Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
32d0add0 | 3 | Copyright (C) 1988-2015 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" |
c906108c SS |
41 | #include "gdbcore.h" |
42 | ||
43 | #include <ctype.h> | |
53ce3c39 | 44 | #include <sys/stat.h> |
c906108c | 45 | |
9a4105ab | 46 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
47 | |
48 | /* Prototypes for local functions */ | |
49 | ||
a14ed312 | 50 | static void file_command (char *, int); |
c906108c | 51 | |
a14ed312 | 52 | static void set_section_command (char *, int); |
c906108c | 53 | |
a14ed312 | 54 | static void exec_files_info (struct target_ops *); |
c906108c | 55 | |
a14ed312 | 56 | static void init_exec_ops (void); |
c906108c | 57 | |
a14ed312 | 58 | void _initialize_exec (void); |
c906108c | 59 | |
c906108c SS |
60 | /* The target vector for executable files. */ |
61 | ||
e8b2341c | 62 | static struct target_ops exec_ops; |
c906108c | 63 | |
c906108c SS |
64 | /* Whether to open exec and core files read-only or read-write. */ |
65 | ||
66 | int write_files = 0; | |
920d2a44 AC |
67 | static void |
68 | show_write_files (struct ui_file *file, int from_tty, | |
69 | struct cmd_list_element *c, const char *value) | |
70 | { | |
71 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
72 | value); | |
73 | } | |
74 | ||
c906108c | 75 | |
4c42eaff | 76 | static void |
014f9477 | 77 | exec_open (const char *args, int from_tty) |
1adeb98a FN |
78 | { |
79 | target_preopen (from_tty); | |
80 | exec_file_attach (args, from_tty); | |
81 | } | |
82 | ||
07b82ea5 PA |
83 | /* Close and clear exec_bfd. If we end up with no target sections to |
84 | read memory from, this unpushes the exec_ops target. */ | |
85 | ||
6c95b8df PA |
86 | void |
87 | exec_close (void) | |
07b82ea5 PA |
88 | { |
89 | if (exec_bfd) | |
90 | { | |
91 | bfd *abfd = exec_bfd; | |
07b82ea5 | 92 | |
cbb099e8 | 93 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
94 | |
95 | /* Removing target sections may close the exec_ops target. | |
96 | Clear exec_bfd before doing so to prevent recursion. */ | |
97 | exec_bfd = NULL; | |
98 | exec_bfd_mtime = 0; | |
99 | ||
046ac79f | 100 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
101 | |
102 | xfree (exec_filename); | |
103 | exec_filename = NULL; | |
07b82ea5 PA |
104 | } |
105 | } | |
106 | ||
6c95b8df PA |
107 | /* This is the target_close implementation. Clears all target |
108 | sections and closes all executable bfds from all program spaces. */ | |
109 | ||
c906108c | 110 | static void |
de90e03d | 111 | exec_close_1 (struct target_ops *self) |
c906108c | 112 | { |
ab16fce8 TT |
113 | struct program_space *ss; |
114 | struct cleanup *old_chain; | |
6c95b8df | 115 | |
ab16fce8 TT |
116 | old_chain = save_current_program_space (); |
117 | ALL_PSPACES (ss) | |
6c95b8df | 118 | { |
ab16fce8 TT |
119 | set_current_program_space (ss); |
120 | clear_section_table (current_target_sections); | |
121 | exec_close (); | |
6c95b8df | 122 | } |
ab16fce8 TT |
123 | |
124 | do_cleanups (old_chain); | |
c906108c SS |
125 | } |
126 | ||
1adeb98a FN |
127 | void |
128 | exec_file_clear (int from_tty) | |
129 | { | |
130 | /* Remove exec file. */ | |
6c95b8df | 131 | exec_close (); |
1adeb98a FN |
132 | |
133 | if (from_tty) | |
a3f17187 | 134 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
135 | } |
136 | ||
907083d1 | 137 | /* Set FILENAME as the new exec file. |
c906108c | 138 | |
c5aa993b JM |
139 | This function is intended to be behave essentially the same |
140 | as exec_file_command, except that the latter will detect when | |
141 | a target is being debugged, and will ask the user whether it | |
142 | should be shut down first. (If the answer is "no", then the | |
143 | new file is ignored.) | |
c906108c | 144 | |
c5aa993b JM |
145 | This file is used by exec_file_command, to do the work of opening |
146 | and processing the exec file after any prompting has happened. | |
c906108c | 147 | |
c5aa993b JM |
148 | And, it is used by child_attach, when the attach command was |
149 | given a pid but not a exec pathname, and the attach command could | |
150 | figure out the pathname from the pid. (In this case, we shouldn't | |
151 | ask the user whether the current target should be shut down -- | |
907083d1 | 152 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
153 | |
154 | void | |
5f08566b | 155 | exec_file_attach (const char *filename, int from_tty) |
c906108c | 156 | { |
9b333ba3 TT |
157 | struct cleanup *cleanups; |
158 | ||
159 | /* First, acquire a reference to the current exec_bfd. We release | |
160 | this at the end of the function; but acquiring it now lets the | |
161 | BFD cache return it if this call refers to the same file. */ | |
162 | gdb_bfd_ref (exec_bfd); | |
163 | cleanups = make_cleanup_bfd_unref (exec_bfd); | |
164 | ||
c906108c | 165 | /* Remove any previous exec file. */ |
6c95b8df | 166 | exec_close (); |
c906108c SS |
167 | |
168 | /* Now open and digest the file the user requested, if any. */ | |
169 | ||
1adeb98a FN |
170 | if (!filename) |
171 | { | |
172 | if (from_tty) | |
a3f17187 | 173 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
174 | |
175 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
176 | } |
177 | else | |
c906108c | 178 | { |
64c0b5de | 179 | int load_via_target = 0; |
1f0c4988 | 180 | char *scratch_pathname, *canonical_pathname; |
c906108c | 181 | int scratch_chan; |
07b82ea5 | 182 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 183 | char **matching; |
c5aa993b | 184 | |
64c0b5de GB |
185 | if (is_target_filename (filename)) |
186 | { | |
187 | if (target_filesystem_is_local ()) | |
188 | filename += strlen (TARGET_SYSROOT_PREFIX); | |
189 | else | |
190 | load_via_target = 1; | |
191 | } | |
192 | ||
193 | if (load_via_target) | |
c5aa993b | 194 | { |
64c0b5de GB |
195 | /* gdb_bfd_fopen does not support "target:" filenames. */ |
196 | if (write_files) | |
197 | warning (_("writing into executable files is " | |
198 | "not supported for %s sysroots"), | |
199 | TARGET_SYSROOT_PREFIX); | |
200 | ||
201 | scratch_pathname = xstrdup (filename); | |
202 | make_cleanup (xfree, scratch_pathname); | |
203 | ||
204 | scratch_chan = -1; | |
d7f9d729 | 205 | |
64c0b5de | 206 | canonical_pathname = scratch_pathname; |
c5aa993b | 207 | } |
64c0b5de GB |
208 | else |
209 | { | |
210 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
211 | filename, write_files ? | |
212 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, | |
213 | &scratch_pathname); | |
214 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) | |
215 | if (scratch_chan < 0) | |
216 | { | |
217 | char *exename = alloca (strlen (filename) + 5); | |
218 | ||
219 | strcat (strcpy (exename, filename), ".exe"); | |
220 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
221 | exename, write_files ? | |
222 | O_RDWR | O_BINARY | |
223 | : O_RDONLY | O_BINARY, | |
224 | &scratch_pathname); | |
225 | } | |
c906108c | 226 | #endif |
64c0b5de GB |
227 | if (scratch_chan < 0) |
228 | perror_with_name (filename); | |
a4453b7e | 229 | |
64c0b5de | 230 | make_cleanup (xfree, scratch_pathname); |
a4453b7e | 231 | |
64c0b5de GB |
232 | /* gdb_bfd_open (and its variants) prefers canonicalized |
233 | pathname for better BFD caching. */ | |
234 | canonical_pathname = gdb_realpath (scratch_pathname); | |
235 | make_cleanup (xfree, canonical_pathname); | |
236 | } | |
1f0c4988 | 237 | |
64c0b5de | 238 | if (write_files && !load_via_target) |
1f0c4988 | 239 | exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget, |
1c00ec6b TT |
240 | FOPEN_RUB, scratch_chan); |
241 | else | |
1f0c4988 | 242 | exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
c906108c SS |
243 | |
244 | if (!exec_bfd) | |
9fe4a216 | 245 | { |
9fe4a216 TT |
246 | error (_("\"%s\": could not open as an executable file: %s"), |
247 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
248 | } | |
c906108c | 249 | |
64c0b5de GB |
250 | /* gdb_realpath_keepfile resolves symlinks on the local |
251 | filesystem and so cannot be used for "target:" files. */ | |
1f0c4988 | 252 | gdb_assert (exec_filename == NULL); |
64c0b5de GB |
253 | if (load_via_target) |
254 | exec_filename = xstrdup (bfd_get_filename (exec_bfd)); | |
255 | else | |
256 | exec_filename = gdb_realpath_keepfile (scratch_pathname); | |
1f0c4988 | 257 | |
d18b8b7a | 258 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
259 | { |
260 | /* Make sure to close exec_bfd, or else "run" might try to use | |
261 | it. */ | |
6c95b8df | 262 | exec_close (); |
8a3fe4f8 | 263 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
264 | scratch_pathname, |
265 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
266 | } |
267 | ||
07b82ea5 | 268 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
269 | { |
270 | /* Make sure to close exec_bfd, or else "run" might try to use | |
271 | it. */ | |
6c95b8df | 272 | exec_close (); |
8a3fe4f8 | 273 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
274 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
275 | } | |
276 | ||
c04ea773 DJ |
277 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
278 | ||
c906108c SS |
279 | validate_files (); |
280 | ||
281 | set_gdbarch_from_file (exec_bfd); | |
282 | ||
07b82ea5 | 283 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
284 | list of sections. This possibly pushes the exec_ops |
285 | target. */ | |
ed9eebaf | 286 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 287 | xfree (sections); |
c906108c SS |
288 | |
289 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
290 | if (deprecated_exec_file_display_hook) |
291 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 292 | } |
9b333ba3 TT |
293 | |
294 | do_cleanups (cleanups); | |
295 | ||
ce7d4522 | 296 | bfd_cache_close_all (); |
781b42b0 | 297 | observer_notify_executable_changed (); |
c906108c SS |
298 | } |
299 | ||
300 | /* Process the first arg in ARGS as the new exec file. | |
301 | ||
c5aa993b JM |
302 | Note that we have to explicitly ignore additional args, since we can |
303 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
304 | which can take multiple args. |
305 | ||
0963b4bd | 306 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 307 | |
1adeb98a | 308 | static void |
fba45db2 | 309 | exec_file_command (char *args, int from_tty) |
c906108c | 310 | { |
1adeb98a FN |
311 | char **argv; |
312 | char *filename; | |
4c42eaff DJ |
313 | |
314 | if (from_tty && target_has_execution | |
315 | && !query (_("A program is being debugged already.\n" | |
316 | "Are you sure you want to change the file? "))) | |
317 | error (_("File not changed.")); | |
1adeb98a FN |
318 | |
319 | if (args) | |
320 | { | |
f7545552 TT |
321 | struct cleanup *cleanups; |
322 | ||
1adeb98a FN |
323 | /* Scan through the args and pick up the first non option arg |
324 | as the filename. */ | |
325 | ||
d1a41061 | 326 | argv = gdb_buildargv (args); |
f7545552 | 327 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
328 | |
329 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
330 | {; | |
331 | } | |
332 | if (*argv == NULL) | |
8a3fe4f8 | 333 | error (_("No executable file name was specified")); |
1adeb98a FN |
334 | |
335 | filename = tilde_expand (*argv); | |
336 | make_cleanup (xfree, filename); | |
337 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
338 | |
339 | do_cleanups (cleanups); | |
1adeb98a FN |
340 | } |
341 | else | |
342 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
343 | } |
344 | ||
0963b4bd | 345 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
346 | What a novelty. Why did GDB go through four major releases before this |
347 | command was added? */ | |
348 | ||
349 | static void | |
fba45db2 | 350 | file_command (char *arg, int from_tty) |
c906108c SS |
351 | { |
352 | /* FIXME, if we lose on reading the symbol file, we should revert | |
353 | the exec file, but that's rough. */ | |
354 | exec_file_command (arg, from_tty); | |
355 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
356 | if (deprecated_file_changed_hook) |
357 | deprecated_file_changed_hook (arg); | |
c906108c | 358 | } |
c906108c | 359 | \f |
c5aa993b | 360 | |
0963b4bd | 361 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
362 | table_pp_char is a char * to get it through bfd_map_over_sections; |
363 | we cast it back to its proper type. */ | |
364 | ||
365 | static void | |
7be0c536 AC |
366 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
367 | void *table_pp_char) | |
c906108c | 368 | { |
0542c86d | 369 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
370 | flagword aflag; |
371 | ||
2b2848e2 DE |
372 | gdb_assert (abfd == asect->owner); |
373 | ||
0f5d55d8 JB |
374 | /* Check the section flags, but do not discard zero-length sections, since |
375 | some symbols may still be attached to this section. For instance, we | |
376 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
377 | section to which a symbol named "_end" was attached. The address | |
378 | of this symbol still needs to be relocated. */ | |
c906108c SS |
379 | aflag = bfd_get_section_flags (abfd, asect); |
380 | if (!(aflag & SEC_ALLOC)) | |
381 | return; | |
0f5d55d8 | 382 | |
046ac79f | 383 | (*table_pp)->owner = NULL; |
c906108c SS |
384 | (*table_pp)->the_bfd_section = asect; |
385 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
386 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
387 | (*table_pp)++; | |
388 | } | |
389 | ||
a5b1fd27 DE |
390 | /* See exec.h. */ |
391 | ||
392 | void | |
393 | clear_section_table (struct target_section_table *table) | |
394 | { | |
395 | xfree (table->sections); | |
396 | table->sections = table->sections_end = NULL; | |
397 | } | |
398 | ||
399 | /* Resize section table TABLE by ADJUSTMENT. | |
400 | ADJUSTMENT may be negative, in which case the caller must have already | |
401 | removed the sections being deleted. | |
402 | Returns the old size. */ | |
403 | ||
404 | static int | |
405 | resize_section_table (struct target_section_table *table, int adjustment) | |
07b82ea5 | 406 | { |
07b82ea5 PA |
407 | int old_count; |
408 | int new_count; | |
409 | ||
07b82ea5 PA |
410 | old_count = table->sections_end - table->sections; |
411 | ||
a5b1fd27 | 412 | new_count = adjustment + old_count; |
07b82ea5 PA |
413 | |
414 | if (new_count) | |
415 | { | |
416 | table->sections = xrealloc (table->sections, | |
417 | sizeof (struct target_section) * new_count); | |
418 | table->sections_end = table->sections + new_count; | |
419 | } | |
420 | else | |
a5b1fd27 | 421 | clear_section_table (table); |
07b82ea5 PA |
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) |
3e43a32a MS |
442 | internal_error (__FILE__, __LINE__, |
443 | _("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 | |
046ac79f | 452 | add_target_sections (void *owner, |
ed9eebaf | 453 | struct target_section *sections, |
07b82ea5 PA |
454 | struct target_section *sections_end) |
455 | { | |
456 | int count; | |
457 | struct target_section_table *table = current_target_sections; | |
458 | ||
459 | count = sections_end - sections; | |
460 | ||
461 | if (count > 0) | |
462 | { | |
463 | int space = resize_section_table (table, count); | |
ed9eebaf | 464 | int i; |
d7f9d729 | 465 | |
ed9eebaf TT |
466 | for (i = 0; i < count; ++i) |
467 | { | |
468 | table->sections[space + i] = sections[i]; | |
046ac79f | 469 | table->sections[space + i].owner = owner; |
ed9eebaf | 470 | } |
07b82ea5 PA |
471 | |
472 | /* If these are the first file sections we can provide memory | |
473 | from, push the file_stratum target. */ | |
ab16fce8 TT |
474 | if (!target_is_pushed (&exec_ops)) |
475 | push_target (&exec_ops); | |
07b82ea5 PA |
476 | } |
477 | } | |
478 | ||
76ad5e1e NB |
479 | /* Add the sections of OBJFILE to the current set of target sections. */ |
480 | ||
481 | void | |
482 | add_target_sections_of_objfile (struct objfile *objfile) | |
483 | { | |
484 | struct target_section_table *table = current_target_sections; | |
485 | struct obj_section *osect; | |
486 | int space; | |
487 | unsigned count = 0; | |
488 | struct target_section *ts; | |
489 | ||
490 | if (objfile == NULL) | |
491 | return; | |
492 | ||
493 | /* Compute the number of sections to add. */ | |
494 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
495 | { | |
496 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
497 | continue; | |
498 | count++; | |
499 | } | |
500 | ||
501 | if (count == 0) | |
502 | return; | |
503 | ||
504 | space = resize_section_table (table, count); | |
505 | ||
506 | ts = table->sections + space; | |
507 | ||
508 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
509 | { | |
510 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
511 | continue; | |
512 | ||
513 | gdb_assert (ts < table->sections + space + count); | |
514 | ||
515 | ts->addr = obj_section_addr (osect); | |
516 | ts->endaddr = obj_section_endaddr (osect); | |
517 | ts->the_bfd_section = osect->the_bfd_section; | |
518 | ts->owner = (void *) objfile; | |
519 | ||
520 | ts++; | |
521 | } | |
522 | } | |
523 | ||
046ac79f JK |
524 | /* Remove all target sections owned by OWNER. |
525 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
526 | |
527 | void | |
046ac79f | 528 | remove_target_sections (void *owner) |
07b82ea5 PA |
529 | { |
530 | struct target_section *src, *dest; | |
07b82ea5 PA |
531 | struct target_section_table *table = current_target_sections; |
532 | ||
046ac79f JK |
533 | gdb_assert (owner != NULL); |
534 | ||
07b82ea5 PA |
535 | dest = table->sections; |
536 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 537 | if (src->owner != owner) |
07b82ea5 PA |
538 | { |
539 | /* Keep this section. */ | |
540 | if (dest < src) | |
541 | *dest = *src; | |
542 | dest++; | |
543 | } | |
544 | ||
545 | /* If we've dropped any sections, resize the section table. */ | |
546 | if (dest < src) | |
547 | { | |
548 | int old_count; | |
549 | ||
550 | old_count = resize_section_table (table, dest - src); | |
551 | ||
552 | /* If we don't have any more sections to read memory from, | |
553 | remove the file_stratum target from the stack. */ | |
554 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
555 | { |
556 | struct program_space *pspace; | |
557 | ||
558 | ALL_PSPACES (pspace) | |
559 | if (pspace->target_sections.sections | |
560 | != pspace->target_sections.sections_end) | |
561 | return; | |
562 | ||
563 | unpush_target (&exec_ops); | |
564 | } | |
07b82ea5 PA |
565 | } |
566 | } | |
567 | ||
c906108c | 568 | \f |
348f8c02 | 569 | |
1ca49d37 YQ |
570 | enum target_xfer_status |
571 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
572 | ULONGEST len, ULONGEST *xfered_len) | |
573 | { | |
574 | /* It's unduly pedantic to refuse to look at the executable for | |
575 | read-only pieces; so do the equivalent of readonly regions aka | |
576 | QTro packet. */ | |
577 | if (exec_bfd != NULL) | |
578 | { | |
579 | asection *s; | |
580 | bfd_size_type size; | |
581 | bfd_vma vma; | |
582 | ||
583 | for (s = exec_bfd->sections; s; s = s->next) | |
584 | { | |
585 | if ((s->flags & SEC_LOAD) == 0 | |
586 | || (s->flags & SEC_READONLY) == 0) | |
587 | continue; | |
588 | ||
589 | vma = s->vma; | |
590 | size = bfd_get_section_size (s); | |
591 | if (vma <= offset && offset < (vma + size)) | |
592 | { | |
593 | ULONGEST amt; | |
594 | ||
595 | amt = (vma + size) - offset; | |
596 | if (amt > len) | |
597 | amt = len; | |
598 | ||
599 | amt = bfd_get_section_contents (exec_bfd, s, | |
600 | readbuf, offset - vma, amt); | |
601 | ||
602 | if (amt == 0) | |
603 | return TARGET_XFER_EOF; | |
604 | else | |
605 | { | |
606 | *xfered_len = amt; | |
607 | return TARGET_XFER_OK; | |
608 | } | |
609 | } | |
610 | } | |
611 | } | |
612 | ||
613 | /* Indicate failure to find the requested memory block. */ | |
614 | return TARGET_XFER_E_IO; | |
615 | } | |
616 | ||
5a2eb0ef YQ |
617 | /* Appends all read-only memory ranges found in the target section |
618 | table defined by SECTIONS and SECTIONS_END, starting at (and | |
619 | intersected with) MEMADDR for LEN bytes. Returns the augmented | |
620 | VEC. */ | |
621 | ||
622 | static VEC(mem_range_s) * | |
e6ca34fc | 623 | section_table_available_memory (VEC(mem_range_s) *memory, |
424447ee | 624 | CORE_ADDR memaddr, ULONGEST len, |
e6ca34fc PA |
625 | struct target_section *sections, |
626 | struct target_section *sections_end) | |
627 | { | |
628 | struct target_section *p; | |
e6ca34fc PA |
629 | |
630 | for (p = sections; p < sections_end; p++) | |
631 | { | |
2b2848e2 DE |
632 | if ((bfd_get_section_flags (p->the_bfd_section->owner, |
633 | p->the_bfd_section) | |
e6ca34fc PA |
634 | & SEC_READONLY) == 0) |
635 | continue; | |
636 | ||
637 | /* Copy the meta-data, adjusted. */ | |
638 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
639 | { | |
640 | ULONGEST lo1, hi1, lo2, hi2; | |
641 | struct mem_range *r; | |
642 | ||
643 | lo1 = memaddr; | |
644 | hi1 = memaddr + len; | |
645 | ||
646 | lo2 = p->addr; | |
647 | hi2 = p->endaddr; | |
648 | ||
649 | r = VEC_safe_push (mem_range_s, memory, NULL); | |
650 | ||
651 | r->start = max (lo1, lo2); | |
652 | r->length = min (hi1, hi2) - r->start; | |
653 | } | |
654 | } | |
655 | ||
656 | return memory; | |
657 | } | |
658 | ||
1ee79381 YQ |
659 | enum target_xfer_status |
660 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
661 | ULONGEST len, ULONGEST *xfered_len) | |
662 | { | |
663 | VEC(mem_range_s) *available_memory = NULL; | |
664 | struct target_section_table *table; | |
665 | struct cleanup *old_chain; | |
666 | mem_range_s *r; | |
667 | int i; | |
668 | ||
669 | table = target_get_section_table (&exec_ops); | |
670 | available_memory = section_table_available_memory (available_memory, | |
671 | offset, len, | |
672 | table->sections, | |
673 | table->sections_end); | |
674 | ||
675 | old_chain = make_cleanup (VEC_cleanup(mem_range_s), | |
676 | &available_memory); | |
677 | ||
678 | normalize_mem_ranges (available_memory); | |
679 | ||
680 | for (i = 0; | |
681 | VEC_iterate (mem_range_s, available_memory, i, r); | |
682 | i++) | |
683 | { | |
684 | if (mem_ranges_overlap (r->start, r->length, offset, len)) | |
685 | { | |
686 | CORE_ADDR end; | |
687 | enum target_xfer_status status; | |
688 | ||
689 | /* Get the intersection window. */ | |
690 | end = min (offset + len, r->start + r->length); | |
691 | ||
692 | gdb_assert (end - offset <= len); | |
693 | ||
694 | if (offset >= r->start) | |
695 | status = exec_read_partial_read_only (readbuf, offset, | |
696 | end - offset, | |
697 | xfered_len); | |
698 | else | |
699 | { | |
700 | *xfered_len = r->start - offset; | |
bc113b4e | 701 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
702 | } |
703 | do_cleanups (old_chain); | |
704 | return status; | |
705 | } | |
706 | } | |
707 | do_cleanups (old_chain); | |
708 | ||
709 | *xfered_len = len; | |
bc113b4e | 710 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
711 | } |
712 | ||
9b409511 | 713 | enum target_xfer_status |
07b82ea5 | 714 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 715 | ULONGEST offset, ULONGEST len, |
9b409511 | 716 | ULONGEST *xfered_len, |
07b82ea5 PA |
717 | struct target_section *sections, |
718 | struct target_section *sections_end, | |
719 | const char *section_name) | |
c906108c | 720 | { |
020cc13c | 721 | int res; |
0542c86d | 722 | struct target_section *p; |
07b82ea5 PA |
723 | ULONGEST memaddr = offset; |
724 | ULONGEST memend = memaddr + len; | |
c906108c | 725 | |
b55e14c7 | 726 | if (len == 0) |
3e43a32a MS |
727 | internal_error (__FILE__, __LINE__, |
728 | _("failed internal consistency check")); | |
c906108c | 729 | |
348f8c02 | 730 | for (p = sections; p < sections_end; p++) |
c906108c | 731 | { |
2b2848e2 DE |
732 | struct bfd_section *asect = p->the_bfd_section; |
733 | bfd *abfd = asect->owner; | |
734 | ||
735 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 736 | continue; /* not the section we need. */ |
c906108c | 737 | if (memaddr >= p->addr) |
3db26b01 JB |
738 | { |
739 | if (memend <= p->endaddr) | |
740 | { | |
741 | /* Entire transfer is within this section. */ | |
07b82ea5 | 742 | if (writebuf) |
2b2848e2 | 743 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 744 | writebuf, memaddr - p->addr, |
85302095 AC |
745 | len); |
746 | else | |
2b2848e2 | 747 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 748 | readbuf, memaddr - p->addr, |
85302095 | 749 | len); |
9b409511 YQ |
750 | |
751 | if (res != 0) | |
752 | { | |
753 | *xfered_len = len; | |
754 | return TARGET_XFER_OK; | |
755 | } | |
756 | else | |
757 | return TARGET_XFER_EOF; | |
3db26b01 JB |
758 | } |
759 | else if (memaddr >= p->endaddr) | |
760 | { | |
761 | /* This section ends before the transfer starts. */ | |
762 | continue; | |
763 | } | |
764 | else | |
765 | { | |
766 | /* This section overlaps the transfer. Just do half. */ | |
767 | len = p->endaddr - memaddr; | |
07b82ea5 | 768 | if (writebuf) |
2b2848e2 | 769 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 770 | writebuf, memaddr - p->addr, |
85302095 AC |
771 | len); |
772 | else | |
2b2848e2 | 773 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 774 | readbuf, memaddr - p->addr, |
85302095 | 775 | len); |
9b409511 YQ |
776 | if (res != 0) |
777 | { | |
778 | *xfered_len = len; | |
779 | return TARGET_XFER_OK; | |
780 | } | |
781 | else | |
782 | return TARGET_XFER_EOF; | |
3db26b01 JB |
783 | } |
784 | } | |
c906108c SS |
785 | } |
786 | ||
9b409511 | 787 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 788 | } |
348f8c02 | 789 | |
70221824 | 790 | static struct target_section_table * |
07b82ea5 | 791 | exec_get_section_table (struct target_ops *ops) |
348f8c02 | 792 | { |
07b82ea5 | 793 | return current_target_sections; |
348f8c02 PA |
794 | } |
795 | ||
9b409511 | 796 | static enum target_xfer_status |
07b82ea5 PA |
797 | exec_xfer_partial (struct target_ops *ops, enum target_object object, |
798 | const char *annex, gdb_byte *readbuf, | |
799 | const gdb_byte *writebuf, | |
9b409511 | 800 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
348f8c02 | 801 | { |
07b82ea5 PA |
802 | struct target_section_table *table = target_get_section_table (ops); |
803 | ||
804 | if (object == TARGET_OBJECT_MEMORY) | |
805 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 806 | offset, len, xfered_len, |
07b82ea5 PA |
807 | table->sections, |
808 | table->sections_end, | |
809 | NULL); | |
810 | else | |
2ed4b548 | 811 | return TARGET_XFER_E_IO; |
348f8c02 | 812 | } |
c906108c | 813 | \f |
c5aa993b | 814 | |
c906108c | 815 | void |
07b82ea5 | 816 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 817 | { |
5af949e3 | 818 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 819 | struct target_section *p; |
17a912b6 | 820 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 821 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 822 | |
c5aa993b | 823 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 824 | wrap_here (" "); |
a3f17187 | 825 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 826 | if (abfd == exec_bfd) |
51bee8e9 | 827 | { |
3e43a32a MS |
828 | /* gcc-3.4 does not like the initialization in |
829 | <p == t->sections_end>. */ | |
d904de5b | 830 | bfd_vma displacement = 0; |
2f1bdd26 | 831 | bfd_vma entry_point; |
51bee8e9 JK |
832 | |
833 | for (p = t->sections; p < t->sections_end; p++) | |
834 | { | |
2b2848e2 DE |
835 | struct bfd_section *psect = p->the_bfd_section; |
836 | bfd *pbfd = psect->owner; | |
51bee8e9 | 837 | |
2b2848e2 | 838 | if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
839 | != (SEC_ALLOC | SEC_LOAD)) |
840 | continue; | |
841 | ||
2b2848e2 DE |
842 | if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address |
843 | && abfd->start_address < (bfd_get_section_vma (pbfd, psect) | |
844 | + bfd_get_section_size (psect))) | |
51bee8e9 | 845 | { |
2b2848e2 | 846 | displacement = p->addr - bfd_get_section_vma (pbfd, psect); |
51bee8e9 JK |
847 | break; |
848 | } | |
849 | } | |
850 | if (p == t->sections_end) | |
b37520b6 | 851 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 852 | bfd_get_filename (abfd)); |
51bee8e9 | 853 | |
2f1bdd26 MGD |
854 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
855 | bfd_get_start_address (abfd) | |
856 | + displacement); | |
51bee8e9 | 857 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 858 | paddress (gdbarch, entry_point)); |
51bee8e9 | 859 | } |
07b82ea5 | 860 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 861 | { |
2b2848e2 DE |
862 | struct bfd_section *psect = p->the_bfd_section; |
863 | bfd *pbfd = psect->owner; | |
864 | ||
bb599908 PH |
865 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
866 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
867 | |
868 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
869 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
870 | since most output will then be much wider than necessary. It | |
871 | may make sense to test the size of the file and choose the | |
872 | format string accordingly. */ | |
a3f17187 | 873 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
874 | if (info_verbose) |
875 | printf_filtered (" @ %s", | |
2b2848e2 DE |
876 | hex_string_custom (psect->filepos, 8)); |
877 | printf_filtered (" is %s", bfd_section_name (pbfd, psect)); | |
878 | if (pbfd != abfd) | |
879 | printf_filtered (" in %s", bfd_get_filename (pbfd)); | |
c906108c SS |
880 | printf_filtered ("\n"); |
881 | } | |
882 | } | |
883 | ||
884 | static void | |
fba45db2 | 885 | exec_files_info (struct target_ops *t) |
c906108c | 886 | { |
57008375 JK |
887 | if (exec_bfd) |
888 | print_section_info (current_target_sections, exec_bfd); | |
889 | else | |
890 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
891 | } |
892 | ||
893 | static void | |
fba45db2 | 894 | set_section_command (char *args, int from_tty) |
c906108c | 895 | { |
0542c86d | 896 | struct target_section *p; |
c906108c SS |
897 | char *secname; |
898 | unsigned seclen; | |
899 | unsigned long secaddr; | |
900 | char secprint[100]; | |
901 | long offset; | |
07b82ea5 | 902 | struct target_section_table *table; |
c906108c SS |
903 | |
904 | if (args == 0) | |
8a3fe4f8 | 905 | error (_("Must specify section name and its virtual address")); |
c906108c | 906 | |
0963b4bd | 907 | /* Parse out section name. */ |
c5aa993b | 908 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
909 | seclen = args - secname; |
910 | ||
0963b4bd | 911 | /* Parse out new virtual address. */ |
c906108c SS |
912 | secaddr = parse_and_eval_address (args); |
913 | ||
07b82ea5 PA |
914 | table = current_target_sections; |
915 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 916 | { |
57008375 | 917 | if (!strncmp (secname, bfd_section_name (p->bfd, |
3e43a32a | 918 | p->the_bfd_section), seclen) |
57008375 | 919 | && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0') |
c5aa993b JM |
920 | { |
921 | offset = secaddr - p->addr; | |
922 | p->addr += offset; | |
923 | p->endaddr += offset; | |
924 | if (from_tty) | |
925 | exec_files_info (&exec_ops); | |
926 | return; | |
927 | } | |
c906108c | 928 | } |
c906108c SS |
929 | if (seclen >= sizeof (secprint)) |
930 | seclen = sizeof (secprint) - 1; | |
931 | strncpy (secprint, secname, seclen); | |
932 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 933 | error (_("Section %s not found"), secprint); |
c906108c SS |
934 | } |
935 | ||
30510692 DJ |
936 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
937 | it to ADDRESS. */ | |
c1bd25fd DJ |
938 | |
939 | void | |
940 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
941 | { | |
0542c86d | 942 | struct target_section *p; |
07b82ea5 | 943 | struct target_section_table *table; |
c1bd25fd | 944 | |
07b82ea5 PA |
945 | table = current_target_sections; |
946 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 947 | { |
2b2848e2 | 948 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 949 | && index == p->the_bfd_section->index) |
c1bd25fd | 950 | { |
30510692 | 951 | p->endaddr += address - p->addr; |
c1bd25fd | 952 | p->addr = address; |
c1bd25fd DJ |
953 | } |
954 | } | |
955 | } | |
956 | ||
c906108c SS |
957 | /* If mourn is being called in all the right places, this could be say |
958 | `gdb internal error' (since generic_mourn calls | |
959 | breakpoint_init_inferior). */ | |
960 | ||
961 | static int | |
3db08215 MM |
962 | ignore (struct target_ops *ops, struct gdbarch *gdbarch, |
963 | struct bp_target_info *bp_tgt) | |
c906108c SS |
964 | { |
965 | return 0; | |
966 | } | |
967 | ||
c35b1492 PA |
968 | static int |
969 | exec_has_memory (struct target_ops *ops) | |
970 | { | |
971 | /* We can provide memory if we have any file/target sections to read | |
972 | from. */ | |
973 | return (current_target_sections->sections | |
974 | != current_target_sections->sections_end); | |
975 | } | |
976 | ||
83814951 TT |
977 | static char * |
978 | exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) | |
979 | { | |
980 | error (_("Can't create a corefile")); | |
981 | } | |
be4d1333 | 982 | |
c906108c SS |
983 | /* Fill in the exec file target vector. Very few entries need to be |
984 | defined. */ | |
985 | ||
be4d1333 | 986 | static void |
fba45db2 | 987 | init_exec_ops (void) |
c906108c SS |
988 | { |
989 | exec_ops.to_shortname = "exec"; | |
990 | exec_ops.to_longname = "Local exec file"; | |
991 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
992 | Specify the filename of the executable file."; | |
1adeb98a | 993 | exec_ops.to_open = exec_open; |
6c95b8df | 994 | exec_ops.to_close = exec_close_1; |
07b82ea5 PA |
995 | exec_ops.to_xfer_partial = exec_xfer_partial; |
996 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
997 | exec_ops.to_files_info = exec_files_info; |
998 | exec_ops.to_insert_breakpoint = ignore; | |
999 | exec_ops.to_remove_breakpoint = ignore; | |
c906108c | 1000 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 1001 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 1002 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
b427c1bc | 1003 | exec_ops.to_find_memory_regions = objfile_find_memory_regions; |
c5aa993b | 1004 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1005 | } |
1006 | ||
1007 | void | |
fba45db2 | 1008 | _initialize_exec (void) |
c906108c SS |
1009 | { |
1010 | struct cmd_list_element *c; | |
1011 | ||
1012 | init_exec_ops (); | |
1013 | ||
1014 | if (!dbx_commands) | |
1015 | { | |
1a966eab AC |
1016 | c = add_cmd ("file", class_files, file_command, _("\ |
1017 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
1018 | It is read for its symbols, for getting the contents of pure memory,\n\ |
1019 | and it is the program executed when you use the `run' command.\n\ | |
1020 | If FILE cannot be found as specified, your execution directory path\n\ | |
1021 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 1022 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 1023 | set_cmd_completer (c, filename_completer); |
c906108c SS |
1024 | } |
1025 | ||
1a966eab AC |
1026 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
1027 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
1028 | If FILE cannot be found as specified, your execution directory path\n\ |
1029 | is searched for a command of that name.\n\ | |
1a966eab | 1030 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 1031 | set_cmd_completer (c, filename_completer); |
c906108c | 1032 | |
1bedd215 AC |
1033 | add_com ("section", class_files, set_section_command, _("\ |
1034 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1035 | This can be used if the exec file does not contain section addresses,\n\ |
1036 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1037 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1038 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1039 | |
5bf193a2 AC |
1040 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1041 | Set writing into executable and core files."), _("\ | |
1042 | Show writing into executable and core files."), NULL, | |
1043 | NULL, | |
920d2a44 | 1044 | show_write_files, |
5bf193a2 | 1045 | &setlist, &showlist); |
c5aa993b | 1046 | |
9852c492 | 1047 | add_target_with_completer (&exec_ops, filename_completer); |
c906108c | 1048 | } |