Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
ecd75fc8 | 3 | Copyright (C) 1988-2014 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "frame.h" | |
22 | #include "inferior.h" | |
23 | #include "target.h" | |
24 | #include "gdbcmd.h" | |
25 | #include "language.h" | |
0ba1096a | 26 | #include "filenames.h" |
c906108c SS |
27 | #include "symfile.h" |
28 | #include "objfiles.h" | |
c5f0f3d0 | 29 | #include "completer.h" |
fd0407d6 | 30 | #include "value.h" |
4646aa9d | 31 | #include "exec.h" |
ea53e89f | 32 | #include "observer.h" |
dacec2a8 | 33 | #include "arch-utils.h" |
6c95b8df PA |
34 | #include "gdbthread.h" |
35 | #include "progspace.h" | |
cbb099e8 | 36 | #include "gdb_bfd.h" |
b427c1bc | 37 | #include "gcore.h" |
c906108c | 38 | |
c906108c | 39 | #include <fcntl.h> |
dbda9972 | 40 | #include "readline/readline.h" |
0e9f083f | 41 | #include <string.h> |
c906108c SS |
42 | |
43 | #include "gdbcore.h" | |
44 | ||
45 | #include <ctype.h> | |
53ce3c39 | 46 | #include <sys/stat.h> |
c906108c | 47 | |
9a4105ab | 48 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
49 | |
50 | /* Prototypes for local functions */ | |
51 | ||
a14ed312 | 52 | static void file_command (char *, int); |
c906108c | 53 | |
a14ed312 | 54 | static void set_section_command (char *, int); |
c906108c | 55 | |
a14ed312 | 56 | static void exec_files_info (struct target_ops *); |
c906108c | 57 | |
a14ed312 | 58 | static void init_exec_ops (void); |
c906108c | 59 | |
a14ed312 | 60 | void _initialize_exec (void); |
c906108c | 61 | |
c906108c SS |
62 | /* The target vector for executable files. */ |
63 | ||
e8b2341c | 64 | static struct target_ops exec_ops; |
c906108c | 65 | |
c906108c SS |
66 | /* Whether to open exec and core files read-only or read-write. */ |
67 | ||
68 | int write_files = 0; | |
920d2a44 AC |
69 | static void |
70 | show_write_files (struct ui_file *file, int from_tty, | |
71 | struct cmd_list_element *c, const char *value) | |
72 | { | |
73 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
74 | value); | |
75 | } | |
76 | ||
c906108c | 77 | |
4c42eaff | 78 | static void |
1adeb98a FN |
79 | exec_open (char *args, int from_tty) |
80 | { | |
81 | target_preopen (from_tty); | |
82 | exec_file_attach (args, from_tty); | |
83 | } | |
84 | ||
07b82ea5 PA |
85 | /* Close and clear exec_bfd. If we end up with no target sections to |
86 | read memory from, this unpushes the exec_ops target. */ | |
87 | ||
6c95b8df PA |
88 | void |
89 | exec_close (void) | |
07b82ea5 PA |
90 | { |
91 | if (exec_bfd) | |
92 | { | |
93 | bfd *abfd = exec_bfd; | |
07b82ea5 | 94 | |
cbb099e8 | 95 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
96 | |
97 | /* Removing target sections may close the exec_ops target. | |
98 | Clear exec_bfd before doing so to prevent recursion. */ | |
99 | exec_bfd = NULL; | |
100 | exec_bfd_mtime = 0; | |
101 | ||
046ac79f | 102 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
103 | |
104 | xfree (exec_filename); | |
105 | exec_filename = NULL; | |
07b82ea5 PA |
106 | } |
107 | } | |
108 | ||
6c95b8df PA |
109 | /* This is the target_close implementation. Clears all target |
110 | sections and closes all executable bfds from all program spaces. */ | |
111 | ||
c906108c | 112 | static void |
de90e03d | 113 | exec_close_1 (struct target_ops *self) |
c906108c | 114 | { |
ab16fce8 TT |
115 | struct program_space *ss; |
116 | struct cleanup *old_chain; | |
6c95b8df | 117 | |
ab16fce8 TT |
118 | old_chain = save_current_program_space (); |
119 | ALL_PSPACES (ss) | |
6c95b8df | 120 | { |
ab16fce8 TT |
121 | set_current_program_space (ss); |
122 | clear_section_table (current_target_sections); | |
123 | exec_close (); | |
6c95b8df | 124 | } |
ab16fce8 TT |
125 | |
126 | do_cleanups (old_chain); | |
c906108c SS |
127 | } |
128 | ||
1adeb98a FN |
129 | void |
130 | exec_file_clear (int from_tty) | |
131 | { | |
132 | /* Remove exec file. */ | |
6c95b8df | 133 | exec_close (); |
1adeb98a FN |
134 | |
135 | if (from_tty) | |
a3f17187 | 136 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
137 | } |
138 | ||
907083d1 | 139 | /* Set FILENAME as the new exec file. |
c906108c | 140 | |
c5aa993b JM |
141 | This function is intended to be behave essentially the same |
142 | as exec_file_command, except that the latter will detect when | |
143 | a target is being debugged, and will ask the user whether it | |
144 | should be shut down first. (If the answer is "no", then the | |
145 | new file is ignored.) | |
c906108c | 146 | |
c5aa993b JM |
147 | This file is used by exec_file_command, to do the work of opening |
148 | and processing the exec file after any prompting has happened. | |
c906108c | 149 | |
c5aa993b JM |
150 | And, it is used by child_attach, when the attach command was |
151 | given a pid but not a exec pathname, and the attach command could | |
152 | figure out the pathname from the pid. (In this case, we shouldn't | |
153 | ask the user whether the current target should be shut down -- | |
907083d1 | 154 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
155 | |
156 | void | |
1adeb98a | 157 | exec_file_attach (char *filename, int from_tty) |
c906108c | 158 | { |
9b333ba3 TT |
159 | struct cleanup *cleanups; |
160 | ||
161 | /* First, acquire a reference to the current exec_bfd. We release | |
162 | this at the end of the function; but acquiring it now lets the | |
163 | BFD cache return it if this call refers to the same file. */ | |
164 | gdb_bfd_ref (exec_bfd); | |
165 | cleanups = make_cleanup_bfd_unref (exec_bfd); | |
166 | ||
c906108c | 167 | /* Remove any previous exec file. */ |
6c95b8df | 168 | exec_close (); |
c906108c SS |
169 | |
170 | /* Now open and digest the file the user requested, if any. */ | |
171 | ||
1adeb98a FN |
172 | if (!filename) |
173 | { | |
174 | if (from_tty) | |
a3f17187 | 175 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
176 | |
177 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
178 | } |
179 | else | |
c906108c | 180 | { |
1f0c4988 | 181 | char *scratch_pathname, *canonical_pathname; |
c906108c | 182 | int scratch_chan; |
07b82ea5 | 183 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 184 | char **matching; |
c5aa993b | 185 | |
492c0ab7 | 186 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 187 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 188 | &scratch_pathname); |
cfc3008e | 189 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 190 | if (scratch_chan < 0) |
c5aa993b JM |
191 | { |
192 | char *exename = alloca (strlen (filename) + 5); | |
d7f9d729 | 193 | |
c5aa993b | 194 | strcat (strcpy (exename, filename), ".exe"); |
492c0ab7 | 195 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 196 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 197 | &scratch_pathname); |
c5aa993b | 198 | } |
c906108c | 199 | #endif |
17d6efc4 JB |
200 | if (scratch_chan < 0) |
201 | perror_with_name (filename); | |
a4453b7e | 202 | |
9b333ba3 | 203 | make_cleanup (xfree, scratch_pathname); |
a4453b7e | 204 | |
1f0c4988 JK |
205 | /* gdb_bfd_open (and its variants) prefers canonicalized pathname for |
206 | better BFD caching. */ | |
207 | canonical_pathname = gdb_realpath (scratch_pathname); | |
208 | make_cleanup (xfree, canonical_pathname); | |
209 | ||
1c00ec6b | 210 | if (write_files) |
1f0c4988 | 211 | exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget, |
1c00ec6b TT |
212 | FOPEN_RUB, scratch_chan); |
213 | else | |
1f0c4988 | 214 | exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
c906108c SS |
215 | |
216 | if (!exec_bfd) | |
9fe4a216 | 217 | { |
9fe4a216 TT |
218 | error (_("\"%s\": could not open as an executable file: %s"), |
219 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
220 | } | |
c906108c | 221 | |
1f0c4988 | 222 | gdb_assert (exec_filename == NULL); |
4856b6bc | 223 | exec_filename = gdb_realpath_keepfile (scratch_pathname); |
1f0c4988 | 224 | |
d18b8b7a | 225 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
226 | { |
227 | /* Make sure to close exec_bfd, or else "run" might try to use | |
228 | it. */ | |
6c95b8df | 229 | exec_close (); |
8a3fe4f8 | 230 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
231 | scratch_pathname, |
232 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
233 | } |
234 | ||
07b82ea5 | 235 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
236 | { |
237 | /* Make sure to close exec_bfd, or else "run" might try to use | |
238 | it. */ | |
6c95b8df | 239 | exec_close (); |
8a3fe4f8 | 240 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
241 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
242 | } | |
243 | ||
c04ea773 DJ |
244 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
245 | ||
c906108c SS |
246 | validate_files (); |
247 | ||
248 | set_gdbarch_from_file (exec_bfd); | |
249 | ||
07b82ea5 | 250 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
251 | list of sections. This possibly pushes the exec_ops |
252 | target. */ | |
ed9eebaf | 253 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 254 | xfree (sections); |
c906108c SS |
255 | |
256 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
257 | if (deprecated_exec_file_display_hook) |
258 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 259 | } |
9b333ba3 TT |
260 | |
261 | do_cleanups (cleanups); | |
262 | ||
ce7d4522 | 263 | bfd_cache_close_all (); |
781b42b0 | 264 | observer_notify_executable_changed (); |
c906108c SS |
265 | } |
266 | ||
267 | /* Process the first arg in ARGS as the new exec file. | |
268 | ||
c5aa993b JM |
269 | Note that we have to explicitly ignore additional args, since we can |
270 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
271 | which can take multiple args. |
272 | ||
0963b4bd | 273 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 274 | |
1adeb98a | 275 | static void |
fba45db2 | 276 | exec_file_command (char *args, int from_tty) |
c906108c | 277 | { |
1adeb98a FN |
278 | char **argv; |
279 | char *filename; | |
4c42eaff DJ |
280 | |
281 | if (from_tty && target_has_execution | |
282 | && !query (_("A program is being debugged already.\n" | |
283 | "Are you sure you want to change the file? "))) | |
284 | error (_("File not changed.")); | |
1adeb98a FN |
285 | |
286 | if (args) | |
287 | { | |
f7545552 TT |
288 | struct cleanup *cleanups; |
289 | ||
1adeb98a FN |
290 | /* Scan through the args and pick up the first non option arg |
291 | as the filename. */ | |
292 | ||
d1a41061 | 293 | argv = gdb_buildargv (args); |
f7545552 | 294 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
295 | |
296 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
297 | {; | |
298 | } | |
299 | if (*argv == NULL) | |
8a3fe4f8 | 300 | error (_("No executable file name was specified")); |
1adeb98a FN |
301 | |
302 | filename = tilde_expand (*argv); | |
303 | make_cleanup (xfree, filename); | |
304 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
305 | |
306 | do_cleanups (cleanups); | |
1adeb98a FN |
307 | } |
308 | else | |
309 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
310 | } |
311 | ||
0963b4bd | 312 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
313 | What a novelty. Why did GDB go through four major releases before this |
314 | command was added? */ | |
315 | ||
316 | static void | |
fba45db2 | 317 | file_command (char *arg, int from_tty) |
c906108c SS |
318 | { |
319 | /* FIXME, if we lose on reading the symbol file, we should revert | |
320 | the exec file, but that's rough. */ | |
321 | exec_file_command (arg, from_tty); | |
322 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
323 | if (deprecated_file_changed_hook) |
324 | deprecated_file_changed_hook (arg); | |
c906108c | 325 | } |
c906108c | 326 | \f |
c5aa993b | 327 | |
0963b4bd | 328 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
329 | table_pp_char is a char * to get it through bfd_map_over_sections; |
330 | we cast it back to its proper type. */ | |
331 | ||
332 | static void | |
7be0c536 AC |
333 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
334 | void *table_pp_char) | |
c906108c | 335 | { |
0542c86d | 336 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
337 | flagword aflag; |
338 | ||
2b2848e2 DE |
339 | gdb_assert (abfd == asect->owner); |
340 | ||
0f5d55d8 JB |
341 | /* Check the section flags, but do not discard zero-length sections, since |
342 | some symbols may still be attached to this section. For instance, we | |
343 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
344 | section to which a symbol named "_end" was attached. The address | |
345 | of this symbol still needs to be relocated. */ | |
c906108c SS |
346 | aflag = bfd_get_section_flags (abfd, asect); |
347 | if (!(aflag & SEC_ALLOC)) | |
348 | return; | |
0f5d55d8 | 349 | |
046ac79f | 350 | (*table_pp)->owner = NULL; |
c906108c SS |
351 | (*table_pp)->the_bfd_section = asect; |
352 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
353 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
354 | (*table_pp)++; | |
355 | } | |
356 | ||
a5b1fd27 DE |
357 | /* See exec.h. */ |
358 | ||
359 | void | |
360 | clear_section_table (struct target_section_table *table) | |
361 | { | |
362 | xfree (table->sections); | |
363 | table->sections = table->sections_end = NULL; | |
364 | } | |
365 | ||
366 | /* Resize section table TABLE by ADJUSTMENT. | |
367 | ADJUSTMENT may be negative, in which case the caller must have already | |
368 | removed the sections being deleted. | |
369 | Returns the old size. */ | |
370 | ||
371 | static int | |
372 | resize_section_table (struct target_section_table *table, int adjustment) | |
07b82ea5 | 373 | { |
07b82ea5 PA |
374 | int old_count; |
375 | int new_count; | |
376 | ||
07b82ea5 PA |
377 | old_count = table->sections_end - table->sections; |
378 | ||
a5b1fd27 | 379 | new_count = adjustment + old_count; |
07b82ea5 PA |
380 | |
381 | if (new_count) | |
382 | { | |
383 | table->sections = xrealloc (table->sections, | |
384 | sizeof (struct target_section) * new_count); | |
385 | table->sections_end = table->sections + new_count; | |
386 | } | |
387 | else | |
a5b1fd27 | 388 | clear_section_table (table); |
07b82ea5 PA |
389 | |
390 | return old_count; | |
391 | } | |
392 | ||
c906108c SS |
393 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
394 | Returns 0 if OK, 1 on error. */ | |
395 | ||
396 | int | |
0542c86d PA |
397 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
398 | struct target_section **end) | |
c906108c SS |
399 | { |
400 | unsigned count; | |
401 | ||
402 | count = bfd_count_sections (some_bfd); | |
403 | if (*start) | |
b8c9b27d | 404 | xfree (* start); |
0542c86d | 405 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 406 | *end = *start; |
c5aa993b | 407 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 408 | if (*end > *start + count) |
3e43a32a MS |
409 | internal_error (__FILE__, __LINE__, |
410 | _("failed internal consistency check")); | |
c906108c SS |
411 | /* We could realloc the table, but it probably loses for most files. */ |
412 | return 0; | |
413 | } | |
07b82ea5 PA |
414 | |
415 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
416 | current set of target sections. */ | |
417 | ||
418 | void | |
046ac79f | 419 | add_target_sections (void *owner, |
ed9eebaf | 420 | struct target_section *sections, |
07b82ea5 PA |
421 | struct target_section *sections_end) |
422 | { | |
423 | int count; | |
424 | struct target_section_table *table = current_target_sections; | |
425 | ||
426 | count = sections_end - sections; | |
427 | ||
428 | if (count > 0) | |
429 | { | |
430 | int space = resize_section_table (table, count); | |
ed9eebaf | 431 | int i; |
d7f9d729 | 432 | |
ed9eebaf TT |
433 | for (i = 0; i < count; ++i) |
434 | { | |
435 | table->sections[space + i] = sections[i]; | |
046ac79f | 436 | table->sections[space + i].owner = owner; |
ed9eebaf | 437 | } |
07b82ea5 PA |
438 | |
439 | /* If these are the first file sections we can provide memory | |
440 | from, push the file_stratum target. */ | |
ab16fce8 TT |
441 | if (!target_is_pushed (&exec_ops)) |
442 | push_target (&exec_ops); | |
07b82ea5 PA |
443 | } |
444 | } | |
445 | ||
76ad5e1e NB |
446 | /* Add the sections of OBJFILE to the current set of target sections. */ |
447 | ||
448 | void | |
449 | add_target_sections_of_objfile (struct objfile *objfile) | |
450 | { | |
451 | struct target_section_table *table = current_target_sections; | |
452 | struct obj_section *osect; | |
453 | int space; | |
454 | unsigned count = 0; | |
455 | struct target_section *ts; | |
456 | ||
457 | if (objfile == NULL) | |
458 | return; | |
459 | ||
460 | /* Compute the number of sections to add. */ | |
461 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
462 | { | |
463 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
464 | continue; | |
465 | count++; | |
466 | } | |
467 | ||
468 | if (count == 0) | |
469 | return; | |
470 | ||
471 | space = resize_section_table (table, count); | |
472 | ||
473 | ts = table->sections + space; | |
474 | ||
475 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
476 | { | |
477 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
478 | continue; | |
479 | ||
480 | gdb_assert (ts < table->sections + space + count); | |
481 | ||
482 | ts->addr = obj_section_addr (osect); | |
483 | ts->endaddr = obj_section_endaddr (osect); | |
484 | ts->the_bfd_section = osect->the_bfd_section; | |
485 | ts->owner = (void *) objfile; | |
486 | ||
487 | ts++; | |
488 | } | |
489 | } | |
490 | ||
046ac79f JK |
491 | /* Remove all target sections owned by OWNER. |
492 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
493 | |
494 | void | |
046ac79f | 495 | remove_target_sections (void *owner) |
07b82ea5 PA |
496 | { |
497 | struct target_section *src, *dest; | |
07b82ea5 PA |
498 | struct target_section_table *table = current_target_sections; |
499 | ||
046ac79f JK |
500 | gdb_assert (owner != NULL); |
501 | ||
07b82ea5 PA |
502 | dest = table->sections; |
503 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 504 | if (src->owner != owner) |
07b82ea5 PA |
505 | { |
506 | /* Keep this section. */ | |
507 | if (dest < src) | |
508 | *dest = *src; | |
509 | dest++; | |
510 | } | |
511 | ||
512 | /* If we've dropped any sections, resize the section table. */ | |
513 | if (dest < src) | |
514 | { | |
515 | int old_count; | |
516 | ||
517 | old_count = resize_section_table (table, dest - src); | |
518 | ||
519 | /* If we don't have any more sections to read memory from, | |
520 | remove the file_stratum target from the stack. */ | |
521 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
522 | { |
523 | struct program_space *pspace; | |
524 | ||
525 | ALL_PSPACES (pspace) | |
526 | if (pspace->target_sections.sections | |
527 | != pspace->target_sections.sections_end) | |
528 | return; | |
529 | ||
530 | unpush_target (&exec_ops); | |
531 | } | |
07b82ea5 PA |
532 | } |
533 | } | |
534 | ||
c906108c | 535 | \f |
348f8c02 | 536 | |
1ca49d37 YQ |
537 | enum target_xfer_status |
538 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
539 | ULONGEST len, ULONGEST *xfered_len) | |
540 | { | |
541 | /* It's unduly pedantic to refuse to look at the executable for | |
542 | read-only pieces; so do the equivalent of readonly regions aka | |
543 | QTro packet. */ | |
544 | if (exec_bfd != NULL) | |
545 | { | |
546 | asection *s; | |
547 | bfd_size_type size; | |
548 | bfd_vma vma; | |
549 | ||
550 | for (s = exec_bfd->sections; s; s = s->next) | |
551 | { | |
552 | if ((s->flags & SEC_LOAD) == 0 | |
553 | || (s->flags & SEC_READONLY) == 0) | |
554 | continue; | |
555 | ||
556 | vma = s->vma; | |
557 | size = bfd_get_section_size (s); | |
558 | if (vma <= offset && offset < (vma + size)) | |
559 | { | |
560 | ULONGEST amt; | |
561 | ||
562 | amt = (vma + size) - offset; | |
563 | if (amt > len) | |
564 | amt = len; | |
565 | ||
566 | amt = bfd_get_section_contents (exec_bfd, s, | |
567 | readbuf, offset - vma, amt); | |
568 | ||
569 | if (amt == 0) | |
570 | return TARGET_XFER_EOF; | |
571 | else | |
572 | { | |
573 | *xfered_len = amt; | |
574 | return TARGET_XFER_OK; | |
575 | } | |
576 | } | |
577 | } | |
578 | } | |
579 | ||
580 | /* Indicate failure to find the requested memory block. */ | |
581 | return TARGET_XFER_E_IO; | |
582 | } | |
583 | ||
5a2eb0ef YQ |
584 | /* Appends all read-only memory ranges found in the target section |
585 | table defined by SECTIONS and SECTIONS_END, starting at (and | |
586 | intersected with) MEMADDR for LEN bytes. Returns the augmented | |
587 | VEC. */ | |
588 | ||
589 | static VEC(mem_range_s) * | |
e6ca34fc | 590 | section_table_available_memory (VEC(mem_range_s) *memory, |
424447ee | 591 | CORE_ADDR memaddr, ULONGEST len, |
e6ca34fc PA |
592 | struct target_section *sections, |
593 | struct target_section *sections_end) | |
594 | { | |
595 | struct target_section *p; | |
e6ca34fc PA |
596 | |
597 | for (p = sections; p < sections_end; p++) | |
598 | { | |
2b2848e2 DE |
599 | if ((bfd_get_section_flags (p->the_bfd_section->owner, |
600 | p->the_bfd_section) | |
e6ca34fc PA |
601 | & SEC_READONLY) == 0) |
602 | continue; | |
603 | ||
604 | /* Copy the meta-data, adjusted. */ | |
605 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
606 | { | |
607 | ULONGEST lo1, hi1, lo2, hi2; | |
608 | struct mem_range *r; | |
609 | ||
610 | lo1 = memaddr; | |
611 | hi1 = memaddr + len; | |
612 | ||
613 | lo2 = p->addr; | |
614 | hi2 = p->endaddr; | |
615 | ||
616 | r = VEC_safe_push (mem_range_s, memory, NULL); | |
617 | ||
618 | r->start = max (lo1, lo2); | |
619 | r->length = min (hi1, hi2) - r->start; | |
620 | } | |
621 | } | |
622 | ||
623 | return memory; | |
624 | } | |
625 | ||
1ee79381 YQ |
626 | enum target_xfer_status |
627 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
628 | ULONGEST len, ULONGEST *xfered_len) | |
629 | { | |
630 | VEC(mem_range_s) *available_memory = NULL; | |
631 | struct target_section_table *table; | |
632 | struct cleanup *old_chain; | |
633 | mem_range_s *r; | |
634 | int i; | |
635 | ||
636 | table = target_get_section_table (&exec_ops); | |
637 | available_memory = section_table_available_memory (available_memory, | |
638 | offset, len, | |
639 | table->sections, | |
640 | table->sections_end); | |
641 | ||
642 | old_chain = make_cleanup (VEC_cleanup(mem_range_s), | |
643 | &available_memory); | |
644 | ||
645 | normalize_mem_ranges (available_memory); | |
646 | ||
647 | for (i = 0; | |
648 | VEC_iterate (mem_range_s, available_memory, i, r); | |
649 | i++) | |
650 | { | |
651 | if (mem_ranges_overlap (r->start, r->length, offset, len)) | |
652 | { | |
653 | CORE_ADDR end; | |
654 | enum target_xfer_status status; | |
655 | ||
656 | /* Get the intersection window. */ | |
657 | end = min (offset + len, r->start + r->length); | |
658 | ||
659 | gdb_assert (end - offset <= len); | |
660 | ||
661 | if (offset >= r->start) | |
662 | status = exec_read_partial_read_only (readbuf, offset, | |
663 | end - offset, | |
664 | xfered_len); | |
665 | else | |
666 | { | |
667 | *xfered_len = r->start - offset; | |
bc113b4e | 668 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
669 | } |
670 | do_cleanups (old_chain); | |
671 | return status; | |
672 | } | |
673 | } | |
674 | do_cleanups (old_chain); | |
675 | ||
676 | *xfered_len = len; | |
bc113b4e | 677 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
678 | } |
679 | ||
9b409511 | 680 | enum target_xfer_status |
07b82ea5 | 681 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 682 | ULONGEST offset, ULONGEST len, |
9b409511 | 683 | ULONGEST *xfered_len, |
07b82ea5 PA |
684 | struct target_section *sections, |
685 | struct target_section *sections_end, | |
686 | const char *section_name) | |
c906108c | 687 | { |
020cc13c | 688 | int res; |
0542c86d | 689 | struct target_section *p; |
07b82ea5 PA |
690 | ULONGEST memaddr = offset; |
691 | ULONGEST memend = memaddr + len; | |
c906108c | 692 | |
b55e14c7 | 693 | if (len == 0) |
3e43a32a MS |
694 | internal_error (__FILE__, __LINE__, |
695 | _("failed internal consistency check")); | |
c906108c | 696 | |
348f8c02 | 697 | for (p = sections; p < sections_end; p++) |
c906108c | 698 | { |
2b2848e2 DE |
699 | struct bfd_section *asect = p->the_bfd_section; |
700 | bfd *abfd = asect->owner; | |
701 | ||
702 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 703 | continue; /* not the section we need. */ |
c906108c | 704 | if (memaddr >= p->addr) |
3db26b01 JB |
705 | { |
706 | if (memend <= p->endaddr) | |
707 | { | |
708 | /* Entire transfer is within this section. */ | |
07b82ea5 | 709 | if (writebuf) |
2b2848e2 | 710 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 711 | writebuf, memaddr - p->addr, |
85302095 AC |
712 | len); |
713 | else | |
2b2848e2 | 714 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 715 | readbuf, memaddr - p->addr, |
85302095 | 716 | len); |
9b409511 YQ |
717 | |
718 | if (res != 0) | |
719 | { | |
720 | *xfered_len = len; | |
721 | return TARGET_XFER_OK; | |
722 | } | |
723 | else | |
724 | return TARGET_XFER_EOF; | |
3db26b01 JB |
725 | } |
726 | else if (memaddr >= p->endaddr) | |
727 | { | |
728 | /* This section ends before the transfer starts. */ | |
729 | continue; | |
730 | } | |
731 | else | |
732 | { | |
733 | /* This section overlaps the transfer. Just do half. */ | |
734 | len = p->endaddr - memaddr; | |
07b82ea5 | 735 | if (writebuf) |
2b2848e2 | 736 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 737 | writebuf, memaddr - p->addr, |
85302095 AC |
738 | len); |
739 | else | |
2b2848e2 | 740 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 741 | readbuf, memaddr - p->addr, |
85302095 | 742 | len); |
9b409511 YQ |
743 | if (res != 0) |
744 | { | |
745 | *xfered_len = len; | |
746 | return TARGET_XFER_OK; | |
747 | } | |
748 | else | |
749 | return TARGET_XFER_EOF; | |
3db26b01 JB |
750 | } |
751 | } | |
c906108c SS |
752 | } |
753 | ||
9b409511 | 754 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 755 | } |
348f8c02 | 756 | |
70221824 | 757 | static struct target_section_table * |
07b82ea5 | 758 | exec_get_section_table (struct target_ops *ops) |
348f8c02 | 759 | { |
07b82ea5 | 760 | return current_target_sections; |
348f8c02 PA |
761 | } |
762 | ||
9b409511 | 763 | static enum target_xfer_status |
07b82ea5 PA |
764 | exec_xfer_partial (struct target_ops *ops, enum target_object object, |
765 | const char *annex, gdb_byte *readbuf, | |
766 | const gdb_byte *writebuf, | |
9b409511 | 767 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
348f8c02 | 768 | { |
07b82ea5 PA |
769 | struct target_section_table *table = target_get_section_table (ops); |
770 | ||
771 | if (object == TARGET_OBJECT_MEMORY) | |
772 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 773 | offset, len, xfered_len, |
07b82ea5 PA |
774 | table->sections, |
775 | table->sections_end, | |
776 | NULL); | |
777 | else | |
2ed4b548 | 778 | return TARGET_XFER_E_IO; |
348f8c02 | 779 | } |
c906108c | 780 | \f |
c5aa993b | 781 | |
c906108c | 782 | void |
07b82ea5 | 783 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 784 | { |
5af949e3 | 785 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 786 | struct target_section *p; |
17a912b6 | 787 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 788 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 789 | |
c5aa993b | 790 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 791 | wrap_here (" "); |
a3f17187 | 792 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 793 | if (abfd == exec_bfd) |
51bee8e9 | 794 | { |
3e43a32a MS |
795 | /* gcc-3.4 does not like the initialization in |
796 | <p == t->sections_end>. */ | |
d904de5b | 797 | bfd_vma displacement = 0; |
2f1bdd26 | 798 | bfd_vma entry_point; |
51bee8e9 JK |
799 | |
800 | for (p = t->sections; p < t->sections_end; p++) | |
801 | { | |
2b2848e2 DE |
802 | struct bfd_section *psect = p->the_bfd_section; |
803 | bfd *pbfd = psect->owner; | |
51bee8e9 | 804 | |
2b2848e2 | 805 | if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
806 | != (SEC_ALLOC | SEC_LOAD)) |
807 | continue; | |
808 | ||
2b2848e2 DE |
809 | if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address |
810 | && abfd->start_address < (bfd_get_section_vma (pbfd, psect) | |
811 | + bfd_get_section_size (psect))) | |
51bee8e9 | 812 | { |
2b2848e2 | 813 | displacement = p->addr - bfd_get_section_vma (pbfd, psect); |
51bee8e9 JK |
814 | break; |
815 | } | |
816 | } | |
817 | if (p == t->sections_end) | |
b37520b6 | 818 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 819 | bfd_get_filename (abfd)); |
51bee8e9 | 820 | |
2f1bdd26 MGD |
821 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
822 | bfd_get_start_address (abfd) | |
823 | + displacement); | |
51bee8e9 | 824 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 825 | paddress (gdbarch, entry_point)); |
51bee8e9 | 826 | } |
07b82ea5 | 827 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 828 | { |
2b2848e2 DE |
829 | struct bfd_section *psect = p->the_bfd_section; |
830 | bfd *pbfd = psect->owner; | |
831 | ||
bb599908 PH |
832 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
833 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
834 | |
835 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
836 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
837 | since most output will then be much wider than necessary. It | |
838 | may make sense to test the size of the file and choose the | |
839 | format string accordingly. */ | |
a3f17187 | 840 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
841 | if (info_verbose) |
842 | printf_filtered (" @ %s", | |
2b2848e2 DE |
843 | hex_string_custom (psect->filepos, 8)); |
844 | printf_filtered (" is %s", bfd_section_name (pbfd, psect)); | |
845 | if (pbfd != abfd) | |
846 | printf_filtered (" in %s", bfd_get_filename (pbfd)); | |
c906108c SS |
847 | printf_filtered ("\n"); |
848 | } | |
849 | } | |
850 | ||
851 | static void | |
fba45db2 | 852 | exec_files_info (struct target_ops *t) |
c906108c | 853 | { |
57008375 JK |
854 | if (exec_bfd) |
855 | print_section_info (current_target_sections, exec_bfd); | |
856 | else | |
857 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
858 | } |
859 | ||
860 | static void | |
fba45db2 | 861 | set_section_command (char *args, int from_tty) |
c906108c | 862 | { |
0542c86d | 863 | struct target_section *p; |
c906108c SS |
864 | char *secname; |
865 | unsigned seclen; | |
866 | unsigned long secaddr; | |
867 | char secprint[100]; | |
868 | long offset; | |
07b82ea5 | 869 | struct target_section_table *table; |
c906108c SS |
870 | |
871 | if (args == 0) | |
8a3fe4f8 | 872 | error (_("Must specify section name and its virtual address")); |
c906108c | 873 | |
0963b4bd | 874 | /* Parse out section name. */ |
c5aa993b | 875 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
876 | seclen = args - secname; |
877 | ||
0963b4bd | 878 | /* Parse out new virtual address. */ |
c906108c SS |
879 | secaddr = parse_and_eval_address (args); |
880 | ||
07b82ea5 PA |
881 | table = current_target_sections; |
882 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 883 | { |
57008375 | 884 | if (!strncmp (secname, bfd_section_name (p->bfd, |
3e43a32a | 885 | p->the_bfd_section), seclen) |
57008375 | 886 | && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0') |
c5aa993b JM |
887 | { |
888 | offset = secaddr - p->addr; | |
889 | p->addr += offset; | |
890 | p->endaddr += offset; | |
891 | if (from_tty) | |
892 | exec_files_info (&exec_ops); | |
893 | return; | |
894 | } | |
c906108c | 895 | } |
c906108c SS |
896 | if (seclen >= sizeof (secprint)) |
897 | seclen = sizeof (secprint) - 1; | |
898 | strncpy (secprint, secname, seclen); | |
899 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 900 | error (_("Section %s not found"), secprint); |
c906108c SS |
901 | } |
902 | ||
30510692 DJ |
903 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
904 | it to ADDRESS. */ | |
c1bd25fd DJ |
905 | |
906 | void | |
907 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
908 | { | |
0542c86d | 909 | struct target_section *p; |
07b82ea5 | 910 | struct target_section_table *table; |
c1bd25fd | 911 | |
07b82ea5 PA |
912 | table = current_target_sections; |
913 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 914 | { |
2b2848e2 | 915 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 916 | && index == p->the_bfd_section->index) |
c1bd25fd | 917 | { |
30510692 | 918 | p->endaddr += address - p->addr; |
c1bd25fd | 919 | p->addr = address; |
c1bd25fd DJ |
920 | } |
921 | } | |
922 | } | |
923 | ||
c906108c SS |
924 | /* If mourn is being called in all the right places, this could be say |
925 | `gdb internal error' (since generic_mourn calls | |
926 | breakpoint_init_inferior). */ | |
927 | ||
928 | static int | |
3db08215 MM |
929 | ignore (struct target_ops *ops, struct gdbarch *gdbarch, |
930 | struct bp_target_info *bp_tgt) | |
c906108c SS |
931 | { |
932 | return 0; | |
933 | } | |
934 | ||
c35b1492 PA |
935 | static int |
936 | exec_has_memory (struct target_ops *ops) | |
937 | { | |
938 | /* We can provide memory if we have any file/target sections to read | |
939 | from. */ | |
940 | return (current_target_sections->sections | |
941 | != current_target_sections->sections_end); | |
942 | } | |
943 | ||
83814951 TT |
944 | static char * |
945 | exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) | |
946 | { | |
947 | error (_("Can't create a corefile")); | |
948 | } | |
be4d1333 | 949 | |
c906108c SS |
950 | /* Fill in the exec file target vector. Very few entries need to be |
951 | defined. */ | |
952 | ||
be4d1333 | 953 | static void |
fba45db2 | 954 | init_exec_ops (void) |
c906108c SS |
955 | { |
956 | exec_ops.to_shortname = "exec"; | |
957 | exec_ops.to_longname = "Local exec file"; | |
958 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
959 | Specify the filename of the executable file."; | |
1adeb98a | 960 | exec_ops.to_open = exec_open; |
6c95b8df | 961 | exec_ops.to_close = exec_close_1; |
07b82ea5 PA |
962 | exec_ops.to_xfer_partial = exec_xfer_partial; |
963 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
964 | exec_ops.to_files_info = exec_files_info; |
965 | exec_ops.to_insert_breakpoint = ignore; | |
966 | exec_ops.to_remove_breakpoint = ignore; | |
c906108c | 967 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 968 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 969 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
b427c1bc | 970 | exec_ops.to_find_memory_regions = objfile_find_memory_regions; |
c5aa993b | 971 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
972 | } |
973 | ||
974 | void | |
fba45db2 | 975 | _initialize_exec (void) |
c906108c SS |
976 | { |
977 | struct cmd_list_element *c; | |
978 | ||
979 | init_exec_ops (); | |
980 | ||
981 | if (!dbx_commands) | |
982 | { | |
1a966eab AC |
983 | c = add_cmd ("file", class_files, file_command, _("\ |
984 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
985 | It is read for its symbols, for getting the contents of pure memory,\n\ |
986 | and it is the program executed when you use the `run' command.\n\ | |
987 | If FILE cannot be found as specified, your execution directory path\n\ | |
988 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 989 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 990 | set_cmd_completer (c, filename_completer); |
c906108c SS |
991 | } |
992 | ||
1a966eab AC |
993 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
994 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
995 | If FILE cannot be found as specified, your execution directory path\n\ |
996 | is searched for a command of that name.\n\ | |
1a966eab | 997 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 998 | set_cmd_completer (c, filename_completer); |
c906108c | 999 | |
1bedd215 AC |
1000 | add_com ("section", class_files, set_section_command, _("\ |
1001 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1002 | This can be used if the exec file does not contain section addresses,\n\ |
1003 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1004 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1005 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1006 | |
5bf193a2 AC |
1007 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1008 | Set writing into executable and core files."), _("\ | |
1009 | Show writing into executable and core files."), NULL, | |
1010 | NULL, | |
920d2a44 | 1011 | show_write_files, |
5bf193a2 | 1012 | &setlist, &showlist); |
c5aa993b | 1013 | |
9852c492 | 1014 | add_target_with_completer (&exec_ops, filename_completer); |
c906108c | 1015 | } |