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 | ||
64 | struct target_ops exec_ops; | |
65 | ||
6c95b8df PA |
66 | /* True if the exec target is pushed on the stack. */ |
67 | static int using_exec_ops; | |
07b82ea5 | 68 | |
c906108c SS |
69 | /* Whether to open exec and core files read-only or read-write. */ |
70 | ||
71 | int write_files = 0; | |
920d2a44 AC |
72 | static void |
73 | show_write_files (struct ui_file *file, int from_tty, | |
74 | struct cmd_list_element *c, const char *value) | |
75 | { | |
76 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
77 | value); | |
78 | } | |
79 | ||
c906108c | 80 | |
4c42eaff | 81 | static void |
1adeb98a FN |
82 | exec_open (char *args, int from_tty) |
83 | { | |
84 | target_preopen (from_tty); | |
85 | exec_file_attach (args, from_tty); | |
86 | } | |
87 | ||
07b82ea5 PA |
88 | /* Close and clear exec_bfd. If we end up with no target sections to |
89 | read memory from, this unpushes the exec_ops target. */ | |
90 | ||
6c95b8df PA |
91 | void |
92 | exec_close (void) | |
07b82ea5 PA |
93 | { |
94 | if (exec_bfd) | |
95 | { | |
96 | bfd *abfd = exec_bfd; | |
07b82ea5 | 97 | |
cbb099e8 | 98 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
99 | |
100 | /* Removing target sections may close the exec_ops target. | |
101 | Clear exec_bfd before doing so to prevent recursion. */ | |
102 | exec_bfd = NULL; | |
103 | exec_bfd_mtime = 0; | |
104 | ||
046ac79f | 105 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
106 | |
107 | xfree (exec_filename); | |
108 | exec_filename = NULL; | |
07b82ea5 PA |
109 | } |
110 | } | |
111 | ||
6c95b8df PA |
112 | /* This is the target_close implementation. Clears all target |
113 | sections and closes all executable bfds from all program spaces. */ | |
114 | ||
c906108c | 115 | static void |
de90e03d | 116 | exec_close_1 (struct target_ops *self) |
c906108c | 117 | { |
6c95b8df PA |
118 | using_exec_ops = 0; |
119 | ||
6c95b8df PA |
120 | { |
121 | struct program_space *ss; | |
122 | struct cleanup *old_chain; | |
c906108c | 123 | |
6c95b8df PA |
124 | old_chain = save_current_program_space (); |
125 | ALL_PSPACES (ss) | |
126 | { | |
127 | set_current_program_space (ss); | |
128 | ||
129 | /* Delete all target sections. */ | |
130 | resize_section_table | |
131 | (current_target_sections, | |
132 | -resize_section_table (current_target_sections, 0)); | |
133 | ||
134 | exec_close (); | |
135 | } | |
136 | ||
137 | do_cleanups (old_chain); | |
138 | } | |
c906108c SS |
139 | } |
140 | ||
1adeb98a FN |
141 | void |
142 | exec_file_clear (int from_tty) | |
143 | { | |
144 | /* Remove exec file. */ | |
6c95b8df | 145 | exec_close (); |
1adeb98a FN |
146 | |
147 | if (from_tty) | |
a3f17187 | 148 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
149 | } |
150 | ||
907083d1 | 151 | /* Set FILENAME as the new exec file. |
c906108c | 152 | |
c5aa993b JM |
153 | This function is intended to be behave essentially the same |
154 | as exec_file_command, except that the latter will detect when | |
155 | a target is being debugged, and will ask the user whether it | |
156 | should be shut down first. (If the answer is "no", then the | |
157 | new file is ignored.) | |
c906108c | 158 | |
c5aa993b JM |
159 | This file is used by exec_file_command, to do the work of opening |
160 | and processing the exec file after any prompting has happened. | |
c906108c | 161 | |
c5aa993b JM |
162 | And, it is used by child_attach, when the attach command was |
163 | given a pid but not a exec pathname, and the attach command could | |
164 | figure out the pathname from the pid. (In this case, we shouldn't | |
165 | ask the user whether the current target should be shut down -- | |
907083d1 | 166 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
167 | |
168 | void | |
1adeb98a | 169 | exec_file_attach (char *filename, int from_tty) |
c906108c | 170 | { |
9b333ba3 TT |
171 | struct cleanup *cleanups; |
172 | ||
173 | /* First, acquire a reference to the current exec_bfd. We release | |
174 | this at the end of the function; but acquiring it now lets the | |
175 | BFD cache return it if this call refers to the same file. */ | |
176 | gdb_bfd_ref (exec_bfd); | |
177 | cleanups = make_cleanup_bfd_unref (exec_bfd); | |
178 | ||
c906108c | 179 | /* Remove any previous exec file. */ |
6c95b8df | 180 | exec_close (); |
c906108c SS |
181 | |
182 | /* Now open and digest the file the user requested, if any. */ | |
183 | ||
1adeb98a FN |
184 | if (!filename) |
185 | { | |
186 | if (from_tty) | |
a3f17187 | 187 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
188 | |
189 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
190 | } |
191 | else | |
c906108c | 192 | { |
1f0c4988 | 193 | char *scratch_pathname, *canonical_pathname; |
c906108c | 194 | int scratch_chan; |
07b82ea5 | 195 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 196 | char **matching; |
c5aa993b | 197 | |
492c0ab7 | 198 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 199 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 200 | &scratch_pathname); |
cfc3008e | 201 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 202 | if (scratch_chan < 0) |
c5aa993b JM |
203 | { |
204 | char *exename = alloca (strlen (filename) + 5); | |
d7f9d729 | 205 | |
c5aa993b | 206 | strcat (strcpy (exename, filename), ".exe"); |
492c0ab7 | 207 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 208 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 209 | &scratch_pathname); |
c5aa993b | 210 | } |
c906108c | 211 | #endif |
17d6efc4 JB |
212 | if (scratch_chan < 0) |
213 | perror_with_name (filename); | |
a4453b7e | 214 | |
9b333ba3 | 215 | make_cleanup (xfree, scratch_pathname); |
a4453b7e | 216 | |
1f0c4988 JK |
217 | /* gdb_bfd_open (and its variants) prefers canonicalized pathname for |
218 | better BFD caching. */ | |
219 | canonical_pathname = gdb_realpath (scratch_pathname); | |
220 | make_cleanup (xfree, canonical_pathname); | |
221 | ||
1c00ec6b | 222 | if (write_files) |
1f0c4988 | 223 | exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget, |
1c00ec6b TT |
224 | FOPEN_RUB, scratch_chan); |
225 | else | |
1f0c4988 | 226 | exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
c906108c SS |
227 | |
228 | if (!exec_bfd) | |
9fe4a216 | 229 | { |
9fe4a216 TT |
230 | error (_("\"%s\": could not open as an executable file: %s"), |
231 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
232 | } | |
c906108c | 233 | |
1f0c4988 | 234 | gdb_assert (exec_filename == NULL); |
4856b6bc | 235 | exec_filename = gdb_realpath_keepfile (scratch_pathname); |
1f0c4988 | 236 | |
d18b8b7a | 237 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
238 | { |
239 | /* Make sure to close exec_bfd, or else "run" might try to use | |
240 | it. */ | |
6c95b8df | 241 | exec_close (); |
8a3fe4f8 | 242 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
243 | scratch_pathname, |
244 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
245 | } |
246 | ||
07b82ea5 | 247 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
248 | { |
249 | /* Make sure to close exec_bfd, or else "run" might try to use | |
250 | it. */ | |
6c95b8df | 251 | exec_close (); |
8a3fe4f8 | 252 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
253 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
254 | } | |
255 | ||
c04ea773 DJ |
256 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
257 | ||
c906108c SS |
258 | validate_files (); |
259 | ||
260 | set_gdbarch_from_file (exec_bfd); | |
261 | ||
07b82ea5 | 262 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
263 | list of sections. This possibly pushes the exec_ops |
264 | target. */ | |
ed9eebaf | 265 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 266 | xfree (sections); |
c906108c SS |
267 | |
268 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
269 | if (deprecated_exec_file_display_hook) |
270 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 271 | } |
9b333ba3 TT |
272 | |
273 | do_cleanups (cleanups); | |
274 | ||
ce7d4522 | 275 | bfd_cache_close_all (); |
781b42b0 | 276 | observer_notify_executable_changed (); |
c906108c SS |
277 | } |
278 | ||
279 | /* Process the first arg in ARGS as the new exec file. | |
280 | ||
c5aa993b JM |
281 | Note that we have to explicitly ignore additional args, since we can |
282 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
283 | which can take multiple args. |
284 | ||
0963b4bd | 285 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 286 | |
1adeb98a | 287 | static void |
fba45db2 | 288 | exec_file_command (char *args, int from_tty) |
c906108c | 289 | { |
1adeb98a FN |
290 | char **argv; |
291 | char *filename; | |
4c42eaff DJ |
292 | |
293 | if (from_tty && target_has_execution | |
294 | && !query (_("A program is being debugged already.\n" | |
295 | "Are you sure you want to change the file? "))) | |
296 | error (_("File not changed.")); | |
1adeb98a FN |
297 | |
298 | if (args) | |
299 | { | |
f7545552 TT |
300 | struct cleanup *cleanups; |
301 | ||
1adeb98a FN |
302 | /* Scan through the args and pick up the first non option arg |
303 | as the filename. */ | |
304 | ||
d1a41061 | 305 | argv = gdb_buildargv (args); |
f7545552 | 306 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
307 | |
308 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
309 | {; | |
310 | } | |
311 | if (*argv == NULL) | |
8a3fe4f8 | 312 | error (_("No executable file name was specified")); |
1adeb98a FN |
313 | |
314 | filename = tilde_expand (*argv); | |
315 | make_cleanup (xfree, filename); | |
316 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
317 | |
318 | do_cleanups (cleanups); | |
1adeb98a FN |
319 | } |
320 | else | |
321 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
322 | } |
323 | ||
0963b4bd | 324 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
325 | What a novelty. Why did GDB go through four major releases before this |
326 | command was added? */ | |
327 | ||
328 | static void | |
fba45db2 | 329 | file_command (char *arg, int from_tty) |
c906108c SS |
330 | { |
331 | /* FIXME, if we lose on reading the symbol file, we should revert | |
332 | the exec file, but that's rough. */ | |
333 | exec_file_command (arg, from_tty); | |
334 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
335 | if (deprecated_file_changed_hook) |
336 | deprecated_file_changed_hook (arg); | |
c906108c | 337 | } |
c906108c | 338 | \f |
c5aa993b | 339 | |
0963b4bd | 340 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
341 | table_pp_char is a char * to get it through bfd_map_over_sections; |
342 | we cast it back to its proper type. */ | |
343 | ||
344 | static void | |
7be0c536 AC |
345 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
346 | void *table_pp_char) | |
c906108c | 347 | { |
0542c86d | 348 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
349 | flagword aflag; |
350 | ||
2b2848e2 DE |
351 | gdb_assert (abfd == asect->owner); |
352 | ||
0f5d55d8 JB |
353 | /* Check the section flags, but do not discard zero-length sections, since |
354 | some symbols may still be attached to this section. For instance, we | |
355 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
356 | section to which a symbol named "_end" was attached. The address | |
357 | of this symbol still needs to be relocated. */ | |
c906108c SS |
358 | aflag = bfd_get_section_flags (abfd, asect); |
359 | if (!(aflag & SEC_ALLOC)) | |
360 | return; | |
0f5d55d8 | 361 | |
046ac79f | 362 | (*table_pp)->owner = NULL; |
c906108c SS |
363 | (*table_pp)->the_bfd_section = asect; |
364 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
365 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
366 | (*table_pp)++; | |
367 | } | |
368 | ||
07b82ea5 PA |
369 | int |
370 | resize_section_table (struct target_section_table *table, int num_added) | |
371 | { | |
07b82ea5 PA |
372 | int old_count; |
373 | int new_count; | |
374 | ||
07b82ea5 PA |
375 | old_count = table->sections_end - table->sections; |
376 | ||
377 | new_count = num_added + old_count; | |
378 | ||
379 | if (new_count) | |
380 | { | |
381 | table->sections = xrealloc (table->sections, | |
382 | sizeof (struct target_section) * new_count); | |
383 | table->sections_end = table->sections + new_count; | |
384 | } | |
385 | else | |
386 | { | |
387 | xfree (table->sections); | |
388 | table->sections = table->sections_end = NULL; | |
389 | } | |
390 | ||
391 | return old_count; | |
392 | } | |
393 | ||
c906108c SS |
394 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
395 | Returns 0 if OK, 1 on error. */ | |
396 | ||
397 | int | |
0542c86d PA |
398 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
399 | struct target_section **end) | |
c906108c SS |
400 | { |
401 | unsigned count; | |
402 | ||
403 | count = bfd_count_sections (some_bfd); | |
404 | if (*start) | |
b8c9b27d | 405 | xfree (* start); |
0542c86d | 406 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 407 | *end = *start; |
c5aa993b | 408 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 409 | if (*end > *start + count) |
3e43a32a MS |
410 | internal_error (__FILE__, __LINE__, |
411 | _("failed internal consistency check")); | |
c906108c SS |
412 | /* We could realloc the table, but it probably loses for most files. */ |
413 | return 0; | |
414 | } | |
07b82ea5 PA |
415 | |
416 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
417 | current set of target sections. */ | |
418 | ||
419 | void | |
046ac79f | 420 | add_target_sections (void *owner, |
ed9eebaf | 421 | struct target_section *sections, |
07b82ea5 PA |
422 | struct target_section *sections_end) |
423 | { | |
424 | int count; | |
425 | struct target_section_table *table = current_target_sections; | |
426 | ||
427 | count = sections_end - sections; | |
428 | ||
429 | if (count > 0) | |
430 | { | |
431 | int space = resize_section_table (table, count); | |
ed9eebaf | 432 | int i; |
d7f9d729 | 433 | |
ed9eebaf TT |
434 | for (i = 0; i < count; ++i) |
435 | { | |
436 | table->sections[space + i] = sections[i]; | |
046ac79f | 437 | table->sections[space + i].owner = owner; |
ed9eebaf | 438 | } |
07b82ea5 PA |
439 | |
440 | /* If these are the first file sections we can provide memory | |
441 | from, push the file_stratum target. */ | |
6c95b8df PA |
442 | if (!using_exec_ops) |
443 | { | |
444 | using_exec_ops = 1; | |
445 | push_target (&exec_ops); | |
446 | } | |
07b82ea5 PA |
447 | } |
448 | } | |
449 | ||
76ad5e1e NB |
450 | /* Add the sections of OBJFILE to the current set of target sections. */ |
451 | ||
452 | void | |
453 | add_target_sections_of_objfile (struct objfile *objfile) | |
454 | { | |
455 | struct target_section_table *table = current_target_sections; | |
456 | struct obj_section *osect; | |
457 | int space; | |
458 | unsigned count = 0; | |
459 | struct target_section *ts; | |
460 | ||
461 | if (objfile == NULL) | |
462 | return; | |
463 | ||
464 | /* Compute the number of sections to add. */ | |
465 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
466 | { | |
467 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
468 | continue; | |
469 | count++; | |
470 | } | |
471 | ||
472 | if (count == 0) | |
473 | return; | |
474 | ||
475 | space = resize_section_table (table, count); | |
476 | ||
477 | ts = table->sections + space; | |
478 | ||
479 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
480 | { | |
481 | if (bfd_get_section_size (osect->the_bfd_section) == 0) | |
482 | continue; | |
483 | ||
484 | gdb_assert (ts < table->sections + space + count); | |
485 | ||
486 | ts->addr = obj_section_addr (osect); | |
487 | ts->endaddr = obj_section_endaddr (osect); | |
488 | ts->the_bfd_section = osect->the_bfd_section; | |
489 | ts->owner = (void *) objfile; | |
490 | ||
491 | ts++; | |
492 | } | |
493 | } | |
494 | ||
046ac79f JK |
495 | /* Remove all target sections owned by OWNER. |
496 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
497 | |
498 | void | |
046ac79f | 499 | remove_target_sections (void *owner) |
07b82ea5 PA |
500 | { |
501 | struct target_section *src, *dest; | |
07b82ea5 PA |
502 | struct target_section_table *table = current_target_sections; |
503 | ||
046ac79f JK |
504 | gdb_assert (owner != NULL); |
505 | ||
07b82ea5 PA |
506 | dest = table->sections; |
507 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 508 | if (src->owner != owner) |
07b82ea5 PA |
509 | { |
510 | /* Keep this section. */ | |
511 | if (dest < src) | |
512 | *dest = *src; | |
513 | dest++; | |
514 | } | |
515 | ||
516 | /* If we've dropped any sections, resize the section table. */ | |
517 | if (dest < src) | |
518 | { | |
519 | int old_count; | |
520 | ||
521 | old_count = resize_section_table (table, dest - src); | |
522 | ||
523 | /* If we don't have any more sections to read memory from, | |
524 | remove the file_stratum target from the stack. */ | |
525 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
526 | { |
527 | struct program_space *pspace; | |
528 | ||
529 | ALL_PSPACES (pspace) | |
530 | if (pspace->target_sections.sections | |
531 | != pspace->target_sections.sections_end) | |
532 | return; | |
533 | ||
534 | unpush_target (&exec_ops); | |
535 | } | |
07b82ea5 PA |
536 | } |
537 | } | |
538 | ||
c906108c | 539 | \f |
348f8c02 | 540 | |
1ca49d37 YQ |
541 | enum target_xfer_status |
542 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
543 | ULONGEST len, ULONGEST *xfered_len) | |
544 | { | |
545 | /* It's unduly pedantic to refuse to look at the executable for | |
546 | read-only pieces; so do the equivalent of readonly regions aka | |
547 | QTro packet. */ | |
548 | if (exec_bfd != NULL) | |
549 | { | |
550 | asection *s; | |
551 | bfd_size_type size; | |
552 | bfd_vma vma; | |
553 | ||
554 | for (s = exec_bfd->sections; s; s = s->next) | |
555 | { | |
556 | if ((s->flags & SEC_LOAD) == 0 | |
557 | || (s->flags & SEC_READONLY) == 0) | |
558 | continue; | |
559 | ||
560 | vma = s->vma; | |
561 | size = bfd_get_section_size (s); | |
562 | if (vma <= offset && offset < (vma + size)) | |
563 | { | |
564 | ULONGEST amt; | |
565 | ||
566 | amt = (vma + size) - offset; | |
567 | if (amt > len) | |
568 | amt = len; | |
569 | ||
570 | amt = bfd_get_section_contents (exec_bfd, s, | |
571 | readbuf, offset - vma, amt); | |
572 | ||
573 | if (amt == 0) | |
574 | return TARGET_XFER_EOF; | |
575 | else | |
576 | { | |
577 | *xfered_len = amt; | |
578 | return TARGET_XFER_OK; | |
579 | } | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | /* Indicate failure to find the requested memory block. */ | |
585 | return TARGET_XFER_E_IO; | |
586 | } | |
587 | ||
5a2eb0ef YQ |
588 | /* Appends all read-only memory ranges found in the target section |
589 | table defined by SECTIONS and SECTIONS_END, starting at (and | |
590 | intersected with) MEMADDR for LEN bytes. Returns the augmented | |
591 | VEC. */ | |
592 | ||
593 | static VEC(mem_range_s) * | |
e6ca34fc | 594 | section_table_available_memory (VEC(mem_range_s) *memory, |
424447ee | 595 | CORE_ADDR memaddr, ULONGEST len, |
e6ca34fc PA |
596 | struct target_section *sections, |
597 | struct target_section *sections_end) | |
598 | { | |
599 | struct target_section *p; | |
e6ca34fc PA |
600 | |
601 | for (p = sections; p < sections_end; p++) | |
602 | { | |
2b2848e2 DE |
603 | if ((bfd_get_section_flags (p->the_bfd_section->owner, |
604 | p->the_bfd_section) | |
e6ca34fc PA |
605 | & SEC_READONLY) == 0) |
606 | continue; | |
607 | ||
608 | /* Copy the meta-data, adjusted. */ | |
609 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
610 | { | |
611 | ULONGEST lo1, hi1, lo2, hi2; | |
612 | struct mem_range *r; | |
613 | ||
614 | lo1 = memaddr; | |
615 | hi1 = memaddr + len; | |
616 | ||
617 | lo2 = p->addr; | |
618 | hi2 = p->endaddr; | |
619 | ||
620 | r = VEC_safe_push (mem_range_s, memory, NULL); | |
621 | ||
622 | r->start = max (lo1, lo2); | |
623 | r->length = min (hi1, hi2) - r->start; | |
624 | } | |
625 | } | |
626 | ||
627 | return memory; | |
628 | } | |
629 | ||
1ee79381 YQ |
630 | enum target_xfer_status |
631 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
632 | ULONGEST len, ULONGEST *xfered_len) | |
633 | { | |
634 | VEC(mem_range_s) *available_memory = NULL; | |
635 | struct target_section_table *table; | |
636 | struct cleanup *old_chain; | |
637 | mem_range_s *r; | |
638 | int i; | |
639 | ||
640 | table = target_get_section_table (&exec_ops); | |
641 | available_memory = section_table_available_memory (available_memory, | |
642 | offset, len, | |
643 | table->sections, | |
644 | table->sections_end); | |
645 | ||
646 | old_chain = make_cleanup (VEC_cleanup(mem_range_s), | |
647 | &available_memory); | |
648 | ||
649 | normalize_mem_ranges (available_memory); | |
650 | ||
651 | for (i = 0; | |
652 | VEC_iterate (mem_range_s, available_memory, i, r); | |
653 | i++) | |
654 | { | |
655 | if (mem_ranges_overlap (r->start, r->length, offset, len)) | |
656 | { | |
657 | CORE_ADDR end; | |
658 | enum target_xfer_status status; | |
659 | ||
660 | /* Get the intersection window. */ | |
661 | end = min (offset + len, r->start + r->length); | |
662 | ||
663 | gdb_assert (end - offset <= len); | |
664 | ||
665 | if (offset >= r->start) | |
666 | status = exec_read_partial_read_only (readbuf, offset, | |
667 | end - offset, | |
668 | xfered_len); | |
669 | else | |
670 | { | |
671 | *xfered_len = r->start - offset; | |
bc113b4e | 672 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
673 | } |
674 | do_cleanups (old_chain); | |
675 | return status; | |
676 | } | |
677 | } | |
678 | do_cleanups (old_chain); | |
679 | ||
680 | *xfered_len = len; | |
bc113b4e | 681 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
682 | } |
683 | ||
9b409511 | 684 | enum target_xfer_status |
07b82ea5 | 685 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 686 | ULONGEST offset, ULONGEST len, |
9b409511 | 687 | ULONGEST *xfered_len, |
07b82ea5 PA |
688 | struct target_section *sections, |
689 | struct target_section *sections_end, | |
690 | const char *section_name) | |
c906108c | 691 | { |
020cc13c | 692 | int res; |
0542c86d | 693 | struct target_section *p; |
07b82ea5 PA |
694 | ULONGEST memaddr = offset; |
695 | ULONGEST memend = memaddr + len; | |
c906108c | 696 | |
b55e14c7 | 697 | if (len == 0) |
3e43a32a MS |
698 | internal_error (__FILE__, __LINE__, |
699 | _("failed internal consistency check")); | |
c906108c | 700 | |
348f8c02 | 701 | for (p = sections; p < sections_end; p++) |
c906108c | 702 | { |
2b2848e2 DE |
703 | struct bfd_section *asect = p->the_bfd_section; |
704 | bfd *abfd = asect->owner; | |
705 | ||
706 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 707 | continue; /* not the section we need. */ |
c906108c | 708 | if (memaddr >= p->addr) |
3db26b01 JB |
709 | { |
710 | if (memend <= p->endaddr) | |
711 | { | |
712 | /* Entire transfer is within this section. */ | |
07b82ea5 | 713 | if (writebuf) |
2b2848e2 | 714 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 715 | writebuf, memaddr - p->addr, |
85302095 AC |
716 | len); |
717 | else | |
2b2848e2 | 718 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 719 | readbuf, memaddr - p->addr, |
85302095 | 720 | len); |
9b409511 YQ |
721 | |
722 | if (res != 0) | |
723 | { | |
724 | *xfered_len = len; | |
725 | return TARGET_XFER_OK; | |
726 | } | |
727 | else | |
728 | return TARGET_XFER_EOF; | |
3db26b01 JB |
729 | } |
730 | else if (memaddr >= p->endaddr) | |
731 | { | |
732 | /* This section ends before the transfer starts. */ | |
733 | continue; | |
734 | } | |
735 | else | |
736 | { | |
737 | /* This section overlaps the transfer. Just do half. */ | |
738 | len = p->endaddr - memaddr; | |
07b82ea5 | 739 | if (writebuf) |
2b2848e2 | 740 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 741 | writebuf, memaddr - p->addr, |
85302095 AC |
742 | len); |
743 | else | |
2b2848e2 | 744 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 745 | readbuf, memaddr - p->addr, |
85302095 | 746 | len); |
9b409511 YQ |
747 | if (res != 0) |
748 | { | |
749 | *xfered_len = len; | |
750 | return TARGET_XFER_OK; | |
751 | } | |
752 | else | |
753 | return TARGET_XFER_EOF; | |
3db26b01 JB |
754 | } |
755 | } | |
c906108c SS |
756 | } |
757 | ||
9b409511 | 758 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 759 | } |
348f8c02 | 760 | |
70221824 | 761 | static struct target_section_table * |
07b82ea5 | 762 | exec_get_section_table (struct target_ops *ops) |
348f8c02 | 763 | { |
07b82ea5 | 764 | return current_target_sections; |
348f8c02 PA |
765 | } |
766 | ||
9b409511 | 767 | static enum target_xfer_status |
07b82ea5 PA |
768 | exec_xfer_partial (struct target_ops *ops, enum target_object object, |
769 | const char *annex, gdb_byte *readbuf, | |
770 | const gdb_byte *writebuf, | |
9b409511 | 771 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
348f8c02 | 772 | { |
07b82ea5 PA |
773 | struct target_section_table *table = target_get_section_table (ops); |
774 | ||
775 | if (object == TARGET_OBJECT_MEMORY) | |
776 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 777 | offset, len, xfered_len, |
07b82ea5 PA |
778 | table->sections, |
779 | table->sections_end, | |
780 | NULL); | |
781 | else | |
2ed4b548 | 782 | return TARGET_XFER_E_IO; |
348f8c02 | 783 | } |
c906108c | 784 | \f |
c5aa993b | 785 | |
c906108c | 786 | void |
07b82ea5 | 787 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 788 | { |
5af949e3 | 789 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 790 | struct target_section *p; |
17a912b6 | 791 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 792 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 793 | |
c5aa993b | 794 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 795 | wrap_here (" "); |
a3f17187 | 796 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 797 | if (abfd == exec_bfd) |
51bee8e9 | 798 | { |
3e43a32a MS |
799 | /* gcc-3.4 does not like the initialization in |
800 | <p == t->sections_end>. */ | |
d904de5b | 801 | bfd_vma displacement = 0; |
2f1bdd26 | 802 | bfd_vma entry_point; |
51bee8e9 JK |
803 | |
804 | for (p = t->sections; p < t->sections_end; p++) | |
805 | { | |
2b2848e2 DE |
806 | struct bfd_section *psect = p->the_bfd_section; |
807 | bfd *pbfd = psect->owner; | |
51bee8e9 | 808 | |
2b2848e2 | 809 | if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
810 | != (SEC_ALLOC | SEC_LOAD)) |
811 | continue; | |
812 | ||
2b2848e2 DE |
813 | if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address |
814 | && abfd->start_address < (bfd_get_section_vma (pbfd, psect) | |
815 | + bfd_get_section_size (psect))) | |
51bee8e9 | 816 | { |
2b2848e2 | 817 | displacement = p->addr - bfd_get_section_vma (pbfd, psect); |
51bee8e9 JK |
818 | break; |
819 | } | |
820 | } | |
821 | if (p == t->sections_end) | |
b37520b6 | 822 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 823 | bfd_get_filename (abfd)); |
51bee8e9 | 824 | |
2f1bdd26 MGD |
825 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
826 | bfd_get_start_address (abfd) | |
827 | + displacement); | |
51bee8e9 | 828 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 829 | paddress (gdbarch, entry_point)); |
51bee8e9 | 830 | } |
07b82ea5 | 831 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 832 | { |
2b2848e2 DE |
833 | struct bfd_section *psect = p->the_bfd_section; |
834 | bfd *pbfd = psect->owner; | |
835 | ||
bb599908 PH |
836 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
837 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
838 | |
839 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
840 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
841 | since most output will then be much wider than necessary. It | |
842 | may make sense to test the size of the file and choose the | |
843 | format string accordingly. */ | |
a3f17187 | 844 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
845 | if (info_verbose) |
846 | printf_filtered (" @ %s", | |
2b2848e2 DE |
847 | hex_string_custom (psect->filepos, 8)); |
848 | printf_filtered (" is %s", bfd_section_name (pbfd, psect)); | |
849 | if (pbfd != abfd) | |
850 | printf_filtered (" in %s", bfd_get_filename (pbfd)); | |
c906108c SS |
851 | printf_filtered ("\n"); |
852 | } | |
853 | } | |
854 | ||
855 | static void | |
fba45db2 | 856 | exec_files_info (struct target_ops *t) |
c906108c | 857 | { |
57008375 JK |
858 | if (exec_bfd) |
859 | print_section_info (current_target_sections, exec_bfd); | |
860 | else | |
861 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
862 | } |
863 | ||
864 | static void | |
fba45db2 | 865 | set_section_command (char *args, int from_tty) |
c906108c | 866 | { |
0542c86d | 867 | struct target_section *p; |
c906108c SS |
868 | char *secname; |
869 | unsigned seclen; | |
870 | unsigned long secaddr; | |
871 | char secprint[100]; | |
872 | long offset; | |
07b82ea5 | 873 | struct target_section_table *table; |
c906108c SS |
874 | |
875 | if (args == 0) | |
8a3fe4f8 | 876 | error (_("Must specify section name and its virtual address")); |
c906108c | 877 | |
0963b4bd | 878 | /* Parse out section name. */ |
c5aa993b | 879 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
880 | seclen = args - secname; |
881 | ||
0963b4bd | 882 | /* Parse out new virtual address. */ |
c906108c SS |
883 | secaddr = parse_and_eval_address (args); |
884 | ||
07b82ea5 PA |
885 | table = current_target_sections; |
886 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 887 | { |
57008375 | 888 | if (!strncmp (secname, bfd_section_name (p->bfd, |
3e43a32a | 889 | p->the_bfd_section), seclen) |
57008375 | 890 | && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0') |
c5aa993b JM |
891 | { |
892 | offset = secaddr - p->addr; | |
893 | p->addr += offset; | |
894 | p->endaddr += offset; | |
895 | if (from_tty) | |
896 | exec_files_info (&exec_ops); | |
897 | return; | |
898 | } | |
c906108c | 899 | } |
c906108c SS |
900 | if (seclen >= sizeof (secprint)) |
901 | seclen = sizeof (secprint) - 1; | |
902 | strncpy (secprint, secname, seclen); | |
903 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 904 | error (_("Section %s not found"), secprint); |
c906108c SS |
905 | } |
906 | ||
30510692 DJ |
907 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
908 | it to ADDRESS. */ | |
c1bd25fd DJ |
909 | |
910 | void | |
911 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
912 | { | |
0542c86d | 913 | struct target_section *p; |
07b82ea5 | 914 | struct target_section_table *table; |
c1bd25fd | 915 | |
07b82ea5 PA |
916 | table = current_target_sections; |
917 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 918 | { |
2b2848e2 | 919 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 920 | && index == p->the_bfd_section->index) |
c1bd25fd | 921 | { |
30510692 | 922 | p->endaddr += address - p->addr; |
c1bd25fd | 923 | p->addr = address; |
c1bd25fd DJ |
924 | } |
925 | } | |
926 | } | |
927 | ||
c906108c SS |
928 | /* If mourn is being called in all the right places, this could be say |
929 | `gdb internal error' (since generic_mourn calls | |
930 | breakpoint_init_inferior). */ | |
931 | ||
932 | static int | |
3db08215 MM |
933 | ignore (struct target_ops *ops, struct gdbarch *gdbarch, |
934 | struct bp_target_info *bp_tgt) | |
c906108c SS |
935 | { |
936 | return 0; | |
937 | } | |
938 | ||
c35b1492 PA |
939 | static int |
940 | exec_has_memory (struct target_ops *ops) | |
941 | { | |
942 | /* We can provide memory if we have any file/target sections to read | |
943 | from. */ | |
944 | return (current_target_sections->sections | |
945 | != current_target_sections->sections_end); | |
946 | } | |
947 | ||
fc6691b2 | 948 | static char *exec_make_note_section (struct target_ops *self, bfd *, int *); |
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 | } |
be4d1333 MS |
1016 | |
1017 | static char * | |
fc6691b2 | 1018 | exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 | 1019 | { |
8a3fe4f8 | 1020 | error (_("Can't create a corefile")); |
be4d1333 | 1021 | } |