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" |
c906108c | 38 | |
c906108c SS |
39 | /* Local function declarations. */ |
40 | ||
a14ed312 KB |
41 | extern void _initialize_core (void); |
42 | static void call_extra_exec_file_hooks (char *filename); | |
c906108c | 43 | |
9a4105ab AC |
44 | /* You can have any number of hooks for `exec_file_command' command to |
45 | call. If there's only one hook, it is set in exec_file_display | |
46 | hook. If there are two or more hooks, they are set in | |
47 | exec_file_extra_hooks[], and deprecated_exec_file_display_hook is | |
48 | set to a function that calls all of them. This extra complexity is | |
49 | needed to preserve compatibility with old code that assumed that | |
50 | only one hook could be set, and which called | |
51 | deprecated_exec_file_display_hook directly. */ | |
c906108c | 52 | |
507f3c78 | 53 | typedef void (*hook_type) (char *); |
c906108c | 54 | |
9a4105ab | 55 | hook_type deprecated_exec_file_display_hook; /* the original hook */ |
c906108c | 56 | static hook_type *exec_file_extra_hooks; /* array of additional hooks */ |
c5aa993b | 57 | static int exec_file_hook_count = 0; /* size of array */ |
c906108c SS |
58 | |
59 | /* Binary file diddling handle for the core file. */ | |
60 | ||
61 | bfd *core_bfd = NULL; | |
c906108c | 62 | \f |
c5aa993b | 63 | |
c906108c SS |
64 | /* Backward compatability with old way of specifying core files. */ |
65 | ||
66 | void | |
fba45db2 | 67 | core_file_command (char *filename, int from_tty) |
c906108c SS |
68 | { |
69 | struct target_ops *t; | |
70 | ||
c5aa993b | 71 | dont_repeat (); /* Either way, seems bogus. */ |
c906108c SS |
72 | |
73 | t = find_core_target (); | |
46c6cdcf | 74 | if (t == NULL) |
c906108c | 75 | error ("GDB can't read core files on this machine."); |
46c6cdcf C |
76 | |
77 | if (!filename) | |
78 | (t->to_detach) (filename, from_tty); | |
79 | else | |
80 | (t->to_open) (filename, from_tty); | |
c906108c | 81 | } |
c906108c | 82 | \f |
c5aa993b | 83 | |
c906108c SS |
84 | /* If there are two or more functions that wish to hook into exec_file_command, |
85 | * this function will call all of the hook functions. */ | |
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 | { | |
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 | ||
156 | /* Don't do anything if the current target isn't exec. */ | |
157 | if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) | |
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); |
c5aa993b | 163 | mtime = bfd_get_mtime (exec_bfd); |
c906108c SS |
164 | res = stat (filename, &st); |
165 | ||
166 | if (mtime && mtime != st.st_mtime) | |
1adeb98a FN |
167 | { |
168 | exec_open (filename, 0); | |
169 | } | |
c906108c SS |
170 | #endif |
171 | } | |
172 | \f | |
173 | /* If we have both a core file and an exec file, | |
174 | print a warning if they don't go together. */ | |
175 | ||
176 | void | |
fba45db2 | 177 | validate_files (void) |
c906108c SS |
178 | { |
179 | if (exec_bfd && core_bfd) | |
180 | { | |
181 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) | |
182 | warning ("core file may not match specified executable file."); | |
c5aa993b | 183 | else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd)) |
c906108c SS |
184 | warning ("exec file is newer than core file."); |
185 | } | |
186 | } | |
187 | ||
188 | /* Return the name of the executable file as a string. | |
189 | ERR nonzero means get error if there is none specified; | |
190 | otherwise return 0 in that case. */ | |
191 | ||
192 | char * | |
fba45db2 | 193 | get_exec_file (int err) |
c906108c | 194 | { |
c5aa993b JM |
195 | if (exec_bfd) |
196 | return bfd_get_filename (exec_bfd); | |
197 | if (!err) | |
198 | return NULL; | |
c906108c SS |
199 | |
200 | error ("No executable file specified.\n\ | |
201 | Use the \"file\" or \"exec-file\" command."); | |
202 | return NULL; | |
203 | } | |
c906108c | 204 | \f |
c5aa993b | 205 | |
c906108c SS |
206 | /* Report a memory error with error(). */ |
207 | ||
208 | void | |
fba45db2 | 209 | memory_error (int status, CORE_ADDR memaddr) |
c906108c | 210 | { |
d9fcf2fb JM |
211 | struct ui_file *tmp_stream = mem_fileopen (); |
212 | make_cleanup_ui_file_delete (tmp_stream); | |
2acceee2 | 213 | |
c906108c SS |
214 | if (status == EIO) |
215 | { | |
216 | /* Actually, address between memaddr and memaddr + len | |
c5aa993b | 217 | was out of bounds. */ |
2acceee2 JM |
218 | fprintf_unfiltered (tmp_stream, "Cannot access memory at address "); |
219 | print_address_numeric (memaddr, 1, tmp_stream); | |
c906108c SS |
220 | } |
221 | else | |
222 | { | |
2acceee2 JM |
223 | fprintf_filtered (tmp_stream, "Error accessing memory address "); |
224 | print_address_numeric (memaddr, 1, tmp_stream); | |
225 | fprintf_filtered (tmp_stream, ": %s.", | |
c5aa993b | 226 | safe_strerror (status)); |
c906108c | 227 | } |
2acceee2 JM |
228 | |
229 | error_stream (tmp_stream); | |
c906108c SS |
230 | } |
231 | ||
232 | /* Same as target_read_memory, but report an error if can't read. */ | |
233 | void | |
fba45db2 | 234 | read_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
235 | { |
236 | int status; | |
237 | status = target_read_memory (memaddr, myaddr, len); | |
238 | if (status != 0) | |
239 | memory_error (status, memaddr); | |
240 | } | |
241 | ||
ee8ff470 KB |
242 | /* Argument / return result struct for use with |
243 | do_captured_read_memory_integer(). MEMADDR and LEN are filled in | |
244 | by gdb_read_memory_integer(). RESULT is the contents that were | |
245 | successfully read from MEMADDR of length LEN. */ | |
c906108c | 246 | |
16a0f3e7 EZ |
247 | struct captured_read_memory_integer_arguments |
248 | { | |
249 | CORE_ADDR memaddr; | |
250 | int len; | |
251 | LONGEST result; | |
252 | }; | |
253 | ||
ee8ff470 KB |
254 | /* Helper function for gdb_read_memory_integer(). DATA must be a |
255 | pointer to a captured_read_memory_integer_arguments struct. | |
256 | Return 1 if successful. Note that the catch_errors() interface | |
257 | will return 0 if an error occurred while reading memory. This | |
258 | choice of return code is so that we can distinguish between | |
259 | success and failure. */ | |
260 | ||
16a0f3e7 EZ |
261 | static int |
262 | do_captured_read_memory_integer (void *data) | |
263 | { | |
264 | struct captured_read_memory_integer_arguments *args = (struct captured_read_memory_integer_arguments*) data; | |
265 | CORE_ADDR memaddr = args->memaddr; | |
266 | int len = args->len; | |
267 | ||
268 | args->result = read_memory_integer (memaddr, len); | |
269 | ||
ee8ff470 | 270 | return 1; |
16a0f3e7 EZ |
271 | } |
272 | ||
ee8ff470 KB |
273 | /* Read memory at MEMADDR of length LEN and put the contents in |
274 | RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero | |
275 | if successful. */ | |
276 | ||
16a0f3e7 EZ |
277 | int |
278 | safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value) | |
279 | { | |
280 | int status; | |
281 | struct captured_read_memory_integer_arguments args; | |
282 | args.memaddr = memaddr; | |
283 | args.len = len; | |
284 | ||
285 | status = catch_errors (do_captured_read_memory_integer, &args, | |
286 | "", RETURN_MASK_ALL); | |
ee8ff470 | 287 | if (status) |
16a0f3e7 EZ |
288 | *return_value = args.result; |
289 | ||
290 | return status; | |
291 | } | |
292 | ||
c906108c | 293 | LONGEST |
fba45db2 | 294 | read_memory_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
295 | { |
296 | char buf[sizeof (LONGEST)]; | |
297 | ||
298 | read_memory (memaddr, buf, len); | |
299 | return extract_signed_integer (buf, len); | |
300 | } | |
301 | ||
302 | ULONGEST | |
fba45db2 | 303 | read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
304 | { |
305 | char buf[sizeof (ULONGEST)]; | |
306 | ||
307 | read_memory (memaddr, buf, len); | |
308 | return extract_unsigned_integer (buf, len); | |
309 | } | |
310 | ||
311 | void | |
fba45db2 | 312 | read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
c906108c | 313 | { |
52f0bd74 AC |
314 | char *cp; |
315 | int i; | |
c906108c SS |
316 | int cnt; |
317 | ||
318 | cp = buffer; | |
319 | while (1) | |
320 | { | |
321 | if (cp - buffer >= max_len) | |
c5aa993b JM |
322 | { |
323 | buffer[max_len - 1] = '\0'; | |
324 | break; | |
325 | } | |
c906108c SS |
326 | cnt = max_len - (cp - buffer); |
327 | if (cnt > 8) | |
328 | cnt = 8; | |
329 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
330 | for (i = 0; i < cnt && *cp; i++, cp++) | |
c5aa993b | 331 | ; /* null body */ |
c906108c SS |
332 | |
333 | if (i < cnt && !*cp) | |
c5aa993b | 334 | break; |
c906108c SS |
335 | } |
336 | } | |
c26e4683 | 337 | |
0d540cdf KD |
338 | CORE_ADDR |
339 | read_memory_typed_address (CORE_ADDR addr, struct type *type) | |
340 | { | |
341 | char *buf = alloca (TYPE_LENGTH (type)); | |
342 | read_memory (addr, buf, TYPE_LENGTH (type)); | |
343 | return extract_typed_address (buf, type); | |
344 | } | |
345 | ||
c26e4683 JB |
346 | /* Same as target_write_memory, but report an error if can't write. */ |
347 | void | |
348 | write_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
349 | { | |
350 | int status; | |
351 | ||
352 | status = target_write_memory (memaddr, myaddr, len); | |
353 | if (status != 0) | |
354 | memory_error (status, memaddr); | |
355 | } | |
356 | ||
357 | /* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */ | |
358 | void | |
359 | write_memory_unsigned_integer (CORE_ADDR addr, int len, ULONGEST value) | |
360 | { | |
361 | char *buf = alloca (len); | |
362 | store_unsigned_integer (buf, len, value); | |
363 | write_memory (addr, buf, len); | |
364 | } | |
365 | ||
366 | /* Store VALUE at ADDR in the inferior as a LEN-byte signed integer. */ | |
367 | void | |
368 | write_memory_signed_integer (CORE_ADDR addr, int len, LONGEST value) | |
369 | { | |
370 | char *buf = alloca (len); | |
371 | store_signed_integer (buf, len, value); | |
372 | write_memory (addr, buf, len); | |
373 | } | |
374 | ||
c906108c | 375 | \f |
c5aa993b | 376 | |
c906108c SS |
377 | #if 0 |
378 | /* Enable after 4.12. It is not tested. */ | |
379 | ||
380 | /* Search code. Targets can just make this their search function, or | |
381 | if the protocol has a less general search function, they can call this | |
382 | in the cases it can't handle. */ | |
383 | void | |
dbb41be1 KB |
384 | generic_search (int len, char *data, char *mask, CORE_ADDR startaddr, |
385 | int increment, CORE_ADDR lorange, CORE_ADDR hirange, | |
386 | CORE_ADDR *addr_found, char *data_found) | |
c906108c SS |
387 | { |
388 | int i; | |
389 | CORE_ADDR curaddr = startaddr; | |
390 | ||
391 | while (curaddr >= lorange && curaddr < hirange) | |
392 | { | |
393 | read_memory (curaddr, data_found, len); | |
394 | for (i = 0; i < len; ++i) | |
395 | if ((data_found[i] & mask[i]) != data[i]) | |
396 | goto try_again; | |
397 | /* It matches. */ | |
398 | *addr_found = curaddr; | |
399 | return; | |
400 | ||
401 | try_again: | |
402 | curaddr += increment; | |
403 | } | |
c5aa993b | 404 | *addr_found = (CORE_ADDR) 0; |
c906108c SS |
405 | return; |
406 | } | |
407 | #endif /* 0 */ | |
408 | \f | |
409 | /* The current default bfd target. Points to storage allocated for | |
410 | gnutarget_string. */ | |
411 | char *gnutarget; | |
412 | ||
413 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
414 | static char *gnutarget_string; | |
415 | ||
a14ed312 | 416 | static void set_gnutarget_command (char *, int, struct cmd_list_element *); |
c906108c SS |
417 | |
418 | static void | |
fba45db2 | 419 | set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c | 420 | { |
bde58177 | 421 | if (strcmp (gnutarget_string, "auto") == 0) |
c906108c SS |
422 | gnutarget = NULL; |
423 | else | |
424 | gnutarget = gnutarget_string; | |
425 | } | |
426 | ||
427 | /* Set the gnutarget. */ | |
428 | void | |
fba45db2 | 429 | set_gnutarget (char *newtarget) |
c906108c SS |
430 | { |
431 | if (gnutarget_string != NULL) | |
b8c9b27d | 432 | xfree (gnutarget_string); |
c906108c SS |
433 | gnutarget_string = savestring (newtarget, strlen (newtarget)); |
434 | set_gnutarget_command (NULL, 0, NULL); | |
435 | } | |
436 | ||
437 | void | |
fba45db2 | 438 | _initialize_core (void) |
c906108c SS |
439 | { |
440 | struct cmd_list_element *c; | |
441 | c = add_cmd ("core-file", class_files, core_file_command, | |
442 | "Use FILE as core dump for examining memory and registers.\n\ | |
443 | No arg means have no core file. This command has been superseded by the\n\ | |
444 | `target core' and `detach' commands.", &cmdlist); | |
5ba2abeb | 445 | set_cmd_completer (c, filename_completer); |
c906108c SS |
446 | |
447 | c = add_set_cmd ("gnutarget", class_files, var_string_noescape, | |
c5aa993b JM |
448 | (char *) &gnutarget_string, |
449 | "Set the current BFD target.\n\ | |
c906108c | 450 | Use `set gnutarget auto' to specify automatic detection.", |
c5aa993b | 451 | &setlist); |
9f60d481 | 452 | set_cmd_sfunc (c, set_gnutarget_command); |
cb1a6d5f | 453 | deprecated_add_show_from_set (c, &showlist); |
c906108c SS |
454 | |
455 | if (getenv ("GNUTARGET")) | |
456 | set_gnutarget (getenv ("GNUTARGET")); | |
457 | else | |
458 | set_gnutarget ("auto"); | |
459 | } |