Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
b811d2c2 | 3 | Copyright (C) 1988-2020 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" | |
d55e5aa6 | 22 | #include "inferior.h" |
4de283e4 TT |
23 | #include "target.h" |
24 | #include "gdbcmd.h" | |
c906108c | 25 | #include "language.h" |
4de283e4 TT |
26 | #include "filenames.h" |
27 | #include "symfile.h" | |
c906108c | 28 | #include "objfiles.h" |
4de283e4 TT |
29 | #include "completer.h" |
30 | #include "value.h" | |
31 | #include "exec.h" | |
76727919 | 32 | #include "observable.h" |
4de283e4 TT |
33 | #include "arch-utils.h" |
34 | #include "gdbthread.h" | |
6c95b8df | 35 | #include "progspace.h" |
53af73bf | 36 | #include "progspace-and-thread.h" |
4de283e4 TT |
37 | #include "gdb_bfd.h" |
38 | #include "gcore.h" | |
39 | #include "source.h" | |
40 | ||
41 | #include <fcntl.h> | |
e0eac551 | 42 | #include "readline/tilde.h" |
4de283e4 TT |
43 | #include "gdbcore.h" |
44 | ||
45 | #include <ctype.h> | |
46 | #include <sys/stat.h> | |
a9a5a3d1 | 47 | #include "solist.h" |
4de283e4 | 48 | #include <algorithm> |
268a13a5 | 49 | #include "gdbsupport/pathstuff.h" |
c906108c | 50 | |
1d8b34a7 | 51 | void (*deprecated_file_changed_hook) (const char *); |
c906108c | 52 | |
d9f719f1 PA |
53 | static const target_info exec_target_info = { |
54 | "exec", | |
55 | N_("Local exec file"), | |
56 | N_("Use an executable file as a target.\n\ | |
57 | Specify the filename of the executable file.") | |
58 | }; | |
59 | ||
c906108c SS |
60 | /* The target vector for executable files. */ |
61 | ||
f6ac5f3d PA |
62 | struct exec_target final : public target_ops |
63 | { | |
d9f719f1 PA |
64 | const target_info &info () const override |
65 | { return exec_target_info; } | |
f6ac5f3d | 66 | |
66b4deae PA |
67 | strata stratum () const override { return file_stratum; } |
68 | ||
f6ac5f3d PA |
69 | void close () override; |
70 | enum target_xfer_status xfer_partial (enum target_object object, | |
71 | const char *annex, | |
72 | gdb_byte *readbuf, | |
73 | const gdb_byte *writebuf, | |
74 | ULONGEST offset, ULONGEST len, | |
75 | ULONGEST *xfered_len) override; | |
76 | struct target_section_table *get_section_table () override; | |
77 | void files_info () override; | |
78 | ||
57810aa7 | 79 | bool has_memory () override; |
f6ac5f3d PA |
80 | char *make_corefile_notes (bfd *, int *) override; |
81 | int find_memory_regions (find_memory_region_ftype func, void *data) override; | |
82 | }; | |
83 | ||
84 | static exec_target exec_ops; | |
c906108c | 85 | |
c906108c SS |
86 | /* Whether to open exec and core files read-only or read-write. */ |
87 | ||
491144b5 | 88 | bool write_files = false; |
920d2a44 AC |
89 | static void |
90 | show_write_files (struct ui_file *file, int from_tty, | |
91 | struct cmd_list_element *c, const char *value) | |
92 | { | |
93 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
94 | value); | |
95 | } | |
96 | ||
c906108c | 97 | |
d9f719f1 PA |
98 | static void |
99 | exec_target_open (const char *args, int from_tty) | |
1adeb98a FN |
100 | { |
101 | target_preopen (from_tty); | |
102 | exec_file_attach (args, from_tty); | |
103 | } | |
104 | ||
07b82ea5 PA |
105 | /* Close and clear exec_bfd. If we end up with no target sections to |
106 | read memory from, this unpushes the exec_ops target. */ | |
107 | ||
6c95b8df PA |
108 | void |
109 | exec_close (void) | |
07b82ea5 PA |
110 | { |
111 | if (exec_bfd) | |
112 | { | |
113 | bfd *abfd = exec_bfd; | |
07b82ea5 | 114 | |
cbb099e8 | 115 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
116 | |
117 | /* Removing target sections may close the exec_ops target. | |
118 | Clear exec_bfd before doing so to prevent recursion. */ | |
119 | exec_bfd = NULL; | |
120 | exec_bfd_mtime = 0; | |
121 | ||
046ac79f | 122 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
123 | |
124 | xfree (exec_filename); | |
125 | exec_filename = NULL; | |
07b82ea5 PA |
126 | } |
127 | } | |
128 | ||
6c95b8df PA |
129 | /* This is the target_close implementation. Clears all target |
130 | sections and closes all executable bfds from all program spaces. */ | |
131 | ||
f6ac5f3d PA |
132 | void |
133 | exec_target::close () | |
c906108c | 134 | { |
ab16fce8 | 135 | struct program_space *ss; |
5ed8105e | 136 | scoped_restore_current_program_space restore_pspace; |
6c95b8df | 137 | |
ab16fce8 | 138 | ALL_PSPACES (ss) |
5ed8105e PA |
139 | { |
140 | set_current_program_space (ss); | |
141 | clear_section_table (current_target_sections); | |
142 | exec_close (); | |
143 | } | |
c906108c SS |
144 | } |
145 | ||
f6ac5f3d | 146 | /* See gdbcore.h. */ |
a10de604 GB |
147 | |
148 | void | |
ecf45d2c SL |
149 | try_open_exec_file (const char *exec_file_host, struct inferior *inf, |
150 | symfile_add_flags add_flags) | |
a10de604 | 151 | { |
cc06b668 | 152 | struct gdb_exception prev_err; |
a10de604 | 153 | |
57d1de9c LM |
154 | /* exec_file_attach and symbol_file_add_main may throw an error if the file |
155 | cannot be opened either locally or remotely. | |
156 | ||
157 | This happens for example, when the file is first found in the local | |
158 | sysroot (above), and then disappears (a TOCTOU race), or when it doesn't | |
159 | exist in the target filesystem, or when the file does exist, but | |
160 | is not readable. | |
88178e82 | 161 | |
57d1de9c LM |
162 | Even without a symbol file, the remote-based debugging session should |
163 | continue normally instead of ending abruptly. Hence we catch thrown | |
164 | errors/exceptions in the following code. */ | |
a70b8144 | 165 | try |
57d1de9c | 166 | { |
ecf45d2c SL |
167 | /* We must do this step even if exec_file_host is NULL, so that |
168 | exec_file_attach will clear state. */ | |
169 | exec_file_attach (exec_file_host, add_flags & SYMFILE_VERBOSE); | |
57d1de9c | 170 | } |
94aeb44b | 171 | catch (gdb_exception_error &err) |
57d1de9c LM |
172 | { |
173 | if (err.message != NULL) | |
3d6e9d23 | 174 | warning ("%s", err.what ()); |
57d1de9c | 175 | |
94aeb44b | 176 | prev_err = std::move (err); |
57d1de9c | 177 | } |
57d1de9c | 178 | |
ecf45d2c | 179 | if (exec_file_host != NULL) |
57d1de9c | 180 | { |
a70b8144 | 181 | try |
ecf45d2c SL |
182 | { |
183 | symbol_file_add_main (exec_file_host, add_flags); | |
184 | } | |
230d2906 | 185 | catch (const gdb_exception_error &err) |
ecf45d2c SL |
186 | { |
187 | if (!exception_print_same (prev_err, err)) | |
3d6e9d23 | 188 | warning ("%s", err.what ()); |
ecf45d2c | 189 | } |
57d1de9c | 190 | } |
ecf45d2c SL |
191 | } |
192 | ||
193 | /* See gdbcore.h. */ | |
194 | ||
195 | void | |
196 | exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty) | |
197 | { | |
797bc1cb | 198 | char *exec_file_target; |
ecf45d2c SL |
199 | symfile_add_flags add_flags = 0; |
200 | ||
201 | /* Do nothing if we already have an executable filename. */ | |
202 | if (get_exec_file (0) != NULL) | |
203 | return; | |
204 | ||
205 | /* Try to determine a filename from the process itself. */ | |
206 | exec_file_target = target_pid_to_exec_file (pid); | |
207 | if (exec_file_target == NULL) | |
57d1de9c | 208 | { |
ecf45d2c SL |
209 | warning (_("No executable has been specified and target does not " |
210 | "support\n" | |
211 | "determining executable automatically. " | |
212 | "Try using the \"file\" command.")); | |
213 | return; | |
57d1de9c | 214 | } |
88178e82 | 215 | |
797bc1cb TT |
216 | gdb::unique_xmalloc_ptr<char> exec_file_host |
217 | = exec_file_find (exec_file_target, NULL); | |
ecf45d2c SL |
218 | |
219 | if (defer_bp_reset) | |
220 | add_flags |= SYMFILE_DEFER_BP_RESET; | |
221 | ||
222 | if (from_tty) | |
223 | add_flags |= SYMFILE_VERBOSE; | |
224 | ||
225 | /* Attempt to open the exec file. */ | |
797bc1cb | 226 | try_open_exec_file (exec_file_host.get (), current_inferior (), add_flags); |
a10de604 GB |
227 | } |
228 | ||
907083d1 | 229 | /* Set FILENAME as the new exec file. |
c906108c | 230 | |
c5aa993b JM |
231 | This function is intended to be behave essentially the same |
232 | as exec_file_command, except that the latter will detect when | |
233 | a target is being debugged, and will ask the user whether it | |
234 | should be shut down first. (If the answer is "no", then the | |
235 | new file is ignored.) | |
c906108c | 236 | |
c5aa993b JM |
237 | This file is used by exec_file_command, to do the work of opening |
238 | and processing the exec file after any prompting has happened. | |
c906108c | 239 | |
c5aa993b JM |
240 | And, it is used by child_attach, when the attach command was |
241 | given a pid but not a exec pathname, and the attach command could | |
242 | figure out the pathname from the pid. (In this case, we shouldn't | |
243 | ask the user whether the current target should be shut down -- | |
907083d1 | 244 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
245 | |
246 | void | |
5f08566b | 247 | exec_file_attach (const char *filename, int from_tty) |
c906108c | 248 | { |
9b333ba3 TT |
249 | /* First, acquire a reference to the current exec_bfd. We release |
250 | this at the end of the function; but acquiring it now lets the | |
251 | BFD cache return it if this call refers to the same file. */ | |
1831a9f9 | 252 | gdb_bfd_ref_ptr exec_bfd_holder = gdb_bfd_ref_ptr::new_reference (exec_bfd); |
192b62ce | 253 | |
c906108c | 254 | /* Remove any previous exec file. */ |
6c95b8df | 255 | exec_close (); |
c906108c SS |
256 | |
257 | /* Now open and digest the file the user requested, if any. */ | |
258 | ||
1adeb98a FN |
259 | if (!filename) |
260 | { | |
261 | if (from_tty) | |
a3f17187 | 262 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
263 | |
264 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
265 | } |
266 | else | |
c906108c | 267 | { |
64c0b5de | 268 | int load_via_target = 0; |
14278e1f | 269 | const char *scratch_pathname, *canonical_pathname; |
c906108c | 270 | int scratch_chan; |
07b82ea5 | 271 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 272 | char **matching; |
c5aa993b | 273 | |
64c0b5de GB |
274 | if (is_target_filename (filename)) |
275 | { | |
276 | if (target_filesystem_is_local ()) | |
277 | filename += strlen (TARGET_SYSROOT_PREFIX); | |
278 | else | |
279 | load_via_target = 1; | |
280 | } | |
281 | ||
14278e1f | 282 | gdb::unique_xmalloc_ptr<char> canonical_storage, scratch_storage; |
64c0b5de | 283 | if (load_via_target) |
c5aa993b | 284 | { |
64c0b5de GB |
285 | /* gdb_bfd_fopen does not support "target:" filenames. */ |
286 | if (write_files) | |
287 | warning (_("writing into executable files is " | |
288 | "not supported for %s sysroots"), | |
289 | TARGET_SYSROOT_PREFIX); | |
290 | ||
14278e1f | 291 | scratch_pathname = filename; |
64c0b5de | 292 | scratch_chan = -1; |
64c0b5de | 293 | canonical_pathname = scratch_pathname; |
c5aa993b | 294 | } |
64c0b5de GB |
295 | else |
296 | { | |
297 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
298 | filename, write_files ? | |
299 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, | |
e0cc99a6 | 300 | &scratch_storage); |
64c0b5de GB |
301 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
302 | if (scratch_chan < 0) | |
303 | { | |
0ae1c716 | 304 | char *exename = (char *) alloca (strlen (filename) + 5); |
64c0b5de GB |
305 | |
306 | strcat (strcpy (exename, filename), ".exe"); | |
307 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
308 | exename, write_files ? | |
309 | O_RDWR | O_BINARY | |
310 | : O_RDONLY | O_BINARY, | |
e0cc99a6 | 311 | &scratch_storage); |
64c0b5de | 312 | } |
c906108c | 313 | #endif |
64c0b5de GB |
314 | if (scratch_chan < 0) |
315 | perror_with_name (filename); | |
a4453b7e | 316 | |
e0cc99a6 | 317 | scratch_pathname = scratch_storage.get (); |
a4453b7e | 318 | |
64c0b5de GB |
319 | /* gdb_bfd_open (and its variants) prefers canonicalized |
320 | pathname for better BFD caching. */ | |
14278e1f TT |
321 | canonical_storage = gdb_realpath (scratch_pathname); |
322 | canonical_pathname = canonical_storage.get (); | |
64c0b5de | 323 | } |
1f0c4988 | 324 | |
192b62ce | 325 | gdb_bfd_ref_ptr temp; |
64c0b5de | 326 | if (write_files && !load_via_target) |
192b62ce TT |
327 | temp = gdb_bfd_fopen (canonical_pathname, gnutarget, |
328 | FOPEN_RUB, scratch_chan); | |
1c00ec6b | 329 | else |
192b62ce TT |
330 | temp = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
331 | exec_bfd = temp.release (); | |
c906108c SS |
332 | |
333 | if (!exec_bfd) | |
9fe4a216 | 334 | { |
d5131498 | 335 | error (_("\"%s\": could not open as an executable file: %s."), |
9fe4a216 TT |
336 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
337 | } | |
c906108c | 338 | |
64c0b5de GB |
339 | /* gdb_realpath_keepfile resolves symlinks on the local |
340 | filesystem and so cannot be used for "target:" files. */ | |
1f0c4988 | 341 | gdb_assert (exec_filename == NULL); |
64c0b5de GB |
342 | if (load_via_target) |
343 | exec_filename = xstrdup (bfd_get_filename (exec_bfd)); | |
344 | else | |
4971c9a7 | 345 | exec_filename = gdb_realpath_keepfile (scratch_pathname).release (); |
1f0c4988 | 346 | |
d18b8b7a | 347 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
348 | { |
349 | /* Make sure to close exec_bfd, or else "run" might try to use | |
350 | it. */ | |
6c95b8df | 351 | exec_close (); |
8a3fe4f8 | 352 | error (_("\"%s\": not in executable format: %s"), |
d18b8b7a | 353 | scratch_pathname, |
803c08d0 | 354 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); |
c906108c SS |
355 | } |
356 | ||
07b82ea5 | 357 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
358 | { |
359 | /* Make sure to close exec_bfd, or else "run" might try to use | |
360 | it. */ | |
6c95b8df | 361 | exec_close (); |
8a3fe4f8 | 362 | error (_("\"%s\": can't find the file sections: %s"), |
c906108c SS |
363 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
364 | } | |
365 | ||
c04ea773 DJ |
366 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
367 | ||
c906108c SS |
368 | validate_files (); |
369 | ||
370 | set_gdbarch_from_file (exec_bfd); | |
371 | ||
07b82ea5 | 372 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
373 | list of sections. This possibly pushes the exec_ops |
374 | target. */ | |
ed9eebaf | 375 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 376 | xfree (sections); |
c906108c SS |
377 | |
378 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
379 | if (deprecated_exec_file_display_hook) |
380 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 381 | } |
9b333ba3 | 382 | |
ce7d4522 | 383 | bfd_cache_close_all (); |
76727919 | 384 | gdb::observers::executable_changed.notify (); |
c906108c SS |
385 | } |
386 | ||
387 | /* Process the first arg in ARGS as the new exec file. | |
388 | ||
c5aa993b JM |
389 | Note that we have to explicitly ignore additional args, since we can |
390 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
391 | which can take multiple args. |
392 | ||
0963b4bd | 393 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 394 | |
1adeb98a | 395 | static void |
1d8b34a7 | 396 | exec_file_command (const char *args, int from_tty) |
c906108c | 397 | { |
4c42eaff DJ |
398 | if (from_tty && target_has_execution |
399 | && !query (_("A program is being debugged already.\n" | |
400 | "Are you sure you want to change the file? "))) | |
401 | error (_("File not changed.")); | |
1adeb98a FN |
402 | |
403 | if (args) | |
404 | { | |
405 | /* Scan through the args and pick up the first non option arg | |
406 | as the filename. */ | |
407 | ||
773a1edc TT |
408 | gdb_argv built_argv (args); |
409 | char **argv = built_argv.get (); | |
1adeb98a FN |
410 | |
411 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
412 | {; | |
413 | } | |
414 | if (*argv == NULL) | |
8a3fe4f8 | 415 | error (_("No executable file name was specified")); |
1adeb98a | 416 | |
773a1edc TT |
417 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (*argv)); |
418 | exec_file_attach (filename.get (), from_tty); | |
1adeb98a FN |
419 | } |
420 | else | |
421 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
422 | } |
423 | ||
0963b4bd | 424 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
425 | What a novelty. Why did GDB go through four major releases before this |
426 | command was added? */ | |
427 | ||
428 | static void | |
1d8b34a7 | 429 | file_command (const char *arg, int from_tty) |
c906108c SS |
430 | { |
431 | /* FIXME, if we lose on reading the symbol file, we should revert | |
432 | the exec file, but that's rough. */ | |
433 | exec_file_command (arg, from_tty); | |
434 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
435 | if (deprecated_file_changed_hook) |
436 | deprecated_file_changed_hook (arg); | |
c906108c | 437 | } |
c906108c | 438 | \f |
c5aa993b | 439 | |
0963b4bd | 440 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
441 | table_pp_char is a char * to get it through bfd_map_over_sections; |
442 | we cast it back to its proper type. */ | |
443 | ||
444 | static void | |
7be0c536 AC |
445 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
446 | void *table_pp_char) | |
c906108c | 447 | { |
0542c86d | 448 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
449 | flagword aflag; |
450 | ||
2b2848e2 DE |
451 | gdb_assert (abfd == asect->owner); |
452 | ||
0f5d55d8 JB |
453 | /* Check the section flags, but do not discard zero-length sections, since |
454 | some symbols may still be attached to this section. For instance, we | |
455 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
456 | section to which a symbol named "_end" was attached. The address | |
457 | of this symbol still needs to be relocated. */ | |
fd361982 | 458 | aflag = bfd_section_flags (asect); |
c906108c SS |
459 | if (!(aflag & SEC_ALLOC)) |
460 | return; | |
0f5d55d8 | 461 | |
046ac79f | 462 | (*table_pp)->owner = NULL; |
c906108c | 463 | (*table_pp)->the_bfd_section = asect; |
fd361982 AM |
464 | (*table_pp)->addr = bfd_section_vma (asect); |
465 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (asect); | |
c906108c SS |
466 | (*table_pp)++; |
467 | } | |
468 | ||
a5b1fd27 DE |
469 | /* See exec.h. */ |
470 | ||
471 | void | |
472 | clear_section_table (struct target_section_table *table) | |
473 | { | |
474 | xfree (table->sections); | |
475 | table->sections = table->sections_end = NULL; | |
476 | } | |
477 | ||
478 | /* Resize section table TABLE by ADJUSTMENT. | |
479 | ADJUSTMENT may be negative, in which case the caller must have already | |
480 | removed the sections being deleted. | |
481 | Returns the old size. */ | |
482 | ||
483 | static int | |
484 | resize_section_table (struct target_section_table *table, int adjustment) | |
07b82ea5 | 485 | { |
07b82ea5 PA |
486 | int old_count; |
487 | int new_count; | |
488 | ||
07b82ea5 PA |
489 | old_count = table->sections_end - table->sections; |
490 | ||
a5b1fd27 | 491 | new_count = adjustment + old_count; |
07b82ea5 PA |
492 | |
493 | if (new_count) | |
494 | { | |
224c3ddb SM |
495 | table->sections = XRESIZEVEC (struct target_section, table->sections, |
496 | new_count); | |
07b82ea5 PA |
497 | table->sections_end = table->sections + new_count; |
498 | } | |
499 | else | |
a5b1fd27 | 500 | clear_section_table (table); |
07b82ea5 PA |
501 | |
502 | return old_count; | |
503 | } | |
504 | ||
c906108c SS |
505 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
506 | Returns 0 if OK, 1 on error. */ | |
507 | ||
508 | int | |
0542c86d PA |
509 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
510 | struct target_section **end) | |
c906108c SS |
511 | { |
512 | unsigned count; | |
513 | ||
514 | count = bfd_count_sections (some_bfd); | |
515 | if (*start) | |
b8c9b27d | 516 | xfree (* start); |
8d749320 | 517 | *start = XNEWVEC (struct target_section, count); |
c906108c | 518 | *end = *start; |
c5aa993b | 519 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
c906108c | 520 | if (*end > *start + count) |
3e43a32a MS |
521 | internal_error (__FILE__, __LINE__, |
522 | _("failed internal consistency check")); | |
c906108c SS |
523 | /* We could realloc the table, but it probably loses for most files. */ |
524 | return 0; | |
525 | } | |
07b82ea5 PA |
526 | |
527 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
528 | current set of target sections. */ | |
529 | ||
530 | void | |
046ac79f | 531 | add_target_sections (void *owner, |
ed9eebaf | 532 | struct target_section *sections, |
07b82ea5 PA |
533 | struct target_section *sections_end) |
534 | { | |
535 | int count; | |
536 | struct target_section_table *table = current_target_sections; | |
537 | ||
538 | count = sections_end - sections; | |
539 | ||
540 | if (count > 0) | |
541 | { | |
542 | int space = resize_section_table (table, count); | |
ed9eebaf | 543 | int i; |
d7f9d729 | 544 | |
ed9eebaf TT |
545 | for (i = 0; i < count; ++i) |
546 | { | |
547 | table->sections[space + i] = sections[i]; | |
046ac79f | 548 | table->sections[space + i].owner = owner; |
ed9eebaf | 549 | } |
07b82ea5 | 550 | |
53af73bf | 551 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f PA |
552 | program_space *curr_pspace = current_program_space; |
553 | ||
07b82ea5 | 554 | /* If these are the first file sections we can provide memory |
5b6d1e4f PA |
555 | from, push the file_stratum target. Must do this in all |
556 | inferiors sharing the program space. */ | |
557 | for (inferior *inf : all_inferiors ()) | |
558 | { | |
559 | if (inf->pspace != curr_pspace) | |
560 | continue; | |
561 | ||
562 | if (inf->target_is_pushed (&exec_ops)) | |
563 | continue; | |
564 | ||
565 | switch_to_inferior_no_thread (inf); | |
566 | push_target (&exec_ops); | |
567 | } | |
07b82ea5 PA |
568 | } |
569 | } | |
570 | ||
76ad5e1e NB |
571 | /* Add the sections of OBJFILE to the current set of target sections. */ |
572 | ||
573 | void | |
574 | add_target_sections_of_objfile (struct objfile *objfile) | |
575 | { | |
576 | struct target_section_table *table = current_target_sections; | |
577 | struct obj_section *osect; | |
578 | int space; | |
579 | unsigned count = 0; | |
580 | struct target_section *ts; | |
581 | ||
582 | if (objfile == NULL) | |
583 | return; | |
584 | ||
585 | /* Compute the number of sections to add. */ | |
586 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
587 | { | |
fd361982 | 588 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
589 | continue; |
590 | count++; | |
591 | } | |
592 | ||
593 | if (count == 0) | |
594 | return; | |
595 | ||
596 | space = resize_section_table (table, count); | |
597 | ||
598 | ts = table->sections + space; | |
599 | ||
600 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
601 | { | |
fd361982 | 602 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
603 | continue; |
604 | ||
605 | gdb_assert (ts < table->sections + space + count); | |
606 | ||
607 | ts->addr = obj_section_addr (osect); | |
608 | ts->endaddr = obj_section_endaddr (osect); | |
609 | ts->the_bfd_section = osect->the_bfd_section; | |
610 | ts->owner = (void *) objfile; | |
611 | ||
612 | ts++; | |
613 | } | |
614 | } | |
615 | ||
046ac79f JK |
616 | /* Remove all target sections owned by OWNER. |
617 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
618 | |
619 | void | |
046ac79f | 620 | remove_target_sections (void *owner) |
07b82ea5 PA |
621 | { |
622 | struct target_section *src, *dest; | |
07b82ea5 PA |
623 | struct target_section_table *table = current_target_sections; |
624 | ||
046ac79f JK |
625 | gdb_assert (owner != NULL); |
626 | ||
07b82ea5 PA |
627 | dest = table->sections; |
628 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 629 | if (src->owner != owner) |
07b82ea5 PA |
630 | { |
631 | /* Keep this section. */ | |
632 | if (dest < src) | |
633 | *dest = *src; | |
634 | dest++; | |
635 | } | |
636 | ||
637 | /* If we've dropped any sections, resize the section table. */ | |
638 | if (dest < src) | |
639 | { | |
640 | int old_count; | |
641 | ||
642 | old_count = resize_section_table (table, dest - src); | |
643 | ||
644 | /* If we don't have any more sections to read memory from, | |
5b6d1e4f PA |
645 | remove the file_stratum target from the stack of each |
646 | inferior sharing the program space. */ | |
07b82ea5 | 647 | if (old_count + (dest - src) == 0) |
6c95b8df | 648 | { |
53af73bf | 649 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f PA |
650 | program_space *curr_pspace = current_program_space; |
651 | ||
652 | for (inferior *inf : all_inferiors ()) | |
653 | { | |
654 | if (inf->pspace != curr_pspace) | |
655 | continue; | |
6c95b8df | 656 | |
5b6d1e4f PA |
657 | if (inf->pspace->target_sections.sections |
658 | != inf->pspace->target_sections.sections_end) | |
659 | continue; | |
6c95b8df | 660 | |
5b6d1e4f PA |
661 | switch_to_inferior_no_thread (inf); |
662 | unpush_target (&exec_ops); | |
663 | } | |
6c95b8df | 664 | } |
07b82ea5 PA |
665 | } |
666 | } | |
667 | ||
5b6d1e4f PA |
668 | /* See exec.h. */ |
669 | ||
670 | void | |
671 | exec_on_vfork () | |
672 | { | |
673 | if (current_program_space->target_sections.sections | |
674 | != current_program_space->target_sections.sections_end) | |
675 | push_target (&exec_ops); | |
676 | } | |
677 | ||
c906108c | 678 | \f |
348f8c02 | 679 | |
1ca49d37 YQ |
680 | enum target_xfer_status |
681 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
682 | ULONGEST len, ULONGEST *xfered_len) | |
683 | { | |
684 | /* It's unduly pedantic to refuse to look at the executable for | |
685 | read-only pieces; so do the equivalent of readonly regions aka | |
686 | QTro packet. */ | |
687 | if (exec_bfd != NULL) | |
688 | { | |
689 | asection *s; | |
690 | bfd_size_type size; | |
691 | bfd_vma vma; | |
692 | ||
693 | for (s = exec_bfd->sections; s; s = s->next) | |
694 | { | |
695 | if ((s->flags & SEC_LOAD) == 0 | |
696 | || (s->flags & SEC_READONLY) == 0) | |
697 | continue; | |
698 | ||
699 | vma = s->vma; | |
fd361982 | 700 | size = bfd_section_size (s); |
1ca49d37 YQ |
701 | if (vma <= offset && offset < (vma + size)) |
702 | { | |
703 | ULONGEST amt; | |
704 | ||
705 | amt = (vma + size) - offset; | |
706 | if (amt > len) | |
707 | amt = len; | |
708 | ||
709 | amt = bfd_get_section_contents (exec_bfd, s, | |
710 | readbuf, offset - vma, amt); | |
711 | ||
712 | if (amt == 0) | |
713 | return TARGET_XFER_EOF; | |
714 | else | |
715 | { | |
716 | *xfered_len = amt; | |
717 | return TARGET_XFER_OK; | |
718 | } | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | /* Indicate failure to find the requested memory block. */ | |
724 | return TARGET_XFER_E_IO; | |
725 | } | |
726 | ||
a79b1bc6 | 727 | /* Return all read-only memory ranges found in the target section |
5a2eb0ef | 728 | table defined by SECTIONS and SECTIONS_END, starting at (and |
a79b1bc6 | 729 | intersected with) MEMADDR for LEN bytes. */ |
5a2eb0ef | 730 | |
a79b1bc6 SM |
731 | static std::vector<mem_range> |
732 | section_table_available_memory (CORE_ADDR memaddr, ULONGEST len, | |
e6ca34fc PA |
733 | struct target_section *sections, |
734 | struct target_section *sections_end) | |
735 | { | |
a79b1bc6 | 736 | std::vector<mem_range> memory; |
e6ca34fc | 737 | |
a79b1bc6 | 738 | for (target_section *p = sections; p < sections_end; p++) |
e6ca34fc | 739 | { |
fd361982 | 740 | if ((bfd_section_flags (p->the_bfd_section) & SEC_READONLY) == 0) |
e6ca34fc PA |
741 | continue; |
742 | ||
743 | /* Copy the meta-data, adjusted. */ | |
744 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
745 | { | |
746 | ULONGEST lo1, hi1, lo2, hi2; | |
e6ca34fc PA |
747 | |
748 | lo1 = memaddr; | |
749 | hi1 = memaddr + len; | |
750 | ||
751 | lo2 = p->addr; | |
752 | hi2 = p->endaddr; | |
753 | ||
a79b1bc6 SM |
754 | CORE_ADDR start = std::max (lo1, lo2); |
755 | int length = std::min (hi1, hi2) - start; | |
e6ca34fc | 756 | |
a79b1bc6 | 757 | memory.emplace_back (start, length); |
e6ca34fc PA |
758 | } |
759 | } | |
760 | ||
761 | return memory; | |
762 | } | |
763 | ||
1ee79381 YQ |
764 | enum target_xfer_status |
765 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
766 | ULONGEST len, ULONGEST *xfered_len) | |
767 | { | |
a79b1bc6 SM |
768 | target_section_table *table = target_get_section_table (&exec_ops); |
769 | std::vector<mem_range> available_memory | |
770 | = section_table_available_memory (offset, len, | |
771 | table->sections, table->sections_end); | |
1ee79381 | 772 | |
a79b1bc6 | 773 | normalize_mem_ranges (&available_memory); |
1ee79381 | 774 | |
a79b1bc6 | 775 | for (const mem_range &r : available_memory) |
1ee79381 | 776 | { |
a79b1bc6 | 777 | if (mem_ranges_overlap (r.start, r.length, offset, len)) |
1ee79381 YQ |
778 | { |
779 | CORE_ADDR end; | |
780 | enum target_xfer_status status; | |
781 | ||
782 | /* Get the intersection window. */ | |
a79b1bc6 | 783 | end = std::min<CORE_ADDR> (offset + len, r.start + r.length); |
1ee79381 YQ |
784 | |
785 | gdb_assert (end - offset <= len); | |
786 | ||
a79b1bc6 | 787 | if (offset >= r.start) |
1ee79381 YQ |
788 | status = exec_read_partial_read_only (readbuf, offset, |
789 | end - offset, | |
790 | xfered_len); | |
791 | else | |
792 | { | |
a79b1bc6 | 793 | *xfered_len = r.start - offset; |
bc113b4e | 794 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 | 795 | } |
1ee79381 YQ |
796 | return status; |
797 | } | |
798 | } | |
1ee79381 YQ |
799 | |
800 | *xfered_len = len; | |
bc113b4e | 801 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
802 | } |
803 | ||
9b409511 | 804 | enum target_xfer_status |
07b82ea5 | 805 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 806 | ULONGEST offset, ULONGEST len, |
9b409511 | 807 | ULONGEST *xfered_len, |
07b82ea5 PA |
808 | struct target_section *sections, |
809 | struct target_section *sections_end, | |
810 | const char *section_name) | |
c906108c | 811 | { |
020cc13c | 812 | int res; |
0542c86d | 813 | struct target_section *p; |
07b82ea5 PA |
814 | ULONGEST memaddr = offset; |
815 | ULONGEST memend = memaddr + len; | |
c906108c | 816 | |
b55e14c7 | 817 | if (len == 0) |
3e43a32a MS |
818 | internal_error (__FILE__, __LINE__, |
819 | _("failed internal consistency check")); | |
c906108c | 820 | |
348f8c02 | 821 | for (p = sections; p < sections_end; p++) |
c906108c | 822 | { |
2b2848e2 DE |
823 | struct bfd_section *asect = p->the_bfd_section; |
824 | bfd *abfd = asect->owner; | |
825 | ||
826 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 827 | continue; /* not the section we need. */ |
c906108c | 828 | if (memaddr >= p->addr) |
3db26b01 JB |
829 | { |
830 | if (memend <= p->endaddr) | |
831 | { | |
832 | /* Entire transfer is within this section. */ | |
07b82ea5 | 833 | if (writebuf) |
2b2848e2 | 834 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 835 | writebuf, memaddr - p->addr, |
85302095 AC |
836 | len); |
837 | else | |
2b2848e2 | 838 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 839 | readbuf, memaddr - p->addr, |
85302095 | 840 | len); |
9b409511 YQ |
841 | |
842 | if (res != 0) | |
843 | { | |
844 | *xfered_len = len; | |
845 | return TARGET_XFER_OK; | |
846 | } | |
847 | else | |
848 | return TARGET_XFER_EOF; | |
3db26b01 JB |
849 | } |
850 | else if (memaddr >= p->endaddr) | |
851 | { | |
852 | /* This section ends before the transfer starts. */ | |
853 | continue; | |
854 | } | |
855 | else | |
856 | { | |
857 | /* This section overlaps the transfer. Just do half. */ | |
858 | len = p->endaddr - memaddr; | |
07b82ea5 | 859 | if (writebuf) |
2b2848e2 | 860 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 861 | writebuf, memaddr - p->addr, |
85302095 AC |
862 | len); |
863 | else | |
2b2848e2 | 864 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 865 | readbuf, memaddr - p->addr, |
85302095 | 866 | len); |
9b409511 YQ |
867 | if (res != 0) |
868 | { | |
869 | *xfered_len = len; | |
870 | return TARGET_XFER_OK; | |
871 | } | |
872 | else | |
873 | return TARGET_XFER_EOF; | |
3db26b01 JB |
874 | } |
875 | } | |
c906108c SS |
876 | } |
877 | ||
9b409511 | 878 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 879 | } |
348f8c02 | 880 | |
f6ac5f3d PA |
881 | struct target_section_table * |
882 | exec_target::get_section_table () | |
348f8c02 | 883 | { |
07b82ea5 | 884 | return current_target_sections; |
348f8c02 PA |
885 | } |
886 | ||
f6ac5f3d PA |
887 | enum target_xfer_status |
888 | exec_target::xfer_partial (enum target_object object, | |
889 | const char *annex, gdb_byte *readbuf, | |
890 | const gdb_byte *writebuf, | |
891 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
348f8c02 | 892 | { |
f6ac5f3d | 893 | struct target_section_table *table = get_section_table (); |
07b82ea5 PA |
894 | |
895 | if (object == TARGET_OBJECT_MEMORY) | |
896 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 897 | offset, len, xfered_len, |
07b82ea5 PA |
898 | table->sections, |
899 | table->sections_end, | |
900 | NULL); | |
901 | else | |
2ed4b548 | 902 | return TARGET_XFER_E_IO; |
348f8c02 | 903 | } |
c906108c | 904 | \f |
c5aa993b | 905 | |
c906108c | 906 | void |
07b82ea5 | 907 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 908 | { |
5af949e3 | 909 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 910 | struct target_section *p; |
17a912b6 | 911 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 912 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 913 | |
c5aa993b | 914 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
c906108c | 915 | wrap_here (" "); |
a3f17187 | 916 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 917 | if (abfd == exec_bfd) |
51bee8e9 | 918 | { |
3e43a32a MS |
919 | /* gcc-3.4 does not like the initialization in |
920 | <p == t->sections_end>. */ | |
d904de5b | 921 | bfd_vma displacement = 0; |
2f1bdd26 | 922 | bfd_vma entry_point; |
51bee8e9 JK |
923 | |
924 | for (p = t->sections; p < t->sections_end; p++) | |
925 | { | |
2b2848e2 | 926 | struct bfd_section *psect = p->the_bfd_section; |
51bee8e9 | 927 | |
fd361982 | 928 | if ((bfd_section_flags (psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
929 | != (SEC_ALLOC | SEC_LOAD)) |
930 | continue; | |
931 | ||
fd361982 AM |
932 | if (bfd_section_vma (psect) <= abfd->start_address |
933 | && abfd->start_address < (bfd_section_vma (psect) | |
934 | + bfd_section_size (psect))) | |
51bee8e9 | 935 | { |
fd361982 | 936 | displacement = p->addr - bfd_section_vma (psect); |
51bee8e9 JK |
937 | break; |
938 | } | |
939 | } | |
940 | if (p == t->sections_end) | |
b37520b6 | 941 | warning (_("Cannot find section for the entry point of %s."), |
d904de5b | 942 | bfd_get_filename (abfd)); |
51bee8e9 | 943 | |
2f1bdd26 MGD |
944 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
945 | bfd_get_start_address (abfd) | |
946 | + displacement); | |
51bee8e9 | 947 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 948 | paddress (gdbarch, entry_point)); |
51bee8e9 | 949 | } |
07b82ea5 | 950 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 951 | { |
2b2848e2 DE |
952 | struct bfd_section *psect = p->the_bfd_section; |
953 | bfd *pbfd = psect->owner; | |
954 | ||
bb599908 PH |
955 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
956 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
957 | |
958 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
959 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
960 | since most output will then be much wider than necessary. It | |
961 | may make sense to test the size of the file and choose the | |
962 | format string accordingly. */ | |
a3f17187 | 963 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
964 | if (info_verbose) |
965 | printf_filtered (" @ %s", | |
2b2848e2 | 966 | hex_string_custom (psect->filepos, 8)); |
fd361982 | 967 | printf_filtered (" is %s", bfd_section_name (psect)); |
2b2848e2 DE |
968 | if (pbfd != abfd) |
969 | printf_filtered (" in %s", bfd_get_filename (pbfd)); | |
c906108c SS |
970 | printf_filtered ("\n"); |
971 | } | |
972 | } | |
973 | ||
f6ac5f3d PA |
974 | void |
975 | exec_target::files_info () | |
c906108c | 976 | { |
57008375 JK |
977 | if (exec_bfd) |
978 | print_section_info (current_target_sections, exec_bfd); | |
979 | else | |
980 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
981 | } |
982 | ||
983 | static void | |
0b39b52e | 984 | set_section_command (const char *args, int from_tty) |
c906108c | 985 | { |
0542c86d | 986 | struct target_section *p; |
0b39b52e | 987 | const char *secname; |
c906108c SS |
988 | unsigned seclen; |
989 | unsigned long secaddr; | |
990 | char secprint[100]; | |
991 | long offset; | |
07b82ea5 | 992 | struct target_section_table *table; |
c906108c SS |
993 | |
994 | if (args == 0) | |
8a3fe4f8 | 995 | error (_("Must specify section name and its virtual address")); |
c906108c | 996 | |
0963b4bd | 997 | /* Parse out section name. */ |
c5aa993b | 998 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
999 | seclen = args - secname; |
1000 | ||
0963b4bd | 1001 | /* Parse out new virtual address. */ |
c906108c SS |
1002 | secaddr = parse_and_eval_address (args); |
1003 | ||
07b82ea5 PA |
1004 | table = current_target_sections; |
1005 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 1006 | { |
fd361982 AM |
1007 | if (!strncmp (secname, bfd_section_name (p->the_bfd_section), seclen) |
1008 | && bfd_section_name (p->the_bfd_section)[seclen] == '\0') | |
c5aa993b JM |
1009 | { |
1010 | offset = secaddr - p->addr; | |
1011 | p->addr += offset; | |
1012 | p->endaddr += offset; | |
1013 | if (from_tty) | |
f6ac5f3d | 1014 | exec_ops.files_info (); |
c5aa993b JM |
1015 | return; |
1016 | } | |
c906108c | 1017 | } |
c906108c SS |
1018 | if (seclen >= sizeof (secprint)) |
1019 | seclen = sizeof (secprint) - 1; | |
1020 | strncpy (secprint, secname, seclen); | |
1021 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 1022 | error (_("Section %s not found"), secprint); |
c906108c SS |
1023 | } |
1024 | ||
30510692 DJ |
1025 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
1026 | it to ADDRESS. */ | |
c1bd25fd DJ |
1027 | |
1028 | void | |
1029 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
1030 | { | |
0542c86d | 1031 | struct target_section *p; |
07b82ea5 | 1032 | struct target_section_table *table; |
c1bd25fd | 1033 | |
07b82ea5 PA |
1034 | table = current_target_sections; |
1035 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 1036 | { |
2b2848e2 | 1037 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 1038 | && index == p->the_bfd_section->index) |
c1bd25fd | 1039 | { |
30510692 | 1040 | p->endaddr += address - p->addr; |
c1bd25fd | 1041 | p->addr = address; |
c1bd25fd DJ |
1042 | } |
1043 | } | |
1044 | } | |
1045 | ||
57810aa7 | 1046 | bool |
f6ac5f3d | 1047 | exec_target::has_memory () |
c35b1492 PA |
1048 | { |
1049 | /* We can provide memory if we have any file/target sections to read | |
1050 | from. */ | |
1051 | return (current_target_sections->sections | |
1052 | != current_target_sections->sections_end); | |
1053 | } | |
1054 | ||
f6ac5f3d PA |
1055 | char * |
1056 | exec_target::make_corefile_notes (bfd *obfd, int *note_size) | |
83814951 TT |
1057 | { |
1058 | error (_("Can't create a corefile")); | |
1059 | } | |
be4d1333 | 1060 | |
f6ac5f3d PA |
1061 | int |
1062 | exec_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
c906108c | 1063 | { |
f6ac5f3d | 1064 | return objfile_find_memory_regions (this, func, data); |
c906108c SS |
1065 | } |
1066 | ||
6c265988 | 1067 | void _initialize_exec (); |
c906108c | 1068 | void |
6c265988 | 1069 | _initialize_exec () |
c906108c SS |
1070 | { |
1071 | struct cmd_list_element *c; | |
1072 | ||
c906108c SS |
1073 | if (!dbx_commands) |
1074 | { | |
1a966eab AC |
1075 | c = add_cmd ("file", class_files, file_command, _("\ |
1076 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
1077 | It is read for its symbols, for getting the contents of pure memory,\n\ |
1078 | and it is the program executed when you use the `run' command.\n\ | |
1079 | If FILE cannot be found as specified, your execution directory path\n\ | |
1080 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 1081 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 1082 | set_cmd_completer (c, filename_completer); |
c906108c SS |
1083 | } |
1084 | ||
1a966eab AC |
1085 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
1086 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
1087 | If FILE cannot be found as specified, your execution directory path\n\ |
1088 | is searched for a command of that name.\n\ | |
1a966eab | 1089 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 1090 | set_cmd_completer (c, filename_completer); |
c906108c | 1091 | |
1bedd215 AC |
1092 | add_com ("section", class_files, set_section_command, _("\ |
1093 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1094 | This can be used if the exec file does not contain section addresses,\n\ |
1095 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1096 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1097 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1098 | |
5bf193a2 AC |
1099 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1100 | Set writing into executable and core files."), _("\ | |
1101 | Show writing into executable and core files."), NULL, | |
1102 | NULL, | |
920d2a44 | 1103 | show_write_files, |
5bf193a2 | 1104 | &setlist, &showlist); |
c5aa993b | 1105 | |
d9f719f1 | 1106 | add_target (exec_target_info, exec_target_open, filename_completer); |
c906108c | 1107 | } |