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, |
4c38e0a4 | 4 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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" |
6c95b8df | 48 | #include "progspace.h" |
516ba659 | 49 | #include "objfiles.h" |
0e24ac5d | 50 | |
8e860359 | 51 | |
ee28ca0f AC |
52 | #ifndef O_LARGEFILE |
53 | #define O_LARGEFILE 0 | |
54 | #endif | |
55 | ||
00e32a35 AC |
56 | /* List of all available core_fns. On gdb startup, each core file |
57 | register reader calls deprecated_add_core_fns() to register | |
58 | information on each core format it is prepared to read. */ | |
c906108c SS |
59 | |
60 | static struct core_fns *core_file_fns = NULL; | |
61 | ||
2acceee2 JM |
62 | /* The core_fns for a core file handler that is prepared to read the core |
63 | file currently open on core_bfd. */ | |
64 | ||
65 | static struct core_fns *core_vec = NULL; | |
66 | ||
0e24ac5d MK |
67 | /* FIXME: kettenis/20031023: Eventually this variable should |
68 | disappear. */ | |
69 | ||
70 | struct gdbarch *core_gdbarch = NULL; | |
71 | ||
07b82ea5 PA |
72 | /* Per-core data. Currently, only the section table. Note that these |
73 | target sections are *not* mapped in the current address spaces' set | |
74 | of target sections --- those should come only from pure executable | |
75 | or shared library bfds. The core bfd sections are an | |
76 | implementation detail of the core target, just like ptrace is for | |
77 | unix child targets. */ | |
78 | static struct target_section_table *core_data; | |
79 | ||
3cdd9356 PA |
80 | /* True if we needed to fake the pid of the loaded core inferior. */ |
81 | static int core_has_fake_pid = 0; | |
82 | ||
a14ed312 | 83 | static void core_files_info (struct target_ops *); |
c906108c | 84 | |
a14ed312 | 85 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 86 | |
020cc13c | 87 | static int gdb_check_format (bfd *); |
2acceee2 | 88 | |
a14ed312 | 89 | static void core_open (char *, int); |
c906108c | 90 | |
136d6dae | 91 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 92 | |
a14ed312 | 93 | static void core_close (int); |
c906108c | 94 | |
74b7792f AC |
95 | static void core_close_cleanup (void *ignore); |
96 | ||
4efb68b1 | 97 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 98 | |
a14ed312 | 99 | static void init_core_ops (void); |
c906108c | 100 | |
a14ed312 | 101 | void _initialize_corelow (void); |
c906108c | 102 | |
c0edd9ed | 103 | static struct target_ops core_ops; |
c906108c | 104 | |
7f9f62ba PA |
105 | /* An arbitrary identifier for the core inferior. */ |
106 | #define CORELOW_PID 1 | |
107 | ||
c906108c SS |
108 | /* Link a new core_fns into the global core_file_fns list. Called on gdb |
109 | startup by the _initialize routine in each core file register reader, to | |
110 | register information about each format the the reader is prepared to | |
111 | handle. */ | |
112 | ||
113 | void | |
00e32a35 | 114 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 115 | { |
c5aa993b | 116 | cf->next = core_file_fns; |
c906108c SS |
117 | core_file_fns = cf; |
118 | } | |
119 | ||
2acceee2 JM |
120 | /* The default function that core file handlers can use to examine a |
121 | core file BFD and decide whether or not to accept the job of | |
122 | reading the core file. */ | |
123 | ||
124 | int | |
fba45db2 | 125 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
126 | { |
127 | int result; | |
128 | ||
129 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
130 | return (result); | |
131 | } | |
132 | ||
133 | /* Walk through the list of core functions to find a set that can | |
134 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 135 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
136 | selected. */ |
137 | ||
138 | static struct core_fns * | |
fba45db2 | 139 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
140 | { |
141 | struct core_fns *cf; | |
142 | struct core_fns *yummy = NULL; | |
143 | int matches = 0;; | |
144 | ||
0e24ac5d MK |
145 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
146 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
147 | return NULL; | |
148 | ||
2acceee2 JM |
149 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
150 | { | |
151 | if (cf->core_sniffer (cf, abfd)) | |
152 | { | |
153 | yummy = cf; | |
154 | matches++; | |
155 | } | |
156 | } | |
157 | if (matches > 1) | |
158 | { | |
8a3fe4f8 | 159 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
160 | bfd_get_filename (abfd), matches); |
161 | } | |
162 | else if (matches == 0) | |
163 | { | |
8a3fe4f8 | 164 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
165 | bfd_get_filename (abfd)); |
166 | } | |
167 | if (yummy == NULL) | |
168 | { | |
169 | yummy = core_file_fns; | |
170 | } | |
171 | return (yummy); | |
172 | } | |
173 | ||
174 | /* The default is to reject every core file format we see. Either | |
175 | BFD has to recognize it, or we have to provide a function in the | |
176 | core file handler that recognizes it. */ | |
177 | ||
178 | int | |
fba45db2 | 179 | default_check_format (bfd *abfd) |
2acceee2 JM |
180 | { |
181 | return (0); | |
182 | } | |
183 | ||
184 | /* Attempt to recognize core file formats that BFD rejects. */ | |
185 | ||
020cc13c | 186 | static int |
fba45db2 | 187 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
188 | { |
189 | struct core_fns *cf; | |
190 | ||
191 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
192 | { | |
193 | if (cf->check_format (abfd)) | |
194 | { | |
81a9a963 | 195 | return (1); |
2acceee2 JM |
196 | } |
197 | } | |
81a9a963 | 198 | return (0); |
2acceee2 | 199 | } |
c906108c SS |
200 | |
201 | /* Discard all vestiges of any previous core file and mark data and stack | |
202 | spaces as empty. */ | |
203 | ||
c906108c | 204 | static void |
fba45db2 | 205 | core_close (int quitting) |
c906108c SS |
206 | { |
207 | char *name; | |
208 | ||
209 | if (core_bfd) | |
210 | { | |
959b8724 | 211 | int pid = ptid_get_pid (inferior_ptid); |
39f77062 | 212 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
6c95b8df | 213 | exit_inferior_silent (pid); |
c906108c | 214 | |
7a292a7a | 215 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 216 | comments in clear_solib in solib.c. */ |
a77053c2 | 217 | clear_solib (); |
7a292a7a | 218 | |
07b82ea5 PA |
219 | xfree (core_data->sections); |
220 | xfree (core_data); | |
221 | core_data = NULL; | |
3cdd9356 | 222 | core_has_fake_pid = 0; |
07b82ea5 | 223 | |
c906108c | 224 | name = bfd_get_filename (core_bfd); |
516ba659 | 225 | gdb_bfd_close_or_warn (core_bfd); |
b8c9b27d | 226 | xfree (name); |
c906108c | 227 | core_bfd = NULL; |
c906108c | 228 | } |
2acceee2 | 229 | core_vec = NULL; |
0e24ac5d | 230 | core_gdbarch = NULL; |
c906108c SS |
231 | } |
232 | ||
74b7792f AC |
233 | static void |
234 | core_close_cleanup (void *ignore) | |
235 | { | |
236 | core_close (0/*ignored*/); | |
237 | } | |
238 | ||
c906108c SS |
239 | /* Look for sections whose names start with `.reg/' so that we can extract the |
240 | list of threads in a core file. */ | |
241 | ||
242 | static void | |
4efb68b1 | 243 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 244 | { |
0de3b513 | 245 | ptid_t ptid; |
3cdd9356 PA |
246 | int core_tid; |
247 | int pid, lwpid; | |
c906108c SS |
248 | asection *reg_sect = (asection *) reg_sect_arg; |
249 | ||
250 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
251 | return; | |
252 | ||
3cdd9356 | 253 | core_tid = atoi (bfd_section_name (abfd, asect) + 5); |
c906108c | 254 | |
261b8d08 PA |
255 | pid = bfd_core_file_pid (core_bfd); |
256 | if (pid == 0) | |
3cdd9356 PA |
257 | { |
258 | core_has_fake_pid = 1; | |
259 | pid = CORELOW_PID; | |
3cdd9356 | 260 | } |
0de3b513 | 261 | |
261b8d08 PA |
262 | lwpid = core_tid; |
263 | ||
6c95b8df PA |
264 | if (current_inferior ()->pid == 0) |
265 | inferior_appeared (current_inferior (), pid); | |
3cdd9356 PA |
266 | |
267 | ptid = ptid_build (pid, lwpid, 0); | |
268 | ||
269 | add_thread (ptid); | |
c906108c SS |
270 | |
271 | /* Warning, Will Robinson, looking at BFD private data! */ | |
272 | ||
273 | if (reg_sect != NULL | |
c5aa993b | 274 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
0de3b513 | 275 | inferior_ptid = ptid; /* Yes, make it current */ |
c906108c SS |
276 | } |
277 | ||
278 | /* This routine opens and sets up the core file bfd. */ | |
279 | ||
280 | static void | |
fba45db2 | 281 | core_open (char *filename, int from_tty) |
c906108c SS |
282 | { |
283 | const char *p; | |
284 | int siggy; | |
285 | struct cleanup *old_chain; | |
286 | char *temp; | |
287 | bfd *temp_bfd; | |
c906108c | 288 | int scratch_chan; |
ee28ca0f | 289 | int flags; |
c906108c SS |
290 | |
291 | target_preopen (from_tty); | |
292 | if (!filename) | |
293 | { | |
8a3fe4f8 AC |
294 | if (core_bfd) |
295 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
296 | else | |
297 | error (_("No core file specified.")); | |
c906108c SS |
298 | } |
299 | ||
300 | filename = tilde_expand (filename); | |
f90c07ac | 301 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 302 | { |
1754f103 | 303 | temp = concat (current_directory, "/", 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 | ||
9f76c2cd MM |
319 | temp_bfd = 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 */ | |
329 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
330 | on error it does not free all the storage associated with the |
331 | bfd). */ | |
5c65bbb6 | 332 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 333 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
334 | filename, bfd_errmsg (bfd_get_error ())); |
335 | } | |
336 | ||
337 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
338 | ||
c5aa993b | 339 | discard_cleanups (old_chain); /* Don't free filename any more */ |
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 | /* FIXME: kettenis/20031023: This is very dangerous. The |
345 | CORE_GDBARCH that results from this call may very well be | |
346 | different from CURRENT_GDBARCH. However, its methods may only | |
347 | work if it is selected as the current architecture, because they | |
348 | rely on swapped data (see gdbarch.c). We should get rid of that | |
349 | swapped data. */ | |
350 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
351 | ||
2acceee2 JM |
352 | /* Find a suitable core file handler to munch on core_bfd */ |
353 | core_vec = sniff_core_bfd (core_bfd); | |
354 | ||
c906108c SS |
355 | validate_files (); |
356 | ||
07b82ea5 PA |
357 | core_data = XZALLOC (struct target_section_table); |
358 | ||
c906108c | 359 | /* Find the data section */ |
07b82ea5 PA |
360 | if (build_section_table (core_bfd, |
361 | &core_data->sections, &core_data->sections_end)) | |
8a3fe4f8 | 362 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
363 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
364 | ||
2f1b5984 MK |
365 | /* If we have no exec file, try to set the architecture from the |
366 | core file. We don't do this unconditionally since an exec file | |
367 | typically contains more information that helps us determine the | |
368 | architecture than a core file. */ | |
369 | if (!exec_bfd) | |
370 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 371 | |
87ab71f0 | 372 | push_target (&core_ops); |
c906108c SS |
373 | discard_cleanups (old_chain); |
374 | ||
0de3b513 PA |
375 | /* Do this before acknowledging the inferior, so if |
376 | post_create_inferior throws (can happen easilly if you're loading | |
377 | a core file with the wrong exec), we aren't left with threads | |
378 | from the previous inferior. */ | |
379 | init_thread_list (); | |
380 | ||
3cdd9356 PA |
381 | inferior_ptid = null_ptid; |
382 | core_has_fake_pid = 0; | |
0de3b513 | 383 | |
739fc47a PA |
384 | /* Need to flush the register cache (and the frame cache) from a |
385 | previous debug session. If inferior_ptid ends up the same as the | |
386 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
387 | core2; core core1; core core2 --- then there's potential for | |
388 | get_current_regcache to return the cached regcache of the | |
389 | previous session, and the frame cache being stale. */ | |
390 | registers_changed (); | |
391 | ||
0de3b513 PA |
392 | /* Build up thread list from BFD sections, and possibly set the |
393 | current thread to the .reg/NN section matching the .reg | |
394 | section. */ | |
395 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
396 | bfd_get_section_by_name (core_bfd, ".reg")); | |
397 | ||
3cdd9356 PA |
398 | if (ptid_equal (inferior_ptid, null_ptid)) |
399 | { | |
400 | /* Either we found no .reg/NN section, and hence we have a | |
401 | non-threaded core (single-threaded, from gdb's perspective), | |
402 | or for some reason add_to_thread_list couldn't determine | |
403 | which was the "main" thread. The latter case shouldn't | |
404 | usually happen, but we're dealing with input here, which can | |
405 | always be broken in different ways. */ | |
406 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 407 | |
3cdd9356 PA |
408 | if (thread == NULL) |
409 | { | |
c45ceae0 | 410 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
411 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
412 | add_thread_silent (inferior_ptid); | |
413 | } | |
414 | else | |
415 | switch_to_thread (thread->ptid); | |
416 | } | |
417 | ||
959b8724 PA |
418 | post_create_inferior (&core_ops, from_tty); |
419 | ||
0de3b513 PA |
420 | /* Now go through the target stack looking for threads since there |
421 | may be a thread_stratum target loaded on top of target core by | |
422 | now. The layer above should claim threads found in the BFD | |
423 | sections. */ | |
424 | target_find_new_threads (); | |
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 JK |
432 | { |
433 | /* NOTE: target_signal_from_host() converts a target signal value | |
434 | into gdb's internal signal value. Unfortunately gdb's internal | |
435 | value is called ``target_signal'' and this function got the | |
436 | name ..._from_host(). */ | |
437 | enum target_signal sig = (core_gdbarch != NULL | |
438 | ? gdbarch_target_signal_from_host (core_gdbarch, siggy) | |
439 | : target_signal_from_host (siggy)); | |
440 | ||
441 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, | |
442 | target_signal_to_string (sig)); | |
443 | } | |
c906108c | 444 | |
87ab71f0 PA |
445 | /* Fetch all registers from core file. */ |
446 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 447 | |
87ab71f0 PA |
448 | /* Now, set up the frame cache, and print the top of stack. */ |
449 | reinit_frame_cache (); | |
450 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
451 | } |
452 | ||
453 | static void | |
136d6dae | 454 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
455 | { |
456 | if (args) | |
8a3fe4f8 | 457 | error (_("Too many arguments")); |
136d6dae | 458 | unpush_target (ops); |
c906108c SS |
459 | reinit_frame_cache (); |
460 | if (from_tty) | |
a3f17187 | 461 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
462 | } |
463 | ||
07b82ea5 PA |
464 | #ifdef DEPRECATED_IBM6000_TARGET |
465 | ||
466 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
467 | pointer into the first new slot. This will not be necessary when | |
468 | the rs6000 target is converted to use the standard solib | |
469 | framework. */ | |
470 | ||
471 | struct target_section * | |
472 | deprecated_core_resize_section_table (int num_added) | |
473 | { | |
474 | int old_count; | |
475 | ||
476 | old_count = resize_section_table (core_data, num_added); | |
477 | return core_data->sections + old_count; | |
478 | } | |
479 | ||
480 | #endif | |
de57eccd JM |
481 | |
482 | /* Try to retrieve registers from a section in core_bfd, and supply | |
483 | them to core_vec->core_read_registers, as the register set numbered | |
484 | WHICH. | |
485 | ||
0de3b513 PA |
486 | If inferior_ptid's lwp member is zero, do the single-threaded |
487 | thing: look for a section named NAME. If inferior_ptid's lwp | |
488 | member is non-zero, do the multi-threaded thing: look for a section | |
489 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
490 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
491 | |
492 | HUMAN_NAME is a human-readable name for the kind of registers the | |
493 | NAME section contains, for use in error messages. | |
494 | ||
495 | If REQUIRED is non-zero, print an error if the core file doesn't | |
496 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
497 | ||
498 | static void | |
9eefc95f | 499 | get_core_register_section (struct regcache *regcache, |
1b1818e4 | 500 | const char *name, |
de57eccd | 501 | int which, |
1b1818e4 | 502 | const char *human_name, |
de57eccd JM |
503 | int required) |
504 | { | |
3ecda457 | 505 | static char *section_name = NULL; |
7be0c536 | 506 | struct bfd_section *section; |
de57eccd JM |
507 | bfd_size_type size; |
508 | char *contents; | |
509 | ||
3ecda457 | 510 | xfree (section_name); |
959b8724 | 511 | |
261b8d08 | 512 | if (ptid_get_lwp (inferior_ptid)) |
0de3b513 | 513 | section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid)); |
de57eccd | 514 | else |
3ecda457 | 515 | section_name = xstrdup (name); |
de57eccd JM |
516 | |
517 | section = bfd_get_section_by_name (core_bfd, section_name); | |
518 | if (! section) | |
519 | { | |
520 | if (required) | |
8a3fe4f8 | 521 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
522 | return; |
523 | } | |
524 | ||
525 | size = bfd_section_size (core_bfd, section); | |
526 | contents = alloca (size); | |
527 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
528 | (file_ptr) 0, size)) | |
529 | { | |
8a3fe4f8 | 530 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
531 | human_name, name); |
532 | return; | |
533 | } | |
534 | ||
0e24ac5d MK |
535 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
536 | { | |
537 | const struct regset *regset; | |
538 | ||
539 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
540 | if (regset == NULL) | |
541 | { | |
542 | if (required) | |
8a3fe4f8 | 543 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
544 | human_name); |
545 | return; | |
546 | } | |
547 | ||
9eefc95f | 548 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
549 | return; |
550 | } | |
551 | ||
552 | gdb_assert (core_vec); | |
9eefc95f | 553 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
554 | ((CORE_ADDR) |
555 | bfd_section_vma (core_bfd, section))); | |
556 | } | |
557 | ||
558 | ||
c906108c SS |
559 | /* Get the registers out of a core file. This is the machine- |
560 | independent part. Fetch_core_registers is the machine-dependent | |
561 | part, typically implemented in the xm-file for each architecture. */ | |
562 | ||
563 | /* We just get all the registers, so we don't use regno. */ | |
564 | ||
c906108c | 565 | static void |
28439f5e PA |
566 | get_core_registers (struct target_ops *ops, |
567 | struct regcache *regcache, int regno) | |
c906108c | 568 | { |
1b1818e4 | 569 | struct core_regset_section *sect_list; |
9c5ea4d9 | 570 | int i; |
c906108c | 571 | |
0e24ac5d MK |
572 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
573 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
574 | { |
575 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 576 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
577 | return; |
578 | } | |
579 | ||
1b1818e4 UW |
580 | sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache)); |
581 | if (sect_list) | |
582 | while (sect_list->sect_name != NULL) | |
583 | { | |
584 | if (strcmp (sect_list->sect_name, ".reg") == 0) | |
585 | get_core_register_section (regcache, sect_list->sect_name, | |
586 | 0, sect_list->human_name, 1); | |
587 | else if (strcmp (sect_list->sect_name, ".reg2") == 0) | |
588 | get_core_register_section (regcache, sect_list->sect_name, | |
589 | 2, sect_list->human_name, 0); | |
590 | else | |
591 | get_core_register_section (regcache, sect_list->sect_name, | |
592 | 3, sect_list->human_name, 0); | |
593 | ||
594 | sect_list++; | |
595 | } | |
596 | ||
597 | else | |
598 | { | |
599 | get_core_register_section (regcache, | |
600 | ".reg", 0, "general-purpose", 1); | |
601 | get_core_register_section (regcache, | |
602 | ".reg2", 2, "floating-point", 0); | |
603 | } | |
c906108c | 604 | |
9c5ea4d9 | 605 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 606 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
607 | if (!regcache_valid_p (regcache, i)) |
608 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
609 | } |
610 | ||
c906108c | 611 | static void |
fba45db2 | 612 | core_files_info (struct target_ops *t) |
c906108c | 613 | { |
07b82ea5 | 614 | print_section_info (core_data, core_bfd); |
c906108c | 615 | } |
e2544d02 | 616 | \f |
efcbbd14 UW |
617 | struct spuid_list |
618 | { | |
619 | gdb_byte *buf; | |
620 | ULONGEST offset; | |
621 | LONGEST len; | |
622 | ULONGEST pos; | |
623 | ULONGEST written; | |
624 | }; | |
625 | ||
626 | static void | |
627 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
628 | { | |
629 | struct spuid_list *list = list_p; | |
630 | enum bfd_endian byte_order | |
631 | = bfd_big_endian (abfd)? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
632 | int fd, pos = 0; | |
633 | ||
634 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
635 | if (pos == 0) | |
636 | return; | |
637 | ||
638 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
639 | { | |
640 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
641 | 4, byte_order, fd); | |
642 | list->written += 4; | |
643 | } | |
644 | list->pos += 4; | |
645 | } | |
646 | ||
e2544d02 RM |
647 | static LONGEST |
648 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
649 | const char *annex, gdb_byte *readbuf, |
650 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
651 | { |
652 | switch (object) | |
653 | { | |
654 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
655 | return section_table_xfer_memory_partial (readbuf, writebuf, |
656 | offset, len, | |
657 | core_data->sections, | |
658 | core_data->sections_end, | |
659 | NULL); | |
e2544d02 RM |
660 | |
661 | case TARGET_OBJECT_AUXV: | |
662 | if (readbuf) | |
663 | { | |
664 | /* When the aux vector is stored in core file, BFD | |
665 | represents this with a fake section called ".auxv". */ | |
666 | ||
c4c5b7ba | 667 | struct bfd_section *section; |
e2544d02 | 668 | bfd_size_type size; |
e2544d02 RM |
669 | |
670 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
671 | if (section == NULL) | |
672 | return -1; | |
673 | ||
674 | size = bfd_section_size (core_bfd, section); | |
675 | if (offset >= size) | |
676 | return 0; | |
677 | size -= offset; | |
678 | if (size > len) | |
679 | size = len; | |
403e1656 MK |
680 | if (size > 0 |
681 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
682 | (file_ptr) offset, size)) | |
e2544d02 | 683 | { |
8a3fe4f8 | 684 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
685 | return -1; |
686 | } | |
687 | ||
688 | return size; | |
689 | } | |
690 | return -1; | |
691 | ||
403e1656 MK |
692 | case TARGET_OBJECT_WCOOKIE: |
693 | if (readbuf) | |
694 | { | |
695 | /* When the StackGhost cookie is stored in core file, BFD | |
696 | represents this with a fake section called ".wcookie". */ | |
697 | ||
698 | struct bfd_section *section; | |
699 | bfd_size_type size; | |
403e1656 MK |
700 | |
701 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
702 | if (section == NULL) | |
703 | return -1; | |
704 | ||
705 | size = bfd_section_size (core_bfd, section); | |
706 | if (offset >= size) | |
707 | return 0; | |
708 | size -= offset; | |
709 | if (size > len) | |
710 | size = len; | |
711 | if (size > 0 | |
712 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
713 | (file_ptr) offset, size)) | |
714 | { | |
8a3fe4f8 | 715 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
716 | return -1; |
717 | } | |
718 | ||
719 | return size; | |
720 | } | |
721 | return -1; | |
722 | ||
de584861 PA |
723 | case TARGET_OBJECT_LIBRARIES: |
724 | if (core_gdbarch | |
725 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
726 | { | |
727 | if (writebuf) | |
728 | return -1; | |
729 | return | |
730 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
731 | readbuf, offset, len); | |
732 | } | |
733 | /* FALL THROUGH */ | |
734 | ||
efcbbd14 UW |
735 | case TARGET_OBJECT_SPU: |
736 | if (readbuf && annex) | |
737 | { | |
738 | /* When the SPU contexts are stored in a core file, BFD | |
739 | represents this with a fake section called "SPU/<annex>". */ | |
740 | ||
741 | struct bfd_section *section; | |
742 | bfd_size_type size; | |
efcbbd14 | 743 | char sectionstr[100]; |
c5504eaf | 744 | |
efcbbd14 UW |
745 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
746 | ||
747 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
748 | if (section == NULL) | |
749 | return -1; | |
750 | ||
751 | size = bfd_section_size (core_bfd, section); | |
752 | if (offset >= size) | |
753 | return 0; | |
754 | size -= offset; | |
755 | if (size > len) | |
756 | size = len; | |
757 | if (size > 0 | |
758 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
759 | (file_ptr) offset, size)) | |
760 | { | |
761 | warning (_("Couldn't read SPU section in core file.")); | |
762 | return -1; | |
763 | } | |
764 | ||
765 | return size; | |
766 | } | |
767 | else if (readbuf) | |
768 | { | |
769 | /* NULL annex requests list of all present spuids. */ | |
770 | struct spuid_list list; | |
c5504eaf | 771 | |
efcbbd14 UW |
772 | list.buf = readbuf; |
773 | list.offset = offset; | |
774 | list.len = len; | |
775 | list.pos = 0; | |
776 | list.written = 0; | |
777 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
778 | return list.written; | |
779 | } | |
780 | return -1; | |
781 | ||
e2544d02 RM |
782 | default: |
783 | if (ops->beneath != NULL) | |
784 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
785 | readbuf, writebuf, offset, len); | |
786 | return -1; | |
787 | } | |
788 | } | |
789 | ||
c906108c SS |
790 | \f |
791 | /* If mourn is being called in all the right places, this could be say | |
792 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
793 | ||
794 | static int | |
a6d9a66e | 795 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
796 | { |
797 | return 0; | |
798 | } | |
799 | ||
800 | ||
801 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
802 | exactly lively, are they? On the other hand, if we don't claim | |
803 | that each & every one is alive, then we don't get any of them | |
804 | to appear in an "info thread" command, which is quite a useful | |
805 | behaviour. | |
c5aa993b | 806 | */ |
c906108c | 807 | static int |
28439f5e | 808 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
809 | { |
810 | return 1; | |
811 | } | |
812 | ||
4eb0ad19 DJ |
813 | /* Ask the current architecture what it knows about this core file. |
814 | That will be used, in turn, to pick a better architecture. This | |
815 | wrapper could be avoided if targets got a chance to specialize | |
816 | core_ops. */ | |
817 | ||
818 | static const struct target_desc * | |
819 | core_read_description (struct target_ops *target) | |
820 | { | |
a78c2d62 UW |
821 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
822 | return gdbarch_core_read_description (core_gdbarch, target, core_bfd); | |
4eb0ad19 DJ |
823 | |
824 | return NULL; | |
825 | } | |
826 | ||
0de3b513 | 827 | static char * |
117de6a9 | 828 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
829 | { |
830 | static char buf[64]; | |
a5ee0f0c | 831 | int pid; |
0de3b513 | 832 | |
a5ee0f0c PA |
833 | /* The preferred way is to have a gdbarch/OS specific |
834 | implementation. */ | |
28439f5e PA |
835 | if (core_gdbarch |
836 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 837 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 838 | |
a5ee0f0c PA |
839 | /* Otherwise, if we don't have one, we'll just fallback to |
840 | "process", with normal_pid_to_str. */ | |
28439f5e | 841 | |
a5ee0f0c PA |
842 | /* Try the LWPID field first. */ |
843 | pid = ptid_get_lwp (ptid); | |
844 | if (pid != 0) | |
845 | return normal_pid_to_str (pid_to_ptid (pid)); | |
846 | ||
847 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
848 | only if it isn't a fake PID. */ | |
849 | if (!core_has_fake_pid) | |
850 | return normal_pid_to_str (ptid); | |
0de3b513 | 851 | |
a5ee0f0c PA |
852 | /* No luck. We simply don't have a valid PID to print. */ |
853 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
854 | return buf; |
855 | } | |
856 | ||
c35b1492 PA |
857 | static int |
858 | core_has_memory (struct target_ops *ops) | |
859 | { | |
860 | return (core_bfd != NULL); | |
861 | } | |
862 | ||
863 | static int | |
864 | core_has_stack (struct target_ops *ops) | |
865 | { | |
866 | return (core_bfd != NULL); | |
867 | } | |
868 | ||
869 | static int | |
870 | core_has_registers (struct target_ops *ops) | |
871 | { | |
872 | return (core_bfd != NULL); | |
873 | } | |
874 | ||
c906108c SS |
875 | /* Fill in core_ops with its defined operations and properties. */ |
876 | ||
877 | static void | |
fba45db2 | 878 | init_core_ops (void) |
c906108c SS |
879 | { |
880 | core_ops.to_shortname = "core"; | |
881 | core_ops.to_longname = "Local core dump file"; | |
882 | core_ops.to_doc = | |
883 | "Use a core file as a target. Specify the filename of the core file."; | |
884 | core_ops.to_open = core_open; | |
885 | core_ops.to_close = core_close; | |
886 | core_ops.to_attach = find_default_attach; | |
c906108c | 887 | core_ops.to_detach = core_detach; |
c906108c | 888 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 889 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
890 | core_ops.to_files_info = core_files_info; |
891 | core_ops.to_insert_breakpoint = ignore; | |
892 | core_ops.to_remove_breakpoint = ignore; | |
893 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 894 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 895 | core_ops.to_read_description = core_read_description; |
0de3b513 | 896 | core_ops.to_pid_to_str = core_pid_to_str; |
c0edd9ed | 897 | core_ops.to_stratum = process_stratum; |
c35b1492 PA |
898 | core_ops.to_has_memory = core_has_memory; |
899 | core_ops.to_has_stack = core_has_stack; | |
900 | core_ops.to_has_registers = core_has_registers; | |
c5aa993b | 901 | core_ops.to_magic = OPS_MAGIC; |
c0edd9ed JK |
902 | |
903 | if (core_target) | |
904 | internal_error (__FILE__, __LINE__, | |
905 | _("init_core_ops: core target already exists (\"%s\")."), | |
906 | core_target->to_longname); | |
907 | core_target = &core_ops; | |
c906108c SS |
908 | } |
909 | ||
c906108c | 910 | void |
fba45db2 | 911 | _initialize_corelow (void) |
c906108c SS |
912 | { |
913 | init_core_ops (); | |
914 | ||
28439f5e | 915 | add_target (&core_ops); |
c906108c | 916 | } |