Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions above target vector, for GDB. |
1bac305b AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, | |
4 | 1998, 1999, 2000, 2001, 2003 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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "gdb_string.h" | |
25 | #include <errno.h> | |
26 | #include <signal.h> | |
27 | #include <fcntl.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" | |
c906108c | 36 | #include "gdb_stat.h" |
d75b5104 | 37 | #include "completer.h" |
60250e8b | 38 | #include "exceptions.h" |
c906108c | 39 | |
c906108c SS |
40 | /* Local function declarations. */ |
41 | ||
a14ed312 KB |
42 | extern void _initialize_core (void); |
43 | static void call_extra_exec_file_hooks (char *filename); | |
c906108c | 44 | |
9a4105ab AC |
45 | /* You can have any number of hooks for `exec_file_command' command to |
46 | call. If there's only one hook, it is set in exec_file_display | |
47 | hook. If there are two or more hooks, they are set in | |
48 | exec_file_extra_hooks[], and deprecated_exec_file_display_hook is | |
49 | set to a function that calls all of them. This extra complexity is | |
50 | needed to preserve compatibility with old code that assumed that | |
51 | only one hook could be set, and which called | |
52 | deprecated_exec_file_display_hook directly. */ | |
c906108c | 53 | |
507f3c78 | 54 | typedef void (*hook_type) (char *); |
c906108c | 55 | |
9a4105ab | 56 | hook_type deprecated_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 (); | |
46c6cdcf | 75 | if (t == NULL) |
c906108c | 76 | error ("GDB can't read core files on this machine."); |
46c6cdcf C |
77 | |
78 | if (!filename) | |
79 | (t->to_detach) (filename, from_tty); | |
80 | else | |
81 | (t->to_open) (filename, from_tty); | |
c906108c | 82 | } |
c906108c | 83 | \f |
c5aa993b | 84 | |
c906108c SS |
85 | /* If there are two or more functions that wish to hook into exec_file_command, |
86 | * this function will call all of the hook functions. */ | |
87 | ||
88 | static void | |
fba45db2 | 89 | call_extra_exec_file_hooks (char *filename) |
c906108c SS |
90 | { |
91 | int i; | |
92 | ||
93 | for (i = 0; i < exec_file_hook_count; i++) | |
c5aa993b | 94 | (*exec_file_extra_hooks[i]) (filename); |
c906108c SS |
95 | } |
96 | ||
97 | /* Call this to specify the hook for exec_file_command to call back. | |
98 | This is called from the x-window display code. */ | |
99 | ||
100 | void | |
dbb41be1 | 101 | specify_exec_file_hook (void (*hook) (char *)) |
c906108c SS |
102 | { |
103 | hook_type *new_array; | |
104 | ||
9a4105ab | 105 | if (deprecated_exec_file_display_hook != NULL) |
c906108c SS |
106 | { |
107 | /* There's already a hook installed. Arrange to have both it | |
108 | * and the subsequent hooks called. */ | |
109 | if (exec_file_hook_count == 0) | |
110 | { | |
111 | /* If this is the first extra hook, initialize the hook array. */ | |
c5aa993b | 112 | exec_file_extra_hooks = (hook_type *) xmalloc (sizeof (hook_type)); |
9a4105ab AC |
113 | exec_file_extra_hooks[0] = deprecated_exec_file_display_hook; |
114 | deprecated_exec_file_display_hook = call_extra_exec_file_hooks; | |
c906108c SS |
115 | exec_file_hook_count = 1; |
116 | } | |
117 | ||
118 | /* Grow the hook array by one and add the new hook to the end. | |
119 | Yes, it's inefficient to grow it by one each time but since | |
120 | this is hardly ever called it's not a big deal. */ | |
121 | exec_file_hook_count++; | |
122 | new_array = | |
123 | (hook_type *) xrealloc (exec_file_extra_hooks, | |
c5aa993b | 124 | exec_file_hook_count * sizeof (hook_type)); |
c906108c SS |
125 | exec_file_extra_hooks = new_array; |
126 | exec_file_extra_hooks[exec_file_hook_count - 1] = hook; | |
127 | } | |
128 | else | |
9a4105ab | 129 | deprecated_exec_file_display_hook = hook; |
c906108c SS |
130 | } |
131 | ||
132 | /* The exec file must be closed before running an inferior. | |
133 | If it is needed again after the inferior dies, it must | |
134 | be reopened. */ | |
135 | ||
136 | void | |
fba45db2 | 137 | close_exec_file (void) |
c906108c | 138 | { |
c5aa993b | 139 | #if 0 /* FIXME */ |
c906108c SS |
140 | if (exec_bfd) |
141 | bfd_tempclose (exec_bfd); | |
142 | #endif | |
143 | } | |
144 | ||
145 | void | |
fba45db2 | 146 | reopen_exec_file (void) |
c906108c | 147 | { |
c5aa993b | 148 | #if 0 /* FIXME */ |
c906108c SS |
149 | if (exec_bfd) |
150 | bfd_reopen (exec_bfd); | |
151 | #else | |
152 | char *filename; | |
153 | int res; | |
154 | struct stat st; | |
155 | long mtime; | |
156 | ||
157 | /* Don't do anything if the current target isn't exec. */ | |
158 | if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) | |
159 | return; | |
c5aa993b | 160 | |
c906108c | 161 | /* If the timestamp of the exec file has changed, reopen it. */ |
c2d11a7d | 162 | filename = xstrdup (bfd_get_filename (exec_bfd)); |
b8c9b27d | 163 | make_cleanup (xfree, filename); |
c5aa993b | 164 | mtime = bfd_get_mtime (exec_bfd); |
c906108c SS |
165 | res = stat (filename, &st); |
166 | ||
167 | if (mtime && mtime != st.st_mtime) | |
1adeb98a FN |
168 | { |
169 | exec_open (filename, 0); | |
170 | } | |
c906108c SS |
171 | #endif |
172 | } | |
173 | \f | |
174 | /* If we have both a core file and an exec file, | |
175 | print a warning if they don't go together. */ | |
176 | ||
177 | void | |
fba45db2 | 178 | validate_files (void) |
c906108c SS |
179 | { |
180 | if (exec_bfd && core_bfd) | |
181 | { | |
182 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) | |
183 | warning ("core file may not match specified executable file."); | |
c5aa993b | 184 | else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd)) |
c906108c SS |
185 | warning ("exec file is newer than core file."); |
186 | } | |
187 | } | |
188 | ||
189 | /* Return the name of the executable file as a string. | |
190 | ERR nonzero means get error if there is none specified; | |
191 | otherwise return 0 in that case. */ | |
192 | ||
193 | char * | |
fba45db2 | 194 | get_exec_file (int err) |
c906108c | 195 | { |
c5aa993b JM |
196 | if (exec_bfd) |
197 | return bfd_get_filename (exec_bfd); | |
198 | if (!err) | |
199 | return NULL; | |
c906108c SS |
200 | |
201 | error ("No executable file specified.\n\ | |
202 | Use the \"file\" or \"exec-file\" command."); | |
203 | return NULL; | |
204 | } | |
c906108c | 205 | \f |
c5aa993b | 206 | |
c906108c SS |
207 | /* Report a memory error with error(). */ |
208 | ||
209 | void | |
fba45db2 | 210 | memory_error (int status, CORE_ADDR memaddr) |
c906108c | 211 | { |
d9fcf2fb JM |
212 | struct ui_file *tmp_stream = mem_fileopen (); |
213 | make_cleanup_ui_file_delete (tmp_stream); | |
2acceee2 | 214 | |
c906108c SS |
215 | if (status == EIO) |
216 | { | |
217 | /* Actually, address between memaddr and memaddr + len | |
c5aa993b | 218 | was out of bounds. */ |
2acceee2 JM |
219 | fprintf_unfiltered (tmp_stream, "Cannot access memory at address "); |
220 | print_address_numeric (memaddr, 1, tmp_stream); | |
c906108c SS |
221 | } |
222 | else | |
223 | { | |
2acceee2 JM |
224 | fprintf_filtered (tmp_stream, "Error accessing memory address "); |
225 | print_address_numeric (memaddr, 1, tmp_stream); | |
226 | fprintf_filtered (tmp_stream, ": %s.", | |
c5aa993b | 227 | safe_strerror (status)); |
c906108c | 228 | } |
2acceee2 JM |
229 | |
230 | error_stream (tmp_stream); | |
c906108c SS |
231 | } |
232 | ||
233 | /* Same as target_read_memory, but report an error if can't read. */ | |
234 | void | |
fba45db2 | 235 | read_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
236 | { |
237 | int status; | |
238 | status = target_read_memory (memaddr, myaddr, len); | |
239 | if (status != 0) | |
240 | memory_error (status, memaddr); | |
241 | } | |
242 | ||
ee8ff470 KB |
243 | /* Argument / return result struct for use with |
244 | do_captured_read_memory_integer(). MEMADDR and LEN are filled in | |
245 | by gdb_read_memory_integer(). RESULT is the contents that were | |
246 | successfully read from MEMADDR of length LEN. */ | |
c906108c | 247 | |
16a0f3e7 EZ |
248 | struct captured_read_memory_integer_arguments |
249 | { | |
250 | CORE_ADDR memaddr; | |
251 | int len; | |
252 | LONGEST result; | |
253 | }; | |
254 | ||
ee8ff470 KB |
255 | /* Helper function for gdb_read_memory_integer(). DATA must be a |
256 | pointer to a captured_read_memory_integer_arguments struct. | |
257 | Return 1 if successful. Note that the catch_errors() interface | |
258 | will return 0 if an error occurred while reading memory. This | |
259 | choice of return code is so that we can distinguish between | |
260 | success and failure. */ | |
261 | ||
16a0f3e7 EZ |
262 | static int |
263 | do_captured_read_memory_integer (void *data) | |
264 | { | |
265 | struct captured_read_memory_integer_arguments *args = (struct captured_read_memory_integer_arguments*) data; | |
266 | CORE_ADDR memaddr = args->memaddr; | |
267 | int len = args->len; | |
268 | ||
269 | args->result = read_memory_integer (memaddr, len); | |
270 | ||
ee8ff470 | 271 | return 1; |
16a0f3e7 EZ |
272 | } |
273 | ||
ee8ff470 KB |
274 | /* Read memory at MEMADDR of length LEN and put the contents in |
275 | RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero | |
276 | if successful. */ | |
277 | ||
16a0f3e7 EZ |
278 | int |
279 | safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value) | |
280 | { | |
281 | int status; | |
282 | struct captured_read_memory_integer_arguments args; | |
283 | args.memaddr = memaddr; | |
284 | args.len = len; | |
285 | ||
286 | status = catch_errors (do_captured_read_memory_integer, &args, | |
287 | "", RETURN_MASK_ALL); | |
ee8ff470 | 288 | if (status) |
16a0f3e7 EZ |
289 | *return_value = args.result; |
290 | ||
291 | return status; | |
292 | } | |
293 | ||
c906108c | 294 | LONGEST |
fba45db2 | 295 | read_memory_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
296 | { |
297 | char buf[sizeof (LONGEST)]; | |
298 | ||
299 | read_memory (memaddr, buf, len); | |
300 | return extract_signed_integer (buf, len); | |
301 | } | |
302 | ||
303 | ULONGEST | |
fba45db2 | 304 | read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
305 | { |
306 | char buf[sizeof (ULONGEST)]; | |
307 | ||
308 | read_memory (memaddr, buf, len); | |
309 | return extract_unsigned_integer (buf, len); | |
310 | } | |
311 | ||
312 | void | |
fba45db2 | 313 | read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
c906108c | 314 | { |
52f0bd74 AC |
315 | char *cp; |
316 | int i; | |
c906108c SS |
317 | int cnt; |
318 | ||
319 | cp = buffer; | |
320 | while (1) | |
321 | { | |
322 | if (cp - buffer >= max_len) | |
c5aa993b JM |
323 | { |
324 | buffer[max_len - 1] = '\0'; | |
325 | break; | |
326 | } | |
c906108c SS |
327 | cnt = max_len - (cp - buffer); |
328 | if (cnt > 8) | |
329 | cnt = 8; | |
330 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
331 | for (i = 0; i < cnt && *cp; i++, cp++) | |
c5aa993b | 332 | ; /* null body */ |
c906108c SS |
333 | |
334 | if (i < cnt && !*cp) | |
c5aa993b | 335 | break; |
c906108c SS |
336 | } |
337 | } | |
c26e4683 | 338 | |
0d540cdf KD |
339 | CORE_ADDR |
340 | read_memory_typed_address (CORE_ADDR addr, struct type *type) | |
341 | { | |
342 | char *buf = alloca (TYPE_LENGTH (type)); | |
343 | read_memory (addr, buf, TYPE_LENGTH (type)); | |
344 | return extract_typed_address (buf, type); | |
345 | } | |
346 | ||
c26e4683 JB |
347 | /* Same as target_write_memory, but report an error if can't write. */ |
348 | void | |
349 | write_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
350 | { | |
351 | int status; | |
352 | ||
353 | status = target_write_memory (memaddr, myaddr, len); | |
354 | if (status != 0) | |
355 | memory_error (status, memaddr); | |
356 | } | |
357 | ||
358 | /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ | |
359 | void | |
360 | write_memory_unsigned_integer (CORE_ADDR addr, int len, ULONGEST value) | |
361 | { | |
362 | char *buf = alloca (len); | |
363 | store_unsigned_integer (buf, len, value); | |
364 | write_memory (addr, buf, len); | |
365 | } | |
366 | ||
367 | /* Store VALUE at ADDR in the inferior as a LEN-byte signed integer. */ | |
368 | void | |
369 | write_memory_signed_integer (CORE_ADDR addr, int len, LONGEST value) | |
370 | { | |
371 | char *buf = alloca (len); | |
372 | store_signed_integer (buf, len, value); | |
373 | write_memory (addr, buf, len); | |
374 | } | |
375 | ||
c906108c | 376 | \f |
c5aa993b | 377 | |
c906108c SS |
378 | #if 0 |
379 | /* Enable after 4.12. It is not tested. */ | |
380 | ||
381 | /* Search code. Targets can just make this their search function, or | |
382 | if the protocol has a less general search function, they can call this | |
383 | in the cases it can't handle. */ | |
384 | void | |
dbb41be1 KB |
385 | generic_search (int len, char *data, char *mask, CORE_ADDR startaddr, |
386 | int increment, CORE_ADDR lorange, CORE_ADDR hirange, | |
387 | CORE_ADDR *addr_found, char *data_found) | |
c906108c SS |
388 | { |
389 | int i; | |
390 | CORE_ADDR curaddr = startaddr; | |
391 | ||
392 | while (curaddr >= lorange && curaddr < hirange) | |
393 | { | |
394 | read_memory (curaddr, data_found, len); | |
395 | for (i = 0; i < len; ++i) | |
396 | if ((data_found[i] & mask[i]) != data[i]) | |
397 | goto try_again; | |
398 | /* It matches. */ | |
399 | *addr_found = curaddr; | |
400 | return; | |
401 | ||
402 | try_again: | |
403 | curaddr += increment; | |
404 | } | |
c5aa993b | 405 | *addr_found = (CORE_ADDR) 0; |
c906108c SS |
406 | return; |
407 | } | |
408 | #endif /* 0 */ | |
409 | \f | |
410 | /* The current default bfd target. Points to storage allocated for | |
411 | gnutarget_string. */ | |
412 | char *gnutarget; | |
413 | ||
414 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
415 | static char *gnutarget_string; | |
416 | ||
a14ed312 | 417 | static void set_gnutarget_command (char *, int, struct cmd_list_element *); |
c906108c SS |
418 | |
419 | static void | |
fba45db2 | 420 | set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c | 421 | { |
bde58177 | 422 | if (strcmp (gnutarget_string, "auto") == 0) |
c906108c SS |
423 | gnutarget = NULL; |
424 | else | |
425 | gnutarget = gnutarget_string; | |
426 | } | |
427 | ||
428 | /* Set the gnutarget. */ | |
429 | void | |
fba45db2 | 430 | set_gnutarget (char *newtarget) |
c906108c SS |
431 | { |
432 | if (gnutarget_string != NULL) | |
b8c9b27d | 433 | xfree (gnutarget_string); |
c906108c SS |
434 | gnutarget_string = savestring (newtarget, strlen (newtarget)); |
435 | set_gnutarget_command (NULL, 0, NULL); | |
436 | } | |
437 | ||
438 | void | |
fba45db2 | 439 | _initialize_core (void) |
c906108c SS |
440 | { |
441 | struct cmd_list_element *c; | |
442 | c = add_cmd ("core-file", class_files, core_file_command, | |
443 | "Use FILE as core dump for examining memory and registers.\n\ | |
444 | No arg means have no core file. This command has been superseded by the\n\ | |
445 | `target core' and `detach' commands.", &cmdlist); | |
5ba2abeb | 446 | set_cmd_completer (c, filename_completer); |
c906108c SS |
447 | |
448 | c = add_set_cmd ("gnutarget", class_files, var_string_noescape, | |
c5aa993b JM |
449 | (char *) &gnutarget_string, |
450 | "Set the current BFD target.\n\ | |
c906108c | 451 | Use `set gnutarget auto' to specify automatic detection.", |
c5aa993b | 452 | &setlist); |
9f60d481 | 453 | set_cmd_sfunc (c, set_gnutarget_command); |
cb1a6d5f | 454 | deprecated_add_show_from_set (c, &showlist); |
c906108c SS |
455 | |
456 | if (getenv ("GNUTARGET")) | |
457 | set_gnutarget (getenv ("GNUTARGET")); | |
458 | else | |
459 | set_gnutarget ("auto"); | |
460 | } |