Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions above target vector, for GDB. |
b6ba6518 KB |
2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, 1998, |
3 | 1999, 2000, 2001 | |
c906108c SS |
4 | Free Software Foundation, Inc. |
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" |
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 SS |
42 | |
43 | /* You can have any number of hooks for `exec_file_command' command to call. | |
44 | If there's only one hook, it is set in exec_file_display hook. | |
45 | If there are two or more hooks, they are set in exec_file_extra_hooks[], | |
46 | and exec_file_display_hook is set to a function that calls all of them. | |
47 | This extra complexity is needed to preserve compatibility with | |
48 | old code that assumed that only one hook could be set, and which called | |
49 | exec_file_display_hook directly. */ | |
50 | ||
507f3c78 | 51 | typedef void (*hook_type) (char *); |
c906108c | 52 | |
c5aa993b | 53 | hook_type exec_file_display_hook; /* the original hook */ |
c906108c | 54 | static hook_type *exec_file_extra_hooks; /* array of additional hooks */ |
c5aa993b | 55 | static int exec_file_hook_count = 0; /* size of array */ |
c906108c SS |
56 | |
57 | /* Binary file diddling handle for the core file. */ | |
58 | ||
59 | bfd *core_bfd = NULL; | |
c906108c | 60 | \f |
c5aa993b | 61 | |
c906108c SS |
62 | /* Backward compatability with old way of specifying core files. */ |
63 | ||
64 | void | |
fba45db2 | 65 | core_file_command (char *filename, int from_tty) |
c906108c SS |
66 | { |
67 | struct target_ops *t; | |
68 | ||
c5aa993b | 69 | dont_repeat (); /* Either way, seems bogus. */ |
c906108c SS |
70 | |
71 | t = find_core_target (); | |
46c6cdcf | 72 | if (t == NULL) |
c906108c | 73 | error ("GDB can't read core files on this machine."); |
46c6cdcf C |
74 | |
75 | if (!filename) | |
76 | (t->to_detach) (filename, from_tty); | |
77 | else | |
78 | (t->to_open) (filename, from_tty); | |
c906108c | 79 | } |
c906108c | 80 | \f |
c5aa993b | 81 | |
c906108c SS |
82 | /* If there are two or more functions that wish to hook into exec_file_command, |
83 | * this function will call all of the hook functions. */ | |
84 | ||
85 | static void | |
fba45db2 | 86 | call_extra_exec_file_hooks (char *filename) |
c906108c SS |
87 | { |
88 | int i; | |
89 | ||
90 | for (i = 0; i < exec_file_hook_count; i++) | |
c5aa993b | 91 | (*exec_file_extra_hooks[i]) (filename); |
c906108c SS |
92 | } |
93 | ||
94 | /* Call this to specify the hook for exec_file_command to call back. | |
95 | This is called from the x-window display code. */ | |
96 | ||
97 | void | |
dbb41be1 | 98 | specify_exec_file_hook (void (*hook) (char *)) |
c906108c SS |
99 | { |
100 | hook_type *new_array; | |
101 | ||
102 | if (exec_file_display_hook != NULL) | |
103 | { | |
104 | /* There's already a hook installed. Arrange to have both it | |
105 | * and the subsequent hooks called. */ | |
106 | if (exec_file_hook_count == 0) | |
107 | { | |
108 | /* If this is the first extra hook, initialize the hook array. */ | |
c5aa993b | 109 | exec_file_extra_hooks = (hook_type *) xmalloc (sizeof (hook_type)); |
c906108c SS |
110 | exec_file_extra_hooks[0] = exec_file_display_hook; |
111 | exec_file_display_hook = call_extra_exec_file_hooks; | |
112 | exec_file_hook_count = 1; | |
113 | } | |
114 | ||
115 | /* Grow the hook array by one and add the new hook to the end. | |
116 | Yes, it's inefficient to grow it by one each time but since | |
117 | this is hardly ever called it's not a big deal. */ | |
118 | exec_file_hook_count++; | |
119 | new_array = | |
120 | (hook_type *) xrealloc (exec_file_extra_hooks, | |
c5aa993b | 121 | exec_file_hook_count * sizeof (hook_type)); |
c906108c SS |
122 | exec_file_extra_hooks = new_array; |
123 | exec_file_extra_hooks[exec_file_hook_count - 1] = hook; | |
124 | } | |
125 | else | |
126 | exec_file_display_hook = hook; | |
127 | } | |
128 | ||
129 | /* The exec file must be closed before running an inferior. | |
130 | If it is needed again after the inferior dies, it must | |
131 | be reopened. */ | |
132 | ||
133 | void | |
fba45db2 | 134 | close_exec_file (void) |
c906108c | 135 | { |
c5aa993b | 136 | #if 0 /* FIXME */ |
c906108c SS |
137 | if (exec_bfd) |
138 | bfd_tempclose (exec_bfd); | |
139 | #endif | |
140 | } | |
141 | ||
142 | void | |
fba45db2 | 143 | reopen_exec_file (void) |
c906108c | 144 | { |
c5aa993b | 145 | #if 0 /* FIXME */ |
c906108c SS |
146 | if (exec_bfd) |
147 | bfd_reopen (exec_bfd); | |
148 | #else | |
149 | char *filename; | |
150 | int res; | |
151 | struct stat st; | |
152 | long mtime; | |
153 | ||
154 | /* Don't do anything if the current target isn't exec. */ | |
155 | if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0) | |
156 | return; | |
c5aa993b | 157 | |
c906108c | 158 | /* If the timestamp of the exec file has changed, reopen it. */ |
c2d11a7d | 159 | filename = xstrdup (bfd_get_filename (exec_bfd)); |
b8c9b27d | 160 | make_cleanup (xfree, filename); |
c5aa993b | 161 | mtime = bfd_get_mtime (exec_bfd); |
c906108c SS |
162 | res = stat (filename, &st); |
163 | ||
164 | if (mtime && mtime != st.st_mtime) | |
1adeb98a FN |
165 | { |
166 | exec_open (filename, 0); | |
167 | } | |
c906108c SS |
168 | #endif |
169 | } | |
170 | \f | |
171 | /* If we have both a core file and an exec file, | |
172 | print a warning if they don't go together. */ | |
173 | ||
174 | void | |
fba45db2 | 175 | validate_files (void) |
c906108c SS |
176 | { |
177 | if (exec_bfd && core_bfd) | |
178 | { | |
179 | if (!core_file_matches_executable_p (core_bfd, exec_bfd)) | |
180 | warning ("core file may not match specified executable file."); | |
c5aa993b | 181 | else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd)) |
c906108c SS |
182 | warning ("exec file is newer than core file."); |
183 | } | |
184 | } | |
185 | ||
186 | /* Return the name of the executable file as a string. | |
187 | ERR nonzero means get error if there is none specified; | |
188 | otherwise return 0 in that case. */ | |
189 | ||
190 | char * | |
fba45db2 | 191 | get_exec_file (int err) |
c906108c | 192 | { |
c5aa993b JM |
193 | if (exec_bfd) |
194 | return bfd_get_filename (exec_bfd); | |
195 | if (!err) | |
196 | return NULL; | |
c906108c SS |
197 | |
198 | error ("No executable file specified.\n\ | |
199 | Use the \"file\" or \"exec-file\" command."); | |
200 | return NULL; | |
201 | } | |
c906108c | 202 | \f |
c5aa993b | 203 | |
c906108c SS |
204 | /* Report a memory error with error(). */ |
205 | ||
206 | void | |
fba45db2 | 207 | memory_error (int status, CORE_ADDR memaddr) |
c906108c | 208 | { |
d9fcf2fb JM |
209 | struct ui_file *tmp_stream = mem_fileopen (); |
210 | make_cleanup_ui_file_delete (tmp_stream); | |
2acceee2 | 211 | |
c906108c SS |
212 | if (status == EIO) |
213 | { | |
214 | /* Actually, address between memaddr and memaddr + len | |
c5aa993b | 215 | was out of bounds. */ |
2acceee2 JM |
216 | fprintf_unfiltered (tmp_stream, "Cannot access memory at address "); |
217 | print_address_numeric (memaddr, 1, tmp_stream); | |
c906108c SS |
218 | } |
219 | else | |
220 | { | |
2acceee2 JM |
221 | fprintf_filtered (tmp_stream, "Error accessing memory address "); |
222 | print_address_numeric (memaddr, 1, tmp_stream); | |
223 | fprintf_filtered (tmp_stream, ": %s.", | |
c5aa993b | 224 | safe_strerror (status)); |
c906108c | 225 | } |
2acceee2 JM |
226 | |
227 | error_stream (tmp_stream); | |
c906108c SS |
228 | } |
229 | ||
230 | /* Same as target_read_memory, but report an error if can't read. */ | |
231 | void | |
fba45db2 | 232 | read_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
233 | { |
234 | int status; | |
235 | status = target_read_memory (memaddr, myaddr, len); | |
236 | if (status != 0) | |
237 | memory_error (status, memaddr); | |
238 | } | |
239 | ||
c906108c | 240 | /* Like target_read_memory, but slightly different parameters. */ |
c906108c | 241 | int |
fba45db2 KB |
242 | dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len, |
243 | disassemble_info *info) | |
c906108c SS |
244 | { |
245 | return target_read_memory (memaddr, (char *) myaddr, len); | |
246 | } | |
247 | ||
248 | /* Like memory_error with slightly different parameters. */ | |
249 | void | |
fba45db2 | 250 | dis_asm_memory_error (int status, bfd_vma memaddr, disassemble_info *info) |
c906108c SS |
251 | { |
252 | memory_error (status, memaddr); | |
253 | } | |
254 | ||
255 | /* Like print_address with slightly different parameters. */ | |
256 | void | |
fba45db2 | 257 | dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) |
c906108c SS |
258 | { |
259 | print_address (addr, info->stream); | |
260 | } | |
261 | ||
262 | /* Same as target_write_memory, but report an error if can't write. */ | |
263 | void | |
fba45db2 | 264 | write_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
265 | { |
266 | int status; | |
267 | ||
268 | status = target_write_memory (memaddr, myaddr, len); | |
269 | if (status != 0) | |
270 | memory_error (status, memaddr); | |
271 | } | |
272 | ||
273 | /* Read an integer from debugged memory, given address and number of bytes. */ | |
274 | ||
275 | LONGEST | |
fba45db2 | 276 | read_memory_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
277 | { |
278 | char buf[sizeof (LONGEST)]; | |
279 | ||
280 | read_memory (memaddr, buf, len); | |
281 | return extract_signed_integer (buf, len); | |
282 | } | |
283 | ||
284 | ULONGEST | |
fba45db2 | 285 | read_memory_unsigned_integer (CORE_ADDR memaddr, int len) |
c906108c SS |
286 | { |
287 | char buf[sizeof (ULONGEST)]; | |
288 | ||
289 | read_memory (memaddr, buf, len); | |
290 | return extract_unsigned_integer (buf, len); | |
291 | } | |
292 | ||
293 | void | |
fba45db2 | 294 | read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len) |
c906108c | 295 | { |
c5aa993b | 296 | register char *cp; |
c906108c SS |
297 | register int i; |
298 | int cnt; | |
299 | ||
300 | cp = buffer; | |
301 | while (1) | |
302 | { | |
303 | if (cp - buffer >= max_len) | |
c5aa993b JM |
304 | { |
305 | buffer[max_len - 1] = '\0'; | |
306 | break; | |
307 | } | |
c906108c SS |
308 | cnt = max_len - (cp - buffer); |
309 | if (cnt > 8) | |
310 | cnt = 8; | |
311 | read_memory (memaddr + (int) (cp - buffer), cp, cnt); | |
312 | for (i = 0; i < cnt && *cp; i++, cp++) | |
c5aa993b | 313 | ; /* null body */ |
c906108c SS |
314 | |
315 | if (i < cnt && !*cp) | |
c5aa993b | 316 | break; |
c906108c SS |
317 | } |
318 | } | |
c906108c | 319 | \f |
c5aa993b | 320 | |
c906108c SS |
321 | #if 0 |
322 | /* Enable after 4.12. It is not tested. */ | |
323 | ||
324 | /* Search code. Targets can just make this their search function, or | |
325 | if the protocol has a less general search function, they can call this | |
326 | in the cases it can't handle. */ | |
327 | void | |
dbb41be1 KB |
328 | generic_search (int len, char *data, char *mask, CORE_ADDR startaddr, |
329 | int increment, CORE_ADDR lorange, CORE_ADDR hirange, | |
330 | CORE_ADDR *addr_found, char *data_found) | |
c906108c SS |
331 | { |
332 | int i; | |
333 | CORE_ADDR curaddr = startaddr; | |
334 | ||
335 | while (curaddr >= lorange && curaddr < hirange) | |
336 | { | |
337 | read_memory (curaddr, data_found, len); | |
338 | for (i = 0; i < len; ++i) | |
339 | if ((data_found[i] & mask[i]) != data[i]) | |
340 | goto try_again; | |
341 | /* It matches. */ | |
342 | *addr_found = curaddr; | |
343 | return; | |
344 | ||
345 | try_again: | |
346 | curaddr += increment; | |
347 | } | |
c5aa993b | 348 | *addr_found = (CORE_ADDR) 0; |
c906108c SS |
349 | return; |
350 | } | |
351 | #endif /* 0 */ | |
352 | \f | |
353 | /* The current default bfd target. Points to storage allocated for | |
354 | gnutarget_string. */ | |
355 | char *gnutarget; | |
356 | ||
357 | /* Same thing, except it is "auto" not NULL for the default case. */ | |
358 | static char *gnutarget_string; | |
359 | ||
a14ed312 | 360 | static void set_gnutarget_command (char *, int, struct cmd_list_element *); |
c906108c SS |
361 | |
362 | static void | |
fba45db2 | 363 | set_gnutarget_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c SS |
364 | { |
365 | if (STREQ (gnutarget_string, "auto")) | |
366 | gnutarget = NULL; | |
367 | else | |
368 | gnutarget = gnutarget_string; | |
369 | } | |
370 | ||
371 | /* Set the gnutarget. */ | |
372 | void | |
fba45db2 | 373 | set_gnutarget (char *newtarget) |
c906108c SS |
374 | { |
375 | if (gnutarget_string != NULL) | |
b8c9b27d | 376 | xfree (gnutarget_string); |
c906108c SS |
377 | gnutarget_string = savestring (newtarget, strlen (newtarget)); |
378 | set_gnutarget_command (NULL, 0, NULL); | |
379 | } | |
380 | ||
381 | void | |
fba45db2 | 382 | _initialize_core (void) |
c906108c SS |
383 | { |
384 | struct cmd_list_element *c; | |
385 | c = add_cmd ("core-file", class_files, core_file_command, | |
386 | "Use FILE as core dump for examining memory and registers.\n\ | |
387 | No arg means have no core file. This command has been superseded by the\n\ | |
388 | `target core' and `detach' commands.", &cmdlist); | |
389 | c->completer = filename_completer; | |
390 | ||
391 | c = add_set_cmd ("gnutarget", class_files, var_string_noescape, | |
c5aa993b JM |
392 | (char *) &gnutarget_string, |
393 | "Set the current BFD target.\n\ | |
c906108c | 394 | Use `set gnutarget auto' to specify automatic detection.", |
c5aa993b | 395 | &setlist); |
c906108c SS |
396 | c->function.sfunc = set_gnutarget_command; |
397 | add_show_from_set (c, &showlist); | |
398 | ||
399 | if (getenv ("GNUTARGET")) | |
400 | set_gnutarget (getenv ("GNUTARGET")); | |
401 | else | |
402 | set_gnutarget ("auto"); | |
403 | } |