Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
6aba47ca | 3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
0fb0cc75 | 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, 2009 |
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" |
c906108c | 35 | |
c906108c | 36 | #include <fcntl.h> |
dbda9972 | 37 | #include "readline/readline.h" |
c906108c SS |
38 | #include "gdb_string.h" |
39 | ||
40 | #include "gdbcore.h" | |
41 | ||
42 | #include <ctype.h> | |
43 | #include "gdb_stat.h" | |
c906108c SS |
44 | |
45 | #include "xcoffsolib.h" | |
46 | ||
a14ed312 | 47 | struct vmap *map_vmap (bfd *, bfd *); |
c906108c | 48 | |
9a4105ab | 49 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
50 | |
51 | /* Prototypes for local functions */ | |
52 | ||
a14ed312 | 53 | static void exec_close (int); |
c906108c | 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 | ||
69 | /* The Binary File Descriptor handle for the executable file. */ | |
70 | ||
71 | bfd *exec_bfd = NULL; | |
c04ea773 | 72 | long exec_bfd_mtime = 0; |
c906108c | 73 | |
07b82ea5 PA |
74 | /* GDB currently only supports a single symbol/address space for the |
75 | whole debug session. When that limitation is lifted, this global | |
76 | goes away. */ | |
77 | static struct target_section_table current_target_sections_1; | |
78 | ||
79 | /* The set of target sections matching the sections mapped into the | |
80 | current inferior's address space. */ | |
81 | static struct target_section_table *current_target_sections | |
82 | = ¤t_target_sections_1; | |
83 | ||
c906108c SS |
84 | /* Whether to open exec and core files read-only or read-write. */ |
85 | ||
86 | int write_files = 0; | |
920d2a44 AC |
87 | static void |
88 | show_write_files (struct ui_file *file, int from_tty, | |
89 | struct cmd_list_element *c, const char *value) | |
90 | { | |
91 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
92 | value); | |
93 | } | |
94 | ||
c906108c | 95 | |
c906108c SS |
96 | struct vmap *vmap; |
97 | ||
4c42eaff | 98 | static void |
1adeb98a FN |
99 | exec_open (char *args, int from_tty) |
100 | { | |
101 | target_preopen (from_tty); | |
102 | exec_file_attach (args, from_tty); | |
103 | } | |
104 | ||
07b82ea5 PA |
105 | /* Close and clear exec_bfd. If we end up with no target sections to |
106 | read memory from, this unpushes the exec_ops target. */ | |
107 | ||
108 | static void | |
109 | exec_close_1 (void) | |
110 | { | |
111 | if (exec_bfd) | |
112 | { | |
113 | bfd *abfd = exec_bfd; | |
114 | char *name = bfd_get_filename (abfd); | |
115 | ||
116 | if (!bfd_close (abfd)) | |
117 | warning (_("cannot close \"%s\": %s"), | |
118 | name, bfd_errmsg (bfd_get_error ())); | |
119 | xfree (name); | |
120 | ||
121 | /* Removing target sections may close the exec_ops target. | |
122 | Clear exec_bfd before doing so to prevent recursion. */ | |
123 | exec_bfd = NULL; | |
124 | exec_bfd_mtime = 0; | |
125 | ||
126 | remove_target_sections (abfd); | |
127 | } | |
128 | } | |
129 | ||
c906108c | 130 | static void |
fba45db2 | 131 | exec_close (int quitting) |
c906108c SS |
132 | { |
133 | int need_symtab_cleanup = 0; | |
134 | struct vmap *vp, *nxt; | |
c5aa993b JM |
135 | |
136 | for (nxt = vmap; nxt != NULL;) | |
c906108c SS |
137 | { |
138 | vp = nxt; | |
139 | nxt = vp->nxt; | |
140 | ||
141 | /* if there is an objfile associated with this bfd, | |
c5aa993b JM |
142 | free_objfile() will do proper cleanup of objfile *and* bfd. */ |
143 | ||
c906108c SS |
144 | if (vp->objfile) |
145 | { | |
146 | free_objfile (vp->objfile); | |
147 | need_symtab_cleanup = 1; | |
148 | } | |
149 | else if (vp->bfd != exec_bfd) | |
150 | /* FIXME-leak: We should be freeing vp->name too, I think. */ | |
151 | if (!bfd_close (vp->bfd)) | |
8a3fe4f8 | 152 | warning (_("cannot close \"%s\": %s"), |
c906108c SS |
153 | vp->name, bfd_errmsg (bfd_get_error ())); |
154 | ||
155 | /* FIXME: This routine is #if 0'd in symfile.c. What should we | |
c5aa993b JM |
156 | be doing here? Should we just free everything in |
157 | vp->objfile->symtabs? Should free_objfile do that? | |
158 | FIXME-as-well: free_objfile already free'd vp->name, so it isn't | |
159 | valid here. */ | |
c906108c | 160 | free_named_symtabs (vp->name); |
b8c9b27d | 161 | xfree (vp); |
c906108c SS |
162 | } |
163 | ||
164 | vmap = NULL; | |
165 | ||
07b82ea5 PA |
166 | /* Delete all target sections. */ |
167 | resize_section_table | |
168 | (current_target_sections, | |
169 | -resize_section_table (current_target_sections, 0)); | |
c906108c | 170 | |
07b82ea5 PA |
171 | /* Remove exec file. */ |
172 | exec_close_1 (); | |
c906108c SS |
173 | } |
174 | ||
1adeb98a FN |
175 | void |
176 | exec_file_clear (int from_tty) | |
177 | { | |
178 | /* Remove exec file. */ | |
07b82ea5 | 179 | exec_close_1 (); |
1adeb98a FN |
180 | |
181 | if (from_tty) | |
a3f17187 | 182 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
183 | } |
184 | ||
907083d1 | 185 | /* Set FILENAME as the new exec file. |
c906108c | 186 | |
c5aa993b JM |
187 | This function is intended to be behave essentially the same |
188 | as exec_file_command, except that the latter will detect when | |
189 | a target is being debugged, and will ask the user whether it | |
190 | should be shut down first. (If the answer is "no", then the | |
191 | new file is ignored.) | |
c906108c | 192 | |
c5aa993b JM |
193 | This file is used by exec_file_command, to do the work of opening |
194 | and processing the exec file after any prompting has happened. | |
c906108c | 195 | |
c5aa993b JM |
196 | And, it is used by child_attach, when the attach command was |
197 | given a pid but not a exec pathname, and the attach command could | |
198 | figure out the pathname from the pid. (In this case, we shouldn't | |
199 | ask the user whether the current target should be shut down -- | |
907083d1 | 200 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
201 | |
202 | void | |
1adeb98a | 203 | exec_file_attach (char *filename, int from_tty) |
c906108c | 204 | { |
c906108c | 205 | /* Remove any previous exec file. */ |
07b82ea5 | 206 | exec_close_1 (); |
c906108c SS |
207 | |
208 | /* Now open and digest the file the user requested, if any. */ | |
209 | ||
1adeb98a FN |
210 | if (!filename) |
211 | { | |
212 | if (from_tty) | |
a3f17187 | 213 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
214 | |
215 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
216 | } |
217 | else | |
c906108c | 218 | { |
f7545552 | 219 | struct cleanup *cleanups; |
c906108c SS |
220 | char *scratch_pathname; |
221 | int scratch_chan; | |
07b82ea5 | 222 | struct target_section *sections = NULL, *sections_end = NULL; |
c5aa993b | 223 | |
014d698b | 224 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 225 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 226 | &scratch_pathname); |
cfc3008e | 227 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 228 | if (scratch_chan < 0) |
c5aa993b JM |
229 | { |
230 | char *exename = alloca (strlen (filename) + 5); | |
231 | strcat (strcpy (exename, filename), ".exe"); | |
014d698b | 232 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 233 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 234 | &scratch_pathname); |
c5aa993b | 235 | } |
c906108c SS |
236 | #endif |
237 | if (scratch_chan < 0) | |
238 | perror_with_name (filename); | |
9f76c2cd MM |
239 | exec_bfd = bfd_fopen (scratch_pathname, gnutarget, |
240 | write_files ? FOPEN_RUB : FOPEN_RB, | |
241 | scratch_chan); | |
c906108c SS |
242 | |
243 | if (!exec_bfd) | |
9fe4a216 TT |
244 | { |
245 | close (scratch_chan); | |
246 | error (_("\"%s\": could not open as an executable file: %s"), | |
247 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
248 | } | |
c906108c SS |
249 | |
250 | /* At this point, scratch_pathname and exec_bfd->name both point to the | |
c5aa993b JM |
251 | same malloc'd string. However exec_close() will attempt to free it |
252 | via the exec_bfd->name pointer, so we need to make another copy and | |
253 | leave exec_bfd as the new owner of the original copy. */ | |
c2d11a7d | 254 | scratch_pathname = xstrdup (scratch_pathname); |
f7545552 | 255 | cleanups = make_cleanup (xfree, scratch_pathname); |
c5aa993b | 256 | |
c906108c SS |
257 | if (!bfd_check_format (exec_bfd, bfd_object)) |
258 | { | |
259 | /* Make sure to close exec_bfd, or else "run" might try to use | |
260 | it. */ | |
07b82ea5 | 261 | exec_close_1 (); |
8a3fe4f8 | 262 | error (_("\"%s\": not in executable format: %s"), |
c906108c SS |
263 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
264 | } | |
265 | ||
266 | /* FIXME - This should only be run for RS6000, but the ifdef is a poor | |
c5aa993b | 267 | way to accomplish. */ |
52d16ba8 | 268 | #ifdef DEPRECATED_IBM6000_TARGET |
c906108c SS |
269 | /* Setup initial vmap. */ |
270 | ||
271 | map_vmap (exec_bfd, 0); | |
272 | if (vmap == NULL) | |
273 | { | |
274 | /* Make sure to close exec_bfd, or else "run" might try to use | |
275 | it. */ | |
07b82ea5 | 276 | exec_close_1 (); |
8a3fe4f8 | 277 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
278 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
279 | } | |
52d16ba8 | 280 | #endif /* DEPRECATED_IBM6000_TARGET */ |
c906108c | 281 | |
07b82ea5 | 282 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
283 | { |
284 | /* Make sure to close exec_bfd, or else "run" might try to use | |
285 | it. */ | |
07b82ea5 | 286 | exec_close_1 (); |
8a3fe4f8 | 287 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
288 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
289 | } | |
290 | ||
c04ea773 DJ |
291 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
292 | ||
c906108c SS |
293 | validate_files (); |
294 | ||
295 | set_gdbarch_from_file (exec_bfd); | |
296 | ||
07b82ea5 PA |
297 | /* Add the executable's sections to the current address spaces' |
298 | list of sections. */ | |
299 | add_target_sections (sections, sections_end); | |
300 | xfree (sections); | |
c906108c SS |
301 | |
302 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
303 | if (deprecated_exec_file_display_hook) |
304 | (*deprecated_exec_file_display_hook) (filename); | |
f7545552 TT |
305 | |
306 | do_cleanups (cleanups); | |
c906108c | 307 | } |
ce7d4522 | 308 | bfd_cache_close_all (); |
781b42b0 | 309 | observer_notify_executable_changed (); |
c906108c SS |
310 | } |
311 | ||
312 | /* Process the first arg in ARGS as the new exec file. | |
313 | ||
c5aa993b JM |
314 | Note that we have to explicitly ignore additional args, since we can |
315 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
316 | which can take multiple args. |
317 | ||
318 | If ARGS is NULL, we just want to close the exec file. */ | |
c906108c | 319 | |
1adeb98a | 320 | static void |
fba45db2 | 321 | exec_file_command (char *args, int from_tty) |
c906108c | 322 | { |
1adeb98a FN |
323 | char **argv; |
324 | char *filename; | |
4c42eaff DJ |
325 | |
326 | if (from_tty && target_has_execution | |
327 | && !query (_("A program is being debugged already.\n" | |
328 | "Are you sure you want to change the file? "))) | |
329 | error (_("File not changed.")); | |
1adeb98a FN |
330 | |
331 | if (args) | |
332 | { | |
f7545552 TT |
333 | struct cleanup *cleanups; |
334 | ||
1adeb98a FN |
335 | /* Scan through the args and pick up the first non option arg |
336 | as the filename. */ | |
337 | ||
d1a41061 | 338 | argv = gdb_buildargv (args); |
f7545552 | 339 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
340 | |
341 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
342 | {; | |
343 | } | |
344 | if (*argv == NULL) | |
8a3fe4f8 | 345 | error (_("No executable file name was specified")); |
1adeb98a FN |
346 | |
347 | filename = tilde_expand (*argv); | |
348 | make_cleanup (xfree, filename); | |
349 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
350 | |
351 | do_cleanups (cleanups); | |
1adeb98a FN |
352 | } |
353 | else | |
354 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
355 | } |
356 | ||
357 | /* Set both the exec file and the symbol file, in one command. | |
358 | What a novelty. Why did GDB go through four major releases before this | |
359 | command was added? */ | |
360 | ||
361 | static void | |
fba45db2 | 362 | file_command (char *arg, int from_tty) |
c906108c SS |
363 | { |
364 | /* FIXME, if we lose on reading the symbol file, we should revert | |
365 | the exec file, but that's rough. */ | |
366 | exec_file_command (arg, from_tty); | |
367 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
368 | if (deprecated_file_changed_hook) |
369 | deprecated_file_changed_hook (arg); | |
c906108c | 370 | } |
c906108c | 371 | \f |
c5aa993b | 372 | |
c906108c SS |
373 | /* Locate all mappable sections of a BFD file. |
374 | table_pp_char is a char * to get it through bfd_map_over_sections; | |
375 | we cast it back to its proper type. */ | |
376 | ||
377 | static void | |
7be0c536 AC |
378 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
379 | void *table_pp_char) | |
c906108c | 380 | { |
0542c86d | 381 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
382 | flagword aflag; |
383 | ||
0f5d55d8 JB |
384 | /* Check the section flags, but do not discard zero-length sections, since |
385 | some symbols may still be attached to this section. For instance, we | |
386 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
387 | section to which a symbol named "_end" was attached. The address | |
388 | of this symbol still needs to be relocated. */ | |
c906108c SS |
389 | aflag = bfd_get_section_flags (abfd, asect); |
390 | if (!(aflag & SEC_ALLOC)) | |
391 | return; | |
0f5d55d8 | 392 | |
c906108c SS |
393 | (*table_pp)->bfd = abfd; |
394 | (*table_pp)->the_bfd_section = asect; | |
395 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
396 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
397 | (*table_pp)++; | |
398 | } | |
399 | ||
07b82ea5 PA |
400 | int |
401 | resize_section_table (struct target_section_table *table, int num_added) | |
402 | { | |
403 | struct target_section *old_value; | |
404 | int old_count; | |
405 | int new_count; | |
406 | ||
407 | old_value = table->sections; | |
408 | old_count = table->sections_end - table->sections; | |
409 | ||
410 | new_count = num_added + old_count; | |
411 | ||
412 | if (new_count) | |
413 | { | |
414 | table->sections = xrealloc (table->sections, | |
415 | sizeof (struct target_section) * new_count); | |
416 | table->sections_end = table->sections + new_count; | |
417 | } | |
418 | else | |
419 | { | |
420 | xfree (table->sections); | |
421 | table->sections = table->sections_end = NULL; | |
422 | } | |
423 | ||
424 | return old_count; | |
425 | } | |
426 | ||
c906108c SS |
427 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
428 | Returns 0 if OK, 1 on error. */ | |
429 | ||
430 | int | |
0542c86d PA |
431 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
432 | struct target_section **end) | |
c906108c SS |
433 | { |
434 | unsigned count; | |
435 | ||
436 | count = bfd_count_sections (some_bfd); | |
437 | if (*start) | |
b8c9b27d | 438 | xfree (* start); |
0542c86d | 439 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 440 | *end = *start; |
c5aa993b | 441 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 442 | if (*end > *start + count) |
e2e0b3e5 | 443 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
444 | /* We could realloc the table, but it probably loses for most files. */ |
445 | return 0; | |
446 | } | |
07b82ea5 PA |
447 | |
448 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
449 | current set of target sections. */ | |
450 | ||
451 | void | |
452 | add_target_sections (struct target_section *sections, | |
453 | struct target_section *sections_end) | |
454 | { | |
455 | int count; | |
456 | struct target_section_table *table = current_target_sections; | |
457 | ||
458 | count = sections_end - sections; | |
459 | ||
460 | if (count > 0) | |
461 | { | |
462 | int space = resize_section_table (table, count); | |
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. */ | |
468 | if (space == 0) | |
469 | push_target (&exec_ops); | |
470 | } | |
471 | } | |
472 | ||
473 | /* Remove all target sections taken from ABFD. */ | |
474 | ||
475 | void | |
476 | remove_target_sections (bfd *abfd) | |
477 | { | |
478 | struct target_section *src, *dest; | |
479 | ||
480 | struct target_section_table *table = current_target_sections; | |
481 | ||
482 | dest = table->sections; | |
483 | for (src = table->sections; src < table->sections_end; src++) | |
484 | if (src->bfd != abfd) | |
485 | { | |
486 | /* Keep this section. */ | |
487 | if (dest < src) | |
488 | *dest = *src; | |
489 | dest++; | |
490 | } | |
491 | ||
492 | /* If we've dropped any sections, resize the section table. */ | |
493 | if (dest < src) | |
494 | { | |
495 | int old_count; | |
496 | ||
497 | old_count = resize_section_table (table, dest - src); | |
498 | ||
499 | /* If we don't have any more sections to read memory from, | |
500 | remove the file_stratum target from the stack. */ | |
501 | if (old_count + (dest - src) == 0) | |
502 | unpush_target (&exec_ops); | |
503 | } | |
504 | } | |
505 | ||
c906108c SS |
506 | \f |
507 | static void | |
7be0c536 | 508 | bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3) |
c906108c SS |
509 | { |
510 | struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; | |
511 | struct vmap *vp; | |
512 | ||
513 | vp = vmap_bfd->pvmap; | |
514 | ||
515 | if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) | |
516 | return; | |
517 | ||
dc6a2ca4 | 518 | if (strcmp (bfd_section_name (abfd, sect), ".text") == 0) |
c906108c SS |
519 | { |
520 | vp->tstart = bfd_section_vma (abfd, sect); | |
521 | vp->tend = vp->tstart + bfd_section_size (abfd, sect); | |
522 | vp->tvma = bfd_section_vma (abfd, sect); | |
523 | vp->toffs = sect->filepos; | |
524 | } | |
dc6a2ca4 | 525 | else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0) |
c906108c SS |
526 | { |
527 | vp->dstart = bfd_section_vma (abfd, sect); | |
528 | vp->dend = vp->dstart + bfd_section_size (abfd, sect); | |
529 | vp->dvma = bfd_section_vma (abfd, sect); | |
530 | } | |
531 | /* Silently ignore other types of sections. (FIXME?) */ | |
532 | } | |
533 | ||
534 | /* Make a vmap for ABFD which might be a member of the archive ARCH. | |
535 | Return the new vmap. */ | |
536 | ||
537 | struct vmap * | |
fba45db2 | 538 | map_vmap (bfd *abfd, bfd *arch) |
c906108c SS |
539 | { |
540 | struct vmap_and_bfd vmap_bfd; | |
541 | struct vmap *vp, **vpp; | |
542 | ||
543 | vp = (struct vmap *) xmalloc (sizeof (*vp)); | |
544 | memset ((char *) vp, '\0', sizeof (*vp)); | |
545 | vp->nxt = 0; | |
546 | vp->bfd = abfd; | |
547 | vp->name = bfd_get_filename (arch ? arch : abfd); | |
548 | vp->member = arch ? bfd_get_filename (abfd) : ""; | |
c5aa993b | 549 | |
c906108c SS |
550 | vmap_bfd.pbfd = arch; |
551 | vmap_bfd.pvmap = vp; | |
552 | bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); | |
553 | ||
554 | /* Find the end of the list and append. */ | |
555 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) | |
556 | ; | |
557 | *vpp = vp; | |
558 | ||
559 | return vp; | |
560 | } | |
561 | \f | |
348f8c02 | 562 | |
07b82ea5 PA |
563 | int |
564 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, | |
565 | ULONGEST offset, LONGEST len, | |
566 | struct target_section *sections, | |
567 | struct target_section *sections_end, | |
568 | const char *section_name) | |
c906108c | 569 | { |
020cc13c | 570 | int res; |
0542c86d | 571 | struct target_section *p; |
07b82ea5 PA |
572 | ULONGEST memaddr = offset; |
573 | ULONGEST memend = memaddr + len; | |
c906108c SS |
574 | |
575 | if (len <= 0) | |
e2e0b3e5 | 576 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c | 577 | |
348f8c02 | 578 | for (p = sections; p < sections_end; p++) |
c906108c | 579 | { |
348f8c02 | 580 | if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0) |
c5aa993b | 581 | continue; /* not the section we need */ |
c906108c | 582 | if (memaddr >= p->addr) |
3db26b01 JB |
583 | { |
584 | if (memend <= p->endaddr) | |
585 | { | |
586 | /* Entire transfer is within this section. */ | |
07b82ea5 | 587 | if (writebuf) |
85302095 | 588 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 589 | writebuf, memaddr - p->addr, |
85302095 AC |
590 | len); |
591 | else | |
592 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 593 | readbuf, memaddr - p->addr, |
85302095 | 594 | len); |
3db26b01 JB |
595 | return (res != 0) ? len : 0; |
596 | } | |
597 | else if (memaddr >= p->endaddr) | |
598 | { | |
599 | /* This section ends before the transfer starts. */ | |
600 | continue; | |
601 | } | |
602 | else | |
603 | { | |
604 | /* This section overlaps the transfer. Just do half. */ | |
605 | len = p->endaddr - memaddr; | |
07b82ea5 | 606 | if (writebuf) |
85302095 | 607 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 608 | writebuf, memaddr - p->addr, |
85302095 AC |
609 | len); |
610 | else | |
611 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 612 | readbuf, memaddr - p->addr, |
85302095 | 613 | len); |
3db26b01 JB |
614 | return (res != 0) ? len : 0; |
615 | } | |
616 | } | |
c906108c SS |
617 | } |
618 | ||
07b82ea5 | 619 | return 0; /* We can't help */ |
c906108c | 620 | } |
348f8c02 | 621 | |
07b82ea5 PA |
622 | struct target_section_table * |
623 | exec_get_section_table (struct target_ops *ops) | |
348f8c02 | 624 | { |
07b82ea5 | 625 | return current_target_sections; |
348f8c02 PA |
626 | } |
627 | ||
07b82ea5 PA |
628 | static LONGEST |
629 | exec_xfer_partial (struct target_ops *ops, enum target_object object, | |
630 | const char *annex, gdb_byte *readbuf, | |
631 | const gdb_byte *writebuf, | |
632 | ULONGEST offset, LONGEST len) | |
348f8c02 | 633 | { |
07b82ea5 PA |
634 | struct target_section_table *table = target_get_section_table (ops); |
635 | ||
636 | if (object == TARGET_OBJECT_MEMORY) | |
637 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
638 | offset, len, | |
639 | table->sections, | |
640 | table->sections_end, | |
641 | NULL); | |
642 | else | |
643 | return -1; | |
348f8c02 | 644 | } |
c906108c | 645 | \f |
c5aa993b | 646 | |
c906108c | 647 | void |
07b82ea5 | 648 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 649 | { |
0542c86d | 650 | struct target_section *p; |
17a912b6 | 651 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
ed49a04f | 652 | int wid = gdbarch_addr_bit (gdbarch_from_bfd (abfd)) <= 32 ? 8 : 16; |
c906108c | 653 | |
c5aa993b | 654 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 655 | wrap_here (" "); |
a3f17187 | 656 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 657 | if (abfd == exec_bfd) |
944f08ab JB |
658 | printf_filtered (_("\tEntry point: %s\n"), |
659 | paddress (bfd_get_start_address (abfd))); | |
07b82ea5 | 660 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 661 | { |
bb599908 PH |
662 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
663 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
664 | |
665 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
666 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
667 | since most output will then be much wider than necessary. It | |
668 | may make sense to test the size of the file and choose the | |
669 | format string accordingly. */ | |
a3f17187 | 670 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
671 | if (info_verbose) |
672 | printf_filtered (" @ %s", | |
bb599908 | 673 | hex_string_custom (p->the_bfd_section->filepos, 8)); |
c906108c SS |
674 | printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); |
675 | if (p->bfd != abfd) | |
a3f17187 | 676 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
c906108c SS |
677 | printf_filtered ("\n"); |
678 | } | |
679 | } | |
680 | ||
681 | static void | |
fba45db2 | 682 | exec_files_info (struct target_ops *t) |
c906108c | 683 | { |
07b82ea5 | 684 | print_section_info (current_target_sections, exec_bfd); |
c906108c SS |
685 | |
686 | if (vmap) | |
687 | { | |
688 | struct vmap *vp; | |
689 | ||
a3f17187 | 690 | printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name); |
d4f3574e SS |
691 | printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n", |
692 | strlen_paddr (), "tstart", | |
693 | strlen_paddr (), "tend", | |
694 | strlen_paddr (), "dstart", | |
695 | strlen_paddr (), "dend", | |
696 | "section", | |
c5aa993b JM |
697 | "file(member)"); |
698 | ||
699 | for (vp = vmap; vp; vp = vp->nxt) | |
d4f3574e SS |
700 | printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n", |
701 | paddr (vp->tstart), | |
702 | paddr (vp->tend), | |
703 | paddr (vp->dstart), | |
704 | paddr (vp->dend), | |
705 | vp->name, | |
c5aa993b JM |
706 | *vp->member ? "(" : "", vp->member, |
707 | *vp->member ? ")" : ""); | |
c906108c SS |
708 | } |
709 | } | |
710 | ||
711 | static void | |
fba45db2 | 712 | set_section_command (char *args, int from_tty) |
c906108c | 713 | { |
0542c86d | 714 | struct target_section *p; |
c906108c SS |
715 | char *secname; |
716 | unsigned seclen; | |
717 | unsigned long secaddr; | |
718 | char secprint[100]; | |
719 | long offset; | |
07b82ea5 | 720 | struct target_section_table *table; |
c906108c SS |
721 | |
722 | if (args == 0) | |
8a3fe4f8 | 723 | error (_("Must specify section name and its virtual address")); |
c906108c SS |
724 | |
725 | /* Parse out section name */ | |
c5aa993b | 726 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
727 | seclen = args - secname; |
728 | ||
729 | /* Parse out new virtual address */ | |
730 | secaddr = parse_and_eval_address (args); | |
731 | ||
07b82ea5 PA |
732 | table = current_target_sections; |
733 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b JM |
734 | { |
735 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) | |
736 | && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') | |
737 | { | |
738 | offset = secaddr - p->addr; | |
739 | p->addr += offset; | |
740 | p->endaddr += offset; | |
741 | if (from_tty) | |
742 | exec_files_info (&exec_ops); | |
743 | return; | |
744 | } | |
c906108c | 745 | } |
c906108c SS |
746 | if (seclen >= sizeof (secprint)) |
747 | seclen = sizeof (secprint) - 1; | |
748 | strncpy (secprint, secname, seclen); | |
749 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 750 | error (_("Section %s not found"), secprint); |
c906108c SS |
751 | } |
752 | ||
30510692 DJ |
753 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
754 | it to ADDRESS. */ | |
c1bd25fd DJ |
755 | |
756 | void | |
757 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
758 | { | |
0542c86d | 759 | struct target_section *p; |
07b82ea5 | 760 | struct target_section_table *table; |
c1bd25fd | 761 | |
07b82ea5 PA |
762 | table = current_target_sections; |
763 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd DJ |
764 | { |
765 | if (strcmp (filename, p->bfd->filename) == 0 | |
30510692 | 766 | && index == p->the_bfd_section->index) |
c1bd25fd | 767 | { |
30510692 | 768 | p->endaddr += address - p->addr; |
c1bd25fd | 769 | p->addr = address; |
c1bd25fd DJ |
770 | } |
771 | } | |
772 | } | |
773 | ||
c906108c SS |
774 | /* If mourn is being called in all the right places, this could be say |
775 | `gdb internal error' (since generic_mourn calls | |
776 | breakpoint_init_inferior). */ | |
777 | ||
778 | static int | |
8181d85f | 779 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
780 | { |
781 | return 0; | |
782 | } | |
783 | ||
c35b1492 PA |
784 | static int |
785 | exec_has_memory (struct target_ops *ops) | |
786 | { | |
787 | /* We can provide memory if we have any file/target sections to read | |
788 | from. */ | |
789 | return (current_target_sections->sections | |
790 | != current_target_sections->sections_end); | |
791 | } | |
792 | ||
be4d1333 MS |
793 | /* Find mapped memory. */ |
794 | ||
795 | extern void | |
796 | exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, | |
797 | unsigned long, | |
798 | int, int, int, | |
799 | void *), | |
800 | void *)) | |
801 | { | |
802 | exec_ops.to_find_memory_regions = func; | |
803 | } | |
804 | ||
805 | static char *exec_make_note_section (bfd *, int *); | |
806 | ||
c906108c SS |
807 | /* Fill in the exec file target vector. Very few entries need to be |
808 | defined. */ | |
809 | ||
be4d1333 | 810 | static void |
fba45db2 | 811 | init_exec_ops (void) |
c906108c SS |
812 | { |
813 | exec_ops.to_shortname = "exec"; | |
814 | exec_ops.to_longname = "Local exec file"; | |
815 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
816 | Specify the filename of the executable file."; | |
1adeb98a | 817 | exec_ops.to_open = exec_open; |
c906108c SS |
818 | exec_ops.to_close = exec_close; |
819 | exec_ops.to_attach = find_default_attach; | |
07b82ea5 PA |
820 | exec_ops.to_xfer_partial = exec_xfer_partial; |
821 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
822 | exec_ops.to_files_info = exec_files_info; |
823 | exec_ops.to_insert_breakpoint = ignore; | |
824 | exec_ops.to_remove_breakpoint = ignore; | |
825 | exec_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 826 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 827 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 828 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
c5aa993b | 829 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
830 | } |
831 | ||
832 | void | |
fba45db2 | 833 | _initialize_exec (void) |
c906108c SS |
834 | { |
835 | struct cmd_list_element *c; | |
836 | ||
837 | init_exec_ops (); | |
838 | ||
839 | if (!dbx_commands) | |
840 | { | |
1a966eab AC |
841 | c = add_cmd ("file", class_files, file_command, _("\ |
842 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
843 | It is read for its symbols, for getting the contents of pure memory,\n\ |
844 | and it is the program executed when you use the `run' command.\n\ | |
845 | If FILE cannot be found as specified, your execution directory path\n\ | |
846 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 847 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 848 | set_cmd_completer (c, filename_completer); |
c906108c SS |
849 | } |
850 | ||
1a966eab AC |
851 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
852 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
853 | If FILE cannot be found as specified, your execution directory path\n\ |
854 | is searched for a command of that name.\n\ | |
1a966eab | 855 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 856 | set_cmd_completer (c, filename_completer); |
c906108c | 857 | |
1bedd215 AC |
858 | add_com ("section", class_files, set_section_command, _("\ |
859 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
860 | This can be used if the exec file does not contain section addresses,\n\ |
861 | (such as in the a.out format), or when the addresses specified in the\n\ | |
862 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 863 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 864 | |
5bf193a2 AC |
865 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
866 | Set writing into executable and core files."), _("\ | |
867 | Show writing into executable and core files."), NULL, | |
868 | NULL, | |
920d2a44 | 869 | show_write_files, |
5bf193a2 | 870 | &setlist, &showlist); |
c5aa993b | 871 | |
c906108c SS |
872 | add_target (&exec_ops); |
873 | } | |
be4d1333 MS |
874 | |
875 | static char * | |
876 | exec_make_note_section (bfd *obfd, int *note_size) | |
877 | { | |
8a3fe4f8 | 878 | error (_("Can't create a corefile")); |
be4d1333 | 879 | } |