Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
9b254dd1 | 4 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008 |
961cb7b5 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
0e24ac5d | 23 | #include "arch-utils.h" |
c906108c SS |
24 | #include "gdb_string.h" |
25 | #include <errno.h> | |
26 | #include <signal.h> | |
27 | #include <fcntl.h> | |
fc24370e MS |
28 | #ifdef HAVE_SYS_FILE_H |
29 | #include <sys/file.h> /* needed for F_OK and friends */ | |
30 | #endif | |
c5aa993b | 31 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
32 | #include "inferior.h" |
33 | #include "symtab.h" | |
34 | #include "command.h" | |
35 | #include "bfd.h" | |
36 | #include "target.h" | |
37 | #include "gdbcore.h" | |
38 | #include "gdbthread.h" | |
4e052eda | 39 | #include "regcache.h" |
0e24ac5d | 40 | #include "regset.h" |
990f9fe3 | 41 | #include "symfile.h" |
4646aa9d | 42 | #include "exec.h" |
dbda9972 | 43 | #include "readline/readline.h" |
0e24ac5d | 44 | #include "gdb_assert.h" |
60250e8b | 45 | #include "exceptions.h" |
a77053c2 | 46 | #include "solib.h" |
f90c07ac | 47 | #include "filenames.h" |
0e24ac5d | 48 | |
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 | ||
2acceee2 JM |
60 | /* The core_fns for a core file handler that is prepared to read the core |
61 | file currently open on core_bfd. */ | |
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 | ||
a14ed312 | 70 | static void core_files_info (struct target_ops *); |
c906108c | 71 | |
a14ed312 | 72 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 73 | |
020cc13c | 74 | static int gdb_check_format (bfd *); |
2acceee2 | 75 | |
a14ed312 | 76 | static void core_open (char *, int); |
c906108c | 77 | |
a14ed312 | 78 | static void core_detach (char *, int); |
c906108c | 79 | |
a14ed312 | 80 | static void core_close (int); |
c906108c | 81 | |
74b7792f AC |
82 | static void core_close_cleanup (void *ignore); |
83 | ||
56be3814 | 84 | static void get_core_registers (struct regcache *, int); |
c906108c | 85 | |
4efb68b1 | 86 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 87 | |
39f77062 | 88 | static int core_file_thread_alive (ptid_t tid); |
c906108c | 89 | |
a14ed312 | 90 | static void init_core_ops (void); |
c906108c | 91 | |
a14ed312 | 92 | void _initialize_corelow (void); |
c906108c SS |
93 | |
94 | struct target_ops core_ops; | |
95 | ||
7f9f62ba PA |
96 | /* An arbitrary identifier for the core inferior. */ |
97 | #define CORELOW_PID 1 | |
98 | ||
c906108c SS |
99 | /* Link a new core_fns into the global core_file_fns list. Called on gdb |
100 | startup by the _initialize routine in each core file register reader, to | |
101 | register information about each format the the reader is prepared to | |
102 | handle. */ | |
103 | ||
104 | void | |
00e32a35 | 105 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 106 | { |
c5aa993b | 107 | cf->next = core_file_fns; |
c906108c SS |
108 | core_file_fns = cf; |
109 | } | |
110 | ||
2acceee2 JM |
111 | /* The default function that core file handlers can use to examine a |
112 | core file BFD and decide whether or not to accept the job of | |
113 | reading the core file. */ | |
114 | ||
115 | int | |
fba45db2 | 116 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
117 | { |
118 | int result; | |
119 | ||
120 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
121 | return (result); | |
122 | } | |
123 | ||
124 | /* Walk through the list of core functions to find a set that can | |
125 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 126 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
127 | selected. */ |
128 | ||
129 | static struct core_fns * | |
fba45db2 | 130 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
131 | { |
132 | struct core_fns *cf; | |
133 | struct core_fns *yummy = NULL; | |
134 | int matches = 0;; | |
135 | ||
0e24ac5d MK |
136 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
137 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
138 | return NULL; | |
139 | ||
2acceee2 JM |
140 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
141 | { | |
142 | if (cf->core_sniffer (cf, abfd)) | |
143 | { | |
144 | yummy = cf; | |
145 | matches++; | |
146 | } | |
147 | } | |
148 | if (matches > 1) | |
149 | { | |
8a3fe4f8 | 150 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
151 | bfd_get_filename (abfd), matches); |
152 | } | |
153 | else if (matches == 0) | |
154 | { | |
8a3fe4f8 | 155 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
156 | bfd_get_filename (abfd)); |
157 | } | |
158 | if (yummy == NULL) | |
159 | { | |
160 | yummy = core_file_fns; | |
161 | } | |
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 | |
167 | core file handler that recognizes it. */ | |
168 | ||
169 | int | |
fba45db2 | 170 | default_check_format (bfd *abfd) |
2acceee2 JM |
171 | { |
172 | return (0); | |
173 | } | |
174 | ||
175 | /* Attempt to recognize core file formats that BFD rejects. */ | |
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 SS |
191 | |
192 | /* Discard all vestiges of any previous core file and mark data and stack | |
193 | spaces as empty. */ | |
194 | ||
c906108c | 195 | static void |
fba45db2 | 196 | core_close (int quitting) |
c906108c SS |
197 | { |
198 | char *name; | |
199 | ||
200 | if (core_bfd) | |
201 | { | |
39f77062 | 202 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
7f9f62ba | 203 | delete_inferior_silent (CORELOW_PID); |
c906108c | 204 | |
7a292a7a | 205 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 206 | comments in clear_solib in solib.c. */ |
a77053c2 | 207 | clear_solib (); |
7a292a7a | 208 | |
c906108c SS |
209 | name = bfd_get_filename (core_bfd); |
210 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 211 | warning (_("cannot close \"%s\": %s"), |
c906108c | 212 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 213 | xfree (name); |
c906108c | 214 | core_bfd = NULL; |
c906108c SS |
215 | if (core_ops.to_sections) |
216 | { | |
b8c9b27d | 217 | xfree (core_ops.to_sections); |
c906108c SS |
218 | core_ops.to_sections = NULL; |
219 | core_ops.to_sections_end = NULL; | |
220 | } | |
221 | } | |
2acceee2 | 222 | core_vec = NULL; |
0e24ac5d | 223 | core_gdbarch = NULL; |
c906108c SS |
224 | } |
225 | ||
74b7792f AC |
226 | static void |
227 | core_close_cleanup (void *ignore) | |
228 | { | |
229 | core_close (0/*ignored*/); | |
230 | } | |
231 | ||
c906108c SS |
232 | /* Look for sections whose names start with `.reg/' so that we can extract the |
233 | list of threads in a core file. */ | |
234 | ||
235 | static void | |
4efb68b1 | 236 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 237 | { |
0de3b513 | 238 | ptid_t ptid; |
c906108c SS |
239 | int thread_id; |
240 | asection *reg_sect = (asection *) reg_sect_arg; | |
241 | ||
242 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
243 | return; | |
244 | ||
245 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
246 | ||
0de3b513 PA |
247 | ptid = ptid_build (ptid_get_pid (inferior_ptid), thread_id, 0); |
248 | ||
249 | if (ptid_get_lwp (inferior_ptid) == 0) | |
250 | /* The main thread has already been added before getting here, and | |
251 | this is the first time we hear about a thread id. Assume this | |
252 | is the main thread. */ | |
253 | thread_change_ptid (inferior_ptid, ptid); | |
254 | else | |
255 | /* Nope, really a new thread. */ | |
256 | add_thread (ptid); | |
c906108c SS |
257 | |
258 | /* Warning, Will Robinson, looking at BFD private data! */ | |
259 | ||
260 | if (reg_sect != NULL | |
c5aa993b | 261 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
0de3b513 | 262 | inferior_ptid = ptid; /* Yes, make it current */ |
c906108c SS |
263 | } |
264 | ||
265 | /* This routine opens and sets up the core file bfd. */ | |
266 | ||
267 | static void | |
fba45db2 | 268 | core_open (char *filename, int from_tty) |
c906108c SS |
269 | { |
270 | const char *p; | |
271 | int siggy; | |
272 | struct cleanup *old_chain; | |
273 | char *temp; | |
274 | bfd *temp_bfd; | |
c906108c | 275 | int scratch_chan; |
ee28ca0f | 276 | int flags; |
7f9f62ba | 277 | int corelow_pid = CORELOW_PID; |
c906108c SS |
278 | |
279 | target_preopen (from_tty); | |
280 | if (!filename) | |
281 | { | |
8a3fe4f8 AC |
282 | if (core_bfd) |
283 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
284 | else | |
285 | error (_("No core file specified.")); | |
c906108c SS |
286 | } |
287 | ||
288 | filename = tilde_expand (filename); | |
f90c07ac | 289 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 290 | { |
1754f103 | 291 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 292 | xfree (filename); |
c906108c SS |
293 | filename = temp; |
294 | } | |
295 | ||
b8c9b27d | 296 | old_chain = make_cleanup (xfree, filename); |
c906108c | 297 | |
ee28ca0f AC |
298 | flags = O_BINARY | O_LARGEFILE; |
299 | if (write_files) | |
300 | flags |= O_RDWR; | |
301 | else | |
302 | flags |= O_RDONLY; | |
303 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
304 | if (scratch_chan < 0) |
305 | perror_with_name (filename); | |
306 | ||
9f76c2cd MM |
307 | temp_bfd = bfd_fopen (filename, gnutarget, |
308 | write_files ? FOPEN_RUB : FOPEN_RB, | |
309 | scratch_chan); | |
c906108c SS |
310 | if (temp_bfd == NULL) |
311 | perror_with_name (filename); | |
312 | ||
2acceee2 JM |
313 | if (!bfd_check_format (temp_bfd, bfd_core) && |
314 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
315 | { |
316 | /* Do it after the err msg */ | |
317 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
318 | on error it does not free all the storage associated with the |
319 | bfd). */ | |
5c65bbb6 | 320 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 321 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
322 | filename, bfd_errmsg (bfd_get_error ())); |
323 | } | |
324 | ||
325 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
326 | ||
c5aa993b | 327 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
328 | unpush_target (&core_ops); |
329 | core_bfd = temp_bfd; | |
74b7792f | 330 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 331 | |
0e24ac5d MK |
332 | /* FIXME: kettenis/20031023: This is very dangerous. The |
333 | CORE_GDBARCH that results from this call may very well be | |
334 | different from CURRENT_GDBARCH. However, its methods may only | |
335 | work if it is selected as the current architecture, because they | |
336 | rely on swapped data (see gdbarch.c). We should get rid of that | |
337 | swapped data. */ | |
338 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
339 | ||
2acceee2 JM |
340 | /* Find a suitable core file handler to munch on core_bfd */ |
341 | core_vec = sniff_core_bfd (core_bfd); | |
342 | ||
c906108c SS |
343 | validate_files (); |
344 | ||
345 | /* Find the data section */ | |
346 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
347 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 348 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
349 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
350 | ||
2f1b5984 MK |
351 | /* If we have no exec file, try to set the architecture from the |
352 | core file. We don't do this unconditionally since an exec file | |
353 | typically contains more information that helps us determine the | |
354 | architecture than a core file. */ | |
355 | if (!exec_bfd) | |
356 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 357 | |
87ab71f0 | 358 | push_target (&core_ops); |
c906108c SS |
359 | discard_cleanups (old_chain); |
360 | ||
7f9f62ba PA |
361 | add_inferior_silent (corelow_pid); |
362 | ||
0de3b513 PA |
363 | /* Do this before acknowledging the inferior, so if |
364 | post_create_inferior throws (can happen easilly if you're loading | |
365 | a core file with the wrong exec), we aren't left with threads | |
366 | from the previous inferior. */ | |
367 | init_thread_list (); | |
368 | ||
369 | /* Set INFERIOR_PTID early, so an upper layer can rely on it being | |
370 | set while in the target_find_new_threads call below. */ | |
371 | inferior_ptid = pid_to_ptid (corelow_pid); | |
372 | ||
373 | /* Assume ST --- Add a main task. We'll later detect when we go | |
374 | from ST to MT. */ | |
375 | add_thread_silent (inferior_ptid); | |
376 | ||
20d2ca3e AC |
377 | /* This is done first, before anything has a chance to query the |
378 | inferior for information such as symbols. */ | |
9353355f | 379 | post_create_inferior (&core_ops, from_tty); |
20d2ca3e | 380 | |
0de3b513 PA |
381 | /* Build up thread list from BFD sections, and possibly set the |
382 | current thread to the .reg/NN section matching the .reg | |
383 | section. */ | |
384 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
385 | bfd_get_section_by_name (core_bfd, ".reg")); | |
386 | ||
387 | /* Now go through the target stack looking for threads since there | |
388 | may be a thread_stratum target loaded on top of target core by | |
389 | now. The layer above should claim threads found in the BFD | |
390 | sections. */ | |
391 | target_find_new_threads (); | |
392 | ||
c906108c SS |
393 | p = bfd_core_file_failing_command (core_bfd); |
394 | if (p) | |
a3f17187 | 395 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
396 | |
397 | siggy = bfd_core_file_failing_signal (core_bfd); | |
398 | if (siggy > 0) | |
8e6a3c35 | 399 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 400 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
401 | value is called ``target_signal'' and this function got the |
402 | name ..._from_host(). */ | |
a3f17187 | 403 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
1cded358 AR |
404 | target_signal_to_string ( |
405 | gdbarch_target_signal_from_host (core_gdbarch, siggy))); | |
c906108c | 406 | |
87ab71f0 PA |
407 | /* Fetch all registers from core file. */ |
408 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 409 | |
87ab71f0 PA |
410 | /* Now, set up the frame cache, and print the top of stack. */ |
411 | reinit_frame_cache (); | |
412 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
413 | } |
414 | ||
415 | static void | |
fba45db2 | 416 | core_detach (char *args, int from_tty) |
c906108c SS |
417 | { |
418 | if (args) | |
8a3fe4f8 | 419 | error (_("Too many arguments")); |
c906108c SS |
420 | unpush_target (&core_ops); |
421 | reinit_frame_cache (); | |
422 | if (from_tty) | |
a3f17187 | 423 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
424 | } |
425 | ||
de57eccd JM |
426 | |
427 | /* Try to retrieve registers from a section in core_bfd, and supply | |
428 | them to core_vec->core_read_registers, as the register set numbered | |
429 | WHICH. | |
430 | ||
0de3b513 PA |
431 | If inferior_ptid's lwp member is zero, do the single-threaded |
432 | thing: look for a section named NAME. If inferior_ptid's lwp | |
433 | member is non-zero, do the multi-threaded thing: look for a section | |
434 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
435 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
436 | |
437 | HUMAN_NAME is a human-readable name for the kind of registers the | |
438 | NAME section contains, for use in error messages. | |
439 | ||
440 | If REQUIRED is non-zero, print an error if the core file doesn't | |
441 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
442 | ||
443 | static void | |
9eefc95f UW |
444 | get_core_register_section (struct regcache *regcache, |
445 | char *name, | |
de57eccd JM |
446 | int which, |
447 | char *human_name, | |
448 | int required) | |
449 | { | |
3ecda457 | 450 | static char *section_name = NULL; |
7be0c536 | 451 | struct bfd_section *section; |
de57eccd JM |
452 | bfd_size_type size; |
453 | char *contents; | |
454 | ||
3ecda457 | 455 | xfree (section_name); |
0de3b513 PA |
456 | if (ptid_get_lwp (inferior_ptid)) |
457 | section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid)); | |
de57eccd | 458 | else |
3ecda457 | 459 | section_name = xstrdup (name); |
de57eccd JM |
460 | |
461 | section = bfd_get_section_by_name (core_bfd, section_name); | |
462 | if (! section) | |
463 | { | |
464 | if (required) | |
8a3fe4f8 | 465 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
466 | return; |
467 | } | |
468 | ||
469 | size = bfd_section_size (core_bfd, section); | |
470 | contents = alloca (size); | |
471 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
472 | (file_ptr) 0, size)) | |
473 | { | |
8a3fe4f8 | 474 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
475 | human_name, name); |
476 | return; | |
477 | } | |
478 | ||
0e24ac5d MK |
479 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
480 | { | |
481 | const struct regset *regset; | |
482 | ||
483 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
484 | if (regset == NULL) | |
485 | { | |
486 | if (required) | |
8a3fe4f8 | 487 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
488 | human_name); |
489 | return; | |
490 | } | |
491 | ||
9eefc95f | 492 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
493 | return; |
494 | } | |
495 | ||
496 | gdb_assert (core_vec); | |
9eefc95f | 497 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
498 | ((CORE_ADDR) |
499 | bfd_section_vma (core_bfd, section))); | |
500 | } | |
501 | ||
502 | ||
c906108c SS |
503 | /* Get the registers out of a core file. This is the machine- |
504 | independent part. Fetch_core_registers is the machine-dependent | |
505 | part, typically implemented in the xm-file for each architecture. */ | |
506 | ||
507 | /* We just get all the registers, so we don't use regno. */ | |
508 | ||
c906108c | 509 | static void |
56be3814 | 510 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 511 | { |
9c5ea4d9 | 512 | int i; |
c906108c | 513 | |
0e24ac5d MK |
514 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
515 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
516 | { |
517 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 518 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
519 | return; |
520 | } | |
521 | ||
56be3814 | 522 | get_core_register_section (regcache, |
9eefc95f | 523 | ".reg", 0, "general-purpose", 1); |
56be3814 | 524 | get_core_register_section (regcache, |
9eefc95f | 525 | ".reg2", 2, "floating-point", 0); |
56be3814 | 526 | get_core_register_section (regcache, |
9eefc95f | 527 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
528 | get_core_register_section (regcache, |
529 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
604c2f83 LM |
530 | get_core_register_section (regcache, |
531 | ".reg-ppc-vsx", 4, "POWER7 VSX", 0); | |
c906108c | 532 | |
9c5ea4d9 | 533 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 534 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
535 | if (!regcache_valid_p (regcache, i)) |
536 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
537 | } |
538 | ||
c906108c | 539 | static void |
fba45db2 | 540 | core_files_info (struct target_ops *t) |
c906108c SS |
541 | { |
542 | print_section_info (t, core_bfd); | |
543 | } | |
e2544d02 RM |
544 | \f |
545 | static LONGEST | |
546 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
547 | const char *annex, gdb_byte *readbuf, |
548 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
549 | { |
550 | switch (object) | |
551 | { | |
552 | case TARGET_OBJECT_MEMORY: | |
553 | if (readbuf) | |
7160c4c3 | 554 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
662fb31b | 555 | len, 0/*read*/, NULL, ops); |
e2544d02 | 556 | if (writebuf) |
7160c4c3 PA |
557 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
558 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
559 | return -1; |
560 | ||
561 | case TARGET_OBJECT_AUXV: | |
562 | if (readbuf) | |
563 | { | |
564 | /* When the aux vector is stored in core file, BFD | |
565 | represents this with a fake section called ".auxv". */ | |
566 | ||
c4c5b7ba | 567 | struct bfd_section *section; |
e2544d02 RM |
568 | bfd_size_type size; |
569 | char *contents; | |
570 | ||
571 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
572 | if (section == NULL) | |
573 | return -1; | |
574 | ||
575 | size = bfd_section_size (core_bfd, section); | |
576 | if (offset >= size) | |
577 | return 0; | |
578 | size -= offset; | |
579 | if (size > len) | |
580 | size = len; | |
403e1656 MK |
581 | if (size > 0 |
582 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
583 | (file_ptr) offset, size)) | |
e2544d02 | 584 | { |
8a3fe4f8 | 585 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
586 | return -1; |
587 | } | |
588 | ||
589 | return size; | |
590 | } | |
591 | return -1; | |
592 | ||
403e1656 MK |
593 | case TARGET_OBJECT_WCOOKIE: |
594 | if (readbuf) | |
595 | { | |
596 | /* When the StackGhost cookie is stored in core file, BFD | |
597 | represents this with a fake section called ".wcookie". */ | |
598 | ||
599 | struct bfd_section *section; | |
600 | bfd_size_type size; | |
601 | char *contents; | |
602 | ||
603 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
604 | if (section == NULL) | |
605 | return -1; | |
606 | ||
607 | size = bfd_section_size (core_bfd, section); | |
608 | if (offset >= size) | |
609 | return 0; | |
610 | size -= offset; | |
611 | if (size > len) | |
612 | size = len; | |
613 | if (size > 0 | |
614 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
615 | (file_ptr) offset, size)) | |
616 | { | |
8a3fe4f8 | 617 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
618 | return -1; |
619 | } | |
620 | ||
621 | return size; | |
622 | } | |
623 | return -1; | |
624 | ||
de584861 PA |
625 | case TARGET_OBJECT_LIBRARIES: |
626 | if (core_gdbarch | |
627 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
628 | { | |
629 | if (writebuf) | |
630 | return -1; | |
631 | return | |
632 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
633 | readbuf, offset, len); | |
634 | } | |
635 | /* FALL THROUGH */ | |
636 | ||
e2544d02 RM |
637 | default: |
638 | if (ops->beneath != NULL) | |
639 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
640 | readbuf, writebuf, offset, len); | |
641 | return -1; | |
642 | } | |
643 | } | |
644 | ||
c906108c SS |
645 | \f |
646 | /* If mourn is being called in all the right places, this could be say | |
647 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
648 | ||
649 | static int | |
8181d85f | 650 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
651 | { |
652 | return 0; | |
653 | } | |
654 | ||
655 | ||
656 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
657 | exactly lively, are they? On the other hand, if we don't claim | |
658 | that each & every one is alive, then we don't get any of them | |
659 | to appear in an "info thread" command, which is quite a useful | |
660 | behaviour. | |
c5aa993b | 661 | */ |
c906108c | 662 | static int |
39f77062 | 663 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
664 | { |
665 | return 1; | |
666 | } | |
667 | ||
4eb0ad19 DJ |
668 | /* Ask the current architecture what it knows about this core file. |
669 | That will be used, in turn, to pick a better architecture. This | |
670 | wrapper could be avoided if targets got a chance to specialize | |
671 | core_ops. */ | |
672 | ||
673 | static const struct target_desc * | |
674 | core_read_description (struct target_ops *target) | |
675 | { | |
676 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
677 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
678 | ||
679 | return NULL; | |
680 | } | |
681 | ||
0de3b513 PA |
682 | static char * |
683 | core_pid_to_str (ptid_t ptid) | |
684 | { | |
685 | static char buf[64]; | |
686 | ||
687 | if (ptid_get_lwp (ptid) == 0) | |
688 | xsnprintf (buf, sizeof buf, "<main task>"); | |
689 | else | |
690 | xsnprintf (buf, sizeof buf, "Thread %ld", ptid_get_lwp (ptid)); | |
691 | ||
692 | return buf; | |
693 | } | |
694 | ||
c906108c SS |
695 | /* Fill in core_ops with its defined operations and properties. */ |
696 | ||
697 | static void | |
fba45db2 | 698 | init_core_ops (void) |
c906108c SS |
699 | { |
700 | core_ops.to_shortname = "core"; | |
701 | core_ops.to_longname = "Local core dump file"; | |
702 | core_ops.to_doc = | |
703 | "Use a core file as a target. Specify the filename of the core file."; | |
704 | core_ops.to_open = core_open; | |
705 | core_ops.to_close = core_close; | |
706 | core_ops.to_attach = find_default_attach; | |
c906108c | 707 | core_ops.to_detach = core_detach; |
c906108c | 708 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 709 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 710 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
711 | core_ops.to_files_info = core_files_info; |
712 | core_ops.to_insert_breakpoint = ignore; | |
713 | core_ops.to_remove_breakpoint = ignore; | |
714 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 715 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 716 | core_ops.to_read_description = core_read_description; |
0de3b513 | 717 | core_ops.to_pid_to_str = core_pid_to_str; |
c906108c SS |
718 | core_ops.to_stratum = core_stratum; |
719 | core_ops.to_has_memory = 1; | |
720 | core_ops.to_has_stack = 1; | |
721 | core_ops.to_has_registers = 1; | |
c5aa993b | 722 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
723 | } |
724 | ||
725 | /* non-zero if we should not do the add_target call in | |
726 | _initialize_corelow; not initialized (i.e., bss) so that | |
727 | the target can initialize it (i.e., data) if appropriate. | |
728 | This needs to be set at compile time because we don't know | |
729 | for sure whether the target's initialize routine is called | |
730 | before us or after us. */ | |
731 | int coreops_suppress_target; | |
732 | ||
733 | void | |
fba45db2 | 734 | _initialize_corelow (void) |
c906108c SS |
735 | { |
736 | init_core_ops (); | |
737 | ||
738 | if (!coreops_suppress_target) | |
739 | add_target (&core_ops); | |
740 | } |