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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 | core_gdbarch = gdbarch_from_bfd (core_bfd); |
348 | ||
2acceee2 JM |
349 | /* Find a suitable core file handler to munch on core_bfd */ |
350 | core_vec = sniff_core_bfd (core_bfd); | |
351 | ||
c906108c SS |
352 | validate_files (); |
353 | ||
07b82ea5 PA |
354 | core_data = XZALLOC (struct target_section_table); |
355 | ||
c906108c | 356 | /* Find the data section */ |
07b82ea5 | 357 | if (build_section_table (core_bfd, |
aff410f1 MS |
358 | &core_data->sections, |
359 | &core_data->sections_end)) | |
8a3fe4f8 | 360 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
361 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
362 | ||
2f1b5984 MK |
363 | /* If we have no exec file, try to set the architecture from the |
364 | core file. We don't do this unconditionally since an exec file | |
365 | typically contains more information that helps us determine the | |
366 | architecture than a core file. */ | |
367 | if (!exec_bfd) | |
368 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 369 | |
87ab71f0 | 370 | push_target (&core_ops); |
c906108c SS |
371 | discard_cleanups (old_chain); |
372 | ||
0de3b513 PA |
373 | /* Do this before acknowledging the inferior, so if |
374 | post_create_inferior throws (can happen easilly if you're loading | |
375 | a core file with the wrong exec), we aren't left with threads | |
376 | from the previous inferior. */ | |
377 | init_thread_list (); | |
378 | ||
3cdd9356 | 379 | inferior_ptid = null_ptid; |
0de3b513 | 380 | |
739fc47a PA |
381 | /* Need to flush the register cache (and the frame cache) from a |
382 | previous debug session. If inferior_ptid ends up the same as the | |
383 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
384 | core2; core core1; core core2 --- then there's potential for | |
385 | get_current_regcache to return the cached regcache of the | |
386 | previous session, and the frame cache being stale. */ | |
387 | registers_changed (); | |
388 | ||
0de3b513 PA |
389 | /* Build up thread list from BFD sections, and possibly set the |
390 | current thread to the .reg/NN section matching the .reg | |
aff410f1 | 391 | section. */ |
0de3b513 PA |
392 | bfd_map_over_sections (core_bfd, add_to_thread_list, |
393 | bfd_get_section_by_name (core_bfd, ".reg")); | |
394 | ||
3cdd9356 PA |
395 | if (ptid_equal (inferior_ptid, null_ptid)) |
396 | { | |
397 | /* Either we found no .reg/NN section, and hence we have a | |
398 | non-threaded core (single-threaded, from gdb's perspective), | |
399 | or for some reason add_to_thread_list couldn't determine | |
400 | which was the "main" thread. The latter case shouldn't | |
401 | usually happen, but we're dealing with input here, which can | |
402 | always be broken in different ways. */ | |
403 | struct thread_info *thread = first_thread_of_process (-1); | |
c5504eaf | 404 | |
3cdd9356 PA |
405 | if (thread == NULL) |
406 | { | |
c45ceae0 | 407 | inferior_appeared (current_inferior (), CORELOW_PID); |
3cdd9356 PA |
408 | inferior_ptid = pid_to_ptid (CORELOW_PID); |
409 | add_thread_silent (inferior_ptid); | |
410 | } | |
411 | else | |
412 | switch_to_thread (thread->ptid); | |
413 | } | |
414 | ||
959b8724 PA |
415 | post_create_inferior (&core_ops, from_tty); |
416 | ||
0de3b513 PA |
417 | /* Now go through the target stack looking for threads since there |
418 | may be a thread_stratum target loaded on top of target core by | |
419 | now. The layer above should claim threads found in the BFD | |
420 | sections. */ | |
8e7b59a5 KS |
421 | TRY_CATCH (except, RETURN_MASK_ERROR) |
422 | { | |
423 | target_find_new_threads (); | |
424 | } | |
425 | ||
426 | if (except.reason < 0) | |
427 | exception_print (gdb_stderr, except); | |
0de3b513 | 428 | |
c906108c SS |
429 | p = bfd_core_file_failing_command (core_bfd); |
430 | if (p) | |
a3f17187 | 431 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
432 | |
433 | siggy = bfd_core_file_failing_signal (core_bfd); | |
434 | if (siggy > 0) | |
423ec54c | 435 | { |
22203bbf | 436 | /* If we don't have a CORE_GDBARCH to work with, assume a native |
1f8cf220 PA |
437 | core (map gdb_signal from host signals). If we do have |
438 | CORE_GDBARCH to work with, but no gdb_signal_from_target | |
439 | implementation for that gdbarch, as a fallback measure, | |
440 | assume the host signal mapping. It'll be correct for native | |
441 | cores, but most likely incorrect for cross-cores. */ | |
2ea28649 | 442 | enum gdb_signal sig = (core_gdbarch != NULL |
1f8cf220 PA |
443 | && gdbarch_gdb_signal_from_target_p (core_gdbarch) |
444 | ? gdbarch_gdb_signal_from_target (core_gdbarch, | |
445 | siggy) | |
446 | : gdb_signal_from_host (siggy)); | |
423ec54c | 447 | |
aff410f1 | 448 | printf_filtered (_("Program terminated with signal %d, %s.\n"), |
2ea28649 | 449 | siggy, gdb_signal_to_string (sig)); |
423ec54c | 450 | } |
c906108c | 451 | |
87ab71f0 PA |
452 | /* Fetch all registers from core file. */ |
453 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 454 | |
87ab71f0 PA |
455 | /* Now, set up the frame cache, and print the top of stack. */ |
456 | reinit_frame_cache (); | |
457 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
458 | } |
459 | ||
460 | static void | |
136d6dae | 461 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
462 | { |
463 | if (args) | |
8a3fe4f8 | 464 | error (_("Too many arguments")); |
136d6dae | 465 | unpush_target (ops); |
c906108c SS |
466 | reinit_frame_cache (); |
467 | if (from_tty) | |
a3f17187 | 468 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
469 | } |
470 | ||
07b82ea5 PA |
471 | #ifdef DEPRECATED_IBM6000_TARGET |
472 | ||
473 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
474 | pointer into the first new slot. This will not be necessary when | |
475 | the rs6000 target is converted to use the standard solib | |
476 | framework. */ | |
477 | ||
478 | struct target_section * | |
479 | deprecated_core_resize_section_table (int num_added) | |
480 | { | |
481 | int old_count; | |
482 | ||
483 | old_count = resize_section_table (core_data, num_added); | |
484 | return core_data->sections + old_count; | |
485 | } | |
486 | ||
487 | #endif | |
de57eccd JM |
488 | |
489 | /* Try to retrieve registers from a section in core_bfd, and supply | |
490 | them to core_vec->core_read_registers, as the register set numbered | |
491 | WHICH. | |
492 | ||
0de3b513 PA |
493 | If inferior_ptid's lwp member is zero, do the single-threaded |
494 | thing: look for a section named NAME. If inferior_ptid's lwp | |
495 | member is non-zero, do the multi-threaded thing: look for a section | |
496 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
497 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
498 | |
499 | HUMAN_NAME is a human-readable name for the kind of registers the | |
500 | NAME section contains, for use in error messages. | |
501 | ||
502 | If REQUIRED is non-zero, print an error if the core file doesn't | |
aff410f1 MS |
503 | have a section by the appropriate name. Otherwise, just do |
504 | nothing. */ | |
de57eccd JM |
505 | |
506 | static void | |
9eefc95f | 507 | get_core_register_section (struct regcache *regcache, |
1b1818e4 | 508 | const char *name, |
de57eccd | 509 | int which, |
1b1818e4 | 510 | const char *human_name, |
de57eccd JM |
511 | int required) |
512 | { | |
3ecda457 | 513 | static char *section_name = NULL; |
7be0c536 | 514 | struct bfd_section *section; |
de57eccd JM |
515 | bfd_size_type size; |
516 | char *contents; | |
517 | ||
3ecda457 | 518 | xfree (section_name); |
959b8724 | 519 | |
261b8d08 | 520 | if (ptid_get_lwp (inferior_ptid)) |
aff410f1 MS |
521 | section_name = xstrprintf ("%s/%ld", name, |
522 | ptid_get_lwp (inferior_ptid)); | |
de57eccd | 523 | else |
3ecda457 | 524 | section_name = xstrdup (name); |
de57eccd JM |
525 | |
526 | section = bfd_get_section_by_name (core_bfd, section_name); | |
527 | if (! section) | |
528 | { | |
529 | if (required) | |
aff410f1 MS |
530 | warning (_("Couldn't find %s registers in core file."), |
531 | human_name); | |
de57eccd JM |
532 | return; |
533 | } | |
534 | ||
535 | size = bfd_section_size (core_bfd, section); | |
536 | contents = alloca (size); | |
537 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
538 | (file_ptr) 0, size)) | |
539 | { | |
8a3fe4f8 | 540 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
541 | human_name, name); |
542 | return; | |
543 | } | |
544 | ||
0e24ac5d MK |
545 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
546 | { | |
547 | const struct regset *regset; | |
548 | ||
aff410f1 MS |
549 | regset = gdbarch_regset_from_core_section (core_gdbarch, |
550 | name, size); | |
0e24ac5d MK |
551 | if (regset == NULL) |
552 | { | |
553 | if (required) | |
8a3fe4f8 | 554 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
555 | human_name); |
556 | return; | |
557 | } | |
558 | ||
9eefc95f | 559 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
560 | return; |
561 | } | |
562 | ||
563 | gdb_assert (core_vec); | |
9eefc95f | 564 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
565 | ((CORE_ADDR) |
566 | bfd_section_vma (core_bfd, section))); | |
567 | } | |
568 | ||
569 | ||
c906108c SS |
570 | /* Get the registers out of a core file. This is the machine- |
571 | independent part. Fetch_core_registers is the machine-dependent | |
aff410f1 MS |
572 | part, typically implemented in the xm-file for each |
573 | architecture. */ | |
c906108c SS |
574 | |
575 | /* We just get all the registers, so we don't use regno. */ | |
576 | ||
c906108c | 577 | static void |
28439f5e PA |
578 | get_core_registers (struct target_ops *ops, |
579 | struct regcache *regcache, int regno) | |
c906108c | 580 | { |
1b1818e4 | 581 | struct core_regset_section *sect_list; |
9c5ea4d9 | 582 | int i; |
c906108c | 583 | |
0e24ac5d MK |
584 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
585 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
586 | { |
587 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 588 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
589 | return; |
590 | } | |
591 | ||
1b1818e4 UW |
592 | sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache)); |
593 | if (sect_list) | |
594 | while (sect_list->sect_name != NULL) | |
595 | { | |
596 | if (strcmp (sect_list->sect_name, ".reg") == 0) | |
597 | get_core_register_section (regcache, sect_list->sect_name, | |
598 | 0, sect_list->human_name, 1); | |
599 | else if (strcmp (sect_list->sect_name, ".reg2") == 0) | |
600 | get_core_register_section (regcache, sect_list->sect_name, | |
601 | 2, sect_list->human_name, 0); | |
602 | else | |
603 | get_core_register_section (regcache, sect_list->sect_name, | |
604 | 3, sect_list->human_name, 0); | |
605 | ||
606 | sect_list++; | |
607 | } | |
608 | ||
609 | else | |
610 | { | |
611 | get_core_register_section (regcache, | |
612 | ".reg", 0, "general-purpose", 1); | |
613 | get_core_register_section (regcache, | |
614 | ".reg2", 2, "floating-point", 0); | |
615 | } | |
c906108c | 616 | |
ee99023e | 617 | /* Mark all registers not found in the core as unavailable. */ |
13b8769f | 618 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ee99023e | 619 | if (regcache_register_status (regcache, i) == REG_UNKNOWN) |
9c5ea4d9 | 620 | regcache_raw_supply (regcache, i, NULL); |
c906108c SS |
621 | } |
622 | ||
c906108c | 623 | static void |
fba45db2 | 624 | core_files_info (struct target_ops *t) |
c906108c | 625 | { |
07b82ea5 | 626 | print_section_info (core_data, core_bfd); |
c906108c | 627 | } |
e2544d02 | 628 | \f |
efcbbd14 UW |
629 | struct spuid_list |
630 | { | |
631 | gdb_byte *buf; | |
632 | ULONGEST offset; | |
633 | LONGEST len; | |
634 | ULONGEST pos; | |
635 | ULONGEST written; | |
636 | }; | |
637 | ||
638 | static void | |
639 | add_to_spuid_list (bfd *abfd, asection *asect, void *list_p) | |
640 | { | |
641 | struct spuid_list *list = list_p; | |
642 | enum bfd_endian byte_order | |
aff410f1 | 643 | = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
efcbbd14 UW |
644 | int fd, pos = 0; |
645 | ||
646 | sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos); | |
647 | if (pos == 0) | |
648 | return; | |
649 | ||
650 | if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len) | |
651 | { | |
652 | store_unsigned_integer (list->buf + list->pos - list->offset, | |
653 | 4, byte_order, fd); | |
654 | list->written += 4; | |
655 | } | |
656 | list->pos += 4; | |
657 | } | |
658 | ||
e2544d02 RM |
659 | static LONGEST |
660 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 | 661 | const char *annex, gdb_byte *readbuf, |
aff410f1 MS |
662 | const gdb_byte *writebuf, ULONGEST offset, |
663 | LONGEST len) | |
e2544d02 RM |
664 | { |
665 | switch (object) | |
666 | { | |
667 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
668 | return section_table_xfer_memory_partial (readbuf, writebuf, |
669 | offset, len, | |
670 | core_data->sections, | |
671 | core_data->sections_end, | |
672 | NULL); | |
e2544d02 RM |
673 | |
674 | case TARGET_OBJECT_AUXV: | |
675 | if (readbuf) | |
676 | { | |
677 | /* When the aux vector is stored in core file, BFD | |
678 | represents this with a fake section called ".auxv". */ | |
679 | ||
c4c5b7ba | 680 | struct bfd_section *section; |
e2544d02 | 681 | bfd_size_type size; |
e2544d02 RM |
682 | |
683 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
684 | if (section == NULL) | |
685 | return -1; | |
686 | ||
687 | size = bfd_section_size (core_bfd, section); | |
688 | if (offset >= size) | |
689 | return 0; | |
690 | size -= offset; | |
691 | if (size > len) | |
692 | size = len; | |
403e1656 MK |
693 | if (size > 0 |
694 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
695 | (file_ptr) offset, size)) | |
e2544d02 | 696 | { |
8a3fe4f8 | 697 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
698 | return -1; |
699 | } | |
700 | ||
701 | return size; | |
702 | } | |
703 | return -1; | |
704 | ||
403e1656 MK |
705 | case TARGET_OBJECT_WCOOKIE: |
706 | if (readbuf) | |
707 | { | |
708 | /* When the StackGhost cookie is stored in core file, BFD | |
aff410f1 MS |
709 | represents this with a fake section called |
710 | ".wcookie". */ | |
403e1656 MK |
711 | |
712 | struct bfd_section *section; | |
713 | bfd_size_type size; | |
403e1656 MK |
714 | |
715 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
716 | if (section == NULL) | |
717 | return -1; | |
718 | ||
719 | size = bfd_section_size (core_bfd, section); | |
720 | if (offset >= size) | |
721 | return 0; | |
722 | size -= offset; | |
723 | if (size > len) | |
724 | size = len; | |
725 | if (size > 0 | |
726 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
727 | (file_ptr) offset, size)) | |
728 | { | |
8a3fe4f8 | 729 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
730 | return -1; |
731 | } | |
732 | ||
733 | return size; | |
734 | } | |
735 | return -1; | |
736 | ||
de584861 PA |
737 | case TARGET_OBJECT_LIBRARIES: |
738 | if (core_gdbarch | |
739 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
740 | { | |
741 | if (writebuf) | |
742 | return -1; | |
743 | return | |
744 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
745 | readbuf, offset, len); | |
746 | } | |
747 | /* FALL THROUGH */ | |
748 | ||
efcbbd14 UW |
749 | case TARGET_OBJECT_SPU: |
750 | if (readbuf && annex) | |
751 | { | |
752 | /* When the SPU contexts are stored in a core file, BFD | |
aff410f1 MS |
753 | represents this with a fake section called |
754 | "SPU/<annex>". */ | |
efcbbd14 UW |
755 | |
756 | struct bfd_section *section; | |
757 | bfd_size_type size; | |
efcbbd14 | 758 | char sectionstr[100]; |
c5504eaf | 759 | |
efcbbd14 UW |
760 | xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex); |
761 | ||
762 | section = bfd_get_section_by_name (core_bfd, sectionstr); | |
763 | if (section == NULL) | |
764 | return -1; | |
765 | ||
766 | size = bfd_section_size (core_bfd, section); | |
767 | if (offset >= size) | |
768 | return 0; | |
769 | size -= offset; | |
770 | if (size > len) | |
771 | size = len; | |
772 | if (size > 0 | |
773 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
774 | (file_ptr) offset, size)) | |
775 | { | |
776 | warning (_("Couldn't read SPU section in core file.")); | |
777 | return -1; | |
778 | } | |
779 | ||
780 | return size; | |
781 | } | |
782 | else if (readbuf) | |
783 | { | |
784 | /* NULL annex requests list of all present spuids. */ | |
785 | struct spuid_list list; | |
c5504eaf | 786 | |
efcbbd14 UW |
787 | list.buf = readbuf; |
788 | list.offset = offset; | |
789 | list.len = len; | |
790 | list.pos = 0; | |
791 | list.written = 0; | |
792 | bfd_map_over_sections (core_bfd, add_to_spuid_list, &list); | |
793 | return list.written; | |
794 | } | |
795 | return -1; | |
796 | ||
e2544d02 RM |
797 | default: |
798 | if (ops->beneath != NULL) | |
aff410f1 MS |
799 | return ops->beneath->to_xfer_partial (ops->beneath, object, |
800 | annex, readbuf, | |
801 | writebuf, offset, len); | |
e2544d02 RM |
802 | return -1; |
803 | } | |
804 | } | |
805 | ||
c906108c SS |
806 | \f |
807 | /* If mourn is being called in all the right places, this could be say | |
aff410f1 MS |
808 | `gdb internal error' (since generic_mourn calls |
809 | breakpoint_init_inferior). */ | |
c906108c SS |
810 | |
811 | static int | |
a6d9a66e | 812 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
813 | { |
814 | return 0; | |
815 | } | |
816 | ||
817 | ||
818 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
819 | exactly lively, are they? On the other hand, if we don't claim | |
820 | that each & every one is alive, then we don't get any of them | |
821 | to appear in an "info thread" command, which is quite a useful | |
822 | behaviour. | |
c5aa993b | 823 | */ |
c906108c | 824 | static int |
28439f5e | 825 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
826 | { |
827 | return 1; | |
828 | } | |
829 | ||
4eb0ad19 DJ |
830 | /* Ask the current architecture what it knows about this core file. |
831 | That will be used, in turn, to pick a better architecture. This | |
832 | wrapper could be avoided if targets got a chance to specialize | |
833 | core_ops. */ | |
834 | ||
835 | static const struct target_desc * | |
836 | core_read_description (struct target_ops *target) | |
837 | { | |
a78c2d62 | 838 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
aff410f1 MS |
839 | return gdbarch_core_read_description (core_gdbarch, |
840 | target, core_bfd); | |
4eb0ad19 DJ |
841 | |
842 | return NULL; | |
843 | } | |
844 | ||
0de3b513 | 845 | static char * |
117de6a9 | 846 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
847 | { |
848 | static char buf[64]; | |
88f38a04 | 849 | struct inferior *inf; |
a5ee0f0c | 850 | int pid; |
0de3b513 | 851 | |
a5ee0f0c PA |
852 | /* The preferred way is to have a gdbarch/OS specific |
853 | implementation. */ | |
28439f5e PA |
854 | if (core_gdbarch |
855 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
a5ee0f0c | 856 | return gdbarch_core_pid_to_str (core_gdbarch, ptid); |
c5504eaf | 857 | |
a5ee0f0c PA |
858 | /* Otherwise, if we don't have one, we'll just fallback to |
859 | "process", with normal_pid_to_str. */ | |
28439f5e | 860 | |
a5ee0f0c PA |
861 | /* Try the LWPID field first. */ |
862 | pid = ptid_get_lwp (ptid); | |
863 | if (pid != 0) | |
864 | return normal_pid_to_str (pid_to_ptid (pid)); | |
865 | ||
866 | /* Otherwise, this isn't a "threaded" core -- use the PID field, but | |
867 | only if it isn't a fake PID. */ | |
88f38a04 PA |
868 | inf = find_inferior_pid (ptid_get_pid (ptid)); |
869 | if (inf != NULL && !inf->fake_pid_p) | |
a5ee0f0c | 870 | return normal_pid_to_str (ptid); |
0de3b513 | 871 | |
a5ee0f0c PA |
872 | /* No luck. We simply don't have a valid PID to print. */ |
873 | xsnprintf (buf, sizeof buf, "<main task>"); | |
0de3b513 PA |
874 | return buf; |
875 | } | |
876 | ||
c35b1492 PA |
877 | static int |
878 | core_has_memory (struct target_ops *ops) | |
879 | { | |
880 | return (core_bfd != NULL); | |
881 | } | |
882 | ||
883 | static int | |
884 | core_has_stack (struct target_ops *ops) | |
885 | { | |
886 | return (core_bfd != NULL); | |
887 | } | |
888 | ||
889 | static int | |
890 | core_has_registers (struct target_ops *ops) | |
891 | { | |
892 | return (core_bfd != NULL); | |
893 | } | |
894 | ||
c906108c SS |
895 | /* Fill in core_ops with its defined operations and properties. */ |
896 | ||
897 | static void | |
fba45db2 | 898 | init_core_ops (void) |
c906108c SS |
899 | { |
900 | core_ops.to_shortname = "core"; | |
901 | core_ops.to_longname = "Local core dump file"; | |
902 | core_ops.to_doc = | |
903 | "Use a core file as a target. Specify the filename of the core file."; | |
904 | core_ops.to_open = core_open; | |
905 | core_ops.to_close = core_close; | |
906 | core_ops.to_attach = find_default_attach; | |
c906108c | 907 | core_ops.to_detach = core_detach; |
c906108c | 908 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 909 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
910 | core_ops.to_files_info = core_files_info; |
911 | core_ops.to_insert_breakpoint = ignore; | |
912 | core_ops.to_remove_breakpoint = ignore; | |
913 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 914 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 915 | core_ops.to_read_description = core_read_description; |
0de3b513 | 916 | core_ops.to_pid_to_str = core_pid_to_str; |
c0edd9ed | 917 | core_ops.to_stratum = process_stratum; |
c35b1492 PA |
918 | core_ops.to_has_memory = core_has_memory; |
919 | core_ops.to_has_stack = core_has_stack; | |
920 | core_ops.to_has_registers = core_has_registers; | |
c5aa993b | 921 | core_ops.to_magic = OPS_MAGIC; |
c0edd9ed JK |
922 | |
923 | if (core_target) | |
924 | internal_error (__FILE__, __LINE__, | |
925 | _("init_core_ops: core target already exists (\"%s\")."), | |
926 | core_target->to_longname); | |
927 | core_target = &core_ops; | |
c906108c SS |
928 | } |
929 | ||
c906108c | 930 | void |
fba45db2 | 931 | _initialize_corelow (void) |
c906108c SS |
932 | { |
933 | init_core_ops (); | |
934 | ||
28439f5e | 935 | add_target (&core_ops); |
c906108c | 936 | } |