Commit | Line | Data |
---|---|---|
8afd6ca5 | 1 | /* Core dump and executable file functions above target vector, for GDB. |
ba47c66a PS |
2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994 |
3 | Free Software Foundation, Inc. | |
dd3b648e RP |
4 | |
5 | This file is part of GDB. | |
6 | ||
99a7de40 | 7 | This program is free software; you can redistribute it and/or modify |
dd3b648e | 8 | it under the terms of the GNU General Public License as published by |
99a7de40 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
dd3b648e | 11 | |
99a7de40 | 12 | This program is distributed in the hope that it will be useful, |
dd3b648e RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
99a7de40 | 18 | along with this program; if not, write to the Free Software |
6c9638b4 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
dd3b648e | 20 | |
d747e0af | 21 | #include "defs.h" |
2b576293 | 22 | #include "gdb_string.h" |
dd3b648e RP |
23 | #include <errno.h> |
24 | #include <signal.h> | |
bdbd5f50 | 25 | #include <fcntl.h> |
dd3b648e RP |
26 | #include "frame.h" /* required by inferior.h */ |
27 | #include "inferior.h" | |
28 | #include "symtab.h" | |
29 | #include "command.h" | |
df0f0dcc | 30 | #include "gdbcmd.h" |
dd3b648e RP |
31 | #include "bfd.h" |
32 | #include "target.h" | |
33 | #include "gdbcore.h" | |
5d0734a7 | 34 | #include "dis-asm.h" |
100f92e2 | 35 | #include "language.h" |
091d7302 | 36 | #include "gdb_stat.h" |
65b07ddc DT |
37 | #include "symfile.h" |
38 | #include "objfiles.h" | |
dd3b648e | 39 | |
dd3b648e RP |
40 | extern char registers[]; |
41 | ||
f9fedc48 | 42 | /* Local function declarations. */ |
dd3b648e | 43 | |
f9fedc48 MA |
44 | static void call_extra_exec_file_hooks PARAMS ((char *filename)); |
45 | ||
46 | /* You can have any number of hooks for `exec_file_command' command to call. | |
47 | If there's only one hook, it is set in exec_file_display hook. | |
48 | If there are two or more hooks, they are set in exec_file_extra_hooks[], | |
49 | and exec_file_display_hook is set to a function that calls all of them. | |
50 | This extra complexity is needed to preserve compatibility with | |
51 | old code that assumed that only one hook could be set, and which called | |
52 | exec_file_display_hook directly. */ | |
53 | ||
54 | typedef void (*hook_type) PARAMS ((char *)); | |
55 | ||
56 | hook_type exec_file_display_hook; /* the original hook */ | |
57 | static hook_type *exec_file_extra_hooks; /* array of additional hooks */ | |
58 | static int exec_file_hook_count = 0; /* size of array */ | |
dd3b648e | 59 | |
dd3b648e RP |
60 | /* Binary file diddling handle for the core file. */ |
61 | ||
62 | bfd *core_bfd = NULL; | |
63 | ||
dd3b648e | 64 | \f |
dd3b648e RP |
65 | /* Backward compatability with old way of specifying core files. */ |
66 | ||
67 | void | |
68 | core_file_command (filename, from_tty) | |
69 | char *filename; | |
70 | int from_tty; | |
71 | { | |
df9b3bfc | 72 | struct target_ops *t; |
327f7197 | 73 | |
3f2e006b | 74 | dont_repeat (); /* Either way, seems bogus. */ |
8afd6ca5 | 75 | |
df9b3bfc RP |
76 | t = find_core_target (); |
77 | if (t != NULL) | |
78 | if (!filename) | |
79 | (t->to_detach) (filename, from_tty); | |
80 | else | |
65b07ddc DT |
81 | { |
82 | /* Yes, we were given the path of a core file. Do we already | |
83 | have a symbol file? If not, can we determine it from the | |
84 | core file? If we can, do so. | |
85 | */ | |
86 | #ifdef HPUXHPPA | |
87 | if (symfile_objfile == NULL) | |
88 | { | |
89 | char * symfile; | |
90 | symfile = t->to_core_file_to_sym_file (filename); | |
91 | if (symfile) | |
92 | { | |
93 | char * symfile_copy = strdup (symfile); | |
94 | ||
95 | make_cleanup (free, symfile_copy); | |
96 | symbol_file_command (symfile_copy, from_tty); | |
97 | } | |
98 | else | |
99 | warning ("Unknown symbols for '%s'; use the 'symbol-file' command.", filename); | |
100 | } | |
101 | #endif | |
102 | (t->to_open) (filename, from_tty); | |
103 | } | |
dd3b648e | 104 | else |
327f7197 | 105 | error ("GDB can't read core files on this machine."); |
dd3b648e RP |
106 | } |
107 | ||
108 | \f | |
f9fedc48 MA |
109 | /* If there are two or more functions that wish to hook into exec_file_command, |
110 | * this function will call all of the hook functions. */ | |
111 | ||
112 | static void | |
113 | call_extra_exec_file_hooks (filename) | |
114 | char *filename; | |
115 | { | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < exec_file_hook_count; i++) | |
119 | (*exec_file_extra_hooks[i])(filename); | |
120 | } | |
121 | ||
dd3b648e RP |
122 | /* Call this to specify the hook for exec_file_command to call back. |
123 | This is called from the x-window display code. */ | |
124 | ||
125 | void | |
126 | specify_exec_file_hook (hook) | |
7ed0f002 | 127 | void (*hook) PARAMS ((char *)); |
dd3b648e | 128 | { |
f9fedc48 MA |
129 | hook_type *new_array; |
130 | ||
131 | if (exec_file_display_hook != NULL) | |
132 | { | |
133 | /* There's already a hook installed. Arrange to have both it | |
134 | * and the subsequent hooks called. */ | |
135 | if (exec_file_hook_count == 0) | |
136 | { | |
137 | /* If this is the first extra hook, initialize the hook array. */ | |
138 | exec_file_extra_hooks = (hook_type *) xmalloc (sizeof(hook_type)); | |
139 | exec_file_extra_hooks[0] = exec_file_display_hook; | |
140 | exec_file_display_hook = call_extra_exec_file_hooks; | |
141 | exec_file_hook_count = 1; | |
142 | } | |
143 | ||
144 | /* Grow the hook array by one and add the new hook to the end. | |
145 | Yes, it's inefficient to grow it by one each time but since | |
146 | this is hardly ever called it's not a big deal. */ | |
147 | exec_file_hook_count++; | |
148 | new_array = | |
149 | (hook_type *) xrealloc (exec_file_extra_hooks, | |
150 | exec_file_hook_count * sizeof(hook_type)); | |
151 | exec_file_extra_hooks = new_array; | |
152 | exec_file_extra_hooks[exec_file_hook_count - 1] = hook; | |
153 | } | |
154 | else | |
155 | exec_file_display_hook = hook; | |
dd3b648e RP |
156 | } |
157 | ||
158 | /* The exec file must be closed before running an inferior. | |
159 | If it is needed again after the inferior dies, it must | |
160 | be reopened. */ | |
161 | ||
162 | void | |
163 | close_exec_file () | |
164 | { | |
28444bf3 | 165 | #if 0 /* FIXME */ |
dd3b648e RP |
166 | if (exec_bfd) |
167 | bfd_tempclose (exec_bfd); | |
168 | #endif | |
169 | } | |
170 | ||
171 | void | |
172 | reopen_exec_file () | |
173 | { | |
28444bf3 | 174 | #if 0 /* FIXME */ |
dd3b648e RP |
175 | if (exec_bfd) |
176 | bfd_reopen (exec_bfd); | |
091d7302 MA |
177 | #else |
178 | char *filename; | |
179 | int res; | |
180 | struct stat st; | |
181 | long mtime; | |
182 | ||
183 | /* Don't do anything if the current target isn't exec. */ | |
184 | if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) | |
185 | return; | |
186 | ||
187 | /* If the timestamp of the exec file has changed, reopen it. */ | |
188 | filename = strdup (bfd_get_filename (exec_bfd)); | |
189 | make_cleanup (free, filename); | |
190 | mtime = bfd_get_mtime(exec_bfd); | |
191 | res = stat (filename, &st); | |
192 | ||
193 | if (mtime && mtime != st.st_mtime) | |
194 | exec_file_command (filename, 0); | |
dd3b648e RP |
195 | #endif |
196 | } | |
197 | \f | |
198 | /* If we have both a core file and an exec file, | |
c561ca5d | 199 | print a warning if they don't go together. */ |
dd3b648e RP |
200 | |
201 | void | |
202 | validate_files () | |
203 | { | |
204 | if (exec_bfd && core_bfd) | |
205 | { | |
bdbd5f50 | 206 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) |
c8094777 | 207 | warning ("core file may not match specified executable file."); |
dd3b648e | 208 | else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd)) |
c8094777 | 209 | warning ("exec file is newer than core file."); |
dd3b648e RP |
210 | } |
211 | } | |
212 | ||
213 | /* Return the name of the executable file as a string. | |
214 | ERR nonzero means get error if there is none specified; | |
215 | otherwise return 0 in that case. */ | |
216 | ||
217 | char * | |
218 | get_exec_file (err) | |
219 | int err; | |
220 | { | |
221 | if (exec_bfd) return bfd_get_filename(exec_bfd); | |
222 | if (!err) return NULL; | |
223 | ||
224 | error ("No executable file specified.\n\ | |
225 | Use the \"file\" or \"exec-file\" command."); | |
226 | return NULL; | |
227 | } | |
228 | ||
dd3b648e | 229 | \f |
7ed0f002 JG |
230 | /* Report a memory error with error(). */ |
231 | ||
dd3b648e RP |
232 | void |
233 | memory_error (status, memaddr) | |
234 | int status; | |
235 | CORE_ADDR memaddr; | |
236 | { | |
dd3b648e RP |
237 | if (status == EIO) |
238 | { | |
239 | /* Actually, address between memaddr and memaddr + len | |
240 | was out of bounds. */ | |
a0cf4681 | 241 | error_begin (); |
e16b9023 | 242 | printf_filtered ("Cannot access memory at address "); |
d24c0599 | 243 | print_address_numeric (memaddr, 1, gdb_stdout); |
e16b9023 | 244 | printf_filtered (".\n"); |
a0cf4681 | 245 | return_to_top_level (RETURN_ERROR); |
dd3b648e RP |
246 | } |
247 | else | |
248 | { | |
a0cf4681 | 249 | error_begin (); |
e16b9023 | 250 | printf_filtered ("Error accessing memory address "); |
d24c0599 | 251 | print_address_numeric (memaddr, 1, gdb_stdout); |
e16b9023 | 252 | printf_filtered (": %s.\n", |
a0cf4681 JK |
253 | safe_strerror (status)); |
254 | return_to_top_level (RETURN_ERROR); | |
dd3b648e RP |
255 | } |
256 | } | |
257 | ||
258 | /* Same as target_read_memory, but report an error if can't read. */ | |
259 | void | |
260 | read_memory (memaddr, myaddr, len) | |
261 | CORE_ADDR memaddr; | |
262 | char *myaddr; | |
263 | int len; | |
264 | { | |
265 | int status; | |
266 | status = target_read_memory (memaddr, myaddr, len); | |
267 | if (status != 0) | |
268 | memory_error (status, memaddr); | |
269 | } | |
270 | ||
6c310da8 SG |
271 | void |
272 | read_memory_section (memaddr, myaddr, len, bfd_section) | |
273 | CORE_ADDR memaddr; | |
274 | char *myaddr; | |
275 | int len; | |
276 | asection *bfd_section; | |
277 | { | |
278 | int status; | |
279 | status = target_read_memory_section (memaddr, myaddr, len, bfd_section); | |
280 | if (status != 0) | |
281 | memory_error (status, memaddr); | |
282 | } | |
283 | ||
720b3aed | 284 | /* Like target_read_memory, but slightly different parameters. */ |
bf097a0b | 285 | |
5d0734a7 | 286 | int |
a6cead71 | 287 | dis_asm_read_memory (memaddr, myaddr, len, info) |
5d0734a7 JK |
288 | bfd_vma memaddr; |
289 | bfd_byte *myaddr; | |
290 | int len; | |
a6cead71 | 291 | disassemble_info *info; |
5d0734a7 | 292 | { |
34b70237 | 293 | return target_read_memory (memaddr, (char *) myaddr, len); |
5d0734a7 JK |
294 | } |
295 | ||
296 | /* Like memory_error with slightly different parameters. */ | |
297 | void | |
298 | dis_asm_memory_error (status, memaddr, info) | |
299 | int status; | |
300 | bfd_vma memaddr; | |
301 | disassemble_info *info; | |
302 | { | |
303 | memory_error (status, memaddr); | |
304 | } | |
305 | ||
720b3aed JK |
306 | /* Like print_address with slightly different parameters. */ |
307 | void | |
308 | dis_asm_print_address (addr, info) | |
309 | bfd_vma addr; | |
310 | struct disassemble_info *info; | |
311 | { | |
312 | print_address (addr, info->stream); | |
313 | } | |
314 | ||
dd3b648e RP |
315 | /* Same as target_write_memory, but report an error if can't write. */ |
316 | void | |
317 | write_memory (memaddr, myaddr, len) | |
318 | CORE_ADDR memaddr; | |
319 | char *myaddr; | |
320 | int len; | |
321 | { | |
322 | int status; | |
323 | ||
324 | status = target_write_memory (memaddr, myaddr, len); | |
325 | if (status != 0) | |
326 | memory_error (status, memaddr); | |
327 | } | |
328 | ||
329 | /* Read an integer from debugged memory, given address and number of bytes. */ | |
330 | ||
34df79fc | 331 | LONGEST |
dd3b648e RP |
332 | read_memory_integer (memaddr, len) |
333 | CORE_ADDR memaddr; | |
334 | int len; | |
335 | { | |
58e49e21 | 336 | char buf[sizeof (LONGEST)]; |
dd3b648e | 337 | |
34df79fc JK |
338 | read_memory (memaddr, buf, len); |
339 | return extract_signed_integer (buf, len); | |
dd3b648e | 340 | } |
86a5593e | 341 | |
119dfbb7 | 342 | ULONGEST |
86a5593e SC |
343 | read_memory_unsigned_integer (memaddr, len) |
344 | CORE_ADDR memaddr; | |
345 | int len; | |
346 | { | |
119dfbb7 | 347 | char buf[sizeof (ULONGEST)]; |
86a5593e | 348 | |
34df79fc JK |
349 | read_memory (memaddr, buf, len); |
350 | return extract_unsigned_integer (buf, len); | |
86a5593e | 351 | } |
4ef1f467 DT |
352 | |
353 | void | |
354 | read_memory_string (memaddr, buffer, max_len) | |
355 | CORE_ADDR memaddr; | |
356 | char * buffer; | |
357 | int max_len; | |
358 | { | |
359 | register char * cp; | |
360 | register int i; | |
361 | int cnt; | |
362 | ||
363 | cp = buffer; | |
364 | while (1) | |
365 | { | |
366 | if (cp - buffer >= max_len) | |
367 | { | |
368 | buffer[max_len - 1] = '\0'; | |
369 | break; | |
370 | } | |
371 | cnt = max_len - (cp - buffer); | |
372 | if (cnt > 8) | |
373 | cnt = 8; | |
374 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
375 | for (i = 0; i < cnt && *cp; i++, cp++) | |
376 | ; /* null body */ | |
377 | ||
378 | if (i < cnt && !*cp) | |
379 | break; | |
380 | } | |
381 | } | |
382 | ||
dd3b648e | 383 | \f |
63dcc380 JK |
384 | #if 0 |
385 | /* Enable after 4.12. It is not tested. */ | |
386 | ||
387 | /* Search code. Targets can just make this their search function, or | |
388 | if the protocol has a less general search function, they can call this | |
389 | in the cases it can't handle. */ | |
390 | void | |
391 | generic_search (len, data, mask, startaddr, increment, lorange, hirange | |
392 | addr_found, data_found) | |
393 | int len; | |
394 | char *data; | |
395 | char *mask; | |
396 | CORE_ADDR startaddr; | |
397 | int increment; | |
398 | CORE_ADDR lorange; | |
399 | CORE_ADDR hirange; | |
400 | CORE_ADDR *addr_found; | |
401 | char *data_found; | |
402 | { | |
403 | int i; | |
404 | CORE_ADDR curaddr = startaddr; | |
405 | ||
406 | while (curaddr >= lorange && curaddr < hirange) | |
407 | { | |
408 | read_memory (curaddr, data_found, len); | |
409 | for (i = 0; i < len; ++i) | |
410 | if ((data_found[i] & mask[i]) != data[i]) | |
411 | goto try_again; | |
412 | /* It matches. */ | |
413 | *addr_found = curaddr; | |
414 | return; | |
415 | ||
416 | try_again: | |
417 | curaddr += increment; | |
418 | } | |
419 | *addr_found = (CORE_ADDR)0; | |
420 | return; | |
421 | } | |
422 | #endif /* 0 */ | |
423 | \f | |
0685d95f JK |
424 | /* The current default bfd target. Points to storage allocated for |
425 | gnutarget_string. */ | |
426 | char *gnutarget; | |
427 | ||
428 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
429 | static char *gnutarget_string; | |
430 | ||
431 | static void set_gnutarget_command | |
432 | PARAMS ((char *, int, struct cmd_list_element *)); | |
433 | ||
434 | static void | |
435 | set_gnutarget_command (ignore, from_tty, c) | |
436 | char *ignore; | |
437 | int from_tty; | |
438 | struct cmd_list_element *c; | |
439 | { | |
440 | if (STREQ (gnutarget_string, "auto")) | |
441 | gnutarget = NULL; | |
442 | else | |
443 | gnutarget = gnutarget_string; | |
444 | } | |
445 | ||
446 | /* Set the gnutarget. */ | |
447 | void | |
448 | set_gnutarget (newtarget) | |
449 | char *newtarget; | |
450 | { | |
451 | if (gnutarget_string != NULL) | |
452 | free (gnutarget_string); | |
453 | gnutarget_string = savestring (newtarget, strlen (newtarget)); | |
454 | set_gnutarget_command (NULL, 0, NULL); | |
455 | } | |
456 | ||
dd3b648e RP |
457 | void |
458 | _initialize_core() | |
459 | { | |
df0f0dcc JK |
460 | struct cmd_list_element *c; |
461 | c = add_cmd ("core-file", class_files, core_file_command, | |
462 | "Use FILE as core dump for examining memory and registers.\n\ | |
dd3b648e | 463 | No arg means have no core file. This command has been superseded by the\n\ |
df0f0dcc JK |
464 | `target core' and `detach' commands.", &cmdlist); |
465 | c->completer = filename_completer; | |
0685d95f JK |
466 | |
467 | c = add_set_cmd ("gnutarget", class_files, var_string_noescape, | |
468 | (char *) &gnutarget_string, | |
469 | "Set the current BFD target.\n\ | |
470 | Use `set gnutarget auto' to specify automatic detection.", | |
471 | &setlist); | |
472 | c->function.sfunc = set_gnutarget_command; | |
473 | add_show_from_set (c, &showlist); | |
474 | ||
475 | if (getenv ("GNUTARGET")) | |
476 | set_gnutarget (getenv ("GNUTARGET")); | |
477 | else | |
478 | set_gnutarget ("auto"); | |
dd3b648e | 479 | } |