Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Core dump and executable file functions above target vector, for GDB. |
d9fcf2fb | 2 | Copyright 1986, 1987, 1989, 1991-1994, 2000 |
c906108c SS |
3 | Free Software Foundation, Inc. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
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. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "gdb_string.h" | |
24 | #include <errno.h> | |
25 | #include <signal.h> | |
26 | #include <fcntl.h> | |
c5aa993b | 27 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
28 | #include "inferior.h" |
29 | #include "symtab.h" | |
30 | #include "command.h" | |
31 | #include "gdbcmd.h" | |
32 | #include "bfd.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
35 | #include "dis-asm.h" | |
36 | #include "language.h" | |
37 | #include "gdb_stat.h" | |
38 | #include "symfile.h" | |
39 | #include "objfiles.h" | |
40 | ||
c906108c SS |
41 | /* Local function declarations. */ |
42 | ||
a14ed312 KB |
43 | extern void _initialize_core (void); |
44 | static void call_extra_exec_file_hooks (char *filename); | |
c906108c SS |
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 | ||
507f3c78 | 54 | typedef void (*hook_type) (char *); |
c906108c | 55 | |
c5aa993b | 56 | hook_type exec_file_display_hook; /* the original hook */ |
c906108c | 57 | static hook_type *exec_file_extra_hooks; /* array of additional hooks */ |
c5aa993b | 58 | static int exec_file_hook_count = 0; /* size of array */ |
c906108c SS |
59 | |
60 | /* Binary file diddling handle for the core file. */ | |
61 | ||
62 | bfd *core_bfd = NULL; | |
c906108c | 63 | \f |
c5aa993b | 64 | |
c906108c SS |
65 | /* Backward compatability with old way of specifying core files. */ |
66 | ||
67 | void | |
fba45db2 | 68 | core_file_command (char *filename, int from_tty) |
c906108c SS |
69 | { |
70 | struct target_ops *t; | |
71 | ||
c5aa993b | 72 | dont_repeat (); /* Either way, seems bogus. */ |
c906108c SS |
73 | |
74 | t = find_core_target (); | |
75 | if (t != NULL) | |
76 | if (!filename) | |
77 | (t->to_detach) (filename, from_tty); | |
78 | else | |
79 | { | |
c5aa993b JM |
80 | /* Yes, we were given the path of a core file. Do we already |
81 | have a symbol file? If not, can we determine it from the | |
82 | core file? If we can, do so. | |
83 | */ | |
c906108c | 84 | #ifdef HPUXHPPA |
c5aa993b JM |
85 | if (symfile_objfile == NULL) |
86 | { | |
87 | char *symfile; | |
88 | symfile = t->to_core_file_to_sym_file (filename); | |
89 | if (symfile) | |
90 | { | |
c2d11a7d | 91 | char *symfile_copy = xstrdup (symfile); |
c5aa993b JM |
92 | |
93 | make_cleanup (free, symfile_copy); | |
94 | symbol_file_command (symfile_copy, from_tty); | |
95 | } | |
96 | else | |
97 | warning ("Unknown symbols for '%s'; use the 'symbol-file' command.", filename); | |
98 | } | |
c906108c | 99 | #endif |
c5aa993b | 100 | (t->to_open) (filename, from_tty); |
c906108c SS |
101 | } |
102 | else | |
103 | error ("GDB can't read core files on this machine."); | |
104 | } | |
c906108c | 105 | \f |
c5aa993b | 106 | |
c906108c SS |
107 | /* If there are two or more functions that wish to hook into exec_file_command, |
108 | * this function will call all of the hook functions. */ | |
109 | ||
110 | static void | |
fba45db2 | 111 | call_extra_exec_file_hooks (char *filename) |
c906108c SS |
112 | { |
113 | int i; | |
114 | ||
115 | for (i = 0; i < exec_file_hook_count; i++) | |
c5aa993b | 116 | (*exec_file_extra_hooks[i]) (filename); |
c906108c SS |
117 | } |
118 | ||
119 | /* Call this to specify the hook for exec_file_command to call back. | |
120 | This is called from the x-window display code. */ | |
121 | ||
122 | void | |
dbb41be1 | 123 | specify_exec_file_hook (void (*hook) (char *)) |
c906108c SS |
124 | { |
125 | hook_type *new_array; | |
126 | ||
127 | if (exec_file_display_hook != NULL) | |
128 | { | |
129 | /* There's already a hook installed. Arrange to have both it | |
130 | * and the subsequent hooks called. */ | |
131 | if (exec_file_hook_count == 0) | |
132 | { | |
133 | /* If this is the first extra hook, initialize the hook array. */ | |
c5aa993b | 134 | exec_file_extra_hooks = (hook_type *) xmalloc (sizeof (hook_type)); |
c906108c SS |
135 | exec_file_extra_hooks[0] = exec_file_display_hook; |
136 | exec_file_display_hook = call_extra_exec_file_hooks; | |
137 | exec_file_hook_count = 1; | |
138 | } | |
139 | ||
140 | /* Grow the hook array by one and add the new hook to the end. | |
141 | Yes, it's inefficient to grow it by one each time but since | |
142 | this is hardly ever called it's not a big deal. */ | |
143 | exec_file_hook_count++; | |
144 | new_array = | |
145 | (hook_type *) xrealloc (exec_file_extra_hooks, | |
c5aa993b | 146 | exec_file_hook_count * sizeof (hook_type)); |
c906108c SS |
147 | exec_file_extra_hooks = new_array; |
148 | exec_file_extra_hooks[exec_file_hook_count - 1] = hook; | |
149 | } | |
150 | else | |
151 | exec_file_display_hook = hook; | |
152 | } | |
153 | ||
154 | /* The exec file must be closed before running an inferior. | |
155 | If it is needed again after the inferior dies, it must | |
156 | be reopened. */ | |
157 | ||
158 | void | |
fba45db2 | 159 | close_exec_file (void) |
c906108c | 160 | { |
c5aa993b | 161 | #if 0 /* FIXME */ |
c906108c SS |
162 | if (exec_bfd) |
163 | bfd_tempclose (exec_bfd); | |
164 | #endif | |
165 | } | |
166 | ||
167 | void | |
fba45db2 | 168 | reopen_exec_file (void) |
c906108c | 169 | { |
c5aa993b | 170 | #if 0 /* FIXME */ |
c906108c SS |
171 | if (exec_bfd) |
172 | bfd_reopen (exec_bfd); | |
173 | #else | |
174 | char *filename; | |
175 | int res; | |
176 | struct stat st; | |
177 | long mtime; | |
178 | ||
179 | /* Don't do anything if the current target isn't exec. */ | |
180 | if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) | |
181 | return; | |
c5aa993b | 182 | |
c906108c | 183 | /* If the timestamp of the exec file has changed, reopen it. */ |
c2d11a7d | 184 | filename = xstrdup (bfd_get_filename (exec_bfd)); |
c906108c | 185 | make_cleanup (free, filename); |
c5aa993b | 186 | mtime = bfd_get_mtime (exec_bfd); |
c906108c SS |
187 | res = stat (filename, &st); |
188 | ||
189 | if (mtime && mtime != st.st_mtime) | |
190 | exec_file_command (filename, 0); | |
191 | #endif | |
192 | } | |
193 | \f | |
194 | /* If we have both a core file and an exec file, | |
195 | print a warning if they don't go together. */ | |
196 | ||
197 | void | |
fba45db2 | 198 | validate_files (void) |
c906108c SS |
199 | { |
200 | if (exec_bfd && core_bfd) | |
201 | { | |
202 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) | |
203 | warning ("core file may not match specified executable file."); | |
c5aa993b | 204 | else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd)) |
c906108c SS |
205 | warning ("exec file is newer than core file."); |
206 | } | |
207 | } | |
208 | ||
209 | /* Return the name of the executable file as a string. | |
210 | ERR nonzero means get error if there is none specified; | |
211 | otherwise return 0 in that case. */ | |
212 | ||
213 | char * | |
fba45db2 | 214 | get_exec_file (int err) |
c906108c | 215 | { |
c5aa993b JM |
216 | if (exec_bfd) |
217 | return bfd_get_filename (exec_bfd); | |
218 | if (!err) | |
219 | return NULL; | |
c906108c SS |
220 | |
221 | error ("No executable file specified.\n\ | |
222 | Use the \"file\" or \"exec-file\" command."); | |
223 | return NULL; | |
224 | } | |
c906108c | 225 | \f |
c5aa993b | 226 | |
c906108c SS |
227 | /* Report a memory error with error(). */ |
228 | ||
229 | void | |
fba45db2 | 230 | memory_error (int status, CORE_ADDR memaddr) |
c906108c | 231 | { |
d9fcf2fb JM |
232 | struct ui_file *tmp_stream = mem_fileopen (); |
233 | make_cleanup_ui_file_delete (tmp_stream); | |
2acceee2 | 234 | |
c906108c SS |
235 | if (status == EIO) |
236 | { | |
237 | /* Actually, address between memaddr and memaddr + len | |
c5aa993b | 238 | was out of bounds. */ |
2acceee2 JM |
239 | fprintf_unfiltered (tmp_stream, "Cannot access memory at address "); |
240 | print_address_numeric (memaddr, 1, tmp_stream); | |
c906108c SS |
241 | } |
242 | else | |
243 | { | |
2acceee2 JM |
244 | fprintf_filtered (tmp_stream, "Error accessing memory address "); |
245 | print_address_numeric (memaddr, 1, tmp_stream); | |
246 | fprintf_filtered (tmp_stream, ": %s.", | |
c5aa993b | 247 | safe_strerror (status)); |
c906108c | 248 | } |
2acceee2 JM |
249 | |
250 | error_stream (tmp_stream); | |
c906108c SS |
251 | } |
252 | ||
253 | /* Same as target_read_memory, but report an error if can't read. */ | |
254 | void | |
fba45db2 | 255 | read_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
256 | { |
257 | int status; | |
258 | status = target_read_memory (memaddr, myaddr, len); | |
259 | if (status != 0) | |
260 | memory_error (status, memaddr); | |
261 | } | |
262 | ||
c906108c | 263 | /* Like target_read_memory, but slightly different parameters. */ |
c906108c | 264 | int |
fba45db2 KB |
265 | dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len, |
266 | disassemble_info *info) | |
c906108c SS |
267 | { |
268 | return target_read_memory (memaddr, (char *) myaddr, len); | |
269 | } | |
270 | ||
271 | /* Like memory_error with slightly different parameters. */ | |
272 | void | |
fba45db2 | 273 | dis_asm_memory_error (int status, bfd_vma memaddr, disassemble_info *info) |
c906108c SS |
274 | { |
275 | memory_error (status, memaddr); | |
276 | } | |
277 | ||
278 | /* Like print_address with slightly different parameters. */ | |
279 | void | |
fba45db2 | 280 | dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) |
c906108c SS |
281 | { |
282 | print_address (addr, info->stream); | |
283 | } | |
284 | ||
285 | /* Same as target_write_memory, but report an error if can't write. */ | |
286 | void | |
fba45db2 | 287 | write_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
288 | { |
289 | int status; | |
290 | ||
291 | status = target_write_memory (memaddr, myaddr, len); | |
292 | if (status != 0) | |
293 | memory_error (status, memaddr); | |
294 | } | |
295 | ||
296 | /* Read an integer from debugged memory, given address and number of bytes. */ | |
297 | ||
298 | LONGEST | |
fba45db2 | 299 | read_memory_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
300 | { |
301 | char buf[sizeof (LONGEST)]; | |
302 | ||
303 | read_memory (memaddr, buf, len); | |
304 | return extract_signed_integer (buf, len); | |
305 | } | |
306 | ||
307 | ULONGEST | |
fba45db2 | 308 | read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
309 | { |
310 | char buf[sizeof (ULONGEST)]; | |
311 | ||
312 | read_memory (memaddr, buf, len); | |
313 | return extract_unsigned_integer (buf, len); | |
314 | } | |
315 | ||
316 | void | |
fba45db2 | 317 | read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
c906108c | 318 | { |
c5aa993b | 319 | register char *cp; |
c906108c SS |
320 | register int i; |
321 | int cnt; | |
322 | ||
323 | cp = buffer; | |
324 | while (1) | |
325 | { | |
326 | if (cp - buffer >= max_len) | |
c5aa993b JM |
327 | { |
328 | buffer[max_len - 1] = '\0'; | |
329 | break; | |
330 | } | |
c906108c SS |
331 | cnt = max_len - (cp - buffer); |
332 | if (cnt > 8) | |
333 | cnt = 8; | |
334 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
335 | for (i = 0; i < cnt && *cp; i++, cp++) | |
c5aa993b | 336 | ; /* null body */ |
c906108c SS |
337 | |
338 | if (i < cnt && !*cp) | |
c5aa993b | 339 | break; |
c906108c SS |
340 | } |
341 | } | |
c906108c | 342 | \f |
c5aa993b | 343 | |
c906108c SS |
344 | #if 0 |
345 | /* Enable after 4.12. It is not tested. */ | |
346 | ||
347 | /* Search code. Targets can just make this their search function, or | |
348 | if the protocol has a less general search function, they can call this | |
349 | in the cases it can't handle. */ | |
350 | void | |
dbb41be1 KB |
351 | generic_search (int len, char *data, char *mask, CORE_ADDR startaddr, |
352 | int increment, CORE_ADDR lorange, CORE_ADDR hirange, | |
353 | CORE_ADDR *addr_found, char *data_found) | |
c906108c SS |
354 | { |
355 | int i; | |
356 | CORE_ADDR curaddr = startaddr; | |
357 | ||
358 | while (curaddr >= lorange && curaddr < hirange) | |
359 | { | |
360 | read_memory (curaddr, data_found, len); | |
361 | for (i = 0; i < len; ++i) | |
362 | if ((data_found[i] & mask[i]) != data[i]) | |
363 | goto try_again; | |
364 | /* It matches. */ | |
365 | *addr_found = curaddr; | |
366 | return; | |
367 | ||
368 | try_again: | |
369 | curaddr += increment; | |
370 | } | |
c5aa993b | 371 | *addr_found = (CORE_ADDR) 0; |
c906108c SS |
372 | return; |
373 | } | |
374 | #endif /* 0 */ | |
375 | \f | |
376 | /* The current default bfd target. Points to storage allocated for | |
377 | gnutarget_string. */ | |
378 | char *gnutarget; | |
379 | ||
380 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
381 | static char *gnutarget_string; | |
382 | ||
a14ed312 | 383 | static void set_gnutarget_command (char *, int, struct cmd_list_element *); |
c906108c SS |
384 | |
385 | static void | |
fba45db2 | 386 | set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c SS |
387 | { |
388 | if (STREQ (gnutarget_string, "auto")) | |
389 | gnutarget = NULL; | |
390 | else | |
391 | gnutarget = gnutarget_string; | |
392 | } | |
393 | ||
394 | /* Set the gnutarget. */ | |
395 | void | |
fba45db2 | 396 | set_gnutarget (char *newtarget) |
c906108c SS |
397 | { |
398 | if (gnutarget_string != NULL) | |
399 | free (gnutarget_string); | |
400 | gnutarget_string = savestring (newtarget, strlen (newtarget)); | |
401 | set_gnutarget_command (NULL, 0, NULL); | |
402 | } | |
403 | ||
404 | void | |
fba45db2 | 405 | _initialize_core (void) |
c906108c SS |
406 | { |
407 | struct cmd_list_element *c; | |
408 | c = add_cmd ("core-file", class_files, core_file_command, | |
409 | "Use FILE as core dump for examining memory and registers.\n\ | |
410 | No arg means have no core file. This command has been superseded by the\n\ | |
411 | `target core' and `detach' commands.", &cmdlist); | |
412 | c->completer = filename_completer; | |
413 | ||
414 | c = add_set_cmd ("gnutarget", class_files, var_string_noescape, | |
c5aa993b JM |
415 | (char *) &gnutarget_string, |
416 | "Set the current BFD target.\n\ | |
c906108c | 417 | Use `set gnutarget auto' to specify automatic detection.", |
c5aa993b | 418 | &setlist); |
c906108c SS |
419 | c->function.sfunc = set_gnutarget_command; |
420 | add_show_from_set (c, &showlist); | |
421 | ||
422 | if (getenv ("GNUTARGET")) | |
423 | set_gnutarget (getenv ("GNUTARGET")); | |
424 | else | |
425 | set_gnutarget ("auto"); | |
426 | } |