Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions above target vector, for GDB. |
1bac305b | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, 1998, |
9b254dd1 | 4 | 1999, 2000, 2001, 2003, 2006, 2007, 2008 Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "gdb_string.h" | |
23 | #include <errno.h> | |
24 | #include <signal.h> | |
25 | #include <fcntl.h> | |
c906108c SS |
26 | #include "inferior.h" |
27 | #include "symtab.h" | |
28 | #include "command.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "bfd.h" | |
31 | #include "target.h" | |
32 | #include "gdbcore.h" | |
33 | #include "dis-asm.h" | |
c906108c | 34 | #include "gdb_stat.h" |
d75b5104 | 35 | #include "completer.h" |
60250e8b | 36 | #include "exceptions.h" |
c906108c | 37 | |
c906108c SS |
38 | /* Local function declarations. */ |
39 | ||
a14ed312 KB |
40 | extern void _initialize_core (void); |
41 | static void call_extra_exec_file_hooks (char *filename); | |
c906108c | 42 | |
9a4105ab AC |
43 | /* You can have any number of hooks for `exec_file_command' command to |
44 | call. If there's only one hook, it is set in exec_file_display | |
45 | hook. If there are two or more hooks, they are set in | |
46 | exec_file_extra_hooks[], and deprecated_exec_file_display_hook is | |
47 | set to a function that calls all of them. This extra complexity is | |
48 | needed to preserve compatibility with old code that assumed that | |
49 | only one hook could be set, and which called | |
50 | deprecated_exec_file_display_hook directly. */ | |
c906108c | 51 | |
507f3c78 | 52 | typedef void (*hook_type) (char *); |
c906108c | 53 | |
9a4105ab | 54 | hook_type deprecated_exec_file_display_hook; /* the original hook */ |
c906108c | 55 | static hook_type *exec_file_extra_hooks; /* array of additional hooks */ |
c5aa993b | 56 | static int exec_file_hook_count = 0; /* size of array */ |
c906108c SS |
57 | |
58 | /* Binary file diddling handle for the core file. */ | |
59 | ||
60 | bfd *core_bfd = NULL; | |
c906108c | 61 | \f |
c5aa993b | 62 | |
c906108c SS |
63 | /* Backward compatability with old way of specifying core files. */ |
64 | ||
65 | void | |
fba45db2 | 66 | core_file_command (char *filename, int from_tty) |
c906108c SS |
67 | { |
68 | struct target_ops *t; | |
69 | ||
c5aa993b | 70 | dont_repeat (); /* Either way, seems bogus. */ |
c906108c SS |
71 | |
72 | t = find_core_target (); | |
46c6cdcf | 73 | if (t == NULL) |
8a3fe4f8 | 74 | error (_("GDB can't read core files on this machine.")); |
46c6cdcf C |
75 | |
76 | if (!filename) | |
77 | (t->to_detach) (filename, from_tty); | |
78 | else | |
79 | (t->to_open) (filename, from_tty); | |
c906108c | 80 | } |
c906108c | 81 | \f |
c5aa993b | 82 | |
de6854b5 MS |
83 | /* If there are two or more functions that wish to hook into |
84 | exec_file_command, this function will call all of the hook | |
85 | functions. */ | |
c906108c SS |
86 | |
87 | static void | |
fba45db2 | 88 | call_extra_exec_file_hooks (char *filename) |
c906108c SS |
89 | { |
90 | int i; | |
91 | ||
92 | for (i = 0; i < exec_file_hook_count; i++) | |
c5aa993b | 93 | (*exec_file_extra_hooks[i]) (filename); |
c906108c SS |
94 | } |
95 | ||
96 | /* Call this to specify the hook for exec_file_command to call back. | |
97 | This is called from the x-window display code. */ | |
98 | ||
99 | void | |
dbb41be1 | 100 | specify_exec_file_hook (void (*hook) (char *)) |
c906108c SS |
101 | { |
102 | hook_type *new_array; | |
103 | ||
9a4105ab | 104 | if (deprecated_exec_file_display_hook != NULL) |
c906108c SS |
105 | { |
106 | /* There's already a hook installed. Arrange to have both it | |
107 | * and the subsequent hooks called. */ | |
108 | if (exec_file_hook_count == 0) | |
109 | { | |
de6854b5 | 110 | /* If this is the first extra hook, initialize the hook array. */ |
c5aa993b | 111 | exec_file_extra_hooks = (hook_type *) xmalloc (sizeof (hook_type)); |
9a4105ab AC |
112 | exec_file_extra_hooks[0] = deprecated_exec_file_display_hook; |
113 | deprecated_exec_file_display_hook = call_extra_exec_file_hooks; | |
c906108c SS |
114 | exec_file_hook_count = 1; |
115 | } | |
116 | ||
117 | /* Grow the hook array by one and add the new hook to the end. | |
118 | Yes, it's inefficient to grow it by one each time but since | |
119 | this is hardly ever called it's not a big deal. */ | |
120 | exec_file_hook_count++; | |
121 | new_array = | |
122 | (hook_type *) xrealloc (exec_file_extra_hooks, | |
c5aa993b | 123 | exec_file_hook_count * sizeof (hook_type)); |
c906108c SS |
124 | exec_file_extra_hooks = new_array; |
125 | exec_file_extra_hooks[exec_file_hook_count - 1] = hook; | |
126 | } | |
127 | else | |
9a4105ab | 128 | deprecated_exec_file_display_hook = hook; |
c906108c SS |
129 | } |
130 | ||
131 | /* The exec file must be closed before running an inferior. | |
132 | If it is needed again after the inferior dies, it must | |
133 | be reopened. */ | |
134 | ||
135 | void | |
fba45db2 | 136 | close_exec_file (void) |
c906108c | 137 | { |
c5aa993b | 138 | #if 0 /* FIXME */ |
c906108c SS |
139 | if (exec_bfd) |
140 | bfd_tempclose (exec_bfd); | |
141 | #endif | |
142 | } | |
143 | ||
144 | void | |
fba45db2 | 145 | reopen_exec_file (void) |
c906108c | 146 | { |
c5aa993b | 147 | #if 0 /* FIXME */ |
c906108c SS |
148 | if (exec_bfd) |
149 | bfd_reopen (exec_bfd); | |
150 | #else | |
151 | char *filename; | |
152 | int res; | |
153 | struct stat st; | |
154 | long mtime; | |
155 | ||
4c42eaff DJ |
156 | /* Don't do anything if there isn't an exec file. */ |
157 | if (exec_bfd == NULL) | |
c906108c | 158 | return; |
c5aa993b | 159 | |
c906108c | 160 | /* If the timestamp of the exec file has changed, reopen it. */ |
c2d11a7d | 161 | filename = xstrdup (bfd_get_filename (exec_bfd)); |
b8c9b27d | 162 | make_cleanup (xfree, filename); |
c906108c SS |
163 | res = stat (filename, &st); |
164 | ||
c04ea773 | 165 | if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime) |
4c42eaff | 166 | exec_file_attach (filename, 0); |
c906108c SS |
167 | #endif |
168 | } | |
169 | \f | |
170 | /* If we have both a core file and an exec file, | |
171 | print a warning if they don't go together. */ | |
172 | ||
173 | void | |
fba45db2 | 174 | validate_files (void) |
c906108c SS |
175 | { |
176 | if (exec_bfd && core_bfd) | |
177 | { | |
178 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) | |
8a3fe4f8 | 179 | warning (_("core file may not match specified executable file.")); |
c5aa993b | 180 | else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd)) |
8a3fe4f8 | 181 | warning (_("exec file is newer than core file.")); |
c906108c SS |
182 | } |
183 | } | |
184 | ||
185 | /* Return the name of the executable file as a string. | |
186 | ERR nonzero means get error if there is none specified; | |
187 | otherwise return 0 in that case. */ | |
188 | ||
189 | char * | |
fba45db2 | 190 | get_exec_file (int err) |
c906108c | 191 | { |
c5aa993b JM |
192 | if (exec_bfd) |
193 | return bfd_get_filename (exec_bfd); | |
194 | if (!err) | |
195 | return NULL; | |
c906108c | 196 | |
8a3fe4f8 AC |
197 | error (_("No executable file specified.\n\ |
198 | Use the \"file\" or \"exec-file\" command.")); | |
c906108c SS |
199 | return NULL; |
200 | } | |
c906108c | 201 | \f |
c5aa993b | 202 | |
c906108c SS |
203 | /* Report a memory error with error(). */ |
204 | ||
205 | void | |
fba45db2 | 206 | memory_error (int status, CORE_ADDR memaddr) |
c906108c | 207 | { |
d9fcf2fb JM |
208 | struct ui_file *tmp_stream = mem_fileopen (); |
209 | make_cleanup_ui_file_delete (tmp_stream); | |
2acceee2 | 210 | |
c906108c SS |
211 | if (status == EIO) |
212 | { | |
213 | /* Actually, address between memaddr and memaddr + len | |
c5aa993b | 214 | was out of bounds. */ |
2acceee2 | 215 | fprintf_unfiltered (tmp_stream, "Cannot access memory at address "); |
ed49a04f | 216 | fputs_filtered (paddress (memaddr), tmp_stream); |
c906108c SS |
217 | } |
218 | else | |
219 | { | |
2acceee2 | 220 | fprintf_filtered (tmp_stream, "Error accessing memory address "); |
ed49a04f | 221 | fputs_filtered (paddress (memaddr), tmp_stream); |
2acceee2 | 222 | fprintf_filtered (tmp_stream, ": %s.", |
c5aa993b | 223 | safe_strerror (status)); |
c906108c | 224 | } |
2acceee2 JM |
225 | |
226 | error_stream (tmp_stream); | |
c906108c SS |
227 | } |
228 | ||
229 | /* Same as target_read_memory, but report an error if can't read. */ | |
230 | void | |
10c42a71 | 231 | read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len) |
c906108c SS |
232 | { |
233 | int status; | |
234 | status = target_read_memory (memaddr, myaddr, len); | |
235 | if (status != 0) | |
236 | memory_error (status, memaddr); | |
237 | } | |
238 | ||
ee8ff470 KB |
239 | /* Argument / return result struct for use with |
240 | do_captured_read_memory_integer(). MEMADDR and LEN are filled in | |
241 | by gdb_read_memory_integer(). RESULT is the contents that were | |
242 | successfully read from MEMADDR of length LEN. */ | |
c906108c | 243 | |
16a0f3e7 EZ |
244 | struct captured_read_memory_integer_arguments |
245 | { | |
246 | CORE_ADDR memaddr; | |
247 | int len; | |
248 | LONGEST result; | |
249 | }; | |
250 | ||
ee8ff470 KB |
251 | /* Helper function for gdb_read_memory_integer(). DATA must be a |
252 | pointer to a captured_read_memory_integer_arguments struct. | |
253 | Return 1 if successful. Note that the catch_errors() interface | |
254 | will return 0 if an error occurred while reading memory. This | |
255 | choice of return code is so that we can distinguish between | |
256 | success and failure. */ | |
257 | ||
16a0f3e7 EZ |
258 | static int |
259 | do_captured_read_memory_integer (void *data) | |
260 | { | |
261 | struct captured_read_memory_integer_arguments *args = (struct captured_read_memory_integer_arguments*) data; | |
262 | CORE_ADDR memaddr = args->memaddr; | |
263 | int len = args->len; | |
264 | ||
265 | args->result = read_memory_integer (memaddr, len); | |
266 | ||
ee8ff470 | 267 | return 1; |
16a0f3e7 EZ |
268 | } |
269 | ||
ee8ff470 KB |
270 | /* Read memory at MEMADDR of length LEN and put the contents in |
271 | RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero | |
272 | if successful. */ | |
273 | ||
16a0f3e7 EZ |
274 | int |
275 | safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value) | |
276 | { | |
277 | int status; | |
278 | struct captured_read_memory_integer_arguments args; | |
279 | args.memaddr = memaddr; | |
280 | args.len = len; | |
281 | ||
282 | status = catch_errors (do_captured_read_memory_integer, &args, | |
283 | "", RETURN_MASK_ALL); | |
ee8ff470 | 284 | if (status) |
16a0f3e7 EZ |
285 | *return_value = args.result; |
286 | ||
287 | return status; | |
288 | } | |
289 | ||
c906108c | 290 | LONGEST |
fba45db2 | 291 | read_memory_integer (CORE_ADDR memaddr, int len) |
c906108c | 292 | { |
dfb65433 | 293 | gdb_byte buf[sizeof (LONGEST)]; |
c906108c SS |
294 | |
295 | read_memory (memaddr, buf, len); | |
296 | return extract_signed_integer (buf, len); | |
297 | } | |
298 | ||
299 | ULONGEST | |
fba45db2 | 300 | read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
c906108c | 301 | { |
dfb65433 | 302 | gdb_byte buf[sizeof (ULONGEST)]; |
c906108c SS |
303 | |
304 | read_memory (memaddr, buf, len); | |
305 | return extract_unsigned_integer (buf, len); | |
306 | } | |
307 | ||
308 | void | |
fba45db2 | 309 | read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
c906108c | 310 | { |
52f0bd74 AC |
311 | char *cp; |
312 | int i; | |
c906108c SS |
313 | int cnt; |
314 | ||
315 | cp = buffer; | |
316 | while (1) | |
317 | { | |
318 | if (cp - buffer >= max_len) | |
c5aa993b JM |
319 | { |
320 | buffer[max_len - 1] = '\0'; | |
321 | break; | |
322 | } | |
c906108c SS |
323 | cnt = max_len - (cp - buffer); |
324 | if (cnt > 8) | |
325 | cnt = 8; | |
326 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
327 | for (i = 0; i < cnt && *cp; i++, cp++) | |
c5aa993b | 328 | ; /* null body */ |
c906108c SS |
329 | |
330 | if (i < cnt && !*cp) | |
c5aa993b | 331 | break; |
c906108c SS |
332 | } |
333 | } | |
c26e4683 | 334 | |
0d540cdf KD |
335 | CORE_ADDR |
336 | read_memory_typed_address (CORE_ADDR addr, struct type *type) | |
337 | { | |
dfb65433 | 338 | gdb_byte *buf = alloca (TYPE_LENGTH (type)); |
0d540cdf KD |
339 | read_memory (addr, buf, TYPE_LENGTH (type)); |
340 | return extract_typed_address (buf, type); | |
341 | } | |
342 | ||
c26e4683 JB |
343 | /* Same as target_write_memory, but report an error if can't write. */ |
344 | void | |
10e2d419 | 345 | write_memory (CORE_ADDR memaddr, const bfd_byte *myaddr, int len) |
c26e4683 JB |
346 | { |
347 | int status; | |
dfb65433 | 348 | gdb_byte *bytes = alloca (len); |
10e2d419 AC |
349 | |
350 | memcpy (bytes, myaddr, len); | |
351 | status = target_write_memory (memaddr, bytes, len); | |
c26e4683 JB |
352 | if (status != 0) |
353 | memory_error (status, memaddr); | |
354 | } | |
355 | ||
356 | /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ | |
357 | void | |
358 | write_memory_unsigned_integer (CORE_ADDR addr, int len, ULONGEST value) | |
359 | { | |
dfb65433 | 360 | gdb_byte *buf = alloca (len); |
c26e4683 JB |
361 | store_unsigned_integer (buf, len, value); |
362 | write_memory (addr, buf, len); | |
363 | } | |
364 | ||
365 | /* Store VALUE at ADDR in the inferior as a LEN-byte signed integer. */ | |
366 | void | |
367 | write_memory_signed_integer (CORE_ADDR addr, int len, LONGEST value) | |
368 | { | |
dfb65433 | 369 | gdb_byte *buf = alloca (len); |
c26e4683 JB |
370 | store_signed_integer (buf, len, value); |
371 | write_memory (addr, buf, len); | |
372 | } | |
373 | ||
c906108c | 374 | \f |
c5aa993b | 375 | |
c906108c SS |
376 | #if 0 |
377 | /* Enable after 4.12. It is not tested. */ | |
378 | ||
379 | /* Search code. Targets can just make this their search function, or | |
380 | if the protocol has a less general search function, they can call this | |
381 | in the cases it can't handle. */ | |
382 | void | |
dbb41be1 KB |
383 | generic_search (int len, char *data, char *mask, CORE_ADDR startaddr, |
384 | int increment, CORE_ADDR lorange, CORE_ADDR hirange, | |
385 | CORE_ADDR *addr_found, char *data_found) | |
c906108c SS |
386 | { |
387 | int i; | |
388 | CORE_ADDR curaddr = startaddr; | |
389 | ||
390 | while (curaddr >= lorange && curaddr < hirange) | |
391 | { | |
392 | read_memory (curaddr, data_found, len); | |
393 | for (i = 0; i < len; ++i) | |
394 | if ((data_found[i] & mask[i]) != data[i]) | |
395 | goto try_again; | |
396 | /* It matches. */ | |
397 | *addr_found = curaddr; | |
398 | return; | |
399 | ||
400 | try_again: | |
401 | curaddr += increment; | |
402 | } | |
c5aa993b | 403 | *addr_found = (CORE_ADDR) 0; |
c906108c SS |
404 | return; |
405 | } | |
406 | #endif /* 0 */ | |
407 | \f | |
408 | /* The current default bfd target. Points to storage allocated for | |
409 | gnutarget_string. */ | |
410 | char *gnutarget; | |
411 | ||
412 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
413 | static char *gnutarget_string; | |
920d2a44 AC |
414 | static void |
415 | show_gnutarget_string (struct ui_file *file, int from_tty, | |
416 | struct cmd_list_element *c, const char *value) | |
417 | { | |
418 | fprintf_filtered (file, _("The current BFD target is \"%s\".\n"), value); | |
419 | } | |
c906108c | 420 | |
a14ed312 | 421 | static void set_gnutarget_command (char *, int, struct cmd_list_element *); |
c906108c SS |
422 | |
423 | static void | |
fba45db2 | 424 | set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c | 425 | { |
bde58177 | 426 | if (strcmp (gnutarget_string, "auto") == 0) |
c906108c SS |
427 | gnutarget = NULL; |
428 | else | |
429 | gnutarget = gnutarget_string; | |
430 | } | |
431 | ||
432 | /* Set the gnutarget. */ | |
433 | void | |
fba45db2 | 434 | set_gnutarget (char *newtarget) |
c906108c SS |
435 | { |
436 | if (gnutarget_string != NULL) | |
b8c9b27d | 437 | xfree (gnutarget_string); |
c906108c SS |
438 | gnutarget_string = savestring (newtarget, strlen (newtarget)); |
439 | set_gnutarget_command (NULL, 0, NULL); | |
440 | } | |
441 | ||
442 | void | |
fba45db2 | 443 | _initialize_core (void) |
c906108c SS |
444 | { |
445 | struct cmd_list_element *c; | |
1a966eab AC |
446 | c = add_cmd ("core-file", class_files, core_file_command, _("\ |
447 | Use FILE as core dump for examining memory and registers.\n\ | |
c906108c | 448 | No arg means have no core file. This command has been superseded by the\n\ |
1a966eab | 449 | `target core' and `detach' commands."), &cmdlist); |
5ba2abeb | 450 | set_cmd_completer (c, filename_completer); |
c906108c | 451 | |
26c41df3 AC |
452 | |
453 | add_setshow_string_noescape_cmd ("gnutarget", class_files, | |
454 | &gnutarget_string, _("(\ | |
455 | Set the current BFD target."), _("\ | |
456 | Show the current BFD target."), _("\ | |
457 | Use `set gnutarget auto' to specify automatic detection."), | |
458 | set_gnutarget_command, | |
920d2a44 | 459 | show_gnutarget_string, |
26c41df3 | 460 | &setlist, &showlist); |
c906108c SS |
461 | |
462 | if (getenv ("GNUTARGET")) | |
463 | set_gnutarget (getenv ("GNUTARGET")); | |
464 | else | |
465 | set_gnutarget ("auto"); | |
466 | } |