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. */ |
a77053c2 | 202 | clear_solib (); |
7a292a7a | 203 | |
c906108c SS |
204 | name = bfd_get_filename (core_bfd); |
205 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 206 | warning (_("cannot close \"%s\": %s"), |
c906108c | 207 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 208 | xfree (name); |
c906108c | 209 | core_bfd = NULL; |
c906108c SS |
210 | if (core_ops.to_sections) |
211 | { | |
b8c9b27d | 212 | xfree (core_ops.to_sections); |
c906108c SS |
213 | core_ops.to_sections = NULL; |
214 | core_ops.to_sections_end = NULL; | |
215 | } | |
216 | } | |
2acceee2 | 217 | core_vec = NULL; |
0e24ac5d | 218 | core_gdbarch = NULL; |
c906108c SS |
219 | } |
220 | ||
74b7792f AC |
221 | static void |
222 | core_close_cleanup (void *ignore) | |
223 | { | |
224 | core_close (0/*ignored*/); | |
225 | } | |
226 | ||
c906108c SS |
227 | /* Look for sections whose names start with `.reg/' so that we can extract the |
228 | list of threads in a core file. */ | |
229 | ||
230 | static void | |
4efb68b1 | 231 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c SS |
232 | { |
233 | int thread_id; | |
234 | asection *reg_sect = (asection *) reg_sect_arg; | |
235 | ||
236 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
237 | return; | |
238 | ||
239 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
240 | ||
39f77062 | 241 | add_thread (pid_to_ptid (thread_id)); |
c906108c SS |
242 | |
243 | /* Warning, Will Robinson, looking at BFD private data! */ | |
244 | ||
245 | if (reg_sect != NULL | |
c5aa993b | 246 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
39f77062 | 247 | inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ |
c906108c SS |
248 | } |
249 | ||
250 | /* This routine opens and sets up the core file bfd. */ | |
251 | ||
252 | static void | |
fba45db2 | 253 | core_open (char *filename, int from_tty) |
c906108c SS |
254 | { |
255 | const char *p; | |
256 | int siggy; | |
257 | struct cleanup *old_chain; | |
258 | char *temp; | |
259 | bfd *temp_bfd; | |
260 | int ontop; | |
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); | |
274 | if (filename[0] != '/') | |
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 | |
c906108c SS |
343 | ontop = !push_target (&core_ops); |
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, |
8e6a3c35 | 361 | target_signal_to_string (target_signal_from_host (siggy))); |
c906108c SS |
362 | |
363 | /* Build up thread list from BFD sections. */ | |
364 | ||
365 | init_thread_list (); | |
366 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
367 | bfd_get_section_by_name (core_bfd, ".reg")); | |
368 | ||
369 | if (ontop) | |
370 | { | |
371 | /* Fetch all registers from core file. */ | |
594f7785 | 372 | target_fetch_registers (get_current_regcache (), -1); |
c906108c | 373 | |
c906108c | 374 | /* Now, set up the frame cache, and print the top of stack. */ |
35f196d9 | 375 | reinit_frame_cache (); |
b04f3ab4 | 376 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c906108c SS |
377 | } |
378 | else | |
379 | { | |
380 | warning ( | |
c5aa993b | 381 | "you won't be able to access this core file until you terminate\n\ |
c906108c SS |
382 | your %s; do ``info files''", target_longname); |
383 | } | |
384 | } | |
385 | ||
386 | static void | |
fba45db2 | 387 | core_detach (char *args, int from_tty) |
c906108c SS |
388 | { |
389 | if (args) | |
8a3fe4f8 | 390 | error (_("Too many arguments")); |
c906108c SS |
391 | unpush_target (&core_ops); |
392 | reinit_frame_cache (); | |
393 | if (from_tty) | |
a3f17187 | 394 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
395 | } |
396 | ||
de57eccd JM |
397 | |
398 | /* Try to retrieve registers from a section in core_bfd, and supply | |
399 | them to core_vec->core_read_registers, as the register set numbered | |
400 | WHICH. | |
401 | ||
39f77062 KB |
402 | If inferior_ptid is zero, do the single-threaded thing: look for a |
403 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 404 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 405 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
406 | |
407 | HUMAN_NAME is a human-readable name for the kind of registers the | |
408 | NAME section contains, for use in error messages. | |
409 | ||
410 | If REQUIRED is non-zero, print an error if the core file doesn't | |
411 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
412 | ||
413 | static void | |
9eefc95f UW |
414 | get_core_register_section (struct regcache *regcache, |
415 | char *name, | |
de57eccd JM |
416 | int which, |
417 | char *human_name, | |
418 | int required) | |
419 | { | |
3ecda457 | 420 | static char *section_name = NULL; |
7be0c536 | 421 | struct bfd_section *section; |
de57eccd JM |
422 | bfd_size_type size; |
423 | char *contents; | |
424 | ||
3ecda457 | 425 | xfree (section_name); |
39f77062 | 426 | if (PIDGET (inferior_ptid)) |
3ecda457 | 427 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 428 | else |
3ecda457 | 429 | section_name = xstrdup (name); |
de57eccd JM |
430 | |
431 | section = bfd_get_section_by_name (core_bfd, section_name); | |
432 | if (! section) | |
433 | { | |
434 | if (required) | |
8a3fe4f8 | 435 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
436 | return; |
437 | } | |
438 | ||
439 | size = bfd_section_size (core_bfd, section); | |
440 | contents = alloca (size); | |
441 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
442 | (file_ptr) 0, size)) | |
443 | { | |
8a3fe4f8 | 444 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
445 | human_name, name); |
446 | return; | |
447 | } | |
448 | ||
0e24ac5d MK |
449 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
450 | { | |
451 | const struct regset *regset; | |
452 | ||
453 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
454 | if (regset == NULL) | |
455 | { | |
456 | if (required) | |
8a3fe4f8 | 457 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
458 | human_name); |
459 | return; | |
460 | } | |
461 | ||
9eefc95f | 462 | regset->supply_regset (regset, regcache, -1, contents, size); |
0e24ac5d MK |
463 | return; |
464 | } | |
465 | ||
466 | gdb_assert (core_vec); | |
9eefc95f | 467 | core_vec->core_read_registers (regcache, contents, size, which, |
de57eccd JM |
468 | ((CORE_ADDR) |
469 | bfd_section_vma (core_bfd, section))); | |
470 | } | |
471 | ||
472 | ||
c906108c SS |
473 | /* Get the registers out of a core file. This is the machine- |
474 | independent part. Fetch_core_registers is the machine-dependent | |
475 | part, typically implemented in the xm-file for each architecture. */ | |
476 | ||
477 | /* We just get all the registers, so we don't use regno. */ | |
478 | ||
c906108c | 479 | static void |
56be3814 | 480 | get_core_registers (struct regcache *regcache, int regno) |
c906108c | 481 | { |
9c5ea4d9 | 482 | int i; |
c906108c | 483 | |
0e24ac5d MK |
484 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
485 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
486 | { |
487 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 488 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
489 | return; |
490 | } | |
491 | ||
56be3814 | 492 | get_core_register_section (regcache, |
9eefc95f | 493 | ".reg", 0, "general-purpose", 1); |
56be3814 | 494 | get_core_register_section (regcache, |
9eefc95f | 495 | ".reg2", 2, "floating-point", 0); |
56be3814 | 496 | get_core_register_section (regcache, |
9eefc95f | 497 | ".reg-xfp", 3, "extended floating-point", 0); |
06caf7d2 CES |
498 | get_core_register_section (regcache, |
499 | ".reg-ppc-vmx", 3, "ppc Altivec", 0); | |
c906108c | 500 | |
9c5ea4d9 | 501 | /* Supply dummy value for all registers not found in the core. */ |
13b8769f | 502 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
9c5ea4d9 UW |
503 | if (!regcache_valid_p (regcache, i)) |
504 | regcache_raw_supply (regcache, i, NULL); | |
c906108c SS |
505 | } |
506 | ||
c906108c | 507 | static void |
fba45db2 | 508 | core_files_info (struct target_ops *t) |
c906108c SS |
509 | { |
510 | print_section_info (t, core_bfd); | |
511 | } | |
e2544d02 RM |
512 | \f |
513 | static LONGEST | |
514 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
515 | const char *annex, gdb_byte *readbuf, |
516 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
517 | { |
518 | switch (object) | |
519 | { | |
520 | case TARGET_OBJECT_MEMORY: | |
521 | if (readbuf) | |
7160c4c3 PA |
522 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
523 | len, 0/*write*/, NULL, ops); | |
e2544d02 | 524 | if (writebuf) |
7160c4c3 PA |
525 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
526 | len, 1/*write*/, NULL, ops); | |
e2544d02 RM |
527 | return -1; |
528 | ||
529 | case TARGET_OBJECT_AUXV: | |
530 | if (readbuf) | |
531 | { | |
532 | /* When the aux vector is stored in core file, BFD | |
533 | represents this with a fake section called ".auxv". */ | |
534 | ||
c4c5b7ba | 535 | struct bfd_section *section; |
e2544d02 RM |
536 | bfd_size_type size; |
537 | char *contents; | |
538 | ||
539 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
540 | if (section == NULL) | |
541 | return -1; | |
542 | ||
543 | size = bfd_section_size (core_bfd, section); | |
544 | if (offset >= size) | |
545 | return 0; | |
546 | size -= offset; | |
547 | if (size > len) | |
548 | size = len; | |
403e1656 MK |
549 | if (size > 0 |
550 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
551 | (file_ptr) offset, size)) | |
e2544d02 | 552 | { |
8a3fe4f8 | 553 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
554 | return -1; |
555 | } | |
556 | ||
557 | return size; | |
558 | } | |
559 | return -1; | |
560 | ||
403e1656 MK |
561 | case TARGET_OBJECT_WCOOKIE: |
562 | if (readbuf) | |
563 | { | |
564 | /* When the StackGhost cookie is stored in core file, BFD | |
565 | represents this with a fake section called ".wcookie". */ | |
566 | ||
567 | struct bfd_section *section; | |
568 | bfd_size_type size; | |
569 | char *contents; | |
570 | ||
571 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
572 | if (section == NULL) | |
573 | return -1; | |
574 | ||
575 | size = bfd_section_size (core_bfd, section); | |
576 | if (offset >= size) | |
577 | return 0; | |
578 | size -= offset; | |
579 | if (size > len) | |
580 | size = len; | |
581 | if (size > 0 | |
582 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
583 | (file_ptr) offset, size)) | |
584 | { | |
8a3fe4f8 | 585 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
586 | return -1; |
587 | } | |
588 | ||
589 | return size; | |
590 | } | |
591 | return -1; | |
592 | ||
de584861 PA |
593 | case TARGET_OBJECT_LIBRARIES: |
594 | if (core_gdbarch | |
595 | && gdbarch_core_xfer_shared_libraries_p (core_gdbarch)) | |
596 | { | |
597 | if (writebuf) | |
598 | return -1; | |
599 | return | |
600 | gdbarch_core_xfer_shared_libraries (core_gdbarch, | |
601 | readbuf, offset, len); | |
602 | } | |
603 | /* FALL THROUGH */ | |
604 | ||
e2544d02 RM |
605 | default: |
606 | if (ops->beneath != NULL) | |
607 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
608 | readbuf, writebuf, offset, len); | |
609 | return -1; | |
610 | } | |
611 | } | |
612 | ||
c906108c SS |
613 | \f |
614 | /* If mourn is being called in all the right places, this could be say | |
615 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
616 | ||
617 | static int | |
8181d85f | 618 | ignore (struct bp_target_info *bp_tgt) |
c906108c SS |
619 | { |
620 | return 0; | |
621 | } | |
622 | ||
623 | ||
624 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
625 | exactly lively, are they? On the other hand, if we don't claim | |
626 | that each & every one is alive, then we don't get any of them | |
627 | to appear in an "info thread" command, which is quite a useful | |
628 | behaviour. | |
c5aa993b | 629 | */ |
c906108c | 630 | static int |
39f77062 | 631 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
632 | { |
633 | return 1; | |
634 | } | |
635 | ||
4eb0ad19 DJ |
636 | /* Ask the current architecture what it knows about this core file. |
637 | That will be used, in turn, to pick a better architecture. This | |
638 | wrapper could be avoided if targets got a chance to specialize | |
639 | core_ops. */ | |
640 | ||
641 | static const struct target_desc * | |
642 | core_read_description (struct target_ops *target) | |
643 | { | |
644 | if (gdbarch_core_read_description_p (current_gdbarch)) | |
645 | return gdbarch_core_read_description (current_gdbarch, target, core_bfd); | |
646 | ||
647 | return NULL; | |
648 | } | |
649 | ||
c906108c SS |
650 | /* Fill in core_ops with its defined operations and properties. */ |
651 | ||
652 | static void | |
fba45db2 | 653 | init_core_ops (void) |
c906108c SS |
654 | { |
655 | core_ops.to_shortname = "core"; | |
656 | core_ops.to_longname = "Local core dump file"; | |
657 | core_ops.to_doc = | |
658 | "Use a core file as a target. Specify the filename of the core file."; | |
659 | core_ops.to_open = core_open; | |
660 | core_ops.to_close = core_close; | |
661 | core_ops.to_attach = find_default_attach; | |
c906108c | 662 | core_ops.to_detach = core_detach; |
c906108c | 663 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 664 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 665 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
666 | core_ops.to_files_info = core_files_info; |
667 | core_ops.to_insert_breakpoint = ignore; | |
668 | core_ops.to_remove_breakpoint = ignore; | |
669 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 670 | core_ops.to_thread_alive = core_file_thread_alive; |
4eb0ad19 | 671 | core_ops.to_read_description = core_read_description; |
c906108c SS |
672 | core_ops.to_stratum = core_stratum; |
673 | core_ops.to_has_memory = 1; | |
674 | core_ops.to_has_stack = 1; | |
675 | core_ops.to_has_registers = 1; | |
c5aa993b | 676 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
677 | } |
678 | ||
679 | /* non-zero if we should not do the add_target call in | |
680 | _initialize_corelow; not initialized (i.e., bss) so that | |
681 | the target can initialize it (i.e., data) if appropriate. | |
682 | This needs to be set at compile time because we don't know | |
683 | for sure whether the target's initialize routine is called | |
684 | before us or after us. */ | |
685 | int coreops_suppress_target; | |
686 | ||
687 | void | |
fba45db2 | 688 | _initialize_corelow (void) |
c906108c SS |
689 | { |
690 | init_core_ops (); | |
691 | ||
692 | if (!coreops_suppress_target) | |
693 | add_target (&core_ops); | |
694 | } |