Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
3666a048 | 3 | Copyright (C) 1986-2021 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
d55e5aa6 | 21 | #include "arch-utils.h" |
4de283e4 TT |
22 | #include <signal.h> |
23 | #include <fcntl.h> | |
24 | #include "frame.h" /* required by inferior.h */ | |
d55e5aa6 TT |
25 | #include "inferior.h" |
26 | #include "infrun.h" | |
4de283e4 TT |
27 | #include "symtab.h" |
28 | #include "command.h" | |
29 | #include "bfd.h" | |
30 | #include "target.h" | |
d55e5aa6 | 31 | #include "process-stratum-target.h" |
4de283e4 TT |
32 | #include "gdbcore.h" |
33 | #include "gdbthread.h" | |
4e052eda | 34 | #include "regcache.h" |
0e24ac5d | 35 | #include "regset.h" |
d55e5aa6 | 36 | #include "symfile.h" |
4de283e4 | 37 | #include "exec.h" |
e0eac551 | 38 | #include "readline/tilde.h" |
4de283e4 | 39 | #include "solib.h" |
db082f59 | 40 | #include "solist.h" |
4de283e4 TT |
41 | #include "filenames.h" |
42 | #include "progspace.h" | |
43 | #include "objfiles.h" | |
44 | #include "gdb_bfd.h" | |
45 | #include "completer.h" | |
268a13a5 | 46 | #include "gdbsupport/filestuff.h" |
aa2d5a42 | 47 | #include "build-id.h" |
ff8577f6 | 48 | #include "gdbsupport/pathstuff.h" |
db082f59 | 49 | #include <unordered_map> |
973695d6 | 50 | #include <unordered_set> |
09c2f5d4 | 51 | #include "gdbcmd.h" |
95ce627a | 52 | #include "xml-tdesc.h" |
8e860359 | 53 | |
ee28ca0f AC |
54 | #ifndef O_LARGEFILE |
55 | #define O_LARGEFILE 0 | |
56 | #endif | |
57 | ||
f6ac5f3d PA |
58 | /* The core file target. */ |
59 | ||
d9f719f1 PA |
60 | static const target_info core_target_info = { |
61 | "core", | |
62 | N_("Local core dump file"), | |
590042fc PW |
63 | N_("Use a core file as a target.\n\ |
64 | Specify the filename of the core file.") | |
d9f719f1 PA |
65 | }; |
66 | ||
3b3dac9b | 67 | class core_target final : public process_stratum_target |
f6ac5f3d PA |
68 | { |
69 | public: | |
15244507 | 70 | core_target (); |
f6ac5f3d | 71 | |
d9f719f1 PA |
72 | const target_info &info () const override |
73 | { return core_target_info; } | |
f6ac5f3d | 74 | |
f6ac5f3d PA |
75 | void close () override; |
76 | void detach (inferior *, int) override; | |
77 | void fetch_registers (struct regcache *, int) override; | |
78 | ||
79 | enum target_xfer_status xfer_partial (enum target_object object, | |
80 | const char *annex, | |
81 | gdb_byte *readbuf, | |
82 | const gdb_byte *writebuf, | |
83 | ULONGEST offset, ULONGEST len, | |
84 | ULONGEST *xfered_len) override; | |
85 | void files_info () override; | |
86 | ||
57810aa7 | 87 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
88 | const struct target_desc *read_description () override; |
89 | ||
a068643d | 90 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d PA |
91 | |
92 | const char *thread_name (struct thread_info *) override; | |
93 | ||
2735d421 | 94 | bool has_all_memory () override { return true; } |
57810aa7 PA |
95 | bool has_memory () override; |
96 | bool has_stack () override; | |
97 | bool has_registers () override; | |
5018ce90 | 98 | bool has_execution (inferior *inf) override { return false; } |
f3d11a9a | 99 | |
f6ac5f3d | 100 | bool info_proc (const char *, enum info_proc_what) override; |
f6ac5f3d | 101 | |
15244507 PA |
102 | /* A few helpers. */ |
103 | ||
104 | /* Getter, see variable definition. */ | |
105 | struct gdbarch *core_gdbarch () | |
106 | { | |
107 | return m_core_gdbarch; | |
108 | } | |
109 | ||
110 | /* See definition. */ | |
111 | void get_core_register_section (struct regcache *regcache, | |
112 | const struct regset *regset, | |
113 | const char *name, | |
dbd534fe | 114 | int section_min_size, |
15244507 PA |
115 | const char *human_name, |
116 | bool required); | |
117 | ||
09c2f5d4 KB |
118 | /* See definition. */ |
119 | void info_proc_mappings (struct gdbarch *gdbarch); | |
120 | ||
15244507 PA |
121 | private: /* per-core data */ |
122 | ||
123 | /* The core's section table. Note that these target sections are | |
124 | *not* mapped in the current address spaces' set of target | |
125 | sections --- those should come only from pure executable or | |
126 | shared library bfds. The core bfd sections are an implementation | |
127 | detail of the core target, just like ptrace is for unix child | |
128 | targets. */ | |
bb2a6777 | 129 | target_section_table m_core_section_table; |
15244507 | 130 | |
db082f59 KB |
131 | /* File-backed address space mappings: some core files include |
132 | information about memory mapped files. */ | |
bb2a6777 | 133 | target_section_table m_core_file_mappings; |
db082f59 | 134 | |
973695d6 KB |
135 | /* Unavailable mappings. These correspond to pathnames which either |
136 | weren't found or could not be opened. Knowing these addresses can | |
137 | still be useful. */ | |
138 | std::vector<mem_range> m_core_unavailable_mappings; | |
139 | ||
db082f59 KB |
140 | /* Build m_core_file_mappings. Called from the constructor. */ |
141 | void build_file_mappings (); | |
142 | ||
973695d6 KB |
143 | /* Helper method for xfer_partial. */ |
144 | enum target_xfer_status xfer_memory_via_mappings (gdb_byte *readbuf, | |
145 | const gdb_byte *writebuf, | |
146 | ULONGEST offset, | |
147 | ULONGEST len, | |
148 | ULONGEST *xfered_len); | |
149 | ||
15244507 PA |
150 | /* FIXME: kettenis/20031023: Eventually this field should |
151 | disappear. */ | |
152 | struct gdbarch *m_core_gdbarch = NULL; | |
153 | }; | |
c906108c | 154 | |
15244507 PA |
155 | core_target::core_target () |
156 | { | |
134df964 LM |
157 | /* Find a first arch based on the BFD. We need the initial gdbarch so |
158 | we can setup the hooks to find a target description. */ | |
15244507 | 159 | m_core_gdbarch = gdbarch_from_bfd (core_bfd); |
2acceee2 | 160 | |
134df964 LM |
161 | /* If the arch is able to read a target description from the core, it |
162 | could yield a more specific gdbarch. */ | |
163 | const struct target_desc *tdesc = read_description (); | |
164 | ||
165 | if (tdesc != nullptr) | |
166 | { | |
167 | struct gdbarch_info info; | |
134df964 LM |
168 | info.abfd = core_bfd; |
169 | info.target_desc = tdesc; | |
170 | m_core_gdbarch = gdbarch_find_by_info (info); | |
171 | } | |
172 | ||
6ba0a321 CB |
173 | if (!m_core_gdbarch |
174 | || !gdbarch_iterate_over_regset_sections_p (m_core_gdbarch)) | |
175 | error (_("\"%s\": Core file format not supported"), | |
176 | bfd_get_filename (core_bfd)); | |
2acceee2 | 177 | |
15244507 | 178 | /* Find the data section */ |
2d128614 | 179 | m_core_section_table = build_section_table (core_bfd); |
db082f59 KB |
180 | |
181 | build_file_mappings (); | |
15244507 | 182 | } |
0e24ac5d | 183 | |
db082f59 KB |
184 | /* Construct the target_section_table for file-backed mappings if |
185 | they exist. | |
186 | ||
187 | For each unique path in the note, we'll open a BFD with a bfd | |
188 | target of "binary". This is an unstructured bfd target upon which | |
189 | we'll impose a structure from the mappings in the architecture-specific | |
190 | mappings note. A BFD section is allocated and initialized for each | |
191 | file-backed mapping. | |
192 | ||
193 | We take care to not share already open bfds with other parts of | |
194 | GDB; in particular, we don't want to add new sections to existing | |
195 | BFDs. We do, however, ensure that the BFDs that we allocate here | |
196 | will go away (be deallocated) when the core target is detached. */ | |
197 | ||
198 | void | |
199 | core_target::build_file_mappings () | |
200 | { | |
201 | std::unordered_map<std::string, struct bfd *> bfd_map; | |
973695d6 | 202 | std::unordered_set<std::string> unavailable_paths; |
db082f59 KB |
203 | |
204 | /* See linux_read_core_file_mappings() in linux-tdep.c for an example | |
205 | read_core_file_mappings method. */ | |
206 | gdbarch_read_core_file_mappings (m_core_gdbarch, core_bfd, | |
207 | ||
208 | /* After determining the number of mappings, read_core_file_mappings | |
bb2a6777 TT |
209 | will invoke this lambda. */ |
210 | [&] (ULONGEST) | |
db082f59 | 211 | { |
db082f59 KB |
212 | }, |
213 | ||
214 | /* read_core_file_mappings will invoke this lambda for each mapping | |
215 | that it finds. */ | |
216 | [&] (int num, ULONGEST start, ULONGEST end, ULONGEST file_ofs, | |
70125a45 | 217 | const char *filename) |
db082f59 KB |
218 | { |
219 | /* Architecture-specific read_core_mapping methods are expected to | |
220 | weed out non-file-backed mappings. */ | |
221 | gdb_assert (filename != nullptr); | |
222 | ||
223 | struct bfd *bfd = bfd_map[filename]; | |
224 | if (bfd == nullptr) | |
225 | { | |
226 | /* Use exec_file_find() to do sysroot expansion. It'll | |
227 | also strip the potential sysroot "target:" prefix. If | |
228 | there is no sysroot, an equivalent (possibly more | |
229 | canonical) pathname will be provided. */ | |
230 | gdb::unique_xmalloc_ptr<char> expanded_fname | |
231 | = exec_file_find (filename, NULL); | |
232 | if (expanded_fname == nullptr) | |
233 | { | |
973695d6 KB |
234 | m_core_unavailable_mappings.emplace_back (start, end - start); |
235 | /* Print just one warning per path. */ | |
236 | if (unavailable_paths.insert (filename).second) | |
237 | warning (_("Can't open file %s during file-backed mapping " | |
238 | "note processing"), | |
239 | filename); | |
db082f59 KB |
240 | return; |
241 | } | |
242 | ||
243 | bfd = bfd_map[filename] = bfd_openr (expanded_fname.get (), | |
dda83cd7 | 244 | "binary"); |
db082f59 KB |
245 | |
246 | if (bfd == nullptr || !bfd_check_format (bfd, bfd_object)) | |
247 | { | |
973695d6 | 248 | m_core_unavailable_mappings.emplace_back (start, end - start); |
db082f59 KB |
249 | /* If we get here, there's a good chance that it's due to |
250 | an internal error. We issue a warning instead of an | |
251 | internal error because of the possibility that the | |
252 | file was removed in between checking for its | |
253 | existence during the expansion in exec_file_find() | |
254 | and the calls to bfd_openr() / bfd_check_format(). | |
255 | Output both the path from the core file note along | |
256 | with its expansion to make debugging this problem | |
257 | easier. */ | |
258 | warning (_("Can't open file %s which was expanded to %s " | |
259 | "during file-backed mapping note processing"), | |
260 | filename, expanded_fname.get ()); | |
261 | if (bfd != nullptr) | |
262 | bfd_close (bfd); | |
263 | return; | |
264 | } | |
265 | /* Ensure that the bfd will be closed when core_bfd is closed. | |
266 | This can be checked before/after a core file detach via | |
267 | "maint info bfds". */ | |
268 | gdb_bfd_record_inclusion (core_bfd, bfd); | |
269 | } | |
270 | ||
271 | /* Make new BFD section. All sections have the same name, | |
272 | which is permitted by bfd_make_section_anyway(). */ | |
273 | asection *sec = bfd_make_section_anyway (bfd, "load"); | |
274 | if (sec == nullptr) | |
275 | error (_("Can't make section")); | |
276 | sec->filepos = file_ofs; | |
277 | bfd_set_section_flags (sec, SEC_READONLY | SEC_HAS_CONTENTS); | |
278 | bfd_set_section_size (sec, end - start); | |
279 | bfd_set_section_vma (sec, start); | |
280 | bfd_set_section_lma (sec, start); | |
281 | bfd_set_section_alignment (sec, 2); | |
282 | ||
283 | /* Set target_section fields. */ | |
6be2a9ab | 284 | m_core_file_mappings.emplace_back (start, end, sec); |
db082f59 | 285 | }); |
973695d6 KB |
286 | |
287 | normalize_mem_ranges (&m_core_unavailable_mappings); | |
15244507 | 288 | } |
0e24ac5d | 289 | |
7f9f62ba PA |
290 | /* An arbitrary identifier for the core inferior. */ |
291 | #define CORELOW_PID 1 | |
292 | ||
15244507 | 293 | /* Close the core target. */ |
c906108c | 294 | |
15244507 PA |
295 | void |
296 | core_target::close () | |
c906108c | 297 | { |
c906108c SS |
298 | if (core_bfd) |
299 | { | |
60db1b85 PA |
300 | switch_to_no_thread (); /* Avoid confusion from thread |
301 | stuff. */ | |
00431a78 | 302 | exit_inferior_silent (current_inferior ()); |
c906108c | 303 | |
aff410f1 | 304 | /* Clear out solib state while the bfd is still open. See |
dda83cd7 | 305 | comments in clear_solib in solib.c. */ |
a77053c2 | 306 | clear_solib (); |
7a292a7a | 307 | |
06333fea | 308 | current_program_space->cbfd.reset (nullptr); |
c906108c | 309 | } |
c906108c | 310 | |
15244507 PA |
311 | /* Core targets are heap-allocated (see core_target_open), so here |
312 | we delete ourselves. */ | |
313 | delete this; | |
74b7792f AC |
314 | } |
315 | ||
aff410f1 MS |
316 | /* Look for sections whose names start with `.reg/' so that we can |
317 | extract the list of threads in a core file. */ | |
c906108c SS |
318 | |
319 | static void | |
a190fabb | 320 | add_to_thread_list (asection *asect, asection *reg_sect) |
c906108c | 321 | { |
3cdd9356 PA |
322 | int core_tid; |
323 | int pid, lwpid; | |
9ab8741a | 324 | bool fake_pid_p = false; |
88f38a04 | 325 | struct inferior *inf; |
c906108c | 326 | |
fd361982 | 327 | if (!startswith (bfd_section_name (asect), ".reg/")) |
c906108c SS |
328 | return; |
329 | ||
fd361982 | 330 | core_tid = atoi (bfd_section_name (asect) + 5); |
c906108c | 331 | |
261b8d08 PA |
332 | pid = bfd_core_file_pid (core_bfd); |
333 | if (pid == 0) | |
3cdd9356 | 334 | { |
9ab8741a | 335 | fake_pid_p = true; |
3cdd9356 | 336 | pid = CORELOW_PID; |
3cdd9356 | 337 | } |
0de3b513 | 338 | |
261b8d08 PA |
339 | lwpid = core_tid; |
340 | ||
88f38a04 PA |
341 | inf = current_inferior (); |
342 | if (inf->pid == 0) | |
343 | { | |
344 | inferior_appeared (inf, pid); | |
345 | inf->fake_pid_p = fake_pid_p; | |
346 | } | |
3cdd9356 | 347 | |
60db1b85 | 348 | ptid_t ptid (pid, lwpid); |
3cdd9356 | 349 | |
60db1b85 | 350 | thread_info *thr = add_thread (inf->process_target (), ptid); |
c906108c SS |
351 | |
352 | /* Warning, Will Robinson, looking at BFD private data! */ | |
353 | ||
354 | if (reg_sect != NULL | |
aff410f1 | 355 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
60db1b85 | 356 | switch_to_thread (thr); /* Yes, make it current. */ |
c906108c SS |
357 | } |
358 | ||
451953fa PA |
359 | /* Issue a message saying we have no core to debug, if FROM_TTY. */ |
360 | ||
361 | static void | |
362 | maybe_say_no_core_file_now (int from_tty) | |
363 | { | |
364 | if (from_tty) | |
365 | printf_filtered (_("No core file now.\n")); | |
366 | } | |
367 | ||
30baf67b | 368 | /* Backward compatibility with old way of specifying core files. */ |
451953fa PA |
369 | |
370 | void | |
371 | core_file_command (const char *filename, int from_tty) | |
372 | { | |
373 | dont_repeat (); /* Either way, seems bogus. */ | |
374 | ||
375 | if (filename == NULL) | |
376 | { | |
377 | if (core_bfd != NULL) | |
378 | { | |
379 | target_detach (current_inferior (), from_tty); | |
380 | gdb_assert (core_bfd == NULL); | |
381 | } | |
382 | else | |
383 | maybe_say_no_core_file_now (from_tty); | |
384 | } | |
385 | else | |
386 | core_target_open (filename, from_tty); | |
387 | } | |
388 | ||
aa2d5a42 KS |
389 | /* Locate (and load) an executable file (and symbols) given the core file |
390 | BFD ABFD. */ | |
391 | ||
392 | static void | |
393 | locate_exec_from_corefile_build_id (bfd *abfd, int from_tty) | |
394 | { | |
395 | const bfd_build_id *build_id = build_id_bfd_get (abfd); | |
396 | if (build_id == nullptr) | |
397 | return; | |
398 | ||
399 | gdb_bfd_ref_ptr execbfd | |
400 | = build_id_to_exec_bfd (build_id->size, build_id->data); | |
401 | ||
402 | if (execbfd != nullptr) | |
403 | { | |
404 | exec_file_attach (bfd_get_filename (execbfd.get ()), from_tty); | |
405 | symbol_file_add_main (bfd_get_filename (execbfd.get ()), | |
406 | symfile_add_flag (from_tty ? SYMFILE_VERBOSE : 0)); | |
407 | } | |
408 | } | |
409 | ||
d9f719f1 | 410 | /* See gdbcore.h. */ |
c906108c | 411 | |
f6ac5f3d | 412 | void |
d9f719f1 | 413 | core_target_open (const char *arg, int from_tty) |
c906108c SS |
414 | { |
415 | const char *p; | |
416 | int siggy; | |
c906108c | 417 | int scratch_chan; |
ee28ca0f | 418 | int flags; |
c906108c SS |
419 | |
420 | target_preopen (from_tty); | |
014f9477 | 421 | if (!arg) |
c906108c | 422 | { |
8a3fe4f8 | 423 | if (core_bfd) |
3e43a32a MS |
424 | error (_("No core file specified. (Use `detach' " |
425 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
426 | else |
427 | error (_("No core file specified.")); | |
c906108c SS |
428 | } |
429 | ||
ee0c3293 TT |
430 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); |
431 | if (!IS_ABSOLUTE_PATH (filename.get ())) | |
ff8577f6 | 432 | filename = gdb_abspath (filename.get ()); |
c906108c | 433 | |
ee28ca0f AC |
434 | flags = O_BINARY | O_LARGEFILE; |
435 | if (write_files) | |
436 | flags |= O_RDWR; | |
437 | else | |
438 | flags |= O_RDONLY; | |
ee0c3293 | 439 | scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); |
c906108c | 440 | if (scratch_chan < 0) |
ee0c3293 | 441 | perror_with_name (filename.get ()); |
c906108c | 442 | |
ee0c3293 | 443 | gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename.get (), gnutarget, |
192b62ce TT |
444 | write_files ? FOPEN_RUB : FOPEN_RB, |
445 | scratch_chan)); | |
c906108c | 446 | if (temp_bfd == NULL) |
ee0c3293 | 447 | perror_with_name (filename.get ()); |
c906108c | 448 | |
6ba0a321 | 449 | if (!bfd_check_format (temp_bfd.get (), bfd_core)) |
c906108c SS |
450 | { |
451 | /* Do it after the err msg */ | |
aff410f1 | 452 | /* FIXME: should be checking for errors from bfd_close (for one |
dda83cd7 SM |
453 | thing, on error it does not free all the storage associated |
454 | with the bfd). */ | |
8a3fe4f8 | 455 | error (_("\"%s\" is not a core dump: %s"), |
ee0c3293 | 456 | filename.get (), bfd_errmsg (bfd_get_error ())); |
c906108c SS |
457 | } |
458 | ||
06333fea | 459 | current_program_space->cbfd = std::move (temp_bfd); |
c906108c | 460 | |
15244507 | 461 | core_target *target = new core_target (); |
0e24ac5d | 462 | |
15244507 PA |
463 | /* Own the target until it is successfully pushed. */ |
464 | target_ops_up target_holder (target); | |
2acceee2 | 465 | |
c906108c SS |
466 | validate_files (); |
467 | ||
2f1b5984 MK |
468 | /* If we have no exec file, try to set the architecture from the |
469 | core file. We don't do this unconditionally since an exec file | |
470 | typically contains more information that helps us determine the | |
471 | architecture than a core file. */ | |
7e10abd1 | 472 | if (!current_program_space->exec_bfd ()) |
2f1b5984 | 473 | set_gdbarch_from_file (core_bfd); |
cbda0a99 | 474 | |
02980c56 | 475 | current_inferior ()->push_target (std::move (target_holder)); |
c906108c | 476 | |
60db1b85 | 477 | switch_to_no_thread (); |
0de3b513 | 478 | |
739fc47a PA |
479 | /* Need to flush the register cache (and the frame cache) from a |
480 | previous debug session. If inferior_ptid ends up the same as the | |
481 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
482 | core2; core core1; core core2 --- then there's potential for | |
483 | get_current_regcache to return the cached regcache of the | |
484 | previous session, and the frame cache being stale. */ | |
485 | registers_changed (); | |
486 | ||
0de3b513 PA |
487 | /* Build up thread list from BFD sections, and possibly set the |
488 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 489 | section. */ |
a190fabb TT |
490 | asection *reg_sect = bfd_get_section_by_name (core_bfd, ".reg"); |
491 | for (asection *sect : gdb_bfd_sections (core_bfd)) | |
492 | add_to_thread_list (sect, reg_sect); | |
0de3b513 | 493 | |
d7e15655 | 494 | if (inferior_ptid == null_ptid) |
3cdd9356 PA |
495 | { |
496 | /* Either we found no .reg/NN section, and hence we have a | |
497 | non-threaded core (single-threaded, from gdb's perspective), | |
498 | or for some reason add_to_thread_list couldn't determine | |
499 | which was the "main" thread. The latter case shouldn't | |
500 | usually happen, but we're dealing with input here, which can | |
501 | always be broken in different ways. */ | |
00431a78 | 502 | thread_info *thread = first_thread_of_inferior (current_inferior ()); |
c5504eaf | 503 | |
3cdd9356 PA |
504 | if (thread == NULL) |
505 | { | |
c45ceae0 | 506 | inferior_appeared (current_inferior (), CORELOW_PID); |
60db1b85 | 507 | thread = add_thread_silent (target, ptid_t (CORELOW_PID)); |
3cdd9356 | 508 | } |
60db1b85 PA |
509 | |
510 | switch_to_thread (thread); | |
3cdd9356 PA |
511 | } |
512 | ||
7e10abd1 | 513 | if (current_program_space->exec_bfd () == nullptr) |
aa2d5a42 KS |
514 | locate_exec_from_corefile_build_id (core_bfd, from_tty); |
515 | ||
a7aba266 | 516 | post_create_inferior (from_tty); |
959b8724 | 517 | |
0de3b513 PA |
518 | /* Now go through the target stack looking for threads since there |
519 | may be a thread_stratum target loaded on top of target core by | |
520 | now. The layer above should claim threads found in the BFD | |
521 | sections. */ | |
a70b8144 | 522 | try |
8e7b59a5 | 523 | { |
e8032dde | 524 | target_update_thread_list (); |
8e7b59a5 KS |
525 | } |
526 | ||
230d2906 | 527 | catch (const gdb_exception_error &except) |
492d29ea PA |
528 | { |
529 | exception_print (gdb_stderr, except); | |
530 | } | |
0de3b513 | 531 | |
c906108c SS |
532 | p = bfd_core_file_failing_command (core_bfd); |
533 | if (p) | |
a3f17187 | 534 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c | 535 | |
0c557179 SDJ |
536 | /* Clearing any previous state of convenience variables. */ |
537 | clear_exit_convenience_vars (); | |
538 | ||
c906108c SS |
539 | siggy = bfd_core_file_failing_signal (core_bfd); |
540 | if (siggy > 0) | |
423ec54c | 541 | { |
15244507 PA |
542 | gdbarch *core_gdbarch = target->core_gdbarch (); |
543 | ||
22203bbf | 544 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
545 | core (map gdb_signal from host signals). If we do have |
546 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
547 | implementation for that gdbarch, as a fallback measure, | |
548 | assume the host signal mapping. It'll be correct for native | |
549 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 550 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
551 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
552 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
553 | siggy) | |
554 | : gdb_signal_from_host (siggy)); | |
423ec54c | 555 | |
ad97bfc5 | 556 | printf_filtered (_("Program terminated with signal %s, %s"), |
2d503272 | 557 | gdb_signal_to_name (sig), gdb_signal_to_string (sig)); |
ad97bfc5 JB |
558 | if (gdbarch_report_signal_info_p (core_gdbarch)) |
559 | gdbarch_report_signal_info (core_gdbarch, current_uiout, sig); | |
560 | printf_filtered (_(".\n")); | |
0c557179 SDJ |
561 | |
562 | /* Set the value of the internal variable $_exitsignal, | |
563 | which holds the signal uncaught by the inferior. */ | |
564 | set_internalvar_integer (lookup_internalvar ("_exitsignal"), | |
565 | siggy); | |
423ec54c | 566 | } |
c906108c | 567 | |
87ab71f0 PA |
568 | /* Fetch all registers from core file. */ |
569 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 570 | |
87ab71f0 PA |
571 | /* Now, set up the frame cache, and print the top of stack. */ |
572 | reinit_frame_cache (); | |
08d72866 | 573 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
f0e8c4c5 JK |
574 | |
575 | /* Current thread should be NUM 1 but the user does not know that. | |
576 | If a program is single threaded gdb in general does not mention | |
577 | anything about threads. That is why the test is >= 2. */ | |
5b6d1e4f | 578 | if (thread_count (target) >= 2) |
f0e8c4c5 | 579 | { |
a70b8144 | 580 | try |
f0e8c4c5 JK |
581 | { |
582 | thread_command (NULL, from_tty); | |
583 | } | |
230d2906 | 584 | catch (const gdb_exception_error &except) |
492d29ea PA |
585 | { |
586 | exception_print (gdb_stderr, except); | |
587 | } | |
f0e8c4c5 | 588 | } |
c906108c SS |
589 | } |
590 | ||
f6ac5f3d PA |
591 | void |
592 | core_target::detach (inferior *inf, int from_tty) | |
c906108c | 593 | { |
15244507 PA |
594 | /* Note that 'this' is dangling after this call. unpush_target |
595 | closes the target, and our close implementation deletes | |
596 | 'this'. */ | |
fadf6add | 597 | inf->unpush_target (this); |
15244507 | 598 | |
66452beb PW |
599 | /* Clear the register cache and the frame cache. */ |
600 | registers_changed (); | |
c906108c | 601 | reinit_frame_cache (); |
451953fa | 602 | maybe_say_no_core_file_now (from_tty); |
c906108c SS |
603 | } |
604 | ||
de57eccd | 605 | /* Try to retrieve registers from a section in core_bfd, and supply |
6ba0a321 | 606 | them to REGSET. |
de57eccd | 607 | |
11a33714 SM |
608 | If ptid's lwp member is zero, do the single-threaded |
609 | thing: look for a section named NAME. If ptid's lwp | |
0de3b513 PA |
610 | member is non-zero, do the multi-threaded thing: look for a section |
611 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
11a33714 | 612 | representation of ptid's lwp member. |
de57eccd JM |
613 | |
614 | HUMAN_NAME is a human-readable name for the kind of registers the | |
615 | NAME section contains, for use in error messages. | |
616 | ||
15244507 PA |
617 | If REQUIRED is true, print an error if the core file doesn't have a |
618 | section by the appropriate name. Otherwise, just do nothing. */ | |
de57eccd | 619 | |
15244507 PA |
620 | void |
621 | core_target::get_core_register_section (struct regcache *regcache, | |
622 | const struct regset *regset, | |
623 | const char *name, | |
dbd534fe | 624 | int section_min_size, |
15244507 PA |
625 | const char *human_name, |
626 | bool required) | |
de57eccd | 627 | { |
6ba0a321 CB |
628 | gdb_assert (regset != nullptr); |
629 | ||
7be0c536 | 630 | struct bfd_section *section; |
de57eccd | 631 | bfd_size_type size; |
6ba0a321 | 632 | bool variable_size_section = (regset->flags & REGSET_VARIABLE_SIZE); |
de57eccd | 633 | |
3c3ae77e | 634 | thread_section_name section_name (name, regcache->ptid ()); |
de57eccd | 635 | |
3c3ae77e | 636 | section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); |
de57eccd JM |
637 | if (! section) |
638 | { | |
639 | if (required) | |
aff410f1 MS |
640 | warning (_("Couldn't find %s registers in core file."), |
641 | human_name); | |
de57eccd JM |
642 | return; |
643 | } | |
644 | ||
fd361982 | 645 | size = bfd_section_size (section); |
dbd534fe | 646 | if (size < section_min_size) |
8f0435f7 | 647 | { |
3c3ae77e PA |
648 | warning (_("Section `%s' in core file too small."), |
649 | section_name.c_str ()); | |
8f0435f7 AA |
650 | return; |
651 | } | |
dbd534fe | 652 | if (size != section_min_size && !variable_size_section) |
f962539a AA |
653 | { |
654 | warning (_("Unexpected size of section `%s' in core file."), | |
3c3ae77e | 655 | section_name.c_str ()); |
f962539a | 656 | } |
8f0435f7 | 657 | |
0cac9354 | 658 | gdb::byte_vector contents (size); |
d8b2f9e3 SM |
659 | if (!bfd_get_section_contents (core_bfd, section, contents.data (), |
660 | (file_ptr) 0, size)) | |
de57eccd | 661 | { |
8a3fe4f8 | 662 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
3c3ae77e | 663 | human_name, section_name.c_str ()); |
de57eccd JM |
664 | return; |
665 | } | |
666 | ||
6ba0a321 | 667 | regset->supply_regset (regset, regcache, -1, contents.data (), size); |
de57eccd JM |
668 | } |
669 | ||
15244507 PA |
670 | /* Data passed to gdbarch_iterate_over_regset_sections's callback. */ |
671 | struct get_core_registers_cb_data | |
672 | { | |
673 | core_target *target; | |
674 | struct regcache *regcache; | |
675 | }; | |
676 | ||
5aa82d05 AA |
677 | /* Callback for get_core_registers that handles a single core file |
678 | register note section. */ | |
679 | ||
680 | static void | |
a616bb94 | 681 | get_core_registers_cb (const char *sect_name, int supply_size, int collect_size, |
8f0435f7 | 682 | const struct regset *regset, |
5aa82d05 AA |
683 | const char *human_name, void *cb_data) |
684 | { | |
6ba0a321 CB |
685 | gdb_assert (regset != nullptr); |
686 | ||
15244507 PA |
687 | auto *data = (get_core_registers_cb_data *) cb_data; |
688 | bool required = false; | |
6ba0a321 | 689 | bool variable_size_section = (regset->flags & REGSET_VARIABLE_SIZE); |
a616bb94 AH |
690 | |
691 | if (!variable_size_section) | |
692 | gdb_assert (supply_size == collect_size); | |
5aa82d05 AA |
693 | |
694 | if (strcmp (sect_name, ".reg") == 0) | |
8f0435f7 | 695 | { |
15244507 | 696 | required = true; |
8f0435f7 AA |
697 | if (human_name == NULL) |
698 | human_name = "general-purpose"; | |
699 | } | |
5aa82d05 | 700 | else if (strcmp (sect_name, ".reg2") == 0) |
8f0435f7 AA |
701 | { |
702 | if (human_name == NULL) | |
703 | human_name = "floating-point"; | |
704 | } | |
705 | ||
15244507 | 706 | data->target->get_core_register_section (data->regcache, regset, sect_name, |
6ba0a321 | 707 | supply_size, human_name, required); |
5aa82d05 | 708 | } |
de57eccd | 709 | |
c906108c SS |
710 | /* Get the registers out of a core file. This is the machine- |
711 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
712 | part, typically implemented in the xm-file for each |
713 | architecture. */ | |
c906108c SS |
714 | |
715 | /* We just get all the registers, so we don't use regno. */ | |
716 | ||
f6ac5f3d PA |
717 | void |
718 | core_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 719 | { |
15244507 | 720 | if (!(m_core_gdbarch != nullptr |
6ba0a321 | 721 | && gdbarch_iterate_over_regset_sections_p (m_core_gdbarch))) |
c906108c SS |
722 | { |
723 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 724 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
725 | return; |
726 | } | |
727 | ||
6ba0a321 CB |
728 | struct gdbarch *gdbarch = regcache->arch (); |
729 | get_core_registers_cb_data data = { this, regcache }; | |
730 | gdbarch_iterate_over_regset_sections (gdbarch, | |
731 | get_core_registers_cb, | |
732 | (void *) &data, NULL); | |
c906108c | 733 | |
ee99023e | 734 | /* Mark all registers not found in the core as unavailable. */ |
6ba0a321 | 735 | for (int i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
0ec9f114 | 736 | if (regcache->get_register_status (i) == REG_UNKNOWN) |
73e1c03f | 737 | regcache->raw_supply (i, NULL); |
c906108c SS |
738 | } |
739 | ||
f6ac5f3d PA |
740 | void |
741 | core_target::files_info () | |
c906108c | 742 | { |
15244507 | 743 | print_section_info (&m_core_section_table, core_bfd); |
c906108c | 744 | } |
e2544d02 | 745 | \f |
973695d6 KB |
746 | /* Helper method for core_target::xfer_partial. */ |
747 | ||
748 | enum target_xfer_status | |
749 | core_target::xfer_memory_via_mappings (gdb_byte *readbuf, | |
750 | const gdb_byte *writebuf, | |
751 | ULONGEST offset, ULONGEST len, | |
752 | ULONGEST *xfered_len) | |
753 | { | |
754 | enum target_xfer_status xfer_status; | |
755 | ||
756 | xfer_status = (section_table_xfer_memory_partial | |
757 | (readbuf, writebuf, | |
758 | offset, len, xfered_len, | |
bb2a6777 | 759 | m_core_file_mappings)); |
973695d6 KB |
760 | |
761 | if (xfer_status == TARGET_XFER_OK || m_core_unavailable_mappings.empty ()) | |
762 | return xfer_status; | |
763 | ||
764 | /* There are instances - e.g. when debugging within a docker | |
765 | container using the AUFS storage driver - where the pathnames | |
766 | obtained from the note section are incorrect. Despite the path | |
767 | being wrong, just knowing the start and end addresses of the | |
768 | mappings is still useful; we can attempt an access of the file | |
769 | stratum constrained to the address ranges corresponding to the | |
770 | unavailable mappings. */ | |
771 | ||
772 | ULONGEST memaddr = offset; | |
773 | ULONGEST memend = offset + len; | |
774 | ||
775 | for (const auto &mr : m_core_unavailable_mappings) | |
776 | { | |
777 | if (address_in_mem_range (memaddr, &mr)) | |
dda83cd7 | 778 | { |
973695d6 KB |
779 | if (!address_in_mem_range (memend, &mr)) |
780 | len = mr.start + mr.length - memaddr; | |
781 | ||
782 | xfer_status = this->beneath ()->xfer_partial (TARGET_OBJECT_MEMORY, | |
783 | NULL, | |
784 | readbuf, | |
785 | writebuf, | |
786 | offset, | |
787 | len, | |
788 | xfered_len); | |
789 | break; | |
790 | } | |
791 | } | |
792 | ||
793 | return xfer_status; | |
794 | } | |
795 | ||
f6ac5f3d PA |
796 | enum target_xfer_status |
797 | core_target::xfer_partial (enum target_object object, const char *annex, | |
798 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
799 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
e2544d02 RM |
800 | { |
801 | switch (object) | |
802 | { | |
803 | case TARGET_OBJECT_MEMORY: | |
2735d421 KB |
804 | { |
805 | enum target_xfer_status xfer_status; | |
806 | ||
807 | /* Try accessing memory contents from core file data, | |
808 | restricting consideration to those sections for which | |
809 | the BFD section flag SEC_HAS_CONTENTS is set. */ | |
810 | auto has_contents_cb = [] (const struct target_section *s) | |
811 | { | |
812 | return ((s->the_bfd_section->flags & SEC_HAS_CONTENTS) != 0); | |
813 | }; | |
814 | xfer_status = section_table_xfer_memory_partial | |
815 | (readbuf, writebuf, | |
816 | offset, len, xfered_len, | |
bb2a6777 | 817 | m_core_section_table, |
2735d421 KB |
818 | has_contents_cb); |
819 | if (xfer_status == TARGET_XFER_OK) | |
820 | return TARGET_XFER_OK; | |
821 | ||
db082f59 KB |
822 | /* Check file backed mappings. If they're available, use |
823 | core file provided mappings (e.g. from .note.linuxcore.file | |
824 | or the like) as this should provide a more accurate | |
825 | result. If not, check the stratum beneath us, which should | |
1bd57575 LM |
826 | be the file stratum. |
827 | ||
828 | We also check unavailable mappings due to Docker/AUFS driver | |
829 | issues. */ | |
830 | if (!m_core_file_mappings.empty () | |
831 | || !m_core_unavailable_mappings.empty ()) | |
832 | { | |
833 | xfer_status = xfer_memory_via_mappings (readbuf, writebuf, offset, | |
834 | len, xfered_len); | |
835 | } | |
db082f59 KB |
836 | else |
837 | xfer_status = this->beneath ()->xfer_partial (object, annex, readbuf, | |
838 | writebuf, offset, len, | |
839 | xfered_len); | |
2735d421 KB |
840 | if (xfer_status == TARGET_XFER_OK) |
841 | return TARGET_XFER_OK; | |
e2544d02 | 842 | |
2735d421 KB |
843 | /* Finally, attempt to access data in core file sections with |
844 | no contents. These will typically read as all zero. */ | |
845 | auto no_contents_cb = [&] (const struct target_section *s) | |
846 | { | |
847 | return !has_contents_cb (s); | |
848 | }; | |
849 | xfer_status = section_table_xfer_memory_partial | |
850 | (readbuf, writebuf, | |
851 | offset, len, xfered_len, | |
bb2a6777 | 852 | m_core_section_table, |
2735d421 KB |
853 | no_contents_cb); |
854 | ||
855 | return xfer_status; | |
856 | } | |
e2544d02 RM |
857 | case TARGET_OBJECT_AUXV: |
858 | if (readbuf) | |
859 | { | |
860 | /* When the aux vector is stored in core file, BFD | |
861 | represents this with a fake section called ".auxv". */ | |
862 | ||
c4c5b7ba | 863 | struct bfd_section *section; |
e2544d02 | 864 | bfd_size_type size; |
e2544d02 RM |
865 | |
866 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
867 | if (section == NULL) | |
2ed4b548 | 868 | return TARGET_XFER_E_IO; |
e2544d02 | 869 | |
fd361982 | 870 | size = bfd_section_size (section); |
e2544d02 | 871 | if (offset >= size) |
9b409511 | 872 | return TARGET_XFER_EOF; |
e2544d02 RM |
873 | size -= offset; |
874 | if (size > len) | |
875 | size = len; | |
9b409511 YQ |
876 | |
877 | if (size == 0) | |
878 | return TARGET_XFER_EOF; | |
879 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
880 | (file_ptr) offset, size)) | |
e2544d02 | 881 | { |
8a3fe4f8 | 882 | warning (_("Couldn't read NT_AUXV note in core file.")); |
2ed4b548 | 883 | return TARGET_XFER_E_IO; |
e2544d02 RM |
884 | } |
885 | ||
9b409511 YQ |
886 | *xfered_len = (ULONGEST) size; |
887 | return TARGET_XFER_OK; | |
e2544d02 | 888 | } |
2ed4b548 | 889 | return TARGET_XFER_E_IO; |
e2544d02 | 890 | |
403e1656 MK |
891 | case TARGET_OBJECT_WCOOKIE: |
892 | if (readbuf) | |
893 | { | |
894 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
895 | represents this with a fake section called |
896 | ".wcookie". */ | |
403e1656 MK |
897 | |
898 | struct bfd_section *section; | |
899 | bfd_size_type size; | |
403e1656 MK |
900 | |
901 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
902 | if (section == NULL) | |
2ed4b548 | 903 | return TARGET_XFER_E_IO; |
403e1656 | 904 | |
fd361982 | 905 | size = bfd_section_size (section); |
403e1656 | 906 | if (offset >= size) |
96c4f946 | 907 | return TARGET_XFER_EOF; |
403e1656 MK |
908 | size -= offset; |
909 | if (size > len) | |
910 | size = len; | |
9b409511 YQ |
911 | |
912 | if (size == 0) | |
913 | return TARGET_XFER_EOF; | |
914 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
915 | (file_ptr) offset, size)) | |
403e1656 | 916 | { |
8a3fe4f8 | 917 | warning (_("Couldn't read StackGhost cookie in core file.")); |
2ed4b548 | 918 | return TARGET_XFER_E_IO; |
403e1656 MK |
919 | } |
920 | ||
9b409511 YQ |
921 | *xfered_len = (ULONGEST) size; |
922 | return TARGET_XFER_OK; | |
923 | ||
403e1656 | 924 | } |
2ed4b548 | 925 | return TARGET_XFER_E_IO; |
403e1656 | 926 | |
de584861 | 927 | case TARGET_OBJECT_LIBRARIES: |
15244507 PA |
928 | if (m_core_gdbarch != nullptr |
929 | && gdbarch_core_xfer_shared_libraries_p (m_core_gdbarch)) | |
de584861 PA |
930 | { |
931 | if (writebuf) | |
2ed4b548 | 932 | return TARGET_XFER_E_IO; |
9b409511 YQ |
933 | else |
934 | { | |
15244507 | 935 | *xfered_len = gdbarch_core_xfer_shared_libraries (m_core_gdbarch, |
9b409511 YQ |
936 | readbuf, |
937 | offset, len); | |
938 | ||
939 | if (*xfered_len == 0) | |
940 | return TARGET_XFER_EOF; | |
941 | else | |
942 | return TARGET_XFER_OK; | |
943 | } | |
de584861 PA |
944 | } |
945 | /* FALL THROUGH */ | |
946 | ||
356a5233 | 947 | case TARGET_OBJECT_LIBRARIES_AIX: |
15244507 PA |
948 | if (m_core_gdbarch != nullptr |
949 | && gdbarch_core_xfer_shared_libraries_aix_p (m_core_gdbarch)) | |
356a5233 JB |
950 | { |
951 | if (writebuf) | |
2ed4b548 | 952 | return TARGET_XFER_E_IO; |
9b409511 YQ |
953 | else |
954 | { | |
955 | *xfered_len | |
15244507 | 956 | = gdbarch_core_xfer_shared_libraries_aix (m_core_gdbarch, |
9b409511 YQ |
957 | readbuf, offset, |
958 | len); | |
959 | ||
960 | if (*xfered_len == 0) | |
961 | return TARGET_XFER_EOF; | |
962 | else | |
963 | return TARGET_XFER_OK; | |
964 | } | |
356a5233 JB |
965 | } |
966 | /* FALL THROUGH */ | |
967 | ||
9015683b TT |
968 | case TARGET_OBJECT_SIGNAL_INFO: |
969 | if (readbuf) | |
9b409511 | 970 | { |
15244507 PA |
971 | if (m_core_gdbarch != nullptr |
972 | && gdbarch_core_xfer_siginfo_p (m_core_gdbarch)) | |
9b409511 | 973 | { |
15244507 | 974 | LONGEST l = gdbarch_core_xfer_siginfo (m_core_gdbarch, readbuf, |
382b69bb JB |
975 | offset, len); |
976 | ||
977 | if (l >= 0) | |
978 | { | |
979 | *xfered_len = l; | |
980 | if (l == 0) | |
981 | return TARGET_XFER_EOF; | |
982 | else | |
983 | return TARGET_XFER_OK; | |
984 | } | |
9b409511 YQ |
985 | } |
986 | } | |
2ed4b548 | 987 | return TARGET_XFER_E_IO; |
9015683b | 988 | |
e2544d02 | 989 | default: |
b6a8c27b PA |
990 | return this->beneath ()->xfer_partial (object, annex, readbuf, |
991 | writebuf, offset, len, | |
992 | xfered_len); | |
e2544d02 RM |
993 | } |
994 | } | |
995 | ||
c906108c | 996 | \f |
c906108c SS |
997 | |
998 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
999 | exactly lively, are they? On the other hand, if we don't claim | |
1000 | that each & every one is alive, then we don't get any of them | |
1001 | to appear in an "info thread" command, which is quite a useful | |
1002 | behaviour. | |
c5aa993b | 1003 | */ |
57810aa7 | 1004 | bool |
f6ac5f3d | 1005 | core_target::thread_alive (ptid_t ptid) |
c906108c | 1006 | { |
57810aa7 | 1007 | return true; |
c906108c SS |
1008 | } |
1009 | ||
4eb0ad19 DJ |
1010 | /* Ask the current architecture what it knows about this core file. |
1011 | That will be used, in turn, to pick a better architecture. This | |
1012 | wrapper could be avoided if targets got a chance to specialize | |
15244507 | 1013 | core_target. */ |
4eb0ad19 | 1014 | |
f6ac5f3d PA |
1015 | const struct target_desc * |
1016 | core_target::read_description () | |
4eb0ad19 | 1017 | { |
95ce627a AB |
1018 | /* If the core file contains a target description note then we will use |
1019 | that in preference to anything else. */ | |
1020 | bfd_size_type tdesc_note_size = 0; | |
1021 | struct bfd_section *tdesc_note_section | |
1022 | = bfd_get_section_by_name (core_bfd, ".gdb-tdesc"); | |
1023 | if (tdesc_note_section != nullptr) | |
1024 | tdesc_note_size = bfd_section_size (tdesc_note_section); | |
1025 | if (tdesc_note_size > 0) | |
1026 | { | |
1027 | gdb::char_vector contents (tdesc_note_size + 1); | |
1028 | if (bfd_get_section_contents (core_bfd, tdesc_note_section, | |
1029 | contents.data (), (file_ptr) 0, | |
1030 | tdesc_note_size)) | |
1031 | { | |
1032 | /* Ensure we have a null terminator. */ | |
1033 | contents[tdesc_note_size] = '\0'; | |
1034 | const struct target_desc *result | |
1035 | = string_read_description_xml (contents.data ()); | |
1036 | if (result != nullptr) | |
1037 | return result; | |
1038 | } | |
1039 | } | |
1040 | ||
15244507 | 1041 | if (m_core_gdbarch && gdbarch_core_read_description_p (m_core_gdbarch)) |
2117c711 TT |
1042 | { |
1043 | const struct target_desc *result; | |
1044 | ||
15244507 | 1045 | result = gdbarch_core_read_description (m_core_gdbarch, this, core_bfd); |
2117c711 TT |
1046 | if (result != NULL) |
1047 | return result; | |
1048 | } | |
4eb0ad19 | 1049 | |
b6a8c27b | 1050 | return this->beneath ()->read_description (); |
4eb0ad19 DJ |
1051 | } |
1052 | ||
a068643d | 1053 | std::string |
f6ac5f3d | 1054 | core_target::pid_to_str (ptid_t ptid) |
0de3b513 | 1055 | { |
88f38a04 | 1056 | struct inferior *inf; |
a5ee0f0c | 1057 | int pid; |
0de3b513 | 1058 | |
a5ee0f0c PA |
1059 | /* The preferred way is to have a gdbarch/OS specific |
1060 | implementation. */ | |
15244507 PA |
1061 | if (m_core_gdbarch != nullptr |
1062 | && gdbarch_core_pid_to_str_p (m_core_gdbarch)) | |
1063 | return gdbarch_core_pid_to_str (m_core_gdbarch, ptid); | |
c5504eaf | 1064 | |
a5ee0f0c PA |
1065 | /* Otherwise, if we don't have one, we'll just fallback to |
1066 | "process", with normal_pid_to_str. */ | |
28439f5e | 1067 | |
a5ee0f0c | 1068 | /* Try the LWPID field first. */ |
e38504b3 | 1069 | pid = ptid.lwp (); |
a5ee0f0c | 1070 | if (pid != 0) |
f2907e49 | 1071 | return normal_pid_to_str (ptid_t (pid)); |
a5ee0f0c PA |
1072 | |
1073 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
1074 | only if it isn't a fake PID. */ | |
5b6d1e4f | 1075 | inf = find_inferior_ptid (this, ptid); |
88f38a04 | 1076 | if (inf != NULL && !inf->fake_pid_p) |
a5ee0f0c | 1077 | return normal_pid_to_str (ptid); |
0de3b513 | 1078 | |
a5ee0f0c | 1079 | /* No luck. We simply don't have a valid PID to print. */ |
a068643d | 1080 | return "<main task>"; |
0de3b513 PA |
1081 | } |
1082 | ||
f6ac5f3d PA |
1083 | const char * |
1084 | core_target::thread_name (struct thread_info *thr) | |
4dfc5dbc | 1085 | { |
15244507 PA |
1086 | if (m_core_gdbarch != nullptr |
1087 | && gdbarch_core_thread_name_p (m_core_gdbarch)) | |
1088 | return gdbarch_core_thread_name (m_core_gdbarch, thr); | |
4dfc5dbc JB |
1089 | return NULL; |
1090 | } | |
1091 | ||
57810aa7 | 1092 | bool |
f6ac5f3d | 1093 | core_target::has_memory () |
c35b1492 PA |
1094 | { |
1095 | return (core_bfd != NULL); | |
1096 | } | |
1097 | ||
57810aa7 | 1098 | bool |
f6ac5f3d | 1099 | core_target::has_stack () |
c35b1492 PA |
1100 | { |
1101 | return (core_bfd != NULL); | |
1102 | } | |
1103 | ||
57810aa7 | 1104 | bool |
f6ac5f3d | 1105 | core_target::has_registers () |
c35b1492 PA |
1106 | { |
1107 | return (core_bfd != NULL); | |
1108 | } | |
1109 | ||
451b7c33 TT |
1110 | /* Implement the to_info_proc method. */ |
1111 | ||
f6ac5f3d PA |
1112 | bool |
1113 | core_target::info_proc (const char *args, enum info_proc_what request) | |
451b7c33 TT |
1114 | { |
1115 | struct gdbarch *gdbarch = get_current_arch (); | |
1116 | ||
1117 | /* Since this is the core file target, call the 'core_info_proc' | |
1118 | method on gdbarch, not 'info_proc'. */ | |
1119 | if (gdbarch_core_info_proc_p (gdbarch)) | |
1120 | gdbarch_core_info_proc (gdbarch, args, request); | |
c906108c | 1121 | |
f6ac5f3d | 1122 | return true; |
c906108c SS |
1123 | } |
1124 | ||
09c2f5d4 KB |
1125 | /* Get a pointer to the current core target. If not connected to a |
1126 | core target, return NULL. */ | |
1127 | ||
1128 | static core_target * | |
1129 | get_current_core_target () | |
1130 | { | |
1131 | target_ops *proc_target = current_inferior ()->process_target (); | |
1132 | return dynamic_cast<core_target *> (proc_target); | |
1133 | } | |
1134 | ||
1135 | /* Display file backed mappings from core file. */ | |
1136 | ||
1137 | void | |
1138 | core_target::info_proc_mappings (struct gdbarch *gdbarch) | |
1139 | { | |
d7a78e5c | 1140 | if (!m_core_file_mappings.empty ()) |
09c2f5d4 KB |
1141 | { |
1142 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1143 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1144 | { | |
1145 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1146 | "Start Addr", | |
1147 | " End Addr", | |
1148 | " Size", " Offset", "objfile"); | |
1149 | } | |
1150 | else | |
1151 | { | |
1152 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1153 | "Start Addr", | |
1154 | " End Addr", | |
1155 | " Size", " Offset", "objfile"); | |
1156 | } | |
1157 | } | |
1158 | ||
d7a78e5c | 1159 | for (const target_section &tsp : m_core_file_mappings) |
09c2f5d4 | 1160 | { |
bb2a6777 TT |
1161 | ULONGEST start = tsp.addr; |
1162 | ULONGEST end = tsp.endaddr; | |
1163 | ULONGEST file_ofs = tsp.the_bfd_section->filepos; | |
1164 | const char *filename = bfd_get_filename (tsp.the_bfd_section->owner); | |
09c2f5d4 KB |
1165 | |
1166 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1167 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1168 | paddress (gdbarch, start), | |
1169 | paddress (gdbarch, end), | |
1170 | hex_string (end - start), | |
1171 | hex_string (file_ofs), | |
1172 | filename); | |
1173 | else | |
1174 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1175 | paddress (gdbarch, start), | |
1176 | paddress (gdbarch, end), | |
1177 | hex_string (end - start), | |
1178 | hex_string (file_ofs), | |
1179 | filename); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | /* Implement "maintenance print core-file-backed-mappings" command. | |
1184 | ||
1185 | If mappings are loaded, the results should be similar to the | |
1186 | mappings shown by "info proc mappings". This command is mainly a | |
1187 | debugging tool for GDB developers to make sure that the expected | |
1188 | mappings are present after loading a core file. For Linux, the | |
1189 | output provided by this command will be very similar (if not | |
1190 | identical) to that provided by "info proc mappings". This is not | |
1191 | necessarily the case for other OSes which might provide | |
1192 | more/different information in the "info proc mappings" output. */ | |
1193 | ||
1194 | static void | |
1195 | maintenance_print_core_file_backed_mappings (const char *args, int from_tty) | |
1196 | { | |
1197 | core_target *targ = get_current_core_target (); | |
1198 | if (targ != nullptr) | |
1199 | targ->info_proc_mappings (targ->core_gdbarch ()); | |
1200 | } | |
1201 | ||
6c265988 | 1202 | void _initialize_corelow (); |
c906108c | 1203 | void |
6c265988 | 1204 | _initialize_corelow () |
c906108c | 1205 | { |
d9f719f1 | 1206 | add_target (core_target_info, core_target_open, filename_completer); |
09c2f5d4 | 1207 | add_cmd ("core-file-backed-mappings", class_maintenance, |
dda83cd7 | 1208 | maintenance_print_core_file_backed_mappings, |
513487e1 | 1209 | _("Print core file's file-backed mappings."), |
09c2f5d4 | 1210 | &maintenanceprintlist); |
c906108c | 1211 | } |