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 | ||
a14ed312 | 70 | static void core_files_info (struct target_ops *); |
c906108c | 71 | |
a14ed312 | 72 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 73 | |
020cc13c | 74 | static int gdb_check_format (bfd *); |
2acceee2 | 75 | |
a14ed312 | 76 | static void core_open (char *, int); |
c906108c | 77 | |
136d6dae | 78 | static void core_detach (struct target_ops *ops, char *, int); |
c906108c | 79 | |
a14ed312 | 80 | static void core_close (int); |
c906108c | 81 | |
74b7792f AC |
82 | static void core_close_cleanup (void *ignore); |
83 | ||
56be3814 | 84 | static void get_core_registers (struct regcache *, int); |
c906108c | 85 | |
4efb68b1 | 86 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 87 | |
39f77062 | 88 | static int core_file_thread_alive (ptid_t tid); |
c906108c | 89 | |
a14ed312 | 90 | static void init_core_ops (void); |
c906108c | 91 | |
a14ed312 | 92 | void _initialize_corelow (void); |
c906108c SS |
93 | |
94 | struct target_ops core_ops; | |
95 | ||
7f9f62ba PA |
96 | /* An arbitrary identifier for the core inferior. */ |
97 | #define CORELOW_PID 1 | |
98 | ||
c906108c SS |
99 | /* Link a new core_fns into the global core_file_fns list. Called on gdb |
100 | startup by the _initialize routine in each core file register reader, to | |
101 | register information about each format the the reader is prepared to | |
102 | handle. */ | |
103 | ||
104 | void | |
00e32a35 | 105 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 106 | { |
c5aa993b | 107 | cf->next = core_file_fns; |
c906108c SS |
108 | core_file_fns = cf; |
109 | } | |
110 | ||
2acceee2 JM |
111 | /* The default function that core file handlers can use to examine a |
112 | core file BFD and decide whether or not to accept the job of | |
113 | reading the core file. */ | |
114 | ||
115 | int | |
fba45db2 | 116 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
117 | { |
118 | int result; | |
119 | ||
120 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
121 | return (result); | |
122 | } | |
123 | ||
124 | /* Walk through the list of core functions to find a set that can | |
125 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 126 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
127 | selected. */ |
128 | ||
129 | static struct core_fns * | |
fba45db2 | 130 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
131 | { |
132 | struct core_fns *cf; | |
133 | struct core_fns *yummy = NULL; | |
134 | int matches = 0;; | |
135 | ||
0e24ac5d MK |
136 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
137 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
138 | return NULL; | |
139 | ||
2acceee2 JM |
140 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
141 | { | |
142 | if (cf->core_sniffer (cf, abfd)) | |
143 | { | |
144 | yummy = cf; | |
145 | matches++; | |
146 | } | |
147 | } | |
148 | if (matches > 1) | |
149 | { | |
8a3fe4f8 | 150 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
151 | bfd_get_filename (abfd), matches); |
152 | } | |
153 | else if (matches == 0) | |
154 | { | |
8a3fe4f8 | 155 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
156 | bfd_get_filename (abfd)); |
157 | } | |
158 | if (yummy == NULL) | |
159 | { | |
160 | yummy = core_file_fns; | |
161 | } | |
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 | |
167 | core file handler that recognizes it. */ | |
168 | ||
169 | int | |
fba45db2 | 170 | default_check_format (bfd *abfd) |
2acceee2 JM |
171 | { |
172 | return (0); | |
173 | } | |
174 | ||
175 | /* Attempt to recognize core file formats that BFD rejects. */ | |
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 SS |
191 | |
192 | /* Discard all vestiges of any previous core file and mark data and stack | |
193 | spaces as empty. */ | |
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); |
39f77062 | 203 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
959b8724 | 204 | delete_inferior_silent (pid); |
c906108c | 205 | |
7a292a7a | 206 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 207 | comments in clear_solib in solib.c. */ |
a77053c2 | 208 | clear_solib (); |
7a292a7a | 209 | |
c906108c SS |
210 | name = bfd_get_filename (core_bfd); |
211 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 212 | warning (_("cannot close \"%s\": %s"), |
c906108c | 213 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 214 | xfree (name); |
c906108c | 215 | core_bfd = NULL; |
c906108c SS |
216 | if (core_ops.to_sections) |
217 | { | |
b8c9b27d | 218 | xfree (core_ops.to_sections); |
c906108c SS |
219 | core_ops.to_sections = NULL; |
220 | core_ops.to_sections_end = NULL; | |
221 | } | |
222 | } | |
2acceee2 | 223 | core_vec = NULL; |
0e24ac5d | 224 | core_gdbarch = NULL; |
c906108c SS |
225 | } |
226 | ||
74b7792f AC |
227 | static void |
228 | core_close_cleanup (void *ignore) | |
229 | { | |
230 | core_close (0/*ignored*/); | |
231 | } | |
232 | ||
c906108c SS |
233 | /* Look for sections whose names start with `.reg/' so that we can extract the |
234 | list of threads in a core file. */ | |
235 | ||
236 | static void | |
4efb68b1 | 237 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c | 238 | { |
0de3b513 | 239 | ptid_t ptid; |
c906108c SS |
240 | int thread_id; |
241 | asection *reg_sect = (asection *) reg_sect_arg; | |
242 | ||
243 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
244 | return; | |
245 | ||
246 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
247 | ||
959b8724 PA |
248 | if (core_gdbarch |
249 | && gdbarch_core_reg_section_encodes_pid (core_gdbarch)) | |
250 | { | |
251 | uint32_t merged_pid = thread_id; | |
252 | ptid = ptid_build (merged_pid & 0xffff, | |
253 | merged_pid >> 16, 0); | |
254 | } | |
255 | else | |
256 | ptid = ptid_build (ptid_get_pid (inferior_ptid), thread_id, 0); | |
0de3b513 PA |
257 | |
258 | if (ptid_get_lwp (inferior_ptid) == 0) | |
259 | /* The main thread has already been added before getting here, and | |
260 | this is the first time we hear about a thread id. Assume this | |
261 | is the main thread. */ | |
262 | thread_change_ptid (inferior_ptid, ptid); | |
263 | else | |
264 | /* Nope, really a new thread. */ | |
265 | add_thread (ptid); | |
c906108c SS |
266 | |
267 | /* Warning, Will Robinson, looking at BFD private data! */ | |
268 | ||
269 | if (reg_sect != NULL | |
c5aa993b | 270 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
0de3b513 | 271 | inferior_ptid = ptid; /* Yes, make it current */ |
c906108c SS |
272 | } |
273 | ||
274 | /* This routine opens and sets up the core file bfd. */ | |
275 | ||
276 | static void | |
fba45db2 | 277 | core_open (char *filename, int from_tty) |
c906108c SS |
278 | { |
279 | const char *p; | |
280 | int siggy; | |
281 | struct cleanup *old_chain; | |
282 | char *temp; | |
283 | bfd *temp_bfd; | |
c906108c | 284 | int scratch_chan; |
ee28ca0f | 285 | int flags; |
7f9f62ba | 286 | int corelow_pid = CORELOW_PID; |
c906108c SS |
287 | |
288 | target_preopen (from_tty); | |
289 | if (!filename) | |
290 | { | |
8a3fe4f8 AC |
291 | if (core_bfd) |
292 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
293 | else | |
294 | error (_("No core file specified.")); | |
c906108c SS |
295 | } |
296 | ||
297 | filename = tilde_expand (filename); | |
f90c07ac | 298 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 299 | { |
1754f103 | 300 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 301 | xfree (filename); |
c906108c SS |
302 | filename = temp; |
303 | } | |
304 | ||
b8c9b27d | 305 | old_chain = make_cleanup (xfree, filename); |
c906108c | 306 | |
ee28ca0f AC |
307 | flags = O_BINARY | O_LARGEFILE; |
308 | if (write_files) | |
309 | flags |= O_RDWR; | |
310 | else | |
311 | flags |= O_RDONLY; | |
312 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
313 | if (scratch_chan < 0) |
314 | perror_with_name (filename); | |
315 | ||
9f76c2cd MM |
316 | temp_bfd = bfd_fopen (filename, gnutarget, |
317 | write_files ? FOPEN_RUB : FOPEN_RB, | |
318 | scratch_chan); | |
c906108c SS |
319 | if (temp_bfd == NULL) |
320 | perror_with_name (filename); | |
321 | ||
2acceee2 JM |
322 | if (!bfd_check_format (temp_bfd, bfd_core) && |
323 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
324 | { |
325 | /* Do it after the err msg */ | |
326 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
327 | on error it does not free all the storage associated with the |
328 | bfd). */ | |
5c65bbb6 | 329 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 330 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
331 | filename, bfd_errmsg (bfd_get_error ())); |
332 | } | |
333 | ||
334 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
335 | ||
c5aa993b | 336 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
337 | unpush_target (&core_ops); |
338 | core_bfd = temp_bfd; | |
74b7792f | 339 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 340 | |
0e24ac5d MK |
341 | /* FIXME: kettenis/20031023: This is very dangerous. The |
342 | CORE_GDBARCH that results from this call may very well be | |
343 | different from CURRENT_GDBARCH. However, its methods may only | |
344 | work if it is selected as the current architecture, because they | |
345 | rely on swapped data (see gdbarch.c). We should get rid of that | |
346 | swapped data. */ | |
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 | ||
354 | /* Find the data section */ | |
355 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
356 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 357 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
358 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
359 | ||
2f1b5984 MK |
360 | /* If we have no exec file, try to set the architecture from the |
361 | core file. We don't do this unconditionally since an exec file | |
362 | typically contains more information that helps us determine the | |
363 | architecture than a core file. */ | |
364 | if (!exec_bfd) | |
365 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 366 | |
87ab71f0 | 367 | push_target (&core_ops); |
c906108c SS |
368 | discard_cleanups (old_chain); |
369 | ||
7f9f62ba PA |
370 | add_inferior_silent (corelow_pid); |
371 | ||
0de3b513 PA |
372 | /* Do this before acknowledging the inferior, so if |
373 | post_create_inferior throws (can happen easilly if you're loading | |
374 | a core file with the wrong exec), we aren't left with threads | |
375 | from the previous inferior. */ | |
376 | init_thread_list (); | |
377 | ||
378 | /* Set INFERIOR_PTID early, so an upper layer can rely on it being | |
379 | set while in the target_find_new_threads call below. */ | |
380 | inferior_ptid = pid_to_ptid (corelow_pid); | |
381 | ||
382 | /* Assume ST --- Add a main task. We'll later detect when we go | |
383 | from ST to MT. */ | |
384 | add_thread_silent (inferior_ptid); | |
385 | ||
0de3b513 PA |
386 | /* Build up thread list from BFD sections, and possibly set the |
387 | current thread to the .reg/NN section matching the .reg | |
388 | section. */ | |
389 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
390 | bfd_get_section_by_name (core_bfd, ".reg")); | |
391 | ||
959b8724 PA |
392 | post_create_inferior (&core_ops, from_tty); |
393 | ||
0de3b513 PA |
394 | /* Now go through the target stack looking for threads since there |
395 | may be a thread_stratum target loaded on top of target core by | |
396 | now. The layer above should claim threads found in the BFD | |
397 | sections. */ | |
398 | target_find_new_threads (); | |
399 | ||
c906108c SS |
400 | p = bfd_core_file_failing_command (core_bfd); |
401 | if (p) | |
a3f17187 | 402 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
403 | |
404 | siggy = bfd_core_file_failing_signal (core_bfd); | |
405 | if (siggy > 0) | |
8e6a3c35 | 406 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 407 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
408 | value is called ``target_signal'' and this function got the |
409 | name ..._from_host(). */ | |
a3f17187 | 410 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
1cded358 AR |
411 | target_signal_to_string ( |
412 | gdbarch_target_signal_from_host (core_gdbarch, siggy))); | |
c906108c | 413 | |
87ab71f0 PA |
414 | /* Fetch all registers from core file. */ |
415 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 416 | |
87ab71f0 PA |
417 | /* Now, set up the frame cache, and print the top of stack. */ |
418 | reinit_frame_cache (); | |
419 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
420 | } |
421 | ||
422 | static void | |
136d6dae | 423 | core_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
424 | { |
425 | if (args) | |
8a3fe4f8 | 426 | error (_("Too many arguments")); |
136d6dae | 427 | unpush_target (ops); |
c906108c SS |
428 | reinit_frame_cache (); |
429 | if (from_tty) | |
a3f17187 | 430 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
431 | } |
432 | ||
de57eccd JM |
433 | |
434 | /* Try to retrieve registers from a section in core_bfd, and supply | |
435 | them to core_vec->core_read_registers, as the register set numbered | |
436 | WHICH. | |
437 | ||
0de3b513 PA |
438 | If inferior_ptid's lwp member is zero, do the single-threaded |
439 | thing: look for a section named NAME. If inferior_ptid's lwp | |
440 | member is non-zero, do the multi-threaded thing: look for a section | |
441 | named "NAME/LWP", where LWP is the shortest ASCII decimal | |
442 | representation of inferior_ptid's lwp member. | |
de57eccd JM |
443 | |
444 | HUMAN_NAME is a human-readable name for the kind of registers the | |
445 | NAME section contains, for use in error messages. | |
446 | ||
447 | If REQUIRED is non-zero, print an error if the core file doesn't | |
448 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
449 | ||
450 | static void | |
9eefc95f UW |
451 | get_core_register_section (struct regcache *regcache, |
452 | char *name, | |
de57eccd JM |
453 | int which, |
454 | char *human_name, | |
455 | int required) | |
456 | { | |
3ecda457 | 457 | static char *section_name = NULL; |
7be0c536 | 458 | struct bfd_section *section; |
de57eccd JM |
459 | bfd_size_type size; |
460 | char *contents; | |
461 | ||
3ecda457 | 462 | xfree (section_name); |
959b8724 PA |
463 | |
464 | if (core_gdbarch | |
465 | && gdbarch_core_reg_section_encodes_pid (core_gdbarch)) | |
466 | { | |
467 | uint32_t merged_pid; | |
468 | ||
469 | merged_pid = ptid_get_lwp (inferior_ptid); | |
470 | merged_pid = merged_pid << 16 | ptid_get_pid (inferior_ptid); | |
471 | ||
472 | section_name = xstrprintf ("%s/%s", name, plongest (merged_pid)); | |
473 | } | |
474 | else if (ptid_get_lwp (inferior_ptid)) | |
0de3b513 | 475 | section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid)); |
de57eccd | 476 | else |
3ecda457 | 477 | section_name = xstrdup (name); |
de57eccd JM |
478 | |
479 | section = bfd_get_section_by_name (core_bfd, section_name); | |
480 | if (! section) | |
481 | { | |
482 | if (required) | |
8a3fe4f8 | 483 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
484 | return; |
485 | } | |
486 | ||
487 | size = bfd_section_size (core_bfd, section); | |
488 | contents = alloca (size); | |
489 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
490 | (file_ptr) 0, size)) | |
491 | { | |
8a3fe4f8 | 492 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
493 | human_name, name); |
494 | return; | |
495 | } | |
496 | ||
0e24ac5d MK |
497 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
498 | { | |
499 | const struct regset *regset; | |
500 | ||
501 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
502 | if (regset == NULL) | |
503 | { | |
504 | if (required) | |
8a3fe4f8 | 505 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
506 | human_name); |
507 | return; | |
508 | } | |
509 | ||
9eefc95f | 510 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
511 | return; |
512 | } | |
513 | ||
514 | gdb_assert (core_vec); | |
9eefc95f | 515 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
516 | ((CORE_ADDR) |
517 | bfd_section_vma (core_bfd, section))); | |
518 | } | |
519 | ||
520 | ||
c906108c SS |
521 | /* Get the registers out of a core file. This is the machine- |
522 | independent part. Fetch_core_registers is the machine-dependent | |
523 | part, typically implemented in the xm-file for each architecture. */ | |
524 | ||
525 | /* We just get all the registers, so we don't use regno. */ | |
526 | ||
c906108c | 527 | static void |
56be3814 | 528 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 529 | { |
9c5ea4d9 | 530 | int i; |
c906108c | 531 | |
0e24ac5d MK |
532 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
533 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
534 | { |
535 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 536 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
537 | return; |
538 | } | |
539 | ||
56be3814 | 540 | get_core_register_section (regcache, |
9eefc95f | 541 | ".reg", 0, "general-purpose", 1); |
56be3814 | 542 | get_core_register_section (regcache, |
9eefc95f | 543 | ".reg2", 2, "floating-point", 0); |
56be3814 | 544 | get_core_register_section (regcache, |
9eefc95f | 545 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
546 | get_core_register_section (regcache, |
547 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
604c2f83 LM |
548 | get_core_register_section (regcache, |
549 | ".reg-ppc-vsx", 4, "POWER7 VSX", 0); | |
c906108c | 550 | |
9c5ea4d9 | 551 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 552 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
553 | if (!regcache_valid_p (regcache, i)) |
554 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
555 | } |
556 | ||
c906108c | 557 | static void |
fba45db2 | 558 | core_files_info (struct target_ops *t) |
c906108c SS |
559 | { |
560 | print_section_info (t, core_bfd); | |
561 | } | |
e2544d02 RM |
562 | \f |
563 | static LONGEST | |
564 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
565 | const char *annex, gdb_byte *readbuf, |
566 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
567 | { |
568 | switch (object) | |
569 | { | |
570 | case TARGET_OBJECT_MEMORY: | |
571 | if (readbuf) | |
7160c4c3 | 572 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
662fb31b | 573 | len, 0/*read*/, NULL, ops); |
e2544d02 | 574 | if (writebuf) |
7160c4c3 PA |
575 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
576 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
577 | return -1; |
578 | ||
579 | case TARGET_OBJECT_AUXV: | |
580 | if (readbuf) | |
581 | { | |
582 | /* When the aux vector is stored in core file, BFD | |
583 | represents this with a fake section called ".auxv". */ | |
584 | ||
c4c5b7ba | 585 | struct bfd_section *section; |
e2544d02 RM |
586 | bfd_size_type size; |
587 | char *contents; | |
588 | ||
589 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
590 | if (section == NULL) | |
591 | return -1; | |
592 | ||
593 | size = bfd_section_size (core_bfd, section); | |
594 | if (offset >= size) | |
595 | return 0; | |
596 | size -= offset; | |
597 | if (size > len) | |
598 | size = len; | |
403e1656 MK |
599 | if (size > 0 |
600 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
601 | (file_ptr) offset, size)) | |
e2544d02 | 602 | { |
8a3fe4f8 | 603 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
604 | return -1; |
605 | } | |
606 | ||
607 | return size; | |
608 | } | |
609 | return -1; | |
610 | ||
403e1656 MK |
611 | case TARGET_OBJECT_WCOOKIE: |
612 | if (readbuf) | |
613 | { | |
614 | /* When the StackGhost cookie is stored in core file, BFD | |
615 | represents this with a fake section called ".wcookie". */ | |
616 | ||
617 | struct bfd_section *section; | |
618 | bfd_size_type size; | |
619 | char *contents; | |
620 | ||
621 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
622 | if (section == NULL) | |
623 | return -1; | |
624 | ||
625 | size = bfd_section_size (core_bfd, section); | |
626 | if (offset >= size) | |
627 | return 0; | |
628 | size -= offset; | |
629 | if (size > len) | |
630 | size = len; | |
631 | if (size > 0 | |
632 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
633 | (file_ptr) offset, size)) | |
634 | { | |
8a3fe4f8 | 635 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
636 | return -1; |
637 | } | |
638 | ||
639 | return size; | |
640 | } | |
641 | return -1; | |
642 | ||
de584861 PA |
643 | case TARGET_OBJECT_LIBRARIES: |
644 | if (core_gdbarch | |
645 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
646 | { | |
647 | if (writebuf) | |
648 | return -1; | |
649 | return | |
650 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
651 | readbuf, offset, len); | |
652 | } | |
653 | /* FALL THROUGH */ | |
654 | ||
e2544d02 RM |
655 | default: |
656 | if (ops->beneath != NULL) | |
657 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
658 | readbuf, writebuf, offset, len); | |
659 | return -1; | |
660 | } | |
661 | } | |
662 | ||
c906108c SS |
663 | \f |
664 | /* If mourn is being called in all the right places, this could be say | |
665 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
666 | ||
667 | static int | |
8181d85f | 668 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
669 | { |
670 | return 0; | |
671 | } | |
672 | ||
673 | ||
674 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
675 | exactly lively, are they? On the other hand, if we don't claim | |
676 | that each & every one is alive, then we don't get any of them | |
677 | to appear in an "info thread" command, which is quite a useful | |
678 | behaviour. | |
c5aa993b | 679 | */ |
c906108c | 680 | static int |
39f77062 | 681 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
682 | { |
683 | return 1; | |
684 | } | |
685 | ||
4eb0ad19 DJ |
686 | /* Ask the current architecture what it knows about this core file. |
687 | That will be used, in turn, to pick a better architecture. This | |
688 | wrapper could be avoided if targets got a chance to specialize | |
689 | core_ops. */ | |
690 | ||
691 | static const struct target_desc * | |
692 | core_read_description (struct target_ops *target) | |
693 | { | |
694 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
695 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
696 | ||
697 | return NULL; | |
698 | } | |
699 | ||
0de3b513 | 700 | static char * |
117de6a9 | 701 | core_pid_to_str (struct target_ops *ops, ptid_t ptid) |
0de3b513 PA |
702 | { |
703 | static char buf[64]; | |
704 | ||
705 | if (ptid_get_lwp (ptid) == 0) | |
706 | xsnprintf (buf, sizeof buf, "<main task>"); | |
707 | else | |
708 | xsnprintf (buf, sizeof buf, "Thread %ld", ptid_get_lwp (ptid)); | |
709 | ||
710 | return buf; | |
711 | } | |
712 | ||
c906108c SS |
713 | /* Fill in core_ops with its defined operations and properties. */ |
714 | ||
715 | static void | |
fba45db2 | 716 | init_core_ops (void) |
c906108c SS |
717 | { |
718 | core_ops.to_shortname = "core"; | |
719 | core_ops.to_longname = "Local core dump file"; | |
720 | core_ops.to_doc = | |
721 | "Use a core file as a target. Specify the filename of the core file."; | |
722 | core_ops.to_open = core_open; | |
723 | core_ops.to_close = core_close; | |
724 | core_ops.to_attach = find_default_attach; | |
c906108c | 725 | core_ops.to_detach = core_detach; |
c906108c | 726 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 727 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 728 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
729 | core_ops.to_files_info = core_files_info; |
730 | core_ops.to_insert_breakpoint = ignore; | |
731 | core_ops.to_remove_breakpoint = ignore; | |
732 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 733 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 734 | core_ops.to_read_description = core_read_description; |
0de3b513 | 735 | core_ops.to_pid_to_str = core_pid_to_str; |
c906108c SS |
736 | core_ops.to_stratum = core_stratum; |
737 | core_ops.to_has_memory = 1; | |
738 | core_ops.to_has_stack = 1; | |
739 | core_ops.to_has_registers = 1; | |
c5aa993b | 740 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
741 | } |
742 | ||
743 | /* non-zero if we should not do the add_target call in | |
744 | _initialize_corelow; not initialized (i.e., bss) so that | |
745 | the target can initialize it (i.e., data) if appropriate. | |
746 | This needs to be set at compile time because we don't know | |
747 | for sure whether the target's initialize routine is called | |
748 | before us or after us. */ | |
749 | int coreops_suppress_target; | |
750 | ||
751 | void | |
fba45db2 | 752 | _initialize_corelow (void) |
c906108c SS |
753 | { |
754 | init_core_ops (); | |
755 | ||
756 | if (!coreops_suppress_target) | |
757 | add_target (&core_ops); | |
758 | } |