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; | |
261 | int ontop; | |
262 | int scratch_chan; | |
ee28ca0f | 263 | int flags; |
c906108c SS |
264 | |
265 | target_preopen (from_tty); | |
266 | if (!filename) | |
267 | { | |
8a3fe4f8 AC |
268 | if (core_bfd) |
269 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
270 | else | |
271 | error (_("No core file specified.")); | |
c906108c SS |
272 | } |
273 | ||
274 | filename = tilde_expand (filename); | |
f90c07ac | 275 | if (!IS_ABSOLUTE_PATH(filename)) |
c906108c | 276 | { |
1754f103 | 277 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 278 | xfree (filename); |
c906108c SS |
279 | filename = temp; |
280 | } | |
281 | ||
b8c9b27d | 282 | old_chain = make_cleanup (xfree, filename); |
c906108c | 283 | |
ee28ca0f AC |
284 | flags = O_BINARY | O_LARGEFILE; |
285 | if (write_files) | |
286 | flags |= O_RDWR; | |
287 | else | |
288 | flags |= O_RDONLY; | |
289 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
290 | if (scratch_chan < 0) |
291 | perror_with_name (filename); | |
292 | ||
9f76c2cd MM |
293 | temp_bfd = bfd_fopen (filename, gnutarget, |
294 | write_files ? FOPEN_RUB : FOPEN_RB, | |
295 | scratch_chan); | |
c906108c SS |
296 | if (temp_bfd == NULL) |
297 | perror_with_name (filename); | |
298 | ||
2acceee2 JM |
299 | if (!bfd_check_format (temp_bfd, bfd_core) && |
300 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
301 | { |
302 | /* Do it after the err msg */ | |
303 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
304 | on error it does not free all the storage associated with the |
305 | bfd). */ | |
5c65bbb6 | 306 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 307 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
308 | filename, bfd_errmsg (bfd_get_error ())); |
309 | } | |
310 | ||
311 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
312 | ||
c5aa993b | 313 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
314 | unpush_target (&core_ops); |
315 | core_bfd = temp_bfd; | |
74b7792f | 316 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 317 | |
0e24ac5d MK |
318 | /* FIXME: kettenis/20031023: This is very dangerous. The |
319 | CORE_GDBARCH that results from this call may very well be | |
320 | different from CURRENT_GDBARCH. However, its methods may only | |
321 | work if it is selected as the current architecture, because they | |
322 | rely on swapped data (see gdbarch.c). We should get rid of that | |
323 | swapped data. */ | |
324 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
325 | ||
2acceee2 JM |
326 | /* Find a suitable core file handler to munch on core_bfd */ |
327 | core_vec = sniff_core_bfd (core_bfd); | |
328 | ||
c906108c SS |
329 | validate_files (); |
330 | ||
331 | /* Find the data section */ | |
332 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
333 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 334 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
335 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
336 | ||
2f1b5984 MK |
337 | /* If we have no exec file, try to set the architecture from the |
338 | core file. We don't do this unconditionally since an exec file | |
339 | typically contains more information that helps us determine the | |
340 | architecture than a core file. */ | |
341 | if (!exec_bfd) | |
342 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 343 | |
c906108c SS |
344 | ontop = !push_target (&core_ops); |
345 | discard_cleanups (old_chain); | |
346 | ||
20d2ca3e AC |
347 | /* This is done first, before anything has a chance to query the |
348 | inferior for information such as symbols. */ | |
9353355f | 349 | post_create_inferior (&core_ops, from_tty); |
20d2ca3e | 350 | |
c906108c SS |
351 | p = bfd_core_file_failing_command (core_bfd); |
352 | if (p) | |
a3f17187 | 353 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
354 | |
355 | siggy = bfd_core_file_failing_signal (core_bfd); | |
356 | if (siggy > 0) | |
8e6a3c35 | 357 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 358 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
359 | value is called ``target_signal'' and this function got the |
360 | name ..._from_host(). */ | |
a3f17187 | 361 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
8e6a3c35 | 362 | target_signal_to_string (target_signal_from_host (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 | ||
370 | if (ontop) | |
371 | { | |
372 | /* Fetch all registers from core file. */ | |
594f7785 | 373 | target_fetch_registers (get_current_regcache (), -1); |
c906108c | 374 | |
c906108c | 375 | /* Now, set up the frame cache, and print the top of stack. */ |
35f196d9 | 376 | reinit_frame_cache (); |
b04f3ab4 | 377 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c906108c SS |
378 | } |
379 | else | |
380 | { | |
381 | warning ( | |
c5aa993b | 382 | "you won't be able to access this core file until you terminate\n\ |
c906108c SS |
383 | your %s; do ``info files''", target_longname); |
384 | } | |
385 | } | |
386 | ||
387 | static void | |
fba45db2 | 388 | core_detach (char *args, int from_tty) |
c906108c SS |
389 | { |
390 | if (args) | |
8a3fe4f8 | 391 | error (_("Too many arguments")); |
c906108c SS |
392 | unpush_target (&core_ops); |
393 | reinit_frame_cache (); | |
394 | if (from_tty) | |
a3f17187 | 395 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
396 | } |
397 | ||
de57eccd JM |
398 | |
399 | /* Try to retrieve registers from a section in core_bfd, and supply | |
400 | them to core_vec->core_read_registers, as the register set numbered | |
401 | WHICH. | |
402 | ||
39f77062 KB |
403 | If inferior_ptid is zero, do the single-threaded thing: look for a |
404 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 405 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 406 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
407 | |
408 | HUMAN_NAME is a human-readable name for the kind of registers the | |
409 | NAME section contains, for use in error messages. | |
410 | ||
411 | If REQUIRED is non-zero, print an error if the core file doesn't | |
412 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
413 | ||
414 | static void | |
9eefc95f UW |
415 | get_core_register_section (struct regcache *regcache, |
416 | char *name, | |
de57eccd JM |
417 | int which, |
418 | char *human_name, | |
419 | int required) | |
420 | { | |
3ecda457 | 421 | static char *section_name = NULL; |
7be0c536 | 422 | struct bfd_section *section; |
de57eccd JM |
423 | bfd_size_type size; |
424 | char *contents; | |
425 | ||
3ecda457 | 426 | xfree (section_name); |
39f77062 | 427 | if (PIDGET (inferior_ptid)) |
3ecda457 | 428 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 429 | else |
3ecda457 | 430 | section_name = xstrdup (name); |
de57eccd JM |
431 | |
432 | section = bfd_get_section_by_name (core_bfd, section_name); | |
433 | if (! section) | |
434 | { | |
435 | if (required) | |
8a3fe4f8 | 436 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
437 | return; |
438 | } | |
439 | ||
440 | size = bfd_section_size (core_bfd, section); | |
441 | contents = alloca (size); | |
442 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
443 | (file_ptr) 0, size)) | |
444 | { | |
8a3fe4f8 | 445 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
446 | human_name, name); |
447 | return; | |
448 | } | |
449 | ||
0e24ac5d MK |
450 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
451 | { | |
452 | const struct regset *regset; | |
453 | ||
454 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
455 | if (regset == NULL) | |
456 | { | |
457 | if (required) | |
8a3fe4f8 | 458 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
459 | human_name); |
460 | return; | |
461 | } | |
462 | ||
9eefc95f | 463 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
464 | return; |
465 | } | |
466 | ||
467 | gdb_assert (core_vec); | |
9eefc95f | 468 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
469 | ((CORE_ADDR) |
470 | bfd_section_vma (core_bfd, section))); | |
471 | } | |
472 | ||
473 | ||
c906108c SS |
474 | /* Get the registers out of a core file. This is the machine- |
475 | independent part. Fetch_core_registers is the machine-dependent | |
476 | part, typically implemented in the xm-file for each architecture. */ | |
477 | ||
478 | /* We just get all the registers, so we don't use regno. */ | |
479 | ||
c906108c | 480 | static void |
56be3814 | 481 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 482 | { |
9c5ea4d9 | 483 | int i; |
c906108c | 484 | |
0e24ac5d MK |
485 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
486 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
487 | { |
488 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 489 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
490 | return; |
491 | } | |
492 | ||
56be3814 | 493 | get_core_register_section (regcache, |
9eefc95f | 494 | ".reg", 0, "general-purpose", 1); |
56be3814 | 495 | get_core_register_section (regcache, |
9eefc95f | 496 | ".reg2", 2, "floating-point", 0); |
56be3814 | 497 | get_core_register_section (regcache, |
9eefc95f | 498 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
499 | get_core_register_section (regcache, |
500 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
c906108c | 501 | |
9c5ea4d9 | 502 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 503 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
504 | if (!regcache_valid_p (regcache, i)) |
505 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
506 | } |
507 | ||
c906108c | 508 | static void |
fba45db2 | 509 | core_files_info (struct target_ops *t) |
c906108c SS |
510 | { |
511 | print_section_info (t, core_bfd); | |
512 | } | |
e2544d02 RM |
513 | \f |
514 | static LONGEST | |
515 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
516 | const char *annex, gdb_byte *readbuf, |
517 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
518 | { |
519 | switch (object) | |
520 | { | |
521 | case TARGET_OBJECT_MEMORY: | |
522 | if (readbuf) | |
7160c4c3 | 523 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
662fb31b | 524 | len, 0/*read*/, NULL, ops); |
e2544d02 | 525 | if (writebuf) |
7160c4c3 PA |
526 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
527 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
528 | return -1; |
529 | ||
530 | case TARGET_OBJECT_AUXV: | |
531 | if (readbuf) | |
532 | { | |
533 | /* When the aux vector is stored in core file, BFD | |
534 | represents this with a fake section called ".auxv". */ | |
535 | ||
c4c5b7ba | 536 | struct bfd_section *section; |
e2544d02 RM |
537 | bfd_size_type size; |
538 | char *contents; | |
539 | ||
540 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
541 | if (section == NULL) | |
542 | return -1; | |
543 | ||
544 | size = bfd_section_size (core_bfd, section); | |
545 | if (offset >= size) | |
546 | return 0; | |
547 | size -= offset; | |
548 | if (size > len) | |
549 | size = len; | |
403e1656 MK |
550 | if (size > 0 |
551 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
552 | (file_ptr) offset, size)) | |
e2544d02 | 553 | { |
8a3fe4f8 | 554 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
555 | return -1; |
556 | } | |
557 | ||
558 | return size; | |
559 | } | |
560 | return -1; | |
561 | ||
403e1656 MK |
562 | case TARGET_OBJECT_WCOOKIE: |
563 | if (readbuf) | |
564 | { | |
565 | /* When the StackGhost cookie is stored in core file, BFD | |
566 | represents this with a fake section called ".wcookie". */ | |
567 | ||
568 | struct bfd_section *section; | |
569 | bfd_size_type size; | |
570 | char *contents; | |
571 | ||
572 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
573 | if (section == NULL) | |
574 | return -1; | |
575 | ||
576 | size = bfd_section_size (core_bfd, section); | |
577 | if (offset >= size) | |
578 | return 0; | |
579 | size -= offset; | |
580 | if (size > len) | |
581 | size = len; | |
582 | if (size > 0 | |
583 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
584 | (file_ptr) offset, size)) | |
585 | { | |
8a3fe4f8 | 586 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
587 | return -1; |
588 | } | |
589 | ||
590 | return size; | |
591 | } | |
592 | return -1; | |
593 | ||
de584861 PA |
594 | case TARGET_OBJECT_LIBRARIES: |
595 | if (core_gdbarch | |
596 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
597 | { | |
598 | if (writebuf) | |
599 | return -1; | |
600 | return | |
601 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
602 | readbuf, offset, len); | |
603 | } | |
604 | /* FALL THROUGH */ | |
605 | ||
e2544d02 RM |
606 | default: |
607 | if (ops->beneath != NULL) | |
608 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
609 | readbuf, writebuf, offset, len); | |
610 | return -1; | |
611 | } | |
612 | } | |
613 | ||
c906108c SS |
614 | \f |
615 | /* If mourn is being called in all the right places, this could be say | |
616 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
617 | ||
618 | static int | |
8181d85f | 619 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
620 | { |
621 | return 0; | |
622 | } | |
623 | ||
624 | ||
625 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
626 | exactly lively, are they? On the other hand, if we don't claim | |
627 | that each & every one is alive, then we don't get any of them | |
628 | to appear in an "info thread" command, which is quite a useful | |
629 | behaviour. | |
c5aa993b | 630 | */ |
c906108c | 631 | static int |
39f77062 | 632 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
633 | { |
634 | return 1; | |
635 | } | |
636 | ||
4eb0ad19 DJ |
637 | /* Ask the current architecture what it knows about this core file. |
638 | That will be used, in turn, to pick a better architecture. This | |
639 | wrapper could be avoided if targets got a chance to specialize | |
640 | core_ops. */ | |
641 | ||
642 | static const struct target_desc * | |
643 | core_read_description (struct target_ops *target) | |
644 | { | |
645 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
646 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
647 | ||
648 | return NULL; | |
649 | } | |
650 | ||
c906108c SS |
651 | /* Fill in core_ops with its defined operations and properties. */ |
652 | ||
653 | static void | |
fba45db2 | 654 | init_core_ops (void) |
c906108c SS |
655 | { |
656 | core_ops.to_shortname = "core"; | |
657 | core_ops.to_longname = "Local core dump file"; | |
658 | core_ops.to_doc = | |
659 | "Use a core file as a target. Specify the filename of the core file."; | |
660 | core_ops.to_open = core_open; | |
661 | core_ops.to_close = core_close; | |
662 | core_ops.to_attach = find_default_attach; | |
c906108c | 663 | core_ops.to_detach = core_detach; |
c906108c | 664 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 665 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 666 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
667 | core_ops.to_files_info = core_files_info; |
668 | core_ops.to_insert_breakpoint = ignore; | |
669 | core_ops.to_remove_breakpoint = ignore; | |
670 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 671 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 672 | core_ops.to_read_description = core_read_description; |
c906108c SS |
673 | core_ops.to_stratum = core_stratum; |
674 | core_ops.to_has_memory = 1; | |
675 | core_ops.to_has_stack = 1; | |
676 | core_ops.to_has_registers = 1; | |
c5aa993b | 677 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
678 | } |
679 | ||
680 | /* non-zero if we should not do the add_target call in | |
681 | _initialize_corelow; not initialized (i.e., bss) so that | |
682 | the target can initialize it (i.e., data) if appropriate. | |
683 | This needs to be set at compile time because we don't know | |
684 | for sure whether the target's initialize routine is called | |
685 | before us or after us. */ | |
686 | int coreops_suppress_target; | |
687 | ||
688 | void | |
fba45db2 | 689 | _initialize_corelow (void) |
c906108c SS |
690 | { |
691 | init_core_ops (); | |
692 | ||
693 | if (!coreops_suppress_target) | |
694 | add_target (&core_ops); | |
695 | } |