Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
0fb0cc75 | 4 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
961cb7b5 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
0e24ac5d | 23 | #include "arch-utils.h" |
c906108c SS |
24 | #include "gdb_string.h" |
25 | #include <errno.h> | |
26 | #include <signal.h> | |
27 | #include <fcntl.h> | |
fc24370e MS |
28 | #ifdef HAVE_SYS_FILE_H |
29 | #include <sys/file.h> /* needed for F_OK and friends */ | |
30 | #endif | |
c5aa993b | 31 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
32 | #include "inferior.h" |
33 | #include "symtab.h" | |
34 | #include "command.h" | |
35 | #include "bfd.h" | |
36 | #include "target.h" | |
37 | #include "gdbcore.h" | |
38 | #include "gdbthread.h" | |
4e052eda | 39 | #include "regcache.h" |
0e24ac5d | 40 | #include "regset.h" |
990f9fe3 | 41 | #include "symfile.h" |
4646aa9d | 42 | #include "exec.h" |
dbda9972 | 43 | #include "readline/readline.h" |
0e24ac5d | 44 | #include "gdb_assert.h" |
60250e8b | 45 | #include "exceptions.h" |
a77053c2 | 46 | #include "solib.h" |
f90c07ac | 47 | #include "filenames.h" |
0e24ac5d | 48 | |
8e860359 | 49 | |
ee28ca0f AC |
50 | #ifndef O_LARGEFILE |
51 | #define O_LARGEFILE 0 | |
52 | #endif | |
53 | ||
00e32a35 AC |
54 | /* List of all available core_fns. On gdb startup, each core file |
55 | register reader calls deprecated_add_core_fns() to register | |
56 | information on each core format it is prepared to read. */ | |
c906108c SS |
57 | |
58 | static struct core_fns *core_file_fns = NULL; | |
59 | ||
2acceee2 JM |
60 | /* The core_fns for a core file handler that is prepared to read the core |
61 | file currently open on core_bfd. */ | |
62 | ||
63 | static struct core_fns *core_vec = NULL; | |
64 | ||
0e24ac5d MK |
65 | /* FIXME: kettenis/20031023: Eventually this variable should |
66 | disappear. */ | |
67 | ||
68 | struct gdbarch *core_gdbarch = NULL; | |
69 | ||
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 | ||
a14ed312 | 78 | static void core_files_info (struct target_ops *); |
c906108c | 79 | |
a14ed312 | 80 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 81 | |
020cc13c | 82 | static int gdb_check_format (bfd *); |
2acceee2 | 83 | |
a14ed312 | 84 | static void core_open (char *, int); |
c906108c | 85 | |
136d6dae | 86 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 87 | |
a14ed312 | 88 | static void core_close (int); |
c906108c | 89 | |
74b7792f AC |
90 | static void core_close_cleanup (void *ignore); |
91 | ||
4efb68b1 | 92 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 93 | |
a14ed312 | 94 | static void init_core_ops (void); |
c906108c | 95 | |
a14ed312 | 96 | void _initialize_corelow (void); |
c906108c SS |
97 | |
98 | struct target_ops core_ops; | |
99 | ||
7f9f62ba PA |
100 | /* An arbitrary identifier for the core inferior. */ |
101 | #define CORELOW_PID 1 | |
102 | ||
c906108c SS |
103 | /* Link a new core_fns into the global core_file_fns list. Called on gdb |
104 | startup by the _initialize routine in each core file register reader, to | |
105 | register information about each format the the reader is prepared to | |
106 | handle. */ | |
107 | ||
108 | void | |
00e32a35 | 109 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 110 | { |
c5aa993b | 111 | cf->next = core_file_fns; |
c906108c SS |
112 | core_file_fns = cf; |
113 | } | |
114 | ||
2acceee2 JM |
115 | /* The default function that core file handlers can use to examine a |
116 | core file BFD and decide whether or not to accept the job of | |
117 | reading the core file. */ | |
118 | ||
119 | int | |
fba45db2 | 120 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
121 | { |
122 | int result; | |
123 | ||
124 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
125 | return (result); | |
126 | } | |
127 | ||
128 | /* Walk through the list of core functions to find a set that can | |
129 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 130 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
131 | selected. */ |
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 | ||
0e24ac5d MK |
140 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
141 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
142 | return NULL; | |
143 | ||
2acceee2 JM |
144 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
145 | { | |
146 | if (cf->core_sniffer (cf, abfd)) | |
147 | { | |
148 | yummy = cf; | |
149 | matches++; | |
150 | } | |
151 | } | |
152 | if (matches > 1) | |
153 | { | |
8a3fe4f8 | 154 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
155 | bfd_get_filename (abfd), matches); |
156 | } | |
157 | else if (matches == 0) | |
158 | { | |
8a3fe4f8 | 159 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
160 | bfd_get_filename (abfd)); |
161 | } | |
162 | if (yummy == NULL) | |
163 | { | |
164 | yummy = core_file_fns; | |
165 | } | |
166 | return (yummy); | |
167 | } | |
168 | ||
169 | /* The default is to reject every core file format we see. Either | |
170 | BFD has to recognize it, or we have to provide a function in the | |
171 | core file handler that recognizes it. */ | |
172 | ||
173 | int | |
fba45db2 | 174 | default_check_format (bfd *abfd) |
2acceee2 JM |
175 | { |
176 | return (0); | |
177 | } | |
178 | ||
179 | /* Attempt to recognize core file formats that BFD rejects. */ | |
180 | ||
020cc13c | 181 | static int |
fba45db2 | 182 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
183 | { |
184 | struct core_fns *cf; | |
185 | ||
186 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
187 | { | |
188 | if (cf->check_format (abfd)) | |
189 | { | |
81a9a963 | 190 | return (1); |
2acceee2 JM |
191 | } |
192 | } | |
81a9a963 | 193 | return (0); |
2acceee2 | 194 | } |
c906108c SS |
195 | |
196 | /* Discard all vestiges of any previous core file and mark data and stack | |
197 | spaces as empty. */ | |
198 | ||
c906108c | 199 | static void |
fba45db2 | 200 | core_close (int quitting) |
c906108c SS |
201 | { |
202 | char *name; | |
203 | ||
204 | if (core_bfd) | |
205 | { | |
959b8724 | 206 | int pid = ptid_get_pid (inferior_ptid); |
39f77062 | 207 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
959b8724 | 208 | delete_inferior_silent (pid); |
c906108c | 209 | |
7a292a7a | 210 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 211 | comments in clear_solib in solib.c. */ |
a77053c2 | 212 | clear_solib (); |
7a292a7a | 213 | |
07b82ea5 PA |
214 | xfree (core_data->sections); |
215 | xfree (core_data); | |
216 | core_data = NULL; | |
217 | ||
c906108c SS |
218 | name = bfd_get_filename (core_bfd); |
219 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 220 | warning (_("cannot close \"%s\": %s"), |
c906108c | 221 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 222 | xfree (name); |
c906108c | 223 | core_bfd = NULL; |
c906108c | 224 | } |
2acceee2 | 225 | core_vec = NULL; |
0e24ac5d | 226 | core_gdbarch = NULL; |
c906108c SS |
227 | } |
228 | ||
74b7792f AC |
229 | static void |
230 | core_close_cleanup (void *ignore) | |
231 | { | |
232 | core_close (0/*ignored*/); | |
233 | } | |
234 | ||
c906108c SS |
235 | /* Look for sections whose names start with `.reg/' so that we can extract the |
236 | list of threads in a core file. */ | |
237 | ||
238 | static void | |
4efb68b1 | 239 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 240 | { |
0de3b513 | 241 | ptid_t ptid; |
c906108c SS |
242 | int thread_id; |
243 | asection *reg_sect = (asection *) reg_sect_arg; | |
244 | ||
245 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
246 | return; | |
247 | ||
248 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
249 | ||
959b8724 PA |
250 | if (core_gdbarch |
251 | && gdbarch_core_reg_section_encodes_pid (core_gdbarch)) | |
252 | { | |
253 | uint32_t merged_pid = thread_id; | |
254 | ptid = ptid_build (merged_pid & 0xffff, | |
255 | merged_pid >> 16, 0); | |
256 | } | |
257 | else | |
258 | ptid = ptid_build (ptid_get_pid (inferior_ptid), thread_id, 0); | |
0de3b513 PA |
259 | |
260 | if (ptid_get_lwp (inferior_ptid) == 0) | |
261 | /* The main thread has already been added before getting here, and | |
262 | this is the first time we hear about a thread id. Assume this | |
263 | is the main thread. */ | |
264 | thread_change_ptid (inferior_ptid, ptid); | |
265 | else | |
266 | /* Nope, really a new thread. */ | |
267 | add_thread (ptid); | |
c906108c SS |
268 | |
269 | /* Warning, Will Robinson, looking at BFD private data! */ | |
270 | ||
271 | if (reg_sect != NULL | |
c5aa993b | 272 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
0de3b513 | 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; |
7f9f62ba | 288 | int corelow_pid = CORELOW_PID; |
c906108c SS |
289 | |
290 | target_preopen (from_tty); | |
291 | if (!filename) | |
292 | { | |
8a3fe4f8 AC |
293 | if (core_bfd) |
294 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
295 | else | |
296 | error (_("No core file specified.")); | |
c906108c SS |
297 | } |
298 | ||
299 | filename = tilde_expand (filename); | |
f90c07ac | 300 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 301 | { |
1754f103 | 302 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 303 | xfree (filename); |
c906108c SS |
304 | filename = temp; |
305 | } | |
306 | ||
b8c9b27d | 307 | old_chain = make_cleanup (xfree, filename); |
c906108c | 308 | |
ee28ca0f AC |
309 | flags = O_BINARY | O_LARGEFILE; |
310 | if (write_files) | |
311 | flags |= O_RDWR; | |
312 | else | |
313 | flags |= O_RDONLY; | |
314 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
315 | if (scratch_chan < 0) |
316 | perror_with_name (filename); | |
317 | ||
9f76c2cd MM |
318 | temp_bfd = bfd_fopen (filename, gnutarget, |
319 | write_files ? FOPEN_RUB : FOPEN_RB, | |
320 | scratch_chan); | |
c906108c SS |
321 | if (temp_bfd == NULL) |
322 | perror_with_name (filename); | |
323 | ||
2acceee2 JM |
324 | if (!bfd_check_format (temp_bfd, bfd_core) && |
325 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
326 | { |
327 | /* Do it after the err msg */ | |
328 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
329 | on error it does not free all the storage associated with the |
330 | bfd). */ | |
5c65bbb6 | 331 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 332 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
333 | filename, bfd_errmsg (bfd_get_error ())); |
334 | } | |
335 | ||
336 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
337 | ||
c5aa993b | 338 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
339 | unpush_target (&core_ops); |
340 | core_bfd = temp_bfd; | |
74b7792f | 341 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 342 | |
0e24ac5d MK |
343 | /* FIXME: kettenis/20031023: This is very dangerous. The |
344 | CORE_GDBARCH that results from this call may very well be | |
345 | different from CURRENT_GDBARCH. However, its methods may only | |
346 | work if it is selected as the current architecture, because they | |
347 | rely on swapped data (see gdbarch.c). We should get rid of that | |
348 | swapped data. */ | |
349 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
350 | ||
2acceee2 JM |
351 | /* Find a suitable core file handler to munch on core_bfd */ |
352 | core_vec = sniff_core_bfd (core_bfd); | |
353 | ||
c906108c SS |
354 | validate_files (); |
355 | ||
07b82ea5 PA |
356 | core_data = XZALLOC (struct target_section_table); |
357 | ||
c906108c | 358 | /* Find the data section */ |
07b82ea5 PA |
359 | if (build_section_table (core_bfd, |
360 | &core_data->sections, &core_data->sections_end)) | |
8a3fe4f8 | 361 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
362 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
363 | ||
2f1b5984 MK |
364 | /* If we have no exec file, try to set the architecture from the |
365 | core file. We don't do this unconditionally since an exec file | |
366 | typically contains more information that helps us determine the | |
367 | architecture than a core file. */ | |
368 | if (!exec_bfd) | |
369 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 370 | |
87ab71f0 | 371 | push_target (&core_ops); |
c906108c SS |
372 | discard_cleanups (old_chain); |
373 | ||
7f9f62ba PA |
374 | add_inferior_silent (corelow_pid); |
375 | ||
0de3b513 PA |
376 | /* Do this before acknowledging the inferior, so if |
377 | post_create_inferior throws (can happen easilly if you're loading | |
378 | a core file with the wrong exec), we aren't left with threads | |
379 | from the previous inferior. */ | |
380 | init_thread_list (); | |
381 | ||
382 | /* Set INFERIOR_PTID early, so an upper layer can rely on it being | |
383 | set while in the target_find_new_threads call below. */ | |
384 | inferior_ptid = pid_to_ptid (corelow_pid); | |
385 | ||
386 | /* Assume ST --- Add a main task. We'll later detect when we go | |
387 | from ST to MT. */ | |
388 | add_thread_silent (inferior_ptid); | |
389 | ||
739fc47a PA |
390 | /* Need to flush the register cache (and the frame cache) from a |
391 | previous debug session. If inferior_ptid ends up the same as the | |
392 | last debug session --- e.g., b foo; run; gcore core1; step; gcore | |
393 | core2; core core1; core core2 --- then there's potential for | |
394 | get_current_regcache to return the cached regcache of the | |
395 | previous session, and the frame cache being stale. */ | |
396 | registers_changed (); | |
397 | ||
0de3b513 PA |
398 | /* Build up thread list from BFD sections, and possibly set the |
399 | current thread to the .reg/NN section matching the .reg | |
400 | section. */ | |
401 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
402 | bfd_get_section_by_name (core_bfd, ".reg")); | |
403 | ||
959b8724 PA |
404 | post_create_inferior (&core_ops, from_tty); |
405 | ||
0de3b513 PA |
406 | /* Now go through the target stack looking for threads since there |
407 | may be a thread_stratum target loaded on top of target core by | |
408 | now. The layer above should claim threads found in the BFD | |
409 | sections. */ | |
410 | target_find_new_threads (); | |
411 | ||
c906108c SS |
412 | p = bfd_core_file_failing_command (core_bfd); |
413 | if (p) | |
a3f17187 | 414 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
415 | |
416 | siggy = bfd_core_file_failing_signal (core_bfd); | |
417 | if (siggy > 0) | |
8e6a3c35 | 418 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 419 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
420 | value is called ``target_signal'' and this function got the |
421 | name ..._from_host(). */ | |
a3f17187 | 422 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
1cded358 | 423 | target_signal_to_string ( |
b3ed98d2 AR |
424 | (core_gdbarch != NULL) ? |
425 | gdbarch_target_signal_from_host (core_gdbarch, siggy) | |
426 | : siggy)); | |
c906108c | 427 | |
87ab71f0 PA |
428 | /* Fetch all registers from core file. */ |
429 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 430 | |
87ab71f0 PA |
431 | /* Now, set up the frame cache, and print the top of stack. */ |
432 | reinit_frame_cache (); | |
433 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
434 | } |
435 | ||
436 | static void | |
136d6dae | 437 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
438 | { |
439 | if (args) | |
8a3fe4f8 | 440 | error (_("Too many arguments")); |
136d6dae | 441 | unpush_target (ops); |
c906108c SS |
442 | reinit_frame_cache (); |
443 | if (from_tty) | |
a3f17187 | 444 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
445 | } |
446 | ||
07b82ea5 PA |
447 | #ifdef DEPRECATED_IBM6000_TARGET |
448 | ||
449 | /* Resize the core memory's section table, by NUM_ADDED. Returns a | |
450 | pointer into the first new slot. This will not be necessary when | |
451 | the rs6000 target is converted to use the standard solib | |
452 | framework. */ | |
453 | ||
454 | struct target_section * | |
455 | deprecated_core_resize_section_table (int num_added) | |
456 | { | |
457 | int old_count; | |
458 | ||
459 | old_count = resize_section_table (core_data, num_added); | |
460 | return core_data->sections + old_count; | |
461 | } | |
462 | ||
463 | #endif | |
de57eccd JM |
464 | |
465 | /* Try to retrieve registers from a section in core_bfd, and supply | |
466 | them to core_vec->core_read_registers, as the register set numbered | |
467 | WHICH. | |
468 | ||
0de3b513 PA |
469 | If inferior_ptid's lwp member is zero, do the single-threaded |
470 | thing: look for a section named NAME. If inferior_ptid's lwp | |
471 | member is non-zero, do the multi-threaded thing: look for a section | |
472 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
473 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
474 | |
475 | HUMAN_NAME is a human-readable name for the kind of registers the | |
476 | NAME section contains, for use in error messages. | |
477 | ||
478 | If REQUIRED is non-zero, print an error if the core file doesn't | |
479 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
480 | ||
481 | static void | |
9eefc95f UW |
482 | get_core_register_section (struct regcache *regcache, |
483 | char *name, | |
de57eccd JM |
484 | int which, |
485 | char *human_name, | |
486 | int required) | |
487 | { | |
3ecda457 | 488 | static char *section_name = NULL; |
7be0c536 | 489 | struct bfd_section *section; |
de57eccd JM |
490 | bfd_size_type size; |
491 | char *contents; | |
492 | ||
3ecda457 | 493 | xfree (section_name); |
959b8724 PA |
494 | |
495 | if (core_gdbarch | |
496 | && gdbarch_core_reg_section_encodes_pid (core_gdbarch)) | |
497 | { | |
498 | uint32_t merged_pid; | |
499 | ||
500 | merged_pid = ptid_get_lwp (inferior_ptid); | |
501 | merged_pid = merged_pid << 16 | ptid_get_pid (inferior_ptid); | |
502 | ||
503 | section_name = xstrprintf ("%s/%s", name, plongest (merged_pid)); | |
504 | } | |
505 | else if (ptid_get_lwp (inferior_ptid)) | |
0de3b513 | 506 | section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid)); |
de57eccd | 507 | else |
3ecda457 | 508 | section_name = xstrdup (name); |
de57eccd JM |
509 | |
510 | section = bfd_get_section_by_name (core_bfd, section_name); | |
511 | if (! section) | |
512 | { | |
513 | if (required) | |
8a3fe4f8 | 514 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
515 | return; |
516 | } | |
517 | ||
518 | size = bfd_section_size (core_bfd, section); | |
519 | contents = alloca (size); | |
520 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
521 | (file_ptr) 0, size)) | |
522 | { | |
8a3fe4f8 | 523 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
524 | human_name, name); |
525 | return; | |
526 | } | |
527 | ||
0e24ac5d MK |
528 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
529 | { | |
530 | const struct regset *regset; | |
531 | ||
532 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
533 | if (regset == NULL) | |
534 | { | |
535 | if (required) | |
8a3fe4f8 | 536 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
537 | human_name); |
538 | return; | |
539 | } | |
540 | ||
9eefc95f | 541 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
542 | return; |
543 | } | |
544 | ||
545 | gdb_assert (core_vec); | |
9eefc95f | 546 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
547 | ((CORE_ADDR) |
548 | bfd_section_vma (core_bfd, section))); | |
549 | } | |
550 | ||
551 | ||
c906108c SS |
552 | /* Get the registers out of a core file. This is the machine- |
553 | independent part. Fetch_core_registers is the machine-dependent | |
554 | part, typically implemented in the xm-file for each architecture. */ | |
555 | ||
556 | /* We just get all the registers, so we don't use regno. */ | |
557 | ||
c906108c | 558 | static void |
28439f5e PA |
559 | get_core_registers (struct target_ops *ops, |
560 | struct regcache *regcache, int regno) | |
c906108c | 561 | { |
9c5ea4d9 | 562 | int i; |
c906108c | 563 | |
0e24ac5d MK |
564 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
565 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
566 | { |
567 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 568 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
569 | return; |
570 | } | |
571 | ||
56be3814 | 572 | get_core_register_section (regcache, |
9eefc95f | 573 | ".reg", 0, "general-purpose", 1); |
56be3814 | 574 | get_core_register_section (regcache, |
9eefc95f | 575 | ".reg2", 2, "floating-point", 0); |
56be3814 | 576 | get_core_register_section (regcache, |
9eefc95f | 577 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
578 | get_core_register_section (regcache, |
579 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
604c2f83 LM |
580 | get_core_register_section (regcache, |
581 | ".reg-ppc-vsx", 4, "POWER7 VSX", 0); | |
c906108c | 582 | |
9c5ea4d9 | 583 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 584 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
585 | if (!regcache_valid_p (regcache, i)) |
586 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
587 | } |
588 | ||
c906108c | 589 | static void |
fba45db2 | 590 | core_files_info (struct target_ops *t) |
c906108c | 591 | { |
07b82ea5 | 592 | print_section_info (core_data, core_bfd); |
c906108c | 593 | } |
e2544d02 RM |
594 | \f |
595 | static LONGEST | |
596 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
597 | const char *annex, gdb_byte *readbuf, |
598 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
599 | { |
600 | switch (object) | |
601 | { | |
602 | case TARGET_OBJECT_MEMORY: | |
07b82ea5 PA |
603 | return section_table_xfer_memory_partial (readbuf, writebuf, |
604 | offset, len, | |
605 | core_data->sections, | |
606 | core_data->sections_end, | |
607 | NULL); | |
e2544d02 RM |
608 | |
609 | case TARGET_OBJECT_AUXV: | |
610 | if (readbuf) | |
611 | { | |
612 | /* When the aux vector is stored in core file, BFD | |
613 | represents this with a fake section called ".auxv". */ | |
614 | ||
c4c5b7ba | 615 | struct bfd_section *section; |
e2544d02 RM |
616 | bfd_size_type size; |
617 | char *contents; | |
618 | ||
619 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
620 | if (section == NULL) | |
621 | return -1; | |
622 | ||
623 | size = bfd_section_size (core_bfd, section); | |
624 | if (offset >= size) | |
625 | return 0; | |
626 | size -= offset; | |
627 | if (size > len) | |
628 | size = len; | |
403e1656 MK |
629 | if (size > 0 |
630 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
631 | (file_ptr) offset, size)) | |
e2544d02 | 632 | { |
8a3fe4f8 | 633 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
634 | return -1; |
635 | } | |
636 | ||
637 | return size; | |
638 | } | |
639 | return -1; | |
640 | ||
403e1656 MK |
641 | case TARGET_OBJECT_WCOOKIE: |
642 | if (readbuf) | |
643 | { | |
644 | /* When the StackGhost cookie is stored in core file, BFD | |
645 | represents this with a fake section called ".wcookie". */ | |
646 | ||
647 | struct bfd_section *section; | |
648 | bfd_size_type size; | |
649 | char *contents; | |
650 | ||
651 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
652 | if (section == NULL) | |
653 | return -1; | |
654 | ||
655 | size = bfd_section_size (core_bfd, section); | |
656 | if (offset >= size) | |
657 | return 0; | |
658 | size -= offset; | |
659 | if (size > len) | |
660 | size = len; | |
661 | if (size > 0 | |
662 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
663 | (file_ptr) offset, size)) | |
664 | { | |
8a3fe4f8 | 665 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
666 | return -1; |
667 | } | |
668 | ||
669 | return size; | |
670 | } | |
671 | return -1; | |
672 | ||
de584861 PA |
673 | case TARGET_OBJECT_LIBRARIES: |
674 | if (core_gdbarch | |
675 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
676 | { | |
677 | if (writebuf) | |
678 | return -1; | |
679 | return | |
680 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
681 | readbuf, offset, len); | |
682 | } | |
683 | /* FALL THROUGH */ | |
684 | ||
e2544d02 RM |
685 | default: |
686 | if (ops->beneath != NULL) | |
687 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
688 | readbuf, writebuf, offset, len); | |
689 | return -1; | |
690 | } | |
691 | } | |
692 | ||
c906108c SS |
693 | \f |
694 | /* If mourn is being called in all the right places, this could be say | |
695 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
696 | ||
697 | static int | |
a6d9a66e | 698 | ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt) |
c906108c SS |
699 | { |
700 | return 0; | |
701 | } | |
702 | ||
703 | ||
704 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
705 | exactly lively, are they? On the other hand, if we don't claim | |
706 | that each & every one is alive, then we don't get any of them | |
707 | to appear in an "info thread" command, which is quite a useful | |
708 | behaviour. | |
c5aa993b | 709 | */ |
c906108c | 710 | static int |
28439f5e | 711 | core_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c SS |
712 | { |
713 | return 1; | |
714 | } | |
715 | ||
4eb0ad19 DJ |
716 | /* Ask the current architecture what it knows about this core file. |
717 | That will be used, in turn, to pick a better architecture. This | |
718 | wrapper could be avoided if targets got a chance to specialize | |
719 | core_ops. */ | |
720 | ||
721 | static const struct target_desc * | |
722 | core_read_description (struct target_ops *target) | |
723 | { | |
a78c2d62 UW |
724 | if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch)) |
725 | return gdbarch_core_read_description (core_gdbarch, target, core_bfd); | |
4eb0ad19 DJ |
726 | |
727 | return NULL; | |
728 | } | |
729 | ||
0de3b513 | 730 | static char * |
117de6a9 | 731 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
732 | { |
733 | static char buf[64]; | |
734 | ||
28439f5e PA |
735 | if (core_gdbarch |
736 | && gdbarch_core_pid_to_str_p (core_gdbarch)) | |
737 | { | |
738 | char *ret = gdbarch_core_pid_to_str (core_gdbarch, ptid); | |
739 | if (ret != NULL) | |
740 | return ret; | |
741 | } | |
742 | ||
0de3b513 PA |
743 | if (ptid_get_lwp (ptid) == 0) |
744 | xsnprintf (buf, sizeof buf, "<main task>"); | |
745 | else | |
746 | xsnprintf (buf, sizeof buf, "Thread %ld", ptid_get_lwp (ptid)); | |
747 | ||
748 | return buf; | |
749 | } | |
750 | ||
c35b1492 PA |
751 | static int |
752 | core_has_memory (struct target_ops *ops) | |
753 | { | |
754 | return (core_bfd != NULL); | |
755 | } | |
756 | ||
757 | static int | |
758 | core_has_stack (struct target_ops *ops) | |
759 | { | |
760 | return (core_bfd != NULL); | |
761 | } | |
762 | ||
763 | static int | |
764 | core_has_registers (struct target_ops *ops) | |
765 | { | |
766 | return (core_bfd != NULL); | |
767 | } | |
768 | ||
c906108c SS |
769 | /* Fill in core_ops with its defined operations and properties. */ |
770 | ||
771 | static void | |
fba45db2 | 772 | init_core_ops (void) |
c906108c SS |
773 | { |
774 | core_ops.to_shortname = "core"; | |
775 | core_ops.to_longname = "Local core dump file"; | |
776 | core_ops.to_doc = | |
777 | "Use a core file as a target. Specify the filename of the core file."; | |
778 | core_ops.to_open = core_open; | |
779 | core_ops.to_close = core_close; | |
780 | core_ops.to_attach = find_default_attach; | |
c906108c | 781 | core_ops.to_detach = core_detach; |
c906108c | 782 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 783 | core_ops.to_xfer_partial = core_xfer_partial; |
c906108c SS |
784 | core_ops.to_files_info = core_files_info; |
785 | core_ops.to_insert_breakpoint = ignore; | |
786 | core_ops.to_remove_breakpoint = ignore; | |
787 | core_ops.to_create_inferior = find_default_create_inferior; | |
28439f5e | 788 | core_ops.to_thread_alive = core_thread_alive; |
4eb0ad19 | 789 | core_ops.to_read_description = core_read_description; |
0de3b513 | 790 | core_ops.to_pid_to_str = core_pid_to_str; |
c906108c | 791 | core_ops.to_stratum = core_stratum; |
c35b1492 PA |
792 | core_ops.to_has_memory = core_has_memory; |
793 | core_ops.to_has_stack = core_has_stack; | |
794 | core_ops.to_has_registers = core_has_registers; | |
c5aa993b | 795 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
796 | } |
797 | ||
c906108c | 798 | void |
fba45db2 | 799 | _initialize_corelow (void) |
c906108c SS |
800 | { |
801 | init_core_ops (); | |
802 | ||
28439f5e | 803 | add_target (&core_ops); |
c906108c | 804 | } |