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; | |
78 | struct target_section_table *get_section_table () override; | |
79 | void files_info () override; | |
80 | ||
57810aa7 | 81 | bool has_memory () override; |
f6ac5f3d PA |
82 | char *make_corefile_notes (bfd *, int *) override; |
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 | ||
07b82ea5 PA |
151 | /* Close and clear exec_bfd. If we end up with no target sections to |
152 | read memory from, this unpushes the exec_ops target. */ | |
153 | ||
6c95b8df PA |
154 | void |
155 | exec_close (void) | |
07b82ea5 PA |
156 | { |
157 | if (exec_bfd) | |
158 | { | |
159 | bfd *abfd = exec_bfd; | |
07b82ea5 | 160 | |
cbb099e8 | 161 | gdb_bfd_unref (abfd); |
07b82ea5 PA |
162 | |
163 | /* Removing target sections may close the exec_ops target. | |
164 | Clear exec_bfd before doing so to prevent recursion. */ | |
165 | exec_bfd = NULL; | |
166 | exec_bfd_mtime = 0; | |
167 | ||
046ac79f | 168 | remove_target_sections (&exec_bfd); |
1f0c4988 JK |
169 | |
170 | xfree (exec_filename); | |
171 | exec_filename = NULL; | |
07b82ea5 PA |
172 | } |
173 | } | |
174 | ||
6c95b8df PA |
175 | /* This is the target_close implementation. Clears all target |
176 | sections and closes all executable bfds from all program spaces. */ | |
177 | ||
f6ac5f3d PA |
178 | void |
179 | exec_target::close () | |
c906108c | 180 | { |
5ed8105e | 181 | scoped_restore_current_program_space restore_pspace; |
6c95b8df | 182 | |
94c93c35 | 183 | for (struct program_space *ss : program_spaces) |
5ed8105e PA |
184 | { |
185 | set_current_program_space (ss); | |
186 | clear_section_table (current_target_sections); | |
187 | exec_close (); | |
188 | } | |
c906108c SS |
189 | } |
190 | ||
f6ac5f3d | 191 | /* See gdbcore.h. */ |
a10de604 GB |
192 | |
193 | void | |
ecf45d2c SL |
194 | try_open_exec_file (const char *exec_file_host, struct inferior *inf, |
195 | symfile_add_flags add_flags) | |
a10de604 | 196 | { |
cc06b668 | 197 | struct gdb_exception prev_err; |
a10de604 | 198 | |
57d1de9c LM |
199 | /* exec_file_attach and symbol_file_add_main may throw an error if the file |
200 | cannot be opened either locally or remotely. | |
201 | ||
202 | This happens for example, when the file is first found in the local | |
203 | sysroot (above), and then disappears (a TOCTOU race), or when it doesn't | |
204 | exist in the target filesystem, or when the file does exist, but | |
205 | is not readable. | |
88178e82 | 206 | |
57d1de9c LM |
207 | Even without a symbol file, the remote-based debugging session should |
208 | continue normally instead of ending abruptly. Hence we catch thrown | |
209 | errors/exceptions in the following code. */ | |
a70b8144 | 210 | try |
57d1de9c | 211 | { |
ecf45d2c SL |
212 | /* We must do this step even if exec_file_host is NULL, so that |
213 | exec_file_attach will clear state. */ | |
214 | exec_file_attach (exec_file_host, add_flags & SYMFILE_VERBOSE); | |
57d1de9c | 215 | } |
94aeb44b | 216 | catch (gdb_exception_error &err) |
57d1de9c LM |
217 | { |
218 | if (err.message != NULL) | |
3d6e9d23 | 219 | warning ("%s", err.what ()); |
57d1de9c | 220 | |
94aeb44b | 221 | prev_err = std::move (err); |
57d1de9c | 222 | } |
57d1de9c | 223 | |
ecf45d2c | 224 | if (exec_file_host != NULL) |
57d1de9c | 225 | { |
a70b8144 | 226 | try |
ecf45d2c SL |
227 | { |
228 | symbol_file_add_main (exec_file_host, add_flags); | |
229 | } | |
230d2906 | 230 | catch (const gdb_exception_error &err) |
ecf45d2c SL |
231 | { |
232 | if (!exception_print_same (prev_err, err)) | |
3d6e9d23 | 233 | warning ("%s", err.what ()); |
ecf45d2c | 234 | } |
57d1de9c | 235 | } |
ecf45d2c SL |
236 | } |
237 | ||
238 | /* See gdbcore.h. */ | |
239 | ||
a2fedca9 PW |
240 | void |
241 | validate_exec_file (int from_tty) | |
242 | { | |
243 | /* If user asked to ignore the mismatch, do nothing. */ | |
244 | if (exec_file_mismatch_mode == exec_file_mismatch_off) | |
245 | return; | |
246 | ||
247 | const char *current_exec_file = get_exec_file (0); | |
248 | struct inferior *inf = current_inferior (); | |
249 | /* Try to determine a filename from the process itself. */ | |
250 | const char *pid_exec_file = target_pid_to_exec_file (inf->pid); | |
98c59b52 | 251 | bool build_id_mismatch = false; |
a2fedca9 | 252 | |
98c59b52 | 253 | /* If we cannot validate the exec file, return. */ |
a2fedca9 PW |
254 | if (current_exec_file == NULL || pid_exec_file == NULL) |
255 | return; | |
256 | ||
98c59b52 PA |
257 | /* Try validating via build-id, if available. This is the most |
258 | reliable check. */ | |
259 | const bfd_build_id *exec_file_build_id = build_id_bfd_get (exec_bfd); | |
260 | if (exec_file_build_id != nullptr) | |
261 | { | |
262 | /* Prepend the target prefix, to force gdb_bfd_open to open the | |
263 | file on the remote file system (if indeed remote). */ | |
264 | std::string target_pid_exec_file | |
265 | = std::string (TARGET_SYSROOT_PREFIX) + pid_exec_file; | |
266 | ||
267 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (target_pid_exec_file.c_str (), | |
268 | gnutarget, -1, false)); | |
269 | if (abfd != nullptr) | |
270 | { | |
271 | const bfd_build_id *target_exec_file_build_id | |
272 | = build_id_bfd_get (abfd.get ()); | |
a2fedca9 | 273 | |
98c59b52 PA |
274 | if (target_exec_file_build_id != nullptr) |
275 | { | |
276 | if (exec_file_build_id->size == target_exec_file_build_id->size | |
277 | && memcmp (exec_file_build_id->data, | |
278 | target_exec_file_build_id->data, | |
279 | exec_file_build_id->size) == 0) | |
280 | { | |
281 | /* Match. */ | |
282 | return; | |
283 | } | |
284 | else | |
285 | build_id_mismatch = true; | |
286 | } | |
287 | } | |
288 | } | |
a2fedca9 | 289 | |
98c59b52 | 290 | if (build_id_mismatch) |
a2fedca9 | 291 | { |
98c59b52 PA |
292 | std::string exec_file_target (pid_exec_file); |
293 | ||
294 | /* In case the exec file is not local, exec_file_target has to point at | |
295 | the target file system. */ | |
296 | if (is_target_filename (current_exec_file) && !target_filesystem_is_local ()) | |
297 | exec_file_target = TARGET_SYSROOT_PREFIX + exec_file_target; | |
298 | ||
a2fedca9 PW |
299 | warning |
300 | (_("Mismatch between current exec-file %ps\n" | |
301 | "and automatically determined exec-file %ps\n" | |
302 | "exec-file-mismatch handling is currently \"%s\""), | |
303 | styled_string (file_name_style.style (), current_exec_file), | |
304 | styled_string (file_name_style.style (), exec_file_target.c_str ()), | |
305 | exec_file_mismatch_names[exec_file_mismatch_mode]); | |
306 | if (exec_file_mismatch_mode == exec_file_mismatch_ask) | |
307 | { | |
308 | symfile_add_flags add_flags = SYMFILE_MAINLINE; | |
309 | if (from_tty) | |
310 | add_flags |= SYMFILE_VERBOSE; | |
311 | try | |
312 | { | |
313 | symbol_file_add_main (exec_file_target.c_str (), add_flags); | |
314 | exec_file_attach (exec_file_target.c_str (), from_tty); | |
315 | } | |
316 | catch (gdb_exception_error &err) | |
317 | { | |
318 | warning (_("loading %ps %s"), | |
319 | styled_string (file_name_style.style (), | |
320 | exec_file_target.c_str ()), | |
321 | err.message != NULL ? err.what () : "error"); | |
322 | } | |
323 | } | |
324 | } | |
325 | } | |
326 | ||
327 | /* See gdbcore.h. */ | |
328 | ||
ecf45d2c SL |
329 | void |
330 | exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty) | |
331 | { | |
797bc1cb | 332 | char *exec_file_target; |
ecf45d2c SL |
333 | symfile_add_flags add_flags = 0; |
334 | ||
335 | /* Do nothing if we already have an executable filename. */ | |
336 | if (get_exec_file (0) != NULL) | |
337 | return; | |
338 | ||
339 | /* Try to determine a filename from the process itself. */ | |
340 | exec_file_target = target_pid_to_exec_file (pid); | |
341 | if (exec_file_target == NULL) | |
57d1de9c | 342 | { |
ecf45d2c SL |
343 | warning (_("No executable has been specified and target does not " |
344 | "support\n" | |
345 | "determining executable automatically. " | |
346 | "Try using the \"file\" command.")); | |
347 | return; | |
57d1de9c | 348 | } |
88178e82 | 349 | |
797bc1cb TT |
350 | gdb::unique_xmalloc_ptr<char> exec_file_host |
351 | = exec_file_find (exec_file_target, NULL); | |
ecf45d2c SL |
352 | |
353 | if (defer_bp_reset) | |
354 | add_flags |= SYMFILE_DEFER_BP_RESET; | |
355 | ||
356 | if (from_tty) | |
357 | add_flags |= SYMFILE_VERBOSE; | |
358 | ||
359 | /* Attempt to open the exec file. */ | |
797bc1cb | 360 | try_open_exec_file (exec_file_host.get (), current_inferior (), add_flags); |
a10de604 GB |
361 | } |
362 | ||
907083d1 | 363 | /* Set FILENAME as the new exec file. |
c906108c | 364 | |
c5aa993b JM |
365 | This function is intended to be behave essentially the same |
366 | as exec_file_command, except that the latter will detect when | |
367 | a target is being debugged, and will ask the user whether it | |
368 | should be shut down first. (If the answer is "no", then the | |
369 | new file is ignored.) | |
c906108c | 370 | |
c5aa993b JM |
371 | This file is used by exec_file_command, to do the work of opening |
372 | and processing the exec file after any prompting has happened. | |
c906108c | 373 | |
c5aa993b JM |
374 | And, it is used by child_attach, when the attach command was |
375 | given a pid but not a exec pathname, and the attach command could | |
376 | figure out the pathname from the pid. (In this case, we shouldn't | |
377 | ask the user whether the current target should be shut down -- | |
907083d1 | 378 | we're supplying the exec pathname late for good reason.) */ |
c906108c SS |
379 | |
380 | void | |
5f08566b | 381 | exec_file_attach (const char *filename, int from_tty) |
c906108c | 382 | { |
9b333ba3 TT |
383 | /* First, acquire a reference to the current exec_bfd. We release |
384 | this at the end of the function; but acquiring it now lets the | |
385 | BFD cache return it if this call refers to the same file. */ | |
1831a9f9 | 386 | gdb_bfd_ref_ptr exec_bfd_holder = gdb_bfd_ref_ptr::new_reference (exec_bfd); |
192b62ce | 387 | |
c906108c | 388 | /* Remove any previous exec file. */ |
6c95b8df | 389 | exec_close (); |
c906108c SS |
390 | |
391 | /* Now open and digest the file the user requested, if any. */ | |
392 | ||
1adeb98a FN |
393 | if (!filename) |
394 | { | |
395 | if (from_tty) | |
a3f17187 | 396 | printf_unfiltered (_("No executable file now.\n")); |
7a107747 DJ |
397 | |
398 | set_gdbarch_from_file (NULL); | |
1adeb98a FN |
399 | } |
400 | else | |
c906108c | 401 | { |
64c0b5de | 402 | int load_via_target = 0; |
14278e1f | 403 | const char *scratch_pathname, *canonical_pathname; |
c906108c | 404 | int scratch_chan; |
07b82ea5 | 405 | struct target_section *sections = NULL, *sections_end = NULL; |
d18b8b7a | 406 | char **matching; |
c5aa993b | 407 | |
64c0b5de GB |
408 | if (is_target_filename (filename)) |
409 | { | |
410 | if (target_filesystem_is_local ()) | |
411 | filename += strlen (TARGET_SYSROOT_PREFIX); | |
412 | else | |
413 | load_via_target = 1; | |
414 | } | |
415 | ||
14278e1f | 416 | gdb::unique_xmalloc_ptr<char> canonical_storage, scratch_storage; |
64c0b5de | 417 | if (load_via_target) |
c5aa993b | 418 | { |
64c0b5de GB |
419 | /* gdb_bfd_fopen does not support "target:" filenames. */ |
420 | if (write_files) | |
421 | warning (_("writing into executable files is " | |
422 | "not supported for %s sysroots"), | |
423 | TARGET_SYSROOT_PREFIX); | |
424 | ||
14278e1f | 425 | scratch_pathname = filename; |
64c0b5de | 426 | scratch_chan = -1; |
64c0b5de | 427 | canonical_pathname = scratch_pathname; |
c5aa993b | 428 | } |
64c0b5de GB |
429 | else |
430 | { | |
431 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
432 | filename, write_files ? | |
433 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, | |
e0cc99a6 | 434 | &scratch_storage); |
64c0b5de GB |
435 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
436 | if (scratch_chan < 0) | |
437 | { | |
0ae1c716 | 438 | char *exename = (char *) alloca (strlen (filename) + 5); |
64c0b5de GB |
439 | |
440 | strcat (strcpy (exename, filename), ".exe"); | |
441 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, | |
442 | exename, write_files ? | |
443 | O_RDWR | O_BINARY | |
444 | : O_RDONLY | O_BINARY, | |
e0cc99a6 | 445 | &scratch_storage); |
64c0b5de | 446 | } |
c906108c | 447 | #endif |
64c0b5de GB |
448 | if (scratch_chan < 0) |
449 | perror_with_name (filename); | |
a4453b7e | 450 | |
e0cc99a6 | 451 | scratch_pathname = scratch_storage.get (); |
a4453b7e | 452 | |
64c0b5de GB |
453 | /* gdb_bfd_open (and its variants) prefers canonicalized |
454 | pathname for better BFD caching. */ | |
14278e1f TT |
455 | canonical_storage = gdb_realpath (scratch_pathname); |
456 | canonical_pathname = canonical_storage.get (); | |
64c0b5de | 457 | } |
1f0c4988 | 458 | |
192b62ce | 459 | gdb_bfd_ref_ptr temp; |
64c0b5de | 460 | if (write_files && !load_via_target) |
192b62ce TT |
461 | temp = gdb_bfd_fopen (canonical_pathname, gnutarget, |
462 | FOPEN_RUB, scratch_chan); | |
1c00ec6b | 463 | else |
192b62ce TT |
464 | temp = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan); |
465 | exec_bfd = temp.release (); | |
c906108c SS |
466 | |
467 | if (!exec_bfd) | |
9fe4a216 | 468 | { |
a2fedca9 PW |
469 | error (_("\"%ps\": could not open as an executable file: %s."), |
470 | styled_string (file_name_style.style (), scratch_pathname), | |
471 | bfd_errmsg (bfd_get_error ())); | |
9fe4a216 | 472 | } |
c906108c | 473 | |
64c0b5de GB |
474 | /* gdb_realpath_keepfile resolves symlinks on the local |
475 | filesystem and so cannot be used for "target:" files. */ | |
1f0c4988 | 476 | gdb_assert (exec_filename == NULL); |
64c0b5de GB |
477 | if (load_via_target) |
478 | exec_filename = xstrdup (bfd_get_filename (exec_bfd)); | |
479 | else | |
4971c9a7 | 480 | exec_filename = gdb_realpath_keepfile (scratch_pathname).release (); |
1f0c4988 | 481 | |
d18b8b7a | 482 | if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching)) |
c906108c SS |
483 | { |
484 | /* Make sure to close exec_bfd, or else "run" might try to use | |
485 | it. */ | |
6c95b8df | 486 | exec_close (); |
a2fedca9 PW |
487 | error (_("\"%ps\": not in executable format: %s"), |
488 | styled_string (file_name_style.style (), scratch_pathname), | |
803c08d0 | 489 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); |
c906108c SS |
490 | } |
491 | ||
07b82ea5 | 492 | if (build_section_table (exec_bfd, §ions, §ions_end)) |
c906108c SS |
493 | { |
494 | /* Make sure to close exec_bfd, or else "run" might try to use | |
495 | it. */ | |
6c95b8df | 496 | exec_close (); |
a2fedca9 PW |
497 | error (_("\"%ps\": can't find the file sections: %s"), |
498 | styled_string (file_name_style.style (), scratch_pathname), | |
499 | bfd_errmsg (bfd_get_error ())); | |
c906108c SS |
500 | } |
501 | ||
c04ea773 DJ |
502 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
503 | ||
c906108c SS |
504 | validate_files (); |
505 | ||
506 | set_gdbarch_from_file (exec_bfd); | |
507 | ||
07b82ea5 | 508 | /* Add the executable's sections to the current address spaces' |
6c95b8df PA |
509 | list of sections. This possibly pushes the exec_ops |
510 | target. */ | |
ed9eebaf | 511 | add_target_sections (&exec_bfd, sections, sections_end); |
07b82ea5 | 512 | xfree (sections); |
c906108c SS |
513 | |
514 | /* Tell display code (if any) about the changed file name. */ | |
9a4105ab AC |
515 | if (deprecated_exec_file_display_hook) |
516 | (*deprecated_exec_file_display_hook) (filename); | |
c906108c | 517 | } |
9b333ba3 | 518 | |
ce7d4522 | 519 | bfd_cache_close_all (); |
76727919 | 520 | gdb::observers::executable_changed.notify (); |
c906108c SS |
521 | } |
522 | ||
523 | /* Process the first arg in ARGS as the new exec file. | |
524 | ||
c5aa993b JM |
525 | Note that we have to explicitly ignore additional args, since we can |
526 | be called from file_command(), which also calls symbol_file_command() | |
1adeb98a FN |
527 | which can take multiple args. |
528 | ||
0963b4bd | 529 | If ARGS is NULL, we just want to close the exec file. */ |
c906108c | 530 | |
1adeb98a | 531 | static void |
1d8b34a7 | 532 | exec_file_command (const char *args, int from_tty) |
c906108c | 533 | { |
4c42eaff DJ |
534 | if (from_tty && target_has_execution |
535 | && !query (_("A program is being debugged already.\n" | |
536 | "Are you sure you want to change the file? "))) | |
537 | error (_("File not changed.")); | |
1adeb98a FN |
538 | |
539 | if (args) | |
540 | { | |
541 | /* Scan through the args and pick up the first non option arg | |
542 | as the filename. */ | |
543 | ||
773a1edc TT |
544 | gdb_argv built_argv (args); |
545 | char **argv = built_argv.get (); | |
1adeb98a FN |
546 | |
547 | for (; (*argv != NULL) && (**argv == '-'); argv++) | |
548 | {; | |
549 | } | |
550 | if (*argv == NULL) | |
8a3fe4f8 | 551 | error (_("No executable file name was specified")); |
1adeb98a | 552 | |
773a1edc TT |
553 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (*argv)); |
554 | exec_file_attach (filename.get (), from_tty); | |
1adeb98a FN |
555 | } |
556 | else | |
557 | exec_file_attach (NULL, from_tty); | |
c906108c SS |
558 | } |
559 | ||
0963b4bd | 560 | /* Set both the exec file and the symbol file, in one command. |
c906108c SS |
561 | What a novelty. Why did GDB go through four major releases before this |
562 | command was added? */ | |
563 | ||
564 | static void | |
1d8b34a7 | 565 | file_command (const char *arg, int from_tty) |
c906108c SS |
566 | { |
567 | /* FIXME, if we lose on reading the symbol file, we should revert | |
568 | the exec file, but that's rough. */ | |
569 | exec_file_command (arg, from_tty); | |
570 | symbol_file_command (arg, from_tty); | |
9a4105ab AC |
571 | if (deprecated_file_changed_hook) |
572 | deprecated_file_changed_hook (arg); | |
c906108c | 573 | } |
c906108c | 574 | \f |
c5aa993b | 575 | |
0963b4bd | 576 | /* Locate all mappable sections of a BFD file. |
c906108c SS |
577 | table_pp_char is a char * to get it through bfd_map_over_sections; |
578 | we cast it back to its proper type. */ | |
579 | ||
580 | static void | |
7be0c536 AC |
581 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
582 | void *table_pp_char) | |
c906108c | 583 | { |
0542c86d | 584 | struct target_section **table_pp = (struct target_section **) table_pp_char; |
c906108c SS |
585 | flagword aflag; |
586 | ||
2b2848e2 DE |
587 | gdb_assert (abfd == asect->owner); |
588 | ||
0f5d55d8 JB |
589 | /* Check the section flags, but do not discard zero-length sections, since |
590 | some symbols may still be attached to this section. For instance, we | |
591 | encountered on sparc-solaris 2.10 a shared library with an empty .bss | |
592 | section to which a symbol named "_end" was attached. The address | |
593 | of this symbol still needs to be relocated. */ | |
fd361982 | 594 | aflag = bfd_section_flags (asect); |
c906108c SS |
595 | if (!(aflag & SEC_ALLOC)) |
596 | return; | |
0f5d55d8 | 597 | |
046ac79f | 598 | (*table_pp)->owner = NULL; |
c906108c | 599 | (*table_pp)->the_bfd_section = asect; |
fd361982 AM |
600 | (*table_pp)->addr = bfd_section_vma (asect); |
601 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (asect); | |
c906108c SS |
602 | (*table_pp)++; |
603 | } | |
604 | ||
a5b1fd27 DE |
605 | /* See exec.h. */ |
606 | ||
607 | void | |
608 | clear_section_table (struct target_section_table *table) | |
609 | { | |
610 | xfree (table->sections); | |
611 | table->sections = table->sections_end = NULL; | |
612 | } | |
613 | ||
614 | /* Resize section table TABLE by ADJUSTMENT. | |
615 | ADJUSTMENT may be negative, in which case the caller must have already | |
616 | removed the sections being deleted. | |
617 | Returns the old size. */ | |
618 | ||
619 | static int | |
620 | resize_section_table (struct target_section_table *table, int adjustment) | |
07b82ea5 | 621 | { |
07b82ea5 PA |
622 | int old_count; |
623 | int new_count; | |
624 | ||
07b82ea5 PA |
625 | old_count = table->sections_end - table->sections; |
626 | ||
a5b1fd27 | 627 | new_count = adjustment + old_count; |
07b82ea5 PA |
628 | |
629 | if (new_count) | |
630 | { | |
224c3ddb SM |
631 | table->sections = XRESIZEVEC (struct target_section, table->sections, |
632 | new_count); | |
07b82ea5 PA |
633 | table->sections_end = table->sections + new_count; |
634 | } | |
635 | else | |
a5b1fd27 | 636 | clear_section_table (table); |
07b82ea5 PA |
637 | |
638 | return old_count; | |
639 | } | |
640 | ||
c906108c SS |
641 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
642 | Returns 0 if OK, 1 on error. */ | |
643 | ||
644 | int | |
0542c86d PA |
645 | build_section_table (struct bfd *some_bfd, struct target_section **start, |
646 | struct target_section **end) | |
c906108c SS |
647 | { |
648 | unsigned count; | |
649 | ||
650 | count = bfd_count_sections (some_bfd); | |
651 | if (*start) | |
b8c9b27d | 652 | xfree (* start); |
8d749320 | 653 | *start = XNEWVEC (struct target_section, count); |
c906108c | 654 | *end = *start; |
c5aa993b | 655 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
e2ff18a0 SM |
656 | |
657 | gdb_assert (*end <= *start + count); | |
658 | ||
c906108c SS |
659 | /* We could realloc the table, but it probably loses for most files. */ |
660 | return 0; | |
661 | } | |
07b82ea5 PA |
662 | |
663 | /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the | |
664 | current set of target sections. */ | |
665 | ||
666 | void | |
046ac79f | 667 | add_target_sections (void *owner, |
ed9eebaf | 668 | struct target_section *sections, |
07b82ea5 PA |
669 | struct target_section *sections_end) |
670 | { | |
671 | int count; | |
672 | struct target_section_table *table = current_target_sections; | |
673 | ||
674 | count = sections_end - sections; | |
675 | ||
676 | if (count > 0) | |
677 | { | |
678 | int space = resize_section_table (table, count); | |
ed9eebaf | 679 | int i; |
d7f9d729 | 680 | |
ed9eebaf TT |
681 | for (i = 0; i < count; ++i) |
682 | { | |
683 | table->sections[space + i] = sections[i]; | |
046ac79f | 684 | table->sections[space + i].owner = owner; |
ed9eebaf | 685 | } |
07b82ea5 | 686 | |
53af73bf | 687 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f PA |
688 | program_space *curr_pspace = current_program_space; |
689 | ||
07b82ea5 | 690 | /* If these are the first file sections we can provide memory |
5b6d1e4f PA |
691 | from, push the file_stratum target. Must do this in all |
692 | inferiors sharing the program space. */ | |
693 | for (inferior *inf : all_inferiors ()) | |
694 | { | |
695 | if (inf->pspace != curr_pspace) | |
696 | continue; | |
697 | ||
698 | if (inf->target_is_pushed (&exec_ops)) | |
699 | continue; | |
700 | ||
701 | switch_to_inferior_no_thread (inf); | |
702 | push_target (&exec_ops); | |
703 | } | |
07b82ea5 PA |
704 | } |
705 | } | |
706 | ||
76ad5e1e NB |
707 | /* Add the sections of OBJFILE to the current set of target sections. */ |
708 | ||
709 | void | |
710 | add_target_sections_of_objfile (struct objfile *objfile) | |
711 | { | |
712 | struct target_section_table *table = current_target_sections; | |
713 | struct obj_section *osect; | |
714 | int space; | |
715 | unsigned count = 0; | |
716 | struct target_section *ts; | |
717 | ||
718 | if (objfile == NULL) | |
719 | return; | |
720 | ||
721 | /* Compute the number of sections to add. */ | |
722 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
723 | { | |
fd361982 | 724 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
725 | continue; |
726 | count++; | |
727 | } | |
728 | ||
729 | if (count == 0) | |
730 | return; | |
731 | ||
732 | space = resize_section_table (table, count); | |
733 | ||
734 | ts = table->sections + space; | |
735 | ||
736 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
737 | { | |
fd361982 | 738 | if (bfd_section_size (osect->the_bfd_section) == 0) |
76ad5e1e NB |
739 | continue; |
740 | ||
741 | gdb_assert (ts < table->sections + space + count); | |
742 | ||
743 | ts->addr = obj_section_addr (osect); | |
744 | ts->endaddr = obj_section_endaddr (osect); | |
745 | ts->the_bfd_section = osect->the_bfd_section; | |
746 | ts->owner = (void *) objfile; | |
747 | ||
748 | ts++; | |
749 | } | |
750 | } | |
751 | ||
046ac79f JK |
752 | /* Remove all target sections owned by OWNER. |
753 | OWNER must be the same value passed to add_target_sections. */ | |
07b82ea5 PA |
754 | |
755 | void | |
046ac79f | 756 | remove_target_sections (void *owner) |
07b82ea5 PA |
757 | { |
758 | struct target_section *src, *dest; | |
07b82ea5 PA |
759 | struct target_section_table *table = current_target_sections; |
760 | ||
046ac79f JK |
761 | gdb_assert (owner != NULL); |
762 | ||
07b82ea5 PA |
763 | dest = table->sections; |
764 | for (src = table->sections; src < table->sections_end; src++) | |
046ac79f | 765 | if (src->owner != owner) |
07b82ea5 PA |
766 | { |
767 | /* Keep this section. */ | |
768 | if (dest < src) | |
769 | *dest = *src; | |
770 | dest++; | |
771 | } | |
772 | ||
773 | /* If we've dropped any sections, resize the section table. */ | |
774 | if (dest < src) | |
775 | { | |
776 | int old_count; | |
777 | ||
778 | old_count = resize_section_table (table, dest - src); | |
779 | ||
780 | /* If we don't have any more sections to read memory from, | |
5b6d1e4f PA |
781 | remove the file_stratum target from the stack of each |
782 | inferior sharing the program space. */ | |
07b82ea5 | 783 | if (old_count + (dest - src) == 0) |
6c95b8df | 784 | { |
53af73bf | 785 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
5b6d1e4f PA |
786 | program_space *curr_pspace = current_program_space; |
787 | ||
788 | for (inferior *inf : all_inferiors ()) | |
789 | { | |
790 | if (inf->pspace != curr_pspace) | |
791 | continue; | |
6c95b8df | 792 | |
5b6d1e4f PA |
793 | if (inf->pspace->target_sections.sections |
794 | != inf->pspace->target_sections.sections_end) | |
795 | continue; | |
6c95b8df | 796 | |
5b6d1e4f PA |
797 | switch_to_inferior_no_thread (inf); |
798 | unpush_target (&exec_ops); | |
799 | } | |
6c95b8df | 800 | } |
07b82ea5 PA |
801 | } |
802 | } | |
803 | ||
5b6d1e4f PA |
804 | /* See exec.h. */ |
805 | ||
806 | void | |
807 | exec_on_vfork () | |
808 | { | |
809 | if (current_program_space->target_sections.sections | |
810 | != current_program_space->target_sections.sections_end) | |
811 | push_target (&exec_ops); | |
812 | } | |
813 | ||
c906108c | 814 | \f |
348f8c02 | 815 | |
1ca49d37 YQ |
816 | enum target_xfer_status |
817 | exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset, | |
818 | ULONGEST len, ULONGEST *xfered_len) | |
819 | { | |
820 | /* It's unduly pedantic to refuse to look at the executable for | |
821 | read-only pieces; so do the equivalent of readonly regions aka | |
822 | QTro packet. */ | |
823 | if (exec_bfd != NULL) | |
824 | { | |
825 | asection *s; | |
826 | bfd_size_type size; | |
827 | bfd_vma vma; | |
828 | ||
829 | for (s = exec_bfd->sections; s; s = s->next) | |
830 | { | |
831 | if ((s->flags & SEC_LOAD) == 0 | |
832 | || (s->flags & SEC_READONLY) == 0) | |
833 | continue; | |
834 | ||
835 | vma = s->vma; | |
fd361982 | 836 | size = bfd_section_size (s); |
1ca49d37 YQ |
837 | if (vma <= offset && offset < (vma + size)) |
838 | { | |
839 | ULONGEST amt; | |
840 | ||
841 | amt = (vma + size) - offset; | |
842 | if (amt > len) | |
843 | amt = len; | |
844 | ||
845 | amt = bfd_get_section_contents (exec_bfd, s, | |
846 | readbuf, offset - vma, amt); | |
847 | ||
848 | if (amt == 0) | |
849 | return TARGET_XFER_EOF; | |
850 | else | |
851 | { | |
852 | *xfered_len = amt; | |
853 | return TARGET_XFER_OK; | |
854 | } | |
855 | } | |
856 | } | |
857 | } | |
858 | ||
859 | /* Indicate failure to find the requested memory block. */ | |
860 | return TARGET_XFER_E_IO; | |
861 | } | |
862 | ||
a79b1bc6 | 863 | /* Return all read-only memory ranges found in the target section |
5a2eb0ef | 864 | table defined by SECTIONS and SECTIONS_END, starting at (and |
a79b1bc6 | 865 | intersected with) MEMADDR for LEN bytes. */ |
5a2eb0ef | 866 | |
a79b1bc6 SM |
867 | static std::vector<mem_range> |
868 | section_table_available_memory (CORE_ADDR memaddr, ULONGEST len, | |
e6ca34fc PA |
869 | struct target_section *sections, |
870 | struct target_section *sections_end) | |
871 | { | |
a79b1bc6 | 872 | std::vector<mem_range> memory; |
e6ca34fc | 873 | |
a79b1bc6 | 874 | for (target_section *p = sections; p < sections_end; p++) |
e6ca34fc | 875 | { |
fd361982 | 876 | if ((bfd_section_flags (p->the_bfd_section) & SEC_READONLY) == 0) |
e6ca34fc PA |
877 | continue; |
878 | ||
879 | /* Copy the meta-data, adjusted. */ | |
880 | if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len)) | |
881 | { | |
882 | ULONGEST lo1, hi1, lo2, hi2; | |
e6ca34fc PA |
883 | |
884 | lo1 = memaddr; | |
885 | hi1 = memaddr + len; | |
886 | ||
887 | lo2 = p->addr; | |
888 | hi2 = p->endaddr; | |
889 | ||
a79b1bc6 SM |
890 | CORE_ADDR start = std::max (lo1, lo2); |
891 | int length = std::min (hi1, hi2) - start; | |
e6ca34fc | 892 | |
a79b1bc6 | 893 | memory.emplace_back (start, length); |
e6ca34fc PA |
894 | } |
895 | } | |
896 | ||
897 | return memory; | |
898 | } | |
899 | ||
1ee79381 YQ |
900 | enum target_xfer_status |
901 | section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset, | |
902 | ULONGEST len, ULONGEST *xfered_len) | |
903 | { | |
a79b1bc6 SM |
904 | target_section_table *table = target_get_section_table (&exec_ops); |
905 | std::vector<mem_range> available_memory | |
906 | = section_table_available_memory (offset, len, | |
907 | table->sections, table->sections_end); | |
1ee79381 | 908 | |
a79b1bc6 | 909 | normalize_mem_ranges (&available_memory); |
1ee79381 | 910 | |
a79b1bc6 | 911 | for (const mem_range &r : available_memory) |
1ee79381 | 912 | { |
a79b1bc6 | 913 | if (mem_ranges_overlap (r.start, r.length, offset, len)) |
1ee79381 YQ |
914 | { |
915 | CORE_ADDR end; | |
916 | enum target_xfer_status status; | |
917 | ||
918 | /* Get the intersection window. */ | |
a79b1bc6 | 919 | end = std::min<CORE_ADDR> (offset + len, r.start + r.length); |
1ee79381 YQ |
920 | |
921 | gdb_assert (end - offset <= len); | |
922 | ||
a79b1bc6 | 923 | if (offset >= r.start) |
1ee79381 YQ |
924 | status = exec_read_partial_read_only (readbuf, offset, |
925 | end - offset, | |
926 | xfered_len); | |
927 | else | |
928 | { | |
a79b1bc6 | 929 | *xfered_len = r.start - offset; |
bc113b4e | 930 | status = TARGET_XFER_UNAVAILABLE; |
1ee79381 | 931 | } |
1ee79381 YQ |
932 | return status; |
933 | } | |
934 | } | |
1ee79381 YQ |
935 | |
936 | *xfered_len = len; | |
bc113b4e | 937 | return TARGET_XFER_UNAVAILABLE; |
1ee79381 YQ |
938 | } |
939 | ||
9b409511 | 940 | enum target_xfer_status |
07b82ea5 | 941 | section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf, |
b55e14c7 | 942 | ULONGEST offset, ULONGEST len, |
9b409511 | 943 | ULONGEST *xfered_len, |
07b82ea5 PA |
944 | struct target_section *sections, |
945 | struct target_section *sections_end, | |
946 | const char *section_name) | |
c906108c | 947 | { |
020cc13c | 948 | int res; |
0542c86d | 949 | struct target_section *p; |
07b82ea5 PA |
950 | ULONGEST memaddr = offset; |
951 | ULONGEST memend = memaddr + len; | |
c906108c | 952 | |
e2ff18a0 | 953 | gdb_assert (len != 0); |
c906108c | 954 | |
348f8c02 | 955 | for (p = sections; p < sections_end; p++) |
c906108c | 956 | { |
2b2848e2 DE |
957 | struct bfd_section *asect = p->the_bfd_section; |
958 | bfd *abfd = asect->owner; | |
959 | ||
960 | if (section_name && strcmp (section_name, asect->name) != 0) | |
0963b4bd | 961 | continue; /* not the section we need. */ |
c906108c | 962 | if (memaddr >= p->addr) |
3db26b01 JB |
963 | { |
964 | if (memend <= p->endaddr) | |
965 | { | |
966 | /* Entire transfer is within this section. */ | |
07b82ea5 | 967 | if (writebuf) |
2b2848e2 | 968 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 969 | writebuf, memaddr - p->addr, |
85302095 AC |
970 | len); |
971 | else | |
2b2848e2 | 972 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 973 | readbuf, memaddr - p->addr, |
85302095 | 974 | len); |
9b409511 YQ |
975 | |
976 | if (res != 0) | |
977 | { | |
978 | *xfered_len = len; | |
979 | return TARGET_XFER_OK; | |
980 | } | |
981 | else | |
982 | return TARGET_XFER_EOF; | |
3db26b01 JB |
983 | } |
984 | else if (memaddr >= p->endaddr) | |
985 | { | |
986 | /* This section ends before the transfer starts. */ | |
987 | continue; | |
988 | } | |
989 | else | |
990 | { | |
991 | /* This section overlaps the transfer. Just do half. */ | |
992 | len = p->endaddr - memaddr; | |
07b82ea5 | 993 | if (writebuf) |
2b2848e2 | 994 | res = bfd_set_section_contents (abfd, asect, |
07b82ea5 | 995 | writebuf, memaddr - p->addr, |
85302095 AC |
996 | len); |
997 | else | |
2b2848e2 | 998 | res = bfd_get_section_contents (abfd, asect, |
07b82ea5 | 999 | readbuf, memaddr - p->addr, |
85302095 | 1000 | len); |
9b409511 YQ |
1001 | if (res != 0) |
1002 | { | |
1003 | *xfered_len = len; | |
1004 | return TARGET_XFER_OK; | |
1005 | } | |
1006 | else | |
1007 | return TARGET_XFER_EOF; | |
3db26b01 JB |
1008 | } |
1009 | } | |
c906108c SS |
1010 | } |
1011 | ||
9b409511 | 1012 | return TARGET_XFER_EOF; /* We can't help. */ |
c906108c | 1013 | } |
348f8c02 | 1014 | |
f6ac5f3d PA |
1015 | struct target_section_table * |
1016 | exec_target::get_section_table () | |
348f8c02 | 1017 | { |
07b82ea5 | 1018 | return current_target_sections; |
348f8c02 PA |
1019 | } |
1020 | ||
f6ac5f3d PA |
1021 | enum target_xfer_status |
1022 | exec_target::xfer_partial (enum target_object object, | |
1023 | const char *annex, gdb_byte *readbuf, | |
1024 | const gdb_byte *writebuf, | |
1025 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
348f8c02 | 1026 | { |
f6ac5f3d | 1027 | struct target_section_table *table = get_section_table (); |
07b82ea5 PA |
1028 | |
1029 | if (object == TARGET_OBJECT_MEMORY) | |
1030 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1031 | offset, len, xfered_len, |
07b82ea5 PA |
1032 | table->sections, |
1033 | table->sections_end, | |
1034 | NULL); | |
1035 | else | |
2ed4b548 | 1036 | return TARGET_XFER_E_IO; |
348f8c02 | 1037 | } |
c906108c | 1038 | \f |
c5aa993b | 1039 | |
c906108c | 1040 | void |
07b82ea5 | 1041 | print_section_info (struct target_section_table *t, bfd *abfd) |
c906108c | 1042 | { |
5af949e3 | 1043 | struct gdbarch *gdbarch = gdbarch_from_bfd (abfd); |
0542c86d | 1044 | struct target_section *p; |
17a912b6 | 1045 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
5af949e3 | 1046 | int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16; |
c906108c | 1047 | |
a2fedca9 PW |
1048 | printf_filtered ("\t`%ps', ", |
1049 | styled_string (file_name_style.style (), | |
1050 | bfd_get_filename (abfd))); | |
c906108c | 1051 | wrap_here (" "); |
a3f17187 | 1052 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
c906108c | 1053 | if (abfd == exec_bfd) |
51bee8e9 | 1054 | { |
3e43a32a MS |
1055 | /* gcc-3.4 does not like the initialization in |
1056 | <p == t->sections_end>. */ | |
d904de5b | 1057 | bfd_vma displacement = 0; |
2f1bdd26 | 1058 | bfd_vma entry_point; |
51bee8e9 JK |
1059 | |
1060 | for (p = t->sections; p < t->sections_end; p++) | |
1061 | { | |
2b2848e2 | 1062 | struct bfd_section *psect = p->the_bfd_section; |
51bee8e9 | 1063 | |
fd361982 | 1064 | if ((bfd_section_flags (psect) & (SEC_ALLOC | SEC_LOAD)) |
51bee8e9 JK |
1065 | != (SEC_ALLOC | SEC_LOAD)) |
1066 | continue; | |
1067 | ||
fd361982 AM |
1068 | if (bfd_section_vma (psect) <= abfd->start_address |
1069 | && abfd->start_address < (bfd_section_vma (psect) | |
1070 | + bfd_section_size (psect))) | |
51bee8e9 | 1071 | { |
fd361982 | 1072 | displacement = p->addr - bfd_section_vma (psect); |
51bee8e9 JK |
1073 | break; |
1074 | } | |
1075 | } | |
1076 | if (p == t->sections_end) | |
a2fedca9 PW |
1077 | warning (_("Cannot find section for the entry point of %ps."), |
1078 | styled_string (file_name_style.style (), | |
1079 | bfd_get_filename (abfd))); | |
51bee8e9 | 1080 | |
2f1bdd26 MGD |
1081 | entry_point = gdbarch_addr_bits_remove (gdbarch, |
1082 | bfd_get_start_address (abfd) | |
1083 | + displacement); | |
51bee8e9 | 1084 | printf_filtered (_("\tEntry point: %s\n"), |
2f1bdd26 | 1085 | paddress (gdbarch, entry_point)); |
51bee8e9 | 1086 | } |
07b82ea5 | 1087 | for (p = t->sections; p < t->sections_end; p++) |
c906108c | 1088 | { |
2b2848e2 DE |
1089 | struct bfd_section *psect = p->the_bfd_section; |
1090 | bfd *pbfd = psect->owner; | |
1091 | ||
bb599908 PH |
1092 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
1093 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); | |
bcf16802 KB |
1094 | |
1095 | /* FIXME: A format of "08l" is not wide enough for file offsets | |
1096 | larger than 4GB. OTOH, making it "016l" isn't desirable either | |
1097 | since most output will then be much wider than necessary. It | |
1098 | may make sense to test the size of the file and choose the | |
1099 | format string accordingly. */ | |
a3f17187 | 1100 | /* FIXME: i18n: Need to rewrite this sentence. */ |
c906108c SS |
1101 | if (info_verbose) |
1102 | printf_filtered (" @ %s", | |
2b2848e2 | 1103 | hex_string_custom (psect->filepos, 8)); |
fd361982 | 1104 | printf_filtered (" is %s", bfd_section_name (psect)); |
2b2848e2 | 1105 | if (pbfd != abfd) |
a2fedca9 PW |
1106 | printf_filtered (" in %ps", |
1107 | styled_string (file_name_style.style (), | |
1108 | bfd_get_filename (pbfd))); | |
c906108c SS |
1109 | printf_filtered ("\n"); |
1110 | } | |
1111 | } | |
1112 | ||
f6ac5f3d PA |
1113 | void |
1114 | exec_target::files_info () | |
c906108c | 1115 | { |
57008375 JK |
1116 | if (exec_bfd) |
1117 | print_section_info (current_target_sections, exec_bfd); | |
1118 | else | |
1119 | puts_filtered (_("\t<no file loaded>\n")); | |
c906108c SS |
1120 | } |
1121 | ||
1122 | static void | |
0b39b52e | 1123 | set_section_command (const char *args, int from_tty) |
c906108c | 1124 | { |
0542c86d | 1125 | struct target_section *p; |
0b39b52e | 1126 | const char *secname; |
c906108c SS |
1127 | unsigned seclen; |
1128 | unsigned long secaddr; | |
1129 | char secprint[100]; | |
1130 | long offset; | |
07b82ea5 | 1131 | struct target_section_table *table; |
c906108c SS |
1132 | |
1133 | if (args == 0) | |
8a3fe4f8 | 1134 | error (_("Must specify section name and its virtual address")); |
c906108c | 1135 | |
0963b4bd | 1136 | /* Parse out section name. */ |
c5aa993b | 1137 | for (secname = args; !isspace (*args); args++); |
c906108c SS |
1138 | seclen = args - secname; |
1139 | ||
0963b4bd | 1140 | /* Parse out new virtual address. */ |
c906108c SS |
1141 | secaddr = parse_and_eval_address (args); |
1142 | ||
07b82ea5 PA |
1143 | table = current_target_sections; |
1144 | for (p = table->sections; p < table->sections_end; p++) | |
c5aa993b | 1145 | { |
fd361982 AM |
1146 | if (!strncmp (secname, bfd_section_name (p->the_bfd_section), seclen) |
1147 | && bfd_section_name (p->the_bfd_section)[seclen] == '\0') | |
c5aa993b JM |
1148 | { |
1149 | offset = secaddr - p->addr; | |
1150 | p->addr += offset; | |
1151 | p->endaddr += offset; | |
1152 | if (from_tty) | |
f6ac5f3d | 1153 | exec_ops.files_info (); |
c5aa993b JM |
1154 | return; |
1155 | } | |
c906108c | 1156 | } |
c906108c SS |
1157 | if (seclen >= sizeof (secprint)) |
1158 | seclen = sizeof (secprint) - 1; | |
1159 | strncpy (secprint, secname, seclen); | |
1160 | secprint[seclen] = '\0'; | |
8a3fe4f8 | 1161 | error (_("Section %s not found"), secprint); |
c906108c SS |
1162 | } |
1163 | ||
30510692 DJ |
1164 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
1165 | it to ADDRESS. */ | |
c1bd25fd DJ |
1166 | |
1167 | void | |
1168 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) | |
1169 | { | |
0542c86d | 1170 | struct target_section *p; |
07b82ea5 | 1171 | struct target_section_table *table; |
c1bd25fd | 1172 | |
07b82ea5 PA |
1173 | table = current_target_sections; |
1174 | for (p = table->sections; p < table->sections_end; p++) | |
c1bd25fd | 1175 | { |
2b2848e2 | 1176 | if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0 |
30510692 | 1177 | && index == p->the_bfd_section->index) |
c1bd25fd | 1178 | { |
30510692 | 1179 | p->endaddr += address - p->addr; |
c1bd25fd | 1180 | p->addr = address; |
c1bd25fd DJ |
1181 | } |
1182 | } | |
1183 | } | |
1184 | ||
57810aa7 | 1185 | bool |
f6ac5f3d | 1186 | exec_target::has_memory () |
c35b1492 PA |
1187 | { |
1188 | /* We can provide memory if we have any file/target sections to read | |
1189 | from. */ | |
1190 | return (current_target_sections->sections | |
1191 | != current_target_sections->sections_end); | |
1192 | } | |
1193 | ||
f6ac5f3d PA |
1194 | char * |
1195 | exec_target::make_corefile_notes (bfd *obfd, int *note_size) | |
83814951 TT |
1196 | { |
1197 | error (_("Can't create a corefile")); | |
1198 | } | |
be4d1333 | 1199 | |
f6ac5f3d PA |
1200 | int |
1201 | exec_target::find_memory_regions (find_memory_region_ftype func, void *data) | |
c906108c | 1202 | { |
f6ac5f3d | 1203 | return objfile_find_memory_regions (this, func, data); |
c906108c SS |
1204 | } |
1205 | ||
6c265988 | 1206 | void _initialize_exec (); |
c906108c | 1207 | void |
6c265988 | 1208 | _initialize_exec () |
c906108c SS |
1209 | { |
1210 | struct cmd_list_element *c; | |
1211 | ||
c906108c SS |
1212 | if (!dbx_commands) |
1213 | { | |
1a966eab AC |
1214 | c = add_cmd ("file", class_files, file_command, _("\ |
1215 | Use FILE as program to be debugged.\n\ | |
c906108c SS |
1216 | It is read for its symbols, for getting the contents of pure memory,\n\ |
1217 | and it is the program executed when you use the `run' command.\n\ | |
1218 | If FILE cannot be found as specified, your execution directory path\n\ | |
1219 | ($PATH) is searched for a command of that name.\n\ | |
1a966eab | 1220 | No arg means to have no executable file and no symbols."), &cmdlist); |
5ba2abeb | 1221 | set_cmd_completer (c, filename_completer); |
c906108c SS |
1222 | } |
1223 | ||
1a966eab AC |
1224 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
1225 | Use FILE as program for getting contents of pure memory.\n\ | |
c906108c SS |
1226 | If FILE cannot be found as specified, your execution directory path\n\ |
1227 | is searched for a command of that name.\n\ | |
1a966eab | 1228 | No arg means have no executable file."), &cmdlist); |
5ba2abeb | 1229 | set_cmd_completer (c, filename_completer); |
c906108c | 1230 | |
1bedd215 AC |
1231 | add_com ("section", class_files, set_section_command, _("\ |
1232 | Change the base address of section SECTION of the exec file to ADDR.\n\ | |
c906108c SS |
1233 | This can be used if the exec file does not contain section addresses,\n\ |
1234 | (such as in the a.out format), or when the addresses specified in the\n\ | |
1235 | file itself are wrong. Each section must be changed separately. The\n\ | |
1bedd215 | 1236 | ``info files'' command lists all the sections and their addresses.")); |
c906108c | 1237 | |
5bf193a2 AC |
1238 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
1239 | Set writing into executable and core files."), _("\ | |
1240 | Show writing into executable and core files."), NULL, | |
1241 | NULL, | |
920d2a44 | 1242 | show_write_files, |
5bf193a2 | 1243 | &setlist, &showlist); |
c5aa993b | 1244 | |
a2fedca9 PW |
1245 | add_setshow_enum_cmd ("exec-file-mismatch", class_support, |
1246 | exec_file_mismatch_names, | |
1247 | &exec_file_mismatch, | |
1248 | _("\ | |
1249 | Set exec-file-mismatch handling (ask|warn|off)."), | |
1250 | _("\ | |
1251 | Show exec-file-mismatch handling (ask|warn|off)."), | |
1252 | _("\ | |
98c59b52 PA |
1253 | Specifies how to handle a mismatch between the current exec-file\n\ |
1254 | loaded by GDB and the exec-file automatically determined when attaching\n\ | |
a2fedca9 PW |
1255 | to a process:\n\n\ |
1256 | ask - warn the user and ask whether to load the determined exec-file.\n\ | |
1257 | warn - warn the user, but do not change the exec-file.\n\ | |
1258 | off - do not check for mismatch."), | |
1259 | set_exec_file_mismatch_command, | |
1260 | show_exec_file_mismatch_command, | |
1261 | &setlist, &showlist); | |
1262 | ||
d9f719f1 | 1263 | add_target (exec_target_info, exec_target_open, filename_completer); |
c906108c | 1264 | } |