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, |
9b254dd1 | 4 | 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008 |
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 | |
a14ed312 | 78 | static void core_detach (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 | ||
96 | /* Link a new core_fns into the global core_file_fns list. Called on gdb | |
97 | startup by the _initialize routine in each core file register reader, to | |
98 | register information about each format the the reader is prepared to | |
99 | handle. */ | |
100 | ||
101 | void | |
00e32a35 | 102 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 103 | { |
c5aa993b | 104 | cf->next = core_file_fns; |
c906108c SS |
105 | core_file_fns = cf; |
106 | } | |
107 | ||
2acceee2 JM |
108 | /* The default function that core file handlers can use to examine a |
109 | core file BFD and decide whether or not to accept the job of | |
110 | reading the core file. */ | |
111 | ||
112 | int | |
fba45db2 | 113 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
114 | { |
115 | int result; | |
116 | ||
117 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
118 | return (result); | |
119 | } | |
120 | ||
121 | /* Walk through the list of core functions to find a set that can | |
122 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 123 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
124 | selected. */ |
125 | ||
126 | static struct core_fns * | |
fba45db2 | 127 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
128 | { |
129 | struct core_fns *cf; | |
130 | struct core_fns *yummy = NULL; | |
131 | int matches = 0;; | |
132 | ||
0e24ac5d MK |
133 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
134 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
135 | return NULL; | |
136 | ||
2acceee2 JM |
137 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
138 | { | |
139 | if (cf->core_sniffer (cf, abfd)) | |
140 | { | |
141 | yummy = cf; | |
142 | matches++; | |
143 | } | |
144 | } | |
145 | if (matches > 1) | |
146 | { | |
8a3fe4f8 | 147 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
148 | bfd_get_filename (abfd), matches); |
149 | } | |
150 | else if (matches == 0) | |
151 | { | |
8a3fe4f8 | 152 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
153 | bfd_get_filename (abfd)); |
154 | } | |
155 | if (yummy == NULL) | |
156 | { | |
157 | yummy = core_file_fns; | |
158 | } | |
159 | return (yummy); | |
160 | } | |
161 | ||
162 | /* The default is to reject every core file format we see. Either | |
163 | BFD has to recognize it, or we have to provide a function in the | |
164 | core file handler that recognizes it. */ | |
165 | ||
166 | int | |
fba45db2 | 167 | default_check_format (bfd *abfd) |
2acceee2 JM |
168 | { |
169 | return (0); | |
170 | } | |
171 | ||
172 | /* Attempt to recognize core file formats that BFD rejects. */ | |
173 | ||
020cc13c | 174 | static int |
fba45db2 | 175 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
176 | { |
177 | struct core_fns *cf; | |
178 | ||
179 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
180 | { | |
181 | if (cf->check_format (abfd)) | |
182 | { | |
81a9a963 | 183 | return (1); |
2acceee2 JM |
184 | } |
185 | } | |
81a9a963 | 186 | return (0); |
2acceee2 | 187 | } |
c906108c SS |
188 | |
189 | /* Discard all vestiges of any previous core file and mark data and stack | |
190 | spaces as empty. */ | |
191 | ||
c906108c | 192 | static void |
fba45db2 | 193 | core_close (int quitting) |
c906108c SS |
194 | { |
195 | char *name; | |
196 | ||
197 | if (core_bfd) | |
198 | { | |
39f77062 | 199 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
c906108c | 200 | |
7a292a7a | 201 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 202 | comments in clear_solib in solib.c. */ |
a77053c2 | 203 | clear_solib (); |
7a292a7a | 204 | |
c906108c SS |
205 | name = bfd_get_filename (core_bfd); |
206 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 207 | warning (_("cannot close \"%s\": %s"), |
c906108c | 208 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 209 | xfree (name); |
c906108c | 210 | core_bfd = NULL; |
c906108c SS |
211 | if (core_ops.to_sections) |
212 | { | |
b8c9b27d | 213 | xfree (core_ops.to_sections); |
c906108c SS |
214 | core_ops.to_sections = NULL; |
215 | core_ops.to_sections_end = NULL; | |
216 | } | |
217 | } | |
2acceee2 | 218 | core_vec = NULL; |
0e24ac5d | 219 | core_gdbarch = NULL; |
c906108c SS |
220 | } |
221 | ||
74b7792f AC |
222 | static void |
223 | core_close_cleanup (void *ignore) | |
224 | { | |
225 | core_close (0/*ignored*/); | |
226 | } | |
227 | ||
c906108c SS |
228 | /* Look for sections whose names start with `.reg/' so that we can extract the |
229 | list of threads in a core file. */ | |
230 | ||
231 | static void | |
4efb68b1 | 232 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c SS |
233 | { |
234 | int thread_id; | |
235 | asection *reg_sect = (asection *) reg_sect_arg; | |
236 | ||
237 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
238 | return; | |
239 | ||
240 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
241 | ||
39f77062 | 242 | add_thread (pid_to_ptid (thread_id)); |
c906108c SS |
243 | |
244 | /* Warning, Will Robinson, looking at BFD private data! */ | |
245 | ||
246 | if (reg_sect != NULL | |
c5aa993b | 247 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
39f77062 | 248 | inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ |
c906108c SS |
249 | } |
250 | ||
251 | /* This routine opens and sets up the core file bfd. */ | |
252 | ||
253 | static void | |
fba45db2 | 254 | core_open (char *filename, int from_tty) |
c906108c SS |
255 | { |
256 | const char *p; | |
257 | int siggy; | |
258 | struct cleanup *old_chain; | |
259 | char *temp; | |
260 | bfd *temp_bfd; | |
c906108c | 261 | int scratch_chan; |
ee28ca0f | 262 | int flags; |
c906108c SS |
263 | |
264 | target_preopen (from_tty); | |
265 | if (!filename) | |
266 | { | |
8a3fe4f8 AC |
267 | if (core_bfd) |
268 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
269 | else | |
270 | error (_("No core file specified.")); | |
c906108c SS |
271 | } |
272 | ||
273 | filename = tilde_expand (filename); | |
f90c07ac | 274 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 275 | { |
1754f103 | 276 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 277 | xfree (filename); |
c906108c SS |
278 | filename = temp; |
279 | } | |
280 | ||
b8c9b27d | 281 | old_chain = make_cleanup (xfree, filename); |
c906108c | 282 | |
ee28ca0f AC |
283 | flags = O_BINARY | O_LARGEFILE; |
284 | if (write_files) | |
285 | flags |= O_RDWR; | |
286 | else | |
287 | flags |= O_RDONLY; | |
288 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
289 | if (scratch_chan < 0) |
290 | perror_with_name (filename); | |
291 | ||
9f76c2cd MM |
292 | temp_bfd = bfd_fopen (filename, gnutarget, |
293 | write_files ? FOPEN_RUB : FOPEN_RB, | |
294 | scratch_chan); | |
c906108c SS |
295 | if (temp_bfd == NULL) |
296 | perror_with_name (filename); | |
297 | ||
2acceee2 JM |
298 | if (!bfd_check_format (temp_bfd, bfd_core) && |
299 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
300 | { |
301 | /* Do it after the err msg */ | |
302 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
303 | on error it does not free all the storage associated with the |
304 | bfd). */ | |
5c65bbb6 | 305 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 306 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
307 | filename, bfd_errmsg (bfd_get_error ())); |
308 | } | |
309 | ||
310 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
311 | ||
c5aa993b | 312 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
313 | unpush_target (&core_ops); |
314 | core_bfd = temp_bfd; | |
74b7792f | 315 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 316 | |
0e24ac5d MK |
317 | /* FIXME: kettenis/20031023: This is very dangerous. The |
318 | CORE_GDBARCH that results from this call may very well be | |
319 | different from CURRENT_GDBARCH. However, its methods may only | |
320 | work if it is selected as the current architecture, because they | |
321 | rely on swapped data (see gdbarch.c). We should get rid of that | |
322 | swapped data. */ | |
323 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
324 | ||
2acceee2 JM |
325 | /* Find a suitable core file handler to munch on core_bfd */ |
326 | core_vec = sniff_core_bfd (core_bfd); | |
327 | ||
c906108c SS |
328 | validate_files (); |
329 | ||
330 | /* Find the data section */ | |
331 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
332 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 333 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
334 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
335 | ||
2f1b5984 MK |
336 | /* If we have no exec file, try to set the architecture from the |
337 | core file. We don't do this unconditionally since an exec file | |
338 | typically contains more information that helps us determine the | |
339 | architecture than a core file. */ | |
340 | if (!exec_bfd) | |
341 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 342 | |
87ab71f0 | 343 | push_target (&core_ops); |
c906108c SS |
344 | discard_cleanups (old_chain); |
345 | ||
20d2ca3e AC |
346 | /* This is done first, before anything has a chance to query the |
347 | inferior for information such as symbols. */ | |
9353355f | 348 | post_create_inferior (&core_ops, from_tty); |
20d2ca3e | 349 | |
c906108c SS |
350 | p = bfd_core_file_failing_command (core_bfd); |
351 | if (p) | |
a3f17187 | 352 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
353 | |
354 | siggy = bfd_core_file_failing_signal (core_bfd); | |
355 | if (siggy > 0) | |
8e6a3c35 | 356 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 357 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
358 | value is called ``target_signal'' and this function got the |
359 | name ..._from_host(). */ | |
a3f17187 | 360 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
1cded358 AR |
361 | target_signal_to_string ( |
362 | gdbarch_target_signal_from_host (core_gdbarch, siggy))); | |
c906108c SS |
363 | |
364 | /* Build up thread list from BFD sections. */ | |
365 | ||
366 | init_thread_list (); | |
367 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
368 | bfd_get_section_by_name (core_bfd, ".reg")); | |
369 | ||
87ab71f0 PA |
370 | /* Fetch all registers from core file. */ |
371 | target_fetch_registers (get_current_regcache (), -1); | |
c906108c | 372 | |
87ab71f0 PA |
373 | /* Now, set up the frame cache, and print the top of stack. */ |
374 | reinit_frame_cache (); | |
375 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
c906108c SS |
376 | } |
377 | ||
378 | static void | |
fba45db2 | 379 | core_detach (char *args, int from_tty) |
c906108c SS |
380 | { |
381 | if (args) | |
8a3fe4f8 | 382 | error (_("Too many arguments")); |
c906108c SS |
383 | unpush_target (&core_ops); |
384 | reinit_frame_cache (); | |
385 | if (from_tty) | |
a3f17187 | 386 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
387 | } |
388 | ||
de57eccd JM |
389 | |
390 | /* Try to retrieve registers from a section in core_bfd, and supply | |
391 | them to core_vec->core_read_registers, as the register set numbered | |
392 | WHICH. | |
393 | ||
39f77062 KB |
394 | If inferior_ptid is zero, do the single-threaded thing: look for a |
395 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 396 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 397 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
398 | |
399 | HUMAN_NAME is a human-readable name for the kind of registers the | |
400 | NAME section contains, for use in error messages. | |
401 | ||
402 | If REQUIRED is non-zero, print an error if the core file doesn't | |
403 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
404 | ||
405 | static void | |
9eefc95f UW |
406 | get_core_register_section (struct regcache *regcache, |
407 | char *name, | |
de57eccd JM |
408 | int which, |
409 | char *human_name, | |
410 | int required) | |
411 | { | |
3ecda457 | 412 | static char *section_name = NULL; |
7be0c536 | 413 | struct bfd_section *section; |
de57eccd JM |
414 | bfd_size_type size; |
415 | char *contents; | |
416 | ||
3ecda457 | 417 | xfree (section_name); |
39f77062 | 418 | if (PIDGET (inferior_ptid)) |
3ecda457 | 419 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 420 | else |
3ecda457 | 421 | section_name = xstrdup (name); |
de57eccd JM |
422 | |
423 | section = bfd_get_section_by_name (core_bfd, section_name); | |
424 | if (! section) | |
425 | { | |
426 | if (required) | |
8a3fe4f8 | 427 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
428 | return; |
429 | } | |
430 | ||
431 | size = bfd_section_size (core_bfd, section); | |
432 | contents = alloca (size); | |
433 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
434 | (file_ptr) 0, size)) | |
435 | { | |
8a3fe4f8 | 436 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
437 | human_name, name); |
438 | return; | |
439 | } | |
440 | ||
0e24ac5d MK |
441 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
442 | { | |
443 | const struct regset *regset; | |
444 | ||
445 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
446 | if (regset == NULL) | |
447 | { | |
448 | if (required) | |
8a3fe4f8 | 449 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
450 | human_name); |
451 | return; | |
452 | } | |
453 | ||
9eefc95f | 454 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
455 | return; |
456 | } | |
457 | ||
458 | gdb_assert (core_vec); | |
9eefc95f | 459 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
460 | ((CORE_ADDR) |
461 | bfd_section_vma (core_bfd, section))); | |
462 | } | |
463 | ||
464 | ||
c906108c SS |
465 | /* Get the registers out of a core file. This is the machine- |
466 | independent part. Fetch_core_registers is the machine-dependent | |
467 | part, typically implemented in the xm-file for each architecture. */ | |
468 | ||
469 | /* We just get all the registers, so we don't use regno. */ | |
470 | ||
c906108c | 471 | static void |
56be3814 | 472 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 473 | { |
9c5ea4d9 | 474 | int i; |
c906108c | 475 | |
0e24ac5d MK |
476 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
477 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
478 | { |
479 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 480 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
481 | return; |
482 | } | |
483 | ||
56be3814 | 484 | get_core_register_section (regcache, |
9eefc95f | 485 | ".reg", 0, "general-purpose", 1); |
56be3814 | 486 | get_core_register_section (regcache, |
9eefc95f | 487 | ".reg2", 2, "floating-point", 0); |
56be3814 | 488 | get_core_register_section (regcache, |
9eefc95f | 489 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
490 | get_core_register_section (regcache, |
491 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
604c2f83 LM |
492 | get_core_register_section (regcache, |
493 | ".reg-ppc-vsx", 4, "POWER7 VSX", 0); | |
c906108c | 494 | |
9c5ea4d9 | 495 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 496 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
497 | if (!regcache_valid_p (regcache, i)) |
498 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
499 | } |
500 | ||
c906108c | 501 | static void |
fba45db2 | 502 | core_files_info (struct target_ops *t) |
c906108c SS |
503 | { |
504 | print_section_info (t, core_bfd); | |
505 | } | |
e2544d02 RM |
506 | \f |
507 | static LONGEST | |
508 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
509 | const char *annex, gdb_byte *readbuf, |
510 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
511 | { |
512 | switch (object) | |
513 | { | |
514 | case TARGET_OBJECT_MEMORY: | |
515 | if (readbuf) | |
7160c4c3 | 516 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
662fb31b | 517 | len, 0/*read*/, NULL, ops); |
e2544d02 | 518 | if (writebuf) |
7160c4c3 PA |
519 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
520 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
521 | return -1; |
522 | ||
523 | case TARGET_OBJECT_AUXV: | |
524 | if (readbuf) | |
525 | { | |
526 | /* When the aux vector is stored in core file, BFD | |
527 | represents this with a fake section called ".auxv". */ | |
528 | ||
c4c5b7ba | 529 | struct bfd_section *section; |
e2544d02 RM |
530 | bfd_size_type size; |
531 | char *contents; | |
532 | ||
533 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
534 | if (section == NULL) | |
535 | return -1; | |
536 | ||
537 | size = bfd_section_size (core_bfd, section); | |
538 | if (offset >= size) | |
539 | return 0; | |
540 | size -= offset; | |
541 | if (size > len) | |
542 | size = len; | |
403e1656 MK |
543 | if (size > 0 |
544 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
545 | (file_ptr) offset, size)) | |
e2544d02 | 546 | { |
8a3fe4f8 | 547 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
548 | return -1; |
549 | } | |
550 | ||
551 | return size; | |
552 | } | |
553 | return -1; | |
554 | ||
403e1656 MK |
555 | case TARGET_OBJECT_WCOOKIE: |
556 | if (readbuf) | |
557 | { | |
558 | /* When the StackGhost cookie is stored in core file, BFD | |
559 | represents this with a fake section called ".wcookie". */ | |
560 | ||
561 | struct bfd_section *section; | |
562 | bfd_size_type size; | |
563 | char *contents; | |
564 | ||
565 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
566 | if (section == NULL) | |
567 | return -1; | |
568 | ||
569 | size = bfd_section_size (core_bfd, section); | |
570 | if (offset >= size) | |
571 | return 0; | |
572 | size -= offset; | |
573 | if (size > len) | |
574 | size = len; | |
575 | if (size > 0 | |
576 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
577 | (file_ptr) offset, size)) | |
578 | { | |
8a3fe4f8 | 579 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
580 | return -1; |
581 | } | |
582 | ||
583 | return size; | |
584 | } | |
585 | return -1; | |
586 | ||
de584861 PA |
587 | case TARGET_OBJECT_LIBRARIES: |
588 | if (core_gdbarch | |
589 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
590 | { | |
591 | if (writebuf) | |
592 | return -1; | |
593 | return | |
594 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
595 | readbuf, offset, len); | |
596 | } | |
597 | /* FALL THROUGH */ | |
598 | ||
e2544d02 RM |
599 | default: |
600 | if (ops->beneath != NULL) | |
601 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
602 | readbuf, writebuf, offset, len); | |
603 | return -1; | |
604 | } | |
605 | } | |
606 | ||
c906108c SS |
607 | \f |
608 | /* If mourn is being called in all the right places, this could be say | |
609 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
610 | ||
611 | static int | |
8181d85f | 612 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
613 | { |
614 | return 0; | |
615 | } | |
616 | ||
617 | ||
618 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
619 | exactly lively, are they? On the other hand, if we don't claim | |
620 | that each & every one is alive, then we don't get any of them | |
621 | to appear in an "info thread" command, which is quite a useful | |
622 | behaviour. | |
c5aa993b | 623 | */ |
c906108c | 624 | static int |
39f77062 | 625 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
626 | { |
627 | return 1; | |
628 | } | |
629 | ||
4eb0ad19 DJ |
630 | /* Ask the current architecture what it knows about this core file. |
631 | That will be used, in turn, to pick a better architecture. This | |
632 | wrapper could be avoided if targets got a chance to specialize | |
633 | core_ops. */ | |
634 | ||
635 | static const struct target_desc * | |
636 | core_read_description (struct target_ops *target) | |
637 | { | |
638 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
639 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | ||
c906108c SS |
644 | /* Fill in core_ops with its defined operations and properties. */ |
645 | ||
646 | static void | |
fba45db2 | 647 | init_core_ops (void) |
c906108c SS |
648 | { |
649 | core_ops.to_shortname = "core"; | |
650 | core_ops.to_longname = "Local core dump file"; | |
651 | core_ops.to_doc = | |
652 | "Use a core file as a target. Specify the filename of the core file."; | |
653 | core_ops.to_open = core_open; | |
654 | core_ops.to_close = core_close; | |
655 | core_ops.to_attach = find_default_attach; | |
c906108c | 656 | core_ops.to_detach = core_detach; |
c906108c | 657 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 658 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 659 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
660 | core_ops.to_files_info = core_files_info; |
661 | core_ops.to_insert_breakpoint = ignore; | |
662 | core_ops.to_remove_breakpoint = ignore; | |
663 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 664 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 665 | core_ops.to_read_description = core_read_description; |
c906108c SS |
666 | core_ops.to_stratum = core_stratum; |
667 | core_ops.to_has_memory = 1; | |
668 | core_ops.to_has_stack = 1; | |
669 | core_ops.to_has_registers = 1; | |
c5aa993b | 670 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
671 | } |
672 | ||
673 | /* non-zero if we should not do the add_target call in | |
674 | _initialize_corelow; not initialized (i.e., bss) so that | |
675 | the target can initialize it (i.e., data) if appropriate. | |
676 | This needs to be set at compile time because we don't know | |
677 | for sure whether the target's initialize routine is called | |
678 | before us or after us. */ | |
679 | int coreops_suppress_target; | |
680 | ||
681 | void | |
fba45db2 | 682 | _initialize_corelow (void) |
c906108c SS |
683 | { |
684 | init_core_ops (); | |
685 | ||
686 | if (!coreops_suppress_target) | |
687 | add_target (&core_ops); | |
688 | } |