Commit | Line | Data |
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c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
4 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007 | |
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" |
0e24ac5d | 47 | |
8e860359 | 48 | |
ee28ca0f AC |
49 | #ifndef O_LARGEFILE |
50 | #define O_LARGEFILE 0 | |
51 | #endif | |
52 | ||
00e32a35 AC |
53 | /* List of all available core_fns. On gdb startup, each core file |
54 | register reader calls deprecated_add_core_fns() to register | |
55 | information on each core format it is prepared to read. */ | |
c906108c SS |
56 | |
57 | static struct core_fns *core_file_fns = NULL; | |
58 | ||
2acceee2 JM |
59 | /* The core_fns for a core file handler that is prepared to read the core |
60 | file currently open on core_bfd. */ | |
61 | ||
62 | static struct core_fns *core_vec = NULL; | |
63 | ||
0e24ac5d MK |
64 | /* FIXME: kettenis/20031023: Eventually this variable should |
65 | disappear. */ | |
66 | ||
67 | struct gdbarch *core_gdbarch = NULL; | |
68 | ||
a14ed312 | 69 | static void core_files_info (struct target_ops *); |
c906108c | 70 | |
a14ed312 | 71 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 72 | |
020cc13c | 73 | static int gdb_check_format (bfd *); |
2acceee2 | 74 | |
a14ed312 | 75 | static void core_open (char *, int); |
c906108c | 76 | |
a14ed312 | 77 | static void core_detach (char *, int); |
c906108c | 78 | |
a14ed312 | 79 | static void core_close (int); |
c906108c | 80 | |
74b7792f AC |
81 | static void core_close_cleanup (void *ignore); |
82 | ||
56be3814 | 83 | static void get_core_registers (struct regcache *, int); |
c906108c | 84 | |
4efb68b1 | 85 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 86 | |
39f77062 | 87 | static int core_file_thread_alive (ptid_t tid); |
c906108c | 88 | |
a14ed312 | 89 | static void init_core_ops (void); |
c906108c | 90 | |
a14ed312 | 91 | void _initialize_corelow (void); |
c906108c SS |
92 | |
93 | struct target_ops core_ops; | |
94 | ||
95 | /* Link a new core_fns into the global core_file_fns list. Called on gdb | |
96 | startup by the _initialize routine in each core file register reader, to | |
97 | register information about each format the the reader is prepared to | |
98 | handle. */ | |
99 | ||
100 | void | |
00e32a35 | 101 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 102 | { |
c5aa993b | 103 | cf->next = core_file_fns; |
c906108c SS |
104 | core_file_fns = cf; |
105 | } | |
106 | ||
2acceee2 JM |
107 | /* The default function that core file handlers can use to examine a |
108 | core file BFD and decide whether or not to accept the job of | |
109 | reading the core file. */ | |
110 | ||
111 | int | |
fba45db2 | 112 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
113 | { |
114 | int result; | |
115 | ||
116 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
117 | return (result); | |
118 | } | |
119 | ||
120 | /* Walk through the list of core functions to find a set that can | |
121 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 122 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
123 | selected. */ |
124 | ||
125 | static struct core_fns * | |
fba45db2 | 126 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
127 | { |
128 | struct core_fns *cf; | |
129 | struct core_fns *yummy = NULL; | |
130 | int matches = 0;; | |
131 | ||
0e24ac5d MK |
132 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
133 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
134 | return NULL; | |
135 | ||
2acceee2 JM |
136 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
137 | { | |
138 | if (cf->core_sniffer (cf, abfd)) | |
139 | { | |
140 | yummy = cf; | |
141 | matches++; | |
142 | } | |
143 | } | |
144 | if (matches > 1) | |
145 | { | |
8a3fe4f8 | 146 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
147 | bfd_get_filename (abfd), matches); |
148 | } | |
149 | else if (matches == 0) | |
150 | { | |
8a3fe4f8 | 151 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
152 | bfd_get_filename (abfd)); |
153 | } | |
154 | if (yummy == NULL) | |
155 | { | |
156 | yummy = core_file_fns; | |
157 | } | |
158 | return (yummy); | |
159 | } | |
160 | ||
161 | /* The default is to reject every core file format we see. Either | |
162 | BFD has to recognize it, or we have to provide a function in the | |
163 | core file handler that recognizes it. */ | |
164 | ||
165 | int | |
fba45db2 | 166 | default_check_format (bfd *abfd) |
2acceee2 JM |
167 | { |
168 | return (0); | |
169 | } | |
170 | ||
171 | /* Attempt to recognize core file formats that BFD rejects. */ | |
172 | ||
020cc13c | 173 | static int |
fba45db2 | 174 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
175 | { |
176 | struct core_fns *cf; | |
177 | ||
178 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
179 | { | |
180 | if (cf->check_format (abfd)) | |
181 | { | |
81a9a963 | 182 | return (1); |
2acceee2 JM |
183 | } |
184 | } | |
81a9a963 | 185 | return (0); |
2acceee2 | 186 | } |
c906108c SS |
187 | |
188 | /* Discard all vestiges of any previous core file and mark data and stack | |
189 | spaces as empty. */ | |
190 | ||
c906108c | 191 | static void |
fba45db2 | 192 | core_close (int quitting) |
c906108c SS |
193 | { |
194 | char *name; | |
195 | ||
196 | if (core_bfd) | |
197 | { | |
39f77062 | 198 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
c906108c | 199 | |
7a292a7a | 200 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 201 | comments in clear_solib in solib.c. */ |
7a292a7a SS |
202 | #ifdef CLEAR_SOLIB |
203 | CLEAR_SOLIB (); | |
a77053c2 MK |
204 | #else |
205 | clear_solib (); | |
7a292a7a SS |
206 | #endif |
207 | ||
c906108c SS |
208 | name = bfd_get_filename (core_bfd); |
209 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 210 | warning (_("cannot close \"%s\": %s"), |
c906108c | 211 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 212 | xfree (name); |
c906108c | 213 | core_bfd = NULL; |
c906108c SS |
214 | if (core_ops.to_sections) |
215 | { | |
b8c9b27d | 216 | xfree (core_ops.to_sections); |
c906108c SS |
217 | core_ops.to_sections = NULL; |
218 | core_ops.to_sections_end = NULL; | |
219 | } | |
220 | } | |
2acceee2 | 221 | core_vec = NULL; |
0e24ac5d | 222 | core_gdbarch = NULL; |
c906108c SS |
223 | } |
224 | ||
74b7792f AC |
225 | static void |
226 | core_close_cleanup (void *ignore) | |
227 | { | |
228 | core_close (0/*ignored*/); | |
229 | } | |
230 | ||
c906108c SS |
231 | /* Look for sections whose names start with `.reg/' so that we can extract the |
232 | list of threads in a core file. */ | |
233 | ||
234 | static void | |
4efb68b1 | 235 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c SS |
236 | { |
237 | int thread_id; | |
238 | asection *reg_sect = (asection *) reg_sect_arg; | |
239 | ||
240 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
241 | return; | |
242 | ||
243 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
244 | ||
39f77062 | 245 | add_thread (pid_to_ptid (thread_id)); |
c906108c SS |
246 | |
247 | /* Warning, Will Robinson, looking at BFD private data! */ | |
248 | ||
249 | if (reg_sect != NULL | |
c5aa993b | 250 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
39f77062 | 251 | inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ |
c906108c SS |
252 | } |
253 | ||
254 | /* This routine opens and sets up the core file bfd. */ | |
255 | ||
256 | static void | |
fba45db2 | 257 | core_open (char *filename, int from_tty) |
c906108c SS |
258 | { |
259 | const char *p; | |
260 | int siggy; | |
261 | struct cleanup *old_chain; | |
262 | char *temp; | |
263 | bfd *temp_bfd; | |
264 | int ontop; | |
265 | int scratch_chan; | |
ee28ca0f | 266 | int flags; |
c906108c SS |
267 | |
268 | target_preopen (from_tty); | |
269 | if (!filename) | |
270 | { | |
8a3fe4f8 AC |
271 | if (core_bfd) |
272 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
273 | else | |
274 | error (_("No core file specified.")); | |
c906108c SS |
275 | } |
276 | ||
277 | filename = tilde_expand (filename); | |
278 | if (filename[0] != '/') | |
279 | { | |
1754f103 | 280 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 281 | xfree (filename); |
c906108c SS |
282 | filename = temp; |
283 | } | |
284 | ||
b8c9b27d | 285 | old_chain = make_cleanup (xfree, filename); |
c906108c | 286 | |
ee28ca0f AC |
287 | flags = O_BINARY | O_LARGEFILE; |
288 | if (write_files) | |
289 | flags |= O_RDWR; | |
290 | else | |
291 | flags |= O_RDONLY; | |
292 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
293 | if (scratch_chan < 0) |
294 | perror_with_name (filename); | |
295 | ||
9f76c2cd MM |
296 | temp_bfd = bfd_fopen (filename, gnutarget, |
297 | write_files ? FOPEN_RUB : FOPEN_RB, | |
298 | scratch_chan); | |
c906108c SS |
299 | if (temp_bfd == NULL) |
300 | perror_with_name (filename); | |
301 | ||
2acceee2 JM |
302 | if (!bfd_check_format (temp_bfd, bfd_core) && |
303 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
304 | { |
305 | /* Do it after the err msg */ | |
306 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
307 | on error it does not free all the storage associated with the |
308 | bfd). */ | |
5c65bbb6 | 309 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 310 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
311 | filename, bfd_errmsg (bfd_get_error ())); |
312 | } | |
313 | ||
314 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
315 | ||
c5aa993b | 316 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
317 | unpush_target (&core_ops); |
318 | core_bfd = temp_bfd; | |
74b7792f | 319 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 320 | |
0e24ac5d MK |
321 | /* FIXME: kettenis/20031023: This is very dangerous. The |
322 | CORE_GDBARCH that results from this call may very well be | |
323 | different from CURRENT_GDBARCH. However, its methods may only | |
324 | work if it is selected as the current architecture, because they | |
325 | rely on swapped data (see gdbarch.c). We should get rid of that | |
326 | swapped data. */ | |
327 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
328 | ||
2acceee2 JM |
329 | /* Find a suitable core file handler to munch on core_bfd */ |
330 | core_vec = sniff_core_bfd (core_bfd); | |
331 | ||
c906108c SS |
332 | validate_files (); |
333 | ||
334 | /* Find the data section */ | |
335 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
336 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 337 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
338 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
339 | ||
2f1b5984 MK |
340 | /* If we have no exec file, try to set the architecture from the |
341 | core file. We don't do this unconditionally since an exec file | |
342 | typically contains more information that helps us determine the | |
343 | architecture than a core file. */ | |
344 | if (!exec_bfd) | |
345 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 346 | |
c906108c SS |
347 | ontop = !push_target (&core_ops); |
348 | discard_cleanups (old_chain); | |
349 | ||
20d2ca3e AC |
350 | /* This is done first, before anything has a chance to query the |
351 | inferior for information such as symbols. */ | |
9353355f | 352 | post_create_inferior (&core_ops, from_tty); |
20d2ca3e | 353 | |
c906108c SS |
354 | p = bfd_core_file_failing_command (core_bfd); |
355 | if (p) | |
a3f17187 | 356 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
357 | |
358 | siggy = bfd_core_file_failing_signal (core_bfd); | |
359 | if (siggy > 0) | |
8e6a3c35 | 360 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 361 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
362 | value is called ``target_signal'' and this function got the |
363 | name ..._from_host(). */ | |
a3f17187 | 364 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
8e6a3c35 | 365 | target_signal_to_string (target_signal_from_host (siggy))); |
c906108c SS |
366 | |
367 | /* Build up thread list from BFD sections. */ | |
368 | ||
369 | init_thread_list (); | |
370 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
371 | bfd_get_section_by_name (core_bfd, ".reg")); | |
372 | ||
373 | if (ontop) | |
374 | { | |
375 | /* Fetch all registers from core file. */ | |
594f7785 | 376 | target_fetch_registers (get_current_regcache (), -1); |
c906108c | 377 | |
c906108c | 378 | /* Now, set up the frame cache, and print the top of stack. */ |
35f196d9 | 379 | reinit_frame_cache (); |
b04f3ab4 | 380 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c906108c SS |
381 | } |
382 | else | |
383 | { | |
384 | warning ( | |
c5aa993b | 385 | "you won't be able to access this core file until you terminate\n\ |
c906108c SS |
386 | your %s; do ``info files''", target_longname); |
387 | } | |
388 | } | |
389 | ||
390 | static void | |
fba45db2 | 391 | core_detach (char *args, int from_tty) |
c906108c SS |
392 | { |
393 | if (args) | |
8a3fe4f8 | 394 | error (_("Too many arguments")); |
c906108c SS |
395 | unpush_target (&core_ops); |
396 | reinit_frame_cache (); | |
397 | if (from_tty) | |
a3f17187 | 398 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
399 | } |
400 | ||
de57eccd JM |
401 | |
402 | /* Try to retrieve registers from a section in core_bfd, and supply | |
403 | them to core_vec->core_read_registers, as the register set numbered | |
404 | WHICH. | |
405 | ||
39f77062 KB |
406 | If inferior_ptid is zero, do the single-threaded thing: look for a |
407 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 408 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 409 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
410 | |
411 | HUMAN_NAME is a human-readable name for the kind of registers the | |
412 | NAME section contains, for use in error messages. | |
413 | ||
414 | If REQUIRED is non-zero, print an error if the core file doesn't | |
415 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
416 | ||
417 | static void | |
9eefc95f UW |
418 | get_core_register_section (struct regcache *regcache, |
419 | char *name, | |
de57eccd JM |
420 | int which, |
421 | char *human_name, | |
422 | int required) | |
423 | { | |
3ecda457 | 424 | static char *section_name = NULL; |
7be0c536 | 425 | struct bfd_section *section; |
de57eccd JM |
426 | bfd_size_type size; |
427 | char *contents; | |
428 | ||
3ecda457 | 429 | xfree (section_name); |
39f77062 | 430 | if (PIDGET (inferior_ptid)) |
3ecda457 | 431 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 432 | else |
3ecda457 | 433 | section_name = xstrdup (name); |
de57eccd JM |
434 | |
435 | section = bfd_get_section_by_name (core_bfd, section_name); | |
436 | if (! section) | |
437 | { | |
438 | if (required) | |
8a3fe4f8 | 439 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
440 | return; |
441 | } | |
442 | ||
443 | size = bfd_section_size (core_bfd, section); | |
444 | contents = alloca (size); | |
445 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
446 | (file_ptr) 0, size)) | |
447 | { | |
8a3fe4f8 | 448 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
449 | human_name, name); |
450 | return; | |
451 | } | |
452 | ||
0e24ac5d MK |
453 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
454 | { | |
455 | const struct regset *regset; | |
456 | ||
457 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
458 | if (regset == NULL) | |
459 | { | |
460 | if (required) | |
8a3fe4f8 | 461 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
462 | human_name); |
463 | return; | |
464 | } | |
465 | ||
9eefc95f | 466 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
467 | return; |
468 | } | |
469 | ||
470 | gdb_assert (core_vec); | |
9eefc95f | 471 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
472 | ((CORE_ADDR) |
473 | bfd_section_vma (core_bfd, section))); | |
474 | } | |
475 | ||
476 | ||
c906108c SS |
477 | /* Get the registers out of a core file. This is the machine- |
478 | independent part. Fetch_core_registers is the machine-dependent | |
479 | part, typically implemented in the xm-file for each architecture. */ | |
480 | ||
481 | /* We just get all the registers, so we don't use regno. */ | |
482 | ||
c906108c | 483 | static void |
56be3814 | 484 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 485 | { |
9c5ea4d9 | 486 | int i; |
c906108c | 487 | |
0e24ac5d MK |
488 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
489 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
490 | { |
491 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 492 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
493 | return; |
494 | } | |
495 | ||
56be3814 | 496 | get_core_register_section (regcache, |
9eefc95f | 497 | ".reg", 0, "general-purpose", 1); |
56be3814 | 498 | get_core_register_section (regcache, |
9eefc95f | 499 | ".reg2", 2, "floating-point", 0); |
56be3814 | 500 | get_core_register_section (regcache, |
9eefc95f | 501 | ".reg-xfp", 3, "extended floating-point", 0); |
c906108c | 502 | |
9c5ea4d9 | 503 | /* Supply dummy value for all registers not found in the core. */ |
f57d151a | 504 | for (i = 0; i < gdbarch_num_regs (current_gdbarch); i++) |
9c5ea4d9 UW |
505 | if (!regcache_valid_p (regcache, i)) |
506 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
507 | } |
508 | ||
c906108c | 509 | static void |
fba45db2 | 510 | core_files_info (struct target_ops *t) |
c906108c SS |
511 | { |
512 | print_section_info (t, core_bfd); | |
513 | } | |
e2544d02 RM |
514 | \f |
515 | static LONGEST | |
516 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
517 | const char *annex, gdb_byte *readbuf, |
518 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
519 | { |
520 | switch (object) | |
521 | { | |
522 | case TARGET_OBJECT_MEMORY: | |
523 | if (readbuf) | |
7160c4c3 PA |
524 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
525 | len, 0/*write*/, NULL, ops); | |
e2544d02 | 526 | if (writebuf) |
7160c4c3 PA |
527 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
528 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
529 | return -1; |
530 | ||
531 | case TARGET_OBJECT_AUXV: | |
532 | if (readbuf) | |
533 | { | |
534 | /* When the aux vector is stored in core file, BFD | |
535 | represents this with a fake section called ".auxv". */ | |
536 | ||
c4c5b7ba | 537 | struct bfd_section *section; |
e2544d02 RM |
538 | bfd_size_type size; |
539 | char *contents; | |
540 | ||
541 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
542 | if (section == NULL) | |
543 | return -1; | |
544 | ||
545 | size = bfd_section_size (core_bfd, section); | |
546 | if (offset >= size) | |
547 | return 0; | |
548 | size -= offset; | |
549 | if (size > len) | |
550 | size = len; | |
403e1656 MK |
551 | if (size > 0 |
552 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
553 | (file_ptr) offset, size)) | |
e2544d02 | 554 | { |
8a3fe4f8 | 555 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
556 | return -1; |
557 | } | |
558 | ||
559 | return size; | |
560 | } | |
561 | return -1; | |
562 | ||
403e1656 MK |
563 | case TARGET_OBJECT_WCOOKIE: |
564 | if (readbuf) | |
565 | { | |
566 | /* When the StackGhost cookie is stored in core file, BFD | |
567 | represents this with a fake section called ".wcookie". */ | |
568 | ||
569 | struct bfd_section *section; | |
570 | bfd_size_type size; | |
571 | char *contents; | |
572 | ||
573 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
574 | if (section == NULL) | |
575 | return -1; | |
576 | ||
577 | size = bfd_section_size (core_bfd, section); | |
578 | if (offset >= size) | |
579 | return 0; | |
580 | size -= offset; | |
581 | if (size > len) | |
582 | size = len; | |
583 | if (size > 0 | |
584 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
585 | (file_ptr) offset, size)) | |
586 | { | |
8a3fe4f8 | 587 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
588 | return -1; |
589 | } | |
590 | ||
591 | return size; | |
592 | } | |
593 | return -1; | |
594 | ||
de584861 PA |
595 | case TARGET_OBJECT_LIBRARIES: |
596 | if (core_gdbarch | |
597 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
598 | { | |
599 | if (writebuf) | |
600 | return -1; | |
601 | return | |
602 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
603 | readbuf, offset, len); | |
604 | } | |
605 | /* FALL THROUGH */ | |
606 | ||
e2544d02 RM |
607 | default: |
608 | if (ops->beneath != NULL) | |
609 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
610 | readbuf, writebuf, offset, len); | |
611 | return -1; | |
612 | } | |
613 | } | |
614 | ||
c906108c SS |
615 | \f |
616 | /* If mourn is being called in all the right places, this could be say | |
617 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
618 | ||
619 | static int | |
8181d85f | 620 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
621 | { |
622 | return 0; | |
623 | } | |
624 | ||
625 | ||
626 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
627 | exactly lively, are they? On the other hand, if we don't claim | |
628 | that each & every one is alive, then we don't get any of them | |
629 | to appear in an "info thread" command, which is quite a useful | |
630 | behaviour. | |
c5aa993b | 631 | */ |
c906108c | 632 | static int |
39f77062 | 633 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
634 | { |
635 | return 1; | |
636 | } | |
637 | ||
4eb0ad19 DJ |
638 | /* Ask the current architecture what it knows about this core file. |
639 | That will be used, in turn, to pick a better architecture. This | |
640 | wrapper could be avoided if targets got a chance to specialize | |
641 | core_ops. */ | |
642 | ||
643 | static const struct target_desc * | |
644 | core_read_description (struct target_ops *target) | |
645 | { | |
646 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
647 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
648 | ||
649 | return NULL; | |
650 | } | |
651 | ||
c906108c SS |
652 | /* Fill in core_ops with its defined operations and properties. */ |
653 | ||
654 | static void | |
fba45db2 | 655 | init_core_ops (void) |
c906108c SS |
656 | { |
657 | core_ops.to_shortname = "core"; | |
658 | core_ops.to_longname = "Local core dump file"; | |
659 | core_ops.to_doc = | |
660 | "Use a core file as a target. Specify the filename of the core file."; | |
661 | core_ops.to_open = core_open; | |
662 | core_ops.to_close = core_close; | |
663 | core_ops.to_attach = find_default_attach; | |
c906108c | 664 | core_ops.to_detach = core_detach; |
c906108c | 665 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 666 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 667 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
668 | core_ops.to_files_info = core_files_info; |
669 | core_ops.to_insert_breakpoint = ignore; | |
670 | core_ops.to_remove_breakpoint = ignore; | |
671 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 672 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 673 | core_ops.to_read_description = core_read_description; |
c906108c SS |
674 | core_ops.to_stratum = core_stratum; |
675 | core_ops.to_has_memory = 1; | |
676 | core_ops.to_has_stack = 1; | |
677 | core_ops.to_has_registers = 1; | |
c5aa993b | 678 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
679 | } |
680 | ||
681 | /* non-zero if we should not do the add_target call in | |
682 | _initialize_corelow; not initialized (i.e., bss) so that | |
683 | the target can initialize it (i.e., data) if appropriate. | |
684 | This needs to be set at compile time because we don't know | |
685 | for sure whether the target's initialize routine is called | |
686 | before us or after us. */ | |
687 | int coreops_suppress_target; | |
688 | ||
689 | void | |
fba45db2 | 690 | _initialize_corelow (void) |
c906108c SS |
691 | { |
692 | init_core_ops (); | |
693 | ||
694 | if (!coreops_suppress_target) | |
695 | add_target (&core_ops); | |
696 | } |