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