
181 TARGET_SIGNAL_XFSZ
= 25,
182 TARGET_SIGNAL_VTALRM
= 26,
183 TARGET_SIGNAL_PROF
= 27,
184 TARGET_SIGNAL_WINCH
= 28,
185 TARGET_SIGNAL_LOST
= 29,
186 TARGET_SIGNAL_USR1
= 30,
187 TARGET_SIGNAL_USR2
= 31,
188 TARGET_SIGNAL_PWR
= 32,
189 /* Similar to SIGIO. Perhaps they should have the same number. */
190 TARGET_SIGNAL_POLL
= 33,
191 TARGET_SIGNAL_WIND
= 34,
192 TARGET_SIGNAL_PHONE
= 35,
193 TARGET_SIGNAL_WAITING
= 36,
194 TARGET_SIGNAL_LWP
= 37,
195 TARGET_SIGNAL_DANGER
= 38,
196 TARGET_SIGNAL_GRANT
= 39,
197 TARGET_SIGNAL_RETRACT
= 40,
198 TARGET_SIGNAL_MSG
= 41,
199 TARGET_SIGNAL_SOUND
= 42,
200 TARGET_SIGNAL_SAK
= 43,
201 TARGET_SIGNAL_PRIO
= 44,
202 TARGET_SIGNAL_REALTIME_33
= 45,
203 TARGET_SIGNAL_REALTIME_34
= 46,
204 TARGET_SIGNAL_REALTIME_35
= 47,
205 TARGET_SIGNAL_REALTIME_36
= 48,
206 TARGET_SIGNAL_REALTIME_37
= 49,
207 TARGET_SIGNAL_REALTIME_38
= 50,
208 TARGET_SIGNAL_REALTIME_39
= 51,
209 TARGET_SIGNAL_REALTIME_40
= 52,
210 TARGET_SIGNAL_REALTIME_41
= 53,
211 TARGET_SIGNAL_REALTIME_42
= 54,
212 TARGET_SIGNAL_REALTIME_43
= 55,
213 TARGET_SIGNAL_REALTIME_44
= 56,
214 TARGET_SIGNAL_REALTIME_45
= 57,
215 TARGET_SIGNAL_REALTIME_46
= 58,
216 TARGET_SIGNAL_REALTIME_47
= 59,
217 TARGET_SIGNAL_REALTIME_48
= 60,
218 TARGET_SIGNAL_REALTIME_49
= 61,
219 TARGET_SIGNAL_REALTIME_50
= 62,
220 TARGET_SIGNAL_REALTIME_51
= 63,
221 TARGET_SIGNAL_REALTIME_52
= 64,
222 TARGET_SIGNAL_REALTIME_53
= 65,
223 TARGET_SIGNAL_REALTIME_54
= 66,
224 TARGET_SIGNAL_REALTIME_55
= 67,
225 TARGET_SIGNAL_REALTIME_56
= 68,
226 TARGET_SIGNAL_REALTIME_57
= 69,
227 TARGET_SIGNAL_REALTIME_58
= 70,
228 TARGET_SIGNAL_REALTIME_59
= 71,
229 TARGET_SIGNAL_REALTIME_60
= 72,
230 TARGET_SIGNAL_REALTIME_61
= 73,
231 TARGET_SIGNAL_REALTIME_62
= 74,
232 TARGET_SIGNAL_REALTIME_63
= 75,
234 /* Used internally by Solaris threads. See signal(5) on Solaris. */
235 TARGET_SIGNAL_CANCEL
= 76,
237 /* Yes, this pains me, too. But LynxOS didn't have SIG32, and now
238 Linux does, and we can't disturb the numbering, since it's part
239 of the protocol. Note that in some GDB's TARGET_SIGNAL_REALTIME_32
241 TARGET_SIGNAL_REALTIME_32
,
243 #if defined(MACH) || defined(__MACH__)
244 /* Mach exceptions */
245 TARGET_EXC_BAD_ACCESS
,
246 TARGET_EXC_BAD_INSTRUCTION
,
247 TARGET_EXC_ARITHMETIC
,
248 TARGET_EXC_EMULATION
,
250 TARGET_EXC_BREAKPOINT
,
254 /* Some signal we don't know about. */
255 TARGET_SIGNAL_UNKNOWN
,
257 /* Use whatever signal we use when one is not specifically specified
258 (for passing to proceed and so on). */
259 TARGET_SIGNAL_DEFAULT
,
261 /* Last and unused enum value, for sizing arrays, etc. */
265 struct target_waitstatus
267 enum target_waitkind kind
;
269 /* Forked child pid, execd pathname, exit status or signal number. */
273 enum target_signal sig
;
275 char *execd_pathname
;
281 /* Possible types of events that the inferior handler will have to
283 enum inferior_event_type
285 /* There is a request to quit the inferior, abandon it. */
287 /* Process a normal inferior event which will result in target_wait
290 /* Deal with an error on the inferior. */
292 /* We are called because a timer went off. */
294 /* We are called to do stuff after the inferior stops. */
296 /* We are called to do some stuff after the inferior stops, but we
297 are expected to reenter the proceed() and
298 handle_inferior_event() functions. This is used only in case of
299 'step n' like commands. */
303 /* Return the string for a signal. */
304 extern char *target_signal_to_string (enum target_signal
);
306 /* Return the name (SIGHUP, etc.) for a signal. */
307 extern char *target_signal_to_name (enum target_signal
);
309 /* Given a name (SIGHUP, etc.), return its signal. */
310 enum target_signal
target_signal_from_name (char *);
313 /* If certain kinds of activity happen, target_wait should perform
315 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
316 on TARGET_ACTIVITY_FD. */
317 extern int target_activity_fd
;
318 /* Returns zero to leave the inferior alone, one to interrupt it. */
319 extern int (*target_activity_function
) PARAMS ((void));
321 struct thread_info
; /* fwd decl for parameter list below: */
325 char *to_shortname
; /* Name this target type */
326 char *to_longname
; /* Name for printing */
327 char *to_doc
; /* Documentation. Does not include trailing
328 newline, and starts with a one-line descrip-
329 tion (probably similar to to_longname). */
330 void (*to_open
) PARAMS ((char *, int));
331 void (*to_close
) PARAMS ((int));
332 void (*to_attach
) PARAMS ((char *, int));
333 void (*to_post_attach
) PARAMS ((int));
334 void (*to_require_attach
) PARAMS ((char *, int));
335 void (*to_detach
) PARAMS ((char *, int));
336 void (*to_require_detach
) PARAMS ((int, char *, int));
337 void (*to_resume
) PARAMS ((int, int, enum target_signal
));
338 int (*to_wait
) PARAMS ((int, struct target_waitstatus
*));
339 void (*to_post_wait
) PARAMS ((int, int));
340 void (*to_fetch_registers
) PARAMS ((int));
341 void (*to_store_registers
) PARAMS ((int));
342 void (*to_prepare_to_store
) PARAMS ((void));
344 /* Transfer LEN bytes of memory between GDB address MYADDR and
345 target address MEMADDR. If WRITE, transfer them to the target, else
346 transfer them from the target. TARGET is the target from which we
349 Return value, N, is one of the following:
351 0 means that we can't handle this. If errno has been set, it is the
352 error which prevented us from doing it (FIXME: What about bfd_error?).
354 positive (call it N) means that we have transferred N bytes
355 starting at MEMADDR. We might be able to handle more bytes
356 beyond this length, but no promises.
358 negative (call its absolute value N) means that we cannot
359 transfer right at MEMADDR, but we could transfer at least
360 something at MEMADDR + N. */
362 int (*to_xfer_memory
) PARAMS ((CORE_ADDR memaddr
, char *myaddr
,
364 struct target_ops
* target
));
367 /* Enable this after 4.12. */
369 /* Search target memory. Start at STARTADDR and take LEN bytes of
370 target memory, and them with MASK, and compare to DATA. If they
371 match, set *ADDR_FOUND to the address we found it at, store the data
372 we found at LEN bytes starting at DATA_FOUND, and return. If
373 not, add INCREMENT to the search address and keep trying until
374 the search address is outside of the range [LORANGE,HIRANGE).
376 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and
379 void (*to_search
) PARAMS ((int len
, char *data
, char *mask
,
380 CORE_ADDR startaddr
, int increment
,
381 CORE_ADDR lorange
, CORE_ADDR hirange
,
382 CORE_ADDR
* addr_found
, char *data_found
));
384 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
385 (*current_target.to_search) (len, data, mask, startaddr, increment, \
386 lorange, hirange, addr_found, data_found)
389 void (*to_files_info
) PARAMS ((struct target_ops
*));
390 int (*to_insert_breakpoint
) PARAMS ((CORE_ADDR
, char *));
391 int (*to_remove_breakpoint
) PARAMS ((CORE_ADDR
, char *));
392 void (*to_terminal_init
) PARAMS ((void));
393 void (*to_terminal_inferior
) PARAMS ((void));
394 void (*to_terminal_ours_for_output
) PARAMS ((void));
395 void (*to_terminal_ours
) PARAMS ((void));
396 void (*to_terminal_info
) PARAMS ((char *, int));
397 void (*to_kill
) PARAMS ((void));
398 void (*to_load
) PARAMS ((char *, int));
399 int (*to_lookup_symbol
) PARAMS ((char *, CORE_ADDR
*));
400 void (*to_create_inferior
) PARAMS ((char *, char *, char **));
401 void (*to_post_startup_inferior
) PARAMS ((int));
402 void (*to_acknowledge_created_inferior
) PARAMS ((int));
403 void (*to_clone_and_follow_inferior
) PARAMS ((int, int *));
404 void (*to_post_follow_inferior_by_clone
) PARAMS ((void));
405 int (*to_insert_fork_catchpoint
) PARAMS ((int));
406 int (*to_remove_fork_catchpoint
) PARAMS ((int));
407 int (*to_insert_vfork_catchpoint
) PARAMS ((int));
408 int (*to_remove_vfork_catchpoint
) PARAMS ((int));
409 int (*to_has_forked
) PARAMS ((int, int *));
410 int (*to_has_vforked
) PARAMS ((int, int *));
411 int (*to_can_follow_vfork_prior_to_exec
) PARAMS ((void));
412 void (*to_post_follow_vfork
) PARAMS ((int, int, int, int));
413 int (*to_insert_exec_catchpoint
) PARAMS ((int));
414 int (*to_remove_exec_catchpoint
) PARAMS ((int));
415 int (*to_has_execd
) PARAMS ((int, char **));
416 int (*to_reported_exec_events_per_exec_call
) PARAMS ((void));
417 int (*to_has_syscall_event
) PARAMS ((int, enum target_waitkind
*, int *));
418 int (*to_has_exited
) PARAMS ((int, int, int *));
419 void (*to_mourn_inferior
) PARAMS ((void));
420 int (*to_can_run
) PARAMS ((void));
421 void (*to_notice_signals
) PARAMS ((int pid
));
422 int (*to_thread_alive
) PARAMS ((int pid
));
423 void (*to_find_new_threads
) PARAMS ((void));
424 char *(*to_pid_to_str
) PARAMS ((int));
425 char *(*to_extra_thread_info
) PARAMS ((struct thread_info
*));
426 void (*to_stop
) PARAMS ((void));
427 int (*to_query
) PARAMS ((int /*char */ , char *, char *, int *));
428 void (*to_rcmd
) (char *command
, struct ui_file
*output
);
429 struct symtab_and_line
*(*to_enable_exception_callback
) PARAMS ((enum exception_event_kind
, int));
430 struct exception_event_record
*(*to_get_current_exception_event
) PARAMS ((void));
431 char *(*to_pid_to_exec_file
) PARAMS ((int pid
));
432 char *(*to_core_file_to_sym_file
) PARAMS ((char *));
433 enum strata to_stratum
;
435 *DONT_USE
; /* formerly to_next */
436 int to_has_all_memory
;
439 int to_has_registers
;
440 int to_has_execution
;
441 int to_has_thread_control
; /* control thread execution */
446 /* ASYNC target controls */
447 int (*to_can_async_p
) (void);
448 int (*to_is_async_p
) (void);
449 void (*to_async
) (void (*cb
) (enum inferior_event_type
, void *context
),
451 int to_async_mask_value
;
453 /* Need sub-structure for target machine related rather than comm related?
457 /* Magic number for checking ops size. If a struct doesn't end with this
458 number, somebody changed the declaration but didn't change all the
459 places that initialize one. */
461 #define OPS_MAGIC 3840
463 /* The ops structure for our "current" target process. This should
464 never be NULL. If there is no target, it points to the dummy_target. */
466 extern struct target_ops current_target
;
468 /* An item on the target stack. */
470 struct target_stack_item
472 struct target_stack_item
*next
;
473 struct target_ops
*target_ops
;
476 /* The target stack. */
478 extern struct target_stack_item
*target_stack
;
480 /* Define easy words for doing these operations on our current target. */
482 #define target_shortname (current_target.to_shortname)
483 #define target_longname (current_target.to_longname)
485 /* The open routine takes the rest of the parameters from the command,
486 and (if successful) pushes a new target onto the stack.
487 Targets should supply this routine, if only to provide an error message. */
489 #define target_open(name, from_tty) \
490 (*current_target.to_open) (name, from_tty)
492 /* Does whatever cleanup is required for a target that we are no longer
493 going to be calling. Argument says whether we are quitting gdb and
494 should not get hung in case of errors, or whether we want a clean
495 termination even if it takes a while. This routine is automatically
496 always called just before a routine is popped off the target stack.
497 Closing file descriptors and freeing memory are typical things it should
500 #define target_close(quitting) \
501 (*current_target.to_close) (quitting)
503 /* Attaches to a process on the target side. Arguments are as passed
504 to the `attach' command by the user. This routine can be called
505 when the target is not on the target-stack, if the target_can_run
506 routine returns 1; in that case, it must push itself onto the stack.
507 Upon exit, the target should be ready for normal operations, and
508 should be ready to deliver the status of the process immediately
509 (without waiting) to an upcoming target_wait call. */
511 #define target_attach(args, from_tty) \
512 (*current_target.to_attach) (args, from_tty)
514 /* The target_attach operation places a process under debugger control,
515 and stops the process.
517 This operation provides a target-specific hook that allows the
518 necessary bookkeeping to be performed after an attach completes. */
519 #define target_post_attach(pid) \
520 (*current_target.to_post_attach) (pid)
522 /* Attaches to a process on the target side, if not already attached.
523 (If already attached, takes no action.)
525 This operation can be used to follow the child process of a fork.
526 On some targets, such child processes of an original inferior process
527 are automatically under debugger control, and thus do not require an
528 actual attach operation. */
530 #define target_require_attach(args, from_tty) \
531 (*current_target.to_require_attach) (args, from_tty)
533 /* Takes a program previously attached to and detaches it.
534 The program may resume execution (some targets do, some don't) and will
535 no longer stop on signals, etc. We better not have left any breakpoints
536 in the program or it'll die when it hits one. ARGS is arguments
537 typed by the user (e.g. a signal to send the process). FROM_TTY
538 says whether to be verbose or not. */
540 extern void target_detach (char *, int);
542 /* Detaches from a process on the target side, if not already dettached.
543 (If already detached, takes no action.)
545 This operation can be used to follow the parent process of a fork.
546 On some targets, such child processes of an original inferior process
547 are automatically under debugger control, and thus do require an actual
550 PID is the process id of the child to detach from.
551 ARGS is arguments typed by the user (e.g. a signal to send the process).
552 FROM_TTY says whether to be verbose or not. */
554 #define target_require_detach(pid, args, from_tty) \
555 (*current_target.to_require_detach) (pid, args, from_tty)
557 /* Resume execution of the target process PID. STEP says whether to
558 single-step or to run free; SIGGNAL is the signal to be given to
559 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
560 pass TARGET_SIGNAL_DEFAULT. */
562 #define target_resume(pid, step, siggnal) \
563 (*current_target.to_resume) (pid, step, siggnal)
565 /* Wait for process pid to do something. Pid = -1 to wait for any pid
566 to do something. Return pid of child, or -1 in case of error;
567 store status through argument pointer STATUS. Note that it is
568 *not* OK to return_to_top_level out of target_wait without popping
569 the debugging target from the stack; GDB isn't prepared to get back
570 to the prompt with a debugging target but without the frame cache,
571 stop_pc, etc., set up. */
573 #define target_wait(pid, status) \
574 (*current_target.to_wait) (pid, status)
576 /* The target_wait operation waits for a process event to occur, and
577 thereby stop the process.
579 On some targets, certain events may happen in sequences. gdb's
580 correct response to any single event of such a sequence may require
581 knowledge of what earlier events in the sequence have been seen.
583 This operation provides a target-specific hook that allows the
584 necessary bookkeeping to be performed to track such sequences. */
586 #define target_post_wait(pid, status) \
587 (*current_target.to_post_wait) (pid, status)
589 /* Fetch register REGNO, or all regs if regno == -1. No result. */
591 #define target_fetch_registers(regno) \
592 (*current_target.to_fetch_registers) (regno)
594 /* Store at least register REGNO, or all regs if REGNO == -1.
595 It can store as many registers as it wants to, so target_prepare_to_store
596 must have been previously called. Calls error() if there are problems. */
598 #define target_store_registers(regs) \
599 (*current_target.to_store_registers) (regs)
601 /* Get ready to modify the registers array. On machines which store
602 individual registers, this doesn't need to do anything. On machines
603 which store all the registers in one fell swoop, this makes sure
604 that REGISTERS contains all the registers from the program being
607 #define target_prepare_to_store() \
608 (*current_target.to_prepare_to_store) ()
610 extern int target_read_string (CORE_ADDR
, char **, int, int *);
612 extern int target_read_memory (CORE_ADDR memaddr
, char *myaddr
, int len
);
614 extern int target_write_memory (CORE_ADDR
, char *, int);
616 extern int xfer_memory (CORE_ADDR
, char *, int, int, struct target_ops
*);
619 child_xfer_memory (CORE_ADDR
, char *, int, int, struct target_ops
*);
621 /* Make a single attempt at transfering LEN bytes. On a successful
622 transfer, the number of bytes actually transfered is returned and
623 ERR is set to 0. When a transfer fails, -1 is returned (the number
624 of bytes actually transfered is not defined) and ERR is set to a
625 non-zero error indication. */
628 target_read_memory_partial (CORE_ADDR addr
, char *buf
, int len
, int *err
);
631 target_write_memory_partial (CORE_ADDR addr
, char *buf
, int len
, int *err
);
633 extern char *child_pid_to_exec_file (int);
635 extern char *child_core_file_to_sym_file (char *);
637 #if defined(CHILD_POST_ATTACH)
638 extern void child_post_attach (int);
641 extern void child_post_wait (int, int);
643 extern void child_post_startup_inferior (int);
645 extern void child_acknowledge_created_inferior (int);
647 extern void child_clone_and_follow_inferior (int, int *);
649 extern void child_post_follow_inferior_by_clone (void);
651 extern int child_insert_fork_catchpoint (int);
653 extern int child_remove_fork_catchpoint (int);
655 extern int child_insert_vfork_catchpoint (int);
657 extern int child_remove_vfork_catchpoint (int);
659 extern int child_has_forked (int, int *);
661 extern int child_has_vforked (int, int *);
663 extern void child_acknowledge_created_inferior (int);
665 extern int child_can_follow_vfork_prior_to_exec (void);
667 extern void child_post_follow_vfork (int, int, int, int);
669 extern int child_insert_exec_catchpoint (int);
671 extern int child_remove_exec_catchpoint (int);
673 extern int child_has_execd (int, char **);
675 extern int child_reported_exec_events_per_exec_call (void);
677 extern int child_has_syscall_event (int, enum target_waitkind
*, int *);
679 extern int child_has_exited (int, int, int *);
681 extern int child_thread_alive (int);
685 extern void print_section_info (struct target_ops
*, bfd
*);
687 /* Print a line about the current target. */
689 #define target_files_info() \
690 (*current_target.to_files_info) (¤t_target)
692 /* Insert a breakpoint at address ADDR in the target machine.
693 SAVE is a pointer to memory allocated for saving the
694 target contents. It is guaranteed by the caller to be long enough
695 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
698 #define target_insert_breakpoint(addr, save) \
699 (*current_target.to_insert_breakpoint) (addr, save)
701 /* Remove a breakpoint at address ADDR in the target machine.
702 SAVE is a pointer to the same save area
703 that was previously passed to target_insert_breakpoint.
704 Result is 0 for success, or an errno value. */
706 #define target_remove_breakpoint(addr, save) \
707 (*current_target.to_remove_breakpoint) (addr, save)
709 /* Initialize the terminal settings we record for the inferior,
710 before we actually run the inferior. */
712 #define target_terminal_init() \
713 (*current_target.to_terminal_init) ()
715 /* Put the inferior's terminal settings into effect.
716 This is preparation for starting or resuming the inferior. */
718 #define target_terminal_inferior() \
719 (*current_target.to_terminal_inferior) ()
721 /* Put some of our terminal settings into effect,
722 enough to get proper results from our output,
723 but do not change into or out of RAW mode
724 so that no input is discarded.
726 After doing this, either terminal_ours or terminal_inferior
727 should be called to get back to a normal state of affairs. */
729 #define target_terminal_ours_for_output() \
730 (*current_target.to_terminal_ours_for_output) ()
732 /* Put our terminal settings into effect.
733 First record the inferior's terminal settings
734 so they can be restored properly later. */
736 #define target_terminal_ours() \
737 (*current_target.to_terminal_ours) ()
739 /* Print useful information about our terminal status, if such a thing
742 #define target_terminal_info(arg, from_tty) \
743 (*current_target.to_terminal_info) (arg, from_tty)
745 /* Kill the inferior process. Make it go away. */
747 #define target_kill() \
748 (*current_target.to_kill) ()
750 /* Load an executable file into the target process. This is expected
751 to not only bring new code into the target process, but also to
752 update GDB's symbol tables to match. */
754 extern void target_load (char *arg
, int from_tty
);
756 /* Look up a symbol in the target's symbol table. NAME is the symbol
757 name. ADDRP is a CORE_ADDR * pointing to where the value of the
758 symbol should be returned. The result is 0 if successful, nonzero
759 if the symbol does not exist in the target environment. This
760 function should not call error() if communication with the target
761 is interrupted, since it is called from symbol reading, but should
762 return nonzero, possibly doing a complain(). */
764 #define target_lookup_symbol(name, addrp) \
765 (*current_target.to_lookup_symbol) (name, addrp)
767 /* Start an inferior process and set inferior_pid to its pid.
768 EXEC_FILE is the file to run.
769 ALLARGS is a string containing the arguments to the program.
770 ENV is the environment vector to pass. Errors reported with error().
771 On VxWorks and various standalone systems, we ignore exec_file. */
773 #define target_create_inferior(exec_file, args, env) \
774 (*current_target.to_create_inferior) (exec_file, args, env)
777 /* Some targets (such as ttrace-based HPUX) don't allow us to request
778 notification of inferior events such as fork and vork immediately
779 after the inferior is created. (This because of how gdb gets an
780 inferior created via invoking a shell to do it. In such a scenario,
781 if the shell init file has commands in it, the shell will fork and
782 exec for each of those commands, and we will see each such fork
785 Such targets will supply an appropriate definition for this function. */
787 #define target_post_startup_inferior(pid) \
788 (*current_target.to_post_startup_inferior) (pid)
790 /* On some targets, the sequence of starting up an inferior requires
791 some synchronization between gdb and the new inferior process, PID. */
793 #define target_acknowledge_created_inferior(pid) \
794 (*current_target.to_acknowledge_created_inferior) (pid)
796 /* An inferior process has been created via a fork() or similar
797 system call. This function will clone the debugger, then ensure
798 that CHILD_PID is attached to by that debugger.
800 FOLLOWED_CHILD is set TRUE on return *for the clone debugger only*,
801 and FALSE otherwise. (The original and clone debuggers can use this
802 to determine which they are, if need be.)
804 (This is not a terribly useful feature without a GUI to prevent
805 the two debuggers from competing for shell input.) */
807 #define target_clone_and_follow_inferior(child_pid,followed_child) \
808 (*current_target.to_clone_and_follow_inferior) (child_pid, followed_child)
810 /* This operation is intended to be used as the last in a sequence of
811 steps taken when following both parent and child of a fork. This
812 is used by a clone of the debugger, which will follow the child.
814 The original debugger has detached from this process, and the
815 clone has attached to it.
817 On some targets, this requires a bit of cleanup to make it work
820 #define target_post_follow_inferior_by_clone() \
821 (*current_target.to_post_follow_inferior_by_clone) ()
823 /* On some targets, we can catch an inferior fork or vfork event when
824 it occurs. These functions insert/remove an already-created
825 catchpoint for such events. */
827 #define target_insert_fork_catchpoint(pid) \
828 (*current_target.to_insert_fork_catchpoint) (pid)
830 #define target_remove_fork_catchpoint(pid) \
831 (*current_target.to_remove_fork_catchpoint) (pid)
833 #define target_insert_vfork_catchpoint(pid) \
834 (*current_target.to_insert_vfork_catchpoint) (pid)
836 #define target_remove_vfork_catchpoint(pid) \
837 (*current_target.to_remove_vfork_catchpoint) (pid)
839 /* Returns TRUE if PID has invoked the fork() system call. And,
840 also sets CHILD_PID to the process id of the other ("child")
841 inferior process that was created by that call. */
843 #define target_has_forked(pid,child_pid) \
844 (*current_target.to_has_forked) (pid,child_pid)
846 /* Returns TRUE if PID has invoked the vfork() system call. And,
847 also sets CHILD_PID to the process id of the other ("child")
848 inferior process that was created by that call. */
850 #define target_has_vforked(pid,child_pid) \
851 (*current_target.to_has_vforked) (pid,child_pid)
853 /* Some platforms (such as pre-10.20 HP-UX) don't allow us to do
854 anything to a vforked child before it subsequently calls exec().
855 On such platforms, we say that the debugger cannot "follow" the
856 child until it has vforked.
858 This function should be defined to return 1 by those targets
859 which can allow the debugger to immediately follow a vforked
860 child, and 0 if they cannot. */
862 #define target_can_follow_vfork_prior_to_exec() \
863 (*current_target.to_can_follow_vfork_prior_to_exec) ()
865 /* An inferior process has been created via a vfork() system call.
866 The debugger has followed the parent, the child, or both. The
867 process of setting up for that follow may have required some
868 target-specific trickery to track the sequence of reported events.
869 If so, this function should be defined by those targets that
870 require the debugger to perform cleanup or initialization after
873 #define target_post_follow_vfork(parent_pid,followed_parent,child_pid,followed_child) \
874 (*current_target.to_post_follow_vfork) (parent_pid,followed_parent,child_pid,followed_child)
876 /* On some targets, we can catch an inferior exec event when it
877 occurs. These functions insert/remove an already-created
878 catchpoint for such events. */
880 #define target_insert_exec_catchpoint(pid) \
881 (*current_target.to_insert_exec_catchpoint) (pid)
883 #define target_remove_exec_catchpoint(pid) \
884 (*current_target.to_remove_exec_catchpoint) (pid)
886 /* Returns TRUE if PID has invoked a flavor of the exec() system call.
887 And, also sets EXECD_PATHNAME to the pathname of the executable
888 file that was passed to exec(), and is now being executed. */
890 #define target_has_execd(pid,execd_pathname) \
891 (*current_target.to_has_execd) (pid,execd_pathname)
893 /* Returns the number of exec events that are reported when a process
894 invokes a flavor of the exec() system call on this target, if exec
895 events are being reported. */
897 #define target_reported_exec_events_per_exec_call() \
898 (*current_target.to_reported_exec_events_per_exec_call) ()
900 /* Returns TRUE if PID has reported a syscall event. And, also sets
901 KIND to the appropriate TARGET_WAITKIND_, and sets SYSCALL_ID to
902 the unique integer ID of the syscall. */
904 #define target_has_syscall_event(pid,kind,syscall_id) \
905 (*current_target.to_has_syscall_event) (pid,kind,syscall_id)
907 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
908 exit code of PID, if any. */
910 #define target_has_exited(pid,wait_status,exit_status) \
911 (*current_target.to_has_exited) (pid,wait_status,exit_status)
913 /* The debugger has completed a blocking wait() call. There is now
914 some process event that must be processed. This function should
915 be defined by those targets that require the debugger to perform
916 cleanup or internal state changes in response to the process event. */
918 /* The inferior process has died. Do what is right. */
920 #define target_mourn_inferior() \
921 (*current_target.to_mourn_inferior) ()
923 /* Does target have enough data to do a run or attach command? */
925 #define target_can_run(t) \
928 /* post process changes to signal handling in the inferior. */
930 #define target_notice_signals(pid) \
931 (*current_target.to_notice_signals) (pid)
933 /* Check to see if a thread is still alive. */
935 #define target_thread_alive(pid) \
936 (*current_target.to_thread_alive) (pid)
938 /* Query for new threads and add them to the thread list. */
940 #define target_find_new_threads() \
941 (*current_target.to_find_new_threads) (); \
943 /* Make target stop in a continuable fashion. (For instance, under
944 Unix, this should act like SIGSTOP). This function is normally
945 used by GUIs to implement a stop button. */
947 #define target_stop current_target.to_stop
949 /* Queries the target side for some information. The first argument is a
950 letter specifying the type of the query, which is used to determine who
951 should process it. The second argument is a string that specifies which
952 information is desired and the third is a buffer that carries back the
953 response from the target side. The fourth parameter is the size of the
954 output buffer supplied. */
956 #define target_query(query_type, query, resp_buffer, bufffer_size) \
957 (*current_target.to_query) (query_type, query, resp_buffer, bufffer_size)
959 /* Send the specified COMMAND to the target's monitor
960 (shell,interpreter) for execution. The result of the query is
963 #define target_rcmd(command, outbuf) \
964 (*current_target.to_rcmd) (command, outbuf)
967 /* Get the symbol information for a breakpointable routine called when
968 an exception event occurs.
969 Intended mainly for C++, and for those
970 platforms/implementations where such a callback mechanism is available,
971 e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support
972 different mechanisms for debugging exceptions. */
974 #define target_enable_exception_callback(kind, enable) \
975 (*current_target.to_enable_exception_callback) (kind, enable)
977 /* Get the current exception event kind -- throw or catch, etc. */
979 #define target_get_current_exception_event() \
980 (*current_target.to_get_current_exception_event) ()
982 /* Pointer to next target in the chain, e.g. a core file and an exec file. */
984 #define target_next \
985 (current_target.to_next)
987 /* Does the target include all of memory, or only part of it? This
988 determines whether we look up the target chain for other parts of
989 memory if this target can't satisfy a request. */
991 #define target_has_all_memory \
992 (current_target.to_has_all_memory)
994 /* Does the target include memory? (Dummy targets don't.) */
996 #define target_has_memory \
997 (current_target.to_has_memory)
999 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1000 we start a process.) */
1002 #define target_has_stack \
1003 (current_target.to_has_stack)
1005 /* Does the target have registers? (Exec files don't.) */
1007 #define target_has_registers \
1008 (current_target.to_has_registers)
1010 /* Does the target have execution? Can we make it jump (through
1011 hoops), or pop its stack a few times? FIXME: If this is to work that
1012 way, it needs to check whether an inferior actually exists.
1013 remote-udi.c and probably other targets can be the current target
1014 when the inferior doesn't actually exist at the moment. Right now
1015 this just tells us whether this target is *capable* of execution. */
1017 #define target_has_execution \
1018 (current_target.to_has_execution)
1020 /* Can the target support the debugger control of thread execution?
1021 a) Can it lock the thread scheduler?
1022 b) Can it switch the currently running thread? */
1024 #define target_can_lock_scheduler \
1025 (current_target.to_has_thread_control & tc_schedlock)
1027 #define target_can_switch_threads \
1028 (current_target.to_has_thread_control & tc_switch)
1030 /* Can the target support asynchronous execution? */
1031 #define target_can_async_p() (current_target.to_can_async_p ())
1033 /* Is the target in asynchronous execution mode? */
1034 #define target_is_async_p() (current_target.to_is_async_p())
1036 /* Put the target in async mode with the specified callback function. */
1037 #define target_async(CALLBACK,CONTEXT) \
1038 (current_target.to_async((CALLBACK), (CONTEXT)))
1040 /* This is to be used ONLY within run_stack_dummy(). It
1041 provides a workaround, to have inferior function calls done in
1042 sychronous mode, even though the target is asynchronous. After
1043 target_async_mask(0) is called, calls to target_can_async_p() will
1044 return FALSE , so that target_resume() will not try to start the
1045 target asynchronously. After the inferior stops, we IMMEDIATELY
1046 restore the previous nature of the target, by calling
1047 target_async_mask(1). After that, target_can_async_p() will return
1048 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1050 FIXME ezannoni 1999-12-13: we won't need this once we move
1051 the turning async on and off to the single execution commands,
1052 from where it is done currently, in remote_resume(). */
1054 #define target_async_mask_value \
1055 (current_target.to_async_mask_value)
1057 extern int target_async_mask (int mask
);
1059 extern void target_link (char *, CORE_ADDR
*);
1061 /* Converts a process id to a string. Usually, the string just contains
1062 `process xyz', but on some systems it may contain
1063 `process xyz thread abc'. */
1065 #undef target_pid_to_str
1066 #define target_pid_to_str(PID) current_target.to_pid_to_str (PID)
1068 #ifndef target_tid_to_str
1069 #define target_tid_to_str(PID) \
1070 target_pid_to_str (PID)
1071 extern char *normal_pid_to_str (int pid
);
1074 /* Return a short string describing extra information about PID,
1075 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1078 #define target_extra_thread_info(TP) \
1079 (current_target.to_extra_thread_info (TP))
1082 * New Objfile Event Hook:
1084 * Sometimes a GDB component wants to get notified whenever a new
1085 * objfile is loaded. Mainly this is used by thread-debugging
1086 * implementations that need to know when symbols for the target
1087 * thread implemenation are available.
1089 * The old way of doing this is to define a macro 'target_new_objfile'
1090 * that points to the function that you want to be called on every
1091 * objfile/shlib load.
1093 * The new way is to grab the function pointer, 'target_new_objfile_hook',
1094 * and point it to the function that you want to be called on every
1095 * objfile/shlib load.
1097 * If multiple clients are willing to be cooperative, they can each
1098 * save a pointer to the previous value of target_new_objfile_hook
1099 * before modifying it, and arrange for their function to call the
1100 * previous function in the chain. In that way, multiple clients
1101 * can receive this notification (something like with signal handlers).
1104 extern void (*target_new_objfile_hook
) PARAMS ((struct objfile
*));
1106 #ifndef target_pid_or_tid_to_str
1107 #define target_pid_or_tid_to_str(ID) \
1108 target_pid_to_str (ID)
1111 /* Attempts to find the pathname of the executable file
1112 that was run to create a specified process.
1114 The process PID must be stopped when this operation is used.
1116 If the executable file cannot be determined, NULL is returned.
1118 Else, a pointer to a character string containing the pathname
1119 is returned. This string should be copied into a buffer by
1120 the client if the string will not be immediately used, or if
1123 #define target_pid_to_exec_file(pid) \
1124 (current_target.to_pid_to_exec_file) (pid)
1126 /* Hook to call target-dependant code after reading in a new symbol table. */
1128 #ifndef TARGET_SYMFILE_POSTREAD
1129 #define TARGET_SYMFILE_POSTREAD(OBJFILE)
1132 /* Hook to call target dependant code just after inferior target process has
1135 #ifndef TARGET_CREATE_INFERIOR_HOOK
1136 #define TARGET_CREATE_INFERIOR_HOOK(PID)
1139 /* Hardware watchpoint interfaces. */
1141 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1144 #ifndef STOPPED_BY_WATCHPOINT
1145 #define STOPPED_BY_WATCHPOINT(w) 0
1148 /* HP-UX supplies these operations, which respectively disable and enable
1149 the memory page-protections that are used to implement hardware watchpoints
1150 on that platform. See wait_for_inferior's use of these. */
1152 #if !defined(TARGET_DISABLE_HW_WATCHPOINTS)
1153 #define TARGET_DISABLE_HW_WATCHPOINTS(pid)
1156 #if !defined(TARGET_ENABLE_HW_WATCHPOINTS)
1157 #define TARGET_ENABLE_HW_WATCHPOINTS(pid)
1160 /* Provide defaults for systems that don't support hardware watchpoints. */
1162 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
1164 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1165 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1166 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1167 (including this one?). OTHERTYPE is who knows what... */
1169 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
1171 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
1172 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
1173 (LONGEST)(byte_count) <= REGISTER_SIZE
1176 /* However, some addresses may not be profitable to use hardware to watch,
1177 or may be difficult to understand when the addressed object is out of
1178 scope, and hence should be unwatched. On some targets, this may have
1179 severe performance penalties, such that we might as well use regular
1180 watchpoints, and save (possibly precious) hardware watchpoints for other
1183 #if !defined(TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT)
1184 #define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) 0
1188 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1189 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1190 success, non-zero for failure. */
1192 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
1193 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
1195 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
1197 #ifndef target_insert_hw_breakpoint
1198 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
1199 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
1202 #ifndef target_stopped_data_address
1203 #define target_stopped_data_address() 0
1206 /* If defined, then we need to decr pc by this much after a hardware break-
1207 point. Presumably this overrides DECR_PC_AFTER_BREAK... */
1209 #ifndef DECR_PC_AFTER_HW_BREAK
1210 #define DECR_PC_AFTER_HW_BREAK 0
1213 /* Sometimes gdb may pick up what appears to be a valid target address
1214 from a minimal symbol, but the value really means, essentially,
1215 "This is an index into a table which is populated when the inferior
1216 is run. Therefore, do not attempt to use this as a PC." */
1218 #if !defined(PC_REQUIRES_RUN_BEFORE_USE)
1219 #define PC_REQUIRES_RUN_BEFORE_USE(pc) (0)
1222 /* This will only be defined by a target that supports catching vfork events,
1225 On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked
1226 child process after it has exec'd, causes the parent process to resume as
1227 well. To prevent the parent from running spontaneously, such targets should
1228 define this to a function that prevents that from happening. */
1229 #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED)
1230 #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0)
1233 /* This will only be defined by a target that supports catching vfork events,
1236 On some targets (such as HP-UX 10.20 and earlier), a newly vforked child
1237 process must be resumed when it delivers its exec event, before the parent
1238 vfork event will be delivered to us. */
1240 #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK)
1241 #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0)
1244 /* Routines for maintenance of the target structures...
1246 add_target: Add a target to the list of all possible targets.
1248 push_target: Make this target the top of the stack of currently used
1249 targets, within its particular stratum of the stack. Result
1250 is 0 if now atop the stack, nonzero if not on top (maybe
1253 unpush_target: Remove this from the stack of currently used targets,
1254 no matter where it is on the list. Returns 0 if no
1255 change, 1 if removed from stack.
1257 pop_target: Remove the top thing on the stack of current targets. */
1259 extern void add_target (struct target_ops
*);
1261 extern int push_target (struct target_ops
*);
1263 extern int unpush_target (struct target_ops
*);
1265 extern void target_preopen (int);
1267 extern void pop_target (void);
1269 /* Struct section_table maps address ranges to file sections. It is
1270 mostly used with BFD files, but can be used without (e.g. for handling
1271 raw disks, or files not in formats handled by BFD). */
1273 struct section_table
1275 CORE_ADDR addr
; /* Lowest address in section */
1276 CORE_ADDR endaddr
; /* 1+highest address in section */
1278 sec_ptr the_bfd_section
;
1280 bfd
*bfd
; /* BFD file pointer */
1283 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
1284 Returns 0 if OK, 1 on error. */
1287 build_section_table (bfd
*, struct section_table
**, struct section_table
**);
1289 /* From mem-break.c */
1291 extern int memory_remove_breakpoint (CORE_ADDR
, char *);
1293 extern int memory_insert_breakpoint (CORE_ADDR
, char *);
1295 extern int default_memory_remove_breakpoint (CORE_ADDR
, char *);
1297 extern int default_memory_insert_breakpoint (CORE_ADDR
, char *);
1299 extern breakpoint_from_pc_fn memory_breakpoint_from_pc
;
1304 extern void initialize_targets (void);
1306 extern void noprocess (void);
1308 extern void find_default_attach (char *, int);
1310 extern void find_default_require_attach (char *, int);
1312 extern void find_default_require_detach (int, char *, int);
1314 extern void find_default_create_inferior (char *, char *, char **);
1316 extern void find_default_clone_and_follow_inferior (int, int *);
1318 extern struct target_ops
*find_run_target (void);
1320 extern struct target_ops
*find_core_target (void);
1322 extern struct target_ops
*find_target_beneath (struct target_ops
*);
1325 target_resize_to_sections (struct target_ops
*target
, int num_added
);
1327 extern void remove_target_sections (bfd
*abfd
);
1330 /* Stuff that should be shared among the various remote targets. */
1332 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1333 information (higher values, more information). */
1334 extern int remote_debug
;
1336 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1337 extern int baud_rate
;
1338 /* Timeout limit for response from target. */
1339 extern int remote_timeout
;
1342 /* Functions for helping to write a native target. */
1344 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1345 extern void store_waitstatus (struct target_waitstatus
*, int);
1347 /* Predicate to target_signal_to_host(). Return non-zero if the enum
1348 targ_signal SIGNO has an equivalent ``host'' representation. */
1349 /* FIXME: cagney/1999-11-22: The name below was chosen in preference
1350 to the shorter target_signal_p() because it is far less ambigious.
1351 In this context ``target_signal'' refers to GDB's internal
1352 representation of the target's set of signals while ``host signal''
1353 refers to the target operating system's signal. Confused? */
1355 extern int target_signal_to_host_p (enum target_signal signo
);
1357 /* Convert between host signal numbers and enum target_signal's.
1358 target_signal_to_host() returns 0 and prints a warning() on GDB's
1359 console if SIGNO has no equivalent host representation. */
1360 /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is
1361 refering to the target operating system's signal numbering.
1362 Similarly, ``enum target_signal'' is named incorrectly, ``enum
1363 gdb_signal'' would probably be better as it is refering to GDB's
1364 internal representation of a target operating system's signal. */
1366 extern enum target_signal
target_signal_from_host (int);
1367 extern int target_signal_to_host (enum target_signal
);
1369 /* Convert from a number used in a GDB command to an enum target_signal. */
1370 extern enum target_signal
target_signal_from_command (int);
1372 /* Any target can call this to switch to remote protocol (in remote.c). */
1373 extern void push_remote_target (char *name
, int from_tty
);
1375 /* Imported from machine dependent code */
1377 #ifndef SOFTWARE_SINGLE_STEP_P
1378 #define SOFTWARE_SINGLE_STEP_P 0
1379 #define SOFTWARE_SINGLE_STEP(sig,bp_p) \
1380 (internal_error ("SOFTWARE_SINGLE_STEP"), 0)
1381 #endif /* SOFTWARE_SINGLE_STEP_P */
1383 /* Blank target vector entries are initialized to target_ignore. */
1384 void target_ignore (void);
1386 /* Macro for getting target's idea of a frame pointer.
1387 FIXME: GDB's whole scheme for dealing with "frames" and
1388 "frame pointers" needs a serious shakedown. */
1389 #ifndef TARGET_VIRTUAL_FRAME_POINTER
1390 #define TARGET_VIRTUAL_FRAME_POINTER(ADDR, REGP, OFFP) \
1391 do { *(REGP) = FP_REGNUM; *(OFFP) = 0; } while (0)
1392 #endif /* TARGET_VIRTUAL_FRAME_POINTER */
1394 #endif /* !defined (TARGET_H) */