]>
Commit | Line | Data |
---|---|---|
1 | /* Interface between GDB and target environments, including files and processes | |
2 | ||
3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, | |
4 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 | |
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 3 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, see <http://www.gnu.org/licenses/>. */ | |
23 | ||
24 | #if !defined (TARGET_H) | |
25 | #define TARGET_H | |
26 | ||
27 | struct objfile; | |
28 | struct ui_file; | |
29 | struct mem_attrib; | |
30 | struct target_ops; | |
31 | struct bp_target_info; | |
32 | struct regcache; | |
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 | #include "vec.h" | |
58 | ||
59 | enum strata | |
60 | { | |
61 | dummy_stratum, /* The lowest of the low */ | |
62 | file_stratum, /* Executable files, etc */ | |
63 | core_stratum, /* Core dump files */ | |
64 | process_stratum, /* Executing processes */ | |
65 | thread_stratum /* Executing threads */ | |
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 | }; | |
73 | ||
74 | /* Stuff for target_wait. */ | |
75 | ||
76 | /* Generally, what has the program done? */ | |
77 | enum target_waitkind | |
78 | { | |
79 | /* The program has exited. The exit status is in value.integer. */ | |
80 | TARGET_WAITKIND_EXITED, | |
81 | ||
82 | /* The program has stopped with a signal. Which signal is in | |
83 | value.sig. */ | |
84 | TARGET_WAITKIND_STOPPED, | |
85 | ||
86 | /* The program has terminated with a signal. Which signal is in | |
87 | value.sig. */ | |
88 | TARGET_WAITKIND_SIGNALLED, | |
89 | ||
90 | /* The program is letting us know that it dynamically loaded something | |
91 | (e.g. it called load(2) on AIX). */ | |
92 | TARGET_WAITKIND_LOADED, | |
93 | ||
94 | /* The program has forked. A "related" process' PTID is in | |
95 | value.related_pid. I.e., if the child forks, value.related_pid | |
96 | is the parent's ID. */ | |
97 | ||
98 | TARGET_WAITKIND_FORKED, | |
99 | ||
100 | /* The program has vforked. A "related" process's PTID is in | |
101 | value.related_pid. */ | |
102 | ||
103 | TARGET_WAITKIND_VFORKED, | |
104 | ||
105 | /* The program has exec'ed a new executable file. The new file's | |
106 | pathname is pointed to by value.execd_pathname. */ | |
107 | ||
108 | TARGET_WAITKIND_EXECD, | |
109 | ||
110 | /* The program has entered or returned from a system call. On | |
111 | HP-UX, this is used in the hardware watchpoint implementation. | |
112 | The syscall's unique integer ID number is in value.syscall_id */ | |
113 | ||
114 | TARGET_WAITKIND_SYSCALL_ENTRY, | |
115 | TARGET_WAITKIND_SYSCALL_RETURN, | |
116 | ||
117 | /* Nothing happened, but we stopped anyway. This perhaps should be handled | |
118 | within target_wait, but I'm not sure target_wait should be resuming the | |
119 | inferior. */ | |
120 | TARGET_WAITKIND_SPURIOUS, | |
121 | ||
122 | /* An event has occured, but we should wait again. | |
123 | Remote_async_wait() returns this when there is an event | |
124 | on the inferior, but the rest of the world is not interested in | |
125 | it. The inferior has not stopped, but has just sent some output | |
126 | to the console, for instance. In this case, we want to go back | |
127 | to the event loop and wait there for another event from the | |
128 | inferior, rather than being stuck in the remote_async_wait() | |
129 | function. This way the event loop is responsive to other events, | |
130 | like for instance the user typing. */ | |
131 | TARGET_WAITKIND_IGNORE, | |
132 | ||
133 | /* The target has run out of history information, | |
134 | and cannot run backward any further. */ | |
135 | TARGET_WAITKIND_NO_HISTORY | |
136 | }; | |
137 | ||
138 | struct target_waitstatus | |
139 | { | |
140 | enum target_waitkind kind; | |
141 | ||
142 | /* Forked child pid, execd pathname, exit status or signal number. */ | |
143 | union | |
144 | { | |
145 | int integer; | |
146 | enum target_signal sig; | |
147 | ptid_t related_pid; | |
148 | char *execd_pathname; | |
149 | int syscall_id; | |
150 | } | |
151 | value; | |
152 | }; | |
153 | ||
154 | /* Return a pretty printed form of target_waitstatus. | |
155 | Space for the result is malloc'd, caller must free. */ | |
156 | extern char *target_waitstatus_to_string (const struct target_waitstatus *); | |
157 | ||
158 | /* Possible types of events that the inferior handler will have to | |
159 | deal with. */ | |
160 | enum inferior_event_type | |
161 | { | |
162 | /* There is a request to quit the inferior, abandon it. */ | |
163 | INF_QUIT_REQ, | |
164 | /* Process a normal inferior event which will result in target_wait | |
165 | being called. */ | |
166 | INF_REG_EVENT, | |
167 | /* Deal with an error on the inferior. */ | |
168 | INF_ERROR, | |
169 | /* We are called because a timer went off. */ | |
170 | INF_TIMER, | |
171 | /* We are called to do stuff after the inferior stops. */ | |
172 | INF_EXEC_COMPLETE, | |
173 | /* We are called to do some stuff after the inferior stops, but we | |
174 | are expected to reenter the proceed() and | |
175 | handle_inferior_event() functions. This is used only in case of | |
176 | 'step n' like commands. */ | |
177 | INF_EXEC_CONTINUE | |
178 | }; | |
179 | ||
180 | /* Return the string for a signal. */ | |
181 | extern const char *target_signal_to_string (enum target_signal); | |
182 | ||
183 | /* Return the name (SIGHUP, etc.) for a signal. */ | |
184 | extern const char *target_signal_to_name (enum target_signal); | |
185 | ||
186 | /* Given a name (SIGHUP, etc.), return its signal. */ | |
187 | enum target_signal target_signal_from_name (const char *); | |
188 | \f | |
189 | /* Target objects which can be transfered using target_read, | |
190 | target_write, et cetera. */ | |
191 | ||
192 | enum target_object | |
193 | { | |
194 | /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */ | |
195 | TARGET_OBJECT_AVR, | |
196 | /* SPU target specific transfer. See "spu-tdep.c". */ | |
197 | TARGET_OBJECT_SPU, | |
198 | /* Transfer up-to LEN bytes of memory starting at OFFSET. */ | |
199 | TARGET_OBJECT_MEMORY, | |
200 | /* Memory, avoiding GDB's data cache and trusting the executable. | |
201 | Target implementations of to_xfer_partial never need to handle | |
202 | this object, and most callers should not use it. */ | |
203 | TARGET_OBJECT_RAW_MEMORY, | |
204 | /* Kernel Unwind Table. See "ia64-tdep.c". */ | |
205 | TARGET_OBJECT_UNWIND_TABLE, | |
206 | /* Transfer auxilliary vector. */ | |
207 | TARGET_OBJECT_AUXV, | |
208 | /* StackGhost cookie. See "sparc-tdep.c". */ | |
209 | TARGET_OBJECT_WCOOKIE, | |
210 | /* Target memory map in XML format. */ | |
211 | TARGET_OBJECT_MEMORY_MAP, | |
212 | /* Flash memory. This object can be used to write contents to | |
213 | a previously erased flash memory. Using it without erasing | |
214 | flash can have unexpected results. Addresses are physical | |
215 | address on target, and not relative to flash start. */ | |
216 | TARGET_OBJECT_FLASH, | |
217 | /* Available target-specific features, e.g. registers and coprocessors. | |
218 | See "target-descriptions.c". ANNEX should never be empty. */ | |
219 | TARGET_OBJECT_AVAILABLE_FEATURES, | |
220 | /* Currently loaded libraries, in XML format. */ | |
221 | TARGET_OBJECT_LIBRARIES, | |
222 | /* Get OS specific data. The ANNEX specifies the type (running | |
223 | processes, etc.). */ | |
224 | TARGET_OBJECT_OSDATA, | |
225 | /* Extra signal info. Usually the contents of `siginfo_t' on unix | |
226 | platforms. */ | |
227 | TARGET_OBJECT_SIGNAL_INFO, | |
228 | /* Possible future objects: TARGET_OBJECT_FILE, ... */ | |
229 | }; | |
230 | ||
231 | /* Request that OPS transfer up to LEN 8-bit bytes of the target's | |
232 | OBJECT. The OFFSET, for a seekable object, specifies the | |
233 | starting point. The ANNEX can be used to provide additional | |
234 | data-specific information to the target. | |
235 | ||
236 | Return the number of bytes actually transfered, or -1 if the | |
237 | transfer is not supported or otherwise fails. Return of a positive | |
238 | value less than LEN indicates that no further transfer is possible. | |
239 | Unlike the raw to_xfer_partial interface, callers of these | |
240 | functions do not need to retry partial transfers. */ | |
241 | ||
242 | extern LONGEST target_read (struct target_ops *ops, | |
243 | enum target_object object, | |
244 | const char *annex, gdb_byte *buf, | |
245 | ULONGEST offset, LONGEST len); | |
246 | ||
247 | extern LONGEST target_read_until_error (struct target_ops *ops, | |
248 | enum target_object object, | |
249 | const char *annex, gdb_byte *buf, | |
250 | ULONGEST offset, LONGEST len); | |
251 | ||
252 | extern LONGEST target_write (struct target_ops *ops, | |
253 | enum target_object object, | |
254 | const char *annex, const gdb_byte *buf, | |
255 | ULONGEST offset, LONGEST len); | |
256 | ||
257 | /* Similar to target_write, except that it also calls PROGRESS with | |
258 | the number of bytes written and the opaque BATON after every | |
259 | successful partial write (and before the first write). This is | |
260 | useful for progress reporting and user interaction while writing | |
261 | data. To abort the transfer, the progress callback can throw an | |
262 | exception. */ | |
263 | ||
264 | LONGEST target_write_with_progress (struct target_ops *ops, | |
265 | enum target_object object, | |
266 | const char *annex, const gdb_byte *buf, | |
267 | ULONGEST offset, LONGEST len, | |
268 | void (*progress) (ULONGEST, void *), | |
269 | void *baton); | |
270 | ||
271 | /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will | |
272 | be read using OPS. The return value will be -1 if the transfer | |
273 | fails or is not supported; 0 if the object is empty; or the length | |
274 | of the object otherwise. If a positive value is returned, a | |
275 | sufficiently large buffer will be allocated using xmalloc and | |
276 | returned in *BUF_P containing the contents of the object. | |
277 | ||
278 | This method should be used for objects sufficiently small to store | |
279 | in a single xmalloc'd buffer, when no fixed bound on the object's | |
280 | size is known in advance. Don't try to read TARGET_OBJECT_MEMORY | |
281 | through this function. */ | |
282 | ||
283 | extern LONGEST target_read_alloc (struct target_ops *ops, | |
284 | enum target_object object, | |
285 | const char *annex, gdb_byte **buf_p); | |
286 | ||
287 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
288 | returned as a string, allocated using xmalloc. If an error occurs | |
289 | or the transfer is unsupported, NULL is returned. Empty objects | |
290 | are returned as allocated but empty strings. A warning is issued | |
291 | if the result contains any embedded NUL bytes. */ | |
292 | ||
293 | extern char *target_read_stralloc (struct target_ops *ops, | |
294 | enum target_object object, | |
295 | const char *annex); | |
296 | ||
297 | /* Wrappers to target read/write that perform memory transfers. They | |
298 | throw an error if the memory transfer fails. | |
299 | ||
300 | NOTE: cagney/2003-10-23: The naming schema is lifted from | |
301 | "frame.h". The parameter order is lifted from get_frame_memory, | |
302 | which in turn lifted it from read_memory. */ | |
303 | ||
304 | extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr, | |
305 | gdb_byte *buf, LONGEST len); | |
306 | extern ULONGEST get_target_memory_unsigned (struct target_ops *ops, | |
307 | CORE_ADDR addr, int len); | |
308 | \f | |
309 | struct thread_info; /* fwd decl for parameter list below: */ | |
310 | ||
311 | struct target_ops | |
312 | { | |
313 | struct target_ops *beneath; /* To the target under this one. */ | |
314 | char *to_shortname; /* Name this target type */ | |
315 | char *to_longname; /* Name for printing */ | |
316 | char *to_doc; /* Documentation. Does not include trailing | |
317 | newline, and starts with a one-line descrip- | |
318 | tion (probably similar to to_longname). */ | |
319 | /* Per-target scratch pad. */ | |
320 | void *to_data; | |
321 | /* The open routine takes the rest of the parameters from the | |
322 | command, and (if successful) pushes a new target onto the | |
323 | stack. Targets should supply this routine, if only to provide | |
324 | an error message. */ | |
325 | void (*to_open) (char *, int); | |
326 | /* Old targets with a static target vector provide "to_close". | |
327 | New re-entrant targets provide "to_xclose" and that is expected | |
328 | to xfree everything (including the "struct target_ops"). */ | |
329 | void (*to_xclose) (struct target_ops *targ, int quitting); | |
330 | void (*to_close) (int); | |
331 | void (*to_attach) (struct target_ops *ops, char *, int); | |
332 | void (*to_post_attach) (int); | |
333 | void (*to_detach) (struct target_ops *ops, char *, int); | |
334 | void (*to_disconnect) (struct target_ops *, char *, int); | |
335 | void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal); | |
336 | ptid_t (*to_wait) (struct target_ops *, | |
337 | ptid_t, struct target_waitstatus *); | |
338 | void (*to_fetch_registers) (struct target_ops *, struct regcache *, int); | |
339 | void (*to_store_registers) (struct target_ops *, struct regcache *, int); | |
340 | void (*to_prepare_to_store) (struct regcache *); | |
341 | ||
342 | /* Transfer LEN bytes of memory between GDB address MYADDR and | |
343 | target address MEMADDR. If WRITE, transfer them to the target, else | |
344 | transfer them from the target. TARGET is the target from which we | |
345 | get this function. | |
346 | ||
347 | Return value, N, is one of the following: | |
348 | ||
349 | 0 means that we can't handle this. If errno has been set, it is the | |
350 | error which prevented us from doing it (FIXME: What about bfd_error?). | |
351 | ||
352 | positive (call it N) means that we have transferred N bytes | |
353 | starting at MEMADDR. We might be able to handle more bytes | |
354 | beyond this length, but no promises. | |
355 | ||
356 | negative (call its absolute value N) means that we cannot | |
357 | transfer right at MEMADDR, but we could transfer at least | |
358 | something at MEMADDR + N. | |
359 | ||
360 | NOTE: cagney/2004-10-01: This has been entirely superseeded by | |
361 | to_xfer_partial and inferior inheritance. */ | |
362 | ||
363 | int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr, | |
364 | int len, int write, | |
365 | struct mem_attrib *attrib, | |
366 | struct target_ops *target); | |
367 | ||
368 | void (*to_files_info) (struct target_ops *); | |
369 | int (*to_insert_breakpoint) (struct bp_target_info *); | |
370 | int (*to_remove_breakpoint) (struct bp_target_info *); | |
371 | int (*to_can_use_hw_breakpoint) (int, int, int); | |
372 | int (*to_insert_hw_breakpoint) (struct bp_target_info *); | |
373 | int (*to_remove_hw_breakpoint) (struct bp_target_info *); | |
374 | int (*to_remove_watchpoint) (CORE_ADDR, int, int); | |
375 | int (*to_insert_watchpoint) (CORE_ADDR, int, int); | |
376 | int (*to_stopped_by_watchpoint) (void); | |
377 | int to_have_steppable_watchpoint; | |
378 | int to_have_continuable_watchpoint; | |
379 | int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *); | |
380 | int (*to_watchpoint_addr_within_range) (struct target_ops *, | |
381 | CORE_ADDR, CORE_ADDR, int); | |
382 | int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int); | |
383 | void (*to_terminal_init) (void); | |
384 | void (*to_terminal_inferior) (void); | |
385 | void (*to_terminal_ours_for_output) (void); | |
386 | void (*to_terminal_ours) (void); | |
387 | void (*to_terminal_save_ours) (void); | |
388 | void (*to_terminal_info) (char *, int); | |
389 | void (*to_kill) (void); | |
390 | void (*to_load) (char *, int); | |
391 | int (*to_lookup_symbol) (char *, CORE_ADDR *); | |
392 | void (*to_create_inferior) (struct target_ops *, | |
393 | char *, char *, char **, int); | |
394 | void (*to_post_startup_inferior) (ptid_t); | |
395 | void (*to_acknowledge_created_inferior) (int); | |
396 | void (*to_insert_fork_catchpoint) (int); | |
397 | int (*to_remove_fork_catchpoint) (int); | |
398 | void (*to_insert_vfork_catchpoint) (int); | |
399 | int (*to_remove_vfork_catchpoint) (int); | |
400 | int (*to_follow_fork) (struct target_ops *, int); | |
401 | void (*to_insert_exec_catchpoint) (int); | |
402 | int (*to_remove_exec_catchpoint) (int); | |
403 | int (*to_has_exited) (int, int, int *); | |
404 | void (*to_mourn_inferior) (struct target_ops *); | |
405 | int (*to_can_run) (void); | |
406 | void (*to_notice_signals) (ptid_t ptid); | |
407 | int (*to_thread_alive) (struct target_ops *, ptid_t ptid); | |
408 | void (*to_find_new_threads) (struct target_ops *); | |
409 | char *(*to_pid_to_str) (struct target_ops *, ptid_t); | |
410 | char *(*to_extra_thread_info) (struct thread_info *); | |
411 | void (*to_stop) (ptid_t); | |
412 | void (*to_rcmd) (char *command, struct ui_file *output); | |
413 | char *(*to_pid_to_exec_file) (int pid); | |
414 | void (*to_log_command) (const char *); | |
415 | enum strata to_stratum; | |
416 | int to_has_all_memory; | |
417 | int to_has_memory; | |
418 | int to_has_stack; | |
419 | int to_has_registers; | |
420 | int to_has_execution; | |
421 | int to_has_thread_control; /* control thread execution */ | |
422 | int to_attach_no_wait; | |
423 | struct section_table | |
424 | *to_sections; | |
425 | struct section_table | |
426 | *to_sections_end; | |
427 | /* ASYNC target controls */ | |
428 | int (*to_can_async_p) (void); | |
429 | int (*to_is_async_p) (void); | |
430 | void (*to_async) (void (*) (enum inferior_event_type, void *), void *); | |
431 | int (*to_async_mask) (int); | |
432 | int (*to_supports_non_stop) (void); | |
433 | int (*to_find_memory_regions) (int (*) (CORE_ADDR, | |
434 | unsigned long, | |
435 | int, int, int, | |
436 | void *), | |
437 | void *); | |
438 | char * (*to_make_corefile_notes) (bfd *, int *); | |
439 | ||
440 | /* Return the thread-local address at OFFSET in the | |
441 | thread-local storage for the thread PTID and the shared library | |
442 | or executable file given by OBJFILE. If that block of | |
443 | thread-local storage hasn't been allocated yet, this function | |
444 | may return an error. */ | |
445 | CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops, | |
446 | ptid_t ptid, | |
447 | CORE_ADDR load_module_addr, | |
448 | CORE_ADDR offset); | |
449 | ||
450 | /* Request that OPS transfer up to LEN 8-bit bytes of the target's | |
451 | OBJECT. The OFFSET, for a seekable object, specifies the | |
452 | starting point. The ANNEX can be used to provide additional | |
453 | data-specific information to the target. | |
454 | ||
455 | Return the number of bytes actually transfered, zero when no | |
456 | further transfer is possible, and -1 when the transfer is not | |
457 | supported. Return of a positive value smaller than LEN does | |
458 | not indicate the end of the object, only the end of the | |
459 | transfer; higher level code should continue transferring if | |
460 | desired. This is handled in target.c. | |
461 | ||
462 | The interface does not support a "retry" mechanism. Instead it | |
463 | assumes that at least one byte will be transfered on each | |
464 | successful call. | |
465 | ||
466 | NOTE: cagney/2003-10-17: The current interface can lead to | |
467 | fragmented transfers. Lower target levels should not implement | |
468 | hacks, such as enlarging the transfer, in an attempt to | |
469 | compensate for this. Instead, the target stack should be | |
470 | extended so that it implements supply/collect methods and a | |
471 | look-aside object cache. With that available, the lowest | |
472 | target can safely and freely "push" data up the stack. | |
473 | ||
474 | See target_read and target_write for more information. One, | |
475 | and only one, of readbuf or writebuf must be non-NULL. */ | |
476 | ||
477 | LONGEST (*to_xfer_partial) (struct target_ops *ops, | |
478 | enum target_object object, const char *annex, | |
479 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
480 | ULONGEST offset, LONGEST len); | |
481 | ||
482 | /* Returns the memory map for the target. A return value of NULL | |
483 | means that no memory map is available. If a memory address | |
484 | does not fall within any returned regions, it's assumed to be | |
485 | RAM. The returned memory regions should not overlap. | |
486 | ||
487 | The order of regions does not matter; target_memory_map will | |
488 | sort regions by starting address. For that reason, this | |
489 | function should not be called directly except via | |
490 | target_memory_map. | |
491 | ||
492 | This method should not cache data; if the memory map could | |
493 | change unexpectedly, it should be invalidated, and higher | |
494 | layers will re-fetch it. */ | |
495 | VEC(mem_region_s) *(*to_memory_map) (struct target_ops *); | |
496 | ||
497 | /* Erases the region of flash memory starting at ADDRESS, of | |
498 | length LENGTH. | |
499 | ||
500 | Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned | |
501 | on flash block boundaries, as reported by 'to_memory_map'. */ | |
502 | void (*to_flash_erase) (struct target_ops *, | |
503 | ULONGEST address, LONGEST length); | |
504 | ||
505 | /* Finishes a flash memory write sequence. After this operation | |
506 | all flash memory should be available for writing and the result | |
507 | of reading from areas written by 'to_flash_write' should be | |
508 | equal to what was written. */ | |
509 | void (*to_flash_done) (struct target_ops *); | |
510 | ||
511 | /* Describe the architecture-specific features of this target. | |
512 | Returns the description found, or NULL if no description | |
513 | was available. */ | |
514 | const struct target_desc *(*to_read_description) (struct target_ops *ops); | |
515 | ||
516 | /* Build the PTID of the thread on which a given task is running, | |
517 | based on LWP and THREAD. These values are extracted from the | |
518 | task Private_Data section of the Ada Task Control Block, and | |
519 | their interpretation depends on the target. */ | |
520 | ptid_t (*to_get_ada_task_ptid) (long lwp, long thread); | |
521 | ||
522 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. | |
523 | Return 0 if *READPTR is already at the end of the buffer. | |
524 | Return -1 if there is insufficient buffer for a whole entry. | |
525 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
526 | int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr, | |
527 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp); | |
528 | ||
529 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the | |
530 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
531 | ||
532 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
533 | requiring halting of the search (e.g. memory read error). | |
534 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
535 | int (*to_search_memory) (struct target_ops *ops, | |
536 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
537 | const gdb_byte *pattern, ULONGEST pattern_len, | |
538 | CORE_ADDR *found_addrp); | |
539 | ||
540 | /* Can target execute in reverse? */ | |
541 | int (*to_can_execute_reverse) (void); | |
542 | ||
543 | /* Does this target support debugging multiple processes | |
544 | simultaneously? */ | |
545 | int (*to_supports_multi_process) (void); | |
546 | ||
547 | int to_magic; | |
548 | /* Need sub-structure for target machine related rather than comm related? | |
549 | */ | |
550 | }; | |
551 | ||
552 | /* Magic number for checking ops size. If a struct doesn't end with this | |
553 | number, somebody changed the declaration but didn't change all the | |
554 | places that initialize one. */ | |
555 | ||
556 | #define OPS_MAGIC 3840 | |
557 | ||
558 | /* The ops structure for our "current" target process. This should | |
559 | never be NULL. If there is no target, it points to the dummy_target. */ | |
560 | ||
561 | extern struct target_ops current_target; | |
562 | ||
563 | /* Define easy words for doing these operations on our current target. */ | |
564 | ||
565 | #define target_shortname (current_target.to_shortname) | |
566 | #define target_longname (current_target.to_longname) | |
567 | ||
568 | /* Does whatever cleanup is required for a target that we are no | |
569 | longer going to be calling. QUITTING indicates that GDB is exiting | |
570 | and should not get hung on an error (otherwise it is important to | |
571 | perform clean termination, even if it takes a while). This routine | |
572 | is automatically always called when popping the target off the | |
573 | target stack (to_beneath is undefined). Closing file descriptors | |
574 | and freeing all memory allocated memory are typical things it | |
575 | should do. */ | |
576 | ||
577 | void target_close (struct target_ops *targ, int quitting); | |
578 | ||
579 | /* Attaches to a process on the target side. Arguments are as passed | |
580 | to the `attach' command by the user. This routine can be called | |
581 | when the target is not on the target-stack, if the target_can_run | |
582 | routine returns 1; in that case, it must push itself onto the stack. | |
583 | Upon exit, the target should be ready for normal operations, and | |
584 | should be ready to deliver the status of the process immediately | |
585 | (without waiting) to an upcoming target_wait call. */ | |
586 | ||
587 | void target_attach (char *, int); | |
588 | ||
589 | /* Some targets don't generate traps when attaching to the inferior, | |
590 | or their target_attach implementation takes care of the waiting. | |
591 | These targets must set to_attach_no_wait. */ | |
592 | ||
593 | #define target_attach_no_wait \ | |
594 | (current_target.to_attach_no_wait) | |
595 | ||
596 | /* The target_attach operation places a process under debugger control, | |
597 | and stops the process. | |
598 | ||
599 | This operation provides a target-specific hook that allows the | |
600 | necessary bookkeeping to be performed after an attach completes. */ | |
601 | #define target_post_attach(pid) \ | |
602 | (*current_target.to_post_attach) (pid) | |
603 | ||
604 | /* Takes a program previously attached to and detaches it. | |
605 | The program may resume execution (some targets do, some don't) and will | |
606 | no longer stop on signals, etc. We better not have left any breakpoints | |
607 | in the program or it'll die when it hits one. ARGS is arguments | |
608 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
609 | says whether to be verbose or not. */ | |
610 | ||
611 | extern void target_detach (char *, int); | |
612 | ||
613 | /* Disconnect from the current target without resuming it (leaving it | |
614 | waiting for a debugger). */ | |
615 | ||
616 | extern void target_disconnect (char *, int); | |
617 | ||
618 | /* Resume execution of the target process PTID. STEP says whether to | |
619 | single-step or to run free; SIGGNAL is the signal to be given to | |
620 | the target, or TARGET_SIGNAL_0 for no signal. The caller may not | |
621 | pass TARGET_SIGNAL_DEFAULT. */ | |
622 | ||
623 | extern void target_resume (ptid_t ptid, int step, enum target_signal signal); | |
624 | ||
625 | /* Wait for process pid to do something. PTID = -1 to wait for any | |
626 | pid to do something. Return pid of child, or -1 in case of error; | |
627 | store status through argument pointer STATUS. Note that it is | |
628 | _NOT_ OK to throw_exception() out of target_wait() without popping | |
629 | the debugging target from the stack; GDB isn't prepared to get back | |
630 | to the prompt with a debugging target but without the frame cache, | |
631 | stop_pc, etc., set up. */ | |
632 | ||
633 | extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status); | |
634 | ||
635 | /* Fetch at least register REGNO, or all regs if regno == -1. No result. */ | |
636 | ||
637 | extern void target_fetch_registers (struct regcache *regcache, int regno); | |
638 | ||
639 | /* Store at least register REGNO, or all regs if REGNO == -1. | |
640 | It can store as many registers as it wants to, so target_prepare_to_store | |
641 | must have been previously called. Calls error() if there are problems. */ | |
642 | ||
643 | extern void target_store_registers (struct regcache *regcache, int regs); | |
644 | ||
645 | /* Get ready to modify the registers array. On machines which store | |
646 | individual registers, this doesn't need to do anything. On machines | |
647 | which store all the registers in one fell swoop, this makes sure | |
648 | that REGISTERS contains all the registers from the program being | |
649 | debugged. */ | |
650 | ||
651 | #define target_prepare_to_store(regcache) \ | |
652 | (*current_target.to_prepare_to_store) (regcache) | |
653 | ||
654 | /* Returns true if this target can debug multiple processes | |
655 | simultaneously. */ | |
656 | ||
657 | #define target_supports_multi_process() \ | |
658 | (*current_target.to_supports_multi_process) () | |
659 | ||
660 | extern DCACHE *target_dcache; | |
661 | ||
662 | extern int target_read_string (CORE_ADDR, char **, int, int *); | |
663 | ||
664 | extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len); | |
665 | ||
666 | extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, | |
667 | int len); | |
668 | ||
669 | extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int, | |
670 | struct mem_attrib *, struct target_ops *); | |
671 | ||
672 | /* Fetches the target's memory map. If one is found it is sorted | |
673 | and returned, after some consistency checking. Otherwise, NULL | |
674 | is returned. */ | |
675 | VEC(mem_region_s) *target_memory_map (void); | |
676 | ||
677 | /* Erase the specified flash region. */ | |
678 | void target_flash_erase (ULONGEST address, LONGEST length); | |
679 | ||
680 | /* Finish a sequence of flash operations. */ | |
681 | void target_flash_done (void); | |
682 | ||
683 | /* Describes a request for a memory write operation. */ | |
684 | struct memory_write_request | |
685 | { | |
686 | /* Begining address that must be written. */ | |
687 | ULONGEST begin; | |
688 | /* Past-the-end address. */ | |
689 | ULONGEST end; | |
690 | /* The data to write. */ | |
691 | gdb_byte *data; | |
692 | /* A callback baton for progress reporting for this request. */ | |
693 | void *baton; | |
694 | }; | |
695 | typedef struct memory_write_request memory_write_request_s; | |
696 | DEF_VEC_O(memory_write_request_s); | |
697 | ||
698 | /* Enumeration specifying different flash preservation behaviour. */ | |
699 | enum flash_preserve_mode | |
700 | { | |
701 | flash_preserve, | |
702 | flash_discard | |
703 | }; | |
704 | ||
705 | /* Write several memory blocks at once. This version can be more | |
706 | efficient than making several calls to target_write_memory, in | |
707 | particular because it can optimize accesses to flash memory. | |
708 | ||
709 | Moreover, this is currently the only memory access function in gdb | |
710 | that supports writing to flash memory, and it should be used for | |
711 | all cases where access to flash memory is desirable. | |
712 | ||
713 | REQUESTS is the vector (see vec.h) of memory_write_request. | |
714 | PRESERVE_FLASH_P indicates what to do with blocks which must be | |
715 | erased, but not completely rewritten. | |
716 | PROGRESS_CB is a function that will be periodically called to provide | |
717 | feedback to user. It will be called with the baton corresponding | |
718 | to the request currently being written. It may also be called | |
719 | with a NULL baton, when preserved flash sectors are being rewritten. | |
720 | ||
721 | The function returns 0 on success, and error otherwise. */ | |
722 | int target_write_memory_blocks (VEC(memory_write_request_s) *requests, | |
723 | enum flash_preserve_mode preserve_flash_p, | |
724 | void (*progress_cb) (ULONGEST, void *)); | |
725 | ||
726 | /* From infrun.c. */ | |
727 | ||
728 | extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid); | |
729 | ||
730 | extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid); | |
731 | ||
732 | extern int inferior_has_execd (ptid_t pid, char **execd_pathname); | |
733 | ||
734 | /* From exec.c */ | |
735 | ||
736 | extern void print_section_info (struct target_ops *, bfd *); | |
737 | ||
738 | /* Print a line about the current target. */ | |
739 | ||
740 | #define target_files_info() \ | |
741 | (*current_target.to_files_info) (¤t_target) | |
742 | ||
743 | /* Insert a breakpoint at address BP_TGT->placed_address in the target | |
744 | machine. Result is 0 for success, or an errno value. */ | |
745 | ||
746 | #define target_insert_breakpoint(bp_tgt) \ | |
747 | (*current_target.to_insert_breakpoint) (bp_tgt) | |
748 | ||
749 | /* Remove a breakpoint at address BP_TGT->placed_address in the target | |
750 | machine. Result is 0 for success, or an errno value. */ | |
751 | ||
752 | #define target_remove_breakpoint(bp_tgt) \ | |
753 | (*current_target.to_remove_breakpoint) (bp_tgt) | |
754 | ||
755 | /* Initialize the terminal settings we record for the inferior, | |
756 | before we actually run the inferior. */ | |
757 | ||
758 | #define target_terminal_init() \ | |
759 | (*current_target.to_terminal_init) () | |
760 | ||
761 | /* Put the inferior's terminal settings into effect. | |
762 | This is preparation for starting or resuming the inferior. */ | |
763 | ||
764 | #define target_terminal_inferior() \ | |
765 | (*current_target.to_terminal_inferior) () | |
766 | ||
767 | /* Put some of our terminal settings into effect, | |
768 | enough to get proper results from our output, | |
769 | but do not change into or out of RAW mode | |
770 | so that no input is discarded. | |
771 | ||
772 | After doing this, either terminal_ours or terminal_inferior | |
773 | should be called to get back to a normal state of affairs. */ | |
774 | ||
775 | #define target_terminal_ours_for_output() \ | |
776 | (*current_target.to_terminal_ours_for_output) () | |
777 | ||
778 | /* Put our terminal settings into effect. | |
779 | First record the inferior's terminal settings | |
780 | so they can be restored properly later. */ | |
781 | ||
782 | #define target_terminal_ours() \ | |
783 | (*current_target.to_terminal_ours) () | |
784 | ||
785 | /* Save our terminal settings. | |
786 | This is called from TUI after entering or leaving the curses | |
787 | mode. Since curses modifies our terminal this call is here | |
788 | to take this change into account. */ | |
789 | ||
790 | #define target_terminal_save_ours() \ | |
791 | (*current_target.to_terminal_save_ours) () | |
792 | ||
793 | /* Print useful information about our terminal status, if such a thing | |
794 | exists. */ | |
795 | ||
796 | #define target_terminal_info(arg, from_tty) \ | |
797 | (*current_target.to_terminal_info) (arg, from_tty) | |
798 | ||
799 | /* Kill the inferior process. Make it go away. */ | |
800 | ||
801 | #define target_kill() \ | |
802 | (*current_target.to_kill) () | |
803 | ||
804 | /* Load an executable file into the target process. This is expected | |
805 | to not only bring new code into the target process, but also to | |
806 | update GDB's symbol tables to match. | |
807 | ||
808 | ARG contains command-line arguments, to be broken down with | |
809 | buildargv (). The first non-switch argument is the filename to | |
810 | load, FILE; the second is a number (as parsed by strtoul (..., ..., | |
811 | 0)), which is an offset to apply to the load addresses of FILE's | |
812 | sections. The target may define switches, or other non-switch | |
813 | arguments, as it pleases. */ | |
814 | ||
815 | extern void target_load (char *arg, int from_tty); | |
816 | ||
817 | /* Look up a symbol in the target's symbol table. NAME is the symbol | |
818 | name. ADDRP is a CORE_ADDR * pointing to where the value of the | |
819 | symbol should be returned. The result is 0 if successful, nonzero | |
820 | if the symbol does not exist in the target environment. This | |
821 | function should not call error() if communication with the target | |
822 | is interrupted, since it is called from symbol reading, but should | |
823 | return nonzero, possibly doing a complain(). */ | |
824 | ||
825 | #define target_lookup_symbol(name, addrp) \ | |
826 | (*current_target.to_lookup_symbol) (name, addrp) | |
827 | ||
828 | /* Start an inferior process and set inferior_ptid to its pid. | |
829 | EXEC_FILE is the file to run. | |
830 | ALLARGS is a string containing the arguments to the program. | |
831 | ENV is the environment vector to pass. Errors reported with error(). | |
832 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
833 | ||
834 | void target_create_inferior (char *exec_file, char *args, | |
835 | char **env, int from_tty); | |
836 | ||
837 | /* Some targets (such as ttrace-based HPUX) don't allow us to request | |
838 | notification of inferior events such as fork and vork immediately | |
839 | after the inferior is created. (This because of how gdb gets an | |
840 | inferior created via invoking a shell to do it. In such a scenario, | |
841 | if the shell init file has commands in it, the shell will fork and | |
842 | exec for each of those commands, and we will see each such fork | |
843 | event. Very bad.) | |
844 | ||
845 | Such targets will supply an appropriate definition for this function. */ | |
846 | ||
847 | #define target_post_startup_inferior(ptid) \ | |
848 | (*current_target.to_post_startup_inferior) (ptid) | |
849 | ||
850 | /* On some targets, the sequence of starting up an inferior requires | |
851 | some synchronization between gdb and the new inferior process, PID. */ | |
852 | ||
853 | #define target_acknowledge_created_inferior(pid) \ | |
854 | (*current_target.to_acknowledge_created_inferior) (pid) | |
855 | ||
856 | /* On some targets, we can catch an inferior fork or vfork event when | |
857 | it occurs. These functions insert/remove an already-created | |
858 | catchpoint for such events. */ | |
859 | ||
860 | #define target_insert_fork_catchpoint(pid) \ | |
861 | (*current_target.to_insert_fork_catchpoint) (pid) | |
862 | ||
863 | #define target_remove_fork_catchpoint(pid) \ | |
864 | (*current_target.to_remove_fork_catchpoint) (pid) | |
865 | ||
866 | #define target_insert_vfork_catchpoint(pid) \ | |
867 | (*current_target.to_insert_vfork_catchpoint) (pid) | |
868 | ||
869 | #define target_remove_vfork_catchpoint(pid) \ | |
870 | (*current_target.to_remove_vfork_catchpoint) (pid) | |
871 | ||
872 | /* If the inferior forks or vforks, this function will be called at | |
873 | the next resume in order to perform any bookkeeping and fiddling | |
874 | necessary to continue debugging either the parent or child, as | |
875 | requested, and releasing the other. Information about the fork | |
876 | or vfork event is available via get_last_target_status (). | |
877 | This function returns 1 if the inferior should not be resumed | |
878 | (i.e. there is another event pending). */ | |
879 | ||
880 | int target_follow_fork (int follow_child); | |
881 | ||
882 | /* On some targets, we can catch an inferior exec event when it | |
883 | occurs. These functions insert/remove an already-created | |
884 | catchpoint for such events. */ | |
885 | ||
886 | #define target_insert_exec_catchpoint(pid) \ | |
887 | (*current_target.to_insert_exec_catchpoint) (pid) | |
888 | ||
889 | #define target_remove_exec_catchpoint(pid) \ | |
890 | (*current_target.to_remove_exec_catchpoint) (pid) | |
891 | ||
892 | /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the | |
893 | exit code of PID, if any. */ | |
894 | ||
895 | #define target_has_exited(pid,wait_status,exit_status) \ | |
896 | (*current_target.to_has_exited) (pid,wait_status,exit_status) | |
897 | ||
898 | /* The debugger has completed a blocking wait() call. There is now | |
899 | some process event that must be processed. This function should | |
900 | be defined by those targets that require the debugger to perform | |
901 | cleanup or internal state changes in response to the process event. */ | |
902 | ||
903 | /* The inferior process has died. Do what is right. */ | |
904 | ||
905 | void target_mourn_inferior (void); | |
906 | ||
907 | /* Does target have enough data to do a run or attach command? */ | |
908 | ||
909 | #define target_can_run(t) \ | |
910 | ((t)->to_can_run) () | |
911 | ||
912 | /* post process changes to signal handling in the inferior. */ | |
913 | ||
914 | #define target_notice_signals(ptid) \ | |
915 | (*current_target.to_notice_signals) (ptid) | |
916 | ||
917 | /* Check to see if a thread is still alive. */ | |
918 | ||
919 | extern int target_thread_alive (ptid_t ptid); | |
920 | ||
921 | /* Query for new threads and add them to the thread list. */ | |
922 | ||
923 | extern void target_find_new_threads (void); | |
924 | ||
925 | /* Make target stop in a continuable fashion. (For instance, under | |
926 | Unix, this should act like SIGSTOP). This function is normally | |
927 | used by GUIs to implement a stop button. */ | |
928 | ||
929 | #define target_stop(ptid) (*current_target.to_stop) (ptid) | |
930 | ||
931 | /* Send the specified COMMAND to the target's monitor | |
932 | (shell,interpreter) for execution. The result of the query is | |
933 | placed in OUTBUF. */ | |
934 | ||
935 | #define target_rcmd(command, outbuf) \ | |
936 | (*current_target.to_rcmd) (command, outbuf) | |
937 | ||
938 | ||
939 | /* Does the target include all of memory, or only part of it? This | |
940 | determines whether we look up the target chain for other parts of | |
941 | memory if this target can't satisfy a request. */ | |
942 | ||
943 | #define target_has_all_memory \ | |
944 | (current_target.to_has_all_memory) | |
945 | ||
946 | /* Does the target include memory? (Dummy targets don't.) */ | |
947 | ||
948 | #define target_has_memory \ | |
949 | (current_target.to_has_memory) | |
950 | ||
951 | /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until | |
952 | we start a process.) */ | |
953 | ||
954 | #define target_has_stack \ | |
955 | (current_target.to_has_stack) | |
956 | ||
957 | /* Does the target have registers? (Exec files don't.) */ | |
958 | ||
959 | #define target_has_registers \ | |
960 | (current_target.to_has_registers) | |
961 | ||
962 | /* Does the target have execution? Can we make it jump (through | |
963 | hoops), or pop its stack a few times? This means that the current | |
964 | target is currently executing; for some targets, that's the same as | |
965 | whether or not the target is capable of execution, but there are | |
966 | also targets which can be current while not executing. In that | |
967 | case this will become true after target_create_inferior or | |
968 | target_attach. */ | |
969 | ||
970 | #define target_has_execution \ | |
971 | (current_target.to_has_execution) | |
972 | ||
973 | /* Can the target support the debugger control of thread execution? | |
974 | Can it lock the thread scheduler? */ | |
975 | ||
976 | #define target_can_lock_scheduler \ | |
977 | (current_target.to_has_thread_control & tc_schedlock) | |
978 | ||
979 | /* Should the target enable async mode if it is supported? Temporary | |
980 | cludge until async mode is a strict superset of sync mode. */ | |
981 | extern int target_async_permitted; | |
982 | ||
983 | /* Can the target support asynchronous execution? */ | |
984 | #define target_can_async_p() (current_target.to_can_async_p ()) | |
985 | ||
986 | /* Is the target in asynchronous execution mode? */ | |
987 | #define target_is_async_p() (current_target.to_is_async_p ()) | |
988 | ||
989 | int target_supports_non_stop (void); | |
990 | ||
991 | /* Put the target in async mode with the specified callback function. */ | |
992 | #define target_async(CALLBACK,CONTEXT) \ | |
993 | (current_target.to_async ((CALLBACK), (CONTEXT))) | |
994 | ||
995 | /* This is to be used ONLY within call_function_by_hand(). It provides | |
996 | a workaround, to have inferior function calls done in sychronous | |
997 | mode, even though the target is asynchronous. After | |
998 | target_async_mask(0) is called, calls to target_can_async_p() will | |
999 | return FALSE , so that target_resume() will not try to start the | |
1000 | target asynchronously. After the inferior stops, we IMMEDIATELY | |
1001 | restore the previous nature of the target, by calling | |
1002 | target_async_mask(1). After that, target_can_async_p() will return | |
1003 | TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. | |
1004 | ||
1005 | FIXME ezannoni 1999-12-13: we won't need this once we move | |
1006 | the turning async on and off to the single execution commands, | |
1007 | from where it is done currently, in remote_resume(). */ | |
1008 | ||
1009 | #define target_async_mask(MASK) \ | |
1010 | (current_target.to_async_mask (MASK)) | |
1011 | ||
1012 | /* Converts a process id to a string. Usually, the string just contains | |
1013 | `process xyz', but on some systems it may contain | |
1014 | `process xyz thread abc'. */ | |
1015 | ||
1016 | extern char *target_pid_to_str (ptid_t ptid); | |
1017 | ||
1018 | extern char *normal_pid_to_str (ptid_t ptid); | |
1019 | ||
1020 | /* Return a short string describing extra information about PID, | |
1021 | e.g. "sleeping", "runnable", "running on LWP 3". Null return value | |
1022 | is okay. */ | |
1023 | ||
1024 | #define target_extra_thread_info(TP) \ | |
1025 | (current_target.to_extra_thread_info (TP)) | |
1026 | ||
1027 | /* Attempts to find the pathname of the executable file | |
1028 | that was run to create a specified process. | |
1029 | ||
1030 | The process PID must be stopped when this operation is used. | |
1031 | ||
1032 | If the executable file cannot be determined, NULL is returned. | |
1033 | ||
1034 | Else, a pointer to a character string containing the pathname | |
1035 | is returned. This string should be copied into a buffer by | |
1036 | the client if the string will not be immediately used, or if | |
1037 | it must persist. */ | |
1038 | ||
1039 | #define target_pid_to_exec_file(pid) \ | |
1040 | (current_target.to_pid_to_exec_file) (pid) | |
1041 | ||
1042 | /* | |
1043 | * Iterator function for target memory regions. | |
1044 | * Calls a callback function once for each memory region 'mapped' | |
1045 | * in the child process. Defined as a simple macro rather than | |
1046 | * as a function macro so that it can be tested for nullity. | |
1047 | */ | |
1048 | ||
1049 | #define target_find_memory_regions(FUNC, DATA) \ | |
1050 | (current_target.to_find_memory_regions) (FUNC, DATA) | |
1051 | ||
1052 | /* | |
1053 | * Compose corefile .note section. | |
1054 | */ | |
1055 | ||
1056 | #define target_make_corefile_notes(BFD, SIZE_P) \ | |
1057 | (current_target.to_make_corefile_notes) (BFD, SIZE_P) | |
1058 | ||
1059 | /* Hardware watchpoint interfaces. */ | |
1060 | ||
1061 | /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or | |
1062 | write). */ | |
1063 | ||
1064 | #ifndef STOPPED_BY_WATCHPOINT | |
1065 | #define STOPPED_BY_WATCHPOINT(w) \ | |
1066 | (*current_target.to_stopped_by_watchpoint) () | |
1067 | #endif | |
1068 | ||
1069 | /* Non-zero if we have steppable watchpoints */ | |
1070 | ||
1071 | #ifndef HAVE_STEPPABLE_WATCHPOINT | |
1072 | #define HAVE_STEPPABLE_WATCHPOINT \ | |
1073 | (current_target.to_have_steppable_watchpoint) | |
1074 | #endif | |
1075 | ||
1076 | /* Non-zero if we have continuable watchpoints */ | |
1077 | ||
1078 | #ifndef HAVE_CONTINUABLE_WATCHPOINT | |
1079 | #define HAVE_CONTINUABLE_WATCHPOINT \ | |
1080 | (current_target.to_have_continuable_watchpoint) | |
1081 | #endif | |
1082 | ||
1083 | /* Provide defaults for hardware watchpoint functions. */ | |
1084 | ||
1085 | /* If the *_hw_beakpoint functions have not been defined | |
1086 | elsewhere use the definitions in the target vector. */ | |
1087 | ||
1088 | /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is | |
1089 | one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or | |
1090 | bp_hardware_breakpoint. CNT is the number of such watchpoints used so far | |
1091 | (including this one?). OTHERTYPE is who knows what... */ | |
1092 | ||
1093 | #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT | |
1094 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \ | |
1095 | (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE); | |
1096 | #endif | |
1097 | ||
1098 | #ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT | |
1099 | #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \ | |
1100 | (*current_target.to_region_ok_for_hw_watchpoint) (addr, len) | |
1101 | #endif | |
1102 | ||
1103 | ||
1104 | /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 | |
1105 | for write, 1 for read, and 2 for read/write accesses. Returns 0 for | |
1106 | success, non-zero for failure. */ | |
1107 | ||
1108 | #ifndef target_insert_watchpoint | |
1109 | #define target_insert_watchpoint(addr, len, type) \ | |
1110 | (*current_target.to_insert_watchpoint) (addr, len, type) | |
1111 | ||
1112 | #define target_remove_watchpoint(addr, len, type) \ | |
1113 | (*current_target.to_remove_watchpoint) (addr, len, type) | |
1114 | #endif | |
1115 | ||
1116 | #ifndef target_insert_hw_breakpoint | |
1117 | #define target_insert_hw_breakpoint(bp_tgt) \ | |
1118 | (*current_target.to_insert_hw_breakpoint) (bp_tgt) | |
1119 | ||
1120 | #define target_remove_hw_breakpoint(bp_tgt) \ | |
1121 | (*current_target.to_remove_hw_breakpoint) (bp_tgt) | |
1122 | #endif | |
1123 | ||
1124 | #ifndef target_stopped_data_address | |
1125 | #define target_stopped_data_address(target, x) \ | |
1126 | (*target.to_stopped_data_address) (target, x) | |
1127 | #endif | |
1128 | ||
1129 | #define target_watchpoint_addr_within_range(target, addr, start, length) \ | |
1130 | (*target.to_watchpoint_addr_within_range) (target, addr, start, length) | |
1131 | ||
1132 | /* Target can execute in reverse? */ | |
1133 | #define target_can_execute_reverse \ | |
1134 | (current_target.to_can_execute_reverse ? \ | |
1135 | current_target.to_can_execute_reverse () : 0) | |
1136 | ||
1137 | extern const struct target_desc *target_read_description (struct target_ops *); | |
1138 | ||
1139 | #define target_get_ada_task_ptid(lwp, tid) \ | |
1140 | (*current_target.to_get_ada_task_ptid) (lwp,tid) | |
1141 | ||
1142 | /* Utility implementation of searching memory. */ | |
1143 | extern int simple_search_memory (struct target_ops* ops, | |
1144 | CORE_ADDR start_addr, | |
1145 | ULONGEST search_space_len, | |
1146 | const gdb_byte *pattern, | |
1147 | ULONGEST pattern_len, | |
1148 | CORE_ADDR *found_addrp); | |
1149 | ||
1150 | /* Main entry point for searching memory. */ | |
1151 | extern int target_search_memory (CORE_ADDR start_addr, | |
1152 | ULONGEST search_space_len, | |
1153 | const gdb_byte *pattern, | |
1154 | ULONGEST pattern_len, | |
1155 | CORE_ADDR *found_addrp); | |
1156 | ||
1157 | /* Command logging facility. */ | |
1158 | ||
1159 | #define target_log_command(p) \ | |
1160 | do \ | |
1161 | if (current_target.to_log_command) \ | |
1162 | (*current_target.to_log_command) (p); \ | |
1163 | while (0) | |
1164 | ||
1165 | /* Routines for maintenance of the target structures... | |
1166 | ||
1167 | add_target: Add a target to the list of all possible targets. | |
1168 | ||
1169 | push_target: Make this target the top of the stack of currently used | |
1170 | targets, within its particular stratum of the stack. Result | |
1171 | is 0 if now atop the stack, nonzero if not on top (maybe | |
1172 | should warn user). | |
1173 | ||
1174 | unpush_target: Remove this from the stack of currently used targets, | |
1175 | no matter where it is on the list. Returns 0 if no | |
1176 | change, 1 if removed from stack. | |
1177 | ||
1178 | pop_target: Remove the top thing on the stack of current targets. */ | |
1179 | ||
1180 | extern void add_target (struct target_ops *); | |
1181 | ||
1182 | extern int push_target (struct target_ops *); | |
1183 | ||
1184 | extern int unpush_target (struct target_ops *); | |
1185 | ||
1186 | extern void target_pre_inferior (int); | |
1187 | ||
1188 | extern void target_preopen (int); | |
1189 | ||
1190 | extern void pop_target (void); | |
1191 | ||
1192 | /* Does whatever cleanup is required to get rid of all pushed targets. | |
1193 | QUITTING is propagated to target_close; it indicates that GDB is | |
1194 | exiting and should not get hung on an error (otherwise it is | |
1195 | important to perform clean termination, even if it takes a | |
1196 | while). */ | |
1197 | extern void pop_all_targets (int quitting); | |
1198 | ||
1199 | /* Like pop_all_targets, but pops only targets whose stratum is | |
1200 | strictly above ABOVE_STRATUM. */ | |
1201 | extern void pop_all_targets_above (enum strata above_stratum, int quitting); | |
1202 | ||
1203 | extern CORE_ADDR target_translate_tls_address (struct objfile *objfile, | |
1204 | CORE_ADDR offset); | |
1205 | ||
1206 | /* Mark a pushed target as running or exited, for targets which do not | |
1207 | automatically pop when not active. */ | |
1208 | ||
1209 | void target_mark_running (struct target_ops *); | |
1210 | ||
1211 | void target_mark_exited (struct target_ops *); | |
1212 | ||
1213 | /* Struct section_table maps address ranges to file sections. It is | |
1214 | mostly used with BFD files, but can be used without (e.g. for handling | |
1215 | raw disks, or files not in formats handled by BFD). */ | |
1216 | ||
1217 | struct section_table | |
1218 | { | |
1219 | CORE_ADDR addr; /* Lowest address in section */ | |
1220 | CORE_ADDR endaddr; /* 1+highest address in section */ | |
1221 | ||
1222 | struct bfd_section *the_bfd_section; | |
1223 | ||
1224 | bfd *bfd; /* BFD file pointer */ | |
1225 | }; | |
1226 | ||
1227 | /* Return the "section" containing the specified address. */ | |
1228 | struct section_table *target_section_by_addr (struct target_ops *target, | |
1229 | CORE_ADDR addr); | |
1230 | ||
1231 | ||
1232 | /* From mem-break.c */ | |
1233 | ||
1234 | extern int memory_remove_breakpoint (struct bp_target_info *); | |
1235 | ||
1236 | extern int memory_insert_breakpoint (struct bp_target_info *); | |
1237 | ||
1238 | extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *); | |
1239 | ||
1240 | extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *); | |
1241 | ||
1242 | ||
1243 | /* From target.c */ | |
1244 | ||
1245 | extern void initialize_targets (void); | |
1246 | ||
1247 | extern NORETURN void noprocess (void) ATTR_NORETURN; | |
1248 | ||
1249 | extern void target_require_runnable (void); | |
1250 | ||
1251 | extern void find_default_attach (struct target_ops *, char *, int); | |
1252 | ||
1253 | extern void find_default_create_inferior (struct target_ops *, | |
1254 | char *, char *, char **, int); | |
1255 | ||
1256 | extern struct target_ops *find_run_target (void); | |
1257 | ||
1258 | extern struct target_ops *find_core_target (void); | |
1259 | ||
1260 | extern struct target_ops *find_target_beneath (struct target_ops *); | |
1261 | ||
1262 | extern int target_resize_to_sections (struct target_ops *target, | |
1263 | int num_added); | |
1264 | ||
1265 | extern void remove_target_sections (bfd *abfd); | |
1266 | ||
1267 | /* Read OS data object of type TYPE from the target, and return it in | |
1268 | XML format. The result is NUL-terminated and returned as a string, | |
1269 | allocated using xmalloc. If an error occurs or the transfer is | |
1270 | unsupported, NULL is returned. Empty objects are returned as | |
1271 | allocated but empty strings. */ | |
1272 | ||
1273 | extern char *target_get_osdata (const char *type); | |
1274 | ||
1275 | \f | |
1276 | /* Stuff that should be shared among the various remote targets. */ | |
1277 | ||
1278 | /* Debugging level. 0 is off, and non-zero values mean to print some debug | |
1279 | information (higher values, more information). */ | |
1280 | extern int remote_debug; | |
1281 | ||
1282 | /* Speed in bits per second, or -1 which means don't mess with the speed. */ | |
1283 | extern int baud_rate; | |
1284 | /* Timeout limit for response from target. */ | |
1285 | extern int remote_timeout; | |
1286 | ||
1287 | \f | |
1288 | /* Functions for helping to write a native target. */ | |
1289 | ||
1290 | /* This is for native targets which use a unix/POSIX-style waitstatus. */ | |
1291 | extern void store_waitstatus (struct target_waitstatus *, int); | |
1292 | ||
1293 | /* Predicate to target_signal_to_host(). Return non-zero if the enum | |
1294 | targ_signal SIGNO has an equivalent ``host'' representation. */ | |
1295 | /* FIXME: cagney/1999-11-22: The name below was chosen in preference | |
1296 | to the shorter target_signal_p() because it is far less ambigious. | |
1297 | In this context ``target_signal'' refers to GDB's internal | |
1298 | representation of the target's set of signals while ``host signal'' | |
1299 | refers to the target operating system's signal. Confused? */ | |
1300 | ||
1301 | extern int target_signal_to_host_p (enum target_signal signo); | |
1302 | ||
1303 | /* Convert between host signal numbers and enum target_signal's. | |
1304 | target_signal_to_host() returns 0 and prints a warning() on GDB's | |
1305 | console if SIGNO has no equivalent host representation. */ | |
1306 | /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is | |
1307 | refering to the target operating system's signal numbering. | |
1308 | Similarly, ``enum target_signal'' is named incorrectly, ``enum | |
1309 | gdb_signal'' would probably be better as it is refering to GDB's | |
1310 | internal representation of a target operating system's signal. */ | |
1311 | ||
1312 | extern enum target_signal target_signal_from_host (int); | |
1313 | extern int target_signal_to_host (enum target_signal); | |
1314 | ||
1315 | extern enum target_signal default_target_signal_from_host (struct gdbarch *, | |
1316 | int); | |
1317 | extern int default_target_signal_to_host (struct gdbarch *, | |
1318 | enum target_signal); | |
1319 | ||
1320 | /* Convert from a number used in a GDB command to an enum target_signal. */ | |
1321 | extern enum target_signal target_signal_from_command (int); | |
1322 | ||
1323 | /* Set the show memory breakpoints mode to show, and installs a cleanup | |
1324 | to restore it back to the current value. */ | |
1325 | extern struct cleanup *make_show_memory_breakpoints_cleanup (int show); | |
1326 | ||
1327 | \f | |
1328 | /* Imported from machine dependent code */ | |
1329 | ||
1330 | /* Blank target vector entries are initialized to target_ignore. */ | |
1331 | void target_ignore (void); | |
1332 | ||
1333 | extern struct target_ops deprecated_child_ops; | |
1334 | ||
1335 | #endif /* !defined (TARGET_H) */ |