Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Core dump and executable file functions below target vector, for GDB. |
4646aa9d AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, | |
961cb7b5 MK |
4 | 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 |
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 | |
11 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
0e24ac5d | 25 | #include "arch-utils.h" |
c906108c SS |
26 | #include "gdb_string.h" |
27 | #include <errno.h> | |
28 | #include <signal.h> | |
29 | #include <fcntl.h> | |
fc24370e MS |
30 | #ifdef HAVE_SYS_FILE_H |
31 | #include <sys/file.h> /* needed for F_OK and friends */ | |
32 | #endif | |
c5aa993b | 33 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
34 | #include "inferior.h" |
35 | #include "symtab.h" | |
36 | #include "command.h" | |
37 | #include "bfd.h" | |
38 | #include "target.h" | |
39 | #include "gdbcore.h" | |
40 | #include "gdbthread.h" | |
4e052eda | 41 | #include "regcache.h" |
0e24ac5d | 42 | #include "regset.h" |
990f9fe3 | 43 | #include "symfile.h" |
4646aa9d | 44 | #include "exec.h" |
dbda9972 | 45 | #include "readline/readline.h" |
20d2ca3e | 46 | #include "observer.h" |
0e24ac5d | 47 | #include "gdb_assert.h" |
60250e8b | 48 | #include "exceptions.h" |
a77053c2 | 49 | #include "solib.h" |
0e24ac5d | 50 | |
8e860359 CF |
51 | #ifndef O_BINARY |
52 | #define O_BINARY 0 | |
53 | #endif | |
54 | ||
ee28ca0f AC |
55 | #ifndef O_LARGEFILE |
56 | #define O_LARGEFILE 0 | |
57 | #endif | |
58 | ||
00e32a35 AC |
59 | /* List of all available core_fns. On gdb startup, each core file |
60 | register reader calls deprecated_add_core_fns() to register | |
61 | information on each core format it is prepared to read. */ | |
c906108c SS |
62 | |
63 | static struct core_fns *core_file_fns = NULL; | |
64 | ||
2acceee2 JM |
65 | /* The core_fns for a core file handler that is prepared to read the core |
66 | file currently open on core_bfd. */ | |
67 | ||
68 | static struct core_fns *core_vec = NULL; | |
69 | ||
0e24ac5d MK |
70 | /* FIXME: kettenis/20031023: Eventually this variable should |
71 | disappear. */ | |
72 | ||
73 | struct gdbarch *core_gdbarch = NULL; | |
74 | ||
a14ed312 | 75 | static void core_files_info (struct target_ops *); |
c906108c | 76 | |
a14ed312 | 77 | static struct core_fns *sniff_core_bfd (bfd *); |
2acceee2 | 78 | |
020cc13c | 79 | static int gdb_check_format (bfd *); |
2acceee2 | 80 | |
a14ed312 | 81 | static void core_open (char *, int); |
c906108c | 82 | |
a14ed312 | 83 | static void core_detach (char *, int); |
c906108c | 84 | |
a14ed312 | 85 | static void core_close (int); |
c906108c | 86 | |
74b7792f AC |
87 | static void core_close_cleanup (void *ignore); |
88 | ||
a14ed312 | 89 | static void get_core_registers (int); |
c906108c | 90 | |
4efb68b1 | 91 | static void add_to_thread_list (bfd *, asection *, void *); |
c906108c | 92 | |
5a168c78 | 93 | static int ignore (CORE_ADDR, bfd_byte *); |
c906108c | 94 | |
39f77062 | 95 | static int core_file_thread_alive (ptid_t tid); |
c906108c | 96 | |
a14ed312 | 97 | static void init_core_ops (void); |
c906108c | 98 | |
a14ed312 | 99 | void _initialize_corelow (void); |
c906108c SS |
100 | |
101 | struct target_ops core_ops; | |
102 | ||
103 | /* Link a new core_fns into the global core_file_fns list. Called on gdb | |
104 | startup by the _initialize routine in each core file register reader, to | |
105 | register information about each format the the reader is prepared to | |
106 | handle. */ | |
107 | ||
108 | void | |
00e32a35 | 109 | deprecated_add_core_fns (struct core_fns *cf) |
c906108c | 110 | { |
c5aa993b | 111 | cf->next = core_file_fns; |
c906108c SS |
112 | core_file_fns = cf; |
113 | } | |
114 | ||
2acceee2 JM |
115 | /* The default function that core file handlers can use to examine a |
116 | core file BFD and decide whether or not to accept the job of | |
117 | reading the core file. */ | |
118 | ||
119 | int | |
fba45db2 | 120 | default_core_sniffer (struct core_fns *our_fns, bfd *abfd) |
2acceee2 JM |
121 | { |
122 | int result; | |
123 | ||
124 | result = (bfd_get_flavour (abfd) == our_fns -> core_flavour); | |
125 | return (result); | |
126 | } | |
127 | ||
128 | /* Walk through the list of core functions to find a set that can | |
129 | handle the core file open on ABFD. Default to the first one in the | |
ee923081 | 130 | list if nothing matches. Returns pointer to set that is |
2acceee2 JM |
131 | selected. */ |
132 | ||
133 | static struct core_fns * | |
fba45db2 | 134 | sniff_core_bfd (bfd *abfd) |
2acceee2 JM |
135 | { |
136 | struct core_fns *cf; | |
137 | struct core_fns *yummy = NULL; | |
138 | int matches = 0;; | |
139 | ||
0e24ac5d MK |
140 | /* Don't sniff if we have support for register sets in CORE_GDBARCH. */ |
141 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) | |
142 | return NULL; | |
143 | ||
2acceee2 JM |
144 | for (cf = core_file_fns; cf != NULL; cf = cf->next) |
145 | { | |
146 | if (cf->core_sniffer (cf, abfd)) | |
147 | { | |
148 | yummy = cf; | |
149 | matches++; | |
150 | } | |
151 | } | |
152 | if (matches > 1) | |
153 | { | |
8a3fe4f8 | 154 | warning (_("\"%s\": ambiguous core format, %d handlers match"), |
2acceee2 JM |
155 | bfd_get_filename (abfd), matches); |
156 | } | |
157 | else if (matches == 0) | |
158 | { | |
8a3fe4f8 | 159 | warning (_("\"%s\": no core file handler recognizes format, using default"), |
2acceee2 JM |
160 | bfd_get_filename (abfd)); |
161 | } | |
162 | if (yummy == NULL) | |
163 | { | |
164 | yummy = core_file_fns; | |
165 | } | |
166 | return (yummy); | |
167 | } | |
168 | ||
169 | /* The default is to reject every core file format we see. Either | |
170 | BFD has to recognize it, or we have to provide a function in the | |
171 | core file handler that recognizes it. */ | |
172 | ||
173 | int | |
fba45db2 | 174 | default_check_format (bfd *abfd) |
2acceee2 JM |
175 | { |
176 | return (0); | |
177 | } | |
178 | ||
179 | /* Attempt to recognize core file formats that BFD rejects. */ | |
180 | ||
020cc13c | 181 | static int |
fba45db2 | 182 | gdb_check_format (bfd *abfd) |
2acceee2 JM |
183 | { |
184 | struct core_fns *cf; | |
185 | ||
186 | for (cf = core_file_fns; cf != NULL; cf = cf->next) | |
187 | { | |
188 | if (cf->check_format (abfd)) | |
189 | { | |
81a9a963 | 190 | return (1); |
2acceee2 JM |
191 | } |
192 | } | |
81a9a963 | 193 | return (0); |
2acceee2 | 194 | } |
c906108c SS |
195 | |
196 | /* Discard all vestiges of any previous core file and mark data and stack | |
197 | spaces as empty. */ | |
198 | ||
c906108c | 199 | static void |
fba45db2 | 200 | core_close (int quitting) |
c906108c SS |
201 | { |
202 | char *name; | |
203 | ||
204 | if (core_bfd) | |
205 | { | |
39f77062 | 206 | inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */ |
c906108c | 207 | |
7a292a7a | 208 | /* Clear out solib state while the bfd is still open. See |
c5aa993b | 209 | comments in clear_solib in solib.c. */ |
7a292a7a SS |
210 | #ifdef CLEAR_SOLIB |
211 | CLEAR_SOLIB (); | |
a77053c2 MK |
212 | #else |
213 | clear_solib (); | |
7a292a7a SS |
214 | #endif |
215 | ||
c906108c SS |
216 | name = bfd_get_filename (core_bfd); |
217 | if (!bfd_close (core_bfd)) | |
8a3fe4f8 | 218 | warning (_("cannot close \"%s\": %s"), |
c906108c | 219 | name, bfd_errmsg (bfd_get_error ())); |
b8c9b27d | 220 | xfree (name); |
c906108c | 221 | core_bfd = NULL; |
c906108c SS |
222 | if (core_ops.to_sections) |
223 | { | |
b8c9b27d | 224 | xfree (core_ops.to_sections); |
c906108c SS |
225 | core_ops.to_sections = NULL; |
226 | core_ops.to_sections_end = NULL; | |
227 | } | |
228 | } | |
2acceee2 | 229 | core_vec = NULL; |
0e24ac5d | 230 | core_gdbarch = NULL; |
c906108c SS |
231 | } |
232 | ||
74b7792f AC |
233 | static void |
234 | core_close_cleanup (void *ignore) | |
235 | { | |
236 | core_close (0/*ignored*/); | |
237 | } | |
238 | ||
c906108c SS |
239 | /* Stub function for catch_errors around shared library hacking. FROM_TTYP |
240 | is really an int * which points to from_tty. */ | |
241 | ||
c5aa993b | 242 | static int |
4efb68b1 | 243 | solib_add_stub (void *from_ttyp) |
c906108c | 244 | { |
a77053c2 | 245 | #ifdef SOLIB_ADD |
990f9fe3 | 246 | SOLIB_ADD (NULL, *(int *) from_ttyp, ¤t_target, auto_solib_add); |
a77053c2 MK |
247 | #else |
248 | solib_add (NULL, *(int *)from_ttyp, ¤t_target, auto_solib_add); | |
249 | #endif | |
c906108c SS |
250 | re_enable_breakpoints_in_shlibs (); |
251 | return 0; | |
252 | } | |
c906108c SS |
253 | |
254 | /* Look for sections whose names start with `.reg/' so that we can extract the | |
255 | list of threads in a core file. */ | |
256 | ||
257 | static void | |
4efb68b1 | 258 | add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg) |
c906108c SS |
259 | { |
260 | int thread_id; | |
261 | asection *reg_sect = (asection *) reg_sect_arg; | |
262 | ||
263 | if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0) | |
264 | return; | |
265 | ||
266 | thread_id = atoi (bfd_section_name (abfd, asect) + 5); | |
267 | ||
39f77062 | 268 | add_thread (pid_to_ptid (thread_id)); |
c906108c SS |
269 | |
270 | /* Warning, Will Robinson, looking at BFD private data! */ | |
271 | ||
272 | if (reg_sect != NULL | |
c5aa993b | 273 | && asect->filepos == reg_sect->filepos) /* Did we find .reg? */ |
39f77062 | 274 | inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ |
c906108c SS |
275 | } |
276 | ||
277 | /* This routine opens and sets up the core file bfd. */ | |
278 | ||
279 | static void | |
fba45db2 | 280 | core_open (char *filename, int from_tty) |
c906108c SS |
281 | { |
282 | const char *p; | |
283 | int siggy; | |
284 | struct cleanup *old_chain; | |
285 | char *temp; | |
286 | bfd *temp_bfd; | |
287 | int ontop; | |
288 | int scratch_chan; | |
ee28ca0f | 289 | int flags; |
c906108c SS |
290 | |
291 | target_preopen (from_tty); | |
292 | if (!filename) | |
293 | { | |
8a3fe4f8 AC |
294 | if (core_bfd) |
295 | error (_("No core file specified. (Use `detach' to stop debugging a core file.)")); | |
296 | else | |
297 | error (_("No core file specified.")); | |
c906108c SS |
298 | } |
299 | ||
300 | filename = tilde_expand (filename); | |
301 | if (filename[0] != '/') | |
302 | { | |
1754f103 | 303 | temp = concat (current_directory, "/", filename, (char *)NULL); |
b8c9b27d | 304 | xfree (filename); |
c906108c SS |
305 | filename = temp; |
306 | } | |
307 | ||
b8c9b27d | 308 | old_chain = make_cleanup (xfree, filename); |
c906108c | 309 | |
ee28ca0f AC |
310 | flags = O_BINARY | O_LARGEFILE; |
311 | if (write_files) | |
312 | flags |= O_RDWR; | |
313 | else | |
314 | flags |= O_RDONLY; | |
315 | scratch_chan = open (filename, flags, 0); | |
c906108c SS |
316 | if (scratch_chan < 0) |
317 | perror_with_name (filename); | |
318 | ||
9f76c2cd MM |
319 | temp_bfd = bfd_fopen (filename, gnutarget, |
320 | write_files ? FOPEN_RUB : FOPEN_RB, | |
321 | scratch_chan); | |
c906108c SS |
322 | if (temp_bfd == NULL) |
323 | perror_with_name (filename); | |
324 | ||
2acceee2 JM |
325 | if (!bfd_check_format (temp_bfd, bfd_core) && |
326 | !gdb_check_format (temp_bfd)) | |
c906108c SS |
327 | { |
328 | /* Do it after the err msg */ | |
329 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
330 | on error it does not free all the storage associated with the |
331 | bfd). */ | |
5c65bbb6 | 332 | make_cleanup_bfd_close (temp_bfd); |
8a3fe4f8 | 333 | error (_("\"%s\" is not a core dump: %s"), |
c906108c SS |
334 | filename, bfd_errmsg (bfd_get_error ())); |
335 | } | |
336 | ||
337 | /* Looks semi-reasonable. Toss the old core file and work on the new. */ | |
338 | ||
c5aa993b | 339 | discard_cleanups (old_chain); /* Don't free filename any more */ |
c906108c SS |
340 | unpush_target (&core_ops); |
341 | core_bfd = temp_bfd; | |
74b7792f | 342 | old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); |
c906108c | 343 | |
0e24ac5d MK |
344 | /* FIXME: kettenis/20031023: This is very dangerous. The |
345 | CORE_GDBARCH that results from this call may very well be | |
346 | different from CURRENT_GDBARCH. However, its methods may only | |
347 | work if it is selected as the current architecture, because they | |
348 | rely on swapped data (see gdbarch.c). We should get rid of that | |
349 | swapped data. */ | |
350 | core_gdbarch = gdbarch_from_bfd (core_bfd); | |
351 | ||
2acceee2 JM |
352 | /* Find a suitable core file handler to munch on core_bfd */ |
353 | core_vec = sniff_core_bfd (core_bfd); | |
354 | ||
c906108c SS |
355 | validate_files (); |
356 | ||
357 | /* Find the data section */ | |
358 | if (build_section_table (core_bfd, &core_ops.to_sections, | |
359 | &core_ops.to_sections_end)) | |
8a3fe4f8 | 360 | error (_("\"%s\": Can't find sections: %s"), |
c906108c SS |
361 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); |
362 | ||
2f1b5984 MK |
363 | /* If we have no exec file, try to set the architecture from the |
364 | core file. We don't do this unconditionally since an exec file | |
365 | typically contains more information that helps us determine the | |
366 | architecture than a core file. */ | |
367 | if (!exec_bfd) | |
368 | set_gdbarch_from_file (core_bfd); | |
cbda0a99 | 369 | |
c906108c SS |
370 | ontop = !push_target (&core_ops); |
371 | discard_cleanups (old_chain); | |
372 | ||
20d2ca3e AC |
373 | /* This is done first, before anything has a chance to query the |
374 | inferior for information such as symbols. */ | |
375 | observer_notify_inferior_created (&core_ops, from_tty); | |
376 | ||
c906108c SS |
377 | p = bfd_core_file_failing_command (core_bfd); |
378 | if (p) | |
a3f17187 | 379 | printf_filtered (_("Core was generated by `%s'.\n"), p); |
c906108c SS |
380 | |
381 | siggy = bfd_core_file_failing_signal (core_bfd); | |
382 | if (siggy > 0) | |
8e6a3c35 | 383 | /* NOTE: target_signal_from_host() converts a target signal value |
e26cc349 | 384 | into gdb's internal signal value. Unfortunately gdb's internal |
8e6a3c35 AC |
385 | value is called ``target_signal'' and this function got the |
386 | name ..._from_host(). */ | |
a3f17187 | 387 | printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, |
8e6a3c35 | 388 | target_signal_to_string (target_signal_from_host (siggy))); |
c906108c SS |
389 | |
390 | /* Build up thread list from BFD sections. */ | |
391 | ||
392 | init_thread_list (); | |
393 | bfd_map_over_sections (core_bfd, add_to_thread_list, | |
394 | bfd_get_section_by_name (core_bfd, ".reg")); | |
395 | ||
396 | if (ontop) | |
397 | { | |
398 | /* Fetch all registers from core file. */ | |
399 | target_fetch_registers (-1); | |
400 | ||
401 | /* Add symbols and section mappings for any shared libraries. */ | |
a77053c2 | 402 | catch_errors (solib_add_stub, &from_tty, (char *) 0, RETURN_MASK_ALL); |
c906108c SS |
403 | |
404 | /* Now, set up the frame cache, and print the top of stack. */ | |
405 | flush_cached_frames (); | |
0f7d239c | 406 | select_frame (get_current_frame ()); |
b04f3ab4 | 407 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c906108c SS |
408 | } |
409 | else | |
410 | { | |
411 | warning ( | |
c5aa993b | 412 | "you won't be able to access this core file until you terminate\n\ |
c906108c SS |
413 | your %s; do ``info files''", target_longname); |
414 | } | |
415 | } | |
416 | ||
417 | static void | |
fba45db2 | 418 | core_detach (char *args, int from_tty) |
c906108c SS |
419 | { |
420 | if (args) | |
8a3fe4f8 | 421 | error (_("Too many arguments")); |
c906108c SS |
422 | unpush_target (&core_ops); |
423 | reinit_frame_cache (); | |
424 | if (from_tty) | |
a3f17187 | 425 | printf_filtered (_("No core file now.\n")); |
c906108c SS |
426 | } |
427 | ||
de57eccd JM |
428 | |
429 | /* Try to retrieve registers from a section in core_bfd, and supply | |
430 | them to core_vec->core_read_registers, as the register set numbered | |
431 | WHICH. | |
432 | ||
39f77062 KB |
433 | If inferior_ptid is zero, do the single-threaded thing: look for a |
434 | section named NAME. If inferior_ptid is non-zero, do the | |
de57eccd | 435 | multi-threaded thing: look for a section named "NAME/PID", where |
39f77062 | 436 | PID is the shortest ASCII decimal representation of inferior_ptid. |
de57eccd JM |
437 | |
438 | HUMAN_NAME is a human-readable name for the kind of registers the | |
439 | NAME section contains, for use in error messages. | |
440 | ||
441 | If REQUIRED is non-zero, print an error if the core file doesn't | |
442 | have a section by the appropriate name. Otherwise, just do nothing. */ | |
443 | ||
444 | static void | |
445 | get_core_register_section (char *name, | |
446 | int which, | |
447 | char *human_name, | |
448 | int required) | |
449 | { | |
3ecda457 | 450 | static char *section_name = NULL; |
7be0c536 | 451 | struct bfd_section *section; |
de57eccd JM |
452 | bfd_size_type size; |
453 | char *contents; | |
454 | ||
3ecda457 | 455 | xfree (section_name); |
39f77062 | 456 | if (PIDGET (inferior_ptid)) |
3ecda457 | 457 | section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid)); |
de57eccd | 458 | else |
3ecda457 | 459 | section_name = xstrdup (name); |
de57eccd JM |
460 | |
461 | section = bfd_get_section_by_name (core_bfd, section_name); | |
462 | if (! section) | |
463 | { | |
464 | if (required) | |
8a3fe4f8 | 465 | warning (_("Couldn't find %s registers in core file."), human_name); |
de57eccd JM |
466 | return; |
467 | } | |
468 | ||
469 | size = bfd_section_size (core_bfd, section); | |
470 | contents = alloca (size); | |
471 | if (! bfd_get_section_contents (core_bfd, section, contents, | |
472 | (file_ptr) 0, size)) | |
473 | { | |
8a3fe4f8 | 474 | warning (_("Couldn't read %s registers from `%s' section in core file."), |
de57eccd JM |
475 | human_name, name); |
476 | return; | |
477 | } | |
478 | ||
0e24ac5d MK |
479 | if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
480 | { | |
481 | const struct regset *regset; | |
482 | ||
483 | regset = gdbarch_regset_from_core_section (core_gdbarch, name, size); | |
484 | if (regset == NULL) | |
485 | { | |
486 | if (required) | |
8a3fe4f8 | 487 | warning (_("Couldn't recognize %s registers in core file."), |
0e24ac5d MK |
488 | human_name); |
489 | return; | |
490 | } | |
491 | ||
492 | regset->supply_regset (regset, current_regcache, -1, contents, size); | |
493 | return; | |
494 | } | |
495 | ||
496 | gdb_assert (core_vec); | |
e2544d02 | 497 | core_vec->core_read_registers (contents, size, which, |
de57eccd JM |
498 | ((CORE_ADDR) |
499 | bfd_section_vma (core_bfd, section))); | |
500 | } | |
501 | ||
502 | ||
c906108c SS |
503 | /* Get the registers out of a core file. This is the machine- |
504 | independent part. Fetch_core_registers is the machine-dependent | |
505 | part, typically implemented in the xm-file for each architecture. */ | |
506 | ||
507 | /* We just get all the registers, so we don't use regno. */ | |
508 | ||
c906108c | 509 | static void |
fba45db2 | 510 | get_core_registers (int regno) |
c906108c | 511 | { |
de57eccd | 512 | int status; |
c906108c | 513 | |
0e24ac5d MK |
514 | if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch)) |
515 | && (core_vec == NULL || core_vec->core_read_registers == NULL)) | |
c906108c SS |
516 | { |
517 | fprintf_filtered (gdb_stderr, | |
c5aa993b | 518 | "Can't fetch registers from this type of core file\n"); |
c906108c SS |
519 | return; |
520 | } | |
521 | ||
de57eccd JM |
522 | get_core_register_section (".reg", 0, "general-purpose", 1); |
523 | get_core_register_section (".reg2", 2, "floating-point", 0); | |
524 | get_core_register_section (".reg-xfp", 3, "extended floating-point", 0); | |
c906108c | 525 | |
2b9e5f3f | 526 | deprecated_registers_fetched (); |
c906108c SS |
527 | } |
528 | ||
c906108c | 529 | static void |
fba45db2 | 530 | core_files_info (struct target_ops *t) |
c906108c SS |
531 | { |
532 | print_section_info (t, core_bfd); | |
533 | } | |
e2544d02 RM |
534 | \f |
535 | static LONGEST | |
536 | core_xfer_partial (struct target_ops *ops, enum target_object object, | |
961cb7b5 MK |
537 | const char *annex, gdb_byte *readbuf, |
538 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
e2544d02 RM |
539 | { |
540 | switch (object) | |
541 | { | |
542 | case TARGET_OBJECT_MEMORY: | |
543 | if (readbuf) | |
c8e73a31 AC |
544 | return (*ops->deprecated_xfer_memory) (offset, readbuf, len, |
545 | 0/*write*/, NULL, ops); | |
e2544d02 | 546 | if (writebuf) |
c8e73a31 AC |
547 | return (*ops->deprecated_xfer_memory) (offset, readbuf, len, |
548 | 1/*write*/, NULL, ops); | |
e2544d02 RM |
549 | return -1; |
550 | ||
551 | case TARGET_OBJECT_AUXV: | |
552 | if (readbuf) | |
553 | { | |
554 | /* When the aux vector is stored in core file, BFD | |
555 | represents this with a fake section called ".auxv". */ | |
556 | ||
c4c5b7ba | 557 | struct bfd_section *section; |
e2544d02 RM |
558 | bfd_size_type size; |
559 | char *contents; | |
560 | ||
561 | section = bfd_get_section_by_name (core_bfd, ".auxv"); | |
562 | if (section == NULL) | |
563 | return -1; | |
564 | ||
565 | size = bfd_section_size (core_bfd, section); | |
566 | if (offset >= size) | |
567 | return 0; | |
568 | size -= offset; | |
569 | if (size > len) | |
570 | size = len; | |
403e1656 MK |
571 | if (size > 0 |
572 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
573 | (file_ptr) offset, size)) | |
e2544d02 | 574 | { |
8a3fe4f8 | 575 | warning (_("Couldn't read NT_AUXV note in core file.")); |
e2544d02 RM |
576 | return -1; |
577 | } | |
578 | ||
579 | return size; | |
580 | } | |
581 | return -1; | |
582 | ||
403e1656 MK |
583 | case TARGET_OBJECT_WCOOKIE: |
584 | if (readbuf) | |
585 | { | |
586 | /* When the StackGhost cookie is stored in core file, BFD | |
587 | represents this with a fake section called ".wcookie". */ | |
588 | ||
589 | struct bfd_section *section; | |
590 | bfd_size_type size; | |
591 | char *contents; | |
592 | ||
593 | section = bfd_get_section_by_name (core_bfd, ".wcookie"); | |
594 | if (section == NULL) | |
595 | return -1; | |
596 | ||
597 | size = bfd_section_size (core_bfd, section); | |
598 | if (offset >= size) | |
599 | return 0; | |
600 | size -= offset; | |
601 | if (size > len) | |
602 | size = len; | |
603 | if (size > 0 | |
604 | && !bfd_get_section_contents (core_bfd, section, readbuf, | |
605 | (file_ptr) offset, size)) | |
606 | { | |
8a3fe4f8 | 607 | warning (_("Couldn't read StackGhost cookie in core file.")); |
403e1656 MK |
608 | return -1; |
609 | } | |
610 | ||
611 | return size; | |
612 | } | |
613 | return -1; | |
614 | ||
e2544d02 RM |
615 | default: |
616 | if (ops->beneath != NULL) | |
617 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
618 | readbuf, writebuf, offset, len); | |
619 | return -1; | |
620 | } | |
621 | } | |
622 | ||
c906108c SS |
623 | \f |
624 | /* If mourn is being called in all the right places, this could be say | |
625 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ | |
626 | ||
627 | static int | |
5a168c78 | 628 | ignore (CORE_ADDR addr, bfd_byte *contents) |
c906108c SS |
629 | { |
630 | return 0; | |
631 | } | |
632 | ||
633 | ||
634 | /* Okay, let's be honest: threads gleaned from a core file aren't | |
635 | exactly lively, are they? On the other hand, if we don't claim | |
636 | that each & every one is alive, then we don't get any of them | |
637 | to appear in an "info thread" command, which is quite a useful | |
638 | behaviour. | |
c5aa993b | 639 | */ |
c906108c | 640 | static int |
39f77062 | 641 | core_file_thread_alive (ptid_t tid) |
c906108c SS |
642 | { |
643 | return 1; | |
644 | } | |
645 | ||
646 | /* Fill in core_ops with its defined operations and properties. */ | |
647 | ||
648 | static void | |
fba45db2 | 649 | init_core_ops (void) |
c906108c SS |
650 | { |
651 | core_ops.to_shortname = "core"; | |
652 | core_ops.to_longname = "Local core dump file"; | |
653 | core_ops.to_doc = | |
654 | "Use a core file as a target. Specify the filename of the core file."; | |
655 | core_ops.to_open = core_open; | |
656 | core_ops.to_close = core_close; | |
657 | core_ops.to_attach = find_default_attach; | |
c906108c | 658 | core_ops.to_detach = core_detach; |
c906108c | 659 | core_ops.to_fetch_registers = get_core_registers; |
e2544d02 | 660 | core_ops.to_xfer_partial = core_xfer_partial; |
c8e73a31 | 661 | core_ops.deprecated_xfer_memory = xfer_memory; |
c906108c SS |
662 | core_ops.to_files_info = core_files_info; |
663 | core_ops.to_insert_breakpoint = ignore; | |
664 | core_ops.to_remove_breakpoint = ignore; | |
665 | core_ops.to_create_inferior = find_default_create_inferior; | |
c906108c | 666 | core_ops.to_thread_alive = core_file_thread_alive; |
c906108c SS |
667 | core_ops.to_stratum = core_stratum; |
668 | core_ops.to_has_memory = 1; | |
669 | core_ops.to_has_stack = 1; | |
670 | core_ops.to_has_registers = 1; | |
c5aa993b | 671 | core_ops.to_magic = OPS_MAGIC; |
c906108c SS |
672 | } |
673 | ||
674 | /* non-zero if we should not do the add_target call in | |
675 | _initialize_corelow; not initialized (i.e., bss) so that | |
676 | the target can initialize it (i.e., data) if appropriate. | |
677 | This needs to be set at compile time because we don't know | |
678 | for sure whether the target's initialize routine is called | |
679 | before us or after us. */ | |
680 | int coreops_suppress_target; | |
681 | ||
682 | void | |
fba45db2 | 683 | _initialize_corelow (void) |
c906108c SS |
684 | { |
685 | init_core_ops (); | |
686 | ||
687 | if (!coreops_suppress_target) | |
688 | add_target (&core_ops); | |
689 | } |