Commit | Line | Data |
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c906108c | 1 | /* Work with executable files, for GDB. |
4646aa9d | 2 | |
3666a048 | 3 | Copyright (C) 1988-2021 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" | |
98c59b52 | 40 | #include "build-id.h" |
4de283e4 TT |
41 | |
42 | #include <fcntl.h> | |
e0eac551 | 43 | #include "readline/tilde.h" |
4de283e4 TT |
44 | #include "gdbcore.h" |
45 | ||
46 | #include <ctype.h> | |
47 | #include <sys/stat.h> | |
a9a5a3d1 | 48 | #include "solist.h" |
4de283e4 | 49 | #include <algorithm> |
268a13a5 | 50 | #include "gdbsupport/pathstuff.h" |
a2fedca9 | 51 | #include "cli/cli-style.h" |
c906108c | 52 | |
1d8b34a7 | 53 | void (*deprecated_file_changed_hook) (const char *); |
c906108c | 54 | |
d9f719f1 PA |
55 | static const target_info exec_target_info = { |
56 | "exec", | |
57 | N_("Local exec file"), | |
58 | N_("Use an executable file as a target.\n\ | |
59 | Specify the filename of the executable file.") | |
60 | }; | |
61 | ||
c906108c SS |
62 | /* The target vector for executable files. */ |
63 | ||
f6ac5f3d PA |
64 | struct exec_target final : public target_ops |
65 | { | |
d9f719f1 PA |
66 | const target_info &info () const override |
67 | { return exec_target_info; } | |
f6ac5f3d | 68 | |
66b4deae PA |
69 | strata stratum () const override { return file_stratum; } |
70 | ||
f6ac5f3d PA |
71 | void close () override; |
72 | enum target_xfer_status xfer_partial (enum target_object object, | |
73 | const char *annex, | |
74 | gdb_byte *readbuf, | |
75 | const gdb_byte *writebuf, | |
76 | ULONGEST offset, ULONGEST len, | |
77 | ULONGEST *xfered_len) override; | |
f6ac5f3d PA |
78 | void files_info () override; |
79 | ||
57810aa7 | 80 | bool has_memory () override; |
24f5300a | 81 | gdb::unique_xmalloc_ptr<char> make_corefile_notes (bfd *, int *) override; |
f6ac5f3d PA |
82 | int find_memory_regions (find_memory_region_ftype func, void *data) override; |
83 | }; | |
84 | ||
85 | static exec_target exec_ops; | |
c906108c | 86 | |
a2fedca9 PW |
87 | /* How to handle a mismatch between the current exec file and the exec |
88 | file determined from target. */ | |
89 | ||
90 | static const char *const exec_file_mismatch_names[] | |
91 | = {"ask", "warn", "off", NULL }; | |
92 | enum exec_file_mismatch_mode | |
93 | { | |
94 | exec_file_mismatch_ask, exec_file_mismatch_warn, exec_file_mismatch_off | |
95 | }; | |
96 | static const char *exec_file_mismatch = exec_file_mismatch_names[0]; | |
97 | static enum exec_file_mismatch_mode exec_file_mismatch_mode | |
98 | = exec_file_mismatch_ask; | |
99 | ||
100 | /* Show command. */ | |
101 | static void | |
102 | show_exec_file_mismatch_command (struct ui_file *file, int from_tty, | |
103 | struct cmd_list_element *c, const char *value) | |
104 | { | |
105 | fprintf_filtered (gdb_stdout, | |
106 | _("exec-file-mismatch handling is currently \"%s\".\n"), | |
107 | exec_file_mismatch_names[exec_file_mismatch_mode]); | |
108 | } | |
109 | ||
110 | /* Set command. Change the setting for range checking. */ | |
111 | static void | |
112 | set_exec_file_mismatch_command (const char *ignore, | |
113 | int from_tty, struct cmd_list_element *c) | |
114 | { | |
115 | for (enum exec_file_mismatch_mode mode = exec_file_mismatch_ask; | |
116 | ; | |
117 | mode = static_cast<enum exec_file_mismatch_mode>(1 + (int) mode)) | |
118 | { | |
119 | if (strcmp (exec_file_mismatch, exec_file_mismatch_names[mode]) == 0) | |
120 | { | |
121 | exec_file_mismatch_mode = mode; | |
122 | return; | |
123 | } | |
124 | if (mode == exec_file_mismatch_off) | |
125 | internal_error (__FILE__, __LINE__, | |
126 | _("Unrecognized exec-file-mismatch setting: \"%s\""), | |
127 | exec_file_mismatch); | |
128 | } | |
129 | } | |
130 | ||
c906108c SS |
131 | /* Whether to open exec and core files read-only or read-write. */ |
132 | ||
491144b5 | 133 | bool write_files = false; |
920d2a44 AC |
134 | static void |
135 | show_write_files (struct ui_file *file, int from_tty, | |
136 | struct cmd_list_element *c, const char *value) | |
137 | { | |
138 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
139 | value); | |
140 | } | |
141 | ||
c906108c | 142 | |
d9f719f1 PA |
143 | static void |
144 | exec_target_open (const char *args, int from_tty) | |
1adeb98a FN |
145 | { |
146 | target_preopen (from_tty); | |
147 | exec_file_attach (args, from_tty); | |
148 | } | |
149 | ||
6c95b8df PA |
150 | /* This is the target_close implementation. Clears all target |
151 | sections and closes all executable bfds from all program spaces. */ | |
152 | ||
f6ac5f3d PA |
153 | void |
154 | exec_target::close () | |
c906108c | 155 | { |
94c93c35 | 156 | for (struct program_space *ss : program_spaces) |
5ed8105e | 157 | { |
02f7d26b | 158 | ss->clear_target_sections (); |
8a4f1402 | 159 | ss->exec_close (); |
5ed8105e | 160 | } |
c906108c SS |
161 | } |
162 | ||
f6ac5f3d | 163 | /* See gdbcore.h. */ |
a10de604 GB |
164 | |
165 | void | |
ecf45d2c SL |
166 | try_open_exec_file (const char *exec_file_host, struct inferior *inf, |
167 | symfile_add_flags add_flags) | |
a10de604 | 168 | { |
cc06b668 | 169 | struct gdb_exception prev_err; |
a10de604 | 170 | |
57d1de9c LM |
171 | /* exec_file_attach and symbol_file_add_main may throw an error if the file |
172 | cannot be opened either locally or remotely. | |
173 | ||
174 | This happens for example, when the file is first found in the local | |
175 | sysroot (above), and then disappears (a TOCTOU race), or when it doesn't | |
176 | exist in the target filesystem, or when the file does exist, but | |
177 | is not readable. | |
88178e82 | 178 | |
57d1de9c LM |
179 | Even without a symbol file, the remote-based debugging session should |
180 | continue normally instead of ending abruptly. Hence we catch thrown | |
181 | errors/exceptions in the following code. */ | |
a70b8144 | 182 | try |
57d1de9c | 183 | { |
ecf45d2c SL |
184 | /* We must do this step even if exec_file_host is NULL, so that |
185 | exec_file_attach will clear state. */ | |
186 | exec_file_attach (exec_file_host, add_flags & SYMFILE_VERBOSE); | |
57d1de9c | 187 | } |
94aeb44b | 188 | catch (gdb_exception_error &err) |
57d1de9c LM |
189 | { |
190 | if (err.message != NULL) | |
3d6e9d23 | 191 | warning ("%s", err.what ()); |
57d1de9c | 192 | |
94aeb44b | 193 | prev_err = std::move (err); |
57d1de9c | 194 | } |
57d1de9c | 195 | |
ecf45d2c | 196 | if (exec_file_host != NULL) |
57d1de9c | 197 | { |
a70b8144 | 198 | try |
ecf45d2c SL |
199 | { |
200 | symbol_file_add_main (exec_file_host, add_flags); | |
201 | } | |
230d2906 | 202 | catch (const gdb_exception_error &err) |
ecf45d2c SL |
203 | { |
204 | if (!exception_print_same (prev_err, err)) | |
3d6e9d23 | 205 | warning ("%s", err.what ()); |
ecf45d2c | 206 | } |
57d1de9c | 207 | } |
ecf45d2c SL |
208 | } |
209 | ||
210 | /* See gdbcore.h. */ | |
211 | ||
a2fedca9 PW |
212 | void |
213 | validate_exec_file (int from_tty) | |
214 | { | |
215 | /* If user asked to ignore the mismatch, do nothing. */ | |
216 | if (exec_file_mismatch_mode == exec_file_mismatch_off) | |
217 | return; | |
218 | ||
219 | const char *current_exec_file = get_exec_file (0); | |
220 | struct inferior *inf = current_inferior (); | |
221 | /* Try to determine a filename from the process itself. */ | |
222 | const char *pid_exec_file = target_pid_to_exec_file (inf->pid); | |
98c59b52 | 223 | bool build_id_mismatch = false; |
a2fedca9 | 224 | |
98c59b52 | 225 | /* If we cannot validate the exec file, return. */ |
a2fedca9 PW |
226 | if (current_exec_file == NULL || pid_exec_file == NULL) |
227 | return; | |
228 | ||
98c59b52 PA |
229 | /* Try validating via build-id, if available. This is the most |
230 | reliable check. */ | |
48e9cc84 PW |
231 | |
232 | /* In case current_exec_file was changed, reopen_exec_file ensures | |
233 | an up to date build_id (will do nothing if the file timestamp | |
234 | did not change). If exec file changed, reopen_exec_file has | |
235 | allocated another file name, so get_exec_file again. */ | |
236 | reopen_exec_file (); | |
237 | current_exec_file = get_exec_file (0); | |
238 | ||
7e10abd1 TT |
239 | const bfd_build_id *exec_file_build_id |
240 | = build_id_bfd_get (current_program_space->exec_bfd ()); | |
98c59b52 PA |
241 | if (exec_file_build_id != nullptr) |
242 | { | |
243 | /* Prepend the target prefix, to force gdb_bfd_open to open the | |
244 | file on the remote file system (if indeed remote). */ | |
245 | std::string target_pid_exec_file | |
246 | = std::string (TARGET_SYSROOT_PREFIX) + pid_exec_file; | |
247 | ||
248 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (target_pid_exec_file.c_str (), | |
249 | gnutarget, -1, false)); | |
250 | if (abfd != nullptr) | |
251 | { | |
252 | const bfd_build_id *target_exec_file_build_id | |
253 | = build_id_bfd_get (abfd.get ()); | |
a2fedca9 | 254 | |
98c59b52 PA |
255 | if (target_exec_file_build_id != nullptr) |
256 | { | |
257 | if (exec_file_build_id->size == target_exec_file_build_id->size | |
258 | && memcmp (exec_file_build_id->data, | |
259 | target_exec_file_build_id->data, | |
260 | exec_file_build_id->size) == 0) | |
261 | { | |
262 | /* Match. */ | |
263 | return; | |
264 | } | |
265 | else | |
266 | build_id_mismatch = true; | |
267 | } | |
268 | } | |
269 | } | |
a2fedca9 | 270 | |
98c59b52 | 271 | if (build_id_mismatch) |
a2fedca9 | 272 | { |
98c59b52 PA |
273 | std::string exec_file_target (pid_exec_file); |
274 | ||
275 | /* In case the exec file is not local, exec_file_target has to point at | |
276 | the target file system. */ | |
277 | if (is_target_filename (current_exec_file) && !target_filesystem_is_local ()) | |
278 | exec_file_target = TARGET_SYSROOT_PREFIX + exec_file_target; | |
279 | ||
a2fedca9 | 280 | warning |
0a278aa7 | 281 | (_("Build ID mismatch between current exec-file %ps\n" |
a2fedca9 PW |
282 | "and automatically determined exec-file %ps\n" |
283 | "exec-file-mismatch handling is currently \"%s\""), | |
284 | styled_string (file_name_style.style (), current_exec_file), | |
285 | styled_string (file_name_style.style (), exec_file_target.c_str ()), | |
286 | exec_file_mismatch_names[exec_file_mismatch_mode]); | |
287 | if (exec_file_mismatch_mode == exec_file_mismatch_ask) | |
288 | { | |
289 | symfile_add_flags add_flags = SYMFILE_MAINLINE; | |
290 | if (from_tty) | |
a8654e7d PW |
291 | { |
292 | add_flags |= SYMFILE_VERBOSE; | |
293 | add_flags |= SYMFILE_ALWAYS_CONFIRM; | |
294 | } | |
a2fedca9 PW |
295 | try |
296 | { | |
297 | symbol_file_add_main (exec_file_target.c_str (), add_flags); | |
298 | exec_file_attach (exec_file_target.c_str (), from_tty); | |
299 | } | |
300 | catch (gdb_exception_error &err) | |
301 | { | |
302 | warning (_("loading %ps %s"), | |
303 | styled_string (file_name_style.style (), | |
304 | exec_file_target.c_str ()), | |
305 | err.message != NULL ? err.what () : "error"); | |
306 | } | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | /* See gdbcore.h. */ | |
312 | ||
ecf45d2c SL |
313 | void |
314 | exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty) | |
315 | { | |
797bc1cb | 316 | char *exec_file_target; |
ecf45d2c SL |
317 | symfile_add_flags add_flags = 0; |
318 | ||
319 | /* Do nothing if we already have an executable filename. */ | |
320 | if (get_exec_file (0) != NULL) | |
321 | return; | |
322 | ||
323 | /* Try to determine a filename from the process itself. */ | |
324 | exec_file_target = target_pid_to_exec_file (pid); | |
325 | if (exec_file_target == NULL) | |
57d1de9c | 326 | { |
ecf45d2c SL |
327 | warning (_("No executable has been specified and target does not " |
328 | "support\n" | |
329 | "determining executable automatically. " | |
330 | "Try using the \"file\" command.")); | |
331 | return; | |
57d1de9c | 332 | } |
88178e82 | 333 | |
797bc1cb TT |
334 | gdb::unique_xmalloc_ptr<char> exec_file_host |
335 | = exec_file_find (exec_file_target, NULL); | |
ecf45d2c SL |
336 | |
337 | if (defer_bp_reset) | |
338 | add_flags |= SYMFILE_DEFER_BP_RESET; | |
339 | ||
340 | if (from_tty) | |
341 | add_flags |= SYMFILE_VERBOSE; | |
342 | ||
343 | /* Attempt to open the exec file. */ | |
797bc1cb | 344 | try_open_exec_file (exec_file_host.get (), current_inferior (), add_flags); |
a10de604 GB |
345 | } |
346 | ||
907083d1 | 347 | /* Set FILENAME as the new exec file. |
c906108c | 348 | |
c5aa993b JM |
349 | This function is intended to be behave essentially the same |
350 | as exec_file_command, except that the latter will detect when | |
351 | a target is being debugged, and will ask the user whether it | |
352 | should be shut down first. (If the answer is "no", then the | |
353 | new file is ignored.) | |
c906108c | 354 | |
c5aa993b JM |
355 | This file is used by exec_file_command, to do the work of opening |
356 | and processing the exec file after any prompting has happened. | |
c906108c | 357 | |
c5aa993b JM |
358 | And, it is used by child_attach, when the attach command was |
359 | given a pid but not a exec pathname, and the attach command could | |
360 | figure out the pathname from the pid. (In this case, we shouldn't | |
361 | ask the user whether the current target should be shut down -- | |
907083d1 | 362 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
363 | |
364 | void | |
5f08566b | 365 | exec_file_attach (const char *filename, int from_tty) |
c906108c | 366 | { |
7e10abd1 | 367 | /* First, acquire a reference to the exec_bfd. We release |
9b333ba3 TT |
368 | this at the end of the function; but acquiring it now lets the |
369 | BFD cache return it if this call refers to the same file. */ | |
7e10abd1 TT |
370 | gdb_bfd_ref_ptr exec_bfd_holder |
371 | = gdb_bfd_ref_ptr::new_reference (current_program_space->exec_bfd ()); | |
192b62ce | 372 | |
c906108c | 373 | /* Remove any previous exec file. */ |
8a4f1402 | 374 | current_program_space->exec_close (); |
c906108c SS |
375 | |
376 | /* Now open and digest the file the user requested, if any. */ | |
377 | ||
1adeb98a FN |
378 | if (!filename) |
379 | { | |
380 | if (from_tty) | |
dda83cd7 | 381 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
382 | |
383 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
384 | } |
385 | else | |
c906108c | 386 | { |
64c0b5de | 387 | int load_via_target = 0; |
14278e1f | 388 | const char *scratch_pathname, *canonical_pathname; |
c906108c | 389 | int scratch_chan; |
d18b8b7a | 390 | char **matching; |
c5aa993b | 391 | |
64c0b5de GB |
392 | if (is_target_filename (filename)) |
393 | { | |
394 | if (target_filesystem_is_local ()) | |
395 | filename += strlen (TARGET_SYSROOT_PREFIX); | |
396 | else | |
397 | load_via_target = 1; | |
398 | } | |
399 | ||
14278e1f | 400 | gdb::unique_xmalloc_ptr<char> canonical_storage, scratch_storage; |
64c0b5de | 401 | if (load_via_target) |
c5aa993b | 402 | { |
64c0b5de GB |
403 | /* gdb_bfd_fopen does not support "target:" filenames. */ |
404 | if (write_files) | |
405 | warning (_("writing into executable files is " | |
406 | "not supported for %s sysroots"), | |
407 | TARGET_SYSROOT_PREFIX); | |
408 | ||
14278e1f | 409 | scratch_pathname = filename; |
64c0b5de | 410 | scratch_chan = -1; |
64c0b5de | 411 | canonical_pathname = scratch_pathname; |
c5aa993b | 412 | } |
64c0b5de GB |
413 | else |
414 | { | |
415 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
416 | filename, write_files ? | |
417 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, | |
e0cc99a6 | 418 | &scratch_storage); |
64c0b5de GB |
419 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
420 | if (scratch_chan < 0) | |
421 | { | |
96445f0b | 422 | int first_errno = errno; |
0ae1c716 | 423 | char *exename = (char *) alloca (strlen (filename) + 5); |
64c0b5de GB |
424 | |
425 | strcat (strcpy (exename, filename), ".exe"); | |
426 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
427 | exename, write_files ? | |
428 | O_RDWR | O_BINARY | |
429 | : O_RDONLY | O_BINARY, | |
e0cc99a6 | 430 | &scratch_storage); |
96445f0b HD |
431 | if (scratch_chan < 0) |
432 | errno = first_errno; | |
64c0b5de | 433 | } |
c906108c | 434 | #endif |
64c0b5de GB |
435 | if (scratch_chan < 0) |
436 | perror_with_name (filename); | |
a4453b7e | 437 | |
e0cc99a6 | 438 | scratch_pathname = scratch_storage.get (); |
a4453b7e | 439 | |
64c0b5de GB |
440 | /* gdb_bfd_open (and its variants) prefers canonicalized |
441 | pathname for better BFD caching. */ | |
14278e1f TT |
442 | canonical_storage = gdb_realpath (scratch_pathname); |
443 | canonical_pathname = canonical_storage.get (); | |
64c0b5de | 444 | } |
1f0c4988 | 445 | |
192b62ce | 446 | gdb_bfd_ref_ptr temp; |
64c0b5de | 447 | if (write_files && !load_via_target) |
192b62ce TT |
448 | temp = gdb_bfd_fopen (canonical_pathname, gnutarget, |
449 | FOPEN_RUB, scratch_chan); | |
1c00ec6b | 450 | else |
192b62ce | 451 | temp = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
19f6550e | 452 | current_program_space->set_exec_bfd (std::move (temp)); |
c906108c | 453 | |
7e10abd1 | 454 | if (!current_program_space->exec_bfd ()) |
9fe4a216 | 455 | { |
a2fedca9 PW |
456 | error (_("\"%ps\": could not open as an executable file: %s."), |
457 | styled_string (file_name_style.style (), scratch_pathname), | |
458 | bfd_errmsg (bfd_get_error ())); | |
9fe4a216 | 459 | } |
c906108c | 460 | |
64c0b5de GB |
461 | /* gdb_realpath_keepfile resolves symlinks on the local |
462 | filesystem and so cannot be used for "target:" files. */ | |
c20cb686 | 463 | gdb_assert (current_program_space->exec_filename == nullptr); |
64c0b5de | 464 | if (load_via_target) |
c20cb686 | 465 | current_program_space->exec_filename |
7e10abd1 TT |
466 | = (make_unique_xstrdup |
467 | (bfd_get_filename (current_program_space->exec_bfd ()))); | |
64c0b5de | 468 | else |
c20cb686 TT |
469 | current_program_space->exec_filename |
470 | = gdb_realpath_keepfile (scratch_pathname); | |
1f0c4988 | 471 | |
7e10abd1 TT |
472 | if (!bfd_check_format_matches (current_program_space->exec_bfd (), |
473 | bfd_object, &matching)) | |
c906108c SS |
474 | { |
475 | /* Make sure to close exec_bfd, or else "run" might try to use | |
476 | it. */ | |
8a4f1402 | 477 | current_program_space->exec_close (); |
a2fedca9 PW |
478 | error (_("\"%ps\": not in executable format: %s"), |
479 | styled_string (file_name_style.style (), scratch_pathname), | |
803c08d0 | 480 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); |
c906108c SS |
481 | } |
482 | ||
7e10abd1 TT |
483 | target_section_table sections |
484 | = build_section_table (current_program_space->exec_bfd ()); | |
c906108c | 485 | |
7e10abd1 TT |
486 | current_program_space->ebfd_mtime |
487 | = bfd_get_mtime (current_program_space->exec_bfd ()); | |
c04ea773 | 488 | |
c906108c SS |
489 | validate_files (); |
490 | ||
7e10abd1 | 491 | set_gdbarch_from_file (current_program_space->exec_bfd ()); |
c906108c | 492 | |
07b82ea5 | 493 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
494 | list of sections. This possibly pushes the exec_ops |
495 | target. */ | |
3769e227 TT |
496 | current_program_space->add_target_sections (¤t_program_space->ebfd, |
497 | sections); | |
c906108c SS |
498 | |
499 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
500 | if (deprecated_exec_file_display_hook) |
501 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 502 | } |
9b333ba3 | 503 | |
ce7d4522 | 504 | bfd_cache_close_all (); |
76727919 | 505 | gdb::observers::executable_changed.notify (); |
c906108c SS |
506 | } |
507 | ||
508 | /* Process the first arg in ARGS as the new exec file. | |
509 | ||
c5aa993b JM |
510 | Note that we have to explicitly ignore additional args, since we can |
511 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
512 | which can take multiple args. |
513 | ||
0963b4bd | 514 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 515 | |
1adeb98a | 516 | static void |
1d8b34a7 | 517 | exec_file_command (const char *args, int from_tty) |
c906108c | 518 | { |
55f6301a | 519 | if (from_tty && target_has_execution () |
4c42eaff DJ |
520 | && !query (_("A program is being debugged already.\n" |
521 | "Are you sure you want to change the file? "))) | |
522 | error (_("File not changed.")); | |
1adeb98a FN |
523 | |
524 | if (args) | |
525 | { | |
526 | /* Scan through the args and pick up the first non option arg | |
dda83cd7 | 527 | as the filename. */ |
1adeb98a | 528 | |
773a1edc TT |
529 | gdb_argv built_argv (args); |
530 | char **argv = built_argv.get (); | |
1adeb98a FN |
531 | |
532 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
dda83cd7 SM |
533 | {; |
534 | } | |
1adeb98a | 535 | if (*argv == NULL) |
dda83cd7 | 536 | error (_("No executable file name was specified")); |
1adeb98a | 537 | |
773a1edc TT |
538 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (*argv)); |
539 | exec_file_attach (filename.get (), from_tty); | |
1adeb98a FN |
540 | } |
541 | else | |
542 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
543 | } |
544 | ||
0963b4bd | 545 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
546 | What a novelty. Why did GDB go through four major releases before this |
547 | command was added? */ | |
548 | ||
549 | static void | |
1d8b34a7 | 550 | file_command (const char *arg, int from_tty) |
c906108c SS |
551 | { |
552 | /* FIXME, if we lose on reading the symbol file, we should revert | |
553 | the exec file, but that's rough. */ | |
554 | exec_file_command (arg, from_tty); | |
555 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
556 | if (deprecated_file_changed_hook) |
557 | deprecated_file_changed_hook (arg); | |
c906108c | 558 | } |
c906108c | 559 | \f |
c5aa993b | 560 | |
2d128614 | 561 | /* Builds a section table, given args BFD, TABLE. */ |
c906108c | 562 | |
2d128614 TT |
563 | target_section_table |
564 | build_section_table (struct bfd *some_bfd) | |
c906108c | 565 | { |
2d128614 TT |
566 | target_section_table table; |
567 | ||
8a6bb1d1 TT |
568 | for (asection *asect : gdb_bfd_sections (some_bfd)) |
569 | { | |
570 | flagword aflag; | |
571 | ||
572 | /* Check the section flags, but do not discard zero-length | |
573 | sections, since some symbols may still be attached to this | |
574 | section. For instance, we encountered on sparc-solaris 2.10 | |
575 | a shared library with an empty .bss section to which a symbol | |
576 | named "_end" was attached. The address of this symbol still | |
577 | needs to be relocated. */ | |
578 | aflag = bfd_section_flags (asect); | |
579 | if (!(aflag & SEC_ALLOC)) | |
580 | continue; | |
581 | ||
6be2a9ab TT |
582 | table.emplace_back (bfd_section_vma (asect), |
583 | bfd_section_vma (asect) + bfd_section_size (asect), | |
584 | asect); | |
8a6bb1d1 | 585 | } |
e2ff18a0 | 586 | |
2d128614 | 587 | return table; |
c906108c | 588 | } |
07b82ea5 PA |
589 | |
590 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
591 | current set of target sections. */ | |
592 | ||
593 | void | |
3769e227 TT |
594 | program_space::add_target_sections (void *owner, |
595 | const target_section_table §ions) | |
07b82ea5 | 596 | { |
d7a78e5c | 597 | if (!sections.empty ()) |
07b82ea5 | 598 | { |
d7a78e5c | 599 | for (const target_section &s : sections) |
ed9eebaf | 600 | { |
02f7d26b AB |
601 | m_target_sections.push_back (s); |
602 | m_target_sections.back ().owner = owner; | |
ed9eebaf | 603 | } |
07b82ea5 | 604 | |
53af73bf | 605 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f | 606 | |
07b82ea5 | 607 | /* If these are the first file sections we can provide memory |
5b6d1e4f PA |
608 | from, push the file_stratum target. Must do this in all |
609 | inferiors sharing the program space. */ | |
610 | for (inferior *inf : all_inferiors ()) | |
611 | { | |
3769e227 | 612 | if (inf->pspace != this) |
5b6d1e4f PA |
613 | continue; |
614 | ||
615 | if (inf->target_is_pushed (&exec_ops)) | |
616 | continue; | |
617 | ||
618 | switch_to_inferior_no_thread (inf); | |
02980c56 | 619 | inf->push_target (&exec_ops); |
5b6d1e4f | 620 | } |
07b82ea5 PA |
621 | } |
622 | } | |
623 | ||
76ad5e1e NB |
624 | /* Add the sections of OBJFILE to the current set of target sections. */ |
625 | ||
626 | void | |
d9eebde0 | 627 | program_space::add_target_sections (struct objfile *objfile) |
76ad5e1e | 628 | { |
76ad5e1e | 629 | struct obj_section *osect; |
76ad5e1e | 630 | |
91840ee3 | 631 | gdb_assert (objfile != nullptr); |
76ad5e1e NB |
632 | |
633 | /* Compute the number of sections to add. */ | |
76ad5e1e NB |
634 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
635 | { | |
fd361982 | 636 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
637 | continue; |
638 | ||
02f7d26b AB |
639 | m_target_sections.emplace_back (obj_section_addr (osect), |
640 | obj_section_endaddr (osect), | |
641 | osect->the_bfd_section, (void *) objfile); | |
76ad5e1e NB |
642 | } |
643 | } | |
644 | ||
046ac79f JK |
645 | /* Remove all target sections owned by OWNER. |
646 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
647 | |
648 | void | |
2a3f84af | 649 | program_space::remove_target_sections (void *owner) |
07b82ea5 | 650 | { |
046ac79f JK |
651 | gdb_assert (owner != NULL); |
652 | ||
02f7d26b AB |
653 | auto it = std::remove_if (m_target_sections.begin (), |
654 | m_target_sections.end (), | |
bb2a6777 TT |
655 | [&] (target_section §) |
656 | { | |
657 | return sect.owner == owner; | |
658 | }); | |
02f7d26b | 659 | m_target_sections.erase (it, m_target_sections.end ()); |
bb2a6777 TT |
660 | |
661 | /* If we don't have any more sections to read memory from, | |
662 | remove the file_stratum target from the stack of each | |
663 | inferior sharing the program space. */ | |
02f7d26b | 664 | if (m_target_sections.empty ()) |
07b82ea5 | 665 | { |
bb2a6777 | 666 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
07b82ea5 | 667 | |
bb2a6777 | 668 | for (inferior *inf : all_inferiors ()) |
6c95b8df | 669 | { |
2a3f84af | 670 | if (inf->pspace != this) |
bb2a6777 | 671 | continue; |
6c95b8df | 672 | |
bb2a6777 | 673 | switch_to_inferior_no_thread (inf); |
fadf6add | 674 | inf->unpush_target (&exec_ops); |
6c95b8df | 675 | } |
07b82ea5 PA |
676 | } |
677 | } | |
678 | ||
5b6d1e4f PA |
679 | /* See exec.h. */ |
680 | ||
681 | void | |
682 | exec_on_vfork () | |
683 | { | |
02f7d26b | 684 | if (!current_program_space->target_sections ().empty ()) |
02980c56 | 685 | current_inferior ()->push_target (&exec_ops); |
5b6d1e4f PA |
686 | } |
687 | ||
c906108c | 688 | \f |
348f8c02 | 689 | |
1ca49d37 YQ |
690 | enum target_xfer_status |
691 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
692 | ULONGEST len, ULONGEST *xfered_len) | |
693 | { | |
694 | /* It's unduly pedantic to refuse to look at the executable for | |
695 | read-only pieces; so do the equivalent of readonly regions aka | |
696 | QTro packet. */ | |
7e10abd1 | 697 | if (current_program_space->exec_bfd () != NULL) |
1ca49d37 YQ |
698 | { |
699 | asection *s; | |
700 | bfd_size_type size; | |
701 | bfd_vma vma; | |
702 | ||
7e10abd1 | 703 | for (s = current_program_space->exec_bfd ()->sections; s; s = s->next) |
1ca49d37 YQ |
704 | { |
705 | if ((s->flags & SEC_LOAD) == 0 | |
706 | || (s->flags & SEC_READONLY) == 0) | |
707 | continue; | |
708 | ||
709 | vma = s->vma; | |
fd361982 | 710 | size = bfd_section_size (s); |
1ca49d37 YQ |
711 | if (vma <= offset && offset < (vma + size)) |
712 | { | |
713 | ULONGEST amt; | |
714 | ||
715 | amt = (vma + size) - offset; | |
716 | if (amt > len) | |
717 | amt = len; | |
718 | ||
7e10abd1 | 719 | amt = bfd_get_section_contents (current_program_space->exec_bfd (), s, |
1ca49d37 YQ |
720 | readbuf, offset - vma, amt); |
721 | ||
722 | if (amt == 0) | |
723 | return TARGET_XFER_EOF; | |
724 | else | |
725 | { | |
726 | *xfered_len = amt; | |
727 | return TARGET_XFER_OK; | |
728 | } | |
729 | } | |
730 | } | |
731 | } | |
732 | ||
733 | /* Indicate failure to find the requested memory block. */ | |
734 | return TARGET_XFER_E_IO; | |
735 | } | |
736 | ||
a79b1bc6 | 737 | /* Return all read-only memory ranges found in the target section |
5a2eb0ef | 738 | table defined by SECTIONS and SECTIONS_END, starting at (and |
a79b1bc6 | 739 | intersected with) MEMADDR for LEN bytes. */ |
5a2eb0ef | 740 | |
a79b1bc6 SM |
741 | static std::vector<mem_range> |
742 | section_table_available_memory (CORE_ADDR memaddr, ULONGEST len, | |
bb2a6777 | 743 | const target_section_table §ions) |
e6ca34fc | 744 | { |
a79b1bc6 | 745 | std::vector<mem_range> memory; |
e6ca34fc | 746 | |
d7a78e5c | 747 | for (const target_section &p : sections) |
e6ca34fc | 748 | { |
bb2a6777 | 749 | if ((bfd_section_flags (p.the_bfd_section) & SEC_READONLY) == 0) |
e6ca34fc PA |
750 | continue; |
751 | ||
752 | /* Copy the meta-data, adjusted. */ | |
bb2a6777 | 753 | if (mem_ranges_overlap (p.addr, p.endaddr - p.addr, memaddr, len)) |
e6ca34fc PA |
754 | { |
755 | ULONGEST lo1, hi1, lo2, hi2; | |
e6ca34fc PA |
756 | |
757 | lo1 = memaddr; | |
758 | hi1 = memaddr + len; | |
759 | ||
bb2a6777 TT |
760 | lo2 = p.addr; |
761 | hi2 = p.endaddr; | |
e6ca34fc | 762 | |
a79b1bc6 SM |
763 | CORE_ADDR start = std::max (lo1, lo2); |
764 | int length = std::min (hi1, hi2) - start; | |
e6ca34fc | 765 | |
a79b1bc6 | 766 | memory.emplace_back (start, length); |
e6ca34fc PA |
767 | } |
768 | } | |
769 | ||
770 | return memory; | |
771 | } | |
772 | ||
1ee79381 YQ |
773 | enum target_xfer_status |
774 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
775 | ULONGEST len, ULONGEST *xfered_len) | |
776 | { | |
336aa7b7 | 777 | const target_section_table *table |
328d42d8 | 778 | = target_get_section_table (current_inferior ()->top_target ()); |
a79b1bc6 | 779 | std::vector<mem_range> available_memory |
bb2a6777 | 780 | = section_table_available_memory (offset, len, *table); |
1ee79381 | 781 | |
a79b1bc6 | 782 | normalize_mem_ranges (&available_memory); |
1ee79381 | 783 | |
a79b1bc6 | 784 | for (const mem_range &r : available_memory) |
1ee79381 | 785 | { |
a79b1bc6 | 786 | if (mem_ranges_overlap (r.start, r.length, offset, len)) |
1ee79381 YQ |
787 | { |
788 | CORE_ADDR end; | |
789 | enum target_xfer_status status; | |
790 | ||
791 | /* Get the intersection window. */ | |
a79b1bc6 | 792 | end = std::min<CORE_ADDR> (offset + len, r.start + r.length); |
1ee79381 YQ |
793 | |
794 | gdb_assert (end - offset <= len); | |
795 | ||
a79b1bc6 | 796 | if (offset >= r.start) |
1ee79381 YQ |
797 | status = exec_read_partial_read_only (readbuf, offset, |
798 | end - offset, | |
799 | xfered_len); | |
800 | else | |
801 | { | |
a79b1bc6 | 802 | *xfered_len = r.start - offset; |
bc113b4e | 803 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 | 804 | } |
1ee79381 YQ |
805 | return status; |
806 | } | |
807 | } | |
1ee79381 YQ |
808 | |
809 | *xfered_len = len; | |
bc113b4e | 810 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
811 | } |
812 | ||
9b409511 | 813 | enum target_xfer_status |
07b82ea5 | 814 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 815 | ULONGEST offset, ULONGEST len, |
9b409511 | 816 | ULONGEST *xfered_len, |
bb2a6777 | 817 | const target_section_table §ions, |
e56cb451 KB |
818 | gdb::function_view<bool |
819 | (const struct target_section *)> match_cb) | |
c906108c | 820 | { |
020cc13c | 821 | int res; |
07b82ea5 PA |
822 | ULONGEST memaddr = offset; |
823 | ULONGEST memend = memaddr + len; | |
c906108c | 824 | |
e2ff18a0 | 825 | gdb_assert (len != 0); |
c906108c | 826 | |
d7a78e5c | 827 | for (const target_section &p : sections) |
c906108c | 828 | { |
bb2a6777 | 829 | struct bfd_section *asect = p.the_bfd_section; |
2b2848e2 DE |
830 | bfd *abfd = asect->owner; |
831 | ||
bb2a6777 | 832 | if (match_cb != nullptr && !match_cb (&p)) |
0963b4bd | 833 | continue; /* not the section we need. */ |
bb2a6777 | 834 | if (memaddr >= p.addr) |
dda83cd7 | 835 | { |
bb2a6777 | 836 | if (memend <= p.endaddr) |
3db26b01 JB |
837 | { |
838 | /* Entire transfer is within this section. */ | |
07b82ea5 | 839 | if (writebuf) |
2b2848e2 | 840 | res = bfd_set_section_contents (abfd, asect, |
bb2a6777 | 841 | writebuf, memaddr - p.addr, |
85302095 AC |
842 | len); |
843 | else | |
2b2848e2 | 844 | res = bfd_get_section_contents (abfd, asect, |
bb2a6777 | 845 | readbuf, memaddr - p.addr, |
85302095 | 846 | len); |
9b409511 YQ |
847 | |
848 | if (res != 0) | |
849 | { | |
850 | *xfered_len = len; | |
851 | return TARGET_XFER_OK; | |
852 | } | |
853 | else | |
854 | return TARGET_XFER_EOF; | |
3db26b01 | 855 | } |
bb2a6777 | 856 | else if (memaddr >= p.endaddr) |
3db26b01 JB |
857 | { |
858 | /* This section ends before the transfer starts. */ | |
859 | continue; | |
860 | } | |
861 | else | |
862 | { | |
863 | /* This section overlaps the transfer. Just do half. */ | |
bb2a6777 | 864 | len = p.endaddr - memaddr; |
07b82ea5 | 865 | if (writebuf) |
2b2848e2 | 866 | res = bfd_set_section_contents (abfd, asect, |
bb2a6777 | 867 | writebuf, memaddr - p.addr, |
85302095 AC |
868 | len); |
869 | else | |
2b2848e2 | 870 | res = bfd_get_section_contents (abfd, asect, |
bb2a6777 | 871 | readbuf, memaddr - p.addr, |
85302095 | 872 | len); |
9b409511 YQ |
873 | if (res != 0) |
874 | { | |
875 | *xfered_len = len; | |
876 | return TARGET_XFER_OK; | |
877 | } | |
878 | else | |
879 | return TARGET_XFER_EOF; | |
3db26b01 | 880 | } |
dda83cd7 | 881 | } |
c906108c SS |
882 | } |
883 | ||
9b409511 | 884 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 885 | } |
348f8c02 | 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 | { |
19cf757a | 893 | const target_section_table *table = target_get_section_table (this); |
07b82ea5 PA |
894 | |
895 | if (object == TARGET_OBJECT_MEMORY) | |
896 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 897 | offset, len, xfered_len, |
bb2a6777 | 898 | *table); |
07b82ea5 | 899 | else |
2ed4b548 | 900 | return TARGET_XFER_E_IO; |
348f8c02 | 901 | } |
c906108c | 902 | \f |
c5aa993b | 903 | |
c906108c | 904 | void |
19cf757a | 905 | print_section_info (const target_section_table *t, bfd *abfd) |
c906108c | 906 | { |
5af949e3 | 907 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
17a912b6 | 908 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 909 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 910 | |
a2fedca9 PW |
911 | printf_filtered ("\t`%ps', ", |
912 | styled_string (file_name_style.style (), | |
913 | bfd_get_filename (abfd))); | |
c906108c | 914 | wrap_here (" "); |
a3f17187 | 915 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
7e10abd1 | 916 | if (abfd == current_program_space->exec_bfd ()) |
51bee8e9 | 917 | { |
3e43a32a MS |
918 | /* gcc-3.4 does not like the initialization in |
919 | <p == t->sections_end>. */ | |
d904de5b | 920 | bfd_vma displacement = 0; |
2f1bdd26 | 921 | bfd_vma entry_point; |
bb2a6777 | 922 | bool found = false; |
51bee8e9 | 923 | |
d7a78e5c | 924 | for (const target_section &p : *t) |
51bee8e9 | 925 | { |
bb2a6777 | 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 | { |
bb2a6777 TT |
936 | displacement = p.addr - bfd_section_vma (psect); |
937 | found = true; | |
51bee8e9 JK |
938 | break; |
939 | } | |
940 | } | |
bb2a6777 | 941 | if (!found) |
a2fedca9 PW |
942 | warning (_("Cannot find section for the entry point of %ps."), |
943 | styled_string (file_name_style.style (), | |
944 | bfd_get_filename (abfd))); | |
51bee8e9 | 945 | |
2f1bdd26 MGD |
946 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
947 | bfd_get_start_address (abfd) | |
948 | + displacement); | |
51bee8e9 | 949 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 950 | paddress (gdbarch, entry_point)); |
51bee8e9 | 951 | } |
d7a78e5c | 952 | for (const target_section &p : *t) |
c906108c | 953 | { |
bb2a6777 | 954 | struct bfd_section *psect = p.the_bfd_section; |
2b2848e2 DE |
955 | bfd *pbfd = psect->owner; |
956 | ||
bb2a6777 TT |
957 | printf_filtered ("\t%s", hex_string_custom (p.addr, wid)); |
958 | printf_filtered (" - %s", hex_string_custom (p.endaddr, wid)); | |
bcf16802 KB |
959 | |
960 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
961 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
962 | since most output will then be much wider than necessary. It | |
963 | may make sense to test the size of the file and choose the | |
964 | format string accordingly. */ | |
a3f17187 | 965 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
966 | if (info_verbose) |
967 | printf_filtered (" @ %s", | |
2b2848e2 | 968 | hex_string_custom (psect->filepos, 8)); |
fd361982 | 969 | printf_filtered (" is %s", bfd_section_name (psect)); |
2b2848e2 | 970 | if (pbfd != abfd) |
a2fedca9 PW |
971 | printf_filtered (" in %ps", |
972 | styled_string (file_name_style.style (), | |
973 | bfd_get_filename (pbfd))); | |
c906108c SS |
974 | printf_filtered ("\n"); |
975 | } | |
976 | } | |
977 | ||
f6ac5f3d PA |
978 | void |
979 | exec_target::files_info () | |
c906108c | 980 | { |
7e10abd1 | 981 | if (current_program_space->exec_bfd ()) |
02f7d26b | 982 | print_section_info (¤t_program_space->target_sections (), |
7e10abd1 | 983 | current_program_space->exec_bfd ()); |
57008375 JK |
984 | else |
985 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
986 | } |
987 | ||
988 | static void | |
0b39b52e | 989 | set_section_command (const char *args, int from_tty) |
c906108c | 990 | { |
0b39b52e | 991 | const char *secname; |
c906108c SS |
992 | |
993 | if (args == 0) | |
8a3fe4f8 | 994 | error (_("Must specify section name and its virtual address")); |
c906108c | 995 | |
0963b4bd | 996 | /* Parse out section name. */ |
c5aa993b | 997 | for (secname = args; !isspace (*args); args++); |
dd80d750 | 998 | unsigned seclen = args - secname; |
c906108c | 999 | |
0963b4bd | 1000 | /* Parse out new virtual address. */ |
dd80d750 | 1001 | CORE_ADDR secaddr = parse_and_eval_address (args); |
c906108c | 1002 | |
02f7d26b | 1003 | for (target_section &p : current_program_space->target_sections ()) |
c5aa993b | 1004 | { |
bb2a6777 TT |
1005 | if (!strncmp (secname, bfd_section_name (p.the_bfd_section), seclen) |
1006 | && bfd_section_name (p.the_bfd_section)[seclen] == '\0') | |
c5aa993b | 1007 | { |
dd80d750 | 1008 | long offset = secaddr - p.addr; |
bb2a6777 TT |
1009 | p.addr += offset; |
1010 | p.endaddr += offset; | |
c5aa993b | 1011 | if (from_tty) |
f6ac5f3d | 1012 | exec_ops.files_info (); |
c5aa993b JM |
1013 | return; |
1014 | } | |
c906108c | 1015 | } |
dd80d750 AB |
1016 | |
1017 | std::string secprint (secname, seclen); | |
1018 | error (_("Section %s not found"), secprint.c_str ()); | |
c906108c SS |
1019 | } |
1020 | ||
30510692 DJ |
1021 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
1022 | it to ADDRESS. */ | |
c1bd25fd DJ |
1023 | |
1024 | void | |
1025 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
1026 | { | |
02f7d26b | 1027 | for (target_section &p : current_program_space->target_sections ()) |
c1bd25fd | 1028 | { |
c7e97679 | 1029 | if (filename_cmp (filename, |
bb2a6777 TT |
1030 | bfd_get_filename (p.the_bfd_section->owner)) == 0 |
1031 | && index == p.the_bfd_section->index) | |
c1bd25fd | 1032 | { |
bb2a6777 TT |
1033 | p.endaddr += address - p.addr; |
1034 | p.addr = address; | |
c1bd25fd DJ |
1035 | } |
1036 | } | |
1037 | } | |
1038 | ||
57810aa7 | 1039 | bool |
f6ac5f3d | 1040 | exec_target::has_memory () |
c35b1492 PA |
1041 | { |
1042 | /* We can provide memory if we have any file/target sections to read | |
1043 | from. */ | |
02f7d26b | 1044 | return !current_program_space->target_sections ().empty (); |
c35b1492 PA |
1045 | } |
1046 | ||
24f5300a | 1047 | gdb::unique_xmalloc_ptr<char> |
f6ac5f3d | 1048 | exec_target::make_corefile_notes (bfd *obfd, int *note_size) |
83814951 TT |
1049 | { |
1050 | error (_("Can't create a corefile")); | |
1051 | } | |
be4d1333 | 1052 | |
f6ac5f3d PA |
1053 | int |
1054 | exec_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
c906108c | 1055 | { |
f6ac5f3d | 1056 | return objfile_find_memory_regions (this, func, data); |
c906108c SS |
1057 | } |
1058 | ||
6c265988 | 1059 | void _initialize_exec (); |
c906108c | 1060 | void |
6c265988 | 1061 | _initialize_exec () |
c906108c SS |
1062 | { |
1063 | struct cmd_list_element *c; | |
1064 | ||
c906108c SS |
1065 | if (!dbx_commands) |
1066 | { | |
1a966eab AC |
1067 | c = add_cmd ("file", class_files, file_command, _("\ |
1068 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
1069 | It is read for its symbols, for getting the contents of pure memory,\n\ |
1070 | and it is the program executed when you use the `run' command.\n\ | |
1071 | If FILE cannot be found as specified, your execution directory path\n\ | |
1072 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 1073 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 1074 | set_cmd_completer (c, filename_completer); |
c906108c SS |
1075 | } |
1076 | ||
1a966eab AC |
1077 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
1078 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
1079 | If FILE cannot be found as specified, your execution directory path\n\ |
1080 | is searched for a command of that name.\n\ | |
1a966eab | 1081 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 1082 | set_cmd_completer (c, filename_completer); |
c906108c | 1083 | |
1bedd215 AC |
1084 | add_com ("section", class_files, set_section_command, _("\ |
1085 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1086 | This can be used if the exec file does not contain section addresses,\n\ |
1087 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1088 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1089 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1090 | |
5bf193a2 AC |
1091 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1092 | Set writing into executable and core files."), _("\ | |
1093 | Show writing into executable and core files."), NULL, | |
1094 | NULL, | |
920d2a44 | 1095 | show_write_files, |
5bf193a2 | 1096 | &setlist, &showlist); |
c5aa993b | 1097 | |
a2fedca9 PW |
1098 | add_setshow_enum_cmd ("exec-file-mismatch", class_support, |
1099 | exec_file_mismatch_names, | |
1100 | &exec_file_mismatch, | |
1101 | _("\ | |
1102 | Set exec-file-mismatch handling (ask|warn|off)."), | |
1103 | _("\ | |
1104 | Show exec-file-mismatch handling (ask|warn|off)."), | |
1105 | _("\ | |
98c59b52 PA |
1106 | Specifies how to handle a mismatch between the current exec-file\n\ |
1107 | loaded by GDB and the exec-file automatically determined when attaching\n\ | |
a2fedca9 PW |
1108 | to a process:\n\n\ |
1109 | ask - warn the user and ask whether to load the determined exec-file.\n\ | |
1110 | warn - warn the user, but do not change the exec-file.\n\ | |
0a278aa7 PW |
1111 | off - do not check for mismatch.\n\ |
1112 | \n\ | |
1113 | GDB detects a mismatch by comparing the build IDs of the files.\n\ | |
1114 | If the user confirms loading the determined exec-file, then its symbols\n\ | |
1115 | will be loaded as well."), | |
a2fedca9 PW |
1116 | set_exec_file_mismatch_command, |
1117 | show_exec_file_mismatch_command, | |
1118 | &setlist, &showlist); | |
1119 | ||
d9f719f1 | 1120 | add_target (exec_target_info, exec_target_open, filename_completer); |
c906108c | 1121 | } |