Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
e2882c85 | 3 | Copyright (C) 1986-2018 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" | |
0e24ac5d | 21 | #include "arch-utils.h" |
c906108c SS |
22 | #include <signal.h> |
23 | #include <fcntl.h> | |
fc24370e MS |
24 | #ifdef HAVE_SYS_FILE_H |
25 | #include <sys/file.h> /* needed for F_OK and friends */ | |
26 | #endif | |
c5aa993b | 27 | #include "frame.h" /* required by inferior.h */ |
c906108c | 28 | #include "inferior.h" |
45741a9c | 29 | #include "infrun.h" |
c906108c SS |
30 | #include "symtab.h" |
31 | #include "command.h" | |
32 | #include "bfd.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
35 | #include "gdbthread.h" | |
4e052eda | 36 | #include "regcache.h" |
0e24ac5d | 37 | #include "regset.h" |
990f9fe3 | 38 | #include "symfile.h" |
4646aa9d | 39 | #include "exec.h" |
dbda9972 | 40 | #include "readline/readline.h" |
a77053c2 | 41 | #include "solib.h" |
f90c07ac | 42 | #include "filenames.h" |
6c95b8df | 43 | #include "progspace.h" |
516ba659 | 44 | #include "objfiles.h" |
cbb099e8 | 45 | #include "gdb_bfd.h" |
9852c492 | 46 | #include "completer.h" |
614c279d | 47 | #include "filestuff.h" |
8e860359 | 48 | |
ee28ca0f AC |
49 | #ifndef O_LARGEFILE |
50 | #define O_LARGEFILE 0 | |
51 | #endif | |
52 | ||
f6ac5f3d PA |
53 | /* The core file target. */ |
54 | ||
55 | class core_target final : public target_ops | |
56 | { | |
57 | public: | |
58 | core_target () | |
59 | { to_stratum = process_stratum; } | |
60 | ||
61 | const char *shortname () override | |
62 | { return "core"; } | |
63 | ||
64 | const char *longname () override | |
65 | { return _("Local core dump file"); } | |
66 | ||
67 | const char *doc () override | |
68 | { | |
69 | return _("\ | |
70 | Use a core file as a target. Specify the filename of the core file."); | |
71 | } | |
72 | ||
73 | void open (const char *, int) override; | |
74 | void close () override; | |
75 | void detach (inferior *, int) override; | |
76 | void fetch_registers (struct regcache *, int) override; | |
77 | ||
78 | enum target_xfer_status xfer_partial (enum target_object object, | |
79 | const char *annex, | |
80 | gdb_byte *readbuf, | |
81 | const gdb_byte *writebuf, | |
82 | ULONGEST offset, ULONGEST len, | |
83 | ULONGEST *xfered_len) override; | |
84 | void files_info () override; | |
85 | ||
57810aa7 | 86 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
87 | const struct target_desc *read_description () override; |
88 | ||
89 | const char *pid_to_str (ptid_t) override; | |
90 | ||
91 | const char *thread_name (struct thread_info *) override; | |
92 | ||
57810aa7 PA |
93 | bool has_memory () override; |
94 | bool has_stack () override; | |
95 | bool has_registers () override; | |
f6ac5f3d PA |
96 | bool info_proc (const char *, enum info_proc_what) override; |
97 | }; | |
98 | ||
99 | /* See gdbcore.h. */ | |
100 | struct target_ops *the_core_target; | |
101 | ||
00e32a35 AC |
102 | /* List of all available core_fns. On gdb startup, each core file |
103 | register reader calls deprecated_add_core_fns() to register | |
104 | information on each core format it is prepared to read. */ | |
c906108c SS |
105 | |
106 | static struct core_fns *core_file_fns = NULL; | |
107 | ||
aff410f1 MS |
108 | /* The core_fns for a core file handler that is prepared to read the |
109 | core file currently open on core_bfd. */ | |
2acceee2 JM |
110 | |
111 | static struct core_fns *core_vec = NULL; | |
112 | ||
0e24ac5d MK |
113 | /* FIXME: kettenis/20031023: Eventually this variable should |
114 | disappear. */ | |
115 | ||
6a3bfc5c | 116 | static struct gdbarch *core_gdbarch = NULL; |
0e24ac5d | 117 | |
07b82ea5 PA |
118 | /* Per-core data. Currently, only the section table. Note that these |
119 | target sections are *not* mapped in the current address spaces' set | |
120 | of target sections --- those should come only from pure executable | |
121 | or shared library bfds. The core bfd sections are an | |
122 | implementation detail of the core target, just like ptrace is for | |
123 | unix child targets. */ | |
124 | static struct target_section_table *core_data; | |
125 | ||
a14ed312 | 126 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 127 | |
020cc13c | 128 | static int gdb_check_format (bfd *); |
2acceee2 | 129 | |
74b7792f AC |
130 | static void core_close_cleanup (void *ignore); |
131 | ||
4efb68b1 | 132 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 133 | |
f6ac5f3d | 134 | static core_target core_ops; |
c906108c | 135 | |
7f9f62ba PA |
136 | /* An arbitrary identifier for the core inferior. */ |
137 | #define CORELOW_PID 1 | |
138 | ||
aff410f1 MS |
139 | /* Link a new core_fns into the global core_file_fns list. Called on |
140 | gdb startup by the _initialize routine in each core file register | |
b021a221 | 141 | reader, to register information about each format the reader is |
aff410f1 | 142 | prepared to handle. */ |
c906108c SS |
143 | |
144 | void | |
00e32a35 | 145 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 146 | { |
c5aa993b | 147 | cf->next = core_file_fns; |
c906108c SS |
148 | core_file_fns = cf; |
149 | } | |
150 | ||
2acceee2 JM |
151 | /* The default function that core file handlers can use to examine a |
152 | core file BFD and decide whether or not to accept the job of | |
aff410f1 | 153 | reading the core file. */ |
2acceee2 JM |
154 | |
155 | int | |
fba45db2 | 156 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
157 | { |
158 | int result; | |
159 | ||
160 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
161 | return (result); | |
162 | } | |
163 | ||
164 | /* Walk through the list of core functions to find a set that can | |
06b9f45f | 165 | handle the core file open on ABFD. Returns pointer to set that is |
aff410f1 | 166 | selected. */ |
2acceee2 JM |
167 | |
168 | static struct core_fns * | |
fba45db2 | 169 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
170 | { |
171 | struct core_fns *cf; | |
172 | struct core_fns *yummy = NULL; | |
45eba0ab | 173 | int matches = 0; |
2acceee2 | 174 | |
aff410f1 MS |
175 | /* Don't sniff if we have support for register sets in |
176 | CORE_GDBARCH. */ | |
29082443 | 177 | if (core_gdbarch && gdbarch_iterate_over_regset_sections_p (core_gdbarch)) |
0e24ac5d MK |
178 | return NULL; |
179 | ||
2acceee2 JM |
180 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
181 | { | |
182 | if (cf->core_sniffer (cf, abfd)) | |
183 | { | |
184 | yummy = cf; | |
185 | matches++; | |
186 | } | |
187 | } | |
188 | if (matches > 1) | |
189 | { | |
8a3fe4f8 | 190 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
191 | bfd_get_filename (abfd), matches); |
192 | } | |
193 | else if (matches == 0) | |
06b9f45f JK |
194 | error (_("\"%s\": no core file handler recognizes format"), |
195 | bfd_get_filename (abfd)); | |
196 | ||
2acceee2 JM |
197 | return (yummy); |
198 | } | |
199 | ||
200 | /* The default is to reject every core file format we see. Either | |
201 | BFD has to recognize it, or we have to provide a function in the | |
aff410f1 | 202 | core file handler that recognizes it. */ |
2acceee2 JM |
203 | |
204 | int | |
fba45db2 | 205 | default_check_format (bfd *abfd) |
2acceee2 JM |
206 | { |
207 | return (0); | |
208 | } | |
209 | ||
aff410f1 | 210 | /* Attempt to recognize core file formats that BFD rejects. */ |
2acceee2 | 211 | |
020cc13c | 212 | static int |
fba45db2 | 213 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
214 | { |
215 | struct core_fns *cf; | |
216 | ||
217 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
218 | { | |
219 | if (cf->check_format (abfd)) | |
220 | { | |
81a9a963 | 221 | return (1); |
2acceee2 JM |
222 | } |
223 | } | |
81a9a963 | 224 | return (0); |
2acceee2 | 225 | } |
c906108c | 226 | |
aff410f1 MS |
227 | /* Discard all vestiges of any previous core file and mark data and |
228 | stack spaces as empty. */ | |
c906108c | 229 | |
c906108c | 230 | static void |
f6ac5f3d | 231 | core_close () |
c906108c | 232 | { |
c906108c SS |
233 | if (core_bfd) |
234 | { | |
959b8724 | 235 | int pid = ptid_get_pid (inferior_ptid); |
aff410f1 MS |
236 | inferior_ptid = null_ptid; /* Avoid confusion from thread |
237 | stuff. */ | |
06b9f45f JK |
238 | if (pid != 0) |
239 | exit_inferior_silent (pid); | |
c906108c | 240 | |
aff410f1 MS |
241 | /* Clear out solib state while the bfd is still open. See |
242 | comments in clear_solib in solib.c. */ | |
a77053c2 | 243 | clear_solib (); |
7a292a7a | 244 | |
06b9f45f JK |
245 | if (core_data) |
246 | { | |
247 | xfree (core_data->sections); | |
248 | xfree (core_data); | |
249 | core_data = NULL; | |
250 | } | |
07b82ea5 | 251 | |
cbb099e8 | 252 | gdb_bfd_unref (core_bfd); |
c906108c | 253 | core_bfd = NULL; |
c906108c | 254 | } |
2acceee2 | 255 | core_vec = NULL; |
0e24ac5d | 256 | core_gdbarch = NULL; |
c906108c SS |
257 | } |
258 | ||
74b7792f AC |
259 | static void |
260 | core_close_cleanup (void *ignore) | |
261 | { | |
f6ac5f3d PA |
262 | core_close (); |
263 | } | |
264 | ||
265 | void | |
266 | core_target::close () | |
267 | { | |
268 | core_close (); | |
74b7792f AC |
269 | } |
270 | ||
aff410f1 MS |
271 | /* Look for sections whose names start with `.reg/' so that we can |
272 | extract the list of threads in a core file. */ | |
c906108c SS |
273 | |
274 | static void | |
4efb68b1 | 275 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 276 | { |
0de3b513 | 277 | ptid_t ptid; |
3cdd9356 PA |
278 | int core_tid; |
279 | int pid, lwpid; | |
c906108c | 280 | asection *reg_sect = (asection *) reg_sect_arg; |
88f38a04 PA |
281 | int fake_pid_p = 0; |
282 | struct inferior *inf; | |
c906108c | 283 | |
61012eef | 284 | if (!startswith (bfd_section_name (abfd, asect), ".reg/")) |
c906108c SS |
285 | return; |
286 | ||
3cdd9356 | 287 | core_tid = atoi (bfd_section_name (abfd, asect) + 5); |
c906108c | 288 | |
261b8d08 PA |
289 | pid = bfd_core_file_pid (core_bfd); |
290 | if (pid == 0) | |
3cdd9356 | 291 | { |
88f38a04 | 292 | fake_pid_p = 1; |
3cdd9356 | 293 | pid = CORELOW_PID; |
3cdd9356 | 294 | } |
0de3b513 | 295 | |
261b8d08 PA |
296 | lwpid = core_tid; |
297 | ||
88f38a04 PA |
298 | inf = current_inferior (); |
299 | if (inf->pid == 0) | |
300 | { | |
301 | inferior_appeared (inf, pid); | |
302 | inf->fake_pid_p = fake_pid_p; | |
303 | } | |
3cdd9356 PA |
304 | |
305 | ptid = ptid_build (pid, lwpid, 0); | |
306 | ||
307 | add_thread (ptid); | |
c906108c SS |
308 | |
309 | /* Warning, Will Robinson, looking at BFD private data! */ | |
310 | ||
311 | if (reg_sect != NULL | |
aff410f1 MS |
312 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
313 | inferior_ptid = ptid; /* Yes, make it current. */ | |
c906108c SS |
314 | } |
315 | ||
316 | /* This routine opens and sets up the core file bfd. */ | |
317 | ||
f6ac5f3d PA |
318 | void |
319 | core_target::open (const char *arg, int from_tty) | |
c906108c SS |
320 | { |
321 | const char *p; | |
322 | int siggy; | |
323 | struct cleanup *old_chain; | |
c906108c | 324 | int scratch_chan; |
ee28ca0f | 325 | int flags; |
c906108c SS |
326 | |
327 | target_preopen (from_tty); | |
014f9477 | 328 | if (!arg) |
c906108c | 329 | { |
8a3fe4f8 | 330 | if (core_bfd) |
3e43a32a MS |
331 | error (_("No core file specified. (Use `detach' " |
332 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
333 | else |
334 | error (_("No core file specified.")); | |
c906108c SS |
335 | } |
336 | ||
ee0c3293 TT |
337 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); |
338 | if (!IS_ABSOLUTE_PATH (filename.get ())) | |
339 | filename.reset (concat (current_directory, "/", | |
340 | filename.get (), (char *) NULL)); | |
c906108c | 341 | |
ee28ca0f AC |
342 | flags = O_BINARY | O_LARGEFILE; |
343 | if (write_files) | |
344 | flags |= O_RDWR; | |
345 | else | |
346 | flags |= O_RDONLY; | |
ee0c3293 | 347 | scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); |
c906108c | 348 | if (scratch_chan < 0) |
ee0c3293 | 349 | perror_with_name (filename.get ()); |
c906108c | 350 | |
ee0c3293 | 351 | gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename.get (), gnutarget, |
192b62ce TT |
352 | write_files ? FOPEN_RUB : FOPEN_RB, |
353 | scratch_chan)); | |
c906108c | 354 | if (temp_bfd == NULL) |
ee0c3293 | 355 | perror_with_name (filename.get ()); |
c906108c | 356 | |
192b62ce TT |
357 | if (!bfd_check_format (temp_bfd.get (), bfd_core) |
358 | && !gdb_check_format (temp_bfd.get ())) | |
c906108c SS |
359 | { |
360 | /* Do it after the err msg */ | |
aff410f1 MS |
361 | /* FIXME: should be checking for errors from bfd_close (for one |
362 | thing, on error it does not free all the storage associated | |
363 | with the bfd). */ | |
8a3fe4f8 | 364 | error (_("\"%s\" is not a core dump: %s"), |
ee0c3293 | 365 | filename.get (), bfd_errmsg (bfd_get_error ())); |
c906108c SS |
366 | } |
367 | ||
aff410f1 MS |
368 | /* Looks semi-reasonable. Toss the old core file and work on the |
369 | new. */ | |
c906108c | 370 | |
c906108c | 371 | unpush_target (&core_ops); |
192b62ce | 372 | core_bfd = temp_bfd.release (); |
74b7792f | 373 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 374 | |
0e24ac5d MK |
375 | core_gdbarch = gdbarch_from_bfd (core_bfd); |
376 | ||
2acceee2 JM |
377 | /* Find a suitable core file handler to munch on core_bfd */ |
378 | core_vec = sniff_core_bfd (core_bfd); | |
379 | ||
c906108c SS |
380 | validate_files (); |
381 | ||
41bf6aca | 382 | core_data = XCNEW (struct target_section_table); |
07b82ea5 | 383 | |
c906108c | 384 | /* Find the data section */ |
07b82ea5 | 385 | if (build_section_table (core_bfd, |
aff410f1 MS |
386 | &core_data->sections, |
387 | &core_data->sections_end)) | |
8a3fe4f8 | 388 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
389 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
390 | ||
2f1b5984 MK |
391 | /* If we have no exec file, try to set the architecture from the |
392 | core file. We don't do this unconditionally since an exec file | |
393 | typically contains more information that helps us determine the | |
394 | architecture than a core file. */ | |
395 | if (!exec_bfd) | |
396 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 397 | |
87ab71f0 | 398 | push_target (&core_ops); |
c906108c SS |
399 | discard_cleanups (old_chain); |
400 | ||
0de3b513 PA |
401 | /* Do this before acknowledging the inferior, so if |
402 | post_create_inferior throws (can happen easilly if you're loading | |
403 | a core file with the wrong exec), we aren't left with threads | |
404 | from the previous inferior. */ | |
405 | init_thread_list (); | |
406 | ||
3cdd9356 | 407 | inferior_ptid = null_ptid; |
0de3b513 | 408 | |
739fc47a PA |
409 | /* Need to flush the register cache (and the frame cache) from a |
410 | previous debug session. If inferior_ptid ends up the same as the | |
411 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
412 | core2; core core1; core core2 --- then there's potential for | |
413 | get_current_regcache to return the cached regcache of the | |
414 | previous session, and the frame cache being stale. */ | |
415 | registers_changed (); | |
416 | ||
0de3b513 PA |
417 | /* Build up thread list from BFD sections, and possibly set the |
418 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 419 | section. */ |
0de3b513 PA |
420 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
421 | bfd_get_section_by_name (core_bfd, ".reg")); | |
422 | ||
3cdd9356 PA |
423 | if (ptid_equal (inferior_ptid, null_ptid)) |
424 | { | |
425 | /* Either we found no .reg/NN section, and hence we have a | |
426 | non-threaded core (single-threaded, from gdb's perspective), | |
427 | or for some reason add_to_thread_list couldn't determine | |
428 | which was the "main" thread. The latter case shouldn't | |
429 | usually happen, but we're dealing with input here, which can | |
430 | always be broken in different ways. */ | |
431 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 432 | |
3cdd9356 PA |
433 | if (thread == NULL) |
434 | { | |
c45ceae0 | 435 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
436 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
437 | add_thread_silent (inferior_ptid); | |
438 | } | |
439 | else | |
440 | switch_to_thread (thread->ptid); | |
441 | } | |
442 | ||
959b8724 PA |
443 | post_create_inferior (&core_ops, from_tty); |
444 | ||
0de3b513 PA |
445 | /* Now go through the target stack looking for threads since there |
446 | may be a thread_stratum target loaded on top of target core by | |
447 | now. The layer above should claim threads found in the BFD | |
448 | sections. */ | |
492d29ea | 449 | TRY |
8e7b59a5 | 450 | { |
e8032dde | 451 | target_update_thread_list (); |
8e7b59a5 KS |
452 | } |
453 | ||
492d29ea PA |
454 | CATCH (except, RETURN_MASK_ERROR) |
455 | { | |
456 | exception_print (gdb_stderr, except); | |
457 | } | |
458 | END_CATCH | |
0de3b513 | 459 | |
c906108c SS |
460 | p = bfd_core_file_failing_command (core_bfd); |
461 | if (p) | |
a3f17187 | 462 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c | 463 | |
0c557179 SDJ |
464 | /* Clearing any previous state of convenience variables. */ |
465 | clear_exit_convenience_vars (); | |
466 | ||
c906108c SS |
467 | siggy = bfd_core_file_failing_signal (core_bfd); |
468 | if (siggy > 0) | |
423ec54c | 469 | { |
22203bbf | 470 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
471 | core (map gdb_signal from host signals). If we do have |
472 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
473 | implementation for that gdbarch, as a fallback measure, | |
474 | assume the host signal mapping. It'll be correct for native | |
475 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 476 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
477 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
478 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
479 | siggy) | |
480 | : gdb_signal_from_host (siggy)); | |
423ec54c | 481 | |
2d503272 PM |
482 | printf_filtered (_("Program terminated with signal %s, %s.\n"), |
483 | gdb_signal_to_name (sig), gdb_signal_to_string (sig)); | |
0c557179 SDJ |
484 | |
485 | /* Set the value of the internal variable $_exitsignal, | |
486 | which holds the signal uncaught by the inferior. */ | |
487 | set_internalvar_integer (lookup_internalvar ("_exitsignal"), | |
488 | siggy); | |
423ec54c | 489 | } |
c906108c | 490 | |
87ab71f0 PA |
491 | /* Fetch all registers from core file. */ |
492 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 493 | |
87ab71f0 PA |
494 | /* Now, set up the frame cache, and print the top of stack. */ |
495 | reinit_frame_cache (); | |
08d72866 | 496 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
f0e8c4c5 JK |
497 | |
498 | /* Current thread should be NUM 1 but the user does not know that. | |
499 | If a program is single threaded gdb in general does not mention | |
500 | anything about threads. That is why the test is >= 2. */ | |
501 | if (thread_count () >= 2) | |
502 | { | |
492d29ea | 503 | TRY |
f0e8c4c5 JK |
504 | { |
505 | thread_command (NULL, from_tty); | |
506 | } | |
492d29ea PA |
507 | CATCH (except, RETURN_MASK_ERROR) |
508 | { | |
509 | exception_print (gdb_stderr, except); | |
510 | } | |
511 | END_CATCH | |
f0e8c4c5 | 512 | } |
c906108c SS |
513 | } |
514 | ||
f6ac5f3d PA |
515 | void |
516 | core_target::detach (inferior *inf, int from_tty) | |
c906108c | 517 | { |
f6ac5f3d | 518 | unpush_target (this); |
c906108c SS |
519 | reinit_frame_cache (); |
520 | if (from_tty) | |
a3f17187 | 521 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
522 | } |
523 | ||
de57eccd JM |
524 | /* Try to retrieve registers from a section in core_bfd, and supply |
525 | them to core_vec->core_read_registers, as the register set numbered | |
526 | WHICH. | |
527 | ||
11a33714 SM |
528 | If ptid's lwp member is zero, do the single-threaded |
529 | thing: look for a section named NAME. If ptid's lwp | |
0de3b513 PA |
530 | member is non-zero, do the multi-threaded thing: look for a section |
531 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
11a33714 | 532 | representation of ptid's lwp member. |
de57eccd JM |
533 | |
534 | HUMAN_NAME is a human-readable name for the kind of registers the | |
535 | NAME section contains, for use in error messages. | |
536 | ||
537 | If REQUIRED is non-zero, print an error if the core file doesn't | |
aff410f1 MS |
538 | have a section by the appropriate name. Otherwise, just do |
539 | nothing. */ | |
de57eccd JM |
540 | |
541 | static void | |
9eefc95f | 542 | get_core_register_section (struct regcache *regcache, |
8f0435f7 | 543 | const struct regset *regset, |
1b1818e4 | 544 | const char *name, |
8f0435f7 | 545 | int min_size, |
de57eccd | 546 | int which, |
1b1818e4 | 547 | const char *human_name, |
de57eccd JM |
548 | int required) |
549 | { | |
7be0c536 | 550 | struct bfd_section *section; |
de57eccd JM |
551 | bfd_size_type size; |
552 | char *contents; | |
874a1c8c AT |
553 | bool variable_size_section = (regset != NULL |
554 | && regset->flags & REGSET_VARIABLE_SIZE); | |
de57eccd | 555 | |
3c3ae77e | 556 | thread_section_name section_name (name, regcache->ptid ()); |
de57eccd | 557 | |
3c3ae77e | 558 | section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); |
de57eccd JM |
559 | if (! section) |
560 | { | |
561 | if (required) | |
aff410f1 MS |
562 | warning (_("Couldn't find %s registers in core file."), |
563 | human_name); | |
de57eccd JM |
564 | return; |
565 | } | |
566 | ||
567 | size = bfd_section_size (core_bfd, section); | |
8f0435f7 AA |
568 | if (size < min_size) |
569 | { | |
3c3ae77e PA |
570 | warning (_("Section `%s' in core file too small."), |
571 | section_name.c_str ()); | |
8f0435f7 AA |
572 | return; |
573 | } | |
874a1c8c | 574 | if (size != min_size && !variable_size_section) |
f962539a AA |
575 | { |
576 | warning (_("Unexpected size of section `%s' in core file."), | |
3c3ae77e | 577 | section_name.c_str ()); |
f962539a | 578 | } |
8f0435f7 | 579 | |
224c3ddb | 580 | contents = (char *) alloca (size); |
de57eccd JM |
581 | if (! bfd_get_section_contents (core_bfd, section, contents, |
582 | (file_ptr) 0, size)) | |
583 | { | |
8a3fe4f8 | 584 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
3c3ae77e | 585 | human_name, section_name.c_str ()); |
de57eccd JM |
586 | return; |
587 | } | |
588 | ||
8f0435f7 AA |
589 | if (regset != NULL) |
590 | { | |
9eefc95f | 591 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
592 | return; |
593 | } | |
594 | ||
595 | gdb_assert (core_vec); | |
9eefc95f | 596 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
597 | ((CORE_ADDR) |
598 | bfd_section_vma (core_bfd, section))); | |
599 | } | |
600 | ||
5aa82d05 AA |
601 | /* Callback for get_core_registers that handles a single core file |
602 | register note section. */ | |
603 | ||
604 | static void | |
605 | get_core_registers_cb (const char *sect_name, int size, | |
8f0435f7 | 606 | const struct regset *regset, |
5aa82d05 AA |
607 | const char *human_name, void *cb_data) |
608 | { | |
609 | struct regcache *regcache = (struct regcache *) cb_data; | |
8f0435f7 | 610 | int required = 0; |
5aa82d05 AA |
611 | |
612 | if (strcmp (sect_name, ".reg") == 0) | |
8f0435f7 AA |
613 | { |
614 | required = 1; | |
615 | if (human_name == NULL) | |
616 | human_name = "general-purpose"; | |
617 | } | |
5aa82d05 | 618 | else if (strcmp (sect_name, ".reg2") == 0) |
8f0435f7 AA |
619 | { |
620 | if (human_name == NULL) | |
621 | human_name = "floating-point"; | |
622 | } | |
623 | ||
624 | /* The 'which' parameter is only used when no regset is provided. | |
625 | Thus we just set it to -1. */ | |
626 | get_core_register_section (regcache, regset, sect_name, | |
627 | size, -1, human_name, required); | |
5aa82d05 | 628 | } |
de57eccd | 629 | |
c906108c SS |
630 | /* Get the registers out of a core file. This is the machine- |
631 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
632 | part, typically implemented in the xm-file for each |
633 | architecture. */ | |
c906108c SS |
634 | |
635 | /* We just get all the registers, so we don't use regno. */ | |
636 | ||
f6ac5f3d PA |
637 | void |
638 | core_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 639 | { |
9c5ea4d9 | 640 | int i; |
5aa82d05 | 641 | struct gdbarch *gdbarch; |
c906108c | 642 | |
29082443 | 643 | if (!(core_gdbarch && gdbarch_iterate_over_regset_sections_p (core_gdbarch)) |
0e24ac5d | 644 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) |
c906108c SS |
645 | { |
646 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 647 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
648 | return; |
649 | } | |
650 | ||
ac7936df | 651 | gdbarch = regcache->arch (); |
5aa82d05 AA |
652 | if (gdbarch_iterate_over_regset_sections_p (gdbarch)) |
653 | gdbarch_iterate_over_regset_sections (gdbarch, | |
654 | get_core_registers_cb, | |
655 | (void *) regcache, NULL); | |
1b1818e4 UW |
656 | else |
657 | { | |
8f0435f7 AA |
658 | get_core_register_section (regcache, NULL, |
659 | ".reg", 0, 0, "general-purpose", 1); | |
660 | get_core_register_section (regcache, NULL, | |
661 | ".reg2", 0, 2, "floating-point", 0); | |
1b1818e4 | 662 | } |
c906108c | 663 | |
ee99023e | 664 | /* Mark all registers not found in the core as unavailable. */ |
ac7936df | 665 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
ee99023e | 666 | if (regcache_register_status (regcache, i) == REG_UNKNOWN) |
9c5ea4d9 | 667 | regcache_raw_supply (regcache, i, NULL); |
c906108c SS |
668 | } |
669 | ||
f6ac5f3d PA |
670 | void |
671 | core_target::files_info () | |
c906108c | 672 | { |
07b82ea5 | 673 | print_section_info (core_data, core_bfd); |
c906108c | 674 | } |
e2544d02 | 675 | \f |
efcbbd14 UW |
676 | struct spuid_list |
677 | { | |
678 | gdb_byte *buf; | |
679 | ULONGEST offset; | |
680 | LONGEST len; | |
681 | ULONGEST pos; | |
682 | ULONGEST written; | |
683 | }; | |
684 | ||
685 | static void | |
686 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
687 | { | |
9a3c8263 | 688 | struct spuid_list *list = (struct spuid_list *) list_p; |
efcbbd14 | 689 | enum bfd_endian byte_order |
aff410f1 | 690 | = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
efcbbd14 UW |
691 | int fd, pos = 0; |
692 | ||
693 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
694 | if (pos == 0) | |
695 | return; | |
696 | ||
697 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
698 | { | |
699 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
700 | 4, byte_order, fd); | |
701 | list->written += 4; | |
702 | } | |
703 | list->pos += 4; | |
704 | } | |
705 | ||
f6ac5f3d PA |
706 | enum target_xfer_status |
707 | core_target::xfer_partial (enum target_object object, const char *annex, | |
708 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
709 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
e2544d02 RM |
710 | { |
711 | switch (object) | |
712 | { | |
713 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 | 714 | return section_table_xfer_memory_partial (readbuf, writebuf, |
9b409511 | 715 | offset, len, xfered_len, |
07b82ea5 PA |
716 | core_data->sections, |
717 | core_data->sections_end, | |
718 | NULL); | |
e2544d02 RM |
719 | |
720 | case TARGET_OBJECT_AUXV: | |
721 | if (readbuf) | |
722 | { | |
723 | /* When the aux vector is stored in core file, BFD | |
724 | represents this with a fake section called ".auxv". */ | |
725 | ||
c4c5b7ba | 726 | struct bfd_section *section; |
e2544d02 | 727 | bfd_size_type size; |
e2544d02 RM |
728 | |
729 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
730 | if (section == NULL) | |
2ed4b548 | 731 | return TARGET_XFER_E_IO; |
e2544d02 RM |
732 | |
733 | size = bfd_section_size (core_bfd, section); | |
734 | if (offset >= size) | |
9b409511 | 735 | return TARGET_XFER_EOF; |
e2544d02 RM |
736 | size -= offset; |
737 | if (size > len) | |
738 | size = len; | |
9b409511 YQ |
739 | |
740 | if (size == 0) | |
741 | return TARGET_XFER_EOF; | |
742 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
743 | (file_ptr) offset, size)) | |
e2544d02 | 744 | { |
8a3fe4f8 | 745 | warning (_("Couldn't read NT_AUXV note in core file.")); |
2ed4b548 | 746 | return TARGET_XFER_E_IO; |
e2544d02 RM |
747 | } |
748 | ||
9b409511 YQ |
749 | *xfered_len = (ULONGEST) size; |
750 | return TARGET_XFER_OK; | |
e2544d02 | 751 | } |
2ed4b548 | 752 | return TARGET_XFER_E_IO; |
e2544d02 | 753 | |
403e1656 MK |
754 | case TARGET_OBJECT_WCOOKIE: |
755 | if (readbuf) | |
756 | { | |
757 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
758 | represents this with a fake section called |
759 | ".wcookie". */ | |
403e1656 MK |
760 | |
761 | struct bfd_section *section; | |
762 | bfd_size_type size; | |
403e1656 MK |
763 | |
764 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
765 | if (section == NULL) | |
2ed4b548 | 766 | return TARGET_XFER_E_IO; |
403e1656 MK |
767 | |
768 | size = bfd_section_size (core_bfd, section); | |
769 | if (offset >= size) | |
96c4f946 | 770 | return TARGET_XFER_EOF; |
403e1656 MK |
771 | size -= offset; |
772 | if (size > len) | |
773 | size = len; | |
9b409511 YQ |
774 | |
775 | if (size == 0) | |
776 | return TARGET_XFER_EOF; | |
777 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
778 | (file_ptr) offset, size)) | |
403e1656 | 779 | { |
8a3fe4f8 | 780 | warning (_("Couldn't read StackGhost cookie in core file.")); |
2ed4b548 | 781 | return TARGET_XFER_E_IO; |
403e1656 MK |
782 | } |
783 | ||
9b409511 YQ |
784 | *xfered_len = (ULONGEST) size; |
785 | return TARGET_XFER_OK; | |
786 | ||
403e1656 | 787 | } |
2ed4b548 | 788 | return TARGET_XFER_E_IO; |
403e1656 | 789 | |
de584861 PA |
790 | case TARGET_OBJECT_LIBRARIES: |
791 | if (core_gdbarch | |
792 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
793 | { | |
794 | if (writebuf) | |
2ed4b548 | 795 | return TARGET_XFER_E_IO; |
9b409511 YQ |
796 | else |
797 | { | |
798 | *xfered_len = gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
799 | readbuf, | |
800 | offset, len); | |
801 | ||
802 | if (*xfered_len == 0) | |
803 | return TARGET_XFER_EOF; | |
804 | else | |
805 | return TARGET_XFER_OK; | |
806 | } | |
de584861 PA |
807 | } |
808 | /* FALL THROUGH */ | |
809 | ||
356a5233 JB |
810 | case TARGET_OBJECT_LIBRARIES_AIX: |
811 | if (core_gdbarch | |
812 | && gdbarch_core_xfer_shared_libraries_aix_p (core_gdbarch)) | |
813 | { | |
814 | if (writebuf) | |
2ed4b548 | 815 | return TARGET_XFER_E_IO; |
9b409511 YQ |
816 | else |
817 | { | |
818 | *xfered_len | |
819 | = gdbarch_core_xfer_shared_libraries_aix (core_gdbarch, | |
820 | readbuf, offset, | |
821 | len); | |
822 | ||
823 | if (*xfered_len == 0) | |
824 | return TARGET_XFER_EOF; | |
825 | else | |
826 | return TARGET_XFER_OK; | |
827 | } | |
356a5233 JB |
828 | } |
829 | /* FALL THROUGH */ | |
830 | ||
efcbbd14 UW |
831 | case TARGET_OBJECT_SPU: |
832 | if (readbuf && annex) | |
833 | { | |
834 | /* When the SPU contexts are stored in a core file, BFD | |
aff410f1 MS |
835 | represents this with a fake section called |
836 | "SPU/<annex>". */ | |
efcbbd14 UW |
837 | |
838 | struct bfd_section *section; | |
839 | bfd_size_type size; | |
efcbbd14 | 840 | char sectionstr[100]; |
c5504eaf | 841 | |
efcbbd14 UW |
842 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
843 | ||
844 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
845 | if (section == NULL) | |
2ed4b548 | 846 | return TARGET_XFER_E_IO; |
efcbbd14 UW |
847 | |
848 | size = bfd_section_size (core_bfd, section); | |
849 | if (offset >= size) | |
9b409511 | 850 | return TARGET_XFER_EOF; |
efcbbd14 UW |
851 | size -= offset; |
852 | if (size > len) | |
853 | size = len; | |
9b409511 YQ |
854 | |
855 | if (size == 0) | |
856 | return TARGET_XFER_EOF; | |
857 | if (!bfd_get_section_contents (core_bfd, section, readbuf, | |
858 | (file_ptr) offset, size)) | |
efcbbd14 UW |
859 | { |
860 | warning (_("Couldn't read SPU section in core file.")); | |
2ed4b548 | 861 | return TARGET_XFER_E_IO; |
efcbbd14 UW |
862 | } |
863 | ||
9b409511 YQ |
864 | *xfered_len = (ULONGEST) size; |
865 | return TARGET_XFER_OK; | |
efcbbd14 UW |
866 | } |
867 | else if (readbuf) | |
868 | { | |
869 | /* NULL annex requests list of all present spuids. */ | |
870 | struct spuid_list list; | |
c5504eaf | 871 | |
efcbbd14 UW |
872 | list.buf = readbuf; |
873 | list.offset = offset; | |
874 | list.len = len; | |
875 | list.pos = 0; | |
876 | list.written = 0; | |
877 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
9b409511 YQ |
878 | |
879 | if (list.written == 0) | |
880 | return TARGET_XFER_EOF; | |
881 | else | |
882 | { | |
883 | *xfered_len = (ULONGEST) list.written; | |
884 | return TARGET_XFER_OK; | |
885 | } | |
efcbbd14 | 886 | } |
2ed4b548 | 887 | return TARGET_XFER_E_IO; |
efcbbd14 | 888 | |
9015683b TT |
889 | case TARGET_OBJECT_SIGNAL_INFO: |
890 | if (readbuf) | |
9b409511 | 891 | { |
382b69bb JB |
892 | if (core_gdbarch |
893 | && gdbarch_core_xfer_siginfo_p (core_gdbarch)) | |
9b409511 | 894 | { |
382b69bb JB |
895 | LONGEST l = gdbarch_core_xfer_siginfo (core_gdbarch, readbuf, |
896 | offset, len); | |
897 | ||
898 | if (l >= 0) | |
899 | { | |
900 | *xfered_len = l; | |
901 | if (l == 0) | |
902 | return TARGET_XFER_EOF; | |
903 | else | |
904 | return TARGET_XFER_OK; | |
905 | } | |
9b409511 YQ |
906 | } |
907 | } | |
2ed4b548 | 908 | return TARGET_XFER_E_IO; |
9015683b | 909 | |
e2544d02 | 910 | default: |
f6ac5f3d PA |
911 | return this->beneath->xfer_partial (object, annex, readbuf, |
912 | writebuf, offset, len, | |
913 | xfered_len); | |
e2544d02 RM |
914 | } |
915 | } | |
916 | ||
c906108c | 917 | \f |
c906108c SS |
918 | |
919 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
920 | exactly lively, are they? On the other hand, if we don't claim | |
921 | that each & every one is alive, then we don't get any of them | |
922 | to appear in an "info thread" command, which is quite a useful | |
923 | behaviour. | |
c5aa993b | 924 | */ |
57810aa7 | 925 | bool |
f6ac5f3d | 926 | core_target::thread_alive (ptid_t ptid) |
c906108c | 927 | { |
57810aa7 | 928 | return true; |
c906108c SS |
929 | } |
930 | ||
4eb0ad19 DJ |
931 | /* Ask the current architecture what it knows about this core file. |
932 | That will be used, in turn, to pick a better architecture. This | |
933 | wrapper could be avoided if targets got a chance to specialize | |
934 | core_ops. */ | |
935 | ||
f6ac5f3d PA |
936 | const struct target_desc * |
937 | core_target::read_description () | |
4eb0ad19 | 938 | { |
a78c2d62 | 939 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
2117c711 TT |
940 | { |
941 | const struct target_desc *result; | |
942 | ||
f6ac5f3d | 943 | result = gdbarch_core_read_description (core_gdbarch, this, core_bfd); |
2117c711 TT |
944 | if (result != NULL) |
945 | return result; | |
946 | } | |
4eb0ad19 | 947 | |
f6ac5f3d | 948 | return this->beneath->read_description (); |
4eb0ad19 DJ |
949 | } |
950 | ||
f6ac5f3d PA |
951 | const char * |
952 | core_target::pid_to_str (ptid_t ptid) | |
0de3b513 PA |
953 | { |
954 | static char buf[64]; | |
88f38a04 | 955 | struct inferior *inf; |
a5ee0f0c | 956 | int pid; |
0de3b513 | 957 | |
a5ee0f0c PA |
958 | /* The preferred way is to have a gdbarch/OS specific |
959 | implementation. */ | |
28439f5e PA |
960 | if (core_gdbarch |
961 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 962 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 963 | |
a5ee0f0c PA |
964 | /* Otherwise, if we don't have one, we'll just fallback to |
965 | "process", with normal_pid_to_str. */ | |
28439f5e | 966 | |
a5ee0f0c PA |
967 | /* Try the LWPID field first. */ |
968 | pid = ptid_get_lwp (ptid); | |
969 | if (pid != 0) | |
970 | return normal_pid_to_str (pid_to_ptid (pid)); | |
971 | ||
972 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
973 | only if it isn't a fake PID. */ | |
c9657e70 | 974 | inf = find_inferior_ptid (ptid); |
88f38a04 | 975 | if (inf != NULL && !inf->fake_pid_p) |
a5ee0f0c | 976 | return normal_pid_to_str (ptid); |
0de3b513 | 977 | |
a5ee0f0c PA |
978 | /* No luck. We simply don't have a valid PID to print. */ |
979 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
980 | return buf; |
981 | } | |
982 | ||
f6ac5f3d PA |
983 | const char * |
984 | core_target::thread_name (struct thread_info *thr) | |
4dfc5dbc JB |
985 | { |
986 | if (core_gdbarch | |
987 | && gdbarch_core_thread_name_p (core_gdbarch)) | |
988 | return gdbarch_core_thread_name (core_gdbarch, thr); | |
989 | return NULL; | |
990 | } | |
991 | ||
57810aa7 | 992 | bool |
f6ac5f3d | 993 | core_target::has_memory () |
c35b1492 PA |
994 | { |
995 | return (core_bfd != NULL); | |
996 | } | |
997 | ||
57810aa7 | 998 | bool |
f6ac5f3d | 999 | core_target::has_stack () |
c35b1492 PA |
1000 | { |
1001 | return (core_bfd != NULL); | |
1002 | } | |
1003 | ||
57810aa7 | 1004 | bool |
f6ac5f3d | 1005 | core_target::has_registers () |
c35b1492 PA |
1006 | { |
1007 | return (core_bfd != NULL); | |
1008 | } | |
1009 | ||
451b7c33 TT |
1010 | /* Implement the to_info_proc method. */ |
1011 | ||
f6ac5f3d PA |
1012 | bool |
1013 | core_target::info_proc (const char *args, enum info_proc_what request) | |
451b7c33 TT |
1014 | { |
1015 | struct gdbarch *gdbarch = get_current_arch (); | |
1016 | ||
1017 | /* Since this is the core file target, call the 'core_info_proc' | |
1018 | method on gdbarch, not 'info_proc'. */ | |
1019 | if (gdbarch_core_info_proc_p (gdbarch)) | |
1020 | gdbarch_core_info_proc (gdbarch, args, request); | |
c906108c | 1021 | |
f6ac5f3d | 1022 | return true; |
c906108c SS |
1023 | } |
1024 | ||
c906108c | 1025 | void |
fba45db2 | 1026 | _initialize_corelow (void) |
c906108c | 1027 | { |
f6ac5f3d PA |
1028 | if (the_core_target != NULL) |
1029 | internal_error (__FILE__, __LINE__, | |
1030 | _("core target already exists (\"%s\")."), | |
1031 | the_core_target->longname ()); | |
1032 | the_core_target = &core_ops; | |
c906108c | 1033 | |
9852c492 | 1034 | add_target_with_completer (&core_ops, filename_completer); |
c906108c | 1035 | } |