Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
0b302171 JB |
3 | Copyright (C) 1986-1987, 1989, 1991-2001, 2003-2012 Free Software |
4 | Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "defs.h" | |
0e24ac5d | 22 | #include "arch-utils.h" |
c906108c SS |
23 | #include "gdb_string.h" |
24 | #include <errno.h> | |
25 | #include <signal.h> | |
26 | #include <fcntl.h> | |
fc24370e MS |
27 | #ifdef HAVE_SYS_FILE_H |
28 | #include <sys/file.h> /* needed for F_OK and friends */ | |
29 | #endif | |
c5aa993b | 30 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
31 | #include "inferior.h" |
32 | #include "symtab.h" | |
33 | #include "command.h" | |
34 | #include "bfd.h" | |
35 | #include "target.h" | |
36 | #include "gdbcore.h" | |
37 | #include "gdbthread.h" | |
4e052eda | 38 | #include "regcache.h" |
0e24ac5d | 39 | #include "regset.h" |
990f9fe3 | 40 | #include "symfile.h" |
4646aa9d | 41 | #include "exec.h" |
dbda9972 | 42 | #include "readline/readline.h" |
0e24ac5d | 43 | #include "gdb_assert.h" |
60250e8b | 44 | #include "exceptions.h" |
a77053c2 | 45 | #include "solib.h" |
f90c07ac | 46 | #include "filenames.h" |
6c95b8df | 47 | #include "progspace.h" |
516ba659 | 48 | #include "objfiles.h" |
8e860359 | 49 | |
ee28ca0f AC |
50 | #ifndef O_LARGEFILE |
51 | #define O_LARGEFILE 0 | |
52 | #endif | |
53 | ||
00e32a35 AC |
54 | /* List of all available core_fns. On gdb startup, each core file |
55 | register reader calls deprecated_add_core_fns() to register | |
56 | information on each core format it is prepared to read. */ | |
c906108c SS |
57 | |
58 | static struct core_fns *core_file_fns = NULL; | |
59 | ||
aff410f1 MS |
60 | /* The core_fns for a core file handler that is prepared to read the |
61 | core file currently open on core_bfd. */ | |
2acceee2 JM |
62 | |
63 | static struct core_fns *core_vec = NULL; | |
64 | ||
0e24ac5d MK |
65 | /* FIXME: kettenis/20031023: Eventually this variable should |
66 | disappear. */ | |
67 | ||
68 | struct gdbarch *core_gdbarch = NULL; | |
69 | ||
07b82ea5 PA |
70 | /* Per-core data. Currently, only the section table. Note that these |
71 | target sections are *not* mapped in the current address spaces' set | |
72 | of target sections --- those should come only from pure executable | |
73 | or shared library bfds. The core bfd sections are an | |
74 | implementation detail of the core target, just like ptrace is for | |
75 | unix child targets. */ | |
76 | static struct target_section_table *core_data; | |
77 | ||
3cdd9356 PA |
78 | /* True if we needed to fake the pid of the loaded core inferior. */ |
79 | static int core_has_fake_pid = 0; | |
80 | ||
a14ed312 | 81 | static void core_files_info (struct target_ops *); |
c906108c | 82 | |
a14ed312 | 83 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 84 | |
020cc13c | 85 | static int gdb_check_format (bfd *); |
2acceee2 | 86 | |
a14ed312 | 87 | static void core_open (char *, int); |
c906108c | 88 | |
136d6dae | 89 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 90 | |
a14ed312 | 91 | static void core_close (int); |
c906108c | 92 | |
74b7792f AC |
93 | static void core_close_cleanup (void *ignore); |
94 | ||
4efb68b1 | 95 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 96 | |
a14ed312 | 97 | static void init_core_ops (void); |
c906108c | 98 | |
a14ed312 | 99 | void _initialize_corelow (void); |
c906108c | 100 | |
c0edd9ed | 101 | static struct target_ops core_ops; |
c906108c | 102 | |
7f9f62ba PA |
103 | /* An arbitrary identifier for the core inferior. */ |
104 | #define CORELOW_PID 1 | |
105 | ||
aff410f1 MS |
106 | /* Link a new core_fns into the global core_file_fns list. Called on |
107 | gdb startup by the _initialize routine in each core file register | |
b021a221 | 108 | reader, to register information about each format the reader is |
aff410f1 | 109 | prepared to handle. */ |
c906108c SS |
110 | |
111 | void | |
00e32a35 | 112 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 113 | { |
c5aa993b | 114 | cf->next = core_file_fns; |
c906108c SS |
115 | core_file_fns = cf; |
116 | } | |
117 | ||
2acceee2 JM |
118 | /* The default function that core file handlers can use to examine a |
119 | core file BFD and decide whether or not to accept the job of | |
aff410f1 | 120 | reading the core file. */ |
2acceee2 JM |
121 | |
122 | int | |
fba45db2 | 123 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
124 | { |
125 | int result; | |
126 | ||
127 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
128 | return (result); | |
129 | } | |
130 | ||
131 | /* Walk through the list of core functions to find a set that can | |
06b9f45f | 132 | handle the core file open on ABFD. Returns pointer to set that is |
aff410f1 | 133 | selected. */ |
2acceee2 JM |
134 | |
135 | static struct core_fns * | |
fba45db2 | 136 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
137 | { |
138 | struct core_fns *cf; | |
139 | struct core_fns *yummy = NULL; | |
140 | int matches = 0;; | |
141 | ||
aff410f1 MS |
142 | /* Don't sniff if we have support for register sets in |
143 | CORE_GDBARCH. */ | |
0e24ac5d MK |
144 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
145 | return NULL; | |
146 | ||
2acceee2 JM |
147 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
148 | { | |
149 | if (cf->core_sniffer (cf, abfd)) | |
150 | { | |
151 | yummy = cf; | |
152 | matches++; | |
153 | } | |
154 | } | |
155 | if (matches > 1) | |
156 | { | |
8a3fe4f8 | 157 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
158 | bfd_get_filename (abfd), matches); |
159 | } | |
160 | else if (matches == 0) | |
06b9f45f JK |
161 | error (_("\"%s\": no core file handler recognizes format"), |
162 | bfd_get_filename (abfd)); | |
163 | ||
2acceee2 JM |
164 | return (yummy); |
165 | } | |
166 | ||
167 | /* The default is to reject every core file format we see. Either | |
168 | BFD has to recognize it, or we have to provide a function in the | |
aff410f1 | 169 | core file handler that recognizes it. */ |
2acceee2 JM |
170 | |
171 | int | |
fba45db2 | 172 | default_check_format (bfd *abfd) |
2acceee2 JM |
173 | { |
174 | return (0); | |
175 | } | |
176 | ||
aff410f1 | 177 | /* Attempt to recognize core file formats that BFD rejects. */ |
2acceee2 | 178 | |
020cc13c | 179 | static int |
fba45db2 | 180 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
181 | { |
182 | struct core_fns *cf; | |
183 | ||
184 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
185 | { | |
186 | if (cf->check_format (abfd)) | |
187 | { | |
81a9a963 | 188 | return (1); |
2acceee2 JM |
189 | } |
190 | } | |
81a9a963 | 191 | return (0); |
2acceee2 | 192 | } |
c906108c | 193 | |
aff410f1 MS |
194 | /* Discard all vestiges of any previous core file and mark data and |
195 | stack spaces as empty. */ | |
c906108c | 196 | |
c906108c | 197 | static void |
fba45db2 | 198 | core_close (int quitting) |
c906108c SS |
199 | { |
200 | char *name; | |
201 | ||
202 | if (core_bfd) | |
203 | { | |
959b8724 | 204 | int pid = ptid_get_pid (inferior_ptid); |
aff410f1 MS |
205 | inferior_ptid = null_ptid; /* Avoid confusion from thread |
206 | stuff. */ | |
06b9f45f JK |
207 | if (pid != 0) |
208 | exit_inferior_silent (pid); | |
c906108c | 209 | |
aff410f1 MS |
210 | /* Clear out solib state while the bfd is still open. See |
211 | comments in clear_solib in solib.c. */ | |
a77053c2 | 212 | clear_solib (); |
7a292a7a | 213 | |
06b9f45f JK |
214 | if (core_data) |
215 | { | |
216 | xfree (core_data->sections); | |
217 | xfree (core_data); | |
218 | core_data = NULL; | |
219 | } | |
3cdd9356 | 220 | core_has_fake_pid = 0; |
07b82ea5 | 221 | |
c906108c | 222 | name = bfd_get_filename (core_bfd); |
516ba659 | 223 | gdb_bfd_close_or_warn (core_bfd); |
b8c9b27d | 224 | xfree (name); |
c906108c | 225 | core_bfd = NULL; |
c906108c | 226 | } |
2acceee2 | 227 | core_vec = NULL; |
0e24ac5d | 228 | core_gdbarch = NULL; |
c906108c SS |
229 | } |
230 | ||
74b7792f AC |
231 | static void |
232 | core_close_cleanup (void *ignore) | |
233 | { | |
234 | core_close (0/*ignored*/); | |
235 | } | |
236 | ||
aff410f1 MS |
237 | /* Look for sections whose names start with `.reg/' so that we can |
238 | extract the list of threads in a core file. */ | |
c906108c SS |
239 | |
240 | static void | |
4efb68b1 | 241 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 242 | { |
0de3b513 | 243 | ptid_t ptid; |
3cdd9356 PA |
244 | int core_tid; |
245 | int pid, lwpid; | |
c906108c SS |
246 | asection *reg_sect = (asection *) reg_sect_arg; |
247 | ||
248 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
249 | return; | |
250 | ||
3cdd9356 | 251 | core_tid = atoi (bfd_section_name (abfd, asect) + 5); |
c906108c | 252 | |
261b8d08 PA |
253 | pid = bfd_core_file_pid (core_bfd); |
254 | if (pid == 0) | |
3cdd9356 PA |
255 | { |
256 | core_has_fake_pid = 1; | |
257 | pid = CORELOW_PID; | |
3cdd9356 | 258 | } |
0de3b513 | 259 | |
261b8d08 PA |
260 | lwpid = core_tid; |
261 | ||
6c95b8df PA |
262 | if (current_inferior ()->pid == 0) |
263 | inferior_appeared (current_inferior (), pid); | |
3cdd9356 PA |
264 | |
265 | ptid = ptid_build (pid, lwpid, 0); | |
266 | ||
267 | add_thread (ptid); | |
c906108c SS |
268 | |
269 | /* Warning, Will Robinson, looking at BFD private data! */ | |
270 | ||
271 | if (reg_sect != NULL | |
aff410f1 MS |
272 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
273 | inferior_ptid = ptid; /* Yes, make it current. */ | |
c906108c SS |
274 | } |
275 | ||
276 | /* This routine opens and sets up the core file bfd. */ | |
277 | ||
278 | static void | |
fba45db2 | 279 | core_open (char *filename, int from_tty) |
c906108c SS |
280 | { |
281 | const char *p; | |
282 | int siggy; | |
283 | struct cleanup *old_chain; | |
284 | char *temp; | |
285 | bfd *temp_bfd; | |
c906108c | 286 | int scratch_chan; |
ee28ca0f | 287 | int flags; |
8e7b59a5 | 288 | volatile struct gdb_exception except; |
c906108c SS |
289 | |
290 | target_preopen (from_tty); | |
291 | if (!filename) | |
292 | { | |
8a3fe4f8 | 293 | if (core_bfd) |
3e43a32a MS |
294 | error (_("No core file specified. (Use `detach' " |
295 | "to stop debugging a core file.)")); | |
8a3fe4f8 AC |
296 | else |
297 | error (_("No core file specified.")); | |
c906108c SS |
298 | } |
299 | ||
300 | filename = tilde_expand (filename); | |
aff410f1 | 301 | if (!IS_ABSOLUTE_PATH (filename)) |
c906108c | 302 | { |
aff410f1 MS |
303 | temp = concat (current_directory, "/", |
304 | filename, (char *) NULL); | |
b8c9b27d | 305 | xfree (filename); |
c906108c SS |
306 | filename = temp; |
307 | } | |
308 | ||
b8c9b27d | 309 | old_chain = make_cleanup (xfree, filename); |
c906108c | 310 | |
ee28ca0f AC |
311 | flags = O_BINARY | O_LARGEFILE; |
312 | if (write_files) | |
313 | flags |= O_RDWR; | |
314 | else | |
315 | flags |= O_RDONLY; | |
316 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
317 | if (scratch_chan < 0) |
318 | perror_with_name (filename); | |
319 | ||
9f76c2cd MM |
320 | temp_bfd = bfd_fopen (filename, gnutarget, |
321 | write_files ? FOPEN_RUB : FOPEN_RB, | |
322 | scratch_chan); | |
c906108c SS |
323 | if (temp_bfd == NULL) |
324 | perror_with_name (filename); | |
325 | ||
5aafa1cc PM |
326 | if (!bfd_check_format (temp_bfd, bfd_core) |
327 | && !gdb_check_format (temp_bfd)) | |
c906108c SS |
328 | { |
329 | /* Do it after the err msg */ | |
aff410f1 MS |
330 | /* FIXME: should be checking for errors from bfd_close (for one |
331 | thing, on error it does not free all the storage associated | |
332 | with the bfd). */ | |
5c65bbb6 | 333 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 334 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
335 | filename, bfd_errmsg (bfd_get_error ())); |
336 | } | |
337 | ||
aff410f1 MS |
338 | /* Looks semi-reasonable. Toss the old core file and work on the |
339 | new. */ | |
c906108c | 340 | |
c5aa993b | 341 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
342 | unpush_target (&core_ops); |
343 | core_bfd = temp_bfd; | |
74b7792f | 344 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 345 | |
0e24ac5d MK |
346 | /* FIXME: kettenis/20031023: This is very dangerous. The |
347 | CORE_GDBARCH that results from this call may very well be | |
348 | different from CURRENT_GDBARCH. However, its methods may only | |
349 | work if it is selected as the current architecture, because they | |
350 | rely on swapped data (see gdbarch.c). We should get rid of that | |
351 | swapped data. */ | |
352 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
353 | ||
2acceee2 JM |
354 | /* Find a suitable core file handler to munch on core_bfd */ |
355 | core_vec = sniff_core_bfd (core_bfd); | |
356 | ||
c906108c SS |
357 | validate_files (); |
358 | ||
07b82ea5 PA |
359 | core_data = XZALLOC (struct target_section_table); |
360 | ||
c906108c | 361 | /* Find the data section */ |
07b82ea5 | 362 | if (build_section_table (core_bfd, |
aff410f1 MS |
363 | &core_data->sections, |
364 | &core_data->sections_end)) | |
8a3fe4f8 | 365 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
366 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
367 | ||
2f1b5984 MK |
368 | /* If we have no exec file, try to set the architecture from the |
369 | core file. We don't do this unconditionally since an exec file | |
370 | typically contains more information that helps us determine the | |
371 | architecture than a core file. */ | |
372 | if (!exec_bfd) | |
373 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 374 | |
87ab71f0 | 375 | push_target (&core_ops); |
c906108c SS |
376 | discard_cleanups (old_chain); |
377 | ||
0de3b513 PA |
378 | /* Do this before acknowledging the inferior, so if |
379 | post_create_inferior throws (can happen easilly if you're loading | |
380 | a core file with the wrong exec), we aren't left with threads | |
381 | from the previous inferior. */ | |
382 | init_thread_list (); | |
383 | ||
3cdd9356 PA |
384 | inferior_ptid = null_ptid; |
385 | core_has_fake_pid = 0; | |
0de3b513 | 386 | |
739fc47a PA |
387 | /* Need to flush the register cache (and the frame cache) from a |
388 | previous debug session. If inferior_ptid ends up the same as the | |
389 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
390 | core2; core core1; core core2 --- then there's potential for | |
391 | get_current_regcache to return the cached regcache of the | |
392 | previous session, and the frame cache being stale. */ | |
393 | registers_changed (); | |
394 | ||
0de3b513 PA |
395 | /* Build up thread list from BFD sections, and possibly set the |
396 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 397 | section. */ |
0de3b513 PA |
398 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
399 | bfd_get_section_by_name (core_bfd, ".reg")); | |
400 | ||
3cdd9356 PA |
401 | if (ptid_equal (inferior_ptid, null_ptid)) |
402 | { | |
403 | /* Either we found no .reg/NN section, and hence we have a | |
404 | non-threaded core (single-threaded, from gdb's perspective), | |
405 | or for some reason add_to_thread_list couldn't determine | |
406 | which was the "main" thread. The latter case shouldn't | |
407 | usually happen, but we're dealing with input here, which can | |
408 | always be broken in different ways. */ | |
409 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 410 | |
3cdd9356 PA |
411 | if (thread == NULL) |
412 | { | |
c45ceae0 | 413 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
414 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
415 | add_thread_silent (inferior_ptid); | |
416 | } | |
417 | else | |
418 | switch_to_thread (thread->ptid); | |
419 | } | |
420 | ||
959b8724 PA |
421 | post_create_inferior (&core_ops, from_tty); |
422 | ||
0de3b513 PA |
423 | /* Now go through the target stack looking for threads since there |
424 | may be a thread_stratum target loaded on top of target core by | |
425 | now. The layer above should claim threads found in the BFD | |
426 | sections. */ | |
8e7b59a5 KS |
427 | TRY_CATCH (except, RETURN_MASK_ERROR) |
428 | { | |
429 | target_find_new_threads (); | |
430 | } | |
431 | ||
432 | if (except.reason < 0) | |
433 | exception_print (gdb_stderr, except); | |
0de3b513 | 434 | |
c906108c SS |
435 | p = bfd_core_file_failing_command (core_bfd); |
436 | if (p) | |
a3f17187 | 437 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
438 | |
439 | siggy = bfd_core_file_failing_signal (core_bfd); | |
440 | if (siggy > 0) | |
423ec54c | 441 | { |
aff410f1 MS |
442 | /* NOTE: target_signal_from_host() converts a target signal |
443 | value into gdb's internal signal value. Unfortunately gdb's | |
444 | internal value is called ``target_signal'' and this function | |
445 | got the name ..._from_host(). */ | |
423ec54c | 446 | enum target_signal sig = (core_gdbarch != NULL |
aff410f1 MS |
447 | ? gdbarch_target_signal_from_host (core_gdbarch, |
448 | siggy) | |
423ec54c JK |
449 | : target_signal_from_host (siggy)); |
450 | ||
aff410f1 MS |
451 | printf_filtered (_("Program terminated with signal %d, %s.\n"), |
452 | siggy, target_signal_to_string (sig)); | |
423ec54c | 453 | } |
c906108c | 454 | |
87ab71f0 PA |
455 | /* Fetch all registers from core file. */ |
456 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 457 | |
87ab71f0 PA |
458 | /* Now, set up the frame cache, and print the top of stack. */ |
459 | reinit_frame_cache (); | |
460 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
461 | } |
462 | ||
463 | static void | |
136d6dae | 464 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
465 | { |
466 | if (args) | |
8a3fe4f8 | 467 | error (_("Too many arguments")); |
136d6dae | 468 | unpush_target (ops); |
c906108c SS |
469 | reinit_frame_cache (); |
470 | if (from_tty) | |
a3f17187 | 471 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
472 | } |
473 | ||
07b82ea5 PA |
474 | #ifdef DEPRECATED_IBM6000_TARGET |
475 | ||
476 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
477 | pointer into the first new slot. This will not be necessary when | |
478 | the rs6000 target is converted to use the standard solib | |
479 | framework. */ | |
480 | ||
481 | struct target_section * | |
482 | deprecated_core_resize_section_table (int num_added) | |
483 | { | |
484 | int old_count; | |
485 | ||
486 | old_count = resize_section_table (core_data, num_added); | |
487 | return core_data->sections + old_count; | |
488 | } | |
489 | ||
490 | #endif | |
de57eccd JM |
491 | |
492 | /* Try to retrieve registers from a section in core_bfd, and supply | |
493 | them to core_vec->core_read_registers, as the register set numbered | |
494 | WHICH. | |
495 | ||
0de3b513 PA |
496 | If inferior_ptid's lwp member is zero, do the single-threaded |
497 | thing: look for a section named NAME. If inferior_ptid's lwp | |
498 | member is non-zero, do the multi-threaded thing: look for a section | |
499 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
500 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
501 | |
502 | HUMAN_NAME is a human-readable name for the kind of registers the | |
503 | NAME section contains, for use in error messages. | |
504 | ||
505 | If REQUIRED is non-zero, print an error if the core file doesn't | |
aff410f1 MS |
506 | have a section by the appropriate name. Otherwise, just do |
507 | nothing. */ | |
de57eccd JM |
508 | |
509 | static void | |
9eefc95f | 510 | get_core_register_section (struct regcache *regcache, |
1b1818e4 | 511 | const char *name, |
de57eccd | 512 | int which, |
1b1818e4 | 513 | const char *human_name, |
de57eccd JM |
514 | int required) |
515 | { | |
3ecda457 | 516 | static char *section_name = NULL; |
7be0c536 | 517 | struct bfd_section *section; |
de57eccd JM |
518 | bfd_size_type size; |
519 | char *contents; | |
520 | ||
3ecda457 | 521 | xfree (section_name); |
959b8724 | 522 | |
261b8d08 | 523 | if (ptid_get_lwp (inferior_ptid)) |
aff410f1 MS |
524 | section_name = xstrprintf ("%s/%ld", name, |
525 | ptid_get_lwp (inferior_ptid)); | |
de57eccd | 526 | else |
3ecda457 | 527 | section_name = xstrdup (name); |
de57eccd JM |
528 | |
529 | section = bfd_get_section_by_name (core_bfd, section_name); | |
530 | if (! section) | |
531 | { | |
532 | if (required) | |
aff410f1 MS |
533 | warning (_("Couldn't find %s registers in core file."), |
534 | human_name); | |
de57eccd JM |
535 | return; |
536 | } | |
537 | ||
538 | size = bfd_section_size (core_bfd, section); | |
539 | contents = alloca (size); | |
540 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
541 | (file_ptr) 0, size)) | |
542 | { | |
8a3fe4f8 | 543 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
544 | human_name, name); |
545 | return; | |
546 | } | |
547 | ||
0e24ac5d MK |
548 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
549 | { | |
550 | const struct regset *regset; | |
551 | ||
aff410f1 MS |
552 | regset = gdbarch_regset_from_core_section (core_gdbarch, |
553 | name, size); | |
0e24ac5d MK |
554 | if (regset == NULL) |
555 | { | |
556 | if (required) | |
8a3fe4f8 | 557 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
558 | human_name); |
559 | return; | |
560 | } | |
561 | ||
9eefc95f | 562 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
563 | return; |
564 | } | |
565 | ||
566 | gdb_assert (core_vec); | |
9eefc95f | 567 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
568 | ((CORE_ADDR) |
569 | bfd_section_vma (core_bfd, section))); | |
570 | } | |
571 | ||
572 | ||
c906108c SS |
573 | /* Get the registers out of a core file. This is the machine- |
574 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
575 | part, typically implemented in the xm-file for each |
576 | architecture. */ | |
c906108c SS |
577 | |
578 | /* We just get all the registers, so we don't use regno. */ | |
579 | ||
c906108c | 580 | static void |
28439f5e PA |
581 | get_core_registers (struct target_ops *ops, |
582 | struct regcache *regcache, int regno) | |
c906108c | 583 | { |
1b1818e4 | 584 | struct core_regset_section *sect_list; |
9c5ea4d9 | 585 | int i; |
c906108c | 586 | |
0e24ac5d MK |
587 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
588 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
589 | { |
590 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 591 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
592 | return; |
593 | } | |
594 | ||
1b1818e4 UW |
595 | sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache)); |
596 | if (sect_list) | |
597 | while (sect_list->sect_name != NULL) | |
598 | { | |
599 | if (strcmp (sect_list->sect_name, ".reg") == 0) | |
600 | get_core_register_section (regcache, sect_list->sect_name, | |
601 | 0, sect_list->human_name, 1); | |
602 | else if (strcmp (sect_list->sect_name, ".reg2") == 0) | |
603 | get_core_register_section (regcache, sect_list->sect_name, | |
604 | 2, sect_list->human_name, 0); | |
605 | else | |
606 | get_core_register_section (regcache, sect_list->sect_name, | |
607 | 3, sect_list->human_name, 0); | |
608 | ||
609 | sect_list++; | |
610 | } | |
611 | ||
612 | else | |
613 | { | |
614 | get_core_register_section (regcache, | |
615 | ".reg", 0, "general-purpose", 1); | |
616 | get_core_register_section (regcache, | |
617 | ".reg2", 2, "floating-point", 0); | |
618 | } | |
c906108c | 619 | |
ee99023e | 620 | /* Mark all registers not found in the core as unavailable. */ |
13b8769f | 621 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ee99023e | 622 | if (regcache_register_status (regcache, i) == REG_UNKNOWN) |
9c5ea4d9 | 623 | regcache_raw_supply (regcache, i, NULL); |
c906108c SS |
624 | } |
625 | ||
c906108c | 626 | static void |
fba45db2 | 627 | core_files_info (struct target_ops *t) |
c906108c | 628 | { |
07b82ea5 | 629 | print_section_info (core_data, core_bfd); |
c906108c | 630 | } |
e2544d02 | 631 | \f |
efcbbd14 UW |
632 | struct spuid_list |
633 | { | |
634 | gdb_byte *buf; | |
635 | ULONGEST offset; | |
636 | LONGEST len; | |
637 | ULONGEST pos; | |
638 | ULONGEST written; | |
639 | }; | |
640 | ||
641 | static void | |
642 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
643 | { | |
644 | struct spuid_list *list = list_p; | |
645 | enum bfd_endian byte_order | |
aff410f1 | 646 | = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
efcbbd14 UW |
647 | int fd, pos = 0; |
648 | ||
649 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
650 | if (pos == 0) | |
651 | return; | |
652 | ||
653 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
654 | { | |
655 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
656 | 4, byte_order, fd); | |
657 | list->written += 4; | |
658 | } | |
659 | list->pos += 4; | |
660 | } | |
661 | ||
e2544d02 RM |
662 | static LONGEST |
663 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 | 664 | const char *annex, gdb_byte *readbuf, |
aff410f1 MS |
665 | const gdb_byte *writebuf, ULONGEST offset, |
666 | LONGEST len) | |
e2544d02 RM |
667 | { |
668 | switch (object) | |
669 | { | |
670 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
671 | return section_table_xfer_memory_partial (readbuf, writebuf, |
672 | offset, len, | |
673 | core_data->sections, | |
674 | core_data->sections_end, | |
675 | NULL); | |
e2544d02 RM |
676 | |
677 | case TARGET_OBJECT_AUXV: | |
678 | if (readbuf) | |
679 | { | |
680 | /* When the aux vector is stored in core file, BFD | |
681 | represents this with a fake section called ".auxv". */ | |
682 | ||
c4c5b7ba | 683 | struct bfd_section *section; |
e2544d02 | 684 | bfd_size_type size; |
e2544d02 RM |
685 | |
686 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
687 | if (section == NULL) | |
688 | return -1; | |
689 | ||
690 | size = bfd_section_size (core_bfd, section); | |
691 | if (offset >= size) | |
692 | return 0; | |
693 | size -= offset; | |
694 | if (size > len) | |
695 | size = len; | |
403e1656 MK |
696 | if (size > 0 |
697 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
698 | (file_ptr) offset, size)) | |
e2544d02 | 699 | { |
8a3fe4f8 | 700 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
701 | return -1; |
702 | } | |
703 | ||
704 | return size; | |
705 | } | |
706 | return -1; | |
707 | ||
403e1656 MK |
708 | case TARGET_OBJECT_WCOOKIE: |
709 | if (readbuf) | |
710 | { | |
711 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
712 | represents this with a fake section called |
713 | ".wcookie". */ | |
403e1656 MK |
714 | |
715 | struct bfd_section *section; | |
716 | bfd_size_type size; | |
403e1656 MK |
717 | |
718 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
719 | if (section == NULL) | |
720 | return -1; | |
721 | ||
722 | size = bfd_section_size (core_bfd, section); | |
723 | if (offset >= size) | |
724 | return 0; | |
725 | size -= offset; | |
726 | if (size > len) | |
727 | size = len; | |
728 | if (size > 0 | |
729 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
730 | (file_ptr) offset, size)) | |
731 | { | |
8a3fe4f8 | 732 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
733 | return -1; |
734 | } | |
735 | ||
736 | return size; | |
737 | } | |
738 | return -1; | |
739 | ||
de584861 PA |
740 | case TARGET_OBJECT_LIBRARIES: |
741 | if (core_gdbarch | |
742 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
743 | { | |
744 | if (writebuf) | |
745 | return -1; | |
746 | return | |
747 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
748 | readbuf, offset, len); | |
749 | } | |
750 | /* FALL THROUGH */ | |
751 | ||
efcbbd14 UW |
752 | case TARGET_OBJECT_SPU: |
753 | if (readbuf && annex) | |
754 | { | |
755 | /* When the SPU contexts are stored in a core file, BFD | |
aff410f1 MS |
756 | represents this with a fake section called |
757 | "SPU/<annex>". */ | |
efcbbd14 UW |
758 | |
759 | struct bfd_section *section; | |
760 | bfd_size_type size; | |
efcbbd14 | 761 | char sectionstr[100]; |
c5504eaf | 762 | |
efcbbd14 UW |
763 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
764 | ||
765 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
766 | if (section == NULL) | |
767 | return -1; | |
768 | ||
769 | size = bfd_section_size (core_bfd, section); | |
770 | if (offset >= size) | |
771 | return 0; | |
772 | size -= offset; | |
773 | if (size > len) | |
774 | size = len; | |
775 | if (size > 0 | |
776 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
777 | (file_ptr) offset, size)) | |
778 | { | |
779 | warning (_("Couldn't read SPU section in core file.")); | |
780 | return -1; | |
781 | } | |
782 | ||
783 | return size; | |
784 | } | |
785 | else if (readbuf) | |
786 | { | |
787 | /* NULL annex requests list of all present spuids. */ | |
788 | struct spuid_list list; | |
c5504eaf | 789 | |
efcbbd14 UW |
790 | list.buf = readbuf; |
791 | list.offset = offset; | |
792 | list.len = len; | |
793 | list.pos = 0; | |
794 | list.written = 0; | |
795 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
796 | return list.written; | |
797 | } | |
798 | return -1; | |
799 | ||
e2544d02 RM |
800 | default: |
801 | if (ops->beneath != NULL) | |
aff410f1 MS |
802 | return ops->beneath->to_xfer_partial (ops->beneath, object, |
803 | annex, readbuf, | |
804 | writebuf, offset, len); | |
e2544d02 RM |
805 | return -1; |
806 | } | |
807 | } | |
808 | ||
c906108c SS |
809 | \f |
810 | /* If mourn is being called in all the right places, this could be say | |
aff410f1 MS |
811 | `gdb internal error' (since generic_mourn calls |
812 | breakpoint_init_inferior). */ | |
c906108c SS |
813 | |
814 | static int | |
a6d9a66e | 815 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
816 | { |
817 | return 0; | |
818 | } | |
819 | ||
820 | ||
821 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
822 | exactly lively, are they? On the other hand, if we don't claim | |
823 | that each & every one is alive, then we don't get any of them | |
824 | to appear in an "info thread" command, which is quite a useful | |
825 | behaviour. | |
c5aa993b | 826 | */ |
c906108c | 827 | static int |
28439f5e | 828 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
829 | { |
830 | return 1; | |
831 | } | |
832 | ||
4eb0ad19 DJ |
833 | /* Ask the current architecture what it knows about this core file. |
834 | That will be used, in turn, to pick a better architecture. This | |
835 | wrapper could be avoided if targets got a chance to specialize | |
836 | core_ops. */ | |
837 | ||
838 | static const struct target_desc * | |
839 | core_read_description (struct target_ops *target) | |
840 | { | |
a78c2d62 | 841 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
aff410f1 MS |
842 | return gdbarch_core_read_description (core_gdbarch, |
843 | target, core_bfd); | |
4eb0ad19 DJ |
844 | |
845 | return NULL; | |
846 | } | |
847 | ||
0de3b513 | 848 | static char * |
117de6a9 | 849 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
850 | { |
851 | static char buf[64]; | |
a5ee0f0c | 852 | int pid; |
0de3b513 | 853 | |
a5ee0f0c PA |
854 | /* The preferred way is to have a gdbarch/OS specific |
855 | implementation. */ | |
28439f5e PA |
856 | if (core_gdbarch |
857 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 858 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 859 | |
a5ee0f0c PA |
860 | /* Otherwise, if we don't have one, we'll just fallback to |
861 | "process", with normal_pid_to_str. */ | |
28439f5e | 862 | |
a5ee0f0c PA |
863 | /* Try the LWPID field first. */ |
864 | pid = ptid_get_lwp (ptid); | |
865 | if (pid != 0) | |
866 | return normal_pid_to_str (pid_to_ptid (pid)); | |
867 | ||
868 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
869 | only if it isn't a fake PID. */ | |
870 | if (!core_has_fake_pid) | |
871 | return normal_pid_to_str (ptid); | |
0de3b513 | 872 | |
a5ee0f0c PA |
873 | /* No luck. We simply don't have a valid PID to print. */ |
874 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
875 | return buf; |
876 | } | |
877 | ||
c35b1492 PA |
878 | static int |
879 | core_has_memory (struct target_ops *ops) | |
880 | { | |
881 | return (core_bfd != NULL); | |
882 | } | |
883 | ||
884 | static int | |
885 | core_has_stack (struct target_ops *ops) | |
886 | { | |
887 | return (core_bfd != NULL); | |
888 | } | |
889 | ||
890 | static int | |
891 | core_has_registers (struct target_ops *ops) | |
892 | { | |
893 | return (core_bfd != NULL); | |
894 | } | |
895 | ||
c906108c SS |
896 | /* Fill in core_ops with its defined operations and properties. */ |
897 | ||
898 | static void | |
fba45db2 | 899 | init_core_ops (void) |
c906108c SS |
900 | { |
901 | core_ops.to_shortname = "core"; | |
902 | core_ops.to_longname = "Local core dump file"; | |
903 | core_ops.to_doc = | |
904 | "Use a core file as a target. Specify the filename of the core file."; | |
905 | core_ops.to_open = core_open; | |
906 | core_ops.to_close = core_close; | |
907 | core_ops.to_attach = find_default_attach; | |
c906108c | 908 | core_ops.to_detach = core_detach; |
c906108c | 909 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 910 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
911 | core_ops.to_files_info = core_files_info; |
912 | core_ops.to_insert_breakpoint = ignore; | |
913 | core_ops.to_remove_breakpoint = ignore; | |
914 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 915 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 916 | core_ops.to_read_description = core_read_description; |
0de3b513 | 917 | core_ops.to_pid_to_str = core_pid_to_str; |
c0edd9ed | 918 | core_ops.to_stratum = process_stratum; |
c35b1492 PA |
919 | core_ops.to_has_memory = core_has_memory; |
920 | core_ops.to_has_stack = core_has_stack; | |
921 | core_ops.to_has_registers = core_has_registers; | |
c5aa993b | 922 | core_ops.to_magic = OPS_MAGIC; |
c0edd9ed JK |
923 | |
924 | if (core_target) | |
925 | internal_error (__FILE__, __LINE__, | |
926 | _("init_core_ops: core target already exists (\"%s\")."), | |
927 | core_target->to_longname); | |
928 | core_target = &core_ops; | |
c906108c SS |
929 | } |
930 | ||
c906108c | 931 | void |
fba45db2 | 932 | _initialize_corelow (void) |
c906108c SS |
933 | { |
934 | init_core_ops (); | |
935 | ||
28439f5e | 936 | add_target (&core_ops); |
c906108c | 937 | } |