Commit | Line | Data |
---|---|---|
be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
28e7fd62 | 3 | Copyright (C) 2001-2013 Free Software Foundation, Inc. |
be4d1333 MS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
be4d1333 MS |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
be4d1333 MS |
19 | |
20 | #include "defs.h" | |
d3420b2f MK |
21 | #include "elf-bfd.h" |
22 | #include "infcall.h" | |
be4d1333 MS |
23 | #include "inferior.h" |
24 | #include "gdbcore.h" | |
be4d1333 | 25 | #include "objfiles.h" |
de18c1d8 | 26 | #include "solib.h" |
d3420b2f | 27 | #include "symfile.h" |
0156b218 MS |
28 | #include "arch-utils.h" |
29 | #include "completer.h" | |
30 | #include "gcore.h" | |
d3420b2f | 31 | #include "cli/cli-decode.h" |
d3420b2f | 32 | #include "gdb_assert.h" |
0156b218 MS |
33 | #include <fcntl.h> |
34 | #include "regcache.h" | |
35 | #include "regset.h" | |
cbb099e8 | 36 | #include "gdb_bfd.h" |
47ecca85 | 37 | #include "readline/tilde.h" |
be4d1333 | 38 | |
804e0f53 DJ |
39 | /* The largest amount of memory to read from the target at once. We |
40 | must throttle it to limit the amount of memory used by GDB during | |
41 | generate-core-file for programs with large resident data. */ | |
42 | #define MAX_COPY_BYTES (1024 * 1024) | |
43 | ||
a78c2d62 | 44 | static const char *default_gcore_target (void); |
d3420b2f MK |
45 | static enum bfd_architecture default_gcore_arch (void); |
46 | static unsigned long default_gcore_mach (void); | |
47 | static int gcore_memory_sections (bfd *); | |
48 | ||
0156b218 MS |
49 | /* create_gcore_bfd -- helper for gcore_command (exported). |
50 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 51 | |
0156b218 | 52 | bfd * |
85e1311a | 53 | create_gcore_bfd (const char *filename) |
be4d1333 | 54 | { |
1e351ed1 | 55 | bfd *obfd = gdb_bfd_openw (filename, default_gcore_target ()); |
d8734c88 | 56 | |
d3420b2f | 57 | if (!obfd) |
0156b218 | 58 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
59 | bfd_set_format (obfd, bfd_core); |
60 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
61 | return obfd; |
62 | } | |
63 | ||
64 | /* write_gcore_file -- helper for gcore_command (exported). | |
65 | Compose and write the corefile data to the core file. */ | |
66 | ||
67 | ||
68 | void | |
69 | write_gcore_file (bfd *obfd) | |
70 | { | |
71 | void *note_data = NULL; | |
72 | int note_size = 0; | |
73 | asection *note_sec = NULL; | |
be4d1333 | 74 | |
d3420b2f | 75 | /* An external target method must build the notes section. */ |
6432734d UW |
76 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
77 | generation should be converted to gdbarch_make_corefile_notes; at that | |
78 | point, the target vector method can be removed. */ | |
f5656ead | 79 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
6432734d UW |
80 | note_data = target_make_corefile_notes (obfd, ¬e_size); |
81 | else | |
f5656ead | 82 | note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); |
6432734d UW |
83 | |
84 | if (note_data == NULL || note_size == 0) | |
85 | error (_("Target does not support core file generation.")); | |
be4d1333 | 86 | |
d3420b2f | 87 | /* Create the note section. */ |
6432734d UW |
88 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
89 | SEC_HAS_CONTENTS | |
90 | | SEC_READONLY | |
91 | | SEC_ALLOC); | |
92 | if (note_sec == NULL) | |
93 | error (_("Failed to create 'note' section for corefile: %s"), | |
94 | bfd_errmsg (bfd_get_error ())); | |
95 | ||
96 | bfd_set_section_vma (obfd, note_sec, 0); | |
97 | bfd_set_section_alignment (obfd, note_sec, 0); | |
98 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 99 | |
d3420b2f | 100 | /* Now create the memory/load sections. */ |
be4d1333 | 101 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 102 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 103 | |
d3420b2f | 104 | /* Write out the contents of the note section. */ |
6432734d UW |
105 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
106 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
0156b218 MS |
107 | } |
108 | ||
14d1346b DJ |
109 | static void |
110 | do_bfd_delete_cleanup (void *arg) | |
111 | { | |
112 | bfd *obfd = arg; | |
113 | const char *filename = obfd->filename; | |
114 | ||
cbb099e8 | 115 | gdb_bfd_unref (arg); |
14d1346b DJ |
116 | unlink (filename); |
117 | } | |
118 | ||
0156b218 MS |
119 | /* gcore_command -- implements the 'gcore' command. |
120 | Generate a core file from the inferior process. */ | |
121 | ||
122 | static void | |
123 | gcore_command (char *args, int from_tty) | |
124 | { | |
1e351ed1 PA |
125 | struct cleanup *filename_chain; |
126 | struct cleanup *bfd_chain; | |
127 | char *corefilename; | |
0156b218 MS |
128 | bfd *obfd; |
129 | ||
130 | /* No use generating a corefile without a target process. */ | |
131 | if (!target_has_execution) | |
132 | noprocess (); | |
133 | ||
134 | if (args && *args) | |
1e351ed1 | 135 | corefilename = tilde_expand (args); |
0156b218 MS |
136 | else |
137 | { | |
138 | /* Default corefile name is "core.PID". */ | |
dfd4cc63 | 139 | corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid)); |
be4d1333 | 140 | } |
1e351ed1 | 141 | filename_chain = make_cleanup (xfree, corefilename); |
be4d1333 | 142 | |
0156b218 MS |
143 | if (info_verbose) |
144 | fprintf_filtered (gdb_stdout, | |
145 | "Opening corefile '%s' for output.\n", corefilename); | |
146 | ||
147 | /* Open the output file. */ | |
148 | obfd = create_gcore_bfd (corefilename); | |
149 | ||
14d1346b | 150 | /* Need a cleanup that will close and delete the file. */ |
1e351ed1 | 151 | bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd); |
0156b218 MS |
152 | |
153 | /* Call worker function. */ | |
154 | write_gcore_file (obfd); | |
155 | ||
d3420b2f | 156 | /* Succeeded. */ |
1e351ed1 | 157 | discard_cleanups (bfd_chain); |
cbb099e8 | 158 | gdb_bfd_unref (obfd); |
1e351ed1 PA |
159 | |
160 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
161 | do_cleanups (filename_chain); | |
be4d1333 MS |
162 | } |
163 | ||
164 | static unsigned long | |
165 | default_gcore_mach (void) | |
166 | { | |
d3420b2f | 167 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
168 | return 0; |
169 | #else | |
1143fffb | 170 | |
f5656ead | 171 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
172 | |
173 | if (bfdarch != NULL) | |
174 | return bfdarch->mach; | |
be4d1333 | 175 | if (exec_bfd == NULL) |
8a3fe4f8 | 176 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
177 | |
178 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 179 | #endif /* 1 */ |
be4d1333 MS |
180 | } |
181 | ||
182 | static enum bfd_architecture | |
183 | default_gcore_arch (void) | |
184 | { | |
f5656ead | 185 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
186 | |
187 | if (bfdarch != NULL) | |
188 | return bfdarch->arch; | |
be4d1333 | 189 | if (exec_bfd == NULL) |
8a3fe4f8 | 190 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
191 | |
192 | return bfd_get_arch (exec_bfd); | |
193 | } | |
194 | ||
a78c2d62 | 195 | static const char * |
be4d1333 MS |
196 | default_gcore_target (void) |
197 | { | |
a78c2d62 | 198 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
199 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
200 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
201 | |
202 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
203 | not work for non-ELF targets. */ | |
be4d1333 | 204 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
205 | return NULL; |
206 | else | |
207 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
208 | } |
209 | ||
d3420b2f MK |
210 | /* Derive a reasonable stack segment by unwinding the target stack, |
211 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
212 | successful. */ | |
be4d1333 | 213 | |
cbb83bd1 | 214 | static int |
69db8bae | 215 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 216 | { |
be4d1333 MS |
217 | struct frame_info *fi, *tmp_fi; |
218 | ||
d3420b2f MK |
219 | gdb_assert (bottom); |
220 | gdb_assert (top); | |
be4d1333 | 221 | |
d3420b2f | 222 | /* Can't succeed without stack and registers. */ |
be4d1333 | 223 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 224 | return 0; |
be4d1333 | 225 | |
d3420b2f MK |
226 | /* Can't succeed without current frame. */ |
227 | fi = get_current_frame (); | |
228 | if (fi == NULL) | |
229 | return 0; | |
be4d1333 | 230 | |
d3420b2f | 231 | /* Save frame pointer of TOS frame. */ |
8d357cca | 232 | *top = get_frame_base (fi); |
d3420b2f | 233 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 234 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 235 | *top = get_frame_sp (fi); |
be4d1333 | 236 | |
d3420b2f | 237 | /* Find prev-most frame. */ |
be4d1333 MS |
238 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
239 | fi = tmp_fi; | |
240 | ||
d3420b2f | 241 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 242 | *bottom = get_frame_base (fi); |
be4d1333 | 243 | |
d3420b2f MK |
244 | /* Now canonicalize their order, so that BOTTOM is a lower address |
245 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
246 | if (*bottom > *top) |
247 | { | |
d3420b2f MK |
248 | bfd_vma tmp_vma; |
249 | ||
be4d1333 MS |
250 | tmp_vma = *top; |
251 | *top = *bottom; | |
252 | *bottom = tmp_vma; | |
253 | } | |
254 | ||
d3420b2f | 255 | return 1; |
be4d1333 MS |
256 | } |
257 | ||
0156b218 MS |
258 | /* call_target_sbrk -- |
259 | helper function for derive_heap_segment. */ | |
260 | ||
261 | static bfd_vma | |
262 | call_target_sbrk (int sbrk_arg) | |
263 | { | |
264 | struct objfile *sbrk_objf; | |
265 | struct gdbarch *gdbarch; | |
266 | bfd_vma top_of_heap; | |
267 | struct value *target_sbrk_arg; | |
268 | struct value *sbrk_fn, *ret; | |
269 | bfd_vma tmp; | |
270 | ||
271 | if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL) | |
272 | { | |
273 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
274 | if (sbrk_fn == NULL) | |
275 | return (bfd_vma) 0; | |
276 | } | |
277 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL) | |
278 | { | |
279 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
280 | if (sbrk_fn == NULL) | |
281 | return (bfd_vma) 0; | |
282 | } | |
283 | else | |
284 | return (bfd_vma) 0; | |
285 | ||
286 | gdbarch = get_objfile_arch (sbrk_objf); | |
287 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
288 | sbrk_arg); | |
289 | gdb_assert (target_sbrk_arg); | |
290 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
291 | if (ret == NULL) | |
292 | return (bfd_vma) 0; | |
293 | ||
294 | tmp = value_as_long (ret); | |
295 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
296 | return (bfd_vma) 0; | |
297 | ||
298 | top_of_heap = tmp; | |
299 | return top_of_heap; | |
300 | } | |
301 | ||
d3420b2f MK |
302 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
303 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
304 | Return non-zero if successful. */ | |
be4d1333 | 305 | |
cbb83bd1 | 306 | static int |
69db8bae | 307 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
308 | { |
309 | bfd_vma top_of_data_memory = 0; | |
310 | bfd_vma top_of_heap = 0; | |
311 | bfd_size_type sec_size; | |
be4d1333 MS |
312 | bfd_vma sec_vaddr; |
313 | asection *sec; | |
314 | ||
d3420b2f MK |
315 | gdb_assert (bottom); |
316 | gdb_assert (top); | |
be4d1333 | 317 | |
d3420b2f MK |
318 | /* This function depends on being able to call a function in the |
319 | inferior. */ | |
be4d1333 | 320 | if (!target_has_execution) |
d3420b2f MK |
321 | return 0; |
322 | ||
323 | /* The following code assumes that the link map is arranged as | |
324 | follows (low to high addresses): | |
be4d1333 | 325 | |
d3420b2f MK |
326 | --------------------------------- |
327 | | text sections | | |
328 | --------------------------------- | |
329 | | data sections (including bss) | | |
330 | --------------------------------- | |
331 | | heap | | |
332 | --------------------------------- */ | |
be4d1333 MS |
333 | |
334 | for (sec = abfd->sections; sec; sec = sec->next) | |
335 | { | |
d3420b2f MK |
336 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
337 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
338 | { |
339 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 340 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
341 | if (sec_vaddr + sec_size > top_of_data_memory) |
342 | top_of_data_memory = sec_vaddr + sec_size; | |
343 | } | |
344 | } | |
d3420b2f | 345 | |
0156b218 MS |
346 | top_of_heap = call_target_sbrk (0); |
347 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 348 | return 0; |
be4d1333 | 349 | |
d3420b2f | 350 | /* Return results. */ |
be4d1333 MS |
351 | if (top_of_heap > top_of_data_memory) |
352 | { | |
353 | *bottom = top_of_data_memory; | |
354 | *top = top_of_heap; | |
d3420b2f | 355 | return 1; |
be4d1333 | 356 | } |
d3420b2f MK |
357 | |
358 | /* No additional heap space needs to be saved. */ | |
359 | return 0; | |
be4d1333 MS |
360 | } |
361 | ||
be4d1333 MS |
362 | static void |
363 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
364 | { | |
365 | int p_flags = 0; | |
0156b218 | 366 | int p_type = 0; |
be4d1333 MS |
367 | |
368 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 369 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 370 | p_type = PT_LOAD; |
0156b218 | 371 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 372 | p_type = PT_NOTE; |
0156b218 MS |
373 | else |
374 | p_type = PT_NULL; | |
be4d1333 MS |
375 | |
376 | p_flags |= PF_R; /* Segment is readable. */ | |
377 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
378 | p_flags |= PF_W; /* Segment is writable. */ | |
379 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
380 | p_flags |= PF_X; /* Segment is executable. */ | |
381 | ||
d3420b2f | 382 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
383 | } |
384 | ||
4f69f4c2 JK |
385 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
386 | GDB is creating. */ | |
387 | ||
cbb83bd1 | 388 | static int |
4f69f4c2 JK |
389 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
390 | int write, int exec, int modified, void *data) | |
be4d1333 | 391 | { |
cbb83bd1 | 392 | bfd *obfd = data; |
be4d1333 | 393 | asection *osec; |
cbb83bd1 RM |
394 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
395 | ||
86fbe6cc EZ |
396 | /* If the memory segment has no permissions set, ignore it, otherwise |
397 | when we later try to access it for read/write, we'll get an error | |
398 | or jam the kernel. */ | |
4f69f4c2 | 399 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
400 | { |
401 | if (info_verbose) | |
402 | { | |
5af949e3 | 403 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 404 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
405 | } |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
4f69f4c2 | 410 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
411 | { |
412 | /* See if this region of memory lies inside a known file on disk. | |
413 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
414 | struct objfile *objfile; | |
415 | struct obj_section *objsec; | |
416 | ||
417 | ALL_OBJSECTIONS (objfile, objsec) | |
418 | { | |
419 | bfd *abfd = objfile->obfd; | |
420 | asection *asec = objsec->the_bfd_section; | |
421 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
422 | asec); | |
f1f6aadf PA |
423 | bfd_vma start = obj_section_addr (objsec) & -align; |
424 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 425 | |
cbb83bd1 RM |
426 | /* Match if either the entire memory region lies inside the |
427 | section (i.e. a mapping covering some pages of a large | |
428 | segment) or the entire section lies inside the memory region | |
429 | (i.e. a mapping covering multiple small sections). | |
430 | ||
431 | This BFD was synthesized from reading target memory, | |
432 | we don't want to omit that. */ | |
0c013353 JK |
433 | if (objfile->separate_debug_objfile_backlink == NULL |
434 | && ((vaddr >= start && vaddr + size <= end) | |
435 | || (start >= vaddr && end <= vaddr + size)) | |
cbb83bd1 RM |
436 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) |
437 | { | |
349126ea | 438 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 439 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
440 | } |
441 | } | |
442 | ||
4f69f4c2 | 443 | keep:; |
cbb83bd1 RM |
444 | } |
445 | ||
4f69f4c2 JK |
446 | if (write == 0) |
447 | flags |= SEC_READONLY; | |
448 | ||
cbb83bd1 RM |
449 | if (exec) |
450 | flags |= SEC_CODE; | |
451 | else | |
452 | flags |= SEC_DATA; | |
be4d1333 | 453 | |
52b57208 | 454 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 455 | if (osec == NULL) |
be4d1333 | 456 | { |
8a3fe4f8 | 457 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 458 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 459 | return 1; |
be4d1333 MS |
460 | } |
461 | ||
462 | if (info_verbose) | |
463 | { | |
5af949e3 | 464 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 465 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
466 | } |
467 | ||
468 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 469 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 470 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 471 | return 0; |
be4d1333 MS |
472 | } |
473 | ||
474 | static int | |
b8edc417 | 475 | objfile_find_memory_regions (find_memory_region_ftype func, void *obfd) |
be4d1333 | 476 | { |
d3420b2f | 477 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
478 | struct objfile *objfile; |
479 | struct obj_section *objsec; | |
480 | bfd_vma temp_bottom, temp_top; | |
481 | ||
d3420b2f | 482 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
483 | ALL_OBJSECTIONS (objfile, objsec) |
484 | { | |
485 | bfd *ibfd = objfile->obfd; | |
486 | asection *isec = objsec->the_bfd_section; | |
487 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 | 488 | |
4f69f4c2 JK |
489 | /* Separate debug info files are irrelevant for gcore. */ |
490 | if (objfile->separate_debug_objfile_backlink != NULL) | |
491 | continue; | |
492 | ||
be4d1333 MS |
493 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) |
494 | { | |
495 | int size = bfd_section_size (ibfd, isec); | |
496 | int ret; | |
497 | ||
c6913b7d | 498 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
499 | 1, /* All sections will be readable. */ |
500 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
501 | (flags & SEC_CODE) != 0, /* Executable. */ | |
4f69f4c2 | 502 | 1, /* MODIFIED is unknown, pass it as true. */ |
d3420b2f MK |
503 | obfd); |
504 | if (ret != 0) | |
be4d1333 MS |
505 | return ret; |
506 | } | |
507 | } | |
508 | ||
d3420b2f | 509 | /* Make a stack segment. */ |
be4d1333 | 510 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 511 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
512 | 1, /* Stack section will be readable. */ |
513 | 1, /* Stack section will be writable. */ | |
514 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 515 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
516 | obfd); |
517 | ||
0963b4bd | 518 | /* Make a heap segment. */ |
be4d1333 | 519 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
520 | (*func) (temp_bottom, temp_top - temp_bottom, |
521 | 1, /* Heap section will be readable. */ | |
522 | 1, /* Heap section will be writable. */ | |
523 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 524 | 1, /* Heap section will be modified. */ |
be4d1333 | 525 | obfd); |
d3420b2f | 526 | |
be4d1333 MS |
527 | return 0; |
528 | } | |
529 | ||
530 | static void | |
531 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
532 | { | |
804e0f53 DJ |
533 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
534 | file_ptr offset = 0; | |
be4d1333 MS |
535 | struct cleanup *old_chain = NULL; |
536 | void *memhunk; | |
537 | ||
cbb83bd1 RM |
538 | /* Read-only sections are marked; we don't have to copy their contents. */ |
539 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
540 | return; |
541 | ||
542 | /* Only interested in "load" sections. */ | |
20fe79c8 | 543 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 544 | return; |
be4d1333 | 545 | |
804e0f53 | 546 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 547 | memhunk = xmalloc (size); |
be4d1333 MS |
548 | old_chain = make_cleanup (xfree, memhunk); |
549 | ||
804e0f53 DJ |
550 | while (total_size > 0) |
551 | { | |
552 | if (size > total_size) | |
553 | size = total_size; | |
554 | ||
555 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
556 | memhunk, size) != 0) | |
557 | { | |
3e43a32a MS |
558 | warning (_("Memory read failed for corefile " |
559 | "section, %s bytes at %s."), | |
5af949e3 | 560 | plongest (size), |
f5656ead | 561 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
562 | break; |
563 | } | |
564 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
565 | { | |
566 | warning (_("Failed to write corefile contents (%s)."), | |
567 | bfd_errmsg (bfd_get_error ())); | |
568 | break; | |
569 | } | |
570 | ||
571 | total_size -= size; | |
572 | offset += size; | |
573 | } | |
be4d1333 | 574 | |
d3420b2f | 575 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
576 | } |
577 | ||
578 | static int | |
579 | gcore_memory_sections (bfd *obfd) | |
580 | { | |
35c2fab7 | 581 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
582 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
583 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
584 | gcore_create_callback, obfd) != 0) |
585 | { | |
586 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
587 | return 0; /* FIXME: error return/msg? */ | |
588 | } | |
be4d1333 | 589 | |
d3420b2f | 590 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
591 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
592 | ||
d3420b2f | 593 | /* Copy memory region contents. */ |
be4d1333 MS |
594 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
595 | ||
d3420b2f | 596 | return 1; |
be4d1333 MS |
597 | } |
598 | ||
2c0b251b PA |
599 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
600 | extern initialize_file_ftype _initialize_gcore; | |
601 | ||
be4d1333 MS |
602 | void |
603 | _initialize_gcore (void) | |
604 | { | |
1bedd215 | 605 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 606 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 607 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
608 | |
609 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
610 | exec_set_find_memory_regions (objfile_find_memory_regions); | |
611 | } |