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