Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
6aba47ca | 3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
4c38e0a4 | 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, 2009, 2010 |
9b254dd1 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "language.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
c5f0f3d0 | 30 | #include "completer.h" |
fd0407d6 | 31 | #include "value.h" |
4646aa9d | 32 | #include "exec.h" |
ea53e89f | 33 | #include "observer.h" |
dacec2a8 | 34 | #include "arch-utils.h" |
6c95b8df PA |
35 | #include "gdbthread.h" |
36 | #include "progspace.h" | |
c906108c | 37 | |
c906108c | 38 | #include <fcntl.h> |
dbda9972 | 39 | #include "readline/readline.h" |
c906108c SS |
40 | #include "gdb_string.h" |
41 | ||
42 | #include "gdbcore.h" | |
43 | ||
44 | #include <ctype.h> | |
45 | #include "gdb_stat.h" | |
c906108c SS |
46 | |
47 | #include "xcoffsolib.h" | |
48 | ||
a14ed312 | 49 | struct vmap *map_vmap (bfd *, bfd *); |
c906108c | 50 | |
9a4105ab | 51 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
52 | |
53 | /* Prototypes for local functions */ | |
54 | ||
a14ed312 | 55 | static void file_command (char *, int); |
c906108c | 56 | |
a14ed312 | 57 | static void set_section_command (char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void exec_files_info (struct target_ops *); |
c906108c | 60 | |
a14ed312 | 61 | static void init_exec_ops (void); |
c906108c | 62 | |
a14ed312 | 63 | void _initialize_exec (void); |
c906108c | 64 | |
c906108c SS |
65 | /* The target vector for executable files. */ |
66 | ||
67 | struct target_ops exec_ops; | |
68 | ||
6c95b8df PA |
69 | /* True if the exec target is pushed on the stack. */ |
70 | static int using_exec_ops; | |
07b82ea5 | 71 | |
c906108c SS |
72 | /* Whether to open exec and core files read-only or read-write. */ |
73 | ||
74 | int write_files = 0; | |
920d2a44 AC |
75 | static void |
76 | show_write_files (struct ui_file *file, int from_tty, | |
77 | struct cmd_list_element *c, const char *value) | |
78 | { | |
79 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
80 | value); | |
81 | } | |
82 | ||
c906108c | 83 | |
c906108c SS |
84 | struct vmap *vmap; |
85 | ||
4c42eaff | 86 | static void |
1adeb98a FN |
87 | exec_open (char *args, int from_tty) |
88 | { | |
89 | target_preopen (from_tty); | |
90 | exec_file_attach (args, from_tty); | |
91 | } | |
92 | ||
07b82ea5 PA |
93 | /* Close and clear exec_bfd. If we end up with no target sections to |
94 | read memory from, this unpushes the exec_ops target. */ | |
95 | ||
6c95b8df PA |
96 | void |
97 | exec_close (void) | |
07b82ea5 PA |
98 | { |
99 | if (exec_bfd) | |
100 | { | |
101 | bfd *abfd = exec_bfd; | |
102 | char *name = bfd_get_filename (abfd); | |
103 | ||
516ba659 | 104 | gdb_bfd_close_or_warn (abfd); |
07b82ea5 PA |
105 | xfree (name); |
106 | ||
107 | /* Removing target sections may close the exec_ops target. | |
108 | Clear exec_bfd before doing so to prevent recursion. */ | |
109 | exec_bfd = NULL; | |
110 | exec_bfd_mtime = 0; | |
111 | ||
112 | remove_target_sections (abfd); | |
113 | } | |
114 | } | |
115 | ||
6c95b8df PA |
116 | /* This is the target_close implementation. Clears all target |
117 | sections and closes all executable bfds from all program spaces. */ | |
118 | ||
c906108c | 119 | static void |
6c95b8df | 120 | exec_close_1 (int quitting) |
c906108c SS |
121 | { |
122 | int need_symtab_cleanup = 0; | |
123 | struct vmap *vp, *nxt; | |
c5aa993b | 124 | |
6c95b8df PA |
125 | using_exec_ops = 0; |
126 | ||
c5aa993b | 127 | for (nxt = vmap; nxt != NULL;) |
c906108c SS |
128 | { |
129 | vp = nxt; | |
130 | nxt = vp->nxt; | |
131 | ||
132 | /* if there is an objfile associated with this bfd, | |
c5aa993b JM |
133 | free_objfile() will do proper cleanup of objfile *and* bfd. */ |
134 | ||
c906108c SS |
135 | if (vp->objfile) |
136 | { | |
137 | free_objfile (vp->objfile); | |
138 | need_symtab_cleanup = 1; | |
139 | } | |
140 | else if (vp->bfd != exec_bfd) | |
141 | /* FIXME-leak: We should be freeing vp->name too, I think. */ | |
516ba659 | 142 | gdb_bfd_close_or_warn (vp->bfd); |
c906108c | 143 | |
b8c9b27d | 144 | xfree (vp); |
c906108c SS |
145 | } |
146 | ||
147 | vmap = NULL; | |
148 | ||
6c95b8df PA |
149 | { |
150 | struct program_space *ss; | |
151 | struct cleanup *old_chain; | |
c906108c | 152 | |
6c95b8df PA |
153 | old_chain = save_current_program_space (); |
154 | ALL_PSPACES (ss) | |
155 | { | |
156 | set_current_program_space (ss); | |
157 | ||
158 | /* Delete all target sections. */ | |
159 | resize_section_table | |
160 | (current_target_sections, | |
161 | -resize_section_table (current_target_sections, 0)); | |
162 | ||
163 | exec_close (); | |
164 | } | |
165 | ||
166 | do_cleanups (old_chain); | |
167 | } | |
c906108c SS |
168 | } |
169 | ||
1adeb98a FN |
170 | void |
171 | exec_file_clear (int from_tty) | |
172 | { | |
173 | /* Remove exec file. */ | |
6c95b8df | 174 | exec_close (); |
1adeb98a FN |
175 | |
176 | if (from_tty) | |
a3f17187 | 177 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
178 | } |
179 | ||
907083d1 | 180 | /* Set FILENAME as the new exec file. |
c906108c | 181 | |
c5aa993b JM |
182 | This function is intended to be behave essentially the same |
183 | as exec_file_command, except that the latter will detect when | |
184 | a target is being debugged, and will ask the user whether it | |
185 | should be shut down first. (If the answer is "no", then the | |
186 | new file is ignored.) | |
c906108c | 187 | |
c5aa993b JM |
188 | This file is used by exec_file_command, to do the work of opening |
189 | and processing the exec file after any prompting has happened. | |
c906108c | 190 | |
c5aa993b JM |
191 | And, it is used by child_attach, when the attach command was |
192 | given a pid but not a exec pathname, and the attach command could | |
193 | figure out the pathname from the pid. (In this case, we shouldn't | |
194 | ask the user whether the current target should be shut down -- | |
907083d1 | 195 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
196 | |
197 | void | |
1adeb98a | 198 | exec_file_attach (char *filename, int from_tty) |
c906108c | 199 | { |
c906108c | 200 | /* Remove any previous exec file. */ |
6c95b8df | 201 | exec_close (); |
c906108c SS |
202 | |
203 | /* Now open and digest the file the user requested, if any. */ | |
204 | ||
1adeb98a FN |
205 | if (!filename) |
206 | { | |
207 | if (from_tty) | |
a3f17187 | 208 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
209 | |
210 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
211 | } |
212 | else | |
c906108c | 213 | { |
f7545552 | 214 | struct cleanup *cleanups; |
c906108c SS |
215 | char *scratch_pathname; |
216 | int scratch_chan; | |
07b82ea5 | 217 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 218 | char **matching; |
c5aa993b | 219 | |
014d698b | 220 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 221 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 222 | &scratch_pathname); |
cfc3008e | 223 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 224 | if (scratch_chan < 0) |
c5aa993b JM |
225 | { |
226 | char *exename = alloca (strlen (filename) + 5); | |
d7f9d729 | 227 | |
c5aa993b | 228 | strcat (strcpy (exename, filename), ".exe"); |
014d698b | 229 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 230 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 231 | &scratch_pathname); |
c5aa993b | 232 | } |
c906108c SS |
233 | #endif |
234 | if (scratch_chan < 0) | |
235 | perror_with_name (filename); | |
9f76c2cd MM |
236 | exec_bfd = bfd_fopen (scratch_pathname, gnutarget, |
237 | write_files ? FOPEN_RUB : FOPEN_RB, | |
238 | scratch_chan); | |
c906108c SS |
239 | |
240 | if (!exec_bfd) | |
9fe4a216 TT |
241 | { |
242 | close (scratch_chan); | |
243 | error (_("\"%s\": could not open as an executable file: %s"), | |
244 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
245 | } | |
c906108c SS |
246 | |
247 | /* At this point, scratch_pathname and exec_bfd->name both point to the | |
c5aa993b JM |
248 | same malloc'd string. However exec_close() will attempt to free it |
249 | via the exec_bfd->name pointer, so we need to make another copy and | |
250 | leave exec_bfd as the new owner of the original copy. */ | |
c2d11a7d | 251 | scratch_pathname = xstrdup (scratch_pathname); |
f7545552 | 252 | cleanups = make_cleanup (xfree, scratch_pathname); |
c5aa993b | 253 | |
d18b8b7a | 254 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
255 | { |
256 | /* Make sure to close exec_bfd, or else "run" might try to use | |
257 | it. */ | |
6c95b8df | 258 | exec_close (); |
8a3fe4f8 | 259 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
260 | scratch_pathname, |
261 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
262 | } |
263 | ||
264 | /* FIXME - This should only be run for RS6000, but the ifdef is a poor | |
c5aa993b | 265 | way to accomplish. */ |
52d16ba8 | 266 | #ifdef DEPRECATED_IBM6000_TARGET |
c906108c SS |
267 | /* Setup initial vmap. */ |
268 | ||
269 | map_vmap (exec_bfd, 0); | |
270 | if (vmap == NULL) | |
271 | { | |
272 | /* Make sure to close exec_bfd, or else "run" might try to use | |
273 | it. */ | |
6c95b8df | 274 | exec_close (); |
8a3fe4f8 | 275 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
276 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
277 | } | |
52d16ba8 | 278 | #endif /* DEPRECATED_IBM6000_TARGET */ |
c906108c | 279 | |
07b82ea5 | 280 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
281 | { |
282 | /* Make sure to close exec_bfd, or else "run" might try to use | |
283 | it. */ | |
6c95b8df | 284 | exec_close (); |
8a3fe4f8 | 285 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
286 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
287 | } | |
288 | ||
c04ea773 DJ |
289 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
290 | ||
c906108c SS |
291 | validate_files (); |
292 | ||
293 | set_gdbarch_from_file (exec_bfd); | |
294 | ||
07b82ea5 | 295 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
296 | list of sections. This possibly pushes the exec_ops |
297 | target. */ | |
07b82ea5 PA |
298 | add_target_sections (sections, sections_end); |
299 | xfree (sections); | |
c906108c SS |
300 | |
301 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
302 | if (deprecated_exec_file_display_hook) |
303 | (*deprecated_exec_file_display_hook) (filename); | |
f7545552 TT |
304 | |
305 | do_cleanups (cleanups); | |
c906108c | 306 | } |
ce7d4522 | 307 | bfd_cache_close_all (); |
781b42b0 | 308 | observer_notify_executable_changed (); |
c906108c SS |
309 | } |
310 | ||
311 | /* Process the first arg in ARGS as the new exec file. | |
312 | ||
c5aa993b JM |
313 | Note that we have to explicitly ignore additional args, since we can |
314 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
315 | which can take multiple args. |
316 | ||
317 | If ARGS is NULL, we just want to close the exec file. */ | |
c906108c | 318 | |
1adeb98a | 319 | static void |
fba45db2 | 320 | exec_file_command (char *args, int from_tty) |
c906108c | 321 | { |
1adeb98a FN |
322 | char **argv; |
323 | char *filename; | |
4c42eaff DJ |
324 | |
325 | if (from_tty && target_has_execution | |
326 | && !query (_("A program is being debugged already.\n" | |
327 | "Are you sure you want to change the file? "))) | |
328 | error (_("File not changed.")); | |
1adeb98a FN |
329 | |
330 | if (args) | |
331 | { | |
f7545552 TT |
332 | struct cleanup *cleanups; |
333 | ||
1adeb98a FN |
334 | /* Scan through the args and pick up the first non option arg |
335 | as the filename. */ | |
336 | ||
d1a41061 | 337 | argv = gdb_buildargv (args); |
f7545552 | 338 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
339 | |
340 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
341 | {; | |
342 | } | |
343 | if (*argv == NULL) | |
8a3fe4f8 | 344 | error (_("No executable file name was specified")); |
1adeb98a FN |
345 | |
346 | filename = tilde_expand (*argv); | |
347 | make_cleanup (xfree, filename); | |
348 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
349 | |
350 | do_cleanups (cleanups); | |
1adeb98a FN |
351 | } |
352 | else | |
353 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
354 | } |
355 | ||
356 | /* Set both the exec file and the symbol file, in one command. | |
357 | What a novelty. Why did GDB go through four major releases before this | |
358 | command was added? */ | |
359 | ||
360 | static void | |
fba45db2 | 361 | file_command (char *arg, int from_tty) |
c906108c SS |
362 | { |
363 | /* FIXME, if we lose on reading the symbol file, we should revert | |
364 | the exec file, but that's rough. */ | |
365 | exec_file_command (arg, from_tty); | |
366 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
367 | if (deprecated_file_changed_hook) |
368 | deprecated_file_changed_hook (arg); | |
c906108c | 369 | } |
c906108c | 370 | \f |
c5aa993b | 371 | |
c906108c SS |
372 | /* Locate all mappable sections of a BFD file. |
373 | table_pp_char is a char * to get it through bfd_map_over_sections; | |
374 | we cast it back to its proper type. */ | |
375 | ||
376 | static void | |
7be0c536 AC |
377 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
378 | void *table_pp_char) | |
c906108c | 379 | { |
0542c86d | 380 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
381 | flagword aflag; |
382 | ||
0f5d55d8 JB |
383 | /* Check the section flags, but do not discard zero-length sections, since |
384 | some symbols may still be attached to this section. For instance, we | |
385 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
386 | section to which a symbol named "_end" was attached. The address | |
387 | of this symbol still needs to be relocated. */ | |
c906108c SS |
388 | aflag = bfd_get_section_flags (abfd, asect); |
389 | if (!(aflag & SEC_ALLOC)) | |
390 | return; | |
0f5d55d8 | 391 | |
c906108c SS |
392 | (*table_pp)->bfd = abfd; |
393 | (*table_pp)->the_bfd_section = asect; | |
394 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
395 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
396 | (*table_pp)++; | |
397 | } | |
398 | ||
07b82ea5 PA |
399 | int |
400 | resize_section_table (struct target_section_table *table, int num_added) | |
401 | { | |
402 | struct target_section *old_value; | |
403 | int old_count; | |
404 | int new_count; | |
405 | ||
406 | old_value = table->sections; | |
407 | old_count = table->sections_end - table->sections; | |
408 | ||
409 | new_count = num_added + old_count; | |
410 | ||
411 | if (new_count) | |
412 | { | |
413 | table->sections = xrealloc (table->sections, | |
414 | sizeof (struct target_section) * new_count); | |
415 | table->sections_end = table->sections + new_count; | |
416 | } | |
417 | else | |
418 | { | |
419 | xfree (table->sections); | |
420 | table->sections = table->sections_end = NULL; | |
421 | } | |
422 | ||
423 | return old_count; | |
424 | } | |
425 | ||
c906108c SS |
426 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
427 | Returns 0 if OK, 1 on error. */ | |
428 | ||
429 | int | |
0542c86d PA |
430 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
431 | struct target_section **end) | |
c906108c SS |
432 | { |
433 | unsigned count; | |
434 | ||
435 | count = bfd_count_sections (some_bfd); | |
436 | if (*start) | |
b8c9b27d | 437 | xfree (* start); |
0542c86d | 438 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 439 | *end = *start; |
c5aa993b | 440 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 441 | if (*end > *start + count) |
e2e0b3e5 | 442 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
443 | /* We could realloc the table, but it probably loses for most files. */ |
444 | return 0; | |
445 | } | |
07b82ea5 PA |
446 | |
447 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
448 | current set of target sections. */ | |
449 | ||
450 | void | |
451 | add_target_sections (struct target_section *sections, | |
452 | struct target_section *sections_end) | |
453 | { | |
454 | int count; | |
455 | struct target_section_table *table = current_target_sections; | |
456 | ||
457 | count = sections_end - sections; | |
458 | ||
459 | if (count > 0) | |
460 | { | |
461 | int space = resize_section_table (table, count); | |
d7f9d729 | 462 | |
07b82ea5 PA |
463 | memcpy (table->sections + space, |
464 | sections, count * sizeof (sections[0])); | |
465 | ||
466 | /* If these are the first file sections we can provide memory | |
467 | from, push the file_stratum target. */ | |
6c95b8df PA |
468 | if (!using_exec_ops) |
469 | { | |
470 | using_exec_ops = 1; | |
471 | push_target (&exec_ops); | |
472 | } | |
07b82ea5 PA |
473 | } |
474 | } | |
475 | ||
476 | /* Remove all target sections taken from ABFD. */ | |
477 | ||
478 | void | |
479 | remove_target_sections (bfd *abfd) | |
480 | { | |
481 | struct target_section *src, *dest; | |
07b82ea5 PA |
482 | struct target_section_table *table = current_target_sections; |
483 | ||
484 | dest = table->sections; | |
485 | for (src = table->sections; src < table->sections_end; src++) | |
486 | if (src->bfd != abfd) | |
487 | { | |
488 | /* Keep this section. */ | |
489 | if (dest < src) | |
490 | *dest = *src; | |
491 | dest++; | |
492 | } | |
493 | ||
494 | /* If we've dropped any sections, resize the section table. */ | |
495 | if (dest < src) | |
496 | { | |
497 | int old_count; | |
498 | ||
499 | old_count = resize_section_table (table, dest - src); | |
500 | ||
501 | /* If we don't have any more sections to read memory from, | |
502 | remove the file_stratum target from the stack. */ | |
503 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
504 | { |
505 | struct program_space *pspace; | |
506 | ||
507 | ALL_PSPACES (pspace) | |
508 | if (pspace->target_sections.sections | |
509 | != pspace->target_sections.sections_end) | |
510 | return; | |
511 | ||
512 | unpush_target (&exec_ops); | |
513 | } | |
07b82ea5 PA |
514 | } |
515 | } | |
516 | ||
c906108c SS |
517 | \f |
518 | static void | |
7be0c536 | 519 | bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3) |
c906108c SS |
520 | { |
521 | struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; | |
522 | struct vmap *vp; | |
523 | ||
524 | vp = vmap_bfd->pvmap; | |
525 | ||
526 | if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) | |
527 | return; | |
528 | ||
dc6a2ca4 | 529 | if (strcmp (bfd_section_name (abfd, sect), ".text") == 0) |
c906108c SS |
530 | { |
531 | vp->tstart = bfd_section_vma (abfd, sect); | |
532 | vp->tend = vp->tstart + bfd_section_size (abfd, sect); | |
533 | vp->tvma = bfd_section_vma (abfd, sect); | |
534 | vp->toffs = sect->filepos; | |
535 | } | |
dc6a2ca4 | 536 | else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0) |
c906108c SS |
537 | { |
538 | vp->dstart = bfd_section_vma (abfd, sect); | |
539 | vp->dend = vp->dstart + bfd_section_size (abfd, sect); | |
540 | vp->dvma = bfd_section_vma (abfd, sect); | |
541 | } | |
542 | /* Silently ignore other types of sections. (FIXME?) */ | |
543 | } | |
544 | ||
545 | /* Make a vmap for ABFD which might be a member of the archive ARCH. | |
546 | Return the new vmap. */ | |
547 | ||
548 | struct vmap * | |
fba45db2 | 549 | map_vmap (bfd *abfd, bfd *arch) |
c906108c SS |
550 | { |
551 | struct vmap_and_bfd vmap_bfd; | |
552 | struct vmap *vp, **vpp; | |
553 | ||
554 | vp = (struct vmap *) xmalloc (sizeof (*vp)); | |
555 | memset ((char *) vp, '\0', sizeof (*vp)); | |
556 | vp->nxt = 0; | |
557 | vp->bfd = abfd; | |
558 | vp->name = bfd_get_filename (arch ? arch : abfd); | |
559 | vp->member = arch ? bfd_get_filename (abfd) : ""; | |
c5aa993b | 560 | |
c906108c SS |
561 | vmap_bfd.pbfd = arch; |
562 | vmap_bfd.pvmap = vp; | |
563 | bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); | |
564 | ||
565 | /* Find the end of the list and append. */ | |
566 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) | |
567 | ; | |
568 | *vpp = vp; | |
569 | ||
570 | return vp; | |
571 | } | |
572 | \f | |
348f8c02 | 573 | |
07b82ea5 PA |
574 | int |
575 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, | |
576 | ULONGEST offset, LONGEST len, | |
577 | struct target_section *sections, | |
578 | struct target_section *sections_end, | |
579 | const char *section_name) | |
c906108c | 580 | { |
020cc13c | 581 | int res; |
0542c86d | 582 | struct target_section *p; |
07b82ea5 PA |
583 | ULONGEST memaddr = offset; |
584 | ULONGEST memend = memaddr + len; | |
c906108c SS |
585 | |
586 | if (len <= 0) | |
e2e0b3e5 | 587 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c | 588 | |
348f8c02 | 589 | for (p = sections; p < sections_end; p++) |
c906108c | 590 | { |
348f8c02 | 591 | if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0) |
c5aa993b | 592 | continue; /* not the section we need */ |
c906108c | 593 | if (memaddr >= p->addr) |
3db26b01 JB |
594 | { |
595 | if (memend <= p->endaddr) | |
596 | { | |
597 | /* Entire transfer is within this section. */ | |
07b82ea5 | 598 | if (writebuf) |
85302095 | 599 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 600 | writebuf, memaddr - p->addr, |
85302095 AC |
601 | len); |
602 | else | |
603 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 604 | readbuf, memaddr - p->addr, |
85302095 | 605 | len); |
3db26b01 JB |
606 | return (res != 0) ? len : 0; |
607 | } | |
608 | else if (memaddr >= p->endaddr) | |
609 | { | |
610 | /* This section ends before the transfer starts. */ | |
611 | continue; | |
612 | } | |
613 | else | |
614 | { | |
615 | /* This section overlaps the transfer. Just do half. */ | |
616 | len = p->endaddr - memaddr; | |
07b82ea5 | 617 | if (writebuf) |
85302095 | 618 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 619 | writebuf, memaddr - p->addr, |
85302095 AC |
620 | len); |
621 | else | |
622 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 623 | readbuf, memaddr - p->addr, |
85302095 | 624 | len); |
3db26b01 JB |
625 | return (res != 0) ? len : 0; |
626 | } | |
627 | } | |
c906108c SS |
628 | } |
629 | ||
07b82ea5 | 630 | return 0; /* We can't help */ |
c906108c | 631 | } |
348f8c02 | 632 | |
07b82ea5 PA |
633 | struct target_section_table * |
634 | exec_get_section_table (struct target_ops *ops) | |
348f8c02 | 635 | { |
07b82ea5 | 636 | return current_target_sections; |
348f8c02 PA |
637 | } |
638 | ||
07b82ea5 PA |
639 | static LONGEST |
640 | exec_xfer_partial (struct target_ops *ops, enum target_object object, | |
641 | const char *annex, gdb_byte *readbuf, | |
642 | const gdb_byte *writebuf, | |
643 | ULONGEST offset, LONGEST len) | |
348f8c02 | 644 | { |
07b82ea5 PA |
645 | struct target_section_table *table = target_get_section_table (ops); |
646 | ||
647 | if (object == TARGET_OBJECT_MEMORY) | |
648 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
649 | offset, len, | |
650 | table->sections, | |
651 | table->sections_end, | |
652 | NULL); | |
653 | else | |
654 | return -1; | |
348f8c02 | 655 | } |
c906108c | 656 | \f |
c5aa993b | 657 | |
c906108c | 658 | void |
07b82ea5 | 659 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 660 | { |
5af949e3 | 661 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 662 | struct target_section *p; |
17a912b6 | 663 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 664 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 665 | |
c5aa993b | 666 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 667 | wrap_here (" "); |
a3f17187 | 668 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 669 | if (abfd == exec_bfd) |
51bee8e9 | 670 | { |
d904de5b JK |
671 | /* gcc-3.4 does not like the initialization in <p == t->sections_end>. */ |
672 | bfd_vma displacement = 0; | |
2f1bdd26 | 673 | bfd_vma entry_point; |
51bee8e9 JK |
674 | |
675 | for (p = t->sections; p < t->sections_end; p++) | |
676 | { | |
677 | asection *asect = p->the_bfd_section; | |
678 | ||
679 | if ((bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD)) | |
680 | != (SEC_ALLOC | SEC_LOAD)) | |
681 | continue; | |
682 | ||
683 | if (bfd_get_section_vma (abfd, asect) <= abfd->start_address | |
684 | && abfd->start_address < (bfd_get_section_vma (abfd, asect) | |
685 | + bfd_get_section_size (asect))) | |
686 | { | |
687 | displacement = p->addr - bfd_get_section_vma (abfd, asect); | |
688 | break; | |
689 | } | |
690 | } | |
691 | if (p == t->sections_end) | |
d904de5b JK |
692 | warning (_("Cannot find section for the entry point of %s.\n"), |
693 | bfd_get_filename (abfd)); | |
51bee8e9 | 694 | |
2f1bdd26 MGD |
695 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
696 | bfd_get_start_address (abfd) | |
697 | + displacement); | |
51bee8e9 | 698 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 699 | paddress (gdbarch, entry_point)); |
51bee8e9 | 700 | } |
07b82ea5 | 701 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 702 | { |
bb599908 PH |
703 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
704 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
705 | |
706 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
707 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
708 | since most output will then be much wider than necessary. It | |
709 | may make sense to test the size of the file and choose the | |
710 | format string accordingly. */ | |
a3f17187 | 711 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
712 | if (info_verbose) |
713 | printf_filtered (" @ %s", | |
bb599908 | 714 | hex_string_custom (p->the_bfd_section->filepos, 8)); |
c906108c SS |
715 | printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); |
716 | if (p->bfd != abfd) | |
a3f17187 | 717 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
c906108c SS |
718 | printf_filtered ("\n"); |
719 | } | |
720 | } | |
721 | ||
722 | static void | |
fba45db2 | 723 | exec_files_info (struct target_ops *t) |
c906108c | 724 | { |
07b82ea5 | 725 | print_section_info (current_target_sections, exec_bfd); |
c906108c SS |
726 | |
727 | if (vmap) | |
728 | { | |
5af949e3 | 729 | int addr_size = gdbarch_addr_bit (target_gdbarch) / 8; |
c906108c SS |
730 | struct vmap *vp; |
731 | ||
a3f17187 | 732 | printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name); |
d4f3574e | 733 | printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n", |
5af949e3 UW |
734 | addr_size * 2, "tstart", |
735 | addr_size * 2, "tend", | |
736 | addr_size * 2, "dstart", | |
737 | addr_size * 2, "dend", | |
d4f3574e | 738 | "section", |
c5aa993b JM |
739 | "file(member)"); |
740 | ||
741 | for (vp = vmap; vp; vp = vp->nxt) | |
d4f3574e | 742 | printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n", |
5af949e3 UW |
743 | phex (vp->tstart, addr_size), |
744 | phex (vp->tend, addr_size), | |
745 | phex (vp->dstart, addr_size), | |
746 | phex (vp->dend, addr_size), | |
d4f3574e | 747 | vp->name, |
c5aa993b JM |
748 | *vp->member ? "(" : "", vp->member, |
749 | *vp->member ? ")" : ""); | |
c906108c SS |
750 | } |
751 | } | |
752 | ||
753 | static void | |
fba45db2 | 754 | set_section_command (char *args, int from_tty) |
c906108c | 755 | { |
0542c86d | 756 | struct target_section *p; |
c906108c SS |
757 | char *secname; |
758 | unsigned seclen; | |
759 | unsigned long secaddr; | |
760 | char secprint[100]; | |
761 | long offset; | |
07b82ea5 | 762 | struct target_section_table *table; |
c906108c SS |
763 | |
764 | if (args == 0) | |
8a3fe4f8 | 765 | error (_("Must specify section name and its virtual address")); |
c906108c SS |
766 | |
767 | /* Parse out section name */ | |
c5aa993b | 768 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
769 | seclen = args - secname; |
770 | ||
771 | /* Parse out new virtual address */ | |
772 | secaddr = parse_and_eval_address (args); | |
773 | ||
07b82ea5 PA |
774 | table = current_target_sections; |
775 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b JM |
776 | { |
777 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) | |
778 | && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') | |
779 | { | |
780 | offset = secaddr - p->addr; | |
781 | p->addr += offset; | |
782 | p->endaddr += offset; | |
783 | if (from_tty) | |
784 | exec_files_info (&exec_ops); | |
785 | return; | |
786 | } | |
c906108c | 787 | } |
c906108c SS |
788 | if (seclen >= sizeof (secprint)) |
789 | seclen = sizeof (secprint) - 1; | |
790 | strncpy (secprint, secname, seclen); | |
791 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 792 | error (_("Section %s not found"), secprint); |
c906108c SS |
793 | } |
794 | ||
30510692 DJ |
795 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
796 | it to ADDRESS. */ | |
c1bd25fd DJ |
797 | |
798 | void | |
799 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
800 | { | |
0542c86d | 801 | struct target_section *p; |
07b82ea5 | 802 | struct target_section_table *table; |
c1bd25fd | 803 | |
07b82ea5 PA |
804 | table = current_target_sections; |
805 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd DJ |
806 | { |
807 | if (strcmp (filename, p->bfd->filename) == 0 | |
30510692 | 808 | && index == p->the_bfd_section->index) |
c1bd25fd | 809 | { |
30510692 | 810 | p->endaddr += address - p->addr; |
c1bd25fd | 811 | p->addr = address; |
c1bd25fd DJ |
812 | } |
813 | } | |
814 | } | |
815 | ||
c906108c SS |
816 | /* If mourn is being called in all the right places, this could be say |
817 | `gdb internal error' (since generic_mourn calls | |
818 | breakpoint_init_inferior). */ | |
819 | ||
820 | static int | |
a6d9a66e | 821 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
822 | { |
823 | return 0; | |
824 | } | |
825 | ||
c35b1492 PA |
826 | static int |
827 | exec_has_memory (struct target_ops *ops) | |
828 | { | |
829 | /* We can provide memory if we have any file/target sections to read | |
830 | from. */ | |
831 | return (current_target_sections->sections | |
832 | != current_target_sections->sections_end); | |
833 | } | |
834 | ||
be4d1333 MS |
835 | /* Find mapped memory. */ |
836 | ||
837 | extern void | |
b8edc417 | 838 | exec_set_find_memory_regions (int (*func) (find_memory_region_ftype, void *)) |
be4d1333 MS |
839 | { |
840 | exec_ops.to_find_memory_regions = func; | |
841 | } | |
842 | ||
843 | static char *exec_make_note_section (bfd *, int *); | |
844 | ||
c906108c SS |
845 | /* Fill in the exec file target vector. Very few entries need to be |
846 | defined. */ | |
847 | ||
be4d1333 | 848 | static void |
fba45db2 | 849 | init_exec_ops (void) |
c906108c SS |
850 | { |
851 | exec_ops.to_shortname = "exec"; | |
852 | exec_ops.to_longname = "Local exec file"; | |
853 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
854 | Specify the filename of the executable file."; | |
1adeb98a | 855 | exec_ops.to_open = exec_open; |
6c95b8df | 856 | exec_ops.to_close = exec_close_1; |
c906108c | 857 | exec_ops.to_attach = find_default_attach; |
07b82ea5 PA |
858 | exec_ops.to_xfer_partial = exec_xfer_partial; |
859 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
860 | exec_ops.to_files_info = exec_files_info; |
861 | exec_ops.to_insert_breakpoint = ignore; | |
862 | exec_ops.to_remove_breakpoint = ignore; | |
863 | exec_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 864 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 865 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 866 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
c5aa993b | 867 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
868 | } |
869 | ||
870 | void | |
fba45db2 | 871 | _initialize_exec (void) |
c906108c SS |
872 | { |
873 | struct cmd_list_element *c; | |
874 | ||
875 | init_exec_ops (); | |
876 | ||
877 | if (!dbx_commands) | |
878 | { | |
1a966eab AC |
879 | c = add_cmd ("file", class_files, file_command, _("\ |
880 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
881 | It is read for its symbols, for getting the contents of pure memory,\n\ |
882 | and it is the program executed when you use the `run' command.\n\ | |
883 | If FILE cannot be found as specified, your execution directory path\n\ | |
884 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 885 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 886 | set_cmd_completer (c, filename_completer); |
c906108c SS |
887 | } |
888 | ||
1a966eab AC |
889 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
890 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
891 | If FILE cannot be found as specified, your execution directory path\n\ |
892 | is searched for a command of that name.\n\ | |
1a966eab | 893 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 894 | set_cmd_completer (c, filename_completer); |
c906108c | 895 | |
1bedd215 AC |
896 | add_com ("section", class_files, set_section_command, _("\ |
897 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
898 | This can be used if the exec file does not contain section addresses,\n\ |
899 | (such as in the a.out format), or when the addresses specified in the\n\ | |
900 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 901 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 902 | |
5bf193a2 AC |
903 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
904 | Set writing into executable and core files."), _("\ | |
905 | Show writing into executable and core files."), NULL, | |
906 | NULL, | |
920d2a44 | 907 | show_write_files, |
5bf193a2 | 908 | &setlist, &showlist); |
c5aa993b | 909 | |
c906108c SS |
910 | add_target (&exec_ops); |
911 | } | |
be4d1333 MS |
912 | |
913 | static char * | |
914 | exec_make_note_section (bfd *obfd, int *note_size) | |
915 | { | |
8a3fe4f8 | 916 | error (_("Can't create a corefile")); |
be4d1333 | 917 | } |