1 /* Interface between GDB and target environments, including files and processes
2 Copyright 1990, 91, 92, 93, 94, 1999 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 value.sig. */
73 TARGET_WAITKIND_STOPPED,
75 /* The program has terminated with a signal. Which signal is in
77 TARGET_WAITKIND_SIGNALLED,
79 /* The program is letting us know that it dynamically loaded something
80 (e.g. it called load(2) on AIX). */
81 TARGET_WAITKIND_LOADED,
83 /* The program has forked. A "related" process' ID is in value.related_pid.
84 I.e., if the child forks, value.related_pid is the parent's ID.
86 TARGET_WAITKIND_FORKED,
88 /* The program has vforked. A "related" process's ID is in value.related_pid.
90 TARGET_WAITKIND_VFORKED,
92 /* The program has exec'ed a new executable file. The new file's pathname
93 is pointed to by value.execd_pathname.
95 TARGET_WAITKIND_EXECD,
97 /* The program has entered or returned from a system call. On HP-UX, this
98 is used in the hardware watchpoint implementation. The syscall's unique
99 integer ID number is in value.syscall_id;
101 TARGET_WAITKIND_SYSCALL_ENTRY,
102 TARGET_WAITKIND_SYSCALL_RETURN,
104 /* Nothing happened, but we stopped anyway. This perhaps should be handled
105 within target_wait, but I'm not sure target_wait should be resuming the
107 TARGET_WAITKIND_SPURIOUS,
109 /* This is used for target async and extended-async
110 only. Remote_async_wait() returns this when there is an event
111 on the inferior, but the rest of the world is not interested in
112 it. The inferior has not stopped, but has just sent some output
113 to the console, for instance. In this case, we want to go back
114 to the event loop and wait there for another event from the
115 inferior, rather than being stuck in the remote_async_wait()
116 function. This way the event loop is responsive to other events,
117 like for instance the user typing. */
118 TARGET_WAITKIND_IGNORE
121 /* The numbering of these signals is chosen to match traditional unix
122 signals (insofar as various unices use the same numbers, anyway).
123 It is also the numbering of the GDB remote protocol. Other remote
124 protocols, if they use a different numbering, should make sure to
125 translate appropriately.
127 Since these numbers have actually made it out into other software
128 (stubs, etc.), you mustn't disturb the assigned numbering. If you
129 need to add new signals here, add them to the end of the explicitly
132 This is based strongly on Unix/POSIX signals for several reasons:
133 (1) This set of signals represents a widely-accepted attempt to
134 represent events of this sort in a portable fashion, (2) we want a
135 signal to make it from wait to child_wait to the user intact, (3) many
136 remote protocols use a similar encoding. However, it is
137 recognized that this set of signals has limitations (such as not
138 distinguishing between various kinds of SIGSEGV, or not
139 distinguishing hitting a breakpoint from finishing a single step).
140 So in the future we may get around this either by adding additional
141 signals for breakpoint, single-step, etc., or by adding signal
142 codes; the latter seems more in the spirit of what BSD, System V,
143 etc. are doing to address these issues. */
145 /* For an explanation of what each signal means, see
146 target_signal_to_string. */
150 /* Used some places (e.g. stop_signal) to record the concept that
151 there is no signal. */
153 TARGET_SIGNAL_FIRST = 0,
154 TARGET_SIGNAL_HUP = 1,
155 TARGET_SIGNAL_INT = 2,
156 TARGET_SIGNAL_QUIT = 3,
157 TARGET_SIGNAL_ILL = 4,
158 TARGET_SIGNAL_TRAP = 5,
159 TARGET_SIGNAL_ABRT = 6,
160 TARGET_SIGNAL_EMT = 7,
161 TARGET_SIGNAL_FPE = 8,
162 TARGET_SIGNAL_KILL = 9,
163 TARGET_SIGNAL_BUS = 10,
164 TARGET_SIGNAL_SEGV = 11,
165 TARGET_SIGNAL_SYS = 12,
166 TARGET_SIGNAL_PIPE = 13,
167 TARGET_SIGNAL_ALRM = 14,
168 TARGET_SIGNAL_TERM = 15,
169 TARGET_SIGNAL_URG = 16,
170 TARGET_SIGNAL_STOP = 17,
171 TARGET_SIGNAL_TSTP = 18,
172 TARGET_SIGNAL_CONT = 19,
173 TARGET_SIGNAL_CHLD = 20,
174 TARGET_SIGNAL_TTIN = 21,
175 TARGET_SIGNAL_TTOU = 22,
176 TARGET_SIGNAL_IO = 23,
177 TARGET_SIGNAL_XCPU = 24,
178 TARGET_SIGNAL_XFSZ = 25,
179 TARGET_SIGNAL_VTALRM = 26,
180 TARGET_SIGNAL_PROF = 27,
181 TARGET_SIGNAL_WINCH = 28,
182 TARGET_SIGNAL_LOST = 29,
183 TARGET_SIGNAL_USR1 = 30,
184 TARGET_SIGNAL_USR2 = 31,
185 TARGET_SIGNAL_PWR = 32,
186 /* Similar to SIGIO. Perhaps they should have the same number. */
187 TARGET_SIGNAL_POLL = 33,
188 TARGET_SIGNAL_WIND = 34,
189 TARGET_SIGNAL_PHONE = 35,
190 TARGET_SIGNAL_WAITING = 36,
191 TARGET_SIGNAL_LWP = 37,
192 TARGET_SIGNAL_DANGER = 38,
193 TARGET_SIGNAL_GRANT = 39,
194 TARGET_SIGNAL_RETRACT = 40,
195 TARGET_SIGNAL_MSG = 41,
196 TARGET_SIGNAL_SOUND = 42,
197 TARGET_SIGNAL_SAK = 43,
198 TARGET_SIGNAL_PRIO = 44,
199 TARGET_SIGNAL_REALTIME_33 = 45,
200 TARGET_SIGNAL_REALTIME_34 = 46,
201 TARGET_SIGNAL_REALTIME_35 = 47,
202 TARGET_SIGNAL_REALTIME_36 = 48,
203 TARGET_SIGNAL_REALTIME_37 = 49,
204 TARGET_SIGNAL_REALTIME_38 = 50,
205 TARGET_SIGNAL_REALTIME_39 = 51,
206 TARGET_SIGNAL_REALTIME_40 = 52,
207 TARGET_SIGNAL_REALTIME_41 = 53,
208 TARGET_SIGNAL_REALTIME_42 = 54,
209 TARGET_SIGNAL_REALTIME_43 = 55,
210 TARGET_SIGNAL_REALTIME_44 = 56,
211 TARGET_SIGNAL_REALTIME_45 = 57,
212 TARGET_SIGNAL_REALTIME_46 = 58,
213 TARGET_SIGNAL_REALTIME_47 = 59,
214 TARGET_SIGNAL_REALTIME_48 = 60,
215 TARGET_SIGNAL_REALTIME_49 = 61,
216 TARGET_SIGNAL_REALTIME_50 = 62,
217 TARGET_SIGNAL_REALTIME_51 = 63,
218 TARGET_SIGNAL_REALTIME_52 = 64,
219 TARGET_SIGNAL_REALTIME_53 = 65,
220 TARGET_SIGNAL_REALTIME_54 = 66,
221 TARGET_SIGNAL_REALTIME_55 = 67,
222 TARGET_SIGNAL_REALTIME_56 = 68,
223 TARGET_SIGNAL_REALTIME_57 = 69,
224 TARGET_SIGNAL_REALTIME_58 = 70,
225 TARGET_SIGNAL_REALTIME_59 = 71,
226 TARGET_SIGNAL_REALTIME_60 = 72,
227 TARGET_SIGNAL_REALTIME_61 = 73,
228 TARGET_SIGNAL_REALTIME_62 = 74,
229 TARGET_SIGNAL_REALTIME_63 = 75,
231 /* Used internally by Solaris threads. See signal(5) on Solaris. */
232 TARGET_SIGNAL_CANCEL = 76,
234 /* Yes, this pains me, too. But LynxOS didn't have SIG32, and now
235 Linux does, and we can't disturb the numbering, since it's part
236 of the protocol. Note that in some GDB's TARGET_SIGNAL_REALTIME_32
238 TARGET_SIGNAL_REALTIME_32,
240 #if defined(MACH) || defined(__MACH__)
241 /* Mach exceptions */
242 TARGET_EXC_BAD_ACCESS,
243 TARGET_EXC_BAD_INSTRUCTION,
244 TARGET_EXC_ARITHMETIC,
245 TARGET_EXC_EMULATION,
247 TARGET_EXC_BREAKPOINT,
251 /* Some signal we don't know about. */
252 TARGET_SIGNAL_UNKNOWN,
254 /* Use whatever signal we use when one is not specifically specified
255 (for passing to proceed and so on). */
256 TARGET_SIGNAL_DEFAULT,
258 /* Last and unused enum value, for sizing arrays, etc. */
262 struct target_waitstatus
264 enum target_waitkind kind;
266 /* Forked child pid, execd pathname, exit status or signal number. */
270 enum target_signal sig;
272 char *execd_pathname;
278 /* Possible types of events that the inferior handler will have to
280 enum inferior_event_type
282 /* There is a request to quit the inferior, abandon it. */
284 /* Process a normal inferior event which will result in target_wait
287 /* Deal with an error on the inferior. */
289 /* We are called because a timer went off. */
291 /* We are called to do stuff after the inferior stops. */
293 /* We are called to do some stuff after the inferior stops, but we
294 are expected to reenter the proceed() and
295 handle_inferior_event() functions. This is used only in case of
296 'step n' like commands. */
300 /* Return the string for a signal. */
301 extern char *target_signal_to_string PARAMS ((enum target_signal));
303 /* Return the name (SIGHUP, etc.) for a signal. */
304 extern char *target_signal_to_name PARAMS ((enum target_signal));
306 /* Given a name (SIGHUP, etc.), return its signal. */
307 enum target_signal target_signal_from_name PARAMS ((char *));
310 /* If certain kinds of activity happen, target_wait should perform
312 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
313 on TARGET_ACTIVITY_FD. */
314 extern int target_activity_fd;
315 /* Returns zero to leave the inferior alone, one to interrupt it. */
316 extern int (*target_activity_function) PARAMS ((void));
320 char *to_shortname; /* Name this target type */
321 char *to_longname; /* Name for printing */
322 char *to_doc; /* Documentation. Does not include trailing
323 newline, and starts with a one-line descrip-
324 tion (probably similar to to_longname). */
325 void (*to_open) PARAMS ((char *, int));
326 void (*to_close) PARAMS ((int));
327 void (*to_attach) PARAMS ((char *, int));
328 void (*to_post_attach) PARAMS ((int));
329 void (*to_require_attach) PARAMS ((char *, int));
330 void (*to_detach) PARAMS ((char *, int));
331 void (*to_require_detach) PARAMS ((int, char *, int));
332 void (*to_resume) PARAMS ((int, int, enum target_signal));
333 int (*to_wait) PARAMS ((int, struct target_waitstatus *));
334 void (*to_post_wait) PARAMS ((int, int));
335 void (*to_fetch_registers) PARAMS ((int));
336 void (*to_store_registers) PARAMS ((int));
337 void (*to_prepare_to_store) PARAMS ((void));
339 /* Transfer LEN bytes of memory between GDB address MYADDR and
340 target address MEMADDR. If WRITE, transfer them to the target, else
341 transfer them from the target. TARGET is the target from which we
344 Return value, N, is one of the following:
346 0 means that we can't handle this. If errno has been set, it is the
347 error which prevented us from doing it (FIXME: What about bfd_error?).
349 positive (call it N) means that we have transferred N bytes
350 starting at MEMADDR. We might be able to handle more bytes
351 beyond this length, but no promises.
353 negative (call its absolute value N) means that we cannot
354 transfer right at MEMADDR, but we could transfer at least
355 something at MEMADDR + N. */
357 int (*to_xfer_memory) PARAMS ((CORE_ADDR memaddr, char *myaddr,
359 struct target_ops * target));
362 /* Enable this after 4.12. */
364 /* Search target memory. Start at STARTADDR and take LEN bytes of
365 target memory, and them with MASK, and compare to DATA. If they
366 match, set *ADDR_FOUND to the address we found it at, store the data
367 we found at LEN bytes starting at DATA_FOUND, and return. If
368 not, add INCREMENT to the search address and keep trying until
369 the search address is outside of the range [LORANGE,HIRANGE).
371 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return. */
372 void (*to_search) PARAMS ((int len, char *data, char *mask,
373 CORE_ADDR startaddr, int increment,
374 CORE_ADDR lorange, CORE_ADDR hirange,
375 CORE_ADDR * addr_found, char *data_found));
377 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
378 (*current_target.to_search) (len, data, mask, startaddr, increment, \
379 lorange, hirange, addr_found, data_found)
382 void (*to_files_info) PARAMS ((struct target_ops *));
383 int (*to_insert_breakpoint) PARAMS ((CORE_ADDR, char *));
384 int (*to_remove_breakpoint) PARAMS ((CORE_ADDR, char *));
385 void (*to_terminal_init) PARAMS ((void));
386 void (*to_terminal_inferior) PARAMS ((void));
387 void (*to_terminal_ours_for_output) PARAMS ((void));
388 void (*to_terminal_ours) PARAMS ((void));
389 void (*to_terminal_info) PARAMS ((char *, int));
390 void (*to_kill) PARAMS ((void));
391 void (*to_load) PARAMS ((char *, int));
392 int (*to_lookup_symbol) PARAMS ((char *, CORE_ADDR *));
393 void (*to_create_inferior) PARAMS ((char *, char *, char **));
394 void (*to_post_startup_inferior) PARAMS ((int));
395 void (*to_acknowledge_created_inferior) PARAMS ((int));
396 void (*to_clone_and_follow_inferior) PARAMS ((int, int *));
397 void (*to_post_follow_inferior_by_clone) PARAMS ((void));
398 int (*to_insert_fork_catchpoint) PARAMS ((int));
399 int (*to_remove_fork_catchpoint) PARAMS ((int));
400 int (*to_insert_vfork_catchpoint) PARAMS ((int));
401 int (*to_remove_vfork_catchpoint) PARAMS ((int));
402 int (*to_has_forked) PARAMS ((int, int *));
403 int (*to_has_vforked) PARAMS ((int, int *));
404 int (*to_can_follow_vfork_prior_to_exec) PARAMS ((void));
405 void (*to_post_follow_vfork) PARAMS ((int, int, int, int));
406 int (*to_insert_exec_catchpoint) PARAMS ((int));
407 int (*to_remove_exec_catchpoint) PARAMS ((int));
408 int (*to_has_execd) PARAMS ((int, char **));
409 int (*to_reported_exec_events_per_exec_call) PARAMS ((void));
410 int (*to_has_syscall_event) PARAMS ((int, enum target_waitkind *, int *));
411 int (*to_has_exited) PARAMS ((int, int, int *));
412 void (*to_mourn_inferior) PARAMS ((void));
413 int (*to_can_run) PARAMS ((void));
414 void (*to_notice_signals) PARAMS ((int pid));
415 int (*to_thread_alive) PARAMS ((int pid));
416 void (*to_find_new_threads) PARAMS ((void));
417 char *(*to_pid_to_str) PARAMS ((int));
418 void (*to_stop) PARAMS ((void));
419 int (*to_query) PARAMS ((int /*char */ , char *, char *, int *));
420 void (*to_rcmd) (char *command, struct gdb_file *output);
421 struct symtab_and_line *(*to_enable_exception_callback) PARAMS ((enum exception_event_kind, int));
422 struct exception_event_record *(*to_get_current_exception_event) PARAMS ((void));
423 char *(*to_pid_to_exec_file) PARAMS ((int pid));
424 char *(*to_core_file_to_sym_file) PARAMS ((char *));
425 enum strata to_stratum;
427 *DONT_USE; /* formerly to_next */
428 int to_has_all_memory;
431 int to_has_registers;
432 int to_has_execution;
433 int to_has_thread_control; /* control thread execution */
438 /* ASYNC target controls */
439 int (*to_can_async_p) (void);
440 int (*to_is_async_p) (void);
441 void (*to_async) (void (*cb) (enum inferior_event_type, void *context), void *context);
442 int to_async_mask_value;
444 /* Need sub-structure for target machine related rather than comm related? */
447 /* Magic number for checking ops size. If a struct doesn't end with this
448 number, somebody changed the declaration but didn't change all the
449 places that initialize one. */
451 #define OPS_MAGIC 3840
453 /* The ops structure for our "current" target process. This should
454 never be NULL. If there is no target, it points to the dummy_target. */
456 extern struct target_ops current_target;
458 /* An item on the target stack. */
460 struct target_stack_item
462 struct target_stack_item *next;
463 struct target_ops *target_ops;
466 /* The target stack. */
468 extern struct target_stack_item *target_stack;
470 /* Define easy words for doing these operations on our current target. */
472 #define target_shortname (current_target.to_shortname)
473 #define target_longname (current_target.to_longname)
475 /* The open routine takes the rest of the parameters from the command,
476 and (if successful) pushes a new target onto the stack.
477 Targets should supply this routine, if only to provide an error message. */
478 #define target_open(name, from_tty) \
479 (*current_target.to_open) (name, from_tty)
481 /* Does whatever cleanup is required for a target that we are no longer
482 going to be calling. Argument says whether we are quitting gdb and
483 should not get hung in case of errors, or whether we want a clean
484 termination even if it takes a while. This routine is automatically
485 always called just before a routine is popped off the target stack.
486 Closing file descriptors and freeing memory are typical things it should
489 #define target_close(quitting) \
490 (*current_target.to_close) (quitting)
492 /* Attaches to a process on the target side. Arguments are as passed
493 to the `attach' command by the user. This routine can be called
494 when the target is not on the target-stack, if the target_can_run
495 routine returns 1; in that case, it must push itself onto the stack.
496 Upon exit, the target should be ready for normal operations, and
497 should be ready to deliver the status of the process immediately
498 (without waiting) to an upcoming target_wait call. */
500 #define target_attach(args, from_tty) \
501 (*current_target.to_attach) (args, from_tty)
503 /* The target_attach operation places a process under debugger control,
504 and stops the process.
506 This operation provides a target-specific hook that allows the
507 necessary bookkeeping to be performed after an attach completes.
509 #define target_post_attach(pid) \
510 (*current_target.to_post_attach) (pid)
512 /* Attaches to a process on the target side, if not already attached.
513 (If already attached, takes no action.)
515 This operation can be used to follow the child process of a fork.
516 On some targets, such child processes of an original inferior process
517 are automatically under debugger control, and thus do not require an
518 actual attach operation. */
520 #define target_require_attach(args, from_tty) \
521 (*current_target.to_require_attach) (args, from_tty)
523 /* Takes a program previously attached to and detaches it.
524 The program may resume execution (some targets do, some don't) and will
525 no longer stop on signals, etc. We better not have left any breakpoints
526 in the program or it'll die when it hits one. ARGS is arguments
527 typed by the user (e.g. a signal to send the process). FROM_TTY
528 says whether to be verbose or not. */
531 target_detach PARAMS ((char *, int));
533 /* Detaches from a process on the target side, if not already dettached.
534 (If already detached, takes no action.)
536 This operation can be used to follow the parent process of a fork.
537 On some targets, such child processes of an original inferior process
538 are automatically under debugger control, and thus do require an actual
541 PID is the process id of the child to detach from.
542 ARGS is arguments typed by the user (e.g. a signal to send the process).
543 FROM_TTY says whether to be verbose or not. */
545 #define target_require_detach(pid, args, from_tty) \
546 (*current_target.to_require_detach) (pid, args, from_tty)
548 /* Resume execution of the target process PID. STEP says whether to
549 single-step or to run free; SIGGNAL is the signal to be given to
550 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
551 pass TARGET_SIGNAL_DEFAULT. */
553 #define target_resume(pid, step, siggnal) \
554 (*current_target.to_resume) (pid, step, siggnal)
556 /* Wait for process pid to do something. Pid = -1 to wait for any pid
557 to do something. Return pid of child, or -1 in case of error;
558 store status through argument pointer STATUS. Note that it is
559 *not* OK to return_to_top_level out of target_wait without popping
560 the debugging target from the stack; GDB isn't prepared to get back
561 to the prompt with a debugging target but without the frame cache,
562 stop_pc, etc., set up. */
564 #define target_wait(pid, status) \
565 (*current_target.to_wait) (pid, status)
567 /* The target_wait operation waits for a process event to occur, and
568 thereby stop the process.
570 On some targets, certain events may happen in sequences. gdb's
571 correct response to any single event of such a sequence may require
572 knowledge of what earlier events in the sequence have been seen.
574 This operation provides a target-specific hook that allows the
575 necessary bookkeeping to be performed to track such sequences.
578 #define target_post_wait(pid, status) \
579 (*current_target.to_post_wait) (pid, status)
581 /* Fetch register REGNO, or all regs if regno == -1. No result. */
583 #define target_fetch_registers(regno) \
584 (*current_target.to_fetch_registers) (regno)
586 /* Store at least register REGNO, or all regs if REGNO == -1.
587 It can store as many registers as it wants to, so target_prepare_to_store
588 must have been previously called. Calls error() if there are problems. */
590 #define target_store_registers(regs) \
591 (*current_target.to_store_registers) (regs)
593 /* Get ready to modify the registers array. On machines which store
594 individual registers, this doesn't need to do anything. On machines
595 which store all the registers in one fell swoop, this makes sure
596 that REGISTERS contains all the registers from the program being
599 #define target_prepare_to_store() \
600 (*current_target.to_prepare_to_store) ()
603 target_read_string PARAMS ((CORE_ADDR, char **, int, int *));
606 target_read_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len));
609 target_read_memory_section PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
610 asection * bfd_section));
613 target_write_memory PARAMS ((CORE_ADDR, char *, int));
616 xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
619 child_xfer_memory PARAMS ((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);
634 child_pid_to_exec_file PARAMS ((int));
637 child_core_file_to_sym_file PARAMS ((char *));
639 #if defined(CHILD_POST_ATTACH)
641 child_post_attach PARAMS ((int));
645 child_post_wait PARAMS ((int, int));
648 child_post_startup_inferior PARAMS ((int));
651 child_acknowledge_created_inferior PARAMS ((int));
654 child_clone_and_follow_inferior PARAMS ((int, int *));
657 child_post_follow_inferior_by_clone PARAMS ((void));
660 child_insert_fork_catchpoint PARAMS ((int));
663 child_remove_fork_catchpoint PARAMS ((int));
666 child_insert_vfork_catchpoint PARAMS ((int));
669 child_remove_vfork_catchpoint PARAMS ((int));
672 child_has_forked PARAMS ((int, int *));
675 child_has_vforked PARAMS ((int, int *));
678 child_acknowledge_created_inferior PARAMS ((int));
681 child_can_follow_vfork_prior_to_exec PARAMS ((void));
684 child_post_follow_vfork PARAMS ((int, int, int, int));
687 child_insert_exec_catchpoint PARAMS ((int));
690 child_remove_exec_catchpoint PARAMS ((int));
693 child_has_execd PARAMS ((int, char **));
696 child_reported_exec_events_per_exec_call PARAMS ((void));
699 child_has_syscall_event PARAMS ((int, enum target_waitkind *, int *));
702 child_has_exited PARAMS ((int, int, int *));
705 child_thread_alive PARAMS ((int));
710 print_section_info PARAMS ((struct target_ops *, bfd *));
712 /* Print a line about the current target. */
714 #define target_files_info() \
715 (*current_target.to_files_info) (¤t_target)
717 /* Insert a breakpoint at address ADDR in the target machine.
718 SAVE is a pointer to memory allocated for saving the
719 target contents. It is guaranteed by the caller to be long enough
720 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
723 #define target_insert_breakpoint(addr, save) \
724 (*current_target.to_insert_breakpoint) (addr, save)
726 /* Remove a breakpoint at address ADDR in the target machine.
727 SAVE is a pointer to the same save area
728 that was previously passed to target_insert_breakpoint.
729 Result is 0 for success, or an errno value. */
731 #define target_remove_breakpoint(addr, save) \
732 (*current_target.to_remove_breakpoint) (addr, save)
734 /* Initialize the terminal settings we record for the inferior,
735 before we actually run the inferior. */
737 #define target_terminal_init() \
738 (*current_target.to_terminal_init) ()
740 /* Put the inferior's terminal settings into effect.
741 This is preparation for starting or resuming the inferior. */
743 #define target_terminal_inferior() \
744 (*current_target.to_terminal_inferior) ()
746 /* Put some of our terminal settings into effect,
747 enough to get proper results from our output,
748 but do not change into or out of RAW mode
749 so that no input is discarded.
751 After doing this, either terminal_ours or terminal_inferior
752 should be called to get back to a normal state of affairs. */
754 #define target_terminal_ours_for_output() \
755 (*current_target.to_terminal_ours_for_output) ()
757 /* Put our terminal settings into effect.
758 First record the inferior's terminal settings
759 so they can be restored properly later. */
761 #define target_terminal_ours() \
762 (*current_target.to_terminal_ours) ()
764 /* Print useful information about our terminal status, if such a thing
767 #define target_terminal_info(arg, from_tty) \
768 (*current_target.to_terminal_info) (arg, from_tty)
770 /* Kill the inferior process. Make it go away. */
772 #define target_kill() \
773 (*current_target.to_kill) ()
775 /* Load an executable file into the target process. This is expected to
776 not only bring new code into the target process, but also to update
777 GDB's symbol tables to match. */
779 extern void target_load (char *arg, int from_tty);
781 /* Look up a symbol in the target's symbol table. NAME is the symbol
782 name. ADDRP is a CORE_ADDR * pointing to where the value of the symbol
783 should be returned. The result is 0 if successful, nonzero if the
784 symbol does not exist in the target environment. This function should
785 not call error() if communication with the target is interrupted, since
786 it is called from symbol reading, but should return nonzero, possibly
787 doing a complain(). */
789 #define target_lookup_symbol(name, addrp) \
790 (*current_target.to_lookup_symbol) (name, addrp)
792 /* Start an inferior process and set inferior_pid to its pid.
793 EXEC_FILE is the file to run.
794 ALLARGS is a string containing the arguments to the program.
795 ENV is the environment vector to pass. Errors reported with error().
796 On VxWorks and various standalone systems, we ignore exec_file. */
798 #define target_create_inferior(exec_file, args, env) \
799 (*current_target.to_create_inferior) (exec_file, args, env)
802 /* Some targets (such as ttrace-based HPUX) don't allow us to request
803 notification of inferior events such as fork and vork immediately
804 after the inferior is created. (This because of how gdb gets an
805 inferior created via invoking a shell to do it. In such a scenario,
806 if the shell init file has commands in it, the shell will fork and
807 exec for each of those commands, and we will see each such fork
810 Such targets will supply an appropriate definition for this function.
812 #define target_post_startup_inferior(pid) \
813 (*current_target.to_post_startup_inferior) (pid)
815 /* On some targets, the sequence of starting up an inferior requires
816 some synchronization between gdb and the new inferior process, PID.
818 #define target_acknowledge_created_inferior(pid) \
819 (*current_target.to_acknowledge_created_inferior) (pid)
821 /* An inferior process has been created via a fork() or similar
822 system call. This function will clone the debugger, then ensure
823 that CHILD_PID is attached to by that debugger.
825 FOLLOWED_CHILD is set TRUE on return *for the clone debugger only*,
826 and FALSE otherwise. (The original and clone debuggers can use this
827 to determine which they are, if need be.)
829 (This is not a terribly useful feature without a GUI to prevent
830 the two debuggers from competing for shell input.)
832 #define target_clone_and_follow_inferior(child_pid,followed_child) \
833 (*current_target.to_clone_and_follow_inferior) (child_pid, followed_child)
835 /* This operation is intended to be used as the last in a sequence of
836 steps taken when following both parent and child of a fork. This
837 is used by a clone of the debugger, which will follow the child.
839 The original debugger has detached from this process, and the
840 clone has attached to it.
842 On some targets, this requires a bit of cleanup to make it work
845 #define target_post_follow_inferior_by_clone() \
846 (*current_target.to_post_follow_inferior_by_clone) ()
848 /* On some targets, we can catch an inferior fork or vfork event when it
849 occurs. These functions insert/remove an already-created catchpoint for
852 #define target_insert_fork_catchpoint(pid) \
853 (*current_target.to_insert_fork_catchpoint) (pid)
855 #define target_remove_fork_catchpoint(pid) \
856 (*current_target.to_remove_fork_catchpoint) (pid)
858 #define target_insert_vfork_catchpoint(pid) \
859 (*current_target.to_insert_vfork_catchpoint) (pid)
861 #define target_remove_vfork_catchpoint(pid) \
862 (*current_target.to_remove_vfork_catchpoint) (pid)
864 /* Returns TRUE if PID has invoked the fork() system call. And,
865 also sets CHILD_PID to the process id of the other ("child")
866 inferior process that was created by that call.
868 #define target_has_forked(pid,child_pid) \
869 (*current_target.to_has_forked) (pid,child_pid)
871 /* Returns TRUE if PID has invoked the vfork() system call. And,
872 also sets CHILD_PID to the process id of the other ("child")
873 inferior process that was created by that call.
875 #define target_has_vforked(pid,child_pid) \
876 (*current_target.to_has_vforked) (pid,child_pid)
878 /* Some platforms (such as pre-10.20 HP-UX) don't allow us to do
879 anything to a vforked child before it subsequently calls exec().
880 On such platforms, we say that the debugger cannot "follow" the
881 child until it has vforked.
883 This function should be defined to return 1 by those targets
884 which can allow the debugger to immediately follow a vforked
885 child, and 0 if they cannot.
887 #define target_can_follow_vfork_prior_to_exec() \
888 (*current_target.to_can_follow_vfork_prior_to_exec) ()
890 /* An inferior process has been created via a vfork() system call.
891 The debugger has followed the parent, the child, or both. The
892 process of setting up for that follow may have required some
893 target-specific trickery to track the sequence of reported events.
894 If so, this function should be defined by those targets that
895 require the debugger to perform cleanup or initialization after
898 #define target_post_follow_vfork(parent_pid,followed_parent,child_pid,followed_child) \
899 (*current_target.to_post_follow_vfork) (parent_pid,followed_parent,child_pid,followed_child)
901 /* On some targets, we can catch an inferior exec event when it
902 occurs. These functions insert/remove an already-created catchpoint
905 #define target_insert_exec_catchpoint(pid) \
906 (*current_target.to_insert_exec_catchpoint) (pid)
908 #define target_remove_exec_catchpoint(pid) \
909 (*current_target.to_remove_exec_catchpoint) (pid)
911 /* Returns TRUE if PID has invoked a flavor of the exec() system call.
912 And, also sets EXECD_PATHNAME to the pathname of the executable file
913 that was passed to exec(), and is now being executed.
915 #define target_has_execd(pid,execd_pathname) \
916 (*current_target.to_has_execd) (pid,execd_pathname)
918 /* Returns the number of exec events that are reported when a process
919 invokes a flavor of the exec() system call on this target, if exec
920 events are being reported.
922 #define target_reported_exec_events_per_exec_call() \
923 (*current_target.to_reported_exec_events_per_exec_call) ()
925 /* Returns TRUE if PID has reported a syscall event. And, also sets
926 KIND to the appropriate TARGET_WAITKIND_, and sets SYSCALL_ID to
927 the unique integer ID of the syscall.
929 #define target_has_syscall_event(pid,kind,syscall_id) \
930 (*current_target.to_has_syscall_event) (pid,kind,syscall_id)
932 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
933 exit code of PID, if any.
935 #define target_has_exited(pid,wait_status,exit_status) \
936 (*current_target.to_has_exited) (pid,wait_status,exit_status)
938 /* The debugger has completed a blocking wait() call. There is now
939 some process event that must be processed. This function should
940 be defined by those targets that require the debugger to perform
941 cleanup or internal state changes in response to the process event.
944 /* The inferior process has died. Do what is right. */
946 #define target_mourn_inferior() \
947 (*current_target.to_mourn_inferior) ()
949 /* Does target have enough data to do a run or attach command? */
951 #define target_can_run(t) \
954 /* post process changes to signal handling in the inferior. */
956 #define target_notice_signals(pid) \
957 (*current_target.to_notice_signals) (pid)
959 /* Check to see if a thread is still alive. */
961 #define target_thread_alive(pid) \
962 (*current_target.to_thread_alive) (pid)
964 /* Query for new threads and add them to the thread list. */
966 #define target_find_new_threads() \
968 if (current_target.to_find_new_threads) \
969 (*current_target.to_find_new_threads) (); \
972 /* Make target stop in a continuable fashion. (For instance, under Unix, this
973 should act like SIGSTOP). This function is normally used by GUIs to
974 implement a stop button. */
976 #define target_stop current_target.to_stop
978 /* Queries the target side for some information. The first argument is a
979 letter specifying the type of the query, which is used to determine who
980 should process it. The second argument is a string that specifies which
981 information is desired and the third is a buffer that carries back the
982 response from the target side. The fourth parameter is the size of the
983 output buffer supplied. */
985 #define target_query(query_type, query, resp_buffer, bufffer_size) \
986 (*current_target.to_query) (query_type, query, resp_buffer, bufffer_size)
988 /* Send the specified COMMAND to the target's monitor
989 (shell,interpreter) for execution. The result of the query is
992 #define target_rcmd(command, outbuf) \
993 (*current_target.to_rcmd) (command, outbuf)
996 /* Get the symbol information for a breakpointable routine called when
997 an exception event occurs.
998 Intended mainly for C++, and for those
999 platforms/implementations where such a callback mechanism is available,
1000 e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support
1001 different mechanisms for debugging exceptions. */
1003 #define target_enable_exception_callback(kind, enable) \
1004 (*current_target.to_enable_exception_callback) (kind, enable)
1006 /* Get the current exception event kind -- throw or catch, etc. */
1008 #define target_get_current_exception_event() \
1009 (*current_target.to_get_current_exception_event) ()
1011 /* Pointer to next target in the chain, e.g. a core file and an exec file. */
1013 #define target_next \
1014 (current_target.to_next)
1016 /* Does the target include all of memory, or only part of it? This
1017 determines whether we look up the target chain for other parts of
1018 memory if this target can't satisfy a request. */
1020 #define target_has_all_memory \
1021 (current_target.to_has_all_memory)
1023 /* Does the target include memory? (Dummy targets don't.) */
1025 #define target_has_memory \
1026 (current_target.to_has_memory)
1028 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1029 we start a process.) */
1031 #define target_has_stack \
1032 (current_target.to_has_stack)
1034 /* Does the target have registers? (Exec files don't.) */
1036 #define target_has_registers \
1037 (current_target.to_has_registers)
1039 /* Does the target have execution? Can we make it jump (through
1040 hoops), or pop its stack a few times? FIXME: If this is to work that
1041 way, it needs to check whether an inferior actually exists.
1042 remote-udi.c and probably other targets can be the current target
1043 when the inferior doesn't actually exist at the moment. Right now
1044 this just tells us whether this target is *capable* of execution. */
1046 #define target_has_execution \
1047 (current_target.to_has_execution)
1049 /* Can the target support the debugger control of thread execution?
1050 a) Can it lock the thread scheduler?
1051 b) Can it switch the currently running thread? */
1053 #define target_can_lock_scheduler \
1054 (current_target.to_has_thread_control & tc_schedlock)
1056 #define target_can_switch_threads \
1057 (current_target.to_has_thread_control & tc_switch)
1059 /* Can the target support asynchronous execution? */
1060 #define target_can_async_p() (current_target.to_can_async_p ())
1062 /* Is the target in asynchronous execution mode? */
1063 #define target_is_async_p() (current_target.to_is_async_p())
1065 /* Put the target in async mode with the specified callback function. */
1066 #define target_async(CALLBACK,CONTEXT) (current_target.to_async((CALLBACK), (CONTEXT)))
1068 /* This is to be used ONLY within run_stack_dummy(). It
1069 provides a workaround, to have inferior function calls done in
1070 sychronous mode, even though the target is asynchronous. After
1071 target_async_mask(0) is called, calls to target_can_async_p() will
1072 return FALSE , so that target_resume() will not try to start the
1073 target asynchronously. After the inferior stops, we IMMEDIATELY
1074 restore the previous nature of the target, by calling
1075 target_async_mask(1). After that, target_can_async_p() will return
1076 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1078 FIXME ezannoni 1999-12-13: we won't need this once we move
1079 the turning async on and off to the single execution commands,
1080 from where it is done currently, in remote_resume().*/
1082 #define target_async_mask_value \
1083 (current_target.to_async_mask_value)
1085 extern int target_async_mask (int mask);
1087 extern void target_link PARAMS ((char *, CORE_ADDR *));
1089 /* Converts a process id to a string. Usually, the string just contains
1090 `process xyz', but on some systems it may contain
1091 `process xyz thread abc'. */
1093 #undef target_pid_to_str
1094 #define target_pid_to_str(PID) current_target.to_pid_to_str (PID)
1096 #ifndef target_tid_to_str
1097 #define target_tid_to_str(PID) \
1098 target_pid_to_str (PID)
1099 extern char *normal_pid_to_str PARAMS ((int pid));
1104 * New Objfile Event Hook:
1106 * Sometimes a GDB component wants to get notified whenever a new
1107 * objfile is loaded. Mainly this is used by thread-debugging
1108 * implementations that need to know when symbols for the target
1109 * thread implemenation are available.
1111 * The old way of doing this is to define a macro 'target_new_objfile'
1112 * that points to the function that you want to be called on every
1113 * objfile/shlib load.
1115 * The new way is to grab the function pointer, 'target_new_objfile_hook',
1116 * and point it to the function that you want to be called on every
1117 * objfile/shlib load.
1119 * If multiple clients are willing to be cooperative, they can each
1120 * save a pointer to the previous value of target_new_objfile_hook
1121 * before modifying it, and arrange for their function to call the
1122 * previous function in the chain. In that way, multiple clients
1123 * can receive this notification (something like with signal handlers).
1126 extern void (*target_new_objfile_hook) PARAMS ((struct objfile *));
1128 #ifndef target_pid_or_tid_to_str
1129 #define target_pid_or_tid_to_str(ID) \
1130 target_pid_to_str (ID)
1133 /* Attempts to find the pathname of the executable file
1134 that was run to create a specified process.
1136 The process PID must be stopped when this operation is used.
1138 If the executable file cannot be determined, NULL is returned.
1140 Else, a pointer to a character string containing the pathname
1141 is returned. This string should be copied into a buffer by
1142 the client if the string will not be immediately used, or if
1146 #define target_pid_to_exec_file(pid) \
1147 (current_target.to_pid_to_exec_file) (pid)
1149 /* Hook to call target-dependant code after reading in a new symbol table. */
1151 #ifndef TARGET_SYMFILE_POSTREAD
1152 #define TARGET_SYMFILE_POSTREAD(OBJFILE)
1155 /* Hook to call target dependant code just after inferior target process has
1158 #ifndef TARGET_CREATE_INFERIOR_HOOK
1159 #define TARGET_CREATE_INFERIOR_HOOK(PID)
1162 /* Hardware watchpoint interfaces. */
1164 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1167 #ifndef STOPPED_BY_WATCHPOINT
1168 #define STOPPED_BY_WATCHPOINT(w) 0
1171 /* HP-UX supplies these operations, which respectively disable and enable
1172 the memory page-protections that are used to implement hardware watchpoints
1173 on that platform. See wait_for_inferior's use of these.
1175 #if !defined(TARGET_DISABLE_HW_WATCHPOINTS)
1176 #define TARGET_DISABLE_HW_WATCHPOINTS(pid)
1179 #if !defined(TARGET_ENABLE_HW_WATCHPOINTS)
1180 #define TARGET_ENABLE_HW_WATCHPOINTS(pid)
1183 /* Provide defaults for systems that don't support hardware watchpoints. */
1185 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
1187 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1188 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1189 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1190 (including this one?). OTHERTYPE is who knows what... */
1192 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
1194 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
1195 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
1196 (LONGEST)(byte_count) <= REGISTER_SIZE
1199 /* However, some addresses may not be profitable to use hardware to watch,
1200 or may be difficult to understand when the addressed object is out of
1201 scope, and hence should be unwatched. On some targets, this may have
1202 severe performance penalties, such that we might as well use regular
1203 watchpoints, and save (possibly precious) hardware watchpoints for other
1206 #if !defined(TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT)
1207 #define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) 0
1211 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1212 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1213 success, non-zero for failure. */
1215 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
1216 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
1218 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
1220 #ifndef target_insert_hw_breakpoint
1221 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
1222 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
1225 #ifndef target_stopped_data_address
1226 #define target_stopped_data_address() 0
1229 /* If defined, then we need to decr pc by this much after a hardware break-
1230 point. Presumably this overrides DECR_PC_AFTER_BREAK... */
1232 #ifndef DECR_PC_AFTER_HW_BREAK
1233 #define DECR_PC_AFTER_HW_BREAK 0
1236 /* Sometimes gdb may pick up what appears to be a valid target address
1237 from a minimal symbol, but the value really means, essentially,
1238 "This is an index into a table which is populated when the inferior
1239 is run. Therefore, do not attempt to use this as a PC."
1241 #if !defined(PC_REQUIRES_RUN_BEFORE_USE)
1242 #define PC_REQUIRES_RUN_BEFORE_USE(pc) (0)
1245 /* This will only be defined by a target that supports catching vfork events,
1248 On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked
1249 child process after it has exec'd, causes the parent process to resume as
1250 well. To prevent the parent from running spontaneously, such targets should
1251 define this to a function that prevents that from happening.
1253 #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED)
1254 #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0)
1257 /* This will only be defined by a target that supports catching vfork events,
1260 On some targets (such as HP-UX 10.20 and earlier), a newly vforked child
1261 process must be resumed when it delivers its exec event, before the parent
1262 vfork event will be delivered to us.
1264 #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK)
1265 #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0)
1268 /* Routines for maintenance of the target structures...
1270 add_target: Add a target to the list of all possible targets.
1272 push_target: Make this target the top of the stack of currently used
1273 targets, within its particular stratum of the stack. Result
1274 is 0 if now atop the stack, nonzero if not on top (maybe
1277 unpush_target: Remove this from the stack of currently used targets,
1278 no matter where it is on the list. Returns 0 if no
1279 change, 1 if removed from stack.
1281 pop_target: Remove the top thing on the stack of current targets. */
1284 add_target PARAMS ((struct target_ops *));
1287 push_target PARAMS ((struct target_ops *));
1290 unpush_target PARAMS ((struct target_ops *));
1293 target_preopen PARAMS ((int));
1296 pop_target PARAMS ((void));
1298 /* Struct section_table maps address ranges to file sections. It is
1299 mostly used with BFD files, but can be used without (e.g. for handling
1300 raw disks, or files not in formats handled by BFD). */
1302 struct section_table
1304 CORE_ADDR addr; /* Lowest address in section */
1305 CORE_ADDR endaddr; /* 1+highest address in section */
1307 sec_ptr the_bfd_section;
1309 bfd *bfd; /* BFD file pointer */
1312 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
1313 Returns 0 if OK, 1 on error. */
1316 build_section_table PARAMS ((bfd *, struct section_table **,
1317 struct section_table **));
1319 /* From mem-break.c */
1321 extern int memory_remove_breakpoint PARAMS ((CORE_ADDR, char *));
1323 extern int memory_insert_breakpoint PARAMS ((CORE_ADDR, char *));
1325 extern int default_memory_remove_breakpoint PARAMS ((CORE_ADDR, char *));
1327 extern int default_memory_insert_breakpoint PARAMS ((CORE_ADDR, char *));
1329 extern breakpoint_from_pc_fn memory_breakpoint_from_pc;
1330 #ifndef BREAKPOINT_FROM_PC
1331 #define BREAKPOINT_FROM_PC(pcptr, lenptr) memory_breakpoint_from_pc (pcptr, lenptr)
1338 initialize_targets PARAMS ((void));
1341 noprocess PARAMS ((void));
1344 find_default_attach PARAMS ((char *, int));
1347 find_default_require_attach PARAMS ((char *, int));
1350 find_default_require_detach PARAMS ((int, char *, int));
1353 find_default_create_inferior PARAMS ((char *, char *, char **));
1356 find_default_clone_and_follow_inferior PARAMS ((int, int *));
1358 extern struct target_ops *
1359 find_run_target PARAMS ((void));
1361 extern struct target_ops *
1362 find_core_target PARAMS ((void));
1364 extern struct target_ops *
1365 find_target_beneath PARAMS ((struct target_ops *));
1368 target_resize_to_sections PARAMS ((struct target_ops *target, int num_added));
1370 /* Stuff that should be shared among the various remote targets. */
1372 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1373 information (higher values, more information). */
1374 extern int remote_debug;
1376 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1377 extern int baud_rate;
1378 /* Timeout limit for response from target. */
1379 extern int remote_timeout;
1381 extern asection *target_memory_bfd_section;
1383 /* Functions for helping to write a native target. */
1385 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1386 extern void store_waitstatus PARAMS ((struct target_waitstatus *, int));
1388 /* Predicate to target_signal_to_host(). Return non-zero if the enum
1389 targ_signal SIGNO has an equivalent ``host'' representation. */
1390 /* FIXME: cagney/1999-11-22: The name below was chosen in preference
1391 to the shorter target_signal_p() because it is far less ambigious.
1392 In this context ``target_signal'' refers to GDB's internal
1393 representation of the target's set of signals while ``host signal''
1394 refers to the target operating system's signal. Confused? */
1395 extern int target_signal_to_host_p (enum target_signal signo);
1397 /* Convert between host signal numbers and enum target_signal's.
1398 target_signal_to_host() returns 0 and prints a warning() on GDB's
1399 console if SIGNO has no equivalent host representation. */
1400 /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is
1401 refering to the target operating system's signal numbering.
1402 Similarly, ``enum target_signal'' is named incorrectly, ``enum
1403 gdb_signal'' would probably be better as it is refering to GDB's
1404 internal representation of a target operating system's signal. */
1405 extern enum target_signal target_signal_from_host PARAMS ((int));
1406 extern int target_signal_to_host PARAMS ((enum target_signal));
1408 /* Convert from a number used in a GDB command to an enum target_signal. */
1409 extern enum target_signal target_signal_from_command PARAMS ((int));
1411 /* Any target can call this to switch to remote protocol (in remote.c). */
1412 extern void push_remote_target PARAMS ((char *name, int from_tty));
1414 /* Imported from machine dependent code */
1416 #ifndef SOFTWARE_SINGLE_STEP_P
1417 #define SOFTWARE_SINGLE_STEP_P 0
1418 #define SOFTWARE_SINGLE_STEP(sig,bp_p) (internal_error ("SOFTWARE_SINGLE_STEP"), 0)
1419 #endif /* SOFTWARE_SINGLE_STEP_P */
1421 /* Blank target vector entries are initialized to target_ignore. */
1422 void target_ignore PARAMS ((void));
1424 /* Macro for getting target's idea of a frame pointer.
1425 FIXME: GDB's whole scheme for dealing with "frames" and
1426 "frame pointers" needs a serious shakedown. */
1427 #ifndef TARGET_VIRTUAL_FRAME_POINTER
1428 #define TARGET_VIRTUAL_FRAME_POINTER(ADDR, REGP, OFFP) \
1429 do { *(REGP) = FP_REGNUM; *(OFFP) = 0; } while (0)
1430 #endif /* TARGET_VIRTUAL_FRAME_POINTER */
1432 #endif /* !defined (TARGET_H) */