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" |
9852c492 | 49 | #include "completer.h" |
8e860359 | 50 | |
ee28ca0f AC |
51 | #ifndef O_LARGEFILE |
52 | #define O_LARGEFILE 0 | |
53 | #endif | |
54 | ||
00e32a35 AC |
55 | /* List of all available core_fns. On gdb startup, each core file |
56 | register reader calls deprecated_add_core_fns() to register | |
57 | information on each core format it is prepared to read. */ | |
c906108c SS |
58 | |
59 | static struct core_fns *core_file_fns = NULL; | |
60 | ||
aff410f1 MS |
61 | /* The core_fns for a core file handler that is prepared to read the |
62 | core file currently open on core_bfd. */ | |
2acceee2 JM |
63 | |
64 | static struct core_fns *core_vec = NULL; | |
65 | ||
0e24ac5d MK |
66 | /* FIXME: kettenis/20031023: Eventually this variable should |
67 | disappear. */ | |
68 | ||
69 | struct gdbarch *core_gdbarch = NULL; | |
70 | ||
07b82ea5 PA |
71 | /* Per-core data. Currently, only the section table. Note that these |
72 | target sections are *not* mapped in the current address spaces' set | |
73 | of target sections --- those should come only from pure executable | |
74 | or shared library bfds. The core bfd sections are an | |
75 | implementation detail of the core target, just like ptrace is for | |
76 | unix child targets. */ | |
77 | static struct target_section_table *core_data; | |
78 | ||
a14ed312 | 79 | static void core_files_info (struct target_ops *); |
c906108c | 80 | |
a14ed312 | 81 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 82 | |
020cc13c | 83 | static int gdb_check_format (bfd *); |
2acceee2 | 84 | |
a14ed312 | 85 | static void core_open (char *, int); |
c906108c | 86 | |
136d6dae | 87 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 88 | |
460014f5 | 89 | static void core_close (void); |
c906108c | 90 | |
74b7792f AC |
91 | static void core_close_cleanup (void *ignore); |
92 | ||
4efb68b1 | 93 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 94 | |
a14ed312 | 95 | static void init_core_ops (void); |
c906108c | 96 | |
a14ed312 | 97 | void _initialize_corelow (void); |
c906108c | 98 | |
c0edd9ed | 99 | static struct target_ops core_ops; |
c906108c | 100 | |
7f9f62ba PA |
101 | /* An arbitrary identifier for the core inferior. */ |
102 | #define CORELOW_PID 1 | |
103 | ||
aff410f1 MS |
104 | /* Link a new core_fns into the global core_file_fns list. Called on |
105 | gdb startup by the _initialize routine in each core file register | |
b021a221 | 106 | reader, to register information about each format the reader is |
aff410f1 | 107 | prepared to handle. */ |
c906108c SS |
108 | |
109 | void | |
00e32a35 | 110 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 111 | { |
c5aa993b | 112 | cf->next = core_file_fns; |
c906108c SS |
113 | core_file_fns = cf; |
114 | } | |
115 | ||
2acceee2 JM |
116 | /* The default function that core file handlers can use to examine a |
117 | core file BFD and decide whether or not to accept the job of | |
aff410f1 | 118 | reading the core file. */ |
2acceee2 JM |
119 | |
120 | int | |
fba45db2 | 121 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
122 | { |
123 | int result; | |
124 | ||
125 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
126 | return (result); | |
127 | } | |
128 | ||
129 | /* Walk through the list of core functions to find a set that can | |
06b9f45f | 130 | handle the core file open on ABFD. Returns pointer to set that is |
aff410f1 | 131 | selected. */ |
2acceee2 JM |
132 | |
133 | static struct core_fns * | |
fba45db2 | 134 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
135 | { |
136 | struct core_fns *cf; | |
137 | struct core_fns *yummy = NULL; | |
138 | int matches = 0;; | |
139 | ||
aff410f1 MS |
140 | /* Don't sniff if we have support for register sets in |
141 | CORE_GDBARCH. */ | |
0e24ac5d MK |
142 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
143 | return NULL; | |
144 | ||
2acceee2 JM |
145 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
146 | { | |
147 | if (cf->core_sniffer (cf, abfd)) | |
148 | { | |
149 | yummy = cf; | |
150 | matches++; | |
151 | } | |
152 | } | |
153 | if (matches > 1) | |
154 | { | |
8a3fe4f8 | 155 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
156 | bfd_get_filename (abfd), matches); |
157 | } | |
158 | else if (matches == 0) | |
06b9f45f JK |
159 | error (_("\"%s\": no core file handler recognizes format"), |
160 | bfd_get_filename (abfd)); | |
161 | ||
2acceee2 JM |
162 | return (yummy); |
163 | } | |
164 | ||
165 | /* The default is to reject every core file format we see. Either | |
166 | BFD has to recognize it, or we have to provide a function in the | |
aff410f1 | 167 | core file handler that recognizes it. */ |
2acceee2 JM |
168 | |
169 | int | |
fba45db2 | 170 | default_check_format (bfd *abfd) |
2acceee2 JM |
171 | { |
172 | return (0); | |
173 | } | |
174 | ||
aff410f1 | 175 | /* Attempt to recognize core file formats that BFD rejects. */ |
2acceee2 | 176 | |
020cc13c | 177 | static int |
fba45db2 | 178 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
179 | { |
180 | struct core_fns *cf; | |
181 | ||
182 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
183 | { | |
184 | if (cf->check_format (abfd)) | |
185 | { | |
81a9a963 | 186 | return (1); |
2acceee2 JM |
187 | } |
188 | } | |
81a9a963 | 189 | return (0); |
2acceee2 | 190 | } |
c906108c | 191 | |
aff410f1 MS |
192 | /* Discard all vestiges of any previous core file and mark data and |
193 | stack spaces as empty. */ | |
c906108c | 194 | |
c906108c | 195 | static void |
460014f5 | 196 | core_close (void) |
c906108c | 197 | { |
c906108c SS |
198 | if (core_bfd) |
199 | { | |
959b8724 | 200 | int pid = ptid_get_pid (inferior_ptid); |
aff410f1 MS |
201 | inferior_ptid = null_ptid; /* Avoid confusion from thread |
202 | stuff. */ | |
06b9f45f JK |
203 | if (pid != 0) |
204 | exit_inferior_silent (pid); | |
c906108c | 205 | |
aff410f1 MS |
206 | /* Clear out solib state while the bfd is still open. See |
207 | comments in clear_solib in solib.c. */ | |
a77053c2 | 208 | clear_solib (); |
7a292a7a | 209 | |
06b9f45f JK |
210 | if (core_data) |
211 | { | |
212 | xfree (core_data->sections); | |
213 | xfree (core_data); | |
214 | core_data = NULL; | |
215 | } | |
07b82ea5 | 216 | |
cbb099e8 | 217 | gdb_bfd_unref (core_bfd); |
c906108c | 218 | core_bfd = NULL; |
c906108c | 219 | } |
2acceee2 | 220 | core_vec = NULL; |
0e24ac5d | 221 | core_gdbarch = NULL; |
c906108c SS |
222 | } |
223 | ||
74b7792f AC |
224 | static void |
225 | core_close_cleanup (void *ignore) | |
226 | { | |
460014f5 | 227 | core_close (); |
74b7792f AC |
228 | } |
229 | ||
aff410f1 MS |
230 | /* Look for sections whose names start with `.reg/' so that we can |
231 | extract the list of threads in a core file. */ | |
c906108c SS |
232 | |
233 | static void | |
4efb68b1 | 234 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 235 | { |
0de3b513 | 236 | ptid_t ptid; |
3cdd9356 PA |
237 | int core_tid; |
238 | int pid, lwpid; | |
c906108c | 239 | asection *reg_sect = (asection *) reg_sect_arg; |
88f38a04 PA |
240 | int fake_pid_p = 0; |
241 | struct inferior *inf; | |
c906108c SS |
242 | |
243 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
244 | return; | |
245 | ||
3cdd9356 | 246 | core_tid = atoi (bfd_section_name (abfd, asect) + 5); |
c906108c | 247 | |
261b8d08 PA |
248 | pid = bfd_core_file_pid (core_bfd); |
249 | if (pid == 0) | |
3cdd9356 | 250 | { |
88f38a04 | 251 | fake_pid_p = 1; |
3cdd9356 | 252 | pid = CORELOW_PID; |
3cdd9356 | 253 | } |
0de3b513 | 254 | |
261b8d08 PA |
255 | lwpid = core_tid; |
256 | ||
88f38a04 PA |
257 | inf = current_inferior (); |
258 | if (inf->pid == 0) | |
259 | { | |
260 | inferior_appeared (inf, pid); | |
261 | inf->fake_pid_p = fake_pid_p; | |
262 | } | |
3cdd9356 PA |
263 | |
264 | ptid = ptid_build (pid, lwpid, 0); | |
265 | ||
266 | add_thread (ptid); | |
c906108c SS |
267 | |
268 | /* Warning, Will Robinson, looking at BFD private data! */ | |
269 | ||
270 | if (reg_sect != NULL | |
aff410f1 MS |
271 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
272 | inferior_ptid = ptid; /* Yes, make it current. */ | |
c906108c SS |
273 | } |
274 | ||
275 | /* This routine opens and sets up the core file bfd. */ | |
276 | ||
277 | static void | |
fba45db2 | 278 | core_open (char *filename, int from_tty) |
c906108c SS |
279 | { |
280 | const char *p; | |
281 | int siggy; | |
282 | struct cleanup *old_chain; | |
283 | char *temp; | |
284 | bfd *temp_bfd; | |
c906108c | 285 | int scratch_chan; |
ee28ca0f | 286 | int flags; |
8e7b59a5 | 287 | volatile struct gdb_exception except; |
c906108c SS |
288 | |
289 | target_preopen (from_tty); | |
290 | if (!filename) | |
291 | { | |
8a3fe4f8 | 292 | if (core_bfd) |
3e43a32a MS |
293 | error (_("No core file specified. (Use `detach' " |
294 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
295 | else |
296 | error (_("No core file specified.")); | |
c906108c SS |
297 | } |
298 | ||
299 | filename = tilde_expand (filename); | |
aff410f1 | 300 | if (!IS_ABSOLUTE_PATH (filename)) |
c906108c | 301 | { |
aff410f1 MS |
302 | temp = concat (current_directory, "/", |
303 | filename, (char *) NULL); | |
b8c9b27d | 304 | xfree (filename); |
c906108c SS |
305 | filename = temp; |
306 | } | |
307 | ||
b8c9b27d | 308 | old_chain = make_cleanup (xfree, filename); |
c906108c | 309 | |
ee28ca0f AC |
310 | flags = O_BINARY | O_LARGEFILE; |
311 | if (write_files) | |
312 | flags |= O_RDWR; | |
313 | else | |
314 | flags |= O_RDONLY; | |
315 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
316 | if (scratch_chan < 0) |
317 | perror_with_name (filename); | |
318 | ||
64c31149 TT |
319 | temp_bfd = gdb_bfd_fopen (filename, gnutarget, |
320 | write_files ? FOPEN_RUB : FOPEN_RB, | |
321 | scratch_chan); | |
c906108c SS |
322 | if (temp_bfd == NULL) |
323 | perror_with_name (filename); | |
324 | ||
5aafa1cc PM |
325 | if (!bfd_check_format (temp_bfd, bfd_core) |
326 | && !gdb_check_format (temp_bfd)) | |
c906108c SS |
327 | { |
328 | /* Do it after the err msg */ | |
aff410f1 MS |
329 | /* FIXME: should be checking for errors from bfd_close (for one |
330 | thing, on error it does not free all the storage associated | |
331 | with the bfd). */ | |
f9a062ff | 332 | make_cleanup_bfd_unref (temp_bfd); |
8a3fe4f8 | 333 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
334 | filename, bfd_errmsg (bfd_get_error ())); |
335 | } | |
336 | ||
aff410f1 MS |
337 | /* Looks semi-reasonable. Toss the old core file and work on the |
338 | new. */ | |
c906108c | 339 | |
a4453b7e | 340 | do_cleanups (old_chain); |
c906108c SS |
341 | unpush_target (&core_ops); |
342 | core_bfd = temp_bfd; | |
74b7792f | 343 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 344 | |
0e24ac5d MK |
345 | core_gdbarch = gdbarch_from_bfd (core_bfd); |
346 | ||
2acceee2 JM |
347 | /* Find a suitable core file handler to munch on core_bfd */ |
348 | core_vec = sniff_core_bfd (core_bfd); | |
349 | ||
c906108c SS |
350 | validate_files (); |
351 | ||
07b82ea5 PA |
352 | core_data = XZALLOC (struct target_section_table); |
353 | ||
c906108c | 354 | /* Find the data section */ |
07b82ea5 | 355 | if (build_section_table (core_bfd, |
aff410f1 MS |
356 | &core_data->sections, |
357 | &core_data->sections_end)) | |
8a3fe4f8 | 358 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
359 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
360 | ||
2f1b5984 MK |
361 | /* If we have no exec file, try to set the architecture from the |
362 | core file. We don't do this unconditionally since an exec file | |
363 | typically contains more information that helps us determine the | |
364 | architecture than a core file. */ | |
365 | if (!exec_bfd) | |
366 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 367 | |
87ab71f0 | 368 | push_target (&core_ops); |
c906108c SS |
369 | discard_cleanups (old_chain); |
370 | ||
0de3b513 PA |
371 | /* Do this before acknowledging the inferior, so if |
372 | post_create_inferior throws (can happen easilly if you're loading | |
373 | a core file with the wrong exec), we aren't left with threads | |
374 | from the previous inferior. */ | |
375 | init_thread_list (); | |
376 | ||
3cdd9356 | 377 | inferior_ptid = null_ptid; |
0de3b513 | 378 | |
739fc47a PA |
379 | /* Need to flush the register cache (and the frame cache) from a |
380 | previous debug session. If inferior_ptid ends up the same as the | |
381 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
382 | core2; core core1; core core2 --- then there's potential for | |
383 | get_current_regcache to return the cached regcache of the | |
384 | previous session, and the frame cache being stale. */ | |
385 | registers_changed (); | |
386 | ||
0de3b513 PA |
387 | /* Build up thread list from BFD sections, and possibly set the |
388 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 389 | section. */ |
0de3b513 PA |
390 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
391 | bfd_get_section_by_name (core_bfd, ".reg")); | |
392 | ||
3cdd9356 PA |
393 | if (ptid_equal (inferior_ptid, null_ptid)) |
394 | { | |
395 | /* Either we found no .reg/NN section, and hence we have a | |
396 | non-threaded core (single-threaded, from gdb's perspective), | |
397 | or for some reason add_to_thread_list couldn't determine | |
398 | which was the "main" thread. The latter case shouldn't | |
399 | usually happen, but we're dealing with input here, which can | |
400 | always be broken in different ways. */ | |
401 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 402 | |
3cdd9356 PA |
403 | if (thread == NULL) |
404 | { | |
c45ceae0 | 405 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
406 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
407 | add_thread_silent (inferior_ptid); | |
408 | } | |
409 | else | |
410 | switch_to_thread (thread->ptid); | |
411 | } | |
412 | ||
959b8724 PA |
413 | post_create_inferior (&core_ops, from_tty); |
414 | ||
0de3b513 PA |
415 | /* Now go through the target stack looking for threads since there |
416 | may be a thread_stratum target loaded on top of target core by | |
417 | now. The layer above should claim threads found in the BFD | |
418 | sections. */ | |
8e7b59a5 KS |
419 | TRY_CATCH (except, RETURN_MASK_ERROR) |
420 | { | |
421 | target_find_new_threads (); | |
422 | } | |
423 | ||
424 | if (except.reason < 0) | |
425 | exception_print (gdb_stderr, except); | |
0de3b513 | 426 | |
c906108c SS |
427 | p = bfd_core_file_failing_command (core_bfd); |
428 | if (p) | |
a3f17187 | 429 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
430 | |
431 | siggy = bfd_core_file_failing_signal (core_bfd); | |
432 | if (siggy > 0) | |
423ec54c | 433 | { |
22203bbf | 434 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
435 | core (map gdb_signal from host signals). If we do have |
436 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
437 | implementation for that gdbarch, as a fallback measure, | |
438 | assume the host signal mapping. It'll be correct for native | |
439 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 440 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
441 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
442 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
443 | siggy) | |
444 | : gdb_signal_from_host (siggy)); | |
423ec54c | 445 | |
aff410f1 | 446 | printf_filtered (_("Program terminated with signal %d, %s.\n"), |
2ea28649 | 447 | siggy, gdb_signal_to_string (sig)); |
423ec54c | 448 | } |
c906108c | 449 | |
87ab71f0 PA |
450 | /* Fetch all registers from core file. */ |
451 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 452 | |
87ab71f0 PA |
453 | /* Now, set up the frame cache, and print the top of stack. */ |
454 | reinit_frame_cache (); | |
455 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
456 | } |
457 | ||
458 | static void | |
136d6dae | 459 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
460 | { |
461 | if (args) | |
8a3fe4f8 | 462 | error (_("Too many arguments")); |
136d6dae | 463 | unpush_target (ops); |
c906108c SS |
464 | reinit_frame_cache (); |
465 | if (from_tty) | |
a3f17187 | 466 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
467 | } |
468 | ||
07b82ea5 PA |
469 | #ifdef DEPRECATED_IBM6000_TARGET |
470 | ||
471 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
472 | pointer into the first new slot. This will not be necessary when | |
473 | the rs6000 target is converted to use the standard solib | |
474 | framework. */ | |
475 | ||
476 | struct target_section * | |
477 | deprecated_core_resize_section_table (int num_added) | |
478 | { | |
479 | int old_count; | |
480 | ||
481 | old_count = resize_section_table (core_data, num_added); | |
482 | return core_data->sections + old_count; | |
483 | } | |
484 | ||
485 | #endif | |
de57eccd JM |
486 | |
487 | /* Try to retrieve registers from a section in core_bfd, and supply | |
488 | them to core_vec->core_read_registers, as the register set numbered | |
489 | WHICH. | |
490 | ||
0de3b513 PA |
491 | If inferior_ptid's lwp member is zero, do the single-threaded |
492 | thing: look for a section named NAME. If inferior_ptid's lwp | |
493 | member is non-zero, do the multi-threaded thing: look for a section | |
494 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
495 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
496 | |
497 | HUMAN_NAME is a human-readable name for the kind of registers the | |
498 | NAME section contains, for use in error messages. | |
499 | ||
500 | If REQUIRED is non-zero, print an error if the core file doesn't | |
aff410f1 MS |
501 | have a section by the appropriate name. Otherwise, just do |
502 | nothing. */ | |
de57eccd JM |
503 | |
504 | static void | |
9eefc95f | 505 | get_core_register_section (struct regcache *regcache, |
1b1818e4 | 506 | const char *name, |
de57eccd | 507 | int which, |
1b1818e4 | 508 | const char *human_name, |
de57eccd JM |
509 | int required) |
510 | { | |
3ecda457 | 511 | static char *section_name = NULL; |
7be0c536 | 512 | struct bfd_section *section; |
de57eccd JM |
513 | bfd_size_type size; |
514 | char *contents; | |
515 | ||
3ecda457 | 516 | xfree (section_name); |
959b8724 | 517 | |
261b8d08 | 518 | if (ptid_get_lwp (inferior_ptid)) |
aff410f1 MS |
519 | section_name = xstrprintf ("%s/%ld", name, |
520 | ptid_get_lwp (inferior_ptid)); | |
de57eccd | 521 | else |
3ecda457 | 522 | section_name = xstrdup (name); |
de57eccd JM |
523 | |
524 | section = bfd_get_section_by_name (core_bfd, section_name); | |
525 | if (! section) | |
526 | { | |
527 | if (required) | |
aff410f1 MS |
528 | warning (_("Couldn't find %s registers in core file."), |
529 | human_name); | |
de57eccd JM |
530 | return; |
531 | } | |
532 | ||
533 | size = bfd_section_size (core_bfd, section); | |
534 | contents = alloca (size); | |
535 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
536 | (file_ptr) 0, size)) | |
537 | { | |
8a3fe4f8 | 538 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
539 | human_name, name); |
540 | return; | |
541 | } | |
542 | ||
0e24ac5d MK |
543 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
544 | { | |
545 | const struct regset *regset; | |
546 | ||
aff410f1 MS |
547 | regset = gdbarch_regset_from_core_section (core_gdbarch, |
548 | name, size); | |
0e24ac5d MK |
549 | if (regset == NULL) |
550 | { | |
551 | if (required) | |
8a3fe4f8 | 552 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
553 | human_name); |
554 | return; | |
555 | } | |
556 | ||
9eefc95f | 557 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
558 | return; |
559 | } | |
560 | ||
561 | gdb_assert (core_vec); | |
9eefc95f | 562 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
563 | ((CORE_ADDR) |
564 | bfd_section_vma (core_bfd, section))); | |
565 | } | |
566 | ||
567 | ||
c906108c SS |
568 | /* Get the registers out of a core file. This is the machine- |
569 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
570 | part, typically implemented in the xm-file for each |
571 | architecture. */ | |
c906108c SS |
572 | |
573 | /* We just get all the registers, so we don't use regno. */ | |
574 | ||
c906108c | 575 | static void |
28439f5e PA |
576 | get_core_registers (struct target_ops *ops, |
577 | struct regcache *regcache, int regno) | |
c906108c | 578 | { |
1b1818e4 | 579 | struct core_regset_section *sect_list; |
9c5ea4d9 | 580 | int i; |
c906108c | 581 | |
0e24ac5d MK |
582 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
583 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
584 | { |
585 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 586 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
587 | return; |
588 | } | |
589 | ||
1b1818e4 UW |
590 | sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache)); |
591 | if (sect_list) | |
592 | while (sect_list->sect_name != NULL) | |
593 | { | |
594 | if (strcmp (sect_list->sect_name, ".reg") == 0) | |
595 | get_core_register_section (regcache, sect_list->sect_name, | |
596 | 0, sect_list->human_name, 1); | |
597 | else if (strcmp (sect_list->sect_name, ".reg2") == 0) | |
598 | get_core_register_section (regcache, sect_list->sect_name, | |
599 | 2, sect_list->human_name, 0); | |
600 | else | |
601 | get_core_register_section (regcache, sect_list->sect_name, | |
602 | 3, sect_list->human_name, 0); | |
603 | ||
604 | sect_list++; | |
605 | } | |
606 | ||
607 | else | |
608 | { | |
609 | get_core_register_section (regcache, | |
610 | ".reg", 0, "general-purpose", 1); | |
611 | get_core_register_section (regcache, | |
612 | ".reg2", 2, "floating-point", 0); | |
613 | } | |
c906108c | 614 | |
ee99023e | 615 | /* Mark all registers not found in the core as unavailable. */ |
13b8769f | 616 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ee99023e | 617 | if (regcache_register_status (regcache, i) == REG_UNKNOWN) |
9c5ea4d9 | 618 | regcache_raw_supply (regcache, i, NULL); |
c906108c SS |
619 | } |
620 | ||
c906108c | 621 | static void |
fba45db2 | 622 | core_files_info (struct target_ops *t) |
c906108c | 623 | { |
07b82ea5 | 624 | print_section_info (core_data, core_bfd); |
c906108c | 625 | } |
e2544d02 | 626 | \f |
efcbbd14 UW |
627 | struct spuid_list |
628 | { | |
629 | gdb_byte *buf; | |
630 | ULONGEST offset; | |
631 | LONGEST len; | |
632 | ULONGEST pos; | |
633 | ULONGEST written; | |
634 | }; | |
635 | ||
636 | static void | |
637 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
638 | { | |
639 | struct spuid_list *list = list_p; | |
640 | enum bfd_endian byte_order | |
aff410f1 | 641 | = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
efcbbd14 UW |
642 | int fd, pos = 0; |
643 | ||
644 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
645 | if (pos == 0) | |
646 | return; | |
647 | ||
648 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
649 | { | |
650 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
651 | 4, byte_order, fd); | |
652 | list->written += 4; | |
653 | } | |
654 | list->pos += 4; | |
655 | } | |
656 | ||
9015683b TT |
657 | /* Read siginfo data from the core, if possible. Returns -1 on |
658 | failure. Otherwise, returns the number of bytes read. ABFD is the | |
659 | core file's BFD; READBUF, OFFSET, and LEN are all as specified by | |
660 | the to_xfer_partial interface. */ | |
661 | ||
662 | static LONGEST | |
663 | get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, LONGEST len) | |
664 | { | |
665 | asection *section; | |
9015683b TT |
666 | char *section_name; |
667 | const char *name = ".note.linuxcore.siginfo"; | |
668 | ||
669 | if (ptid_get_lwp (inferior_ptid)) | |
670 | section_name = xstrprintf ("%s/%ld", name, | |
671 | ptid_get_lwp (inferior_ptid)); | |
672 | else | |
673 | section_name = xstrdup (name); | |
674 | ||
675 | section = bfd_get_section_by_name (abfd, section_name); | |
676 | xfree (section_name); | |
677 | if (section == NULL) | |
678 | return -1; | |
679 | ||
680 | if (!bfd_get_section_contents (abfd, section, readbuf, offset, len)) | |
681 | return -1; | |
682 | ||
683 | return len; | |
684 | } | |
685 | ||
e2544d02 RM |
686 | static LONGEST |
687 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 | 688 | const char *annex, gdb_byte *readbuf, |
aff410f1 MS |
689 | const gdb_byte *writebuf, ULONGEST offset, |
690 | LONGEST len) | |
e2544d02 RM |
691 | { |
692 | switch (object) | |
693 | { | |
694 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
695 | return section_table_xfer_memory_partial (readbuf, writebuf, |
696 | offset, len, | |
697 | core_data->sections, | |
698 | core_data->sections_end, | |
699 | NULL); | |
e2544d02 RM |
700 | |
701 | case TARGET_OBJECT_AUXV: | |
702 | if (readbuf) | |
703 | { | |
704 | /* When the aux vector is stored in core file, BFD | |
705 | represents this with a fake section called ".auxv". */ | |
706 | ||
c4c5b7ba | 707 | struct bfd_section *section; |
e2544d02 | 708 | bfd_size_type size; |
e2544d02 RM |
709 | |
710 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
711 | if (section == NULL) | |
712 | return -1; | |
713 | ||
714 | size = bfd_section_size (core_bfd, section); | |
715 | if (offset >= size) | |
716 | return 0; | |
717 | size -= offset; | |
718 | if (size > len) | |
719 | size = len; | |
403e1656 MK |
720 | if (size > 0 |
721 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
722 | (file_ptr) offset, size)) | |
e2544d02 | 723 | { |
8a3fe4f8 | 724 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
725 | return -1; |
726 | } | |
727 | ||
728 | return size; | |
729 | } | |
730 | return -1; | |
731 | ||
403e1656 MK |
732 | case TARGET_OBJECT_WCOOKIE: |
733 | if (readbuf) | |
734 | { | |
735 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
736 | represents this with a fake section called |
737 | ".wcookie". */ | |
403e1656 MK |
738 | |
739 | struct bfd_section *section; | |
740 | bfd_size_type size; | |
403e1656 MK |
741 | |
742 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
743 | if (section == NULL) | |
744 | return -1; | |
745 | ||
746 | size = bfd_section_size (core_bfd, section); | |
747 | if (offset >= size) | |
748 | return 0; | |
749 | size -= offset; | |
750 | if (size > len) | |
751 | size = len; | |
752 | if (size > 0 | |
753 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
754 | (file_ptr) offset, size)) | |
755 | { | |
8a3fe4f8 | 756 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
757 | return -1; |
758 | } | |
759 | ||
760 | return size; | |
761 | } | |
762 | return -1; | |
763 | ||
de584861 PA |
764 | case TARGET_OBJECT_LIBRARIES: |
765 | if (core_gdbarch | |
766 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
767 | { | |
768 | if (writebuf) | |
769 | return -1; | |
770 | return | |
771 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
772 | readbuf, offset, len); | |
773 | } | |
774 | /* FALL THROUGH */ | |
775 | ||
efcbbd14 UW |
776 | case TARGET_OBJECT_SPU: |
777 | if (readbuf && annex) | |
778 | { | |
779 | /* When the SPU contexts are stored in a core file, BFD | |
aff410f1 MS |
780 | represents this with a fake section called |
781 | "SPU/<annex>". */ | |
efcbbd14 UW |
782 | |
783 | struct bfd_section *section; | |
784 | bfd_size_type size; | |
efcbbd14 | 785 | char sectionstr[100]; |
c5504eaf | 786 | |
efcbbd14 UW |
787 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
788 | ||
789 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
790 | if (section == NULL) | |
791 | return -1; | |
792 | ||
793 | size = bfd_section_size (core_bfd, section); | |
794 | if (offset >= size) | |
795 | return 0; | |
796 | size -= offset; | |
797 | if (size > len) | |
798 | size = len; | |
799 | if (size > 0 | |
800 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
801 | (file_ptr) offset, size)) | |
802 | { | |
803 | warning (_("Couldn't read SPU section in core file.")); | |
804 | return -1; | |
805 | } | |
806 | ||
807 | return size; | |
808 | } | |
809 | else if (readbuf) | |
810 | { | |
811 | /* NULL annex requests list of all present spuids. */ | |
812 | struct spuid_list list; | |
c5504eaf | 813 | |
efcbbd14 UW |
814 | list.buf = readbuf; |
815 | list.offset = offset; | |
816 | list.len = len; | |
817 | list.pos = 0; | |
818 | list.written = 0; | |
819 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
820 | return list.written; | |
821 | } | |
822 | return -1; | |
823 | ||
9015683b TT |
824 | case TARGET_OBJECT_SIGNAL_INFO: |
825 | if (readbuf) | |
826 | return get_core_siginfo (core_bfd, readbuf, offset, len); | |
827 | return -1; | |
828 | ||
e2544d02 RM |
829 | default: |
830 | if (ops->beneath != NULL) | |
aff410f1 MS |
831 | return ops->beneath->to_xfer_partial (ops->beneath, object, |
832 | annex, readbuf, | |
833 | writebuf, offset, len); | |
e2544d02 RM |
834 | return -1; |
835 | } | |
836 | } | |
837 | ||
c906108c SS |
838 | \f |
839 | /* If mourn is being called in all the right places, this could be say | |
aff410f1 MS |
840 | `gdb internal error' (since generic_mourn calls |
841 | breakpoint_init_inferior). */ | |
c906108c SS |
842 | |
843 | static int | |
a6d9a66e | 844 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
845 | { |
846 | return 0; | |
847 | } | |
848 | ||
849 | ||
850 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
851 | exactly lively, are they? On the other hand, if we don't claim | |
852 | that each & every one is alive, then we don't get any of them | |
853 | to appear in an "info thread" command, which is quite a useful | |
854 | behaviour. | |
c5aa993b | 855 | */ |
c906108c | 856 | static int |
28439f5e | 857 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
858 | { |
859 | return 1; | |
860 | } | |
861 | ||
4eb0ad19 DJ |
862 | /* Ask the current architecture what it knows about this core file. |
863 | That will be used, in turn, to pick a better architecture. This | |
864 | wrapper could be avoided if targets got a chance to specialize | |
865 | core_ops. */ | |
866 | ||
867 | static const struct target_desc * | |
868 | core_read_description (struct target_ops *target) | |
869 | { | |
a78c2d62 | 870 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
aff410f1 MS |
871 | return gdbarch_core_read_description (core_gdbarch, |
872 | target, core_bfd); | |
4eb0ad19 DJ |
873 | |
874 | return NULL; | |
875 | } | |
876 | ||
0de3b513 | 877 | static char * |
117de6a9 | 878 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
879 | { |
880 | static char buf[64]; | |
88f38a04 | 881 | struct inferior *inf; |
a5ee0f0c | 882 | int pid; |
0de3b513 | 883 | |
a5ee0f0c PA |
884 | /* The preferred way is to have a gdbarch/OS specific |
885 | implementation. */ | |
28439f5e PA |
886 | if (core_gdbarch |
887 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 888 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 889 | |
a5ee0f0c PA |
890 | /* Otherwise, if we don't have one, we'll just fallback to |
891 | "process", with normal_pid_to_str. */ | |
28439f5e | 892 | |
a5ee0f0c PA |
893 | /* Try the LWPID field first. */ |
894 | pid = ptid_get_lwp (ptid); | |
895 | if (pid != 0) | |
896 | return normal_pid_to_str (pid_to_ptid (pid)); | |
897 | ||
898 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
899 | only if it isn't a fake PID. */ | |
88f38a04 PA |
900 | inf = find_inferior_pid (ptid_get_pid (ptid)); |
901 | if (inf != NULL && !inf->fake_pid_p) | |
a5ee0f0c | 902 | return normal_pid_to_str (ptid); |
0de3b513 | 903 | |
a5ee0f0c PA |
904 | /* No luck. We simply don't have a valid PID to print. */ |
905 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
906 | return buf; |
907 | } | |
908 | ||
c35b1492 PA |
909 | static int |
910 | core_has_memory (struct target_ops *ops) | |
911 | { | |
912 | return (core_bfd != NULL); | |
913 | } | |
914 | ||
915 | static int | |
916 | core_has_stack (struct target_ops *ops) | |
917 | { | |
918 | return (core_bfd != NULL); | |
919 | } | |
920 | ||
921 | static int | |
922 | core_has_registers (struct target_ops *ops) | |
923 | { | |
924 | return (core_bfd != NULL); | |
925 | } | |
926 | ||
451b7c33 TT |
927 | /* Implement the to_info_proc method. */ |
928 | ||
929 | static void | |
930 | core_info_proc (struct target_ops *ops, char *args, enum info_proc_what request) | |
931 | { | |
932 | struct gdbarch *gdbarch = get_current_arch (); | |
933 | ||
934 | /* Since this is the core file target, call the 'core_info_proc' | |
935 | method on gdbarch, not 'info_proc'. */ | |
936 | if (gdbarch_core_info_proc_p (gdbarch)) | |
937 | gdbarch_core_info_proc (gdbarch, args, request); | |
938 | } | |
939 | ||
c906108c SS |
940 | /* Fill in core_ops with its defined operations and properties. */ |
941 | ||
942 | static void | |
fba45db2 | 943 | init_core_ops (void) |
c906108c SS |
944 | { |
945 | core_ops.to_shortname = "core"; | |
946 | core_ops.to_longname = "Local core dump file"; | |
947 | core_ops.to_doc = | |
948 | "Use a core file as a target. Specify the filename of the core file."; | |
949 | core_ops.to_open = core_open; | |
950 | core_ops.to_close = core_close; | |
951 | core_ops.to_attach = find_default_attach; | |
c906108c | 952 | core_ops.to_detach = core_detach; |
c906108c | 953 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 954 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
955 | core_ops.to_files_info = core_files_info; |
956 | core_ops.to_insert_breakpoint = ignore; | |
957 | core_ops.to_remove_breakpoint = ignore; | |
958 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 959 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 960 | core_ops.to_read_description = core_read_description; |
0de3b513 | 961 | core_ops.to_pid_to_str = core_pid_to_str; |
c0edd9ed | 962 | core_ops.to_stratum = process_stratum; |
c35b1492 PA |
963 | core_ops.to_has_memory = core_has_memory; |
964 | core_ops.to_has_stack = core_has_stack; | |
965 | core_ops.to_has_registers = core_has_registers; | |
451b7c33 | 966 | core_ops.to_info_proc = core_info_proc; |
c5aa993b | 967 | core_ops.to_magic = OPS_MAGIC; |
c0edd9ed JK |
968 | |
969 | if (core_target) | |
970 | internal_error (__FILE__, __LINE__, | |
971 | _("init_core_ops: core target already exists (\"%s\")."), | |
972 | core_target->to_longname); | |
973 | core_target = &core_ops; | |
c906108c SS |
974 | } |
975 | ||
c906108c | 976 | void |
fba45db2 | 977 | _initialize_corelow (void) |
c906108c SS |
978 | { |
979 | init_core_ops (); | |
980 | ||
9852c492 | 981 | add_target_with_completer (&core_ops, filename_completer); |
c906108c | 982 | } |