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1 | /* Interface between GDB and target environments, including files and processes | |
2 | ||
3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
4 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 | |
5 | Free Software Foundation, Inc. | |
6 | ||
7 | Contributed by Cygnus Support. Written by John Gilmore. | |
8 | ||
9 | This file is part of GDB. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
24 | Boston, MA 02110-1301, USA. */ | |
25 | ||
26 | #if !defined (TARGET_H) | |
27 | #define TARGET_H | |
28 | ||
29 | struct objfile; | |
30 | struct ui_file; | |
31 | struct mem_attrib; | |
32 | struct target_ops; | |
33 | ||
34 | /* This include file defines the interface between the main part | |
35 | of the debugger, and the part which is target-specific, or | |
36 | specific to the communications interface between us and the | |
37 | target. | |
38 | ||
39 | A TARGET is an interface between the debugger and a particular | |
40 | kind of file or process. Targets can be STACKED in STRATA, | |
41 | so that more than one target can potentially respond to a request. | |
42 | In particular, memory accesses will walk down the stack of targets | |
43 | until they find a target that is interested in handling that particular | |
44 | address. STRATA are artificial boundaries on the stack, within | |
45 | which particular kinds of targets live. Strata exist so that | |
46 | people don't get confused by pushing e.g. a process target and then | |
47 | a file target, and wondering why they can't see the current values | |
48 | of variables any more (the file target is handling them and they | |
49 | never get to the process target). So when you push a file target, | |
50 | it goes into the file stratum, which is always below the process | |
51 | stratum. */ | |
52 | ||
53 | #include "bfd.h" | |
54 | #include "symtab.h" | |
55 | #include "dcache.h" | |
56 | #include "memattr.h" | |
57 | ||
58 | enum strata | |
59 | { | |
60 | dummy_stratum, /* The lowest of the low */ | |
61 | file_stratum, /* Executable files, etc */ | |
62 | core_stratum, /* Core dump files */ | |
63 | download_stratum, /* Downloading of remote targets */ | |
64 | process_stratum, /* Executing processes */ | |
65 | thread_stratum /* Executing threads */ | |
66 | }; | |
67 | ||
68 | enum thread_control_capabilities | |
69 | { | |
70 | tc_none = 0, /* Default: can't control thread execution. */ | |
71 | tc_schedlock = 1, /* Can lock the thread scheduler. */ | |
72 | tc_switch = 2 /* Can switch the running thread on demand. */ | |
73 | }; | |
74 | ||
75 | /* Stuff for target_wait. */ | |
76 | ||
77 | /* Generally, what has the program done? */ | |
78 | enum target_waitkind | |
79 | { | |
80 | /* The program has exited. The exit status is in value.integer. */ | |
81 | TARGET_WAITKIND_EXITED, | |
82 | ||
83 | /* The program has stopped with a signal. Which signal is in | |
84 | value.sig. */ | |
85 | TARGET_WAITKIND_STOPPED, | |
86 | ||
87 | /* The program has terminated with a signal. Which signal is in | |
88 | value.sig. */ | |
89 | TARGET_WAITKIND_SIGNALLED, | |
90 | ||
91 | /* The program is letting us know that it dynamically loaded something | |
92 | (e.g. it called load(2) on AIX). */ | |
93 | TARGET_WAITKIND_LOADED, | |
94 | ||
95 | /* The program has forked. A "related" process' ID is in | |
96 | value.related_pid. I.e., if the child forks, value.related_pid | |
97 | is the parent's ID. */ | |
98 | ||
99 | TARGET_WAITKIND_FORKED, | |
100 | ||
101 | /* The program has vforked. A "related" process's ID is in | |
102 | value.related_pid. */ | |
103 | ||
104 | TARGET_WAITKIND_VFORKED, | |
105 | ||
106 | /* The program has exec'ed a new executable file. The new file's | |
107 | pathname is pointed to by value.execd_pathname. */ | |
108 | ||
109 | TARGET_WAITKIND_EXECD, | |
110 | ||
111 | /* The program has entered or returned from a system call. On | |
112 | HP-UX, this is used in the hardware watchpoint implementation. | |
113 | The syscall's unique integer ID number is in value.syscall_id */ | |
114 | ||
115 | TARGET_WAITKIND_SYSCALL_ENTRY, | |
116 | TARGET_WAITKIND_SYSCALL_RETURN, | |
117 | ||
118 | /* Nothing happened, but we stopped anyway. This perhaps should be handled | |
119 | within target_wait, but I'm not sure target_wait should be resuming the | |
120 | inferior. */ | |
121 | TARGET_WAITKIND_SPURIOUS, | |
122 | ||
123 | /* An event has occured, but we should wait again. | |
124 | Remote_async_wait() returns this when there is an event | |
125 | on the inferior, but the rest of the world is not interested in | |
126 | it. The inferior has not stopped, but has just sent some output | |
127 | to the console, for instance. In this case, we want to go back | |
128 | to the event loop and wait there for another event from the | |
129 | inferior, rather than being stuck in the remote_async_wait() | |
130 | function. This way the event loop is responsive to other events, | |
131 | like for instance the user typing. */ | |
132 | TARGET_WAITKIND_IGNORE | |
133 | }; | |
134 | ||
135 | struct target_waitstatus | |
136 | { | |
137 | enum target_waitkind kind; | |
138 | ||
139 | /* Forked child pid, execd pathname, exit status or signal number. */ | |
140 | union | |
141 | { | |
142 | int integer; | |
143 | enum target_signal sig; | |
144 | int related_pid; | |
145 | char *execd_pathname; | |
146 | int syscall_id; | |
147 | } | |
148 | value; | |
149 | }; | |
150 | ||
151 | /* Possible types of events that the inferior handler will have to | |
152 | deal with. */ | |
153 | enum inferior_event_type | |
154 | { | |
155 | /* There is a request to quit the inferior, abandon it. */ | |
156 | INF_QUIT_REQ, | |
157 | /* Process a normal inferior event which will result in target_wait | |
158 | being called. */ | |
159 | INF_REG_EVENT, | |
160 | /* Deal with an error on the inferior. */ | |
161 | INF_ERROR, | |
162 | /* We are called because a timer went off. */ | |
163 | INF_TIMER, | |
164 | /* We are called to do stuff after the inferior stops. */ | |
165 | INF_EXEC_COMPLETE, | |
166 | /* We are called to do some stuff after the inferior stops, but we | |
167 | are expected to reenter the proceed() and | |
168 | handle_inferior_event() functions. This is used only in case of | |
169 | 'step n' like commands. */ | |
170 | INF_EXEC_CONTINUE | |
171 | }; | |
172 | ||
173 | /* Return the string for a signal. */ | |
174 | extern char *target_signal_to_string (enum target_signal); | |
175 | ||
176 | /* Return the name (SIGHUP, etc.) for a signal. */ | |
177 | extern char *target_signal_to_name (enum target_signal); | |
178 | ||
179 | /* Given a name (SIGHUP, etc.), return its signal. */ | |
180 | enum target_signal target_signal_from_name (char *); | |
181 | \f | |
182 | /* Request the transfer of up to LEN 8-bit bytes of the target's | |
183 | OBJECT. The OFFSET, for a seekable object, specifies the starting | |
184 | point. The ANNEX can be used to provide additional data-specific | |
185 | information to the target. | |
186 | ||
187 | Return the number of bytes actually transfered, zero when no | |
188 | further transfer is possible, and -1 when the transfer is not | |
189 | supported. | |
190 | ||
191 | NOTE: cagney/2003-10-17: The current interface does not support a | |
192 | "retry" mechanism. Instead it assumes that at least one byte will | |
193 | be transfered on each call. | |
194 | ||
195 | NOTE: cagney/2003-10-17: The current interface can lead to | |
196 | fragmented transfers. Lower target levels should not implement | |
197 | hacks, such as enlarging the transfer, in an attempt to compensate | |
198 | for this. Instead, the target stack should be extended so that it | |
199 | implements supply/collect methods and a look-aside object cache. | |
200 | With that available, the lowest target can safely and freely "push" | |
201 | data up the stack. | |
202 | ||
203 | NOTE: cagney/2003-10-17: Unlike the old query and the memory | |
204 | transfer mechanisms, these methods are explicitly parameterized by | |
205 | the target that it should be applied to. | |
206 | ||
207 | NOTE: cagney/2003-10-17: Just like the old query and memory xfer | |
208 | methods, these new methods perform partial transfers. The only | |
209 | difference is that these new methods thought to include "partial" | |
210 | in the name. The old code's failure to do this lead to much | |
211 | confusion and duplication of effort as each target object attempted | |
212 | to locally take responsibility for something it didn't have to | |
213 | worry about. | |
214 | ||
215 | NOTE: cagney/2003-10-17: With a TARGET_OBJECT_KOD object, for | |
216 | backward compatibility with the "target_query" method that this | |
217 | replaced, when OFFSET and LEN are both zero, return the "minimum" | |
218 | buffer size. See "remote.c" for further information. */ | |
219 | ||
220 | enum target_object | |
221 | { | |
222 | /* Kernel Object Display transfer. See "kod.c" and "remote.c". */ | |
223 | TARGET_OBJECT_KOD, | |
224 | /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */ | |
225 | TARGET_OBJECT_AVR, | |
226 | /* Transfer up-to LEN bytes of memory starting at OFFSET. */ | |
227 | TARGET_OBJECT_MEMORY, | |
228 | /* Kernel Unwind Table. See "ia64-tdep.c". */ | |
229 | TARGET_OBJECT_UNWIND_TABLE, | |
230 | /* Transfer auxilliary vector. */ | |
231 | TARGET_OBJECT_AUXV, | |
232 | /* StackGhost cookie. See "sparc-tdep.c". */ | |
233 | TARGET_OBJECT_WCOOKIE | |
234 | ||
235 | /* Possible future objects: TARGET_OBJECT_FILE, TARGET_OBJECT_PROC, ... */ | |
236 | }; | |
237 | ||
238 | extern LONGEST target_read_partial (struct target_ops *ops, | |
239 | enum target_object object, | |
240 | const char *annex, gdb_byte *buf, | |
241 | ULONGEST offset, LONGEST len); | |
242 | ||
243 | extern LONGEST target_write_partial (struct target_ops *ops, | |
244 | enum target_object object, | |
245 | const char *annex, const gdb_byte *buf, | |
246 | ULONGEST offset, LONGEST len); | |
247 | ||
248 | /* Wrappers to perform the full transfer. */ | |
249 | extern LONGEST target_read (struct target_ops *ops, | |
250 | enum target_object object, | |
251 | const char *annex, gdb_byte *buf, | |
252 | ULONGEST offset, LONGEST len); | |
253 | ||
254 | extern LONGEST target_write (struct target_ops *ops, | |
255 | enum target_object object, | |
256 | const char *annex, const gdb_byte *buf, | |
257 | ULONGEST offset, LONGEST len); | |
258 | ||
259 | /* Wrappers to target read/write that perform memory transfers. They | |
260 | throw an error if the memory transfer fails. | |
261 | ||
262 | NOTE: cagney/2003-10-23: The naming schema is lifted from | |
263 | "frame.h". The parameter order is lifted from get_frame_memory, | |
264 | which in turn lifted it from read_memory. */ | |
265 | ||
266 | extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr, | |
267 | gdb_byte *buf, LONGEST len); | |
268 | extern ULONGEST get_target_memory_unsigned (struct target_ops *ops, | |
269 | CORE_ADDR addr, int len); | |
270 | \f | |
271 | ||
272 | /* If certain kinds of activity happen, target_wait should perform | |
273 | callbacks. */ | |
274 | /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible | |
275 | on TARGET_ACTIVITY_FD. */ | |
276 | extern int target_activity_fd; | |
277 | /* Returns zero to leave the inferior alone, one to interrupt it. */ | |
278 | extern int (*target_activity_function) (void); | |
279 | \f | |
280 | struct thread_info; /* fwd decl for parameter list below: */ | |
281 | ||
282 | struct target_ops | |
283 | { | |
284 | struct target_ops *beneath; /* To the target under this one. */ | |
285 | char *to_shortname; /* Name this target type */ | |
286 | char *to_longname; /* Name for printing */ | |
287 | char *to_doc; /* Documentation. Does not include trailing | |
288 | newline, and starts with a one-line descrip- | |
289 | tion (probably similar to to_longname). */ | |
290 | /* Per-target scratch pad. */ | |
291 | void *to_data; | |
292 | /* The open routine takes the rest of the parameters from the | |
293 | command, and (if successful) pushes a new target onto the | |
294 | stack. Targets should supply this routine, if only to provide | |
295 | an error message. */ | |
296 | void (*to_open) (char *, int); | |
297 | /* Old targets with a static target vector provide "to_close". | |
298 | New re-entrant targets provide "to_xclose" and that is expected | |
299 | to xfree everything (including the "struct target_ops"). */ | |
300 | void (*to_xclose) (struct target_ops *targ, int quitting); | |
301 | void (*to_close) (int); | |
302 | void (*to_attach) (char *, int); | |
303 | void (*to_post_attach) (int); | |
304 | void (*to_detach) (char *, int); | |
305 | void (*to_disconnect) (char *, int); | |
306 | void (*to_resume) (ptid_t, int, enum target_signal); | |
307 | ptid_t (*to_wait) (ptid_t, struct target_waitstatus *); | |
308 | void (*to_fetch_registers) (int); | |
309 | void (*to_store_registers) (int); | |
310 | void (*to_prepare_to_store) (void); | |
311 | ||
312 | /* Transfer LEN bytes of memory between GDB address MYADDR and | |
313 | target address MEMADDR. If WRITE, transfer them to the target, else | |
314 | transfer them from the target. TARGET is the target from which we | |
315 | get this function. | |
316 | ||
317 | Return value, N, is one of the following: | |
318 | ||
319 | 0 means that we can't handle this. If errno has been set, it is the | |
320 | error which prevented us from doing it (FIXME: What about bfd_error?). | |
321 | ||
322 | positive (call it N) means that we have transferred N bytes | |
323 | starting at MEMADDR. We might be able to handle more bytes | |
324 | beyond this length, but no promises. | |
325 | ||
326 | negative (call its absolute value N) means that we cannot | |
327 | transfer right at MEMADDR, but we could transfer at least | |
328 | something at MEMADDR + N. | |
329 | ||
330 | NOTE: cagney/2004-10-01: This has been entirely superseeded by | |
331 | to_xfer_partial and inferior inheritance. */ | |
332 | ||
333 | int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr, | |
334 | int len, int write, | |
335 | struct mem_attrib *attrib, | |
336 | struct target_ops *target); | |
337 | ||
338 | void (*to_files_info) (struct target_ops *); | |
339 | int (*to_insert_breakpoint) (CORE_ADDR, gdb_byte *); | |
340 | int (*to_remove_breakpoint) (CORE_ADDR, gdb_byte *); | |
341 | int (*to_can_use_hw_breakpoint) (int, int, int); | |
342 | int (*to_insert_hw_breakpoint) (CORE_ADDR, gdb_byte *); | |
343 | int (*to_remove_hw_breakpoint) (CORE_ADDR, gdb_byte *); | |
344 | int (*to_remove_watchpoint) (CORE_ADDR, int, int); | |
345 | int (*to_insert_watchpoint) (CORE_ADDR, int, int); | |
346 | int (*to_stopped_by_watchpoint) (void); | |
347 | int to_have_continuable_watchpoint; | |
348 | int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *); | |
349 | int (*to_region_size_ok_for_hw_watchpoint) (int); | |
350 | void (*to_terminal_init) (void); | |
351 | void (*to_terminal_inferior) (void); | |
352 | void (*to_terminal_ours_for_output) (void); | |
353 | void (*to_terminal_ours) (void); | |
354 | void (*to_terminal_save_ours) (void); | |
355 | void (*to_terminal_info) (char *, int); | |
356 | void (*to_kill) (void); | |
357 | void (*to_load) (char *, int); | |
358 | int (*to_lookup_symbol) (char *, CORE_ADDR *); | |
359 | void (*to_create_inferior) (char *, char *, char **, int); | |
360 | void (*to_post_startup_inferior) (ptid_t); | |
361 | void (*to_acknowledge_created_inferior) (int); | |
362 | void (*to_insert_fork_catchpoint) (int); | |
363 | int (*to_remove_fork_catchpoint) (int); | |
364 | void (*to_insert_vfork_catchpoint) (int); | |
365 | int (*to_remove_vfork_catchpoint) (int); | |
366 | int (*to_follow_fork) (struct target_ops *, int); | |
367 | void (*to_insert_exec_catchpoint) (int); | |
368 | int (*to_remove_exec_catchpoint) (int); | |
369 | int (*to_reported_exec_events_per_exec_call) (void); | |
370 | int (*to_has_exited) (int, int, int *); | |
371 | void (*to_mourn_inferior) (void); | |
372 | int (*to_can_run) (void); | |
373 | void (*to_notice_signals) (ptid_t ptid); | |
374 | int (*to_thread_alive) (ptid_t ptid); | |
375 | void (*to_find_new_threads) (void); | |
376 | char *(*to_pid_to_str) (ptid_t); | |
377 | char *(*to_extra_thread_info) (struct thread_info *); | |
378 | void (*to_stop) (void); | |
379 | void (*to_rcmd) (char *command, struct ui_file *output); | |
380 | struct symtab_and_line *(*to_enable_exception_callback) (enum | |
381 | exception_event_kind, | |
382 | int); | |
383 | struct exception_event_record *(*to_get_current_exception_event) (void); | |
384 | char *(*to_pid_to_exec_file) (int pid); | |
385 | enum strata to_stratum; | |
386 | int to_has_all_memory; | |
387 | int to_has_memory; | |
388 | int to_has_stack; | |
389 | int to_has_registers; | |
390 | int to_has_execution; | |
391 | int to_has_thread_control; /* control thread execution */ | |
392 | struct section_table | |
393 | *to_sections; | |
394 | struct section_table | |
395 | *to_sections_end; | |
396 | /* ASYNC target controls */ | |
397 | int (*to_can_async_p) (void); | |
398 | int (*to_is_async_p) (void); | |
399 | void (*to_async) (void (*cb) (enum inferior_event_type, void *context), | |
400 | void *context); | |
401 | int to_async_mask_value; | |
402 | int (*to_find_memory_regions) (int (*) (CORE_ADDR, | |
403 | unsigned long, | |
404 | int, int, int, | |
405 | void *), | |
406 | void *); | |
407 | char * (*to_make_corefile_notes) (bfd *, int *); | |
408 | ||
409 | /* Return the thread-local address at OFFSET in the | |
410 | thread-local storage for the thread PTID and the shared library | |
411 | or executable file given by OBJFILE. If that block of | |
412 | thread-local storage hasn't been allocated yet, this function | |
413 | may return an error. */ | |
414 | CORE_ADDR (*to_get_thread_local_address) (ptid_t ptid, | |
415 | CORE_ADDR load_module_addr, | |
416 | CORE_ADDR offset); | |
417 | ||
418 | /* Perform partial transfers on OBJECT. See target_read_partial | |
419 | and target_write_partial for details of each variant. One, and | |
420 | only one, of readbuf or writebuf must be non-NULL. */ | |
421 | LONGEST (*to_xfer_partial) (struct target_ops *ops, | |
422 | enum target_object object, const char *annex, | |
423 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
424 | ULONGEST offset, LONGEST len); | |
425 | ||
426 | int to_magic; | |
427 | /* Need sub-structure for target machine related rather than comm related? | |
428 | */ | |
429 | }; | |
430 | ||
431 | /* Magic number for checking ops size. If a struct doesn't end with this | |
432 | number, somebody changed the declaration but didn't change all the | |
433 | places that initialize one. */ | |
434 | ||
435 | #define OPS_MAGIC 3840 | |
436 | ||
437 | /* The ops structure for our "current" target process. This should | |
438 | never be NULL. If there is no target, it points to the dummy_target. */ | |
439 | ||
440 | extern struct target_ops current_target; | |
441 | ||
442 | /* Define easy words for doing these operations on our current target. */ | |
443 | ||
444 | #define target_shortname (current_target.to_shortname) | |
445 | #define target_longname (current_target.to_longname) | |
446 | ||
447 | /* Does whatever cleanup is required for a target that we are no | |
448 | longer going to be calling. QUITTING indicates that GDB is exiting | |
449 | and should not get hung on an error (otherwise it is important to | |
450 | perform clean termination, even if it takes a while). This routine | |
451 | is automatically always called when popping the target off the | |
452 | target stack (to_beneath is undefined). Closing file descriptors | |
453 | and freeing all memory allocated memory are typical things it | |
454 | should do. */ | |
455 | ||
456 | void target_close (struct target_ops *targ, int quitting); | |
457 | ||
458 | /* Attaches to a process on the target side. Arguments are as passed | |
459 | to the `attach' command by the user. This routine can be called | |
460 | when the target is not on the target-stack, if the target_can_run | |
461 | routine returns 1; in that case, it must push itself onto the stack. | |
462 | Upon exit, the target should be ready for normal operations, and | |
463 | should be ready to deliver the status of the process immediately | |
464 | (without waiting) to an upcoming target_wait call. */ | |
465 | ||
466 | #define target_attach(args, from_tty) \ | |
467 | (*current_target.to_attach) (args, from_tty) | |
468 | ||
469 | /* The target_attach operation places a process under debugger control, | |
470 | and stops the process. | |
471 | ||
472 | This operation provides a target-specific hook that allows the | |
473 | necessary bookkeeping to be performed after an attach completes. */ | |
474 | #define target_post_attach(pid) \ | |
475 | (*current_target.to_post_attach) (pid) | |
476 | ||
477 | /* Takes a program previously attached to and detaches it. | |
478 | The program may resume execution (some targets do, some don't) and will | |
479 | no longer stop on signals, etc. We better not have left any breakpoints | |
480 | in the program or it'll die when it hits one. ARGS is arguments | |
481 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
482 | says whether to be verbose or not. */ | |
483 | ||
484 | extern void target_detach (char *, int); | |
485 | ||
486 | /* Disconnect from the current target without resuming it (leaving it | |
487 | waiting for a debugger). */ | |
488 | ||
489 | extern void target_disconnect (char *, int); | |
490 | ||
491 | /* Resume execution of the target process PTID. STEP says whether to | |
492 | single-step or to run free; SIGGNAL is the signal to be given to | |
493 | the target, or TARGET_SIGNAL_0 for no signal. The caller may not | |
494 | pass TARGET_SIGNAL_DEFAULT. */ | |
495 | ||
496 | #define target_resume(ptid, step, siggnal) \ | |
497 | do { \ | |
498 | dcache_invalidate(target_dcache); \ | |
499 | (*current_target.to_resume) (ptid, step, siggnal); \ | |
500 | } while (0) | |
501 | ||
502 | /* Wait for process pid to do something. PTID = -1 to wait for any | |
503 | pid to do something. Return pid of child, or -1 in case of error; | |
504 | store status through argument pointer STATUS. Note that it is | |
505 | _NOT_ OK to throw_exception() out of target_wait() without popping | |
506 | the debugging target from the stack; GDB isn't prepared to get back | |
507 | to the prompt with a debugging target but without the frame cache, | |
508 | stop_pc, etc., set up. */ | |
509 | ||
510 | #define target_wait(ptid, status) \ | |
511 | (*current_target.to_wait) (ptid, status) | |
512 | ||
513 | /* Fetch at least register REGNO, or all regs if regno == -1. No result. */ | |
514 | ||
515 | #define target_fetch_registers(regno) \ | |
516 | (*current_target.to_fetch_registers) (regno) | |
517 | ||
518 | /* Store at least register REGNO, or all regs if REGNO == -1. | |
519 | It can store as many registers as it wants to, so target_prepare_to_store | |
520 | must have been previously called. Calls error() if there are problems. */ | |
521 | ||
522 | #define target_store_registers(regs) \ | |
523 | (*current_target.to_store_registers) (regs) | |
524 | ||
525 | /* Get ready to modify the registers array. On machines which store | |
526 | individual registers, this doesn't need to do anything. On machines | |
527 | which store all the registers in one fell swoop, this makes sure | |
528 | that REGISTERS contains all the registers from the program being | |
529 | debugged. */ | |
530 | ||
531 | #define target_prepare_to_store() \ | |
532 | (*current_target.to_prepare_to_store) () | |
533 | ||
534 | extern DCACHE *target_dcache; | |
535 | ||
536 | extern int do_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, | |
537 | int write, struct mem_attrib *attrib); | |
538 | ||
539 | extern int target_read_string (CORE_ADDR, char **, int, int *); | |
540 | ||
541 | extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len); | |
542 | ||
543 | extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, | |
544 | int len); | |
545 | ||
546 | extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int, | |
547 | struct mem_attrib *, struct target_ops *); | |
548 | ||
549 | extern int child_xfer_memory (CORE_ADDR, gdb_byte *, int, int, | |
550 | struct mem_attrib *, struct target_ops *); | |
551 | ||
552 | /* Make a single attempt at transfering LEN bytes. On a successful | |
553 | transfer, the number of bytes actually transfered is returned and | |
554 | ERR is set to 0. When a transfer fails, -1 is returned (the number | |
555 | of bytes actually transfered is not defined) and ERR is set to a | |
556 | non-zero error indication. */ | |
557 | ||
558 | extern int target_read_memory_partial (CORE_ADDR addr, gdb_byte *buf, | |
559 | int len, int *err); | |
560 | ||
561 | extern int target_write_memory_partial (CORE_ADDR addr, gdb_byte *buf, | |
562 | int len, int *err); | |
563 | ||
564 | extern char *child_pid_to_exec_file (int); | |
565 | ||
566 | extern char *child_core_file_to_sym_file (char *); | |
567 | ||
568 | #if defined(CHILD_POST_ATTACH) | |
569 | extern void child_post_attach (int); | |
570 | #endif | |
571 | ||
572 | extern void child_post_startup_inferior (ptid_t); | |
573 | ||
574 | extern void child_acknowledge_created_inferior (int); | |
575 | ||
576 | extern void child_insert_fork_catchpoint (int); | |
577 | ||
578 | extern int child_remove_fork_catchpoint (int); | |
579 | ||
580 | extern void child_insert_vfork_catchpoint (int); | |
581 | ||
582 | extern int child_remove_vfork_catchpoint (int); | |
583 | ||
584 | extern void child_acknowledge_created_inferior (int); | |
585 | ||
586 | extern int child_follow_fork (struct target_ops *, int); | |
587 | ||
588 | extern void child_insert_exec_catchpoint (int); | |
589 | ||
590 | extern int child_remove_exec_catchpoint (int); | |
591 | ||
592 | extern int child_reported_exec_events_per_exec_call (void); | |
593 | ||
594 | extern int child_has_exited (int, int, int *); | |
595 | ||
596 | extern int child_thread_alive (ptid_t); | |
597 | ||
598 | /* From infrun.c. */ | |
599 | ||
600 | extern int inferior_has_forked (int pid, int *child_pid); | |
601 | ||
602 | extern int inferior_has_vforked (int pid, int *child_pid); | |
603 | ||
604 | extern int inferior_has_execd (int pid, char **execd_pathname); | |
605 | ||
606 | /* From exec.c */ | |
607 | ||
608 | extern void print_section_info (struct target_ops *, bfd *); | |
609 | ||
610 | /* Print a line about the current target. */ | |
611 | ||
612 | #define target_files_info() \ | |
613 | (*current_target.to_files_info) (¤t_target) | |
614 | ||
615 | /* Insert a breakpoint at address ADDR in the target machine. SAVE is | |
616 | a pointer to memory allocated for saving the target contents. It | |
617 | is guaranteed by the caller to be long enough to save the number of | |
618 | breakpoint bytes indicated by BREAKPOINT_FROM_PC. Result is 0 for | |
619 | success, or an errno value. */ | |
620 | ||
621 | #define target_insert_breakpoint(addr, save) \ | |
622 | (*current_target.to_insert_breakpoint) (addr, save) | |
623 | ||
624 | /* Remove a breakpoint at address ADDR in the target machine. | |
625 | SAVE is a pointer to the same save area | |
626 | that was previously passed to target_insert_breakpoint. | |
627 | Result is 0 for success, or an errno value. */ | |
628 | ||
629 | #define target_remove_breakpoint(addr, save) \ | |
630 | (*current_target.to_remove_breakpoint) (addr, save) | |
631 | ||
632 | /* Initialize the terminal settings we record for the inferior, | |
633 | before we actually run the inferior. */ | |
634 | ||
635 | #define target_terminal_init() \ | |
636 | (*current_target.to_terminal_init) () | |
637 | ||
638 | /* Put the inferior's terminal settings into effect. | |
639 | This is preparation for starting or resuming the inferior. */ | |
640 | ||
641 | #define target_terminal_inferior() \ | |
642 | (*current_target.to_terminal_inferior) () | |
643 | ||
644 | /* Put some of our terminal settings into effect, | |
645 | enough to get proper results from our output, | |
646 | but do not change into or out of RAW mode | |
647 | so that no input is discarded. | |
648 | ||
649 | After doing this, either terminal_ours or terminal_inferior | |
650 | should be called to get back to a normal state of affairs. */ | |
651 | ||
652 | #define target_terminal_ours_for_output() \ | |
653 | (*current_target.to_terminal_ours_for_output) () | |
654 | ||
655 | /* Put our terminal settings into effect. | |
656 | First record the inferior's terminal settings | |
657 | so they can be restored properly later. */ | |
658 | ||
659 | #define target_terminal_ours() \ | |
660 | (*current_target.to_terminal_ours) () | |
661 | ||
662 | /* Save our terminal settings. | |
663 | This is called from TUI after entering or leaving the curses | |
664 | mode. Since curses modifies our terminal this call is here | |
665 | to take this change into account. */ | |
666 | ||
667 | #define target_terminal_save_ours() \ | |
668 | (*current_target.to_terminal_save_ours) () | |
669 | ||
670 | /* Print useful information about our terminal status, if such a thing | |
671 | exists. */ | |
672 | ||
673 | #define target_terminal_info(arg, from_tty) \ | |
674 | (*current_target.to_terminal_info) (arg, from_tty) | |
675 | ||
676 | /* Kill the inferior process. Make it go away. */ | |
677 | ||
678 | #define target_kill() \ | |
679 | (*current_target.to_kill) () | |
680 | ||
681 | /* Load an executable file into the target process. This is expected | |
682 | to not only bring new code into the target process, but also to | |
683 | update GDB's symbol tables to match. */ | |
684 | ||
685 | extern void target_load (char *arg, int from_tty); | |
686 | ||
687 | /* Look up a symbol in the target's symbol table. NAME is the symbol | |
688 | name. ADDRP is a CORE_ADDR * pointing to where the value of the | |
689 | symbol should be returned. The result is 0 if successful, nonzero | |
690 | if the symbol does not exist in the target environment. This | |
691 | function should not call error() if communication with the target | |
692 | is interrupted, since it is called from symbol reading, but should | |
693 | return nonzero, possibly doing a complain(). */ | |
694 | ||
695 | #define target_lookup_symbol(name, addrp) \ | |
696 | (*current_target.to_lookup_symbol) (name, addrp) | |
697 | ||
698 | /* Start an inferior process and set inferior_ptid to its pid. | |
699 | EXEC_FILE is the file to run. | |
700 | ALLARGS is a string containing the arguments to the program. | |
701 | ENV is the environment vector to pass. Errors reported with error(). | |
702 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
703 | ||
704 | #define target_create_inferior(exec_file, args, env, FROM_TTY) \ | |
705 | (*current_target.to_create_inferior) (exec_file, args, env, (FROM_TTY)) | |
706 | ||
707 | ||
708 | /* Some targets (such as ttrace-based HPUX) don't allow us to request | |
709 | notification of inferior events such as fork and vork immediately | |
710 | after the inferior is created. (This because of how gdb gets an | |
711 | inferior created via invoking a shell to do it. In such a scenario, | |
712 | if the shell init file has commands in it, the shell will fork and | |
713 | exec for each of those commands, and we will see each such fork | |
714 | event. Very bad.) | |
715 | ||
716 | Such targets will supply an appropriate definition for this function. */ | |
717 | ||
718 | #define target_post_startup_inferior(ptid) \ | |
719 | (*current_target.to_post_startup_inferior) (ptid) | |
720 | ||
721 | /* On some targets, the sequence of starting up an inferior requires | |
722 | some synchronization between gdb and the new inferior process, PID. */ | |
723 | ||
724 | #define target_acknowledge_created_inferior(pid) \ | |
725 | (*current_target.to_acknowledge_created_inferior) (pid) | |
726 | ||
727 | /* On some targets, we can catch an inferior fork or vfork event when | |
728 | it occurs. These functions insert/remove an already-created | |
729 | catchpoint for such events. */ | |
730 | ||
731 | #define target_insert_fork_catchpoint(pid) \ | |
732 | (*current_target.to_insert_fork_catchpoint) (pid) | |
733 | ||
734 | #define target_remove_fork_catchpoint(pid) \ | |
735 | (*current_target.to_remove_fork_catchpoint) (pid) | |
736 | ||
737 | #define target_insert_vfork_catchpoint(pid) \ | |
738 | (*current_target.to_insert_vfork_catchpoint) (pid) | |
739 | ||
740 | #define target_remove_vfork_catchpoint(pid) \ | |
741 | (*current_target.to_remove_vfork_catchpoint) (pid) | |
742 | ||
743 | /* If the inferior forks or vforks, this function will be called at | |
744 | the next resume in order to perform any bookkeeping and fiddling | |
745 | necessary to continue debugging either the parent or child, as | |
746 | requested, and releasing the other. Information about the fork | |
747 | or vfork event is available via get_last_target_status (). | |
748 | This function returns 1 if the inferior should not be resumed | |
749 | (i.e. there is another event pending). */ | |
750 | ||
751 | int target_follow_fork (int follow_child); | |
752 | ||
753 | /* On some targets, we can catch an inferior exec event when it | |
754 | occurs. These functions insert/remove an already-created | |
755 | catchpoint for such events. */ | |
756 | ||
757 | #define target_insert_exec_catchpoint(pid) \ | |
758 | (*current_target.to_insert_exec_catchpoint) (pid) | |
759 | ||
760 | #define target_remove_exec_catchpoint(pid) \ | |
761 | (*current_target.to_remove_exec_catchpoint) (pid) | |
762 | ||
763 | /* Returns the number of exec events that are reported when a process | |
764 | invokes a flavor of the exec() system call on this target, if exec | |
765 | events are being reported. */ | |
766 | ||
767 | #define target_reported_exec_events_per_exec_call() \ | |
768 | (*current_target.to_reported_exec_events_per_exec_call) () | |
769 | ||
770 | /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the | |
771 | exit code of PID, if any. */ | |
772 | ||
773 | #define target_has_exited(pid,wait_status,exit_status) \ | |
774 | (*current_target.to_has_exited) (pid,wait_status,exit_status) | |
775 | ||
776 | /* The debugger has completed a blocking wait() call. There is now | |
777 | some process event that must be processed. This function should | |
778 | be defined by those targets that require the debugger to perform | |
779 | cleanup or internal state changes in response to the process event. */ | |
780 | ||
781 | /* The inferior process has died. Do what is right. */ | |
782 | ||
783 | #define target_mourn_inferior() \ | |
784 | (*current_target.to_mourn_inferior) () | |
785 | ||
786 | /* Does target have enough data to do a run or attach command? */ | |
787 | ||
788 | #define target_can_run(t) \ | |
789 | ((t)->to_can_run) () | |
790 | ||
791 | /* post process changes to signal handling in the inferior. */ | |
792 | ||
793 | #define target_notice_signals(ptid) \ | |
794 | (*current_target.to_notice_signals) (ptid) | |
795 | ||
796 | /* Check to see if a thread is still alive. */ | |
797 | ||
798 | #define target_thread_alive(ptid) \ | |
799 | (*current_target.to_thread_alive) (ptid) | |
800 | ||
801 | /* Query for new threads and add them to the thread list. */ | |
802 | ||
803 | #define target_find_new_threads() \ | |
804 | (*current_target.to_find_new_threads) (); \ | |
805 | ||
806 | /* Make target stop in a continuable fashion. (For instance, under | |
807 | Unix, this should act like SIGSTOP). This function is normally | |
808 | used by GUIs to implement a stop button. */ | |
809 | ||
810 | #define target_stop current_target.to_stop | |
811 | ||
812 | /* Send the specified COMMAND to the target's monitor | |
813 | (shell,interpreter) for execution. The result of the query is | |
814 | placed in OUTBUF. */ | |
815 | ||
816 | #define target_rcmd(command, outbuf) \ | |
817 | (*current_target.to_rcmd) (command, outbuf) | |
818 | ||
819 | ||
820 | /* Get the symbol information for a breakpointable routine called when | |
821 | an exception event occurs. | |
822 | Intended mainly for C++, and for those | |
823 | platforms/implementations where such a callback mechanism is available, | |
824 | e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support | |
825 | different mechanisms for debugging exceptions. */ | |
826 | ||
827 | #define target_enable_exception_callback(kind, enable) \ | |
828 | (*current_target.to_enable_exception_callback) (kind, enable) | |
829 | ||
830 | /* Get the current exception event kind -- throw or catch, etc. */ | |
831 | ||
832 | #define target_get_current_exception_event() \ | |
833 | (*current_target.to_get_current_exception_event) () | |
834 | ||
835 | /* Does the target include all of memory, or only part of it? This | |
836 | determines whether we look up the target chain for other parts of | |
837 | memory if this target can't satisfy a request. */ | |
838 | ||
839 | #define target_has_all_memory \ | |
840 | (current_target.to_has_all_memory) | |
841 | ||
842 | /* Does the target include memory? (Dummy targets don't.) */ | |
843 | ||
844 | #define target_has_memory \ | |
845 | (current_target.to_has_memory) | |
846 | ||
847 | /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until | |
848 | we start a process.) */ | |
849 | ||
850 | #define target_has_stack \ | |
851 | (current_target.to_has_stack) | |
852 | ||
853 | /* Does the target have registers? (Exec files don't.) */ | |
854 | ||
855 | #define target_has_registers \ | |
856 | (current_target.to_has_registers) | |
857 | ||
858 | /* Does the target have execution? Can we make it jump (through | |
859 | hoops), or pop its stack a few times? FIXME: If this is to work that | |
860 | way, it needs to check whether an inferior actually exists. | |
861 | remote-udi.c and probably other targets can be the current target | |
862 | when the inferior doesn't actually exist at the moment. Right now | |
863 | this just tells us whether this target is *capable* of execution. */ | |
864 | ||
865 | #define target_has_execution \ | |
866 | (current_target.to_has_execution) | |
867 | ||
868 | /* Can the target support the debugger control of thread execution? | |
869 | a) Can it lock the thread scheduler? | |
870 | b) Can it switch the currently running thread? */ | |
871 | ||
872 | #define target_can_lock_scheduler \ | |
873 | (current_target.to_has_thread_control & tc_schedlock) | |
874 | ||
875 | #define target_can_switch_threads \ | |
876 | (current_target.to_has_thread_control & tc_switch) | |
877 | ||
878 | /* Can the target support asynchronous execution? */ | |
879 | #define target_can_async_p() (current_target.to_can_async_p ()) | |
880 | ||
881 | /* Is the target in asynchronous execution mode? */ | |
882 | #define target_is_async_p() (current_target.to_is_async_p()) | |
883 | ||
884 | /* Put the target in async mode with the specified callback function. */ | |
885 | #define target_async(CALLBACK,CONTEXT) \ | |
886 | (current_target.to_async((CALLBACK), (CONTEXT))) | |
887 | ||
888 | /* This is to be used ONLY within call_function_by_hand(). It provides | |
889 | a workaround, to have inferior function calls done in sychronous | |
890 | mode, even though the target is asynchronous. After | |
891 | target_async_mask(0) is called, calls to target_can_async_p() will | |
892 | return FALSE , so that target_resume() will not try to start the | |
893 | target asynchronously. After the inferior stops, we IMMEDIATELY | |
894 | restore the previous nature of the target, by calling | |
895 | target_async_mask(1). After that, target_can_async_p() will return | |
896 | TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. | |
897 | ||
898 | FIXME ezannoni 1999-12-13: we won't need this once we move | |
899 | the turning async on and off to the single execution commands, | |
900 | from where it is done currently, in remote_resume(). */ | |
901 | ||
902 | #define target_async_mask_value \ | |
903 | (current_target.to_async_mask_value) | |
904 | ||
905 | extern int target_async_mask (int mask); | |
906 | ||
907 | /* Converts a process id to a string. Usually, the string just contains | |
908 | `process xyz', but on some systems it may contain | |
909 | `process xyz thread abc'. */ | |
910 | ||
911 | #undef target_pid_to_str | |
912 | #define target_pid_to_str(PID) current_target.to_pid_to_str (PID) | |
913 | ||
914 | #ifndef target_tid_to_str | |
915 | #define target_tid_to_str(PID) \ | |
916 | target_pid_to_str (PID) | |
917 | extern char *normal_pid_to_str (ptid_t ptid); | |
918 | #endif | |
919 | ||
920 | /* Return a short string describing extra information about PID, | |
921 | e.g. "sleeping", "runnable", "running on LWP 3". Null return value | |
922 | is okay. */ | |
923 | ||
924 | #define target_extra_thread_info(TP) \ | |
925 | (current_target.to_extra_thread_info (TP)) | |
926 | ||
927 | /* | |
928 | * New Objfile Event Hook: | |
929 | * | |
930 | * Sometimes a GDB component wants to get notified whenever a new | |
931 | * objfile is loaded. Mainly this is used by thread-debugging | |
932 | * implementations that need to know when symbols for the target | |
933 | * thread implemenation are available. | |
934 | * | |
935 | * The old way of doing this is to define a macro 'target_new_objfile' | |
936 | * that points to the function that you want to be called on every | |
937 | * objfile/shlib load. | |
938 | ||
939 | The new way is to grab the function pointer, | |
940 | 'deprecated_target_new_objfile_hook', and point it to the function | |
941 | that you want to be called on every objfile/shlib load. | |
942 | ||
943 | If multiple clients are willing to be cooperative, they can each | |
944 | save a pointer to the previous value of | |
945 | deprecated_target_new_objfile_hook before modifying it, and arrange | |
946 | for their function to call the previous function in the chain. In | |
947 | that way, multiple clients can receive this notification (something | |
948 | like with signal handlers). */ | |
949 | ||
950 | extern void (*deprecated_target_new_objfile_hook) (struct objfile *); | |
951 | ||
952 | #ifndef target_pid_or_tid_to_str | |
953 | #define target_pid_or_tid_to_str(ID) \ | |
954 | target_pid_to_str (ID) | |
955 | #endif | |
956 | ||
957 | /* Attempts to find the pathname of the executable file | |
958 | that was run to create a specified process. | |
959 | ||
960 | The process PID must be stopped when this operation is used. | |
961 | ||
962 | If the executable file cannot be determined, NULL is returned. | |
963 | ||
964 | Else, a pointer to a character string containing the pathname | |
965 | is returned. This string should be copied into a buffer by | |
966 | the client if the string will not be immediately used, or if | |
967 | it must persist. */ | |
968 | ||
969 | #define target_pid_to_exec_file(pid) \ | |
970 | (current_target.to_pid_to_exec_file) (pid) | |
971 | ||
972 | /* | |
973 | * Iterator function for target memory regions. | |
974 | * Calls a callback function once for each memory region 'mapped' | |
975 | * in the child process. Defined as a simple macro rather than | |
976 | * as a function macro so that it can be tested for nullity. | |
977 | */ | |
978 | ||
979 | #define target_find_memory_regions(FUNC, DATA) \ | |
980 | (current_target.to_find_memory_regions) (FUNC, DATA) | |
981 | ||
982 | /* | |
983 | * Compose corefile .note section. | |
984 | */ | |
985 | ||
986 | #define target_make_corefile_notes(BFD, SIZE_P) \ | |
987 | (current_target.to_make_corefile_notes) (BFD, SIZE_P) | |
988 | ||
989 | /* Thread-local values. */ | |
990 | #define target_get_thread_local_address \ | |
991 | (current_target.to_get_thread_local_address) | |
992 | #define target_get_thread_local_address_p() \ | |
993 | (target_get_thread_local_address != NULL) | |
994 | ||
995 | /* Hook to call target dependent code just after inferior target process has | |
996 | started. */ | |
997 | ||
998 | #ifndef TARGET_CREATE_INFERIOR_HOOK | |
999 | #define TARGET_CREATE_INFERIOR_HOOK(PID) | |
1000 | #endif | |
1001 | ||
1002 | /* Hardware watchpoint interfaces. */ | |
1003 | ||
1004 | /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or | |
1005 | write). */ | |
1006 | ||
1007 | #ifndef STOPPED_BY_WATCHPOINT | |
1008 | #define STOPPED_BY_WATCHPOINT(w) \ | |
1009 | (*current_target.to_stopped_by_watchpoint) () | |
1010 | #endif | |
1011 | ||
1012 | /* Non-zero if we have continuable watchpoints */ | |
1013 | ||
1014 | #ifndef HAVE_CONTINUABLE_WATCHPOINT | |
1015 | #define HAVE_CONTINUABLE_WATCHPOINT \ | |
1016 | (current_target.to_have_continuable_watchpoint) | |
1017 | #endif | |
1018 | ||
1019 | /* Provide defaults for hardware watchpoint functions. */ | |
1020 | ||
1021 | /* If the *_hw_beakpoint functions have not been defined | |
1022 | elsewhere use the definitions in the target vector. */ | |
1023 | ||
1024 | /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is | |
1025 | one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or | |
1026 | bp_hardware_breakpoint. CNT is the number of such watchpoints used so far | |
1027 | (including this one?). OTHERTYPE is who knows what... */ | |
1028 | ||
1029 | #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT | |
1030 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \ | |
1031 | (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE); | |
1032 | #endif | |
1033 | ||
1034 | #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT) | |
1035 | #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \ | |
1036 | (*current_target.to_region_size_ok_for_hw_watchpoint) (byte_count) | |
1037 | #endif | |
1038 | ||
1039 | ||
1040 | /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 | |
1041 | for write, 1 for read, and 2 for read/write accesses. Returns 0 for | |
1042 | success, non-zero for failure. */ | |
1043 | ||
1044 | #ifndef target_insert_watchpoint | |
1045 | #define target_insert_watchpoint(addr, len, type) \ | |
1046 | (*current_target.to_insert_watchpoint) (addr, len, type) | |
1047 | ||
1048 | #define target_remove_watchpoint(addr, len, type) \ | |
1049 | (*current_target.to_remove_watchpoint) (addr, len, type) | |
1050 | #endif | |
1051 | ||
1052 | #ifndef target_insert_hw_breakpoint | |
1053 | #define target_insert_hw_breakpoint(addr, save) \ | |
1054 | (*current_target.to_insert_hw_breakpoint) (addr, save) | |
1055 | ||
1056 | #define target_remove_hw_breakpoint(addr, save) \ | |
1057 | (*current_target.to_remove_hw_breakpoint) (addr, save) | |
1058 | #endif | |
1059 | ||
1060 | extern int target_stopped_data_address_p (struct target_ops *); | |
1061 | ||
1062 | #ifndef target_stopped_data_address | |
1063 | #define target_stopped_data_address(target, x) \ | |
1064 | (*target.to_stopped_data_address) (target, x) | |
1065 | #else | |
1066 | /* Horrible hack to get around existing macros :-(. */ | |
1067 | #define target_stopped_data_address_p(CURRENT_TARGET) (1) | |
1068 | #endif | |
1069 | ||
1070 | /* This will only be defined by a target that supports catching vfork events, | |
1071 | such as HP-UX. | |
1072 | ||
1073 | On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked | |
1074 | child process after it has exec'd, causes the parent process to resume as | |
1075 | well. To prevent the parent from running spontaneously, such targets should | |
1076 | define this to a function that prevents that from happening. */ | |
1077 | #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED) | |
1078 | #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0) | |
1079 | #endif | |
1080 | ||
1081 | /* This will only be defined by a target that supports catching vfork events, | |
1082 | such as HP-UX. | |
1083 | ||
1084 | On some targets (such as HP-UX 10.20 and earlier), a newly vforked child | |
1085 | process must be resumed when it delivers its exec event, before the parent | |
1086 | vfork event will be delivered to us. */ | |
1087 | ||
1088 | #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK) | |
1089 | #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0) | |
1090 | #endif | |
1091 | ||
1092 | /* Routines for maintenance of the target structures... | |
1093 | ||
1094 | add_target: Add a target to the list of all possible targets. | |
1095 | ||
1096 | push_target: Make this target the top of the stack of currently used | |
1097 | targets, within its particular stratum of the stack. Result | |
1098 | is 0 if now atop the stack, nonzero if not on top (maybe | |
1099 | should warn user). | |
1100 | ||
1101 | unpush_target: Remove this from the stack of currently used targets, | |
1102 | no matter where it is on the list. Returns 0 if no | |
1103 | change, 1 if removed from stack. | |
1104 | ||
1105 | pop_target: Remove the top thing on the stack of current targets. */ | |
1106 | ||
1107 | extern void add_target (struct target_ops *); | |
1108 | ||
1109 | extern int push_target (struct target_ops *); | |
1110 | ||
1111 | extern int unpush_target (struct target_ops *); | |
1112 | ||
1113 | extern void target_preopen (int); | |
1114 | ||
1115 | extern void pop_target (void); | |
1116 | ||
1117 | /* Struct section_table maps address ranges to file sections. It is | |
1118 | mostly used with BFD files, but can be used without (e.g. for handling | |
1119 | raw disks, or files not in formats handled by BFD). */ | |
1120 | ||
1121 | struct section_table | |
1122 | { | |
1123 | CORE_ADDR addr; /* Lowest address in section */ | |
1124 | CORE_ADDR endaddr; /* 1+highest address in section */ | |
1125 | ||
1126 | struct bfd_section *the_bfd_section; | |
1127 | ||
1128 | bfd *bfd; /* BFD file pointer */ | |
1129 | }; | |
1130 | ||
1131 | /* Return the "section" containing the specified address. */ | |
1132 | struct section_table *target_section_by_addr (struct target_ops *target, | |
1133 | CORE_ADDR addr); | |
1134 | ||
1135 | ||
1136 | /* From mem-break.c */ | |
1137 | ||
1138 | extern int memory_remove_breakpoint (CORE_ADDR, gdb_byte *); | |
1139 | ||
1140 | extern int memory_insert_breakpoint (CORE_ADDR, gdb_byte *); | |
1141 | ||
1142 | extern int default_memory_remove_breakpoint (CORE_ADDR, gdb_byte *); | |
1143 | ||
1144 | extern int default_memory_insert_breakpoint (CORE_ADDR, gdb_byte *); | |
1145 | ||
1146 | ||
1147 | /* From target.c */ | |
1148 | ||
1149 | extern void initialize_targets (void); | |
1150 | ||
1151 | extern void noprocess (void); | |
1152 | ||
1153 | extern void find_default_attach (char *, int); | |
1154 | ||
1155 | extern void find_default_create_inferior (char *, char *, char **, int); | |
1156 | ||
1157 | extern struct target_ops *find_run_target (void); | |
1158 | ||
1159 | extern struct target_ops *find_core_target (void); | |
1160 | ||
1161 | extern struct target_ops *find_target_beneath (struct target_ops *); | |
1162 | ||
1163 | extern int target_resize_to_sections (struct target_ops *target, | |
1164 | int num_added); | |
1165 | ||
1166 | extern void remove_target_sections (bfd *abfd); | |
1167 | ||
1168 | \f | |
1169 | /* Stuff that should be shared among the various remote targets. */ | |
1170 | ||
1171 | /* Debugging level. 0 is off, and non-zero values mean to print some debug | |
1172 | information (higher values, more information). */ | |
1173 | extern int remote_debug; | |
1174 | ||
1175 | /* Speed in bits per second, or -1 which means don't mess with the speed. */ | |
1176 | extern int baud_rate; | |
1177 | /* Timeout limit for response from target. */ | |
1178 | extern int remote_timeout; | |
1179 | ||
1180 | \f | |
1181 | /* Functions for helping to write a native target. */ | |
1182 | ||
1183 | /* This is for native targets which use a unix/POSIX-style waitstatus. */ | |
1184 | extern void store_waitstatus (struct target_waitstatus *, int); | |
1185 | ||
1186 | /* Predicate to target_signal_to_host(). Return non-zero if the enum | |
1187 | targ_signal SIGNO has an equivalent ``host'' representation. */ | |
1188 | /* FIXME: cagney/1999-11-22: The name below was chosen in preference | |
1189 | to the shorter target_signal_p() because it is far less ambigious. | |
1190 | In this context ``target_signal'' refers to GDB's internal | |
1191 | representation of the target's set of signals while ``host signal'' | |
1192 | refers to the target operating system's signal. Confused? */ | |
1193 | ||
1194 | extern int target_signal_to_host_p (enum target_signal signo); | |
1195 | ||
1196 | /* Convert between host signal numbers and enum target_signal's. | |
1197 | target_signal_to_host() returns 0 and prints a warning() on GDB's | |
1198 | console if SIGNO has no equivalent host representation. */ | |
1199 | /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is | |
1200 | refering to the target operating system's signal numbering. | |
1201 | Similarly, ``enum target_signal'' is named incorrectly, ``enum | |
1202 | gdb_signal'' would probably be better as it is refering to GDB's | |
1203 | internal representation of a target operating system's signal. */ | |
1204 | ||
1205 | extern enum target_signal target_signal_from_host (int); | |
1206 | extern int target_signal_to_host (enum target_signal); | |
1207 | ||
1208 | /* Convert from a number used in a GDB command to an enum target_signal. */ | |
1209 | extern enum target_signal target_signal_from_command (int); | |
1210 | ||
1211 | /* Any target can call this to switch to remote protocol (in remote.c). */ | |
1212 | extern void push_remote_target (char *name, int from_tty); | |
1213 | \f | |
1214 | /* Imported from machine dependent code */ | |
1215 | ||
1216 | /* Blank target vector entries are initialized to target_ignore. */ | |
1217 | void target_ignore (void); | |
1218 | ||
1219 | extern struct target_ops deprecated_child_ops; | |
1220 | ||
1221 | #endif /* !defined (TARGET_H) */ |