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" | |
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; | |
d7a78e5c | 78 | target_section_table *get_section_table () override; |
f6ac5f3d PA |
79 | void files_info () override; |
80 | ||
57810aa7 | 81 | bool has_memory () override; |
24f5300a | 82 | gdb::unique_xmalloc_ptr<char> make_corefile_notes (bfd *, int *) override; |
f6ac5f3d PA |
83 | int find_memory_regions (find_memory_region_ftype func, void *data) override; |
84 | }; | |
85 | ||
86 | static exec_target exec_ops; | |
c906108c | 87 | |
a2fedca9 PW |
88 | /* How to handle a mismatch between the current exec file and the exec |
89 | file determined from target. */ | |
90 | ||
91 | static const char *const exec_file_mismatch_names[] | |
92 | = {"ask", "warn", "off", NULL }; | |
93 | enum exec_file_mismatch_mode | |
94 | { | |
95 | exec_file_mismatch_ask, exec_file_mismatch_warn, exec_file_mismatch_off | |
96 | }; | |
97 | static const char *exec_file_mismatch = exec_file_mismatch_names[0]; | |
98 | static enum exec_file_mismatch_mode exec_file_mismatch_mode | |
99 | = exec_file_mismatch_ask; | |
100 | ||
101 | /* Show command. */ | |
102 | static void | |
103 | show_exec_file_mismatch_command (struct ui_file *file, int from_tty, | |
104 | struct cmd_list_element *c, const char *value) | |
105 | { | |
106 | fprintf_filtered (gdb_stdout, | |
107 | _("exec-file-mismatch handling is currently \"%s\".\n"), | |
108 | exec_file_mismatch_names[exec_file_mismatch_mode]); | |
109 | } | |
110 | ||
111 | /* Set command. Change the setting for range checking. */ | |
112 | static void | |
113 | set_exec_file_mismatch_command (const char *ignore, | |
114 | int from_tty, struct cmd_list_element *c) | |
115 | { | |
116 | for (enum exec_file_mismatch_mode mode = exec_file_mismatch_ask; | |
117 | ; | |
118 | mode = static_cast<enum exec_file_mismatch_mode>(1 + (int) mode)) | |
119 | { | |
120 | if (strcmp (exec_file_mismatch, exec_file_mismatch_names[mode]) == 0) | |
121 | { | |
122 | exec_file_mismatch_mode = mode; | |
123 | return; | |
124 | } | |
125 | if (mode == exec_file_mismatch_off) | |
126 | internal_error (__FILE__, __LINE__, | |
127 | _("Unrecognized exec-file-mismatch setting: \"%s\""), | |
128 | exec_file_mismatch); | |
129 | } | |
130 | } | |
131 | ||
c906108c SS |
132 | /* Whether to open exec and core files read-only or read-write. */ |
133 | ||
491144b5 | 134 | bool write_files = false; |
920d2a44 AC |
135 | static void |
136 | show_write_files (struct ui_file *file, int from_tty, | |
137 | struct cmd_list_element *c, const char *value) | |
138 | { | |
139 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), | |
140 | value); | |
141 | } | |
142 | ||
c906108c | 143 | |
d9f719f1 PA |
144 | static void |
145 | exec_target_open (const char *args, int from_tty) | |
1adeb98a FN |
146 | { |
147 | target_preopen (from_tty); | |
148 | exec_file_attach (args, from_tty); | |
149 | } | |
150 | ||
6c95b8df PA |
151 | /* This is the target_close implementation. Clears all target |
152 | sections and closes all executable bfds from all program spaces. */ | |
153 | ||
f6ac5f3d PA |
154 | void |
155 | exec_target::close () | |
c906108c | 156 | { |
5ed8105e | 157 | scoped_restore_current_program_space restore_pspace; |
6c95b8df | 158 | |
94c93c35 | 159 | for (struct program_space *ss : program_spaces) |
5ed8105e PA |
160 | { |
161 | set_current_program_space (ss); | |
b55221ab | 162 | ss->target_sections.clear (); |
8a4f1402 | 163 | ss->exec_close (); |
5ed8105e | 164 | } |
c906108c SS |
165 | } |
166 | ||
f6ac5f3d | 167 | /* See gdbcore.h. */ |
a10de604 GB |
168 | |
169 | void | |
ecf45d2c SL |
170 | try_open_exec_file (const char *exec_file_host, struct inferior *inf, |
171 | symfile_add_flags add_flags) | |
a10de604 | 172 | { |
cc06b668 | 173 | struct gdb_exception prev_err; |
a10de604 | 174 | |
57d1de9c LM |
175 | /* exec_file_attach and symbol_file_add_main may throw an error if the file |
176 | cannot be opened either locally or remotely. | |
177 | ||
178 | This happens for example, when the file is first found in the local | |
179 | sysroot (above), and then disappears (a TOCTOU race), or when it doesn't | |
180 | exist in the target filesystem, or when the file does exist, but | |
181 | is not readable. | |
88178e82 | 182 | |
57d1de9c LM |
183 | Even without a symbol file, the remote-based debugging session should |
184 | continue normally instead of ending abruptly. Hence we catch thrown | |
185 | errors/exceptions in the following code. */ | |
a70b8144 | 186 | try |
57d1de9c | 187 | { |
ecf45d2c SL |
188 | /* We must do this step even if exec_file_host is NULL, so that |
189 | exec_file_attach will clear state. */ | |
190 | exec_file_attach (exec_file_host, add_flags & SYMFILE_VERBOSE); | |
57d1de9c | 191 | } |
94aeb44b | 192 | catch (gdb_exception_error &err) |
57d1de9c LM |
193 | { |
194 | if (err.message != NULL) | |
3d6e9d23 | 195 | warning ("%s", err.what ()); |
57d1de9c | 196 | |
94aeb44b | 197 | prev_err = std::move (err); |
57d1de9c | 198 | } |
57d1de9c | 199 | |
ecf45d2c | 200 | if (exec_file_host != NULL) |
57d1de9c | 201 | { |
a70b8144 | 202 | try |
ecf45d2c SL |
203 | { |
204 | symbol_file_add_main (exec_file_host, add_flags); | |
205 | } | |
230d2906 | 206 | catch (const gdb_exception_error &err) |
ecf45d2c SL |
207 | { |
208 | if (!exception_print_same (prev_err, err)) | |
3d6e9d23 | 209 | warning ("%s", err.what ()); |
ecf45d2c | 210 | } |
57d1de9c | 211 | } |
ecf45d2c SL |
212 | } |
213 | ||
214 | /* See gdbcore.h. */ | |
215 | ||
a2fedca9 PW |
216 | void |
217 | validate_exec_file (int from_tty) | |
218 | { | |
219 | /* If user asked to ignore the mismatch, do nothing. */ | |
220 | if (exec_file_mismatch_mode == exec_file_mismatch_off) | |
221 | return; | |
222 | ||
223 | const char *current_exec_file = get_exec_file (0); | |
224 | struct inferior *inf = current_inferior (); | |
225 | /* Try to determine a filename from the process itself. */ | |
226 | const char *pid_exec_file = target_pid_to_exec_file (inf->pid); | |
98c59b52 | 227 | bool build_id_mismatch = false; |
a2fedca9 | 228 | |
98c59b52 | 229 | /* If we cannot validate the exec file, return. */ |
a2fedca9 PW |
230 | if (current_exec_file == NULL || pid_exec_file == NULL) |
231 | return; | |
232 | ||
98c59b52 PA |
233 | /* Try validating via build-id, if available. This is the most |
234 | reliable check. */ | |
48e9cc84 PW |
235 | |
236 | /* In case current_exec_file was changed, reopen_exec_file ensures | |
237 | an up to date build_id (will do nothing if the file timestamp | |
238 | did not change). If exec file changed, reopen_exec_file has | |
239 | allocated another file name, so get_exec_file again. */ | |
240 | reopen_exec_file (); | |
241 | current_exec_file = get_exec_file (0); | |
242 | ||
7e10abd1 TT |
243 | const bfd_build_id *exec_file_build_id |
244 | = build_id_bfd_get (current_program_space->exec_bfd ()); | |
98c59b52 PA |
245 | if (exec_file_build_id != nullptr) |
246 | { | |
247 | /* Prepend the target prefix, to force gdb_bfd_open to open the | |
248 | file on the remote file system (if indeed remote). */ | |
249 | std::string target_pid_exec_file | |
250 | = std::string (TARGET_SYSROOT_PREFIX) + pid_exec_file; | |
251 | ||
252 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (target_pid_exec_file.c_str (), | |
253 | gnutarget, -1, false)); | |
254 | if (abfd != nullptr) | |
255 | { | |
256 | const bfd_build_id *target_exec_file_build_id | |
257 | = build_id_bfd_get (abfd.get ()); | |
a2fedca9 | 258 | |
98c59b52 PA |
259 | if (target_exec_file_build_id != nullptr) |
260 | { | |
261 | if (exec_file_build_id->size == target_exec_file_build_id->size | |
262 | && memcmp (exec_file_build_id->data, | |
263 | target_exec_file_build_id->data, | |
264 | exec_file_build_id->size) == 0) | |
265 | { | |
266 | /* Match. */ | |
267 | return; | |
268 | } | |
269 | else | |
270 | build_id_mismatch = true; | |
271 | } | |
272 | } | |
273 | } | |
a2fedca9 | 274 | |
98c59b52 | 275 | if (build_id_mismatch) |
a2fedca9 | 276 | { |
98c59b52 PA |
277 | std::string exec_file_target (pid_exec_file); |
278 | ||
279 | /* In case the exec file is not local, exec_file_target has to point at | |
280 | the target file system. */ | |
281 | if (is_target_filename (current_exec_file) && !target_filesystem_is_local ()) | |
282 | exec_file_target = TARGET_SYSROOT_PREFIX + exec_file_target; | |
283 | ||
a2fedca9 | 284 | warning |
0a278aa7 | 285 | (_("Build ID mismatch between current exec-file %ps\n" |
a2fedca9 PW |
286 | "and automatically determined exec-file %ps\n" |
287 | "exec-file-mismatch handling is currently \"%s\""), | |
288 | styled_string (file_name_style.style (), current_exec_file), | |
289 | styled_string (file_name_style.style (), exec_file_target.c_str ()), | |
290 | exec_file_mismatch_names[exec_file_mismatch_mode]); | |
291 | if (exec_file_mismatch_mode == exec_file_mismatch_ask) | |
292 | { | |
293 | symfile_add_flags add_flags = SYMFILE_MAINLINE; | |
294 | if (from_tty) | |
a8654e7d PW |
295 | { |
296 | add_flags |= SYMFILE_VERBOSE; | |
297 | add_flags |= SYMFILE_ALWAYS_CONFIRM; | |
298 | } | |
a2fedca9 PW |
299 | try |
300 | { | |
301 | symbol_file_add_main (exec_file_target.c_str (), add_flags); | |
302 | exec_file_attach (exec_file_target.c_str (), from_tty); | |
303 | } | |
304 | catch (gdb_exception_error &err) | |
305 | { | |
306 | warning (_("loading %ps %s"), | |
307 | styled_string (file_name_style.style (), | |
308 | exec_file_target.c_str ()), | |
309 | err.message != NULL ? err.what () : "error"); | |
310 | } | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | /* See gdbcore.h. */ | |
316 | ||
ecf45d2c SL |
317 | void |
318 | exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty) | |
319 | { | |
797bc1cb | 320 | char *exec_file_target; |
ecf45d2c SL |
321 | symfile_add_flags add_flags = 0; |
322 | ||
323 | /* Do nothing if we already have an executable filename. */ | |
324 | if (get_exec_file (0) != NULL) | |
325 | return; | |
326 | ||
327 | /* Try to determine a filename from the process itself. */ | |
328 | exec_file_target = target_pid_to_exec_file (pid); | |
329 | if (exec_file_target == NULL) | |
57d1de9c | 330 | { |
ecf45d2c SL |
331 | warning (_("No executable has been specified and target does not " |
332 | "support\n" | |
333 | "determining executable automatically. " | |
334 | "Try using the \"file\" command.")); | |
335 | return; | |
57d1de9c | 336 | } |
88178e82 | 337 | |
797bc1cb TT |
338 | gdb::unique_xmalloc_ptr<char> exec_file_host |
339 | = exec_file_find (exec_file_target, NULL); | |
ecf45d2c SL |
340 | |
341 | if (defer_bp_reset) | |
342 | add_flags |= SYMFILE_DEFER_BP_RESET; | |
343 | ||
344 | if (from_tty) | |
345 | add_flags |= SYMFILE_VERBOSE; | |
346 | ||
347 | /* Attempt to open the exec file. */ | |
797bc1cb | 348 | try_open_exec_file (exec_file_host.get (), current_inferior (), add_flags); |
a10de604 GB |
349 | } |
350 | ||
907083d1 | 351 | /* Set FILENAME as the new exec file. |
c906108c | 352 | |
c5aa993b JM |
353 | This function is intended to be behave essentially the same |
354 | as exec_file_command, except that the latter will detect when | |
355 | a target is being debugged, and will ask the user whether it | |
356 | should be shut down first. (If the answer is "no", then the | |
357 | new file is ignored.) | |
c906108c | 358 | |
c5aa993b JM |
359 | This file is used by exec_file_command, to do the work of opening |
360 | and processing the exec file after any prompting has happened. | |
c906108c | 361 | |
c5aa993b JM |
362 | And, it is used by child_attach, when the attach command was |
363 | given a pid but not a exec pathname, and the attach command could | |
364 | figure out the pathname from the pid. (In this case, we shouldn't | |
365 | ask the user whether the current target should be shut down -- | |
907083d1 | 366 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
367 | |
368 | void | |
5f08566b | 369 | exec_file_attach (const char *filename, int from_tty) |
c906108c | 370 | { |
7e10abd1 | 371 | /* First, acquire a reference to the exec_bfd. We release |
9b333ba3 TT |
372 | this at the end of the function; but acquiring it now lets the |
373 | BFD cache return it if this call refers to the same file. */ | |
7e10abd1 TT |
374 | gdb_bfd_ref_ptr exec_bfd_holder |
375 | = gdb_bfd_ref_ptr::new_reference (current_program_space->exec_bfd ()); | |
192b62ce | 376 | |
c906108c | 377 | /* Remove any previous exec file. */ |
8a4f1402 | 378 | current_program_space->exec_close (); |
c906108c SS |
379 | |
380 | /* Now open and digest the file the user requested, if any. */ | |
381 | ||
1adeb98a FN |
382 | if (!filename) |
383 | { | |
384 | if (from_tty) | |
a3f17187 | 385 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
386 | |
387 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
388 | } |
389 | else | |
c906108c | 390 | { |
64c0b5de | 391 | int load_via_target = 0; |
14278e1f | 392 | const char *scratch_pathname, *canonical_pathname; |
c906108c | 393 | int scratch_chan; |
d18b8b7a | 394 | char **matching; |
c5aa993b | 395 | |
64c0b5de GB |
396 | if (is_target_filename (filename)) |
397 | { | |
398 | if (target_filesystem_is_local ()) | |
399 | filename += strlen (TARGET_SYSROOT_PREFIX); | |
400 | else | |
401 | load_via_target = 1; | |
402 | } | |
403 | ||
14278e1f | 404 | gdb::unique_xmalloc_ptr<char> canonical_storage, scratch_storage; |
64c0b5de | 405 | if (load_via_target) |
c5aa993b | 406 | { |
64c0b5de GB |
407 | /* gdb_bfd_fopen does not support "target:" filenames. */ |
408 | if (write_files) | |
409 | warning (_("writing into executable files is " | |
410 | "not supported for %s sysroots"), | |
411 | TARGET_SYSROOT_PREFIX); | |
412 | ||
14278e1f | 413 | scratch_pathname = filename; |
64c0b5de | 414 | scratch_chan = -1; |
64c0b5de | 415 | canonical_pathname = scratch_pathname; |
c5aa993b | 416 | } |
64c0b5de GB |
417 | else |
418 | { | |
419 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
420 | filename, write_files ? | |
421 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, | |
e0cc99a6 | 422 | &scratch_storage); |
64c0b5de GB |
423 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
424 | if (scratch_chan < 0) | |
425 | { | |
96445f0b | 426 | int first_errno = errno; |
0ae1c716 | 427 | char *exename = (char *) alloca (strlen (filename) + 5); |
64c0b5de GB |
428 | |
429 | strcat (strcpy (exename, filename), ".exe"); | |
430 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
431 | exename, write_files ? | |
432 | O_RDWR | O_BINARY | |
433 | : O_RDONLY | O_BINARY, | |
e0cc99a6 | 434 | &scratch_storage); |
96445f0b HD |
435 | if (scratch_chan < 0) |
436 | errno = first_errno; | |
64c0b5de | 437 | } |
c906108c | 438 | #endif |
64c0b5de GB |
439 | if (scratch_chan < 0) |
440 | perror_with_name (filename); | |
a4453b7e | 441 | |
e0cc99a6 | 442 | scratch_pathname = scratch_storage.get (); |
a4453b7e | 443 | |
64c0b5de GB |
444 | /* gdb_bfd_open (and its variants) prefers canonicalized |
445 | pathname for better BFD caching. */ | |
14278e1f TT |
446 | canonical_storage = gdb_realpath (scratch_pathname); |
447 | canonical_pathname = canonical_storage.get (); | |
64c0b5de | 448 | } |
1f0c4988 | 449 | |
192b62ce | 450 | gdb_bfd_ref_ptr temp; |
64c0b5de | 451 | if (write_files && !load_via_target) |
192b62ce TT |
452 | temp = gdb_bfd_fopen (canonical_pathname, gnutarget, |
453 | FOPEN_RUB, scratch_chan); | |
1c00ec6b | 454 | else |
192b62ce | 455 | temp = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
19f6550e | 456 | current_program_space->set_exec_bfd (std::move (temp)); |
c906108c | 457 | |
7e10abd1 | 458 | if (!current_program_space->exec_bfd ()) |
9fe4a216 | 459 | { |
a2fedca9 PW |
460 | error (_("\"%ps\": could not open as an executable file: %s."), |
461 | styled_string (file_name_style.style (), scratch_pathname), | |
462 | bfd_errmsg (bfd_get_error ())); | |
9fe4a216 | 463 | } |
c906108c | 464 | |
64c0b5de GB |
465 | /* gdb_realpath_keepfile resolves symlinks on the local |
466 | filesystem and so cannot be used for "target:" files. */ | |
c20cb686 | 467 | gdb_assert (current_program_space->exec_filename == nullptr); |
64c0b5de | 468 | if (load_via_target) |
c20cb686 | 469 | current_program_space->exec_filename |
7e10abd1 TT |
470 | = (make_unique_xstrdup |
471 | (bfd_get_filename (current_program_space->exec_bfd ()))); | |
64c0b5de | 472 | else |
c20cb686 TT |
473 | current_program_space->exec_filename |
474 | = gdb_realpath_keepfile (scratch_pathname); | |
1f0c4988 | 475 | |
7e10abd1 TT |
476 | if (!bfd_check_format_matches (current_program_space->exec_bfd (), |
477 | bfd_object, &matching)) | |
c906108c SS |
478 | { |
479 | /* Make sure to close exec_bfd, or else "run" might try to use | |
480 | it. */ | |
8a4f1402 | 481 | current_program_space->exec_close (); |
a2fedca9 PW |
482 | error (_("\"%ps\": not in executable format: %s"), |
483 | styled_string (file_name_style.style (), scratch_pathname), | |
803c08d0 | 484 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); |
c906108c SS |
485 | } |
486 | ||
7e10abd1 TT |
487 | target_section_table sections |
488 | = build_section_table (current_program_space->exec_bfd ()); | |
c906108c | 489 | |
7e10abd1 TT |
490 | current_program_space->ebfd_mtime |
491 | = bfd_get_mtime (current_program_space->exec_bfd ()); | |
c04ea773 | 492 | |
c906108c SS |
493 | validate_files (); |
494 | ||
7e10abd1 | 495 | set_gdbarch_from_file (current_program_space->exec_bfd ()); |
c906108c | 496 | |
07b82ea5 | 497 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
498 | list of sections. This possibly pushes the exec_ops |
499 | target. */ | |
7e10abd1 | 500 | add_target_sections (¤t_program_space->ebfd, sections); |
c906108c SS |
501 | |
502 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
503 | if (deprecated_exec_file_display_hook) |
504 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 505 | } |
9b333ba3 | 506 | |
ce7d4522 | 507 | bfd_cache_close_all (); |
76727919 | 508 | gdb::observers::executable_changed.notify (); |
c906108c SS |
509 | } |
510 | ||
511 | /* Process the first arg in ARGS as the new exec file. | |
512 | ||
c5aa993b JM |
513 | Note that we have to explicitly ignore additional args, since we can |
514 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
515 | which can take multiple args. |
516 | ||
0963b4bd | 517 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 518 | |
1adeb98a | 519 | static void |
1d8b34a7 | 520 | exec_file_command (const char *args, int from_tty) |
c906108c | 521 | { |
55f6301a | 522 | if (from_tty && target_has_execution () |
4c42eaff DJ |
523 | && !query (_("A program is being debugged already.\n" |
524 | "Are you sure you want to change the file? "))) | |
525 | error (_("File not changed.")); | |
1adeb98a FN |
526 | |
527 | if (args) | |
528 | { | |
529 | /* Scan through the args and pick up the first non option arg | |
530 | as the filename. */ | |
531 | ||
773a1edc TT |
532 | gdb_argv built_argv (args); |
533 | char **argv = built_argv.get (); | |
1adeb98a FN |
534 | |
535 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
536 | {; | |
537 | } | |
538 | if (*argv == NULL) | |
8a3fe4f8 | 539 | error (_("No executable file name was specified")); |
1adeb98a | 540 | |
773a1edc TT |
541 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (*argv)); |
542 | exec_file_attach (filename.get (), from_tty); | |
1adeb98a FN |
543 | } |
544 | else | |
545 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
546 | } |
547 | ||
0963b4bd | 548 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
549 | What a novelty. Why did GDB go through four major releases before this |
550 | command was added? */ | |
551 | ||
552 | static void | |
1d8b34a7 | 553 | file_command (const char *arg, int from_tty) |
c906108c SS |
554 | { |
555 | /* FIXME, if we lose on reading the symbol file, we should revert | |
556 | the exec file, but that's rough. */ | |
557 | exec_file_command (arg, from_tty); | |
558 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
559 | if (deprecated_file_changed_hook) |
560 | deprecated_file_changed_hook (arg); | |
c906108c | 561 | } |
c906108c | 562 | \f |
c5aa993b | 563 | |
2d128614 | 564 | /* Builds a section table, given args BFD, TABLE. */ |
c906108c | 565 | |
2d128614 TT |
566 | target_section_table |
567 | build_section_table (struct bfd *some_bfd) | |
c906108c | 568 | { |
2d128614 TT |
569 | target_section_table table; |
570 | ||
8a6bb1d1 TT |
571 | for (asection *asect : gdb_bfd_sections (some_bfd)) |
572 | { | |
573 | flagword aflag; | |
574 | ||
575 | /* Check the section flags, but do not discard zero-length | |
576 | sections, since some symbols may still be attached to this | |
577 | section. For instance, we encountered on sparc-solaris 2.10 | |
578 | a shared library with an empty .bss section to which a symbol | |
579 | named "_end" was attached. The address of this symbol still | |
580 | needs to be relocated. */ | |
581 | aflag = bfd_section_flags (asect); | |
582 | if (!(aflag & SEC_ALLOC)) | |
583 | continue; | |
584 | ||
6be2a9ab TT |
585 | table.emplace_back (bfd_section_vma (asect), |
586 | bfd_section_vma (asect) + bfd_section_size (asect), | |
587 | asect); | |
8a6bb1d1 | 588 | } |
e2ff18a0 | 589 | |
2d128614 | 590 | return table; |
c906108c | 591 | } |
07b82ea5 PA |
592 | |
593 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
594 | current set of target sections. */ | |
595 | ||
596 | void | |
046ac79f | 597 | add_target_sections (void *owner, |
bb2a6777 | 598 | const target_section_table §ions) |
07b82ea5 | 599 | { |
b55221ab | 600 | target_section_table *table = ¤t_program_space->target_sections; |
07b82ea5 | 601 | |
d7a78e5c | 602 | if (!sections.empty ()) |
07b82ea5 | 603 | { |
d7a78e5c | 604 | for (const target_section &s : sections) |
ed9eebaf | 605 | { |
d7a78e5c TT |
606 | table->push_back (s); |
607 | table->back ().owner = owner; | |
ed9eebaf | 608 | } |
07b82ea5 | 609 | |
53af73bf | 610 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f PA |
611 | program_space *curr_pspace = current_program_space; |
612 | ||
07b82ea5 | 613 | /* If these are the first file sections we can provide memory |
5b6d1e4f PA |
614 | from, push the file_stratum target. Must do this in all |
615 | inferiors sharing the program space. */ | |
616 | for (inferior *inf : all_inferiors ()) | |
617 | { | |
618 | if (inf->pspace != curr_pspace) | |
619 | continue; | |
620 | ||
621 | if (inf->target_is_pushed (&exec_ops)) | |
622 | continue; | |
623 | ||
624 | switch_to_inferior_no_thread (inf); | |
625 | push_target (&exec_ops); | |
626 | } | |
07b82ea5 PA |
627 | } |
628 | } | |
629 | ||
76ad5e1e NB |
630 | /* Add the sections of OBJFILE to the current set of target sections. */ |
631 | ||
632 | void | |
633 | add_target_sections_of_objfile (struct objfile *objfile) | |
634 | { | |
b55221ab | 635 | target_section_table *table = ¤t_program_space->target_sections; |
76ad5e1e | 636 | struct obj_section *osect; |
76ad5e1e | 637 | |
91840ee3 | 638 | gdb_assert (objfile != nullptr); |
76ad5e1e NB |
639 | |
640 | /* Compute the number of sections to add. */ | |
76ad5e1e NB |
641 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
642 | { | |
fd361982 | 643 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
644 | continue; |
645 | ||
6be2a9ab TT |
646 | table->emplace_back (obj_section_addr (osect), |
647 | obj_section_endaddr (osect), | |
648 | osect->the_bfd_section, (void *) objfile); | |
76ad5e1e NB |
649 | } |
650 | } | |
651 | ||
046ac79f JK |
652 | /* Remove all target sections owned by OWNER. |
653 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
654 | |
655 | void | |
046ac79f | 656 | remove_target_sections (void *owner) |
07b82ea5 | 657 | { |
b55221ab | 658 | target_section_table *table = ¤t_program_space->target_sections; |
07b82ea5 | 659 | |
046ac79f JK |
660 | gdb_assert (owner != NULL); |
661 | ||
d7a78e5c TT |
662 | auto it = std::remove_if (table->begin (), |
663 | table->end (), | |
bb2a6777 TT |
664 | [&] (target_section §) |
665 | { | |
666 | return sect.owner == owner; | |
667 | }); | |
d7a78e5c | 668 | table->erase (it, table->end ()); |
bb2a6777 TT |
669 | |
670 | /* If we don't have any more sections to read memory from, | |
671 | remove the file_stratum target from the stack of each | |
672 | inferior sharing the program space. */ | |
d7a78e5c | 673 | if (table->empty ()) |
07b82ea5 | 674 | { |
bb2a6777 TT |
675 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
676 | program_space *curr_pspace = current_program_space; | |
07b82ea5 | 677 | |
bb2a6777 | 678 | for (inferior *inf : all_inferiors ()) |
6c95b8df | 679 | { |
bb2a6777 TT |
680 | if (inf->pspace != curr_pspace) |
681 | continue; | |
6c95b8df | 682 | |
d7a78e5c | 683 | if (!inf->pspace->target_sections.empty ()) |
bb2a6777 | 684 | continue; |
6c95b8df | 685 | |
bb2a6777 TT |
686 | switch_to_inferior_no_thread (inf); |
687 | unpush_target (&exec_ops); | |
6c95b8df | 688 | } |
07b82ea5 PA |
689 | } |
690 | } | |
691 | ||
5b6d1e4f PA |
692 | /* See exec.h. */ |
693 | ||
694 | void | |
695 | exec_on_vfork () | |
696 | { | |
d7a78e5c | 697 | if (!current_program_space->target_sections.empty ()) |
5b6d1e4f PA |
698 | push_target (&exec_ops); |
699 | } | |
700 | ||
c906108c | 701 | \f |
348f8c02 | 702 | |
1ca49d37 YQ |
703 | enum target_xfer_status |
704 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
705 | ULONGEST len, ULONGEST *xfered_len) | |
706 | { | |
707 | /* It's unduly pedantic to refuse to look at the executable for | |
708 | read-only pieces; so do the equivalent of readonly regions aka | |
709 | QTro packet. */ | |
7e10abd1 | 710 | if (current_program_space->exec_bfd () != NULL) |
1ca49d37 YQ |
711 | { |
712 | asection *s; | |
713 | bfd_size_type size; | |
714 | bfd_vma vma; | |
715 | ||
7e10abd1 | 716 | for (s = current_program_space->exec_bfd ()->sections; s; s = s->next) |
1ca49d37 YQ |
717 | { |
718 | if ((s->flags & SEC_LOAD) == 0 | |
719 | || (s->flags & SEC_READONLY) == 0) | |
720 | continue; | |
721 | ||
722 | vma = s->vma; | |
fd361982 | 723 | size = bfd_section_size (s); |
1ca49d37 YQ |
724 | if (vma <= offset && offset < (vma + size)) |
725 | { | |
726 | ULONGEST amt; | |
727 | ||
728 | amt = (vma + size) - offset; | |
729 | if (amt > len) | |
730 | amt = len; | |
731 | ||
7e10abd1 | 732 | amt = bfd_get_section_contents (current_program_space->exec_bfd (), s, |
1ca49d37 YQ |
733 | readbuf, offset - vma, amt); |
734 | ||
735 | if (amt == 0) | |
736 | return TARGET_XFER_EOF; | |
737 | else | |
738 | { | |
739 | *xfered_len = amt; | |
740 | return TARGET_XFER_OK; | |
741 | } | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
746 | /* Indicate failure to find the requested memory block. */ | |
747 | return TARGET_XFER_E_IO; | |
748 | } | |
749 | ||
a79b1bc6 | 750 | /* Return all read-only memory ranges found in the target section |
5a2eb0ef | 751 | table defined by SECTIONS and SECTIONS_END, starting at (and |
a79b1bc6 | 752 | intersected with) MEMADDR for LEN bytes. */ |
5a2eb0ef | 753 | |
a79b1bc6 SM |
754 | static std::vector<mem_range> |
755 | section_table_available_memory (CORE_ADDR memaddr, ULONGEST len, | |
bb2a6777 | 756 | const target_section_table §ions) |
e6ca34fc | 757 | { |
a79b1bc6 | 758 | std::vector<mem_range> memory; |
e6ca34fc | 759 | |
d7a78e5c | 760 | for (const target_section &p : sections) |
e6ca34fc | 761 | { |
bb2a6777 | 762 | if ((bfd_section_flags (p.the_bfd_section) & SEC_READONLY) == 0) |
e6ca34fc PA |
763 | continue; |
764 | ||
765 | /* Copy the meta-data, adjusted. */ | |
bb2a6777 | 766 | if (mem_ranges_overlap (p.addr, p.endaddr - p.addr, memaddr, len)) |
e6ca34fc PA |
767 | { |
768 | ULONGEST lo1, hi1, lo2, hi2; | |
e6ca34fc PA |
769 | |
770 | lo1 = memaddr; | |
771 | hi1 = memaddr + len; | |
772 | ||
bb2a6777 TT |
773 | lo2 = p.addr; |
774 | hi2 = p.endaddr; | |
e6ca34fc | 775 | |
a79b1bc6 SM |
776 | CORE_ADDR start = std::max (lo1, lo2); |
777 | int length = std::min (hi1, hi2) - start; | |
e6ca34fc | 778 | |
a79b1bc6 | 779 | memory.emplace_back (start, length); |
e6ca34fc PA |
780 | } |
781 | } | |
782 | ||
783 | return memory; | |
784 | } | |
785 | ||
1ee79381 YQ |
786 | enum target_xfer_status |
787 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
788 | ULONGEST len, ULONGEST *xfered_len) | |
789 | { | |
a79b1bc6 SM |
790 | target_section_table *table = target_get_section_table (&exec_ops); |
791 | std::vector<mem_range> available_memory | |
bb2a6777 | 792 | = section_table_available_memory (offset, len, *table); |
1ee79381 | 793 | |
a79b1bc6 | 794 | normalize_mem_ranges (&available_memory); |
1ee79381 | 795 | |
a79b1bc6 | 796 | for (const mem_range &r : available_memory) |
1ee79381 | 797 | { |
a79b1bc6 | 798 | if (mem_ranges_overlap (r.start, r.length, offset, len)) |
1ee79381 YQ |
799 | { |
800 | CORE_ADDR end; | |
801 | enum target_xfer_status status; | |
802 | ||
803 | /* Get the intersection window. */ | |
a79b1bc6 | 804 | end = std::min<CORE_ADDR> (offset + len, r.start + r.length); |
1ee79381 YQ |
805 | |
806 | gdb_assert (end - offset <= len); | |
807 | ||
a79b1bc6 | 808 | if (offset >= r.start) |
1ee79381 YQ |
809 | status = exec_read_partial_read_only (readbuf, offset, |
810 | end - offset, | |
811 | xfered_len); | |
812 | else | |
813 | { | |
a79b1bc6 | 814 | *xfered_len = r.start - offset; |
bc113b4e | 815 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 | 816 | } |
1ee79381 YQ |
817 | return status; |
818 | } | |
819 | } | |
1ee79381 YQ |
820 | |
821 | *xfered_len = len; | |
bc113b4e | 822 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
823 | } |
824 | ||
9b409511 | 825 | enum target_xfer_status |
07b82ea5 | 826 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 827 | ULONGEST offset, ULONGEST len, |
9b409511 | 828 | ULONGEST *xfered_len, |
bb2a6777 | 829 | const target_section_table §ions, |
e56cb451 KB |
830 | gdb::function_view<bool |
831 | (const struct target_section *)> match_cb) | |
c906108c | 832 | { |
020cc13c | 833 | int res; |
07b82ea5 PA |
834 | ULONGEST memaddr = offset; |
835 | ULONGEST memend = memaddr + len; | |
c906108c | 836 | |
e2ff18a0 | 837 | gdb_assert (len != 0); |
c906108c | 838 | |
d7a78e5c | 839 | for (const target_section &p : sections) |
c906108c | 840 | { |
bb2a6777 | 841 | struct bfd_section *asect = p.the_bfd_section; |
2b2848e2 DE |
842 | bfd *abfd = asect->owner; |
843 | ||
bb2a6777 | 844 | if (match_cb != nullptr && !match_cb (&p)) |
0963b4bd | 845 | continue; /* not the section we need. */ |
bb2a6777 | 846 | if (memaddr >= p.addr) |
3db26b01 | 847 | { |
bb2a6777 | 848 | if (memend <= p.endaddr) |
3db26b01 JB |
849 | { |
850 | /* Entire transfer is within this section. */ | |
07b82ea5 | 851 | if (writebuf) |
2b2848e2 | 852 | res = bfd_set_section_contents (abfd, asect, |
bb2a6777 | 853 | writebuf, memaddr - p.addr, |
85302095 AC |
854 | len); |
855 | else | |
2b2848e2 | 856 | res = bfd_get_section_contents (abfd, asect, |
bb2a6777 | 857 | readbuf, memaddr - p.addr, |
85302095 | 858 | len); |
9b409511 YQ |
859 | |
860 | if (res != 0) | |
861 | { | |
862 | *xfered_len = len; | |
863 | return TARGET_XFER_OK; | |
864 | } | |
865 | else | |
866 | return TARGET_XFER_EOF; | |
3db26b01 | 867 | } |
bb2a6777 | 868 | else if (memaddr >= p.endaddr) |
3db26b01 JB |
869 | { |
870 | /* This section ends before the transfer starts. */ | |
871 | continue; | |
872 | } | |
873 | else | |
874 | { | |
875 | /* This section overlaps the transfer. Just do half. */ | |
bb2a6777 | 876 | len = p.endaddr - memaddr; |
07b82ea5 | 877 | if (writebuf) |
2b2848e2 | 878 | res = bfd_set_section_contents (abfd, asect, |
bb2a6777 | 879 | writebuf, memaddr - p.addr, |
85302095 AC |
880 | len); |
881 | else | |
2b2848e2 | 882 | res = bfd_get_section_contents (abfd, asect, |
bb2a6777 | 883 | readbuf, memaddr - p.addr, |
85302095 | 884 | len); |
9b409511 YQ |
885 | if (res != 0) |
886 | { | |
887 | *xfered_len = len; | |
888 | return TARGET_XFER_OK; | |
889 | } | |
890 | else | |
891 | return TARGET_XFER_EOF; | |
3db26b01 JB |
892 | } |
893 | } | |
c906108c SS |
894 | } |
895 | ||
9b409511 | 896 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 897 | } |
348f8c02 | 898 | |
d7a78e5c | 899 | target_section_table * |
f6ac5f3d | 900 | exec_target::get_section_table () |
348f8c02 | 901 | { |
b55221ab | 902 | return ¤t_program_space->target_sections; |
348f8c02 PA |
903 | } |
904 | ||
f6ac5f3d PA |
905 | enum target_xfer_status |
906 | exec_target::xfer_partial (enum target_object object, | |
907 | const char *annex, gdb_byte *readbuf, | |
908 | const gdb_byte *writebuf, | |
909 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
348f8c02 | 910 | { |
d7a78e5c | 911 | target_section_table *table = get_section_table (); |
07b82ea5 PA |
912 | |
913 | if (object == TARGET_OBJECT_MEMORY) | |
914 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 915 | offset, len, xfered_len, |
bb2a6777 | 916 | *table); |
07b82ea5 | 917 | else |
2ed4b548 | 918 | return TARGET_XFER_E_IO; |
348f8c02 | 919 | } |
c906108c | 920 | \f |
c5aa993b | 921 | |
c906108c | 922 | void |
d7a78e5c | 923 | print_section_info (target_section_table *t, bfd *abfd) |
c906108c | 924 | { |
5af949e3 | 925 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
17a912b6 | 926 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 927 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 928 | |
a2fedca9 PW |
929 | printf_filtered ("\t`%ps', ", |
930 | styled_string (file_name_style.style (), | |
931 | bfd_get_filename (abfd))); | |
c906108c | 932 | wrap_here (" "); |
a3f17187 | 933 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
7e10abd1 | 934 | if (abfd == current_program_space->exec_bfd ()) |
51bee8e9 | 935 | { |
3e43a32a MS |
936 | /* gcc-3.4 does not like the initialization in |
937 | <p == t->sections_end>. */ | |
d904de5b | 938 | bfd_vma displacement = 0; |
2f1bdd26 | 939 | bfd_vma entry_point; |
bb2a6777 | 940 | bool found = false; |
51bee8e9 | 941 | |
d7a78e5c | 942 | for (const target_section &p : *t) |
51bee8e9 | 943 | { |
bb2a6777 | 944 | struct bfd_section *psect = p.the_bfd_section; |
51bee8e9 | 945 | |
fd361982 | 946 | if ((bfd_section_flags (psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
947 | != (SEC_ALLOC | SEC_LOAD)) |
948 | continue; | |
949 | ||
fd361982 AM |
950 | if (bfd_section_vma (psect) <= abfd->start_address |
951 | && abfd->start_address < (bfd_section_vma (psect) | |
952 | + bfd_section_size (psect))) | |
51bee8e9 | 953 | { |
bb2a6777 TT |
954 | displacement = p.addr - bfd_section_vma (psect); |
955 | found = true; | |
51bee8e9 JK |
956 | break; |
957 | } | |
958 | } | |
bb2a6777 | 959 | if (!found) |
a2fedca9 PW |
960 | warning (_("Cannot find section for the entry point of %ps."), |
961 | styled_string (file_name_style.style (), | |
962 | bfd_get_filename (abfd))); | |
51bee8e9 | 963 | |
2f1bdd26 MGD |
964 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
965 | bfd_get_start_address (abfd) | |
966 | + displacement); | |
51bee8e9 | 967 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 968 | paddress (gdbarch, entry_point)); |
51bee8e9 | 969 | } |
d7a78e5c | 970 | for (const target_section &p : *t) |
c906108c | 971 | { |
bb2a6777 | 972 | struct bfd_section *psect = p.the_bfd_section; |
2b2848e2 DE |
973 | bfd *pbfd = psect->owner; |
974 | ||
bb2a6777 TT |
975 | printf_filtered ("\t%s", hex_string_custom (p.addr, wid)); |
976 | printf_filtered (" - %s", hex_string_custom (p.endaddr, wid)); | |
bcf16802 KB |
977 | |
978 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
979 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
980 | since most output will then be much wider than necessary. It | |
981 | may make sense to test the size of the file and choose the | |
982 | format string accordingly. */ | |
a3f17187 | 983 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
984 | if (info_verbose) |
985 | printf_filtered (" @ %s", | |
2b2848e2 | 986 | hex_string_custom (psect->filepos, 8)); |
fd361982 | 987 | printf_filtered (" is %s", bfd_section_name (psect)); |
2b2848e2 | 988 | if (pbfd != abfd) |
a2fedca9 PW |
989 | printf_filtered (" in %ps", |
990 | styled_string (file_name_style.style (), | |
991 | bfd_get_filename (pbfd))); | |
c906108c SS |
992 | printf_filtered ("\n"); |
993 | } | |
994 | } | |
995 | ||
f6ac5f3d PA |
996 | void |
997 | exec_target::files_info () | |
c906108c | 998 | { |
7e10abd1 TT |
999 | if (current_program_space->exec_bfd ()) |
1000 | print_section_info (¤t_program_space->target_sections, | |
1001 | current_program_space->exec_bfd ()); | |
57008375 JK |
1002 | else |
1003 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
1004 | } |
1005 | ||
1006 | static void | |
0b39b52e | 1007 | set_section_command (const char *args, int from_tty) |
c906108c | 1008 | { |
0b39b52e | 1009 | const char *secname; |
c906108c SS |
1010 | unsigned seclen; |
1011 | unsigned long secaddr; | |
1012 | char secprint[100]; | |
1013 | long offset; | |
1014 | ||
1015 | if (args == 0) | |
8a3fe4f8 | 1016 | error (_("Must specify section name and its virtual address")); |
c906108c | 1017 | |
0963b4bd | 1018 | /* Parse out section name. */ |
c5aa993b | 1019 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
1020 | seclen = args - secname; |
1021 | ||
0963b4bd | 1022 | /* Parse out new virtual address. */ |
c906108c SS |
1023 | secaddr = parse_and_eval_address (args); |
1024 | ||
b55221ab | 1025 | for (target_section &p : current_program_space->target_sections) |
c5aa993b | 1026 | { |
bb2a6777 TT |
1027 | if (!strncmp (secname, bfd_section_name (p.the_bfd_section), seclen) |
1028 | && bfd_section_name (p.the_bfd_section)[seclen] == '\0') | |
c5aa993b | 1029 | { |
bb2a6777 TT |
1030 | offset = secaddr - p.addr; |
1031 | p.addr += offset; | |
1032 | p.endaddr += offset; | |
c5aa993b | 1033 | if (from_tty) |
f6ac5f3d | 1034 | exec_ops.files_info (); |
c5aa993b JM |
1035 | return; |
1036 | } | |
c906108c | 1037 | } |
c906108c SS |
1038 | if (seclen >= sizeof (secprint)) |
1039 | seclen = sizeof (secprint) - 1; | |
1040 | strncpy (secprint, secname, seclen); | |
1041 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 1042 | error (_("Section %s not found"), secprint); |
c906108c SS |
1043 | } |
1044 | ||
30510692 DJ |
1045 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
1046 | it to ADDRESS. */ | |
c1bd25fd DJ |
1047 | |
1048 | void | |
1049 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
1050 | { | |
b55221ab | 1051 | for (target_section &p : current_program_space->target_sections) |
c1bd25fd | 1052 | { |
c7e97679 | 1053 | if (filename_cmp (filename, |
bb2a6777 TT |
1054 | bfd_get_filename (p.the_bfd_section->owner)) == 0 |
1055 | && index == p.the_bfd_section->index) | |
c1bd25fd | 1056 | { |
bb2a6777 TT |
1057 | p.endaddr += address - p.addr; |
1058 | p.addr = address; | |
c1bd25fd DJ |
1059 | } |
1060 | } | |
1061 | } | |
1062 | ||
57810aa7 | 1063 | bool |
f6ac5f3d | 1064 | exec_target::has_memory () |
c35b1492 PA |
1065 | { |
1066 | /* We can provide memory if we have any file/target sections to read | |
1067 | from. */ | |
b55221ab | 1068 | return !current_program_space->target_sections.empty (); |
c35b1492 PA |
1069 | } |
1070 | ||
24f5300a | 1071 | gdb::unique_xmalloc_ptr<char> |
f6ac5f3d | 1072 | exec_target::make_corefile_notes (bfd *obfd, int *note_size) |
83814951 TT |
1073 | { |
1074 | error (_("Can't create a corefile")); | |
1075 | } | |
be4d1333 | 1076 | |
f6ac5f3d PA |
1077 | int |
1078 | exec_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
c906108c | 1079 | { |
f6ac5f3d | 1080 | return objfile_find_memory_regions (this, func, data); |
c906108c SS |
1081 | } |
1082 | ||
6c265988 | 1083 | void _initialize_exec (); |
c906108c | 1084 | void |
6c265988 | 1085 | _initialize_exec () |
c906108c SS |
1086 | { |
1087 | struct cmd_list_element *c; | |
1088 | ||
c906108c SS |
1089 | if (!dbx_commands) |
1090 | { | |
1a966eab AC |
1091 | c = add_cmd ("file", class_files, file_command, _("\ |
1092 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
1093 | It is read for its symbols, for getting the contents of pure memory,\n\ |
1094 | and it is the program executed when you use the `run' command.\n\ | |
1095 | If FILE cannot be found as specified, your execution directory path\n\ | |
1096 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 1097 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 1098 | set_cmd_completer (c, filename_completer); |
c906108c SS |
1099 | } |
1100 | ||
1a966eab AC |
1101 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
1102 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
1103 | If FILE cannot be found as specified, your execution directory path\n\ |
1104 | is searched for a command of that name.\n\ | |
1a966eab | 1105 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 1106 | set_cmd_completer (c, filename_completer); |
c906108c | 1107 | |
1bedd215 AC |
1108 | add_com ("section", class_files, set_section_command, _("\ |
1109 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1110 | This can be used if the exec file does not contain section addresses,\n\ |
1111 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1112 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1113 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1114 | |
5bf193a2 AC |
1115 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1116 | Set writing into executable and core files."), _("\ | |
1117 | Show writing into executable and core files."), NULL, | |
1118 | NULL, | |
920d2a44 | 1119 | show_write_files, |
5bf193a2 | 1120 | &setlist, &showlist); |
c5aa993b | 1121 | |
a2fedca9 PW |
1122 | add_setshow_enum_cmd ("exec-file-mismatch", class_support, |
1123 | exec_file_mismatch_names, | |
1124 | &exec_file_mismatch, | |
1125 | _("\ | |
1126 | Set exec-file-mismatch handling (ask|warn|off)."), | |
1127 | _("\ | |
1128 | Show exec-file-mismatch handling (ask|warn|off)."), | |
1129 | _("\ | |
98c59b52 PA |
1130 | Specifies how to handle a mismatch between the current exec-file\n\ |
1131 | loaded by GDB and the exec-file automatically determined when attaching\n\ | |
a2fedca9 PW |
1132 | to a process:\n\n\ |
1133 | ask - warn the user and ask whether to load the determined exec-file.\n\ | |
1134 | warn - warn the user, but do not change the exec-file.\n\ | |
0a278aa7 PW |
1135 | off - do not check for mismatch.\n\ |
1136 | \n\ | |
1137 | GDB detects a mismatch by comparing the build IDs of the files.\n\ | |
1138 | If the user confirms loading the determined exec-file, then its symbols\n\ | |
1139 | will be loaded as well."), | |
a2fedca9 PW |
1140 | set_exec_file_mismatch_command, |
1141 | show_exec_file_mismatch_command, | |
1142 | &setlist, &showlist); | |
1143 | ||
d9f719f1 | 1144 | add_target (exec_target_info, exec_target_open, filename_completer); |
c906108c | 1145 | } |