Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
28e7fd62 | 3 | Copyright (C) 1988-2013 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" |
c906108c | 37 | |
c906108c | 38 | #include <fcntl.h> |
dbda9972 | 39 | #include "readline/readline.h" |
c906108c SS |
40 | #include "gdb_string.h" |
41 | ||
42 | #include "gdbcore.h" | |
43 | ||
44 | #include <ctype.h> | |
45 | #include "gdb_stat.h" | |
c906108c | 46 | |
9a4105ab | 47 | void (*deprecated_file_changed_hook) (char *); |
c906108c SS |
48 | |
49 | /* Prototypes for local functions */ | |
50 | ||
a14ed312 | 51 | static void file_command (char *, int); |
c906108c | 52 | |
a14ed312 | 53 | static void set_section_command (char *, int); |
c906108c | 54 | |
a14ed312 | 55 | static void exec_files_info (struct target_ops *); |
c906108c | 56 | |
a14ed312 | 57 | static void init_exec_ops (void); |
c906108c | 58 | |
a14ed312 | 59 | void _initialize_exec (void); |
c906108c | 60 | |
c906108c SS |
61 | /* The target vector for executable files. */ |
62 | ||
63 | struct target_ops exec_ops; | |
64 | ||
6c95b8df PA |
65 | /* True if the exec target is pushed on the stack. */ |
66 | static int using_exec_ops; | |
07b82ea5 | 67 | |
c906108c SS |
68 | /* Whether to open exec and core files read-only or read-write. */ |
69 | ||
70 | int write_files = 0; | |
920d2a44 AC |
71 | static void |
72 | show_write_files (struct ui_file *file, int from_tty, | |
73 | struct cmd_list_element *c, const char *value) | |
74 | { | |
75 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
76 | value); | |
77 | } | |
78 | ||
c906108c | 79 | |
4c42eaff | 80 | static void |
1adeb98a FN |
81 | exec_open (char *args, int from_tty) |
82 | { | |
83 | target_preopen (from_tty); | |
84 | exec_file_attach (args, from_tty); | |
85 | } | |
86 | ||
07b82ea5 PA |
87 | /* Close and clear exec_bfd. If we end up with no target sections to |
88 | read memory from, this unpushes the exec_ops target. */ | |
89 | ||
6c95b8df PA |
90 | void |
91 | exec_close (void) | |
07b82ea5 PA |
92 | { |
93 | if (exec_bfd) | |
94 | { | |
95 | bfd *abfd = exec_bfd; | |
07b82ea5 | 96 | |
cbb099e8 | 97 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
98 | |
99 | /* Removing target sections may close the exec_ops target. | |
100 | Clear exec_bfd before doing so to prevent recursion. */ | |
101 | exec_bfd = NULL; | |
102 | exec_bfd_mtime = 0; | |
103 | ||
ed9eebaf | 104 | remove_target_sections (&exec_bfd, abfd); |
07b82ea5 PA |
105 | } |
106 | } | |
107 | ||
6c95b8df PA |
108 | /* This is the target_close implementation. Clears all target |
109 | sections and closes all executable bfds from all program spaces. */ | |
110 | ||
c906108c | 111 | static void |
460014f5 | 112 | exec_close_1 (void) |
c906108c | 113 | { |
6c95b8df PA |
114 | using_exec_ops = 0; |
115 | ||
6c95b8df PA |
116 | { |
117 | struct program_space *ss; | |
118 | struct cleanup *old_chain; | |
c906108c | 119 | |
6c95b8df PA |
120 | old_chain = save_current_program_space (); |
121 | ALL_PSPACES (ss) | |
122 | { | |
123 | set_current_program_space (ss); | |
124 | ||
125 | /* Delete all target sections. */ | |
126 | resize_section_table | |
127 | (current_target_sections, | |
128 | -resize_section_table (current_target_sections, 0)); | |
129 | ||
130 | exec_close (); | |
131 | } | |
132 | ||
133 | do_cleanups (old_chain); | |
134 | } | |
c906108c SS |
135 | } |
136 | ||
1adeb98a FN |
137 | void |
138 | exec_file_clear (int from_tty) | |
139 | { | |
140 | /* Remove exec file. */ | |
6c95b8df | 141 | exec_close (); |
1adeb98a FN |
142 | |
143 | if (from_tty) | |
a3f17187 | 144 | printf_unfiltered (_("No executable file now.\n")); |
1adeb98a FN |
145 | } |
146 | ||
907083d1 | 147 | /* Set FILENAME as the new exec file. |
c906108c | 148 | |
c5aa993b JM |
149 | This function is intended to be behave essentially the same |
150 | as exec_file_command, except that the latter will detect when | |
151 | a target is being debugged, and will ask the user whether it | |
152 | should be shut down first. (If the answer is "no", then the | |
153 | new file is ignored.) | |
c906108c | 154 | |
c5aa993b JM |
155 | This file is used by exec_file_command, to do the work of opening |
156 | and processing the exec file after any prompting has happened. | |
c906108c | 157 | |
c5aa993b JM |
158 | And, it is used by child_attach, when the attach command was |
159 | given a pid but not a exec pathname, and the attach command could | |
160 | figure out the pathname from the pid. (In this case, we shouldn't | |
161 | ask the user whether the current target should be shut down -- | |
907083d1 | 162 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
163 | |
164 | void | |
1adeb98a | 165 | exec_file_attach (char *filename, int from_tty) |
c906108c | 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 | { |
f7545552 | 181 | struct cleanup *cleanups; |
c906108c SS |
182 | char *scratch_pathname; |
183 | int scratch_chan; | |
07b82ea5 | 184 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 185 | char **matching; |
c5aa993b | 186 | |
014d698b | 187 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
fbdebf46 | 188 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
c906108c | 189 | &scratch_pathname); |
cfc3008e | 190 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
c906108c | 191 | if (scratch_chan < 0) |
c5aa993b JM |
192 | { |
193 | char *exename = alloca (strlen (filename) + 5); | |
d7f9d729 | 194 | |
c5aa993b | 195 | strcat (strcpy (exename, filename), ".exe"); |
014d698b | 196 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
fbdebf46 | 197 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, |
014d698b | 198 | &scratch_pathname); |
c5aa993b | 199 | } |
c906108c | 200 | #endif |
17d6efc4 JB |
201 | if (scratch_chan < 0) |
202 | perror_with_name (filename); | |
a4453b7e TT |
203 | |
204 | cleanups = make_cleanup (xfree, scratch_pathname); | |
205 | ||
1c00ec6b TT |
206 | if (write_files) |
207 | exec_bfd = gdb_bfd_fopen (scratch_pathname, gnutarget, | |
208 | FOPEN_RUB, scratch_chan); | |
209 | else | |
210 | exec_bfd = gdb_bfd_open (scratch_pathname, gnutarget, scratch_chan); | |
c906108c SS |
211 | |
212 | if (!exec_bfd) | |
9fe4a216 | 213 | { |
9fe4a216 TT |
214 | error (_("\"%s\": could not open as an executable file: %s"), |
215 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
216 | } | |
c906108c | 217 | |
d18b8b7a | 218 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
219 | { |
220 | /* Make sure to close exec_bfd, or else "run" might try to use | |
221 | it. */ | |
6c95b8df | 222 | exec_close (); |
8a3fe4f8 | 223 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a HZ |
224 | scratch_pathname, |
225 | gdb_bfd_errmsg (bfd_get_error (), matching)); | |
c906108c SS |
226 | } |
227 | ||
07b82ea5 | 228 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
229 | { |
230 | /* Make sure to close exec_bfd, or else "run" might try to use | |
231 | it. */ | |
6c95b8df | 232 | exec_close (); |
8a3fe4f8 | 233 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
234 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
235 | } | |
236 | ||
c04ea773 DJ |
237 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
238 | ||
c906108c SS |
239 | validate_files (); |
240 | ||
241 | set_gdbarch_from_file (exec_bfd); | |
242 | ||
07b82ea5 | 243 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
244 | list of sections. This possibly pushes the exec_ops |
245 | target. */ | |
ed9eebaf | 246 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 247 | xfree (sections); |
c906108c SS |
248 | |
249 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
250 | if (deprecated_exec_file_display_hook) |
251 | (*deprecated_exec_file_display_hook) (filename); | |
f7545552 TT |
252 | |
253 | do_cleanups (cleanups); | |
c906108c | 254 | } |
ce7d4522 | 255 | bfd_cache_close_all (); |
781b42b0 | 256 | observer_notify_executable_changed (); |
c906108c SS |
257 | } |
258 | ||
259 | /* Process the first arg in ARGS as the new exec file. | |
260 | ||
c5aa993b JM |
261 | Note that we have to explicitly ignore additional args, since we can |
262 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
263 | which can take multiple args. |
264 | ||
0963b4bd | 265 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 266 | |
1adeb98a | 267 | static void |
fba45db2 | 268 | exec_file_command (char *args, int from_tty) |
c906108c | 269 | { |
1adeb98a FN |
270 | char **argv; |
271 | char *filename; | |
4c42eaff DJ |
272 | |
273 | if (from_tty && target_has_execution | |
274 | && !query (_("A program is being debugged already.\n" | |
275 | "Are you sure you want to change the file? "))) | |
276 | error (_("File not changed.")); | |
1adeb98a FN |
277 | |
278 | if (args) | |
279 | { | |
f7545552 TT |
280 | struct cleanup *cleanups; |
281 | ||
1adeb98a FN |
282 | /* Scan through the args and pick up the first non option arg |
283 | as the filename. */ | |
284 | ||
d1a41061 | 285 | argv = gdb_buildargv (args); |
f7545552 | 286 | cleanups = make_cleanup_freeargv (argv); |
1adeb98a FN |
287 | |
288 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
289 | {; | |
290 | } | |
291 | if (*argv == NULL) | |
8a3fe4f8 | 292 | error (_("No executable file name was specified")); |
1adeb98a FN |
293 | |
294 | filename = tilde_expand (*argv); | |
295 | make_cleanup (xfree, filename); | |
296 | exec_file_attach (filename, from_tty); | |
f7545552 TT |
297 | |
298 | do_cleanups (cleanups); | |
1adeb98a FN |
299 | } |
300 | else | |
301 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
302 | } |
303 | ||
0963b4bd | 304 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
305 | What a novelty. Why did GDB go through four major releases before this |
306 | command was added? */ | |
307 | ||
308 | static void | |
fba45db2 | 309 | file_command (char *arg, int from_tty) |
c906108c SS |
310 | { |
311 | /* FIXME, if we lose on reading the symbol file, we should revert | |
312 | the exec file, but that's rough. */ | |
313 | exec_file_command (arg, from_tty); | |
314 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
315 | if (deprecated_file_changed_hook) |
316 | deprecated_file_changed_hook (arg); | |
c906108c | 317 | } |
c906108c | 318 | \f |
c5aa993b | 319 | |
0963b4bd | 320 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
321 | table_pp_char is a char * to get it through bfd_map_over_sections; |
322 | we cast it back to its proper type. */ | |
323 | ||
324 | static void | |
7be0c536 AC |
325 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
326 | void *table_pp_char) | |
c906108c | 327 | { |
0542c86d | 328 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
329 | flagword aflag; |
330 | ||
0f5d55d8 JB |
331 | /* Check the section flags, but do not discard zero-length sections, since |
332 | some symbols may still be attached to this section. For instance, we | |
333 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
334 | section to which a symbol named "_end" was attached. The address | |
335 | of this symbol still needs to be relocated. */ | |
c906108c SS |
336 | aflag = bfd_get_section_flags (abfd, asect); |
337 | if (!(aflag & SEC_ALLOC)) | |
338 | return; | |
0f5d55d8 | 339 | |
ed9eebaf | 340 | (*table_pp)->key = NULL; |
c906108c SS |
341 | (*table_pp)->bfd = abfd; |
342 | (*table_pp)->the_bfd_section = asect; | |
343 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
344 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
345 | (*table_pp)++; | |
346 | } | |
347 | ||
07b82ea5 PA |
348 | int |
349 | resize_section_table (struct target_section_table *table, int num_added) | |
350 | { | |
07b82ea5 PA |
351 | int old_count; |
352 | int new_count; | |
353 | ||
07b82ea5 PA |
354 | old_count = table->sections_end - table->sections; |
355 | ||
356 | new_count = num_added + old_count; | |
357 | ||
358 | if (new_count) | |
359 | { | |
360 | table->sections = xrealloc (table->sections, | |
361 | sizeof (struct target_section) * new_count); | |
362 | table->sections_end = table->sections + new_count; | |
363 | } | |
364 | else | |
365 | { | |
366 | xfree (table->sections); | |
367 | table->sections = table->sections_end = NULL; | |
368 | } | |
369 | ||
370 | return old_count; | |
371 | } | |
372 | ||
c906108c SS |
373 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
374 | Returns 0 if OK, 1 on error. */ | |
375 | ||
376 | int | |
0542c86d PA |
377 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
378 | struct target_section **end) | |
c906108c SS |
379 | { |
380 | unsigned count; | |
381 | ||
382 | count = bfd_count_sections (some_bfd); | |
383 | if (*start) | |
b8c9b27d | 384 | xfree (* start); |
0542c86d | 385 | *start = (struct target_section *) xmalloc (count * sizeof (**start)); |
c906108c | 386 | *end = *start; |
c5aa993b | 387 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 388 | if (*end > *start + count) |
3e43a32a MS |
389 | internal_error (__FILE__, __LINE__, |
390 | _("failed internal consistency check")); | |
c906108c SS |
391 | /* We could realloc the table, but it probably loses for most files. */ |
392 | return 0; | |
393 | } | |
07b82ea5 PA |
394 | |
395 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
396 | current set of target sections. */ | |
397 | ||
398 | void | |
ed9eebaf TT |
399 | add_target_sections (void *key, |
400 | struct target_section *sections, | |
07b82ea5 PA |
401 | struct target_section *sections_end) |
402 | { | |
403 | int count; | |
404 | struct target_section_table *table = current_target_sections; | |
405 | ||
406 | count = sections_end - sections; | |
407 | ||
408 | if (count > 0) | |
409 | { | |
410 | int space = resize_section_table (table, count); | |
ed9eebaf | 411 | int i; |
d7f9d729 | 412 | |
ed9eebaf TT |
413 | for (i = 0; i < count; ++i) |
414 | { | |
415 | table->sections[space + i] = sections[i]; | |
416 | table->sections[space + i].key = key; | |
417 | } | |
07b82ea5 PA |
418 | |
419 | /* If these are the first file sections we can provide memory | |
420 | from, push the file_stratum target. */ | |
6c95b8df PA |
421 | if (!using_exec_ops) |
422 | { | |
423 | using_exec_ops = 1; | |
424 | push_target (&exec_ops); | |
425 | } | |
07b82ea5 PA |
426 | } |
427 | } | |
428 | ||
429 | /* Remove all target sections taken from ABFD. */ | |
430 | ||
431 | void | |
ed9eebaf | 432 | remove_target_sections (void *key, bfd *abfd) |
07b82ea5 PA |
433 | { |
434 | struct target_section *src, *dest; | |
07b82ea5 PA |
435 | struct target_section_table *table = current_target_sections; |
436 | ||
437 | dest = table->sections; | |
438 | for (src = table->sections; src < table->sections_end; src++) | |
ed9eebaf | 439 | if (src->key != key || src->bfd != abfd) |
07b82ea5 PA |
440 | { |
441 | /* Keep this section. */ | |
442 | if (dest < src) | |
443 | *dest = *src; | |
444 | dest++; | |
445 | } | |
446 | ||
447 | /* If we've dropped any sections, resize the section table. */ | |
448 | if (dest < src) | |
449 | { | |
450 | int old_count; | |
451 | ||
452 | old_count = resize_section_table (table, dest - src); | |
453 | ||
454 | /* If we don't have any more sections to read memory from, | |
455 | remove the file_stratum target from the stack. */ | |
456 | if (old_count + (dest - src) == 0) | |
6c95b8df PA |
457 | { |
458 | struct program_space *pspace; | |
459 | ||
460 | ALL_PSPACES (pspace) | |
461 | if (pspace->target_sections.sections | |
462 | != pspace->target_sections.sections_end) | |
463 | return; | |
464 | ||
465 | unpush_target (&exec_ops); | |
466 | } | |
07b82ea5 PA |
467 | } |
468 | } | |
469 | ||
c906108c | 470 | \f |
348f8c02 | 471 | |
e6ca34fc PA |
472 | VEC(mem_range_s) * |
473 | section_table_available_memory (VEC(mem_range_s) *memory, | |
424447ee | 474 | CORE_ADDR memaddr, ULONGEST len, |
e6ca34fc PA |
475 | struct target_section *sections, |
476 | struct target_section *sections_end) | |
477 | { | |
478 | struct target_section *p; | |
e6ca34fc PA |
479 | |
480 | for (p = sections; p < sections_end; p++) | |
481 | { | |
482 | if ((bfd_get_section_flags (p->bfd, p->the_bfd_section) | |
483 | & SEC_READONLY) == 0) | |
484 | continue; | |
485 | ||
486 | /* Copy the meta-data, adjusted. */ | |
487 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
488 | { | |
489 | ULONGEST lo1, hi1, lo2, hi2; | |
490 | struct mem_range *r; | |
491 | ||
492 | lo1 = memaddr; | |
493 | hi1 = memaddr + len; | |
494 | ||
495 | lo2 = p->addr; | |
496 | hi2 = p->endaddr; | |
497 | ||
498 | r = VEC_safe_push (mem_range_s, memory, NULL); | |
499 | ||
500 | r->start = max (lo1, lo2); | |
501 | r->length = min (hi1, hi2) - r->start; | |
502 | } | |
503 | } | |
504 | ||
505 | return memory; | |
506 | } | |
507 | ||
07b82ea5 PA |
508 | int |
509 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, | |
510 | ULONGEST offset, LONGEST len, | |
511 | struct target_section *sections, | |
512 | struct target_section *sections_end, | |
513 | const char *section_name) | |
c906108c | 514 | { |
020cc13c | 515 | int res; |
0542c86d | 516 | struct target_section *p; |
07b82ea5 PA |
517 | ULONGEST memaddr = offset; |
518 | ULONGEST memend = memaddr + len; | |
c906108c SS |
519 | |
520 | if (len <= 0) | |
3e43a32a MS |
521 | internal_error (__FILE__, __LINE__, |
522 | _("failed internal consistency check")); | |
c906108c | 523 | |
348f8c02 | 524 | for (p = sections; p < sections_end; p++) |
c906108c | 525 | { |
348f8c02 | 526 | if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0) |
0963b4bd | 527 | continue; /* not the section we need. */ |
c906108c | 528 | if (memaddr >= p->addr) |
3db26b01 JB |
529 | { |
530 | if (memend <= p->endaddr) | |
531 | { | |
532 | /* Entire transfer is within this section. */ | |
07b82ea5 | 533 | if (writebuf) |
85302095 | 534 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 535 | writebuf, memaddr - p->addr, |
85302095 AC |
536 | len); |
537 | else | |
538 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 539 | readbuf, memaddr - p->addr, |
85302095 | 540 | len); |
3db26b01 JB |
541 | return (res != 0) ? len : 0; |
542 | } | |
543 | else if (memaddr >= p->endaddr) | |
544 | { | |
545 | /* This section ends before the transfer starts. */ | |
546 | continue; | |
547 | } | |
548 | else | |
549 | { | |
550 | /* This section overlaps the transfer. Just do half. */ | |
551 | len = p->endaddr - memaddr; | |
07b82ea5 | 552 | if (writebuf) |
85302095 | 553 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
07b82ea5 | 554 | writebuf, memaddr - p->addr, |
85302095 AC |
555 | len); |
556 | else | |
557 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, | |
07b82ea5 | 558 | readbuf, memaddr - p->addr, |
85302095 | 559 | len); |
3db26b01 JB |
560 | return (res != 0) ? len : 0; |
561 | } | |
562 | } | |
c906108c SS |
563 | } |
564 | ||
0963b4bd | 565 | return 0; /* We can't help. */ |
c906108c | 566 | } |
348f8c02 | 567 | |
70221824 | 568 | static struct target_section_table * |
07b82ea5 | 569 | exec_get_section_table (struct target_ops *ops) |
348f8c02 | 570 | { |
07b82ea5 | 571 | return current_target_sections; |
348f8c02 PA |
572 | } |
573 | ||
07b82ea5 PA |
574 | static LONGEST |
575 | exec_xfer_partial (struct target_ops *ops, enum target_object object, | |
576 | const char *annex, gdb_byte *readbuf, | |
577 | const gdb_byte *writebuf, | |
578 | ULONGEST offset, LONGEST len) | |
348f8c02 | 579 | { |
07b82ea5 PA |
580 | struct target_section_table *table = target_get_section_table (ops); |
581 | ||
582 | if (object == TARGET_OBJECT_MEMORY) | |
583 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
584 | offset, len, | |
585 | table->sections, | |
586 | table->sections_end, | |
587 | NULL); | |
588 | else | |
589 | return -1; | |
348f8c02 | 590 | } |
c906108c | 591 | \f |
c5aa993b | 592 | |
c906108c | 593 | void |
07b82ea5 | 594 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 595 | { |
5af949e3 | 596 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 597 | struct target_section *p; |
17a912b6 | 598 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 599 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 600 | |
c5aa993b | 601 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 602 | wrap_here (" "); |
a3f17187 | 603 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 604 | if (abfd == exec_bfd) |
51bee8e9 | 605 | { |
3e43a32a MS |
606 | /* gcc-3.4 does not like the initialization in |
607 | <p == t->sections_end>. */ | |
d904de5b | 608 | bfd_vma displacement = 0; |
2f1bdd26 | 609 | bfd_vma entry_point; |
51bee8e9 JK |
610 | |
611 | for (p = t->sections; p < t->sections_end; p++) | |
612 | { | |
613 | asection *asect = p->the_bfd_section; | |
614 | ||
615 | if ((bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD)) | |
616 | != (SEC_ALLOC | SEC_LOAD)) | |
617 | continue; | |
618 | ||
619 | if (bfd_get_section_vma (abfd, asect) <= abfd->start_address | |
620 | && abfd->start_address < (bfd_get_section_vma (abfd, asect) | |
621 | + bfd_get_section_size (asect))) | |
622 | { | |
623 | displacement = p->addr - bfd_get_section_vma (abfd, asect); | |
624 | break; | |
625 | } | |
626 | } | |
627 | if (p == t->sections_end) | |
b37520b6 | 628 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 629 | bfd_get_filename (abfd)); |
51bee8e9 | 630 | |
2f1bdd26 MGD |
631 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
632 | bfd_get_start_address (abfd) | |
633 | + displacement); | |
51bee8e9 | 634 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 635 | paddress (gdbarch, entry_point)); |
51bee8e9 | 636 | } |
07b82ea5 | 637 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 638 | { |
bb599908 PH |
639 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
640 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
641 | |
642 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
643 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
644 | since most output will then be much wider than necessary. It | |
645 | may make sense to test the size of the file and choose the | |
646 | format string accordingly. */ | |
a3f17187 | 647 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
648 | if (info_verbose) |
649 | printf_filtered (" @ %s", | |
bb599908 | 650 | hex_string_custom (p->the_bfd_section->filepos, 8)); |
3e43a32a MS |
651 | printf_filtered (" is %s", bfd_section_name (p->bfd, |
652 | p->the_bfd_section)); | |
c906108c | 653 | if (p->bfd != abfd) |
a3f17187 | 654 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
c906108c SS |
655 | printf_filtered ("\n"); |
656 | } | |
657 | } | |
658 | ||
659 | static void | |
fba45db2 | 660 | exec_files_info (struct target_ops *t) |
c906108c | 661 | { |
57008375 JK |
662 | if (exec_bfd) |
663 | print_section_info (current_target_sections, exec_bfd); | |
664 | else | |
665 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
666 | } |
667 | ||
668 | static void | |
fba45db2 | 669 | set_section_command (char *args, int from_tty) |
c906108c | 670 | { |
0542c86d | 671 | struct target_section *p; |
c906108c SS |
672 | char *secname; |
673 | unsigned seclen; | |
674 | unsigned long secaddr; | |
675 | char secprint[100]; | |
676 | long offset; | |
07b82ea5 | 677 | struct target_section_table *table; |
c906108c SS |
678 | |
679 | if (args == 0) | |
8a3fe4f8 | 680 | error (_("Must specify section name and its virtual address")); |
c906108c | 681 | |
0963b4bd | 682 | /* Parse out section name. */ |
c5aa993b | 683 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
684 | seclen = args - secname; |
685 | ||
0963b4bd | 686 | /* Parse out new virtual address. */ |
c906108c SS |
687 | secaddr = parse_and_eval_address (args); |
688 | ||
07b82ea5 PA |
689 | table = current_target_sections; |
690 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 691 | { |
57008375 | 692 | if (!strncmp (secname, bfd_section_name (p->bfd, |
3e43a32a | 693 | p->the_bfd_section), seclen) |
57008375 | 694 | && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0') |
c5aa993b JM |
695 | { |
696 | offset = secaddr - p->addr; | |
697 | p->addr += offset; | |
698 | p->endaddr += offset; | |
699 | if (from_tty) | |
700 | exec_files_info (&exec_ops); | |
701 | return; | |
702 | } | |
c906108c | 703 | } |
c906108c SS |
704 | if (seclen >= sizeof (secprint)) |
705 | seclen = sizeof (secprint) - 1; | |
706 | strncpy (secprint, secname, seclen); | |
707 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 708 | error (_("Section %s not found"), secprint); |
c906108c SS |
709 | } |
710 | ||
30510692 DJ |
711 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
712 | it to ADDRESS. */ | |
c1bd25fd DJ |
713 | |
714 | void | |
715 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
716 | { | |
0542c86d | 717 | struct target_section *p; |
07b82ea5 | 718 | struct target_section_table *table; |
c1bd25fd | 719 | |
07b82ea5 PA |
720 | table = current_target_sections; |
721 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 722 | { |
0ba1096a | 723 | if (filename_cmp (filename, p->bfd->filename) == 0 |
30510692 | 724 | && index == p->the_bfd_section->index) |
c1bd25fd | 725 | { |
30510692 | 726 | p->endaddr += address - p->addr; |
c1bd25fd | 727 | p->addr = address; |
c1bd25fd DJ |
728 | } |
729 | } | |
730 | } | |
731 | ||
c906108c SS |
732 | /* If mourn is being called in all the right places, this could be say |
733 | `gdb internal error' (since generic_mourn calls | |
734 | breakpoint_init_inferior). */ | |
735 | ||
736 | static int | |
a6d9a66e | 737 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
738 | { |
739 | return 0; | |
740 | } | |
741 | ||
c35b1492 PA |
742 | static int |
743 | exec_has_memory (struct target_ops *ops) | |
744 | { | |
745 | /* We can provide memory if we have any file/target sections to read | |
746 | from. */ | |
747 | return (current_target_sections->sections | |
748 | != current_target_sections->sections_end); | |
749 | } | |
750 | ||
0963b4bd | 751 | /* Find mapped memory. */ |
be4d1333 MS |
752 | |
753 | extern void | |
b8edc417 | 754 | exec_set_find_memory_regions (int (*func) (find_memory_region_ftype, void *)) |
be4d1333 MS |
755 | { |
756 | exec_ops.to_find_memory_regions = func; | |
757 | } | |
758 | ||
759 | static char *exec_make_note_section (bfd *, int *); | |
760 | ||
c906108c SS |
761 | /* Fill in the exec file target vector. Very few entries need to be |
762 | defined. */ | |
763 | ||
be4d1333 | 764 | static void |
fba45db2 | 765 | init_exec_ops (void) |
c906108c SS |
766 | { |
767 | exec_ops.to_shortname = "exec"; | |
768 | exec_ops.to_longname = "Local exec file"; | |
769 | exec_ops.to_doc = "Use an executable file as a target.\n\ | |
770 | Specify the filename of the executable file."; | |
1adeb98a | 771 | exec_ops.to_open = exec_open; |
6c95b8df | 772 | exec_ops.to_close = exec_close_1; |
c906108c | 773 | exec_ops.to_attach = find_default_attach; |
07b82ea5 PA |
774 | exec_ops.to_xfer_partial = exec_xfer_partial; |
775 | exec_ops.to_get_section_table = exec_get_section_table; | |
c906108c SS |
776 | exec_ops.to_files_info = exec_files_info; |
777 | exec_ops.to_insert_breakpoint = ignore; | |
778 | exec_ops.to_remove_breakpoint = ignore; | |
779 | exec_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 780 | exec_ops.to_stratum = file_stratum; |
c35b1492 | 781 | exec_ops.to_has_memory = exec_has_memory; |
be4d1333 | 782 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
c5aa993b | 783 | exec_ops.to_magic = OPS_MAGIC; |
c906108c SS |
784 | } |
785 | ||
786 | void | |
fba45db2 | 787 | _initialize_exec (void) |
c906108c SS |
788 | { |
789 | struct cmd_list_element *c; | |
790 | ||
791 | init_exec_ops (); | |
792 | ||
793 | if (!dbx_commands) | |
794 | { | |
1a966eab AC |
795 | c = add_cmd ("file", class_files, file_command, _("\ |
796 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
797 | It is read for its symbols, for getting the contents of pure memory,\n\ |
798 | and it is the program executed when you use the `run' command.\n\ | |
799 | If FILE cannot be found as specified, your execution directory path\n\ | |
800 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 801 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 802 | set_cmd_completer (c, filename_completer); |
c906108c SS |
803 | } |
804 | ||
1a966eab AC |
805 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
806 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
807 | If FILE cannot be found as specified, your execution directory path\n\ |
808 | is searched for a command of that name.\n\ | |
1a966eab | 809 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 810 | set_cmd_completer (c, filename_completer); |
c906108c | 811 | |
1bedd215 AC |
812 | add_com ("section", class_files, set_section_command, _("\ |
813 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
814 | This can be used if the exec file does not contain section addresses,\n\ |
815 | (such as in the a.out format), or when the addresses specified in the\n\ | |
816 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 817 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 818 | |
5bf193a2 AC |
819 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
820 | Set writing into executable and core files."), _("\ | |
821 | Show writing into executable and core files."), NULL, | |
822 | NULL, | |
920d2a44 | 823 | show_write_files, |
5bf193a2 | 824 | &setlist, &showlist); |
c5aa993b | 825 | |
9852c492 | 826 | add_target_with_completer (&exec_ops, filename_completer); |
c906108c | 827 | } |
be4d1333 MS |
828 | |
829 | static char * | |
830 | exec_make_note_section (bfd *obfd, int *note_size) | |
831 | { | |
8a3fe4f8 | 832 | error (_("Can't create a corefile")); |
be4d1333 | 833 | } |