1 /* Interface between GDB and target environments, including files and processes
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Cygnus Support. Written by John Gilmore.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #if !defined (TARGET_H)
26 /* This include file defines the interface between the main part
27 of the debugger, and the part which is target-specific, or
28 specific to the communications interface between us and the
31 A TARGET is an interface between the debugger and a particular
32 kind of file or process. Targets can be STACKED in STRATA,
33 so that more than one target can potentially respond to a request.
34 In particular, memory accesses will walk down the stack of targets
35 until they find a target that is interested in handling that particular
36 address. STRATA are artificial boundaries on the stack, within
37 which particular kinds of targets live. Strata exist so that
38 people don't get confused by pushing e.g. a process target and then
39 a file target, and wondering why they can't see the current values
40 of variables any more (the file target is handling them and they
41 never get to the process target). So when you push a file target,
42 it goes into the file stratum, which is always below the process
52 dummy_stratum
, /* The lowest of the low */
53 file_stratum
, /* Executable files, etc */
54 core_stratum
, /* Core dump files */
55 download_stratum
, /* Downloading of remote targets */
56 process_stratum
, /* Executing processes */
57 thread_stratum
/* Executing threads */
60 enum thread_control_capabilities
62 tc_none
= 0, /* Default: can't control thread execution. */
63 tc_schedlock
= 1, /* Can lock the thread scheduler. */
64 tc_switch
= 2 /* Can switch the running thread on demand. */
67 /* Stuff for target_wait. */
69 /* Generally, what has the program done? */
72 /* The program has exited. The exit status is in value.integer. */
73 TARGET_WAITKIND_EXITED
,
75 /* The program has stopped with a signal. Which signal is in
77 TARGET_WAITKIND_STOPPED
,
79 /* The program has terminated with a signal. Which signal is in
81 TARGET_WAITKIND_SIGNALLED
,
83 /* The program is letting us know that it dynamically loaded something
84 (e.g. it called load(2) on AIX). */
85 TARGET_WAITKIND_LOADED
,
87 /* The program has forked. A "related" process' ID is in
88 value.related_pid. I.e., if the child forks, value.related_pid
89 is the parent's ID. */
91 TARGET_WAITKIND_FORKED
,
93 /* The program has vforked. A "related" process's ID is in
96 TARGET_WAITKIND_VFORKED
,
98 /* The program has exec'ed a new executable file. The new file's
99 pathname is pointed to by value.execd_pathname. */
101 TARGET_WAITKIND_EXECD
,
103 /* The program has entered or returned from a system call. On
104 HP-UX, this is used in the hardware watchpoint implementation.
105 The syscall's unique integer ID number is in value.syscall_id */
107 TARGET_WAITKIND_SYSCALL_ENTRY
,
108 TARGET_WAITKIND_SYSCALL_RETURN
,
110 /* Nothing happened, but we stopped anyway. This perhaps should be handled
111 within target_wait, but I'm not sure target_wait should be resuming the
113 TARGET_WAITKIND_SPURIOUS
,
115 /* This is used for target async and extended-async
116 only. Remote_async_wait() returns this when there is an event
117 on the inferior, but the rest of the world is not interested in
118 it. The inferior has not stopped, but has just sent some output
119 to the console, for instance. In this case, we want to go back
120 to the event loop and wait there for another event from the
121 inferior, rather than being stuck in the remote_async_wait()
122 function. This way the event loop is responsive to other events,
123 like for instance the user typing. */
124 TARGET_WAITKIND_IGNORE
127 /* The numbering of these signals is chosen to match traditional unix
128 signals (insofar as various unices use the same numbers, anyway).
129 It is also the numbering of the GDB remote protocol. Other remote
130 protocols, if they use a different numbering, should make sure to
131 translate appropriately.
133 Since these numbers have actually made it out into other software
134 (stubs, etc.), you mustn't disturb the assigned numbering. If you
135 need to add new signals here, add them to the end of the explicitly
138 This is based strongly on Unix/POSIX signals for several reasons:
139 (1) This set of signals represents a widely-accepted attempt to
140 represent events of this sort in a portable fashion, (2) we want a
141 signal to make it from wait to child_wait to the user intact, (3) many
142 remote protocols use a similar encoding. However, it is
143 recognized that this set of signals has limitations (such as not
144 distinguishing between various kinds of SIGSEGV, or not
145 distinguishing hitting a breakpoint from finishing a single step).
146 So in the future we may get around this either by adding additional
147 signals for breakpoint, single-step, etc., or by adding signal
148 codes; the latter seems more in the spirit of what BSD, System V,
149 etc. are doing to address these issues. */
151 /* For an explanation of what each signal means, see
152 target_signal_to_string. */
156 /* Used some places (e.g. stop_signal) to record the concept that
157 there is no signal. */
159 TARGET_SIGNAL_FIRST
= 0,
160 TARGET_SIGNAL_HUP
= 1,
161 TARGET_SIGNAL_INT
= 2,
162 TARGET_SIGNAL_QUIT
= 3,
163 TARGET_SIGNAL_ILL
= 4,
164 TARGET_SIGNAL_TRAP
= 5,
165 TARGET_SIGNAL_ABRT
= 6,
166 TARGET_SIGNAL_EMT
= 7,
167 TARGET_SIGNAL_FPE
= 8,
168 TARGET_SIGNAL_KILL
= 9,
169 TARGET_SIGNAL_BUS
= 10,
170 TARGET_SIGNAL_SEGV
= 11,
171 TARGET_SIGNAL_SYS
= 12,
172 TARGET_SIGNAL_PIPE
= 13,
173 TARGET_SIGNAL_ALRM
= 14,
174 TARGET_SIGNAL_TERM
= 15,
175 TARGET_SIGNAL_URG
= 16,
176 TARGET_SIGNAL_STOP
= 17,
177 TARGET_SIGNAL_TSTP
= 18,
178 TARGET_SIGNAL_CONT
= 19,
179 TARGET_SIGNAL_CHLD
= 20,
180 TARGET_SIGNAL_TTIN
= 21,
181 TARGET_SIGNAL_TTOU
= 22,
182 TARGET_SIGNAL_IO
= 23,
183 TARGET_SIGNAL_XCPU
= 24,
184 TARGET_SIGNAL_XFSZ
= 25,
185 TARGET_SIGNAL_VTALRM
= 26,
186 TARGET_SIGNAL_PROF
= 27,
187 TARGET_SIGNAL_WINCH
= 28,
188 TARGET_SIGNAL_LOST
= 29,
189 TARGET_SIGNAL_USR1
= 30,
190 TARGET_SIGNAL_USR2
= 31,
191 TARGET_SIGNAL_PWR
= 32,
192 /* Similar to SIGIO. Perhaps they should have the same number. */
193 TARGET_SIGNAL_POLL
= 33,
194 TARGET_SIGNAL_WIND
= 34,
195 TARGET_SIGNAL_PHONE
= 35,
196 TARGET_SIGNAL_WAITING
= 36,
197 TARGET_SIGNAL_LWP
= 37,
198 TARGET_SIGNAL_DANGER
= 38,
199 TARGET_SIGNAL_GRANT
= 39,
200 TARGET_SIGNAL_RETRACT
= 40,
201 TARGET_SIGNAL_MSG
= 41,
202 TARGET_SIGNAL_SOUND
= 42,
203 TARGET_SIGNAL_SAK
= 43,
204 TARGET_SIGNAL_PRIO
= 44,
205 TARGET_SIGNAL_REALTIME_33
= 45,
206 TARGET_SIGNAL_REALTIME_34
= 46,
207 TARGET_SIGNAL_REALTIME_35
= 47,
208 TARGET_SIGNAL_REALTIME_36
= 48,
209 TARGET_SIGNAL_REALTIME_37
= 49,
210 TARGET_SIGNAL_REALTIME_38
= 50,
211 TARGET_SIGNAL_REALTIME_39
= 51,
212 TARGET_SIGNAL_REALTIME_40
= 52,
213 TARGET_SIGNAL_REALTIME_41
= 53,
214 TARGET_SIGNAL_REALTIME_42
= 54,
215 TARGET_SIGNAL_REALTIME_43
= 55,
216 TARGET_SIGNAL_REALTIME_44
= 56,
217 TARGET_SIGNAL_REALTIME_45
= 57,
218 TARGET_SIGNAL_REALTIME_46
= 58,
219 TARGET_SIGNAL_REALTIME_47
= 59,
220 TARGET_SIGNAL_REALTIME_48
= 60,
221 TARGET_SIGNAL_REALTIME_49
= 61,
222 TARGET_SIGNAL_REALTIME_50
= 62,
223 TARGET_SIGNAL_REALTIME_51
= 63,
224 TARGET_SIGNAL_REALTIME_52
= 64,
225 TARGET_SIGNAL_REALTIME_53
= 65,
226 TARGET_SIGNAL_REALTIME_54
= 66,
227 TARGET_SIGNAL_REALTIME_55
= 67,
228 TARGET_SIGNAL_REALTIME_56
= 68,
229 TARGET_SIGNAL_REALTIME_57
= 69,
230 TARGET_SIGNAL_REALTIME_58
= 70,
231 TARGET_SIGNAL_REALTIME_59
= 71,
232 TARGET_SIGNAL_REALTIME_60
= 72,
233 TARGET_SIGNAL_REALTIME_61
= 73,
234 TARGET_SIGNAL_REALTIME_62
= 74,
235 TARGET_SIGNAL_REALTIME_63
= 75,
237 /* Used internally by Solaris threads. See signal(5) on Solaris. */
238 TARGET_SIGNAL_CANCEL
= 76,
240 /* Yes, this pains me, too. But LynxOS didn't have SIG32, and now
241 Linux does, and we can't disturb the numbering, since it's part
242 of the protocol. Note that in some GDB's TARGET_SIGNAL_REALTIME_32
244 TARGET_SIGNAL_REALTIME_32
,
245 /* Yet another pain, IRIX 6 has SIG64. */
246 TARGET_SIGNAL_REALTIME_64
,
248 #if defined(MACH) || defined(__MACH__)
249 /* Mach exceptions */
250 TARGET_EXC_BAD_ACCESS
,
251 TARGET_EXC_BAD_INSTRUCTION
,
252 TARGET_EXC_ARITHMETIC
,
253 TARGET_EXC_EMULATION
,
255 TARGET_EXC_BREAKPOINT
,
259 /* Some signal we don't know about. */
260 TARGET_SIGNAL_UNKNOWN
,
262 /* Use whatever signal we use when one is not specifically specified
263 (for passing to proceed and so on). */
264 TARGET_SIGNAL_DEFAULT
,
266 /* Last and unused enum value, for sizing arrays, etc. */
270 struct target_waitstatus
272 enum target_waitkind kind
;
274 /* Forked child pid, execd pathname, exit status or signal number. */
278 enum target_signal sig
;
280 char *execd_pathname
;
286 /* Possible types of events that the inferior handler will have to
288 enum inferior_event_type
290 /* There is a request to quit the inferior, abandon it. */
292 /* Process a normal inferior event which will result in target_wait
295 /* Deal with an error on the inferior. */
297 /* We are called because a timer went off. */
299 /* We are called to do stuff after the inferior stops. */
301 /* We are called to do some stuff after the inferior stops, but we
302 are expected to reenter the proceed() and
303 handle_inferior_event() functions. This is used only in case of
304 'step n' like commands. */
308 /* Return the string for a signal. */
309 extern char *target_signal_to_string (enum target_signal
);
311 /* Return the name (SIGHUP, etc.) for a signal. */
312 extern char *target_signal_to_name (enum target_signal
);
314 /* Given a name (SIGHUP, etc.), return its signal. */
315 enum target_signal
target_signal_from_name (char *);
318 /* If certain kinds of activity happen, target_wait should perform
320 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
321 on TARGET_ACTIVITY_FD. */
322 extern int target_activity_fd
;
323 /* Returns zero to leave the inferior alone, one to interrupt it. */
324 extern int (*target_activity_function
) (void);
326 struct thread_info
; /* fwd decl for parameter list below: */
330 char *to_shortname
; /* Name this target type */
331 char *to_longname
; /* Name for printing */
332 char *to_doc
; /* Documentation. Does not include trailing
333 newline, and starts with a one-line descrip-
334 tion (probably similar to to_longname). */
335 void (*to_open
) (char *, int);
336 void (*to_close
) (int);
337 void (*to_attach
) (char *, int);
338 void (*to_post_attach
) (int);
339 void (*to_require_attach
) (char *, int);
340 void (*to_detach
) (char *, int);
341 void (*to_require_detach
) (int, char *, int);
342 void (*to_resume
) (int, int, enum target_signal
);
343 int (*to_wait
) (int, struct target_waitstatus
*);
344 void (*to_post_wait
) (int, int);
345 void (*to_fetch_registers
) (int);
346 void (*to_store_registers
) (int);
347 void (*to_prepare_to_store
) (void);
349 /* Transfer LEN bytes of memory between GDB address MYADDR and
350 target address MEMADDR. If WRITE, transfer them to the target, else
351 transfer them from the target. TARGET is the target from which we
354 Return value, N, is one of the following:
356 0 means that we can't handle this. If errno has been set, it is the
357 error which prevented us from doing it (FIXME: What about bfd_error?).
359 positive (call it N) means that we have transferred N bytes
360 starting at MEMADDR. We might be able to handle more bytes
361 beyond this length, but no promises.
363 negative (call its absolute value N) means that we cannot
364 transfer right at MEMADDR, but we could transfer at least
365 something at MEMADDR + N. */
367 int (*to_xfer_memory
) (CORE_ADDR memaddr
, char *myaddr
,
369 struct mem_attrib
*attrib
,
370 struct target_ops
*target
);
373 /* Enable this after 4.12. */
375 /* Search target memory. Start at STARTADDR and take LEN bytes of
376 target memory, and them with MASK, and compare to DATA. If they
377 match, set *ADDR_FOUND to the address we found it at, store the data
378 we found at LEN bytes starting at DATA_FOUND, and return. If
379 not, add INCREMENT to the search address and keep trying until
380 the search address is outside of the range [LORANGE,HIRANGE).
382 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and
385 void (*to_search
) (int len
, char *data
, char *mask
,
386 CORE_ADDR startaddr
, int increment
,
387 CORE_ADDR lorange
, CORE_ADDR hirange
,
388 CORE_ADDR
* addr_found
, char *data_found
);
390 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
391 (*current_target.to_search) (len, data, mask, startaddr, increment, \
392 lorange, hirange, addr_found, data_found)
395 void (*to_files_info
) (struct target_ops
*);
396 int (*to_insert_breakpoint
) (CORE_ADDR
, char *);
397 int (*to_remove_breakpoint
) (CORE_ADDR
, char *);
398 void (*to_terminal_init
) (void);
399 void (*to_terminal_inferior
) (void);
400 void (*to_terminal_ours_for_output
) (void);
401 void (*to_terminal_ours
) (void);
402 void (*to_terminal_info
) (char *, int);
403 void (*to_kill
) (void);
404 void (*to_load
) (char *, int);
405 int (*to_lookup_symbol
) (char *, CORE_ADDR
*);
406 void (*to_create_inferior
) (char *, char *, char **);
407 void (*to_post_startup_inferior
) (int);
408 void (*to_acknowledge_created_inferior
) (int);
409 void (*to_clone_and_follow_inferior
) (int, int *);
410 void (*to_post_follow_inferior_by_clone
) (void);
411 int (*to_insert_fork_catchpoint
) (int);
412 int (*to_remove_fork_catchpoint
) (int);
413 int (*to_insert_vfork_catchpoint
) (int);
414 int (*to_remove_vfork_catchpoint
) (int);
415 int (*to_has_forked
) (int, int *);
416 int (*to_has_vforked
) (int, int *);
417 int (*to_can_follow_vfork_prior_to_exec
) (void);
418 void (*to_post_follow_vfork
) (int, int, int, int);
419 int (*to_insert_exec_catchpoint
) (int);
420 int (*to_remove_exec_catchpoint
) (int);
421 int (*to_has_execd
) (int, char **);
422 int (*to_reported_exec_events_per_exec_call
) (void);
423 int (*to_has_syscall_event
) (int, enum target_waitkind
*, int *);
424 int (*to_has_exited
) (int, int, int *);
425 void (*to_mourn_inferior
) (void);
426 int (*to_can_run
) (void);
427 void (*to_notice_signals
) (int pid
);
428 int (*to_thread_alive
) (int pid
);
429 void (*to_find_new_threads
) (void);
430 char *(*to_pid_to_str
) (int);
431 char *(*to_extra_thread_info
) (struct thread_info
*);
432 void (*to_stop
) (void);
433 int (*to_query
) (int /*char */ , char *, char *, int *);
434 void (*to_rcmd
) (char *command
, struct ui_file
*output
);
435 struct symtab_and_line
*(*to_enable_exception_callback
) (enum
436 exception_event_kind
,
438 struct exception_event_record
*(*to_get_current_exception_event
) (void);
439 char *(*to_pid_to_exec_file
) (int pid
);
440 char *(*to_core_file_to_sym_file
) (char *);
441 enum strata to_stratum
;
443 *DONT_USE
; /* formerly to_next */
444 int to_has_all_memory
;
447 int to_has_registers
;
448 int to_has_execution
;
449 int to_has_thread_control
; /* control thread execution */
454 /* ASYNC target controls */
455 int (*to_can_async_p
) (void);
456 int (*to_is_async_p
) (void);
457 void (*to_async
) (void (*cb
) (enum inferior_event_type
, void *context
),
459 int to_async_mask_value
;
461 /* Need sub-structure for target machine related rather than comm related?
465 /* Magic number for checking ops size. If a struct doesn't end with this
466 number, somebody changed the declaration but didn't change all the
467 places that initialize one. */
469 #define OPS_MAGIC 3840
471 /* The ops structure for our "current" target process. This should
472 never be NULL. If there is no target, it points to the dummy_target. */
474 extern struct target_ops current_target
;
476 /* An item on the target stack. */
478 struct target_stack_item
480 struct target_stack_item
*next
;
481 struct target_ops
*target_ops
;
484 /* The target stack. */
486 extern struct target_stack_item
*target_stack
;
488 /* Define easy words for doing these operations on our current target. */
490 #define target_shortname (current_target.to_shortname)
491 #define target_longname (current_target.to_longname)
493 /* The open routine takes the rest of the parameters from the command,
494 and (if successful) pushes a new target onto the stack.
495 Targets should supply this routine, if only to provide an error message. */
497 #define target_open(name, from_tty) \
499 dcache_invalidate (target_dcache); \
500 (*current_target.to_open) (name, from_tty); \
503 /* Does whatever cleanup is required for a target that we are no longer
504 going to be calling. Argument says whether we are quitting gdb and
505 should not get hung in case of errors, or whether we want a clean
506 termination even if it takes a while. This routine is automatically
507 always called just before a routine is popped off the target stack.
508 Closing file descriptors and freeing memory are typical things it should
511 #define target_close(quitting) \
512 (*current_target.to_close) (quitting)
514 /* Attaches to a process on the target side. Arguments are as passed
515 to the `attach' command by the user. This routine can be called
516 when the target is not on the target-stack, if the target_can_run
517 routine returns 1; in that case, it must push itself onto the stack.
518 Upon exit, the target should be ready for normal operations, and
519 should be ready to deliver the status of the process immediately
520 (without waiting) to an upcoming target_wait call. */
522 #define target_attach(args, from_tty) \
523 (*current_target.to_attach) (args, from_tty)
525 /* The target_attach operation places a process under debugger control,
526 and stops the process.
528 This operation provides a target-specific hook that allows the
529 necessary bookkeeping to be performed after an attach completes. */
530 #define target_post_attach(pid) \
531 (*current_target.to_post_attach) (pid)
533 /* Attaches to a process on the target side, if not already attached.
534 (If already attached, takes no action.)
536 This operation can be used to follow the child 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 not require an
539 actual attach operation. */
541 #define target_require_attach(args, from_tty) \
542 (*current_target.to_require_attach) (args, from_tty)
544 /* Takes a program previously attached to and detaches it.
545 The program may resume execution (some targets do, some don't) and will
546 no longer stop on signals, etc. We better not have left any breakpoints
547 in the program or it'll die when it hits one. ARGS is arguments
548 typed by the user (e.g. a signal to send the process). FROM_TTY
549 says whether to be verbose or not. */
551 extern void target_detach (char *, int);
553 /* Detaches from a process on the target side, if not already dettached.
554 (If already detached, takes no action.)
556 This operation can be used to follow the parent process of a fork.
557 On some targets, such child processes of an original inferior process
558 are automatically under debugger control, and thus do require an actual
561 PID is the process id of the child to detach from.
562 ARGS is arguments typed by the user (e.g. a signal to send the process).
563 FROM_TTY says whether to be verbose or not. */
565 #define target_require_detach(pid, args, from_tty) \
566 (*current_target.to_require_detach) (pid, args, from_tty)
568 /* Resume execution of the target process PID. STEP says whether to
569 single-step or to run free; SIGGNAL is the signal to be given to
570 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
571 pass TARGET_SIGNAL_DEFAULT. */
573 #define target_resume(pid, step, siggnal) \
575 dcache_invalidate(target_dcache); \
576 (*current_target.to_resume) (pid, step, siggnal); \
579 /* Wait for process pid to do something. Pid = -1 to wait for any pid
580 to do something. Return pid of child, or -1 in case of error;
581 store status through argument pointer STATUS. Note that it is
582 *not* OK to return_to_top_level out of target_wait without popping
583 the debugging target from the stack; GDB isn't prepared to get back
584 to the prompt with a debugging target but without the frame cache,
585 stop_pc, etc., set up. */
587 #define target_wait(pid, status) \
588 (*current_target.to_wait) (pid, status)
590 /* The target_wait operation waits for a process event to occur, and
591 thereby stop the process.
593 On some targets, certain events may happen in sequences. gdb's
594 correct response to any single event of such a sequence may require
595 knowledge of what earlier events in the sequence have been seen.
597 This operation provides a target-specific hook that allows the
598 necessary bookkeeping to be performed to track such sequences. */
600 #define target_post_wait(pid, status) \
601 (*current_target.to_post_wait) (pid, status)
603 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
605 #define target_fetch_registers(regno) \
606 (*current_target.to_fetch_registers) (regno)
608 /* Store at least register REGNO, or all regs if REGNO == -1.
609 It can store as many registers as it wants to, so target_prepare_to_store
610 must have been previously called. Calls error() if there are problems. */
612 #define target_store_registers(regs) \
613 (*current_target.to_store_registers) (regs)
615 /* Get ready to modify the registers array. On machines which store
616 individual registers, this doesn't need to do anything. On machines
617 which store all the registers in one fell swoop, this makes sure
618 that REGISTERS contains all the registers from the program being
621 #define target_prepare_to_store() \
622 (*current_target.to_prepare_to_store) ()
624 extern DCACHE
*target_dcache
;
626 extern int do_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
627 struct mem_attrib
*attrib
);
629 extern int target_read_string (CORE_ADDR
, char **, int, int *);
631 extern int target_read_memory (CORE_ADDR memaddr
, char *myaddr
, int len
);
633 extern int target_write_memory (CORE_ADDR memaddr
, char *myaddr
, int len
);
635 extern int xfer_memory (CORE_ADDR
, char *, int, int,
636 struct mem_attrib
*, struct target_ops
*);
638 extern int child_xfer_memory (CORE_ADDR
, char *, int, int,
639 struct mem_attrib
*, struct target_ops
*);
641 /* Make a single attempt at transfering LEN bytes. On a successful
642 transfer, the number of bytes actually transfered is returned and
643 ERR is set to 0. When a transfer fails, -1 is returned (the number
644 of bytes actually transfered is not defined) and ERR is set to a
645 non-zero error indication. */
648 target_read_memory_partial (CORE_ADDR addr
, char *buf
, int len
, int *err
);
651 target_write_memory_partial (CORE_ADDR addr
, char *buf
, int len
, int *err
);
653 extern char *child_pid_to_exec_file (int);
655 extern char *child_core_file_to_sym_file (char *);
657 #if defined(CHILD_POST_ATTACH)
658 extern void child_post_attach (int);
661 extern void child_post_wait (int, int);
663 extern void child_post_startup_inferior (int);
665 extern void child_acknowledge_created_inferior (int);
667 extern void child_clone_and_follow_inferior (int, int *);
669 extern void child_post_follow_inferior_by_clone (void);
671 extern int child_insert_fork_catchpoint (int);
673 extern int child_remove_fork_catchpoint (int);
675 extern int child_insert_vfork_catchpoint (int);
677 extern int child_remove_vfork_catchpoint (int);
679 extern int child_has_forked (int, int *);
681 extern int child_has_vforked (int, int *);
683 extern void child_acknowledge_created_inferior (int);
685 extern int child_can_follow_vfork_prior_to_exec (void);
687 extern void child_post_follow_vfork (int, int, int, int);
689 extern int child_insert_exec_catchpoint (int);
691 extern int child_remove_exec_catchpoint (int);
693 extern int child_has_execd (int, char **);
695 extern int child_reported_exec_events_per_exec_call (void);
697 extern int child_has_syscall_event (int, enum target_waitkind
*, int *);
699 extern int child_has_exited (int, int, int *);
701 extern int child_thread_alive (int);
705 extern void print_section_info (struct target_ops
*, bfd
*);
707 /* Print a line about the current target. */
709 #define target_files_info() \
710 (*current_target.to_files_info) (¤t_target)
712 /* Insert a breakpoint at address ADDR in the target machine.
713 SAVE is a pointer to memory allocated for saving the
714 target contents. It is guaranteed by the caller to be long enough
715 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
718 #define target_insert_breakpoint(addr, save) \
719 (*current_target.to_insert_breakpoint) (addr, save)
721 /* Remove a breakpoint at address ADDR in the target machine.
722 SAVE is a pointer to the same save area
723 that was previously passed to target_insert_breakpoint.
724 Result is 0 for success, or an errno value. */
726 #define target_remove_breakpoint(addr, save) \
727 (*current_target.to_remove_breakpoint) (addr, save)
729 /* Initialize the terminal settings we record for the inferior,
730 before we actually run the inferior. */
732 #define target_terminal_init() \
733 (*current_target.to_terminal_init) ()
735 /* Put the inferior's terminal settings into effect.
736 This is preparation for starting or resuming the inferior. */
738 #define target_terminal_inferior() \
739 (*current_target.to_terminal_inferior) ()
741 /* Put some of our terminal settings into effect,
742 enough to get proper results from our output,
743 but do not change into or out of RAW mode
744 so that no input is discarded.
746 After doing this, either terminal_ours or terminal_inferior
747 should be called to get back to a normal state of affairs. */
749 #define target_terminal_ours_for_output() \
750 (*current_target.to_terminal_ours_for_output) ()
752 /* Put our terminal settings into effect.
753 First record the inferior's terminal settings
754 so they can be restored properly later. */
756 #define target_terminal_ours() \
757 (*current_target.to_terminal_ours) ()
759 /* Print useful information about our terminal status, if such a thing
762 #define target_terminal_info(arg, from_tty) \
763 (*current_target.to_terminal_info) (arg, from_tty)
765 /* Kill the inferior process. Make it go away. */
767 #define target_kill() \
768 (*current_target.to_kill) ()
770 /* Load an executable file into the target process. This is expected
771 to not only bring new code into the target process, but also to
772 update GDB's symbol tables to match. */
774 extern void target_load (char *arg
, int from_tty
);
776 /* Look up a symbol in the target's symbol table. NAME is the symbol
777 name. ADDRP is a CORE_ADDR * pointing to where the value of the
778 symbol should be returned. The result is 0 if successful, nonzero
779 if the symbol does not exist in the target environment. This
780 function should not call error() if communication with the target
781 is interrupted, since it is called from symbol reading, but should
782 return nonzero, possibly doing a complain(). */
784 #define target_lookup_symbol(name, addrp) \
785 (*current_target.to_lookup_symbol) (name, addrp)
787 /* Start an inferior process and set inferior_pid to its pid.
788 EXEC_FILE is the file to run.
789 ALLARGS is a string containing the arguments to the program.
790 ENV is the environment vector to pass. Errors reported with error().
791 On VxWorks and various standalone systems, we ignore exec_file. */
793 #define target_create_inferior(exec_file, args, env) \
794 (*current_target.to_create_inferior) (exec_file, args, env)
797 /* Some targets (such as ttrace-based HPUX) don't allow us to request
798 notification of inferior events such as fork and vork immediately
799 after the inferior is created. (This because of how gdb gets an
800 inferior created via invoking a shell to do it. In such a scenario,
801 if the shell init file has commands in it, the shell will fork and
802 exec for each of those commands, and we will see each such fork
805 Such targets will supply an appropriate definition for this function. */
807 #define target_post_startup_inferior(pid) \
808 (*current_target.to_post_startup_inferior) (pid)
810 /* On some targets, the sequence of starting up an inferior requires
811 some synchronization between gdb and the new inferior process, PID. */
813 #define target_acknowledge_created_inferior(pid) \
814 (*current_target.to_acknowledge_created_inferior) (pid)
816 /* An inferior process has been created via a fork() or similar
817 system call. This function will clone the debugger, then ensure
818 that CHILD_PID is attached to by that debugger.
820 FOLLOWED_CHILD is set TRUE on return *for the clone debugger only*,
821 and FALSE otherwise. (The original and clone debuggers can use this
822 to determine which they are, if need be.)
824 (This is not a terribly useful feature without a GUI to prevent
825 the two debuggers from competing for shell input.) */
827 #define target_clone_and_follow_inferior(child_pid,followed_child) \
828 (*current_target.to_clone_and_follow_inferior) (child_pid, followed_child)
830 /* This operation is intended to be used as the last in a sequence of
831 steps taken when following both parent and child of a fork. This
832 is used by a clone of the debugger, which will follow the child.
834 The original debugger has detached from this process, and the
835 clone has attached to it.
837 On some targets, this requires a bit of cleanup to make it work
840 #define target_post_follow_inferior_by_clone() \
841 (*current_target.to_post_follow_inferior_by_clone) ()
843 /* On some targets, we can catch an inferior fork or vfork event when
844 it occurs. These functions insert/remove an already-created
845 catchpoint for such events. */
847 #define target_insert_fork_catchpoint(pid) \
848 (*current_target.to_insert_fork_catchpoint) (pid)
850 #define target_remove_fork_catchpoint(pid) \
851 (*current_target.to_remove_fork_catchpoint) (pid)
853 #define target_insert_vfork_catchpoint(pid) \
854 (*current_target.to_insert_vfork_catchpoint) (pid)
856 #define target_remove_vfork_catchpoint(pid) \
857 (*current_target.to_remove_vfork_catchpoint) (pid)
859 /* Returns TRUE if PID has invoked the fork() system call. And,
860 also sets CHILD_PID to the process id of the other ("child")
861 inferior process that was created by that call. */
863 #define target_has_forked(pid,child_pid) \
864 (*current_target.to_has_forked) (pid,child_pid)
866 /* Returns TRUE if PID has invoked the vfork() system call. And,
867 also sets CHILD_PID to the process id of the other ("child")
868 inferior process that was created by that call. */
870 #define target_has_vforked(pid,child_pid) \
871 (*current_target.to_has_vforked) (pid,child_pid)
873 /* Some platforms (such as pre-10.20 HP-UX) don't allow us to do
874 anything to a vforked child before it subsequently calls exec().
875 On such platforms, we say that the debugger cannot "follow" the
876 child until it has vforked.
878 This function should be defined to return 1 by those targets
879 which can allow the debugger to immediately follow a vforked
880 child, and 0 if they cannot. */
882 #define target_can_follow_vfork_prior_to_exec() \
883 (*current_target.to_can_follow_vfork_prior_to_exec) ()
885 /* An inferior process has been created via a vfork() system call.
886 The debugger has followed the parent, the child, or both. The
887 process of setting up for that follow may have required some
888 target-specific trickery to track the sequence of reported events.
889 If so, this function should be defined by those targets that
890 require the debugger to perform cleanup or initialization after
893 #define target_post_follow_vfork(parent_pid,followed_parent,child_pid,followed_child) \
894 (*current_target.to_post_follow_vfork) (parent_pid,followed_parent,child_pid,followed_child)
896 /* On some targets, we can catch an inferior exec event when it
897 occurs. These functions insert/remove an already-created
898 catchpoint for such events. */
900 #define target_insert_exec_catchpoint(pid) \
901 (*current_target.to_insert_exec_catchpoint) (pid)
903 #define target_remove_exec_catchpoint(pid) \
904 (*current_target.to_remove_exec_catchpoint) (pid)
906 /* Returns TRUE if PID has invoked a flavor of the exec() system call.
907 And, also sets EXECD_PATHNAME to the pathname of the executable
908 file that was passed to exec(), and is now being executed. */
910 #define target_has_execd(pid,execd_pathname) \
911 (*current_target.to_has_execd) (pid,execd_pathname)
913 /* Returns the number of exec events that are reported when a process
914 invokes a flavor of the exec() system call on this target, if exec
915 events are being reported. */
917 #define target_reported_exec_events_per_exec_call() \
918 (*current_target.to_reported_exec_events_per_exec_call) ()
920 /* Returns TRUE if PID has reported a syscall event. And, also sets
921 KIND to the appropriate TARGET_WAITKIND_, and sets SYSCALL_ID to
922 the unique integer ID of the syscall. */
924 #define target_has_syscall_event(pid,kind,syscall_id) \
925 (*current_target.to_has_syscall_event) (pid,kind,syscall_id)
927 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
928 exit code of PID, if any. */
930 #define target_has_exited(pid,wait_status,exit_status) \
931 (*current_target.to_has_exited) (pid,wait_status,exit_status)
933 /* The debugger has completed a blocking wait() call. There is now
934 some process event that must be processed. This function should
935 be defined by those targets that require the debugger to perform
936 cleanup or internal state changes in response to the process event. */
938 /* The inferior process has died. Do what is right. */
940 #define target_mourn_inferior() \
941 (*current_target.to_mourn_inferior) ()
943 /* Does target have enough data to do a run or attach command? */
945 #define target_can_run(t) \
948 /* post process changes to signal handling in the inferior. */
950 #define target_notice_signals(pid) \
951 (*current_target.to_notice_signals) (pid)
953 /* Check to see if a thread is still alive. */
955 #define target_thread_alive(pid) \
956 (*current_target.to_thread_alive) (pid)
958 /* Query for new threads and add them to the thread list. */
960 #define target_find_new_threads() \
961 (*current_target.to_find_new_threads) (); \
963 /* Make target stop in a continuable fashion. (For instance, under
964 Unix, this should act like SIGSTOP). This function is normally
965 used by GUIs to implement a stop button. */
967 #define target_stop current_target.to_stop
969 /* Queries the target side for some information. The first argument is a
970 letter specifying the type of the query, which is used to determine who
971 should process it. The second argument is a string that specifies which
972 information is desired and the third is a buffer that carries back the
973 response from the target side. The fourth parameter is the size of the
974 output buffer supplied. */
976 #define target_query(query_type, query, resp_buffer, bufffer_size) \
977 (*current_target.to_query) (query_type, query, resp_buffer, bufffer_size)
979 /* Send the specified COMMAND to the target's monitor
980 (shell,interpreter) for execution. The result of the query is
983 #define target_rcmd(command, outbuf) \
984 (*current_target.to_rcmd) (command, outbuf)
987 /* Get the symbol information for a breakpointable routine called when
988 an exception event occurs.
989 Intended mainly for C++, and for those
990 platforms/implementations where such a callback mechanism is available,
991 e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support
992 different mechanisms for debugging exceptions. */
994 #define target_enable_exception_callback(kind, enable) \
995 (*current_target.to_enable_exception_callback) (kind, enable)
997 /* Get the current exception event kind -- throw or catch, etc. */
999 #define target_get_current_exception_event() \
1000 (*current_target.to_get_current_exception_event) ()
1002 /* Pointer to next target in the chain, e.g. a core file and an exec file. */
1004 #define target_next \
1005 (current_target.to_next)
1007 /* Does the target include all of memory, or only part of it? This
1008 determines whether we look up the target chain for other parts of
1009 memory if this target can't satisfy a request. */
1011 #define target_has_all_memory \
1012 (current_target.to_has_all_memory)
1014 /* Does the target include memory? (Dummy targets don't.) */
1016 #define target_has_memory \
1017 (current_target.to_has_memory)
1019 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1020 we start a process.) */
1022 #define target_has_stack \
1023 (current_target.to_has_stack)
1025 /* Does the target have registers? (Exec files don't.) */
1027 #define target_has_registers \
1028 (current_target.to_has_registers)
1030 /* Does the target have execution? Can we make it jump (through
1031 hoops), or pop its stack a few times? FIXME: If this is to work that
1032 way, it needs to check whether an inferior actually exists.
1033 remote-udi.c and probably other targets can be the current target
1034 when the inferior doesn't actually exist at the moment. Right now
1035 this just tells us whether this target is *capable* of execution. */
1037 #define target_has_execution \
1038 (current_target.to_has_execution)
1040 /* Can the target support the debugger control of thread execution?
1041 a) Can it lock the thread scheduler?
1042 b) Can it switch the currently running thread? */
1044 #define target_can_lock_scheduler \
1045 (current_target.to_has_thread_control & tc_schedlock)
1047 #define target_can_switch_threads \
1048 (current_target.to_has_thread_control & tc_switch)
1050 /* Can the target support asynchronous execution? */
1051 #define target_can_async_p() (current_target.to_can_async_p ())
1053 /* Is the target in asynchronous execution mode? */
1054 #define target_is_async_p() (current_target.to_is_async_p())
1056 /* Put the target in async mode with the specified callback function. */
1057 #define target_async(CALLBACK,CONTEXT) \
1058 (current_target.to_async((CALLBACK), (CONTEXT)))
1060 /* This is to be used ONLY within run_stack_dummy(). It
1061 provides a workaround, to have inferior function calls done in
1062 sychronous mode, even though the target is asynchronous. After
1063 target_async_mask(0) is called, calls to target_can_async_p() will
1064 return FALSE , so that target_resume() will not try to start the
1065 target asynchronously. After the inferior stops, we IMMEDIATELY
1066 restore the previous nature of the target, by calling
1067 target_async_mask(1). After that, target_can_async_p() will return
1068 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
1070 FIXME ezannoni 1999-12-13: we won't need this once we move
1071 the turning async on and off to the single execution commands,
1072 from where it is done currently, in remote_resume(). */
1074 #define target_async_mask_value \
1075 (current_target.to_async_mask_value)
1077 extern int target_async_mask (int mask
);
1079 extern void target_link (char *, CORE_ADDR
*);
1081 /* Converts a process id to a string. Usually, the string just contains
1082 `process xyz', but on some systems it may contain
1083 `process xyz thread abc'. */
1085 #undef target_pid_to_str
1086 #define target_pid_to_str(PID) current_target.to_pid_to_str (PID)
1088 #ifndef target_tid_to_str
1089 #define target_tid_to_str(PID) \
1090 target_pid_to_str (PID)
1091 extern char *normal_pid_to_str (int pid
);
1094 /* Return a short string describing extra information about PID,
1095 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1098 #define target_extra_thread_info(TP) \
1099 (current_target.to_extra_thread_info (TP))
1102 * New Objfile Event Hook:
1104 * Sometimes a GDB component wants to get notified whenever a new
1105 * objfile is loaded. Mainly this is used by thread-debugging
1106 * implementations that need to know when symbols for the target
1107 * thread implemenation are available.
1109 * The old way of doing this is to define a macro 'target_new_objfile'
1110 * that points to the function that you want to be called on every
1111 * objfile/shlib load.
1113 * The new way is to grab the function pointer, 'target_new_objfile_hook',
1114 * and point it to the function that you want to be called on every
1115 * objfile/shlib load.
1117 * If multiple clients are willing to be cooperative, they can each
1118 * save a pointer to the previous value of target_new_objfile_hook
1119 * before modifying it, and arrange for their function to call the
1120 * previous function in the chain. In that way, multiple clients
1121 * can receive this notification (something like with signal handlers).
1124 extern void (*target_new_objfile_hook
) (struct objfile
*);
1126 #ifndef target_pid_or_tid_to_str
1127 #define target_pid_or_tid_to_str(ID) \
1128 target_pid_to_str (ID)
1131 /* Attempts to find the pathname of the executable file
1132 that was run to create a specified process.
1134 The process PID must be stopped when this operation is used.
1136 If the executable file cannot be determined, NULL is returned.
1138 Else, a pointer to a character string containing the pathname
1139 is returned. This string should be copied into a buffer by
1140 the client if the string will not be immediately used, or if
1143 #define target_pid_to_exec_file(pid) \
1144 (current_target.to_pid_to_exec_file) (pid)
1146 /* Hook to call target-dependent code after reading in a new symbol table. */
1148 #ifndef TARGET_SYMFILE_POSTREAD
1149 #define TARGET_SYMFILE_POSTREAD(OBJFILE)
1152 /* Hook to call target dependent code just after inferior target process has
1155 #ifndef TARGET_CREATE_INFERIOR_HOOK
1156 #define TARGET_CREATE_INFERIOR_HOOK(PID)
1159 /* Hardware watchpoint interfaces. */
1161 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1164 #ifndef STOPPED_BY_WATCHPOINT
1165 #define STOPPED_BY_WATCHPOINT(w) 0
1168 /* HP-UX supplies these operations, which respectively disable and enable
1169 the memory page-protections that are used to implement hardware watchpoints
1170 on that platform. See wait_for_inferior's use of these. */
1172 #if !defined(TARGET_DISABLE_HW_WATCHPOINTS)
1173 #define TARGET_DISABLE_HW_WATCHPOINTS(pid)
1176 #if !defined(TARGET_ENABLE_HW_WATCHPOINTS)
1177 #define TARGET_ENABLE_HW_WATCHPOINTS(pid)
1180 /* Provide defaults for systems that don't support hardware watchpoints. */
1182 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
1184 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1185 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1186 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1187 (including this one?). OTHERTYPE is who knows what... */
1189 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
1191 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
1192 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
1193 ((LONGEST)(byte_count) <= REGISTER_SIZE)
1196 /* However, some addresses may not be profitable to use hardware to watch,
1197 or may be difficult to understand when the addressed object is out of
1198 scope, and hence should be unwatched. On some targets, this may have
1199 severe performance penalties, such that we might as well use regular
1200 watchpoints, and save (possibly precious) hardware watchpoints for other
1203 #if !defined(TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT)
1204 #define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) 0
1208 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
1209 for write, 1 for read, and 2 for read/write accesses. Returns 0 for
1210 success, non-zero for failure. */
1212 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
1213 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
1215 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
1217 #ifndef target_insert_hw_breakpoint
1218 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
1219 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
1222 #ifndef target_stopped_data_address
1223 #define target_stopped_data_address() 0
1226 /* If defined, then we need to decr pc by this much after a hardware break-
1227 point. Presumably this overrides DECR_PC_AFTER_BREAK... */
1229 #ifndef DECR_PC_AFTER_HW_BREAK
1230 #define DECR_PC_AFTER_HW_BREAK 0
1233 /* Sometimes gdb may pick up what appears to be a valid target address
1234 from a minimal symbol, but the value really means, essentially,
1235 "This is an index into a table which is populated when the inferior
1236 is run. Therefore, do not attempt to use this as a PC." */
1238 #if !defined(PC_REQUIRES_RUN_BEFORE_USE)
1239 #define PC_REQUIRES_RUN_BEFORE_USE(pc) (0)
1242 /* This will only be defined by a target that supports catching vfork events,
1245 On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked
1246 child process after it has exec'd, causes the parent process to resume as
1247 well. To prevent the parent from running spontaneously, such targets should
1248 define this to a function that prevents that from happening. */
1249 #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED)
1250 #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0)
1253 /* This will only be defined by a target that supports catching vfork events,
1256 On some targets (such as HP-UX 10.20 and earlier), a newly vforked child
1257 process must be resumed when it delivers its exec event, before the parent
1258 vfork event will be delivered to us. */
1260 #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK)
1261 #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0)
1264 /* Routines for maintenance of the target structures...
1266 add_target: Add a target to the list of all possible targets.
1268 push_target: Make this target the top of the stack of currently used
1269 targets, within its particular stratum of the stack. Result
1270 is 0 if now atop the stack, nonzero if not on top (maybe
1273 unpush_target: Remove this from the stack of currently used targets,
1274 no matter where it is on the list. Returns 0 if no
1275 change, 1 if removed from stack.
1277 pop_target: Remove the top thing on the stack of current targets. */
1279 extern void add_target (struct target_ops
*);
1281 extern int push_target (struct target_ops
*);
1283 extern int unpush_target (struct target_ops
*);
1285 extern void target_preopen (int);
1287 extern void pop_target (void);
1289 /* Struct section_table maps address ranges to file sections. It is
1290 mostly used with BFD files, but can be used without (e.g. for handling
1291 raw disks, or files not in formats handled by BFD). */
1293 struct section_table
1295 CORE_ADDR addr
; /* Lowest address in section */
1296 CORE_ADDR endaddr
; /* 1+highest address in section */
1298 sec_ptr the_bfd_section
;
1300 bfd
*bfd
; /* BFD file pointer */
1303 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
1304 Returns 0 if OK, 1 on error. */
1307 build_section_table (bfd
*, struct section_table
**, struct section_table
**);
1309 /* From mem-break.c */
1311 extern int memory_remove_breakpoint (CORE_ADDR
, char *);
1313 extern int memory_insert_breakpoint (CORE_ADDR
, char *);
1315 extern int default_memory_remove_breakpoint (CORE_ADDR
, char *);
1317 extern int default_memory_insert_breakpoint (CORE_ADDR
, char *);
1319 extern breakpoint_from_pc_fn memory_breakpoint_from_pc
;
1324 extern void initialize_targets (void);
1326 extern void noprocess (void);
1328 extern void find_default_attach (char *, int);
1330 extern void find_default_require_attach (char *, int);
1332 extern void find_default_require_detach (int, char *, int);
1334 extern void find_default_create_inferior (char *, char *, char **);
1336 extern void find_default_clone_and_follow_inferior (int, int *);
1338 extern struct target_ops
*find_run_target (void);
1340 extern struct target_ops
*find_core_target (void);
1342 extern struct target_ops
*find_target_beneath (struct target_ops
*);
1345 target_resize_to_sections (struct target_ops
*target
, int num_added
);
1347 extern void remove_target_sections (bfd
*abfd
);
1350 /* Stuff that should be shared among the various remote targets. */
1352 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1353 information (higher values, more information). */
1354 extern int remote_debug
;
1356 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1357 extern int baud_rate
;
1358 /* Timeout limit for response from target. */
1359 extern int remote_timeout
;
1362 /* Functions for helping to write a native target. */
1364 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1365 extern void store_waitstatus (struct target_waitstatus
*, int);
1367 /* Predicate to target_signal_to_host(). Return non-zero if the enum
1368 targ_signal SIGNO has an equivalent ``host'' representation. */
1369 /* FIXME: cagney/1999-11-22: The name below was chosen in preference
1370 to the shorter target_signal_p() because it is far less ambigious.
1371 In this context ``target_signal'' refers to GDB's internal
1372 representation of the target's set of signals while ``host signal''
1373 refers to the target operating system's signal. Confused? */
1375 extern int target_signal_to_host_p (enum target_signal signo
);
1377 /* Convert between host signal numbers and enum target_signal's.
1378 target_signal_to_host() returns 0 and prints a warning() on GDB's
1379 console if SIGNO has no equivalent host representation. */
1380 /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is
1381 refering to the target operating system's signal numbering.
1382 Similarly, ``enum target_signal'' is named incorrectly, ``enum
1383 gdb_signal'' would probably be better as it is refering to GDB's
1384 internal representation of a target operating system's signal. */
1386 extern enum target_signal
target_signal_from_host (int);
1387 extern int target_signal_to_host (enum target_signal
);
1389 /* Convert from a number used in a GDB command to an enum target_signal. */
1390 extern enum target_signal
target_signal_from_command (int);
1392 /* Any target can call this to switch to remote protocol (in remote.c). */
1393 extern void push_remote_target (char *name
, int from_tty
);
1395 /* Imported from machine dependent code */
1397 #ifndef SOFTWARE_SINGLE_STEP_P
1398 #define SOFTWARE_SINGLE_STEP_P 0
1399 #define SOFTWARE_SINGLE_STEP(sig,bp_p) \
1400 (internal_error (__FILE__, __LINE__, "SOFTWARE_SINGLE_STEP"), 0)
1401 #endif /* SOFTWARE_SINGLE_STEP_P */
1403 /* Blank target vector entries are initialized to target_ignore. */
1404 void target_ignore (void);
1406 /* Macro for getting target's idea of a frame pointer.
1407 FIXME: GDB's whole scheme for dealing with "frames" and
1408 "frame pointers" needs a serious shakedown. */
1409 #ifndef TARGET_VIRTUAL_FRAME_POINTER
1410 #define TARGET_VIRTUAL_FRAME_POINTER(ADDR, REGP, OFFP) \
1411 do { *(REGP) = FP_REGNUM; *(OFFP) = 0; } while (0)
1412 #endif /* TARGET_VIRTUAL_FRAME_POINTER */
1414 #endif /* !defined (TARGET_H) */