Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
b811d2c2 | 3 | Copyright (C) 1986-2020 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" | |
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" |
8e860359 | 52 | |
ee28ca0f AC |
53 | #ifndef O_LARGEFILE |
54 | #define O_LARGEFILE 0 | |
55 | #endif | |
56 | ||
f6ac5f3d PA |
57 | /* The core file target. */ |
58 | ||
d9f719f1 PA |
59 | static const target_info core_target_info = { |
60 | "core", | |
61 | N_("Local core dump file"), | |
590042fc PW |
62 | N_("Use a core file as a target.\n\ |
63 | Specify the filename of the core file.") | |
d9f719f1 PA |
64 | }; |
65 | ||
3b3dac9b | 66 | class core_target final : public process_stratum_target |
f6ac5f3d PA |
67 | { |
68 | public: | |
15244507 PA |
69 | core_target (); |
70 | ~core_target () override; | |
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. */ | |
129 | target_section_table m_core_section_table {}; | |
130 | ||
db082f59 KB |
131 | /* File-backed address space mappings: some core files include |
132 | information about memory mapped files. */ | |
133 | target_section_table m_core_file_mappings {}; | |
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 | { | |
15244507 | 157 | m_core_gdbarch = gdbarch_from_bfd (core_bfd); |
2acceee2 | 158 | |
6ba0a321 CB |
159 | if (!m_core_gdbarch |
160 | || !gdbarch_iterate_over_regset_sections_p (m_core_gdbarch)) | |
161 | error (_("\"%s\": Core file format not supported"), | |
162 | bfd_get_filename (core_bfd)); | |
2acceee2 | 163 | |
15244507 PA |
164 | /* Find the data section */ |
165 | if (build_section_table (core_bfd, | |
166 | &m_core_section_table.sections, | |
167 | &m_core_section_table.sections_end)) | |
168 | error (_("\"%s\": Can't find sections: %s"), | |
169 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
db082f59 KB |
170 | |
171 | build_file_mappings (); | |
15244507 | 172 | } |
0e24ac5d | 173 | |
15244507 PA |
174 | core_target::~core_target () |
175 | { | |
176 | xfree (m_core_section_table.sections); | |
db082f59 KB |
177 | xfree (m_core_file_mappings.sections); |
178 | } | |
179 | ||
180 | /* Construct the target_section_table for file-backed mappings if | |
181 | they exist. | |
182 | ||
183 | For each unique path in the note, we'll open a BFD with a bfd | |
184 | target of "binary". This is an unstructured bfd target upon which | |
185 | we'll impose a structure from the mappings in the architecture-specific | |
186 | mappings note. A BFD section is allocated and initialized for each | |
187 | file-backed mapping. | |
188 | ||
189 | We take care to not share already open bfds with other parts of | |
190 | GDB; in particular, we don't want to add new sections to existing | |
191 | BFDs. We do, however, ensure that the BFDs that we allocate here | |
192 | will go away (be deallocated) when the core target is detached. */ | |
193 | ||
194 | void | |
195 | core_target::build_file_mappings () | |
196 | { | |
197 | std::unordered_map<std::string, struct bfd *> bfd_map; | |
973695d6 | 198 | std::unordered_set<std::string> unavailable_paths; |
db082f59 KB |
199 | |
200 | /* See linux_read_core_file_mappings() in linux-tdep.c for an example | |
201 | read_core_file_mappings method. */ | |
202 | gdbarch_read_core_file_mappings (m_core_gdbarch, core_bfd, | |
203 | ||
204 | /* After determining the number of mappings, read_core_file_mappings | |
205 | will invoke this lambda which allocates target_section storage for | |
206 | the mappings. */ | |
207 | [&] (ULONGEST count) | |
208 | { | |
209 | m_core_file_mappings.sections = XNEWVEC (struct target_section, count); | |
210 | m_core_file_mappings.sections_end = m_core_file_mappings.sections; | |
211 | }, | |
212 | ||
213 | /* read_core_file_mappings will invoke this lambda for each mapping | |
214 | that it finds. */ | |
215 | [&] (int num, ULONGEST start, ULONGEST end, ULONGEST file_ofs, | |
216 | const char *filename, const void *other) | |
217 | { | |
218 | /* Architecture-specific read_core_mapping methods are expected to | |
219 | weed out non-file-backed mappings. */ | |
220 | gdb_assert (filename != nullptr); | |
221 | ||
222 | struct bfd *bfd = bfd_map[filename]; | |
223 | if (bfd == nullptr) | |
224 | { | |
225 | /* Use exec_file_find() to do sysroot expansion. It'll | |
226 | also strip the potential sysroot "target:" prefix. If | |
227 | there is no sysroot, an equivalent (possibly more | |
228 | canonical) pathname will be provided. */ | |
229 | gdb::unique_xmalloc_ptr<char> expanded_fname | |
230 | = exec_file_find (filename, NULL); | |
231 | if (expanded_fname == nullptr) | |
232 | { | |
973695d6 KB |
233 | m_core_unavailable_mappings.emplace_back (start, end - start); |
234 | /* Print just one warning per path. */ | |
235 | if (unavailable_paths.insert (filename).second) | |
236 | warning (_("Can't open file %s during file-backed mapping " | |
237 | "note processing"), | |
238 | filename); | |
db082f59 KB |
239 | return; |
240 | } | |
241 | ||
242 | bfd = bfd_map[filename] = bfd_openr (expanded_fname.get (), | |
243 | "binary"); | |
244 | ||
245 | if (bfd == nullptr || !bfd_check_format (bfd, bfd_object)) | |
246 | { | |
973695d6 | 247 | m_core_unavailable_mappings.emplace_back (start, end - start); |
db082f59 KB |
248 | /* If we get here, there's a good chance that it's due to |
249 | an internal error. We issue a warning instead of an | |
250 | internal error because of the possibility that the | |
251 | file was removed in between checking for its | |
252 | existence during the expansion in exec_file_find() | |
253 | and the calls to bfd_openr() / bfd_check_format(). | |
254 | Output both the path from the core file note along | |
255 | with its expansion to make debugging this problem | |
256 | easier. */ | |
257 | warning (_("Can't open file %s which was expanded to %s " | |
258 | "during file-backed mapping note processing"), | |
259 | filename, expanded_fname.get ()); | |
260 | if (bfd != nullptr) | |
261 | bfd_close (bfd); | |
262 | return; | |
263 | } | |
264 | /* Ensure that the bfd will be closed when core_bfd is closed. | |
265 | This can be checked before/after a core file detach via | |
266 | "maint info bfds". */ | |
267 | gdb_bfd_record_inclusion (core_bfd, bfd); | |
268 | } | |
269 | ||
270 | /* Make new BFD section. All sections have the same name, | |
271 | which is permitted by bfd_make_section_anyway(). */ | |
272 | asection *sec = bfd_make_section_anyway (bfd, "load"); | |
273 | if (sec == nullptr) | |
274 | error (_("Can't make section")); | |
275 | sec->filepos = file_ofs; | |
276 | bfd_set_section_flags (sec, SEC_READONLY | SEC_HAS_CONTENTS); | |
277 | bfd_set_section_size (sec, end - start); | |
278 | bfd_set_section_vma (sec, start); | |
279 | bfd_set_section_lma (sec, start); | |
280 | bfd_set_section_alignment (sec, 2); | |
281 | ||
282 | /* Set target_section fields. */ | |
283 | struct target_section *ts = m_core_file_mappings.sections_end++; | |
284 | ts->addr = start; | |
285 | ts->endaddr = end; | |
286 | ts->owner = nullptr; | |
287 | ts->the_bfd_section = sec; | |
288 | }); | |
973695d6 KB |
289 | |
290 | normalize_mem_ranges (&m_core_unavailable_mappings); | |
15244507 | 291 | } |
0e24ac5d | 292 | |
4efb68b1 | 293 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 294 | |
7f9f62ba PA |
295 | /* An arbitrary identifier for the core inferior. */ |
296 | #define CORELOW_PID 1 | |
297 | ||
15244507 | 298 | /* Close the core target. */ |
c906108c | 299 | |
15244507 PA |
300 | void |
301 | core_target::close () | |
c906108c | 302 | { |
c906108c SS |
303 | if (core_bfd) |
304 | { | |
60db1b85 PA |
305 | switch_to_no_thread (); /* Avoid confusion from thread |
306 | stuff. */ | |
00431a78 | 307 | exit_inferior_silent (current_inferior ()); |
c906108c | 308 | |
aff410f1 MS |
309 | /* Clear out solib state while the bfd is still open. See |
310 | comments in clear_solib in solib.c. */ | |
a77053c2 | 311 | clear_solib (); |
7a292a7a | 312 | |
06333fea | 313 | current_program_space->cbfd.reset (nullptr); |
c906108c | 314 | } |
c906108c | 315 | |
15244507 PA |
316 | /* Core targets are heap-allocated (see core_target_open), so here |
317 | we delete ourselves. */ | |
318 | delete this; | |
74b7792f AC |
319 | } |
320 | ||
aff410f1 MS |
321 | /* Look for sections whose names start with `.reg/' so that we can |
322 | extract the list of threads in a core file. */ | |
c906108c SS |
323 | |
324 | static void | |
4efb68b1 | 325 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 326 | { |
3cdd9356 PA |
327 | int core_tid; |
328 | int pid, lwpid; | |
c906108c | 329 | asection *reg_sect = (asection *) reg_sect_arg; |
9ab8741a | 330 | bool fake_pid_p = false; |
88f38a04 | 331 | struct inferior *inf; |
c906108c | 332 | |
fd361982 | 333 | if (!startswith (bfd_section_name (asect), ".reg/")) |
c906108c SS |
334 | return; |
335 | ||
fd361982 | 336 | core_tid = atoi (bfd_section_name (asect) + 5); |
c906108c | 337 | |
261b8d08 PA |
338 | pid = bfd_core_file_pid (core_bfd); |
339 | if (pid == 0) | |
3cdd9356 | 340 | { |
9ab8741a | 341 | fake_pid_p = true; |
3cdd9356 | 342 | pid = CORELOW_PID; |
3cdd9356 | 343 | } |
0de3b513 | 344 | |
261b8d08 PA |
345 | lwpid = core_tid; |
346 | ||
88f38a04 PA |
347 | inf = current_inferior (); |
348 | if (inf->pid == 0) | |
349 | { | |
350 | inferior_appeared (inf, pid); | |
351 | inf->fake_pid_p = fake_pid_p; | |
352 | } | |
3cdd9356 | 353 | |
60db1b85 | 354 | ptid_t ptid (pid, lwpid); |
3cdd9356 | 355 | |
60db1b85 | 356 | thread_info *thr = add_thread (inf->process_target (), ptid); |
c906108c SS |
357 | |
358 | /* Warning, Will Robinson, looking at BFD private data! */ | |
359 | ||
360 | if (reg_sect != NULL | |
aff410f1 | 361 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
60db1b85 | 362 | switch_to_thread (thr); /* Yes, make it current. */ |
c906108c SS |
363 | } |
364 | ||
451953fa PA |
365 | /* Issue a message saying we have no core to debug, if FROM_TTY. */ |
366 | ||
367 | static void | |
368 | maybe_say_no_core_file_now (int from_tty) | |
369 | { | |
370 | if (from_tty) | |
371 | printf_filtered (_("No core file now.\n")); | |
372 | } | |
373 | ||
30baf67b | 374 | /* Backward compatibility with old way of specifying core files. */ |
451953fa PA |
375 | |
376 | void | |
377 | core_file_command (const char *filename, int from_tty) | |
378 | { | |
379 | dont_repeat (); /* Either way, seems bogus. */ | |
380 | ||
381 | if (filename == NULL) | |
382 | { | |
383 | if (core_bfd != NULL) | |
384 | { | |
385 | target_detach (current_inferior (), from_tty); | |
386 | gdb_assert (core_bfd == NULL); | |
387 | } | |
388 | else | |
389 | maybe_say_no_core_file_now (from_tty); | |
390 | } | |
391 | else | |
392 | core_target_open (filename, from_tty); | |
393 | } | |
394 | ||
aa2d5a42 KS |
395 | /* Locate (and load) an executable file (and symbols) given the core file |
396 | BFD ABFD. */ | |
397 | ||
398 | static void | |
399 | locate_exec_from_corefile_build_id (bfd *abfd, int from_tty) | |
400 | { | |
401 | const bfd_build_id *build_id = build_id_bfd_get (abfd); | |
402 | if (build_id == nullptr) | |
403 | return; | |
404 | ||
405 | gdb_bfd_ref_ptr execbfd | |
406 | = build_id_to_exec_bfd (build_id->size, build_id->data); | |
407 | ||
408 | if (execbfd != nullptr) | |
409 | { | |
410 | exec_file_attach (bfd_get_filename (execbfd.get ()), from_tty); | |
411 | symbol_file_add_main (bfd_get_filename (execbfd.get ()), | |
412 | symfile_add_flag (from_tty ? SYMFILE_VERBOSE : 0)); | |
413 | } | |
414 | } | |
415 | ||
d9f719f1 | 416 | /* See gdbcore.h. */ |
c906108c | 417 | |
f6ac5f3d | 418 | void |
d9f719f1 | 419 | core_target_open (const char *arg, int from_tty) |
c906108c SS |
420 | { |
421 | const char *p; | |
422 | int siggy; | |
c906108c | 423 | int scratch_chan; |
ee28ca0f | 424 | int flags; |
c906108c SS |
425 | |
426 | target_preopen (from_tty); | |
014f9477 | 427 | if (!arg) |
c906108c | 428 | { |
8a3fe4f8 | 429 | if (core_bfd) |
3e43a32a MS |
430 | error (_("No core file specified. (Use `detach' " |
431 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
432 | else |
433 | error (_("No core file specified.")); | |
c906108c SS |
434 | } |
435 | ||
ee0c3293 TT |
436 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); |
437 | if (!IS_ABSOLUTE_PATH (filename.get ())) | |
ff8577f6 | 438 | filename = gdb_abspath (filename.get ()); |
c906108c | 439 | |
ee28ca0f AC |
440 | flags = O_BINARY | O_LARGEFILE; |
441 | if (write_files) | |
442 | flags |= O_RDWR; | |
443 | else | |
444 | flags |= O_RDONLY; | |
ee0c3293 | 445 | scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); |
c906108c | 446 | if (scratch_chan < 0) |
ee0c3293 | 447 | perror_with_name (filename.get ()); |
c906108c | 448 | |
ee0c3293 | 449 | gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename.get (), gnutarget, |
192b62ce TT |
450 | write_files ? FOPEN_RUB : FOPEN_RB, |
451 | scratch_chan)); | |
c906108c | 452 | if (temp_bfd == NULL) |
ee0c3293 | 453 | perror_with_name (filename.get ()); |
c906108c | 454 | |
6ba0a321 | 455 | if (!bfd_check_format (temp_bfd.get (), bfd_core)) |
c906108c SS |
456 | { |
457 | /* Do it after the err msg */ | |
aff410f1 MS |
458 | /* FIXME: should be checking for errors from bfd_close (for one |
459 | thing, on error it does not free all the storage associated | |
460 | with the bfd). */ | |
8a3fe4f8 | 461 | error (_("\"%s\" is not a core dump: %s"), |
ee0c3293 | 462 | filename.get (), bfd_errmsg (bfd_get_error ())); |
c906108c SS |
463 | } |
464 | ||
06333fea | 465 | current_program_space->cbfd = std::move (temp_bfd); |
c906108c | 466 | |
15244507 | 467 | core_target *target = new core_target (); |
0e24ac5d | 468 | |
15244507 PA |
469 | /* Own the target until it is successfully pushed. */ |
470 | target_ops_up target_holder (target); | |
2acceee2 | 471 | |
c906108c SS |
472 | validate_files (); |
473 | ||
2f1b5984 MK |
474 | /* If we have no exec file, try to set the architecture from the |
475 | core file. We don't do this unconditionally since an exec file | |
476 | typically contains more information that helps us determine the | |
477 | architecture than a core file. */ | |
478 | if (!exec_bfd) | |
479 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 480 | |
dea57a62 | 481 | push_target (std::move (target_holder)); |
c906108c | 482 | |
60db1b85 | 483 | switch_to_no_thread (); |
0de3b513 | 484 | |
739fc47a PA |
485 | /* Need to flush the register cache (and the frame cache) from a |
486 | previous debug session. If inferior_ptid ends up the same as the | |
487 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
488 | core2; core core1; core core2 --- then there's potential for | |
489 | get_current_regcache to return the cached regcache of the | |
490 | previous session, and the frame cache being stale. */ | |
491 | registers_changed (); | |
492 | ||
0de3b513 PA |
493 | /* Build up thread list from BFD sections, and possibly set the |
494 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 495 | section. */ |
0de3b513 PA |
496 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
497 | bfd_get_section_by_name (core_bfd, ".reg")); | |
498 | ||
d7e15655 | 499 | if (inferior_ptid == null_ptid) |
3cdd9356 PA |
500 | { |
501 | /* Either we found no .reg/NN section, and hence we have a | |
502 | non-threaded core (single-threaded, from gdb's perspective), | |
503 | or for some reason add_to_thread_list couldn't determine | |
504 | which was the "main" thread. The latter case shouldn't | |
505 | usually happen, but we're dealing with input here, which can | |
506 | always be broken in different ways. */ | |
00431a78 | 507 | thread_info *thread = first_thread_of_inferior (current_inferior ()); |
c5504eaf | 508 | |
3cdd9356 PA |
509 | if (thread == NULL) |
510 | { | |
c45ceae0 | 511 | inferior_appeared (current_inferior (), CORELOW_PID); |
60db1b85 | 512 | thread = add_thread_silent (target, ptid_t (CORELOW_PID)); |
3cdd9356 | 513 | } |
60db1b85 PA |
514 | |
515 | switch_to_thread (thread); | |
3cdd9356 PA |
516 | } |
517 | ||
aa2d5a42 KS |
518 | if (exec_bfd == nullptr) |
519 | locate_exec_from_corefile_build_id (core_bfd, from_tty); | |
520 | ||
15244507 | 521 | post_create_inferior (target, from_tty); |
959b8724 | 522 | |
0de3b513 PA |
523 | /* Now go through the target stack looking for threads since there |
524 | may be a thread_stratum target loaded on top of target core by | |
525 | now. The layer above should claim threads found in the BFD | |
526 | sections. */ | |
a70b8144 | 527 | try |
8e7b59a5 | 528 | { |
e8032dde | 529 | target_update_thread_list (); |
8e7b59a5 KS |
530 | } |
531 | ||
230d2906 | 532 | catch (const gdb_exception_error &except) |
492d29ea PA |
533 | { |
534 | exception_print (gdb_stderr, except); | |
535 | } | |
0de3b513 | 536 | |
c906108c SS |
537 | p = bfd_core_file_failing_command (core_bfd); |
538 | if (p) | |
a3f17187 | 539 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c | 540 | |
0c557179 SDJ |
541 | /* Clearing any previous state of convenience variables. */ |
542 | clear_exit_convenience_vars (); | |
543 | ||
c906108c SS |
544 | siggy = bfd_core_file_failing_signal (core_bfd); |
545 | if (siggy > 0) | |
423ec54c | 546 | { |
15244507 PA |
547 | gdbarch *core_gdbarch = target->core_gdbarch (); |
548 | ||
22203bbf | 549 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
550 | core (map gdb_signal from host signals). If we do have |
551 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
552 | implementation for that gdbarch, as a fallback measure, | |
553 | assume the host signal mapping. It'll be correct for native | |
554 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 555 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
556 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
557 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
558 | siggy) | |
559 | : gdb_signal_from_host (siggy)); | |
423ec54c | 560 | |
ad97bfc5 | 561 | printf_filtered (_("Program terminated with signal %s, %s"), |
2d503272 | 562 | gdb_signal_to_name (sig), gdb_signal_to_string (sig)); |
ad97bfc5 JB |
563 | if (gdbarch_report_signal_info_p (core_gdbarch)) |
564 | gdbarch_report_signal_info (core_gdbarch, current_uiout, sig); | |
565 | printf_filtered (_(".\n")); | |
0c557179 SDJ |
566 | |
567 | /* Set the value of the internal variable $_exitsignal, | |
568 | which holds the signal uncaught by the inferior. */ | |
569 | set_internalvar_integer (lookup_internalvar ("_exitsignal"), | |
570 | siggy); | |
423ec54c | 571 | } |
c906108c | 572 | |
87ab71f0 PA |
573 | /* Fetch all registers from core file. */ |
574 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 575 | |
87ab71f0 PA |
576 | /* Now, set up the frame cache, and print the top of stack. */ |
577 | reinit_frame_cache (); | |
08d72866 | 578 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
f0e8c4c5 JK |
579 | |
580 | /* Current thread should be NUM 1 but the user does not know that. | |
581 | If a program is single threaded gdb in general does not mention | |
582 | anything about threads. That is why the test is >= 2. */ | |
5b6d1e4f | 583 | if (thread_count (target) >= 2) |
f0e8c4c5 | 584 | { |
a70b8144 | 585 | try |
f0e8c4c5 JK |
586 | { |
587 | thread_command (NULL, from_tty); | |
588 | } | |
230d2906 | 589 | catch (const gdb_exception_error &except) |
492d29ea PA |
590 | { |
591 | exception_print (gdb_stderr, except); | |
592 | } | |
f0e8c4c5 | 593 | } |
c906108c SS |
594 | } |
595 | ||
f6ac5f3d PA |
596 | void |
597 | core_target::detach (inferior *inf, int from_tty) | |
c906108c | 598 | { |
15244507 PA |
599 | /* Note that 'this' is dangling after this call. unpush_target |
600 | closes the target, and our close implementation deletes | |
601 | 'this'. */ | |
f6ac5f3d | 602 | unpush_target (this); |
15244507 | 603 | |
66452beb PW |
604 | /* Clear the register cache and the frame cache. */ |
605 | registers_changed (); | |
c906108c | 606 | reinit_frame_cache (); |
451953fa | 607 | maybe_say_no_core_file_now (from_tty); |
c906108c SS |
608 | } |
609 | ||
de57eccd | 610 | /* Try to retrieve registers from a section in core_bfd, and supply |
6ba0a321 | 611 | them to REGSET. |
de57eccd | 612 | |
11a33714 SM |
613 | If ptid's lwp member is zero, do the single-threaded |
614 | thing: look for a section named NAME. If ptid's lwp | |
0de3b513 PA |
615 | member is non-zero, do the multi-threaded thing: look for a section |
616 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
11a33714 | 617 | representation of ptid's lwp member. |
de57eccd JM |
618 | |
619 | HUMAN_NAME is a human-readable name for the kind of registers the | |
620 | NAME section contains, for use in error messages. | |
621 | ||
15244507 PA |
622 | If REQUIRED is true, print an error if the core file doesn't have a |
623 | section by the appropriate name. Otherwise, just do nothing. */ | |
de57eccd | 624 | |
15244507 PA |
625 | void |
626 | core_target::get_core_register_section (struct regcache *regcache, | |
627 | const struct regset *regset, | |
628 | const char *name, | |
dbd534fe | 629 | int section_min_size, |
15244507 PA |
630 | const char *human_name, |
631 | bool required) | |
de57eccd | 632 | { |
6ba0a321 CB |
633 | gdb_assert (regset != nullptr); |
634 | ||
7be0c536 | 635 | struct bfd_section *section; |
de57eccd | 636 | bfd_size_type size; |
6ba0a321 | 637 | bool variable_size_section = (regset->flags & REGSET_VARIABLE_SIZE); |
de57eccd | 638 | |
3c3ae77e | 639 | thread_section_name section_name (name, regcache->ptid ()); |
de57eccd | 640 | |
3c3ae77e | 641 | section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); |
de57eccd JM |
642 | if (! section) |
643 | { | |
644 | if (required) | |
aff410f1 MS |
645 | warning (_("Couldn't find %s registers in core file."), |
646 | human_name); | |
de57eccd JM |
647 | return; |
648 | } | |
649 | ||
fd361982 | 650 | size = bfd_section_size (section); |
dbd534fe | 651 | if (size < section_min_size) |
8f0435f7 | 652 | { |
3c3ae77e PA |
653 | warning (_("Section `%s' in core file too small."), |
654 | section_name.c_str ()); | |
8f0435f7 AA |
655 | return; |
656 | } | |
dbd534fe | 657 | if (size != section_min_size && !variable_size_section) |
f962539a AA |
658 | { |
659 | warning (_("Unexpected size of section `%s' in core file."), | |
3c3ae77e | 660 | section_name.c_str ()); |
f962539a | 661 | } |
8f0435f7 | 662 | |
0cac9354 | 663 | gdb::byte_vector contents (size); |
d8b2f9e3 SM |
664 | if (!bfd_get_section_contents (core_bfd, section, contents.data (), |
665 | (file_ptr) 0, size)) | |
de57eccd | 666 | { |
8a3fe4f8 | 667 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
3c3ae77e | 668 | human_name, section_name.c_str ()); |
de57eccd JM |
669 | return; |
670 | } | |
671 | ||
6ba0a321 | 672 | regset->supply_regset (regset, regcache, -1, contents.data (), size); |
de57eccd JM |
673 | } |
674 | ||
15244507 PA |
675 | /* Data passed to gdbarch_iterate_over_regset_sections's callback. */ |
676 | struct get_core_registers_cb_data | |
677 | { | |
678 | core_target *target; | |
679 | struct regcache *regcache; | |
680 | }; | |
681 | ||
5aa82d05 AA |
682 | /* Callback for get_core_registers that handles a single core file |
683 | register note section. */ | |
684 | ||
685 | static void | |
a616bb94 | 686 | get_core_registers_cb (const char *sect_name, int supply_size, int collect_size, |
8f0435f7 | 687 | const struct regset *regset, |
5aa82d05 AA |
688 | const char *human_name, void *cb_data) |
689 | { | |
6ba0a321 CB |
690 | gdb_assert (regset != nullptr); |
691 | ||
15244507 PA |
692 | auto *data = (get_core_registers_cb_data *) cb_data; |
693 | bool required = false; | |
6ba0a321 | 694 | bool variable_size_section = (regset->flags & REGSET_VARIABLE_SIZE); |
a616bb94 AH |
695 | |
696 | if (!variable_size_section) | |
697 | gdb_assert (supply_size == collect_size); | |
5aa82d05 AA |
698 | |
699 | if (strcmp (sect_name, ".reg") == 0) | |
8f0435f7 | 700 | { |
15244507 | 701 | required = true; |
8f0435f7 AA |
702 | if (human_name == NULL) |
703 | human_name = "general-purpose"; | |
704 | } | |
5aa82d05 | 705 | else if (strcmp (sect_name, ".reg2") == 0) |
8f0435f7 AA |
706 | { |
707 | if (human_name == NULL) | |
708 | human_name = "floating-point"; | |
709 | } | |
710 | ||
15244507 | 711 | data->target->get_core_register_section (data->regcache, regset, sect_name, |
6ba0a321 | 712 | supply_size, human_name, required); |
5aa82d05 | 713 | } |
de57eccd | 714 | |
c906108c SS |
715 | /* Get the registers out of a core file. This is the machine- |
716 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
717 | part, typically implemented in the xm-file for each |
718 | architecture. */ | |
c906108c SS |
719 | |
720 | /* We just get all the registers, so we don't use regno. */ | |
721 | ||
f6ac5f3d PA |
722 | void |
723 | core_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 724 | { |
15244507 | 725 | if (!(m_core_gdbarch != nullptr |
6ba0a321 | 726 | && gdbarch_iterate_over_regset_sections_p (m_core_gdbarch))) |
c906108c SS |
727 | { |
728 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 729 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
730 | return; |
731 | } | |
732 | ||
6ba0a321 CB |
733 | struct gdbarch *gdbarch = regcache->arch (); |
734 | get_core_registers_cb_data data = { this, regcache }; | |
735 | gdbarch_iterate_over_regset_sections (gdbarch, | |
736 | get_core_registers_cb, | |
737 | (void *) &data, NULL); | |
c906108c | 738 | |
ee99023e | 739 | /* Mark all registers not found in the core as unavailable. */ |
6ba0a321 | 740 | for (int i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
0ec9f114 | 741 | if (regcache->get_register_status (i) == REG_UNKNOWN) |
73e1c03f | 742 | regcache->raw_supply (i, NULL); |
c906108c SS |
743 | } |
744 | ||
f6ac5f3d PA |
745 | void |
746 | core_target::files_info () | |
c906108c | 747 | { |
15244507 | 748 | print_section_info (&m_core_section_table, core_bfd); |
c906108c | 749 | } |
e2544d02 | 750 | \f |
973695d6 KB |
751 | /* Helper method for core_target::xfer_partial. */ |
752 | ||
753 | enum target_xfer_status | |
754 | core_target::xfer_memory_via_mappings (gdb_byte *readbuf, | |
755 | const gdb_byte *writebuf, | |
756 | ULONGEST offset, ULONGEST len, | |
757 | ULONGEST *xfered_len) | |
758 | { | |
759 | enum target_xfer_status xfer_status; | |
760 | ||
761 | xfer_status = (section_table_xfer_memory_partial | |
762 | (readbuf, writebuf, | |
763 | offset, len, xfered_len, | |
764 | m_core_file_mappings.sections, | |
765 | m_core_file_mappings.sections_end)); | |
766 | ||
767 | if (xfer_status == TARGET_XFER_OK || m_core_unavailable_mappings.empty ()) | |
768 | return xfer_status; | |
769 | ||
770 | /* There are instances - e.g. when debugging within a docker | |
771 | container using the AUFS storage driver - where the pathnames | |
772 | obtained from the note section are incorrect. Despite the path | |
773 | being wrong, just knowing the start and end addresses of the | |
774 | mappings is still useful; we can attempt an access of the file | |
775 | stratum constrained to the address ranges corresponding to the | |
776 | unavailable mappings. */ | |
777 | ||
778 | ULONGEST memaddr = offset; | |
779 | ULONGEST memend = offset + len; | |
780 | ||
781 | for (const auto &mr : m_core_unavailable_mappings) | |
782 | { | |
783 | if (address_in_mem_range (memaddr, &mr)) | |
784 | { | |
785 | if (!address_in_mem_range (memend, &mr)) | |
786 | len = mr.start + mr.length - memaddr; | |
787 | ||
788 | xfer_status = this->beneath ()->xfer_partial (TARGET_OBJECT_MEMORY, | |
789 | NULL, | |
790 | readbuf, | |
791 | writebuf, | |
792 | offset, | |
793 | len, | |
794 | xfered_len); | |
795 | break; | |
796 | } | |
797 | } | |
798 | ||
799 | return xfer_status; | |
800 | } | |
801 | ||
f6ac5f3d PA |
802 | enum target_xfer_status |
803 | core_target::xfer_partial (enum target_object object, const char *annex, | |
804 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
805 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
e2544d02 RM |
806 | { |
807 | switch (object) | |
808 | { | |
809 | case TARGET_OBJECT_MEMORY: | |
2735d421 KB |
810 | { |
811 | enum target_xfer_status xfer_status; | |
812 | ||
813 | /* Try accessing memory contents from core file data, | |
814 | restricting consideration to those sections for which | |
815 | the BFD section flag SEC_HAS_CONTENTS is set. */ | |
816 | auto has_contents_cb = [] (const struct target_section *s) | |
817 | { | |
818 | return ((s->the_bfd_section->flags & SEC_HAS_CONTENTS) != 0); | |
819 | }; | |
820 | xfer_status = section_table_xfer_memory_partial | |
821 | (readbuf, writebuf, | |
822 | offset, len, xfered_len, | |
823 | m_core_section_table.sections, | |
824 | m_core_section_table.sections_end, | |
825 | has_contents_cb); | |
826 | if (xfer_status == TARGET_XFER_OK) | |
827 | return TARGET_XFER_OK; | |
828 | ||
db082f59 KB |
829 | /* Check file backed mappings. If they're available, use |
830 | core file provided mappings (e.g. from .note.linuxcore.file | |
831 | or the like) as this should provide a more accurate | |
832 | result. If not, check the stratum beneath us, which should | |
833 | be the file stratum. */ | |
834 | if (m_core_file_mappings.sections != nullptr) | |
973695d6 KB |
835 | xfer_status = xfer_memory_via_mappings (readbuf, writebuf, offset, |
836 | len, xfered_len); | |
db082f59 KB |
837 | else |
838 | xfer_status = this->beneath ()->xfer_partial (object, annex, readbuf, | |
839 | writebuf, offset, len, | |
840 | xfered_len); | |
2735d421 KB |
841 | if (xfer_status == TARGET_XFER_OK) |
842 | return TARGET_XFER_OK; | |
e2544d02 | 843 | |
2735d421 KB |
844 | /* Finally, attempt to access data in core file sections with |
845 | no contents. These will typically read as all zero. */ | |
846 | auto no_contents_cb = [&] (const struct target_section *s) | |
847 | { | |
848 | return !has_contents_cb (s); | |
849 | }; | |
850 | xfer_status = section_table_xfer_memory_partial | |
851 | (readbuf, writebuf, | |
852 | offset, len, xfered_len, | |
853 | m_core_section_table.sections, | |
854 | m_core_section_table.sections_end, | |
855 | no_contents_cb); | |
856 | ||
857 | return xfer_status; | |
858 | } | |
e2544d02 RM |
859 | case TARGET_OBJECT_AUXV: |
860 | if (readbuf) | |
861 | { | |
862 | /* When the aux vector is stored in core file, BFD | |
863 | represents this with a fake section called ".auxv". */ | |
864 | ||
c4c5b7ba | 865 | struct bfd_section *section; |
e2544d02 | 866 | bfd_size_type size; |
e2544d02 RM |
867 | |
868 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
869 | if (section == NULL) | |
2ed4b548 | 870 | return TARGET_XFER_E_IO; |
e2544d02 | 871 | |
fd361982 | 872 | size = bfd_section_size (section); |
e2544d02 | 873 | if (offset >= size) |
9b409511 | 874 | return TARGET_XFER_EOF; |
e2544d02 RM |
875 | size -= offset; |
876 | if (size > len) | |
877 | size = len; | |
9b409511 YQ |
878 | |
879 | if (size == 0) | |
880 | return TARGET_XFER_EOF; | |
881 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
882 | (file_ptr) offset, size)) | |
e2544d02 | 883 | { |
8a3fe4f8 | 884 | warning (_("Couldn't read NT_AUXV note in core file.")); |
2ed4b548 | 885 | return TARGET_XFER_E_IO; |
e2544d02 RM |
886 | } |
887 | ||
9b409511 YQ |
888 | *xfered_len = (ULONGEST) size; |
889 | return TARGET_XFER_OK; | |
e2544d02 | 890 | } |
2ed4b548 | 891 | return TARGET_XFER_E_IO; |
e2544d02 | 892 | |
403e1656 MK |
893 | case TARGET_OBJECT_WCOOKIE: |
894 | if (readbuf) | |
895 | { | |
896 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
897 | represents this with a fake section called |
898 | ".wcookie". */ | |
403e1656 MK |
899 | |
900 | struct bfd_section *section; | |
901 | bfd_size_type size; | |
403e1656 MK |
902 | |
903 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
904 | if (section == NULL) | |
2ed4b548 | 905 | return TARGET_XFER_E_IO; |
403e1656 | 906 | |
fd361982 | 907 | size = bfd_section_size (section); |
403e1656 | 908 | if (offset >= size) |
96c4f946 | 909 | return TARGET_XFER_EOF; |
403e1656 MK |
910 | size -= offset; |
911 | if (size > len) | |
912 | size = len; | |
9b409511 YQ |
913 | |
914 | if (size == 0) | |
915 | return TARGET_XFER_EOF; | |
916 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
917 | (file_ptr) offset, size)) | |
403e1656 | 918 | { |
8a3fe4f8 | 919 | warning (_("Couldn't read StackGhost cookie in core file.")); |
2ed4b548 | 920 | return TARGET_XFER_E_IO; |
403e1656 MK |
921 | } |
922 | ||
9b409511 YQ |
923 | *xfered_len = (ULONGEST) size; |
924 | return TARGET_XFER_OK; | |
925 | ||
403e1656 | 926 | } |
2ed4b548 | 927 | return TARGET_XFER_E_IO; |
403e1656 | 928 | |
de584861 | 929 | case TARGET_OBJECT_LIBRARIES: |
15244507 PA |
930 | if (m_core_gdbarch != nullptr |
931 | && gdbarch_core_xfer_shared_libraries_p (m_core_gdbarch)) | |
de584861 PA |
932 | { |
933 | if (writebuf) | |
2ed4b548 | 934 | return TARGET_XFER_E_IO; |
9b409511 YQ |
935 | else |
936 | { | |
15244507 | 937 | *xfered_len = gdbarch_core_xfer_shared_libraries (m_core_gdbarch, |
9b409511 YQ |
938 | readbuf, |
939 | offset, len); | |
940 | ||
941 | if (*xfered_len == 0) | |
942 | return TARGET_XFER_EOF; | |
943 | else | |
944 | return TARGET_XFER_OK; | |
945 | } | |
de584861 PA |
946 | } |
947 | /* FALL THROUGH */ | |
948 | ||
356a5233 | 949 | case TARGET_OBJECT_LIBRARIES_AIX: |
15244507 PA |
950 | if (m_core_gdbarch != nullptr |
951 | && gdbarch_core_xfer_shared_libraries_aix_p (m_core_gdbarch)) | |
356a5233 JB |
952 | { |
953 | if (writebuf) | |
2ed4b548 | 954 | return TARGET_XFER_E_IO; |
9b409511 YQ |
955 | else |
956 | { | |
957 | *xfered_len | |
15244507 | 958 | = gdbarch_core_xfer_shared_libraries_aix (m_core_gdbarch, |
9b409511 YQ |
959 | readbuf, offset, |
960 | len); | |
961 | ||
962 | if (*xfered_len == 0) | |
963 | return TARGET_XFER_EOF; | |
964 | else | |
965 | return TARGET_XFER_OK; | |
966 | } | |
356a5233 JB |
967 | } |
968 | /* FALL THROUGH */ | |
969 | ||
9015683b TT |
970 | case TARGET_OBJECT_SIGNAL_INFO: |
971 | if (readbuf) | |
9b409511 | 972 | { |
15244507 PA |
973 | if (m_core_gdbarch != nullptr |
974 | && gdbarch_core_xfer_siginfo_p (m_core_gdbarch)) | |
9b409511 | 975 | { |
15244507 | 976 | LONGEST l = gdbarch_core_xfer_siginfo (m_core_gdbarch, readbuf, |
382b69bb JB |
977 | offset, len); |
978 | ||
979 | if (l >= 0) | |
980 | { | |
981 | *xfered_len = l; | |
982 | if (l == 0) | |
983 | return TARGET_XFER_EOF; | |
984 | else | |
985 | return TARGET_XFER_OK; | |
986 | } | |
9b409511 YQ |
987 | } |
988 | } | |
2ed4b548 | 989 | return TARGET_XFER_E_IO; |
9015683b | 990 | |
e2544d02 | 991 | default: |
b6a8c27b PA |
992 | return this->beneath ()->xfer_partial (object, annex, readbuf, |
993 | writebuf, offset, len, | |
994 | xfered_len); | |
e2544d02 RM |
995 | } |
996 | } | |
997 | ||
c906108c | 998 | \f |
c906108c SS |
999 | |
1000 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
1001 | exactly lively, are they? On the other hand, if we don't claim | |
1002 | that each & every one is alive, then we don't get any of them | |
1003 | to appear in an "info thread" command, which is quite a useful | |
1004 | behaviour. | |
c5aa993b | 1005 | */ |
57810aa7 | 1006 | bool |
f6ac5f3d | 1007 | core_target::thread_alive (ptid_t ptid) |
c906108c | 1008 | { |
57810aa7 | 1009 | return true; |
c906108c SS |
1010 | } |
1011 | ||
4eb0ad19 DJ |
1012 | /* Ask the current architecture what it knows about this core file. |
1013 | That will be used, in turn, to pick a better architecture. This | |
1014 | wrapper could be avoided if targets got a chance to specialize | |
15244507 | 1015 | core_target. */ |
4eb0ad19 | 1016 | |
f6ac5f3d PA |
1017 | const struct target_desc * |
1018 | core_target::read_description () | |
4eb0ad19 | 1019 | { |
15244507 | 1020 | if (m_core_gdbarch && gdbarch_core_read_description_p (m_core_gdbarch)) |
2117c711 TT |
1021 | { |
1022 | const struct target_desc *result; | |
1023 | ||
15244507 | 1024 | result = gdbarch_core_read_description (m_core_gdbarch, this, core_bfd); |
2117c711 TT |
1025 | if (result != NULL) |
1026 | return result; | |
1027 | } | |
4eb0ad19 | 1028 | |
b6a8c27b | 1029 | return this->beneath ()->read_description (); |
4eb0ad19 DJ |
1030 | } |
1031 | ||
a068643d | 1032 | std::string |
f6ac5f3d | 1033 | core_target::pid_to_str (ptid_t ptid) |
0de3b513 | 1034 | { |
88f38a04 | 1035 | struct inferior *inf; |
a5ee0f0c | 1036 | int pid; |
0de3b513 | 1037 | |
a5ee0f0c PA |
1038 | /* The preferred way is to have a gdbarch/OS specific |
1039 | implementation. */ | |
15244507 PA |
1040 | if (m_core_gdbarch != nullptr |
1041 | && gdbarch_core_pid_to_str_p (m_core_gdbarch)) | |
1042 | return gdbarch_core_pid_to_str (m_core_gdbarch, ptid); | |
c5504eaf | 1043 | |
a5ee0f0c PA |
1044 | /* Otherwise, if we don't have one, we'll just fallback to |
1045 | "process", with normal_pid_to_str. */ | |
28439f5e | 1046 | |
a5ee0f0c | 1047 | /* Try the LWPID field first. */ |
e38504b3 | 1048 | pid = ptid.lwp (); |
a5ee0f0c | 1049 | if (pid != 0) |
f2907e49 | 1050 | return normal_pid_to_str (ptid_t (pid)); |
a5ee0f0c PA |
1051 | |
1052 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
1053 | only if it isn't a fake PID. */ | |
5b6d1e4f | 1054 | inf = find_inferior_ptid (this, ptid); |
88f38a04 | 1055 | if (inf != NULL && !inf->fake_pid_p) |
a5ee0f0c | 1056 | return normal_pid_to_str (ptid); |
0de3b513 | 1057 | |
a5ee0f0c | 1058 | /* No luck. We simply don't have a valid PID to print. */ |
a068643d | 1059 | return "<main task>"; |
0de3b513 PA |
1060 | } |
1061 | ||
f6ac5f3d PA |
1062 | const char * |
1063 | core_target::thread_name (struct thread_info *thr) | |
4dfc5dbc | 1064 | { |
15244507 PA |
1065 | if (m_core_gdbarch != nullptr |
1066 | && gdbarch_core_thread_name_p (m_core_gdbarch)) | |
1067 | return gdbarch_core_thread_name (m_core_gdbarch, thr); | |
4dfc5dbc JB |
1068 | return NULL; |
1069 | } | |
1070 | ||
57810aa7 | 1071 | bool |
f6ac5f3d | 1072 | core_target::has_memory () |
c35b1492 PA |
1073 | { |
1074 | return (core_bfd != NULL); | |
1075 | } | |
1076 | ||
57810aa7 | 1077 | bool |
f6ac5f3d | 1078 | core_target::has_stack () |
c35b1492 PA |
1079 | { |
1080 | return (core_bfd != NULL); | |
1081 | } | |
1082 | ||
57810aa7 | 1083 | bool |
f6ac5f3d | 1084 | core_target::has_registers () |
c35b1492 PA |
1085 | { |
1086 | return (core_bfd != NULL); | |
1087 | } | |
1088 | ||
451b7c33 TT |
1089 | /* Implement the to_info_proc method. */ |
1090 | ||
f6ac5f3d PA |
1091 | bool |
1092 | core_target::info_proc (const char *args, enum info_proc_what request) | |
451b7c33 TT |
1093 | { |
1094 | struct gdbarch *gdbarch = get_current_arch (); | |
1095 | ||
1096 | /* Since this is the core file target, call the 'core_info_proc' | |
1097 | method on gdbarch, not 'info_proc'. */ | |
1098 | if (gdbarch_core_info_proc_p (gdbarch)) | |
1099 | gdbarch_core_info_proc (gdbarch, args, request); | |
c906108c | 1100 | |
f6ac5f3d | 1101 | return true; |
c906108c SS |
1102 | } |
1103 | ||
09c2f5d4 KB |
1104 | /* Get a pointer to the current core target. If not connected to a |
1105 | core target, return NULL. */ | |
1106 | ||
1107 | static core_target * | |
1108 | get_current_core_target () | |
1109 | { | |
1110 | target_ops *proc_target = current_inferior ()->process_target (); | |
1111 | return dynamic_cast<core_target *> (proc_target); | |
1112 | } | |
1113 | ||
1114 | /* Display file backed mappings from core file. */ | |
1115 | ||
1116 | void | |
1117 | core_target::info_proc_mappings (struct gdbarch *gdbarch) | |
1118 | { | |
1119 | if (m_core_file_mappings.sections != m_core_file_mappings.sections_end) | |
1120 | { | |
1121 | printf_filtered (_("Mapped address spaces:\n\n")); | |
1122 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1123 | { | |
1124 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1125 | "Start Addr", | |
1126 | " End Addr", | |
1127 | " Size", " Offset", "objfile"); | |
1128 | } | |
1129 | else | |
1130 | { | |
1131 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1132 | "Start Addr", | |
1133 | " End Addr", | |
1134 | " Size", " Offset", "objfile"); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | for (const struct target_section *tsp = m_core_file_mappings.sections; | |
1139 | tsp < m_core_file_mappings.sections_end; | |
1140 | tsp++) | |
1141 | { | |
1142 | ULONGEST start = tsp->addr; | |
1143 | ULONGEST end = tsp->endaddr; | |
1144 | ULONGEST file_ofs = tsp->the_bfd_section->filepos; | |
1145 | const char *filename = bfd_get_filename (tsp->the_bfd_section->owner); | |
1146 | ||
1147 | if (gdbarch_addr_bit (gdbarch) == 32) | |
1148 | printf_filtered ("\t%10s %10s %10s %10s %s\n", | |
1149 | paddress (gdbarch, start), | |
1150 | paddress (gdbarch, end), | |
1151 | hex_string (end - start), | |
1152 | hex_string (file_ofs), | |
1153 | filename); | |
1154 | else | |
1155 | printf_filtered (" %18s %18s %10s %10s %s\n", | |
1156 | paddress (gdbarch, start), | |
1157 | paddress (gdbarch, end), | |
1158 | hex_string (end - start), | |
1159 | hex_string (file_ofs), | |
1160 | filename); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* Implement "maintenance print core-file-backed-mappings" command. | |
1165 | ||
1166 | If mappings are loaded, the results should be similar to the | |
1167 | mappings shown by "info proc mappings". This command is mainly a | |
1168 | debugging tool for GDB developers to make sure that the expected | |
1169 | mappings are present after loading a core file. For Linux, the | |
1170 | output provided by this command will be very similar (if not | |
1171 | identical) to that provided by "info proc mappings". This is not | |
1172 | necessarily the case for other OSes which might provide | |
1173 | more/different information in the "info proc mappings" output. */ | |
1174 | ||
1175 | static void | |
1176 | maintenance_print_core_file_backed_mappings (const char *args, int from_tty) | |
1177 | { | |
1178 | core_target *targ = get_current_core_target (); | |
1179 | if (targ != nullptr) | |
1180 | targ->info_proc_mappings (targ->core_gdbarch ()); | |
1181 | } | |
1182 | ||
6c265988 | 1183 | void _initialize_corelow (); |
c906108c | 1184 | void |
6c265988 | 1185 | _initialize_corelow () |
c906108c | 1186 | { |
d9f719f1 | 1187 | add_target (core_target_info, core_target_open, filename_completer); |
09c2f5d4 KB |
1188 | add_cmd ("core-file-backed-mappings", class_maintenance, |
1189 | maintenance_print_core_file_backed_mappings, | |
513487e1 | 1190 | _("Print core file's file-backed mappings."), |
09c2f5d4 | 1191 | &maintenanceprintlist); |
c906108c | 1192 | } |