Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
28e7fd62 | 3 | Copyright (C) 1986-2013 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 "gdb_string.h" |
23 | #include <errno.h> | |
24 | #include <signal.h> | |
25 | #include <fcntl.h> | |
fc24370e MS |
26 | #ifdef HAVE_SYS_FILE_H |
27 | #include <sys/file.h> /* needed for F_OK and friends */ | |
28 | #endif | |
c5aa993b | 29 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
30 | #include "inferior.h" |
31 | #include "symtab.h" | |
32 | #include "command.h" | |
33 | #include "bfd.h" | |
34 | #include "target.h" | |
35 | #include "gdbcore.h" | |
36 | #include "gdbthread.h" | |
4e052eda | 37 | #include "regcache.h" |
0e24ac5d | 38 | #include "regset.h" |
990f9fe3 | 39 | #include "symfile.h" |
4646aa9d | 40 | #include "exec.h" |
dbda9972 | 41 | #include "readline/readline.h" |
0e24ac5d | 42 | #include "gdb_assert.h" |
60250e8b | 43 | #include "exceptions.h" |
a77053c2 | 44 | #include "solib.h" |
f90c07ac | 45 | #include "filenames.h" |
6c95b8df | 46 | #include "progspace.h" |
516ba659 | 47 | #include "objfiles.h" |
cbb099e8 | 48 | #include "gdb_bfd.h" |
8e860359 | 49 | |
ee28ca0f AC |
50 | #ifndef O_LARGEFILE |
51 | #define O_LARGEFILE 0 | |
52 | #endif | |
53 | ||
00e32a35 AC |
54 | /* List of all available core_fns. On gdb startup, each core file |
55 | register reader calls deprecated_add_core_fns() to register | |
56 | information on each core format it is prepared to read. */ | |
c906108c SS |
57 | |
58 | static struct core_fns *core_file_fns = NULL; | |
59 | ||
aff410f1 MS |
60 | /* The core_fns for a core file handler that is prepared to read the |
61 | core file currently open on core_bfd. */ | |
2acceee2 JM |
62 | |
63 | static struct core_fns *core_vec = NULL; | |
64 | ||
0e24ac5d MK |
65 | /* FIXME: kettenis/20031023: Eventually this variable should |
66 | disappear. */ | |
67 | ||
68 | struct gdbarch *core_gdbarch = NULL; | |
69 | ||
07b82ea5 PA |
70 | /* Per-core data. Currently, only the section table. Note that these |
71 | target sections are *not* mapped in the current address spaces' set | |
72 | of target sections --- those should come only from pure executable | |
73 | or shared library bfds. The core bfd sections are an | |
74 | implementation detail of the core target, just like ptrace is for | |
75 | unix child targets. */ | |
76 | static struct target_section_table *core_data; | |
77 | ||
a14ed312 | 78 | static void core_files_info (struct target_ops *); |
c906108c | 79 | |
a14ed312 | 80 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 81 | |
020cc13c | 82 | static int gdb_check_format (bfd *); |
2acceee2 | 83 | |
a14ed312 | 84 | static void core_open (char *, int); |
c906108c | 85 | |
136d6dae | 86 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 87 | |
460014f5 | 88 | static void core_close (void); |
c906108c | 89 | |
74b7792f AC |
90 | static void core_close_cleanup (void *ignore); |
91 | ||
4efb68b1 | 92 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 93 | |
a14ed312 | 94 | static void init_core_ops (void); |
c906108c | 95 | |
a14ed312 | 96 | void _initialize_corelow (void); |
c906108c | 97 | |
c0edd9ed | 98 | static struct target_ops core_ops; |
c906108c | 99 | |
7f9f62ba PA |
100 | /* An arbitrary identifier for the core inferior. */ |
101 | #define CORELOW_PID 1 | |
102 | ||
aff410f1 MS |
103 | /* Link a new core_fns into the global core_file_fns list. Called on |
104 | gdb startup by the _initialize routine in each core file register | |
b021a221 | 105 | reader, to register information about each format the reader is |
aff410f1 | 106 | prepared to handle. */ |
c906108c SS |
107 | |
108 | void | |
00e32a35 | 109 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 110 | { |
c5aa993b | 111 | cf->next = core_file_fns; |
c906108c SS |
112 | core_file_fns = cf; |
113 | } | |
114 | ||
2acceee2 JM |
115 | /* The default function that core file handlers can use to examine a |
116 | core file BFD and decide whether or not to accept the job of | |
aff410f1 | 117 | reading the core file. */ |
2acceee2 JM |
118 | |
119 | int | |
fba45db2 | 120 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
121 | { |
122 | int result; | |
123 | ||
124 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
125 | return (result); | |
126 | } | |
127 | ||
128 | /* Walk through the list of core functions to find a set that can | |
06b9f45f | 129 | handle the core file open on ABFD. Returns pointer to set that is |
aff410f1 | 130 | selected. */ |
2acceee2 JM |
131 | |
132 | static struct core_fns * | |
fba45db2 | 133 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
134 | { |
135 | struct core_fns *cf; | |
136 | struct core_fns *yummy = NULL; | |
137 | int matches = 0;; | |
138 | ||
aff410f1 MS |
139 | /* Don't sniff if we have support for register sets in |
140 | CORE_GDBARCH. */ | |
0e24ac5d MK |
141 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
142 | return NULL; | |
143 | ||
2acceee2 JM |
144 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
145 | { | |
146 | if (cf->core_sniffer (cf, abfd)) | |
147 | { | |
148 | yummy = cf; | |
149 | matches++; | |
150 | } | |
151 | } | |
152 | if (matches > 1) | |
153 | { | |
8a3fe4f8 | 154 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
155 | bfd_get_filename (abfd), matches); |
156 | } | |
157 | else if (matches == 0) | |
06b9f45f JK |
158 | error (_("\"%s\": no core file handler recognizes format"), |
159 | bfd_get_filename (abfd)); | |
160 | ||
2acceee2 JM |
161 | return (yummy); |
162 | } | |
163 | ||
164 | /* The default is to reject every core file format we see. Either | |
165 | BFD has to recognize it, or we have to provide a function in the | |
aff410f1 | 166 | core file handler that recognizes it. */ |
2acceee2 JM |
167 | |
168 | int | |
fba45db2 | 169 | default_check_format (bfd *abfd) |
2acceee2 JM |
170 | { |
171 | return (0); | |
172 | } | |
173 | ||
aff410f1 | 174 | /* Attempt to recognize core file formats that BFD rejects. */ |
2acceee2 | 175 | |
020cc13c | 176 | static int |
fba45db2 | 177 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
178 | { |
179 | struct core_fns *cf; | |
180 | ||
181 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
182 | { | |
183 | if (cf->check_format (abfd)) | |
184 | { | |
81a9a963 | 185 | return (1); |
2acceee2 JM |
186 | } |
187 | } | |
81a9a963 | 188 | return (0); |
2acceee2 | 189 | } |
c906108c | 190 | |
aff410f1 MS |
191 | /* Discard all vestiges of any previous core file and mark data and |
192 | stack spaces as empty. */ | |
c906108c | 193 | |
c906108c | 194 | static void |
460014f5 | 195 | core_close (void) |
c906108c | 196 | { |
c906108c SS |
197 | if (core_bfd) |
198 | { | |
959b8724 | 199 | int pid = ptid_get_pid (inferior_ptid); |
aff410f1 MS |
200 | inferior_ptid = null_ptid; /* Avoid confusion from thread |
201 | stuff. */ | |
06b9f45f JK |
202 | if (pid != 0) |
203 | exit_inferior_silent (pid); | |
c906108c | 204 | |
aff410f1 MS |
205 | /* Clear out solib state while the bfd is still open. See |
206 | comments in clear_solib in solib.c. */ | |
a77053c2 | 207 | clear_solib (); |
7a292a7a | 208 | |
06b9f45f JK |
209 | if (core_data) |
210 | { | |
211 | xfree (core_data->sections); | |
212 | xfree (core_data); | |
213 | core_data = NULL; | |
214 | } | |
07b82ea5 | 215 | |
cbb099e8 | 216 | gdb_bfd_unref (core_bfd); |
c906108c | 217 | core_bfd = NULL; |
c906108c | 218 | } |
2acceee2 | 219 | core_vec = NULL; |
0e24ac5d | 220 | core_gdbarch = NULL; |
c906108c SS |
221 | } |
222 | ||
74b7792f AC |
223 | static void |
224 | core_close_cleanup (void *ignore) | |
225 | { | |
460014f5 | 226 | core_close (); |
74b7792f AC |
227 | } |
228 | ||
aff410f1 MS |
229 | /* Look for sections whose names start with `.reg/' so that we can |
230 | extract the list of threads in a core file. */ | |
c906108c SS |
231 | |
232 | static void | |
4efb68b1 | 233 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 234 | { |
0de3b513 | 235 | ptid_t ptid; |
3cdd9356 PA |
236 | int core_tid; |
237 | int pid, lwpid; | |
c906108c | 238 | asection *reg_sect = (asection *) reg_sect_arg; |
88f38a04 PA |
239 | int fake_pid_p = 0; |
240 | struct inferior *inf; | |
c906108c SS |
241 | |
242 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
243 | return; | |
244 | ||
3cdd9356 | 245 | core_tid = atoi (bfd_section_name (abfd, asect) + 5); |
c906108c | 246 | |
261b8d08 PA |
247 | pid = bfd_core_file_pid (core_bfd); |
248 | if (pid == 0) | |
3cdd9356 | 249 | { |
88f38a04 | 250 | fake_pid_p = 1; |
3cdd9356 | 251 | pid = CORELOW_PID; |
3cdd9356 | 252 | } |
0de3b513 | 253 | |
261b8d08 PA |
254 | lwpid = core_tid; |
255 | ||
88f38a04 PA |
256 | inf = current_inferior (); |
257 | if (inf->pid == 0) | |
258 | { | |
259 | inferior_appeared (inf, pid); | |
260 | inf->fake_pid_p = fake_pid_p; | |
261 | } | |
3cdd9356 PA |
262 | |
263 | ptid = ptid_build (pid, lwpid, 0); | |
264 | ||
265 | add_thread (ptid); | |
c906108c SS |
266 | |
267 | /* Warning, Will Robinson, looking at BFD private data! */ | |
268 | ||
269 | if (reg_sect != NULL | |
aff410f1 MS |
270 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
271 | inferior_ptid = ptid; /* Yes, make it current. */ | |
c906108c SS |
272 | } |
273 | ||
274 | /* This routine opens and sets up the core file bfd. */ | |
275 | ||
276 | static void | |
fba45db2 | 277 | core_open (char *filename, int from_tty) |
c906108c SS |
278 | { |
279 | const char *p; | |
280 | int siggy; | |
281 | struct cleanup *old_chain; | |
282 | char *temp; | |
283 | bfd *temp_bfd; | |
c906108c | 284 | int scratch_chan; |
ee28ca0f | 285 | int flags; |
8e7b59a5 | 286 | volatile struct gdb_exception except; |
c906108c SS |
287 | |
288 | target_preopen (from_tty); | |
289 | if (!filename) | |
290 | { | |
8a3fe4f8 | 291 | if (core_bfd) |
3e43a32a MS |
292 | error (_("No core file specified. (Use `detach' " |
293 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
294 | else |
295 | error (_("No core file specified.")); | |
c906108c SS |
296 | } |
297 | ||
298 | filename = tilde_expand (filename); | |
aff410f1 | 299 | if (!IS_ABSOLUTE_PATH (filename)) |
c906108c | 300 | { |
aff410f1 MS |
301 | temp = concat (current_directory, "/", |
302 | filename, (char *) NULL); | |
b8c9b27d | 303 | xfree (filename); |
c906108c SS |
304 | filename = temp; |
305 | } | |
306 | ||
b8c9b27d | 307 | old_chain = make_cleanup (xfree, filename); |
c906108c | 308 | |
ee28ca0f AC |
309 | flags = O_BINARY | O_LARGEFILE; |
310 | if (write_files) | |
311 | flags |= O_RDWR; | |
312 | else | |
313 | flags |= O_RDONLY; | |
314 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
315 | if (scratch_chan < 0) |
316 | perror_with_name (filename); | |
317 | ||
64c31149 TT |
318 | temp_bfd = gdb_bfd_fopen (filename, gnutarget, |
319 | write_files ? FOPEN_RUB : FOPEN_RB, | |
320 | scratch_chan); | |
c906108c SS |
321 | if (temp_bfd == NULL) |
322 | perror_with_name (filename); | |
323 | ||
5aafa1cc PM |
324 | if (!bfd_check_format (temp_bfd, bfd_core) |
325 | && !gdb_check_format (temp_bfd)) | |
c906108c SS |
326 | { |
327 | /* Do it after the err msg */ | |
aff410f1 MS |
328 | /* FIXME: should be checking for errors from bfd_close (for one |
329 | thing, on error it does not free all the storage associated | |
330 | with the bfd). */ | |
f9a062ff | 331 | make_cleanup_bfd_unref (temp_bfd); |
8a3fe4f8 | 332 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
333 | filename, bfd_errmsg (bfd_get_error ())); |
334 | } | |
335 | ||
aff410f1 MS |
336 | /* Looks semi-reasonable. Toss the old core file and work on the |
337 | new. */ | |
c906108c | 338 | |
a4453b7e | 339 | do_cleanups (old_chain); |
c906108c SS |
340 | unpush_target (&core_ops); |
341 | core_bfd = temp_bfd; | |
74b7792f | 342 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 343 | |
0e24ac5d MK |
344 | core_gdbarch = gdbarch_from_bfd (core_bfd); |
345 | ||
2acceee2 JM |
346 | /* Find a suitable core file handler to munch on core_bfd */ |
347 | core_vec = sniff_core_bfd (core_bfd); | |
348 | ||
c906108c SS |
349 | validate_files (); |
350 | ||
07b82ea5 PA |
351 | core_data = XZALLOC (struct target_section_table); |
352 | ||
c906108c | 353 | /* Find the data section */ |
07b82ea5 | 354 | if (build_section_table (core_bfd, |
aff410f1 MS |
355 | &core_data->sections, |
356 | &core_data->sections_end)) | |
8a3fe4f8 | 357 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
358 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
359 | ||
2f1b5984 MK |
360 | /* If we have no exec file, try to set the architecture from the |
361 | core file. We don't do this unconditionally since an exec file | |
362 | typically contains more information that helps us determine the | |
363 | architecture than a core file. */ | |
364 | if (!exec_bfd) | |
365 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 366 | |
87ab71f0 | 367 | push_target (&core_ops); |
c906108c SS |
368 | discard_cleanups (old_chain); |
369 | ||
0de3b513 PA |
370 | /* Do this before acknowledging the inferior, so if |
371 | post_create_inferior throws (can happen easilly if you're loading | |
372 | a core file with the wrong exec), we aren't left with threads | |
373 | from the previous inferior. */ | |
374 | init_thread_list (); | |
375 | ||
3cdd9356 | 376 | inferior_ptid = null_ptid; |
0de3b513 | 377 | |
739fc47a PA |
378 | /* Need to flush the register cache (and the frame cache) from a |
379 | previous debug session. If inferior_ptid ends up the same as the | |
380 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
381 | core2; core core1; core core2 --- then there's potential for | |
382 | get_current_regcache to return the cached regcache of the | |
383 | previous session, and the frame cache being stale. */ | |
384 | registers_changed (); | |
385 | ||
0de3b513 PA |
386 | /* Build up thread list from BFD sections, and possibly set the |
387 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 388 | section. */ |
0de3b513 PA |
389 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
390 | bfd_get_section_by_name (core_bfd, ".reg")); | |
391 | ||
3cdd9356 PA |
392 | if (ptid_equal (inferior_ptid, null_ptid)) |
393 | { | |
394 | /* Either we found no .reg/NN section, and hence we have a | |
395 | non-threaded core (single-threaded, from gdb's perspective), | |
396 | or for some reason add_to_thread_list couldn't determine | |
397 | which was the "main" thread. The latter case shouldn't | |
398 | usually happen, but we're dealing with input here, which can | |
399 | always be broken in different ways. */ | |
400 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 401 | |
3cdd9356 PA |
402 | if (thread == NULL) |
403 | { | |
c45ceae0 | 404 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
405 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
406 | add_thread_silent (inferior_ptid); | |
407 | } | |
408 | else | |
409 | switch_to_thread (thread->ptid); | |
410 | } | |
411 | ||
959b8724 PA |
412 | post_create_inferior (&core_ops, from_tty); |
413 | ||
0de3b513 PA |
414 | /* Now go through the target stack looking for threads since there |
415 | may be a thread_stratum target loaded on top of target core by | |
416 | now. The layer above should claim threads found in the BFD | |
417 | sections. */ | |
8e7b59a5 KS |
418 | TRY_CATCH (except, RETURN_MASK_ERROR) |
419 | { | |
420 | target_find_new_threads (); | |
421 | } | |
422 | ||
423 | if (except.reason < 0) | |
424 | exception_print (gdb_stderr, except); | |
0de3b513 | 425 | |
c906108c SS |
426 | p = bfd_core_file_failing_command (core_bfd); |
427 | if (p) | |
a3f17187 | 428 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
429 | |
430 | siggy = bfd_core_file_failing_signal (core_bfd); | |
431 | if (siggy > 0) | |
423ec54c | 432 | { |
22203bbf | 433 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
434 | core (map gdb_signal from host signals). If we do have |
435 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
436 | implementation for that gdbarch, as a fallback measure, | |
437 | assume the host signal mapping. It'll be correct for native | |
438 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 439 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
440 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
441 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
442 | siggy) | |
443 | : gdb_signal_from_host (siggy)); | |
423ec54c | 444 | |
aff410f1 | 445 | printf_filtered (_("Program terminated with signal %d, %s.\n"), |
2ea28649 | 446 | siggy, gdb_signal_to_string (sig)); |
423ec54c | 447 | } |
c906108c | 448 | |
87ab71f0 PA |
449 | /* Fetch all registers from core file. */ |
450 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 451 | |
87ab71f0 PA |
452 | /* Now, set up the frame cache, and print the top of stack. */ |
453 | reinit_frame_cache (); | |
454 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
455 | } |
456 | ||
457 | static void | |
136d6dae | 458 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
459 | { |
460 | if (args) | |
8a3fe4f8 | 461 | error (_("Too many arguments")); |
136d6dae | 462 | unpush_target (ops); |
c906108c SS |
463 | reinit_frame_cache (); |
464 | if (from_tty) | |
a3f17187 | 465 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
466 | } |
467 | ||
07b82ea5 PA |
468 | #ifdef DEPRECATED_IBM6000_TARGET |
469 | ||
470 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
471 | pointer into the first new slot. This will not be necessary when | |
472 | the rs6000 target is converted to use the standard solib | |
473 | framework. */ | |
474 | ||
475 | struct target_section * | |
476 | deprecated_core_resize_section_table (int num_added) | |
477 | { | |
478 | int old_count; | |
479 | ||
480 | old_count = resize_section_table (core_data, num_added); | |
481 | return core_data->sections + old_count; | |
482 | } | |
483 | ||
484 | #endif | |
de57eccd JM |
485 | |
486 | /* Try to retrieve registers from a section in core_bfd, and supply | |
487 | them to core_vec->core_read_registers, as the register set numbered | |
488 | WHICH. | |
489 | ||
0de3b513 PA |
490 | If inferior_ptid's lwp member is zero, do the single-threaded |
491 | thing: look for a section named NAME. If inferior_ptid's lwp | |
492 | member is non-zero, do the multi-threaded thing: look for a section | |
493 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
494 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
495 | |
496 | HUMAN_NAME is a human-readable name for the kind of registers the | |
497 | NAME section contains, for use in error messages. | |
498 | ||
499 | If REQUIRED is non-zero, print an error if the core file doesn't | |
aff410f1 MS |
500 | have a section by the appropriate name. Otherwise, just do |
501 | nothing. */ | |
de57eccd JM |
502 | |
503 | static void | |
9eefc95f | 504 | get_core_register_section (struct regcache *regcache, |
1b1818e4 | 505 | const char *name, |
de57eccd | 506 | int which, |
1b1818e4 | 507 | const char *human_name, |
de57eccd JM |
508 | int required) |
509 | { | |
3ecda457 | 510 | static char *section_name = NULL; |
7be0c536 | 511 | struct bfd_section *section; |
de57eccd JM |
512 | bfd_size_type size; |
513 | char *contents; | |
514 | ||
3ecda457 | 515 | xfree (section_name); |
959b8724 | 516 | |
261b8d08 | 517 | if (ptid_get_lwp (inferior_ptid)) |
aff410f1 MS |
518 | section_name = xstrprintf ("%s/%ld", name, |
519 | ptid_get_lwp (inferior_ptid)); | |
de57eccd | 520 | else |
3ecda457 | 521 | section_name = xstrdup (name); |
de57eccd JM |
522 | |
523 | section = bfd_get_section_by_name (core_bfd, section_name); | |
524 | if (! section) | |
525 | { | |
526 | if (required) | |
aff410f1 MS |
527 | warning (_("Couldn't find %s registers in core file."), |
528 | human_name); | |
de57eccd JM |
529 | return; |
530 | } | |
531 | ||
532 | size = bfd_section_size (core_bfd, section); | |
533 | contents = alloca (size); | |
534 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
535 | (file_ptr) 0, size)) | |
536 | { | |
8a3fe4f8 | 537 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
538 | human_name, name); |
539 | return; | |
540 | } | |
541 | ||
0e24ac5d MK |
542 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
543 | { | |
544 | const struct regset *regset; | |
545 | ||
aff410f1 MS |
546 | regset = gdbarch_regset_from_core_section (core_gdbarch, |
547 | name, size); | |
0e24ac5d MK |
548 | if (regset == NULL) |
549 | { | |
550 | if (required) | |
8a3fe4f8 | 551 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
552 | human_name); |
553 | return; | |
554 | } | |
555 | ||
9eefc95f | 556 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
557 | return; |
558 | } | |
559 | ||
560 | gdb_assert (core_vec); | |
9eefc95f | 561 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
562 | ((CORE_ADDR) |
563 | bfd_section_vma (core_bfd, section))); | |
564 | } | |
565 | ||
566 | ||
c906108c SS |
567 | /* Get the registers out of a core file. This is the machine- |
568 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
569 | part, typically implemented in the xm-file for each |
570 | architecture. */ | |
c906108c SS |
571 | |
572 | /* We just get all the registers, so we don't use regno. */ | |
573 | ||
c906108c | 574 | static void |
28439f5e PA |
575 | get_core_registers (struct target_ops *ops, |
576 | struct regcache *regcache, int regno) | |
c906108c | 577 | { |
1b1818e4 | 578 | struct core_regset_section *sect_list; |
9c5ea4d9 | 579 | int i; |
c906108c | 580 | |
0e24ac5d MK |
581 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
582 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
583 | { |
584 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 585 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
586 | return; |
587 | } | |
588 | ||
1b1818e4 UW |
589 | sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache)); |
590 | if (sect_list) | |
591 | while (sect_list->sect_name != NULL) | |
592 | { | |
593 | if (strcmp (sect_list->sect_name, ".reg") == 0) | |
594 | get_core_register_section (regcache, sect_list->sect_name, | |
595 | 0, sect_list->human_name, 1); | |
596 | else if (strcmp (sect_list->sect_name, ".reg2") == 0) | |
597 | get_core_register_section (regcache, sect_list->sect_name, | |
598 | 2, sect_list->human_name, 0); | |
599 | else | |
600 | get_core_register_section (regcache, sect_list->sect_name, | |
601 | 3, sect_list->human_name, 0); | |
602 | ||
603 | sect_list++; | |
604 | } | |
605 | ||
606 | else | |
607 | { | |
608 | get_core_register_section (regcache, | |
609 | ".reg", 0, "general-purpose", 1); | |
610 | get_core_register_section (regcache, | |
611 | ".reg2", 2, "floating-point", 0); | |
612 | } | |
c906108c | 613 | |
ee99023e | 614 | /* Mark all registers not found in the core as unavailable. */ |
13b8769f | 615 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ee99023e | 616 | if (regcache_register_status (regcache, i) == REG_UNKNOWN) |
9c5ea4d9 | 617 | regcache_raw_supply (regcache, i, NULL); |
c906108c SS |
618 | } |
619 | ||
c906108c | 620 | static void |
fba45db2 | 621 | core_files_info (struct target_ops *t) |
c906108c | 622 | { |
07b82ea5 | 623 | print_section_info (core_data, core_bfd); |
c906108c | 624 | } |
e2544d02 | 625 | \f |
efcbbd14 UW |
626 | struct spuid_list |
627 | { | |
628 | gdb_byte *buf; | |
629 | ULONGEST offset; | |
630 | LONGEST len; | |
631 | ULONGEST pos; | |
632 | ULONGEST written; | |
633 | }; | |
634 | ||
635 | static void | |
636 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
637 | { | |
638 | struct spuid_list *list = list_p; | |
639 | enum bfd_endian byte_order | |
aff410f1 | 640 | = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
efcbbd14 UW |
641 | int fd, pos = 0; |
642 | ||
643 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
644 | if (pos == 0) | |
645 | return; | |
646 | ||
647 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
648 | { | |
649 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
650 | 4, byte_order, fd); | |
651 | list->written += 4; | |
652 | } | |
653 | list->pos += 4; | |
654 | } | |
655 | ||
9015683b TT |
656 | /* Read siginfo data from the core, if possible. Returns -1 on |
657 | failure. Otherwise, returns the number of bytes read. ABFD is the | |
658 | core file's BFD; READBUF, OFFSET, and LEN are all as specified by | |
659 | the to_xfer_partial interface. */ | |
660 | ||
661 | static LONGEST | |
662 | get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, LONGEST len) | |
663 | { | |
664 | asection *section; | |
9015683b TT |
665 | char *section_name; |
666 | const char *name = ".note.linuxcore.siginfo"; | |
667 | ||
668 | if (ptid_get_lwp (inferior_ptid)) | |
669 | section_name = xstrprintf ("%s/%ld", name, | |
670 | ptid_get_lwp (inferior_ptid)); | |
671 | else | |
672 | section_name = xstrdup (name); | |
673 | ||
674 | section = bfd_get_section_by_name (abfd, section_name); | |
675 | xfree (section_name); | |
676 | if (section == NULL) | |
677 | return -1; | |
678 | ||
679 | if (!bfd_get_section_contents (abfd, section, readbuf, offset, len)) | |
680 | return -1; | |
681 | ||
682 | return len; | |
683 | } | |
684 | ||
e2544d02 RM |
685 | static LONGEST |
686 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 | 687 | const char *annex, gdb_byte *readbuf, |
aff410f1 MS |
688 | const gdb_byte *writebuf, ULONGEST offset, |
689 | LONGEST len) | |
e2544d02 RM |
690 | { |
691 | switch (object) | |
692 | { | |
693 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
694 | return section_table_xfer_memory_partial (readbuf, writebuf, |
695 | offset, len, | |
696 | core_data->sections, | |
697 | core_data->sections_end, | |
698 | NULL); | |
e2544d02 RM |
699 | |
700 | case TARGET_OBJECT_AUXV: | |
701 | if (readbuf) | |
702 | { | |
703 | /* When the aux vector is stored in core file, BFD | |
704 | represents this with a fake section called ".auxv". */ | |
705 | ||
c4c5b7ba | 706 | struct bfd_section *section; |
e2544d02 | 707 | bfd_size_type size; |
e2544d02 RM |
708 | |
709 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
710 | if (section == NULL) | |
711 | return -1; | |
712 | ||
713 | size = bfd_section_size (core_bfd, section); | |
714 | if (offset >= size) | |
715 | return 0; | |
716 | size -= offset; | |
717 | if (size > len) | |
718 | size = len; | |
403e1656 MK |
719 | if (size > 0 |
720 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
721 | (file_ptr) offset, size)) | |
e2544d02 | 722 | { |
8a3fe4f8 | 723 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
724 | return -1; |
725 | } | |
726 | ||
727 | return size; | |
728 | } | |
729 | return -1; | |
730 | ||
403e1656 MK |
731 | case TARGET_OBJECT_WCOOKIE: |
732 | if (readbuf) | |
733 | { | |
734 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
735 | represents this with a fake section called |
736 | ".wcookie". */ | |
403e1656 MK |
737 | |
738 | struct bfd_section *section; | |
739 | bfd_size_type size; | |
403e1656 MK |
740 | |
741 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
742 | if (section == NULL) | |
743 | return -1; | |
744 | ||
745 | size = bfd_section_size (core_bfd, section); | |
746 | if (offset >= size) | |
747 | return 0; | |
748 | size -= offset; | |
749 | if (size > len) | |
750 | size = len; | |
751 | if (size > 0 | |
752 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
753 | (file_ptr) offset, size)) | |
754 | { | |
8a3fe4f8 | 755 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
756 | return -1; |
757 | } | |
758 | ||
759 | return size; | |
760 | } | |
761 | return -1; | |
762 | ||
de584861 PA |
763 | case TARGET_OBJECT_LIBRARIES: |
764 | if (core_gdbarch | |
765 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
766 | { | |
767 | if (writebuf) | |
768 | return -1; | |
769 | return | |
770 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
771 | readbuf, offset, len); | |
772 | } | |
773 | /* FALL THROUGH */ | |
774 | ||
efcbbd14 UW |
775 | case TARGET_OBJECT_SPU: |
776 | if (readbuf && annex) | |
777 | { | |
778 | /* When the SPU contexts are stored in a core file, BFD | |
aff410f1 MS |
779 | represents this with a fake section called |
780 | "SPU/<annex>". */ | |
efcbbd14 UW |
781 | |
782 | struct bfd_section *section; | |
783 | bfd_size_type size; | |
efcbbd14 | 784 | char sectionstr[100]; |
c5504eaf | 785 | |
efcbbd14 UW |
786 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
787 | ||
788 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
789 | if (section == NULL) | |
790 | return -1; | |
791 | ||
792 | size = bfd_section_size (core_bfd, section); | |
793 | if (offset >= size) | |
794 | return 0; | |
795 | size -= offset; | |
796 | if (size > len) | |
797 | size = len; | |
798 | if (size > 0 | |
799 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
800 | (file_ptr) offset, size)) | |
801 | { | |
802 | warning (_("Couldn't read SPU section in core file.")); | |
803 | return -1; | |
804 | } | |
805 | ||
806 | return size; | |
807 | } | |
808 | else if (readbuf) | |
809 | { | |
810 | /* NULL annex requests list of all present spuids. */ | |
811 | struct spuid_list list; | |
c5504eaf | 812 | |
efcbbd14 UW |
813 | list.buf = readbuf; |
814 | list.offset = offset; | |
815 | list.len = len; | |
816 | list.pos = 0; | |
817 | list.written = 0; | |
818 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
819 | return list.written; | |
820 | } | |
821 | return -1; | |
822 | ||
9015683b TT |
823 | case TARGET_OBJECT_SIGNAL_INFO: |
824 | if (readbuf) | |
825 | return get_core_siginfo (core_bfd, readbuf, offset, len); | |
826 | return -1; | |
827 | ||
e2544d02 RM |
828 | default: |
829 | if (ops->beneath != NULL) | |
aff410f1 MS |
830 | return ops->beneath->to_xfer_partial (ops->beneath, object, |
831 | annex, readbuf, | |
832 | writebuf, offset, len); | |
e2544d02 RM |
833 | return -1; |
834 | } | |
835 | } | |
836 | ||
c906108c SS |
837 | \f |
838 | /* If mourn is being called in all the right places, this could be say | |
aff410f1 MS |
839 | `gdb internal error' (since generic_mourn calls |
840 | breakpoint_init_inferior). */ | |
c906108c SS |
841 | |
842 | static int | |
a6d9a66e | 843 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
844 | { |
845 | return 0; | |
846 | } | |
847 | ||
848 | ||
849 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
850 | exactly lively, are they? On the other hand, if we don't claim | |
851 | that each & every one is alive, then we don't get any of them | |
852 | to appear in an "info thread" command, which is quite a useful | |
853 | behaviour. | |
c5aa993b | 854 | */ |
c906108c | 855 | static int |
28439f5e | 856 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
857 | { |
858 | return 1; | |
859 | } | |
860 | ||
4eb0ad19 DJ |
861 | /* Ask the current architecture what it knows about this core file. |
862 | That will be used, in turn, to pick a better architecture. This | |
863 | wrapper could be avoided if targets got a chance to specialize | |
864 | core_ops. */ | |
865 | ||
866 | static const struct target_desc * | |
867 | core_read_description (struct target_ops *target) | |
868 | { | |
a78c2d62 | 869 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
aff410f1 MS |
870 | return gdbarch_core_read_description (core_gdbarch, |
871 | target, core_bfd); | |
4eb0ad19 DJ |
872 | |
873 | return NULL; | |
874 | } | |
875 | ||
0de3b513 | 876 | static char * |
117de6a9 | 877 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
878 | { |
879 | static char buf[64]; | |
88f38a04 | 880 | struct inferior *inf; |
a5ee0f0c | 881 | int pid; |
0de3b513 | 882 | |
a5ee0f0c PA |
883 | /* The preferred way is to have a gdbarch/OS specific |
884 | implementation. */ | |
28439f5e PA |
885 | if (core_gdbarch |
886 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 887 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 888 | |
a5ee0f0c PA |
889 | /* Otherwise, if we don't have one, we'll just fallback to |
890 | "process", with normal_pid_to_str. */ | |
28439f5e | 891 | |
a5ee0f0c PA |
892 | /* Try the LWPID field first. */ |
893 | pid = ptid_get_lwp (ptid); | |
894 | if (pid != 0) | |
895 | return normal_pid_to_str (pid_to_ptid (pid)); | |
896 | ||
897 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
898 | only if it isn't a fake PID. */ | |
88f38a04 PA |
899 | inf = find_inferior_pid (ptid_get_pid (ptid)); |
900 | if (inf != NULL && !inf->fake_pid_p) | |
a5ee0f0c | 901 | return normal_pid_to_str (ptid); |
0de3b513 | 902 | |
a5ee0f0c PA |
903 | /* No luck. We simply don't have a valid PID to print. */ |
904 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
905 | return buf; |
906 | } | |
907 | ||
c35b1492 PA |
908 | static int |
909 | core_has_memory (struct target_ops *ops) | |
910 | { | |
911 | return (core_bfd != NULL); | |
912 | } | |
913 | ||
914 | static int | |
915 | core_has_stack (struct target_ops *ops) | |
916 | { | |
917 | return (core_bfd != NULL); | |
918 | } | |
919 | ||
920 | static int | |
921 | core_has_registers (struct target_ops *ops) | |
922 | { | |
923 | return (core_bfd != NULL); | |
924 | } | |
925 | ||
451b7c33 TT |
926 | /* Implement the to_info_proc method. */ |
927 | ||
928 | static void | |
929 | core_info_proc (struct target_ops *ops, char *args, enum info_proc_what request) | |
930 | { | |
931 | struct gdbarch *gdbarch = get_current_arch (); | |
932 | ||
933 | /* Since this is the core file target, call the 'core_info_proc' | |
934 | method on gdbarch, not 'info_proc'. */ | |
935 | if (gdbarch_core_info_proc_p (gdbarch)) | |
936 | gdbarch_core_info_proc (gdbarch, args, request); | |
937 | } | |
938 | ||
c906108c SS |
939 | /* Fill in core_ops with its defined operations and properties. */ |
940 | ||
941 | static void | |
fba45db2 | 942 | init_core_ops (void) |
c906108c SS |
943 | { |
944 | core_ops.to_shortname = "core"; | |
945 | core_ops.to_longname = "Local core dump file"; | |
946 | core_ops.to_doc = | |
947 | "Use a core file as a target. Specify the filename of the core file."; | |
948 | core_ops.to_open = core_open; | |
949 | core_ops.to_close = core_close; | |
950 | core_ops.to_attach = find_default_attach; | |
c906108c | 951 | core_ops.to_detach = core_detach; |
c906108c | 952 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 953 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
954 | core_ops.to_files_info = core_files_info; |
955 | core_ops.to_insert_breakpoint = ignore; | |
956 | core_ops.to_remove_breakpoint = ignore; | |
957 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 958 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 959 | core_ops.to_read_description = core_read_description; |
0de3b513 | 960 | core_ops.to_pid_to_str = core_pid_to_str; |
c0edd9ed | 961 | core_ops.to_stratum = process_stratum; |
c35b1492 PA |
962 | core_ops.to_has_memory = core_has_memory; |
963 | core_ops.to_has_stack = core_has_stack; | |
964 | core_ops.to_has_registers = core_has_registers; | |
451b7c33 | 965 | core_ops.to_info_proc = core_info_proc; |
c5aa993b | 966 | core_ops.to_magic = OPS_MAGIC; |
c0edd9ed JK |
967 | |
968 | if (core_target) | |
969 | internal_error (__FILE__, __LINE__, | |
970 | _("init_core_ops: core target already exists (\"%s\")."), | |
971 | core_target->to_longname); | |
972 | core_target = &core_ops; | |
c906108c SS |
973 | } |
974 | ||
c906108c | 975 | void |
fba45db2 | 976 | _initialize_corelow (void) |
c906108c SS |
977 | { |
978 | init_core_ops (); | |
979 | ||
28439f5e | 980 | add_target (&core_ops); |
c906108c | 981 | } |