Commit | Line | Data |
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be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
0b302171 | 3 | Copyright (C) 2001-2012 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" | |
be4d1333 | 36 | |
804e0f53 DJ |
37 | /* The largest amount of memory to read from the target at once. We |
38 | must throttle it to limit the amount of memory used by GDB during | |
39 | generate-core-file for programs with large resident data. */ | |
40 | #define MAX_COPY_BYTES (1024 * 1024) | |
41 | ||
a78c2d62 | 42 | static const char *default_gcore_target (void); |
d3420b2f MK |
43 | static enum bfd_architecture default_gcore_arch (void); |
44 | static unsigned long default_gcore_mach (void); | |
45 | static int gcore_memory_sections (bfd *); | |
46 | ||
0156b218 MS |
47 | /* create_gcore_bfd -- helper for gcore_command (exported). |
48 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 49 | |
0156b218 MS |
50 | bfd * |
51 | create_gcore_bfd (char *filename) | |
be4d1333 | 52 | { |
0156b218 | 53 | bfd *obfd = bfd_openw (filename, default_gcore_target ()); |
d8734c88 | 54 | |
d3420b2f | 55 | if (!obfd) |
0156b218 | 56 | error (_("Failed to open '%s' for output."), filename); |
be4d1333 MS |
57 | bfd_set_format (obfd, bfd_core); |
58 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
59 | return obfd; |
60 | } | |
61 | ||
62 | /* write_gcore_file -- helper for gcore_command (exported). | |
63 | Compose and write the corefile data to the core file. */ | |
64 | ||
65 | ||
66 | void | |
67 | write_gcore_file (bfd *obfd) | |
68 | { | |
69 | void *note_data = NULL; | |
70 | int note_size = 0; | |
71 | asection *note_sec = NULL; | |
be4d1333 | 72 | |
d3420b2f MK |
73 | /* An external target method must build the notes section. */ |
74 | note_data = target_make_corefile_notes (obfd, ¬e_size); | |
be4d1333 | 75 | |
d3420b2f | 76 | /* Create the note section. */ |
be4d1333 MS |
77 | if (note_data != NULL && note_size != 0) |
78 | { | |
52b57208 L |
79 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
80 | SEC_HAS_CONTENTS | |
81 | | SEC_READONLY | |
82 | | SEC_ALLOC); | |
d3420b2f | 83 | if (note_sec == NULL) |
8a3fe4f8 | 84 | error (_("Failed to create 'note' section for corefile: %s"), |
be4d1333 MS |
85 | bfd_errmsg (bfd_get_error ())); |
86 | ||
87 | bfd_set_section_vma (obfd, note_sec, 0); | |
be4d1333 MS |
88 | bfd_set_section_alignment (obfd, note_sec, 0); |
89 | bfd_set_section_size (obfd, note_sec, note_size); | |
90 | } | |
91 | ||
d3420b2f | 92 | /* Now create the memory/load sections. */ |
be4d1333 | 93 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 94 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 95 | |
d3420b2f | 96 | /* Write out the contents of the note section. */ |
be4d1333 MS |
97 | if (note_data != NULL && note_size != 0) |
98 | { | |
99 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) | |
0156b218 MS |
100 | warning (_("writing note section (%s)"), |
101 | bfd_errmsg (bfd_get_error ())); | |
102 | } | |
103 | } | |
104 | ||
14d1346b DJ |
105 | static void |
106 | do_bfd_delete_cleanup (void *arg) | |
107 | { | |
108 | bfd *obfd = arg; | |
109 | const char *filename = obfd->filename; | |
110 | ||
111 | bfd_close (arg); | |
112 | unlink (filename); | |
113 | } | |
114 | ||
0156b218 MS |
115 | /* gcore_command -- implements the 'gcore' command. |
116 | Generate a core file from the inferior process. */ | |
117 | ||
118 | static void | |
119 | gcore_command (char *args, int from_tty) | |
120 | { | |
121 | struct cleanup *old_chain; | |
122 | char *corefilename, corefilename_buffer[40]; | |
123 | bfd *obfd; | |
124 | ||
125 | /* No use generating a corefile without a target process. */ | |
126 | if (!target_has_execution) | |
127 | noprocess (); | |
128 | ||
129 | if (args && *args) | |
130 | corefilename = args; | |
131 | else | |
132 | { | |
133 | /* Default corefile name is "core.PID". */ | |
134 | sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); | |
135 | corefilename = corefilename_buffer; | |
be4d1333 MS |
136 | } |
137 | ||
0156b218 MS |
138 | if (info_verbose) |
139 | fprintf_filtered (gdb_stdout, | |
140 | "Opening corefile '%s' for output.\n", corefilename); | |
141 | ||
142 | /* Open the output file. */ | |
143 | obfd = create_gcore_bfd (corefilename); | |
144 | ||
14d1346b DJ |
145 | /* Need a cleanup that will close and delete the file. */ |
146 | old_chain = make_cleanup (do_bfd_delete_cleanup, obfd); | |
0156b218 MS |
147 | |
148 | /* Call worker function. */ | |
149 | write_gcore_file (obfd); | |
150 | ||
d3420b2f MK |
151 | /* Succeeded. */ |
152 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
be4d1333 | 153 | |
14d1346b DJ |
154 | discard_cleanups (old_chain); |
155 | bfd_close (obfd); | |
be4d1333 MS |
156 | } |
157 | ||
158 | static unsigned long | |
159 | default_gcore_mach (void) | |
160 | { | |
d3420b2f | 161 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
162 | return 0; |
163 | #else | |
1143fffb | 164 | |
a78c2d62 | 165 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
166 | |
167 | if (bfdarch != NULL) | |
168 | return bfdarch->mach; | |
be4d1333 | 169 | if (exec_bfd == NULL) |
8a3fe4f8 | 170 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
171 | |
172 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 173 | #endif /* 1 */ |
be4d1333 MS |
174 | } |
175 | ||
176 | static enum bfd_architecture | |
177 | default_gcore_arch (void) | |
178 | { | |
a78c2d62 | 179 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
180 | |
181 | if (bfdarch != NULL) | |
182 | return bfdarch->arch; | |
be4d1333 | 183 | if (exec_bfd == NULL) |
8a3fe4f8 | 184 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
185 | |
186 | return bfd_get_arch (exec_bfd); | |
187 | } | |
188 | ||
a78c2d62 | 189 | static const char * |
be4d1333 MS |
190 | default_gcore_target (void) |
191 | { | |
a78c2d62 UW |
192 | /* The gdbarch may define a target to use for core files. */ |
193 | if (gdbarch_gcore_bfd_target_p (target_gdbarch)) | |
194 | return gdbarch_gcore_bfd_target (target_gdbarch); | |
195 | ||
196 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
197 | not work for non-ELF targets. */ | |
be4d1333 | 198 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
199 | return NULL; |
200 | else | |
201 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
202 | } |
203 | ||
d3420b2f MK |
204 | /* Derive a reasonable stack segment by unwinding the target stack, |
205 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
206 | successful. */ | |
be4d1333 | 207 | |
cbb83bd1 | 208 | static int |
69db8bae | 209 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 210 | { |
be4d1333 MS |
211 | struct frame_info *fi, *tmp_fi; |
212 | ||
d3420b2f MK |
213 | gdb_assert (bottom); |
214 | gdb_assert (top); | |
be4d1333 | 215 | |
d3420b2f | 216 | /* Can't succeed without stack and registers. */ |
be4d1333 | 217 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 218 | return 0; |
be4d1333 | 219 | |
d3420b2f MK |
220 | /* Can't succeed without current frame. */ |
221 | fi = get_current_frame (); | |
222 | if (fi == NULL) | |
223 | return 0; | |
be4d1333 | 224 | |
d3420b2f | 225 | /* Save frame pointer of TOS frame. */ |
8d357cca | 226 | *top = get_frame_base (fi); |
d3420b2f | 227 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 228 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 229 | *top = get_frame_sp (fi); |
be4d1333 | 230 | |
d3420b2f | 231 | /* Find prev-most frame. */ |
be4d1333 MS |
232 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
233 | fi = tmp_fi; | |
234 | ||
d3420b2f | 235 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 236 | *bottom = get_frame_base (fi); |
be4d1333 | 237 | |
d3420b2f MK |
238 | /* Now canonicalize their order, so that BOTTOM is a lower address |
239 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
240 | if (*bottom > *top) |
241 | { | |
d3420b2f MK |
242 | bfd_vma tmp_vma; |
243 | ||
be4d1333 MS |
244 | tmp_vma = *top; |
245 | *top = *bottom; | |
246 | *bottom = tmp_vma; | |
247 | } | |
248 | ||
d3420b2f | 249 | return 1; |
be4d1333 MS |
250 | } |
251 | ||
0156b218 MS |
252 | /* call_target_sbrk -- |
253 | helper function for derive_heap_segment. */ | |
254 | ||
255 | static bfd_vma | |
256 | call_target_sbrk (int sbrk_arg) | |
257 | { | |
258 | struct objfile *sbrk_objf; | |
259 | struct gdbarch *gdbarch; | |
260 | bfd_vma top_of_heap; | |
261 | struct value *target_sbrk_arg; | |
262 | struct value *sbrk_fn, *ret; | |
263 | bfd_vma tmp; | |
264 | ||
265 | if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL) | |
266 | { | |
267 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
268 | if (sbrk_fn == NULL) | |
269 | return (bfd_vma) 0; | |
270 | } | |
271 | else 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 | |
278 | return (bfd_vma) 0; | |
279 | ||
280 | gdbarch = get_objfile_arch (sbrk_objf); | |
281 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
282 | sbrk_arg); | |
283 | gdb_assert (target_sbrk_arg); | |
284 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
285 | if (ret == NULL) | |
286 | return (bfd_vma) 0; | |
287 | ||
288 | tmp = value_as_long (ret); | |
289 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
290 | return (bfd_vma) 0; | |
291 | ||
292 | top_of_heap = tmp; | |
293 | return top_of_heap; | |
294 | } | |
295 | ||
d3420b2f MK |
296 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
297 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
298 | Return non-zero if successful. */ | |
be4d1333 | 299 | |
cbb83bd1 | 300 | static int |
69db8bae | 301 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
302 | { |
303 | bfd_vma top_of_data_memory = 0; | |
304 | bfd_vma top_of_heap = 0; | |
305 | bfd_size_type sec_size; | |
be4d1333 MS |
306 | bfd_vma sec_vaddr; |
307 | asection *sec; | |
308 | ||
d3420b2f MK |
309 | gdb_assert (bottom); |
310 | gdb_assert (top); | |
be4d1333 | 311 | |
d3420b2f MK |
312 | /* This function depends on being able to call a function in the |
313 | inferior. */ | |
be4d1333 | 314 | if (!target_has_execution) |
d3420b2f MK |
315 | return 0; |
316 | ||
317 | /* The following code assumes that the link map is arranged as | |
318 | follows (low to high addresses): | |
be4d1333 | 319 | |
d3420b2f MK |
320 | --------------------------------- |
321 | | text sections | | |
322 | --------------------------------- | |
323 | | data sections (including bss) | | |
324 | --------------------------------- | |
325 | | heap | | |
326 | --------------------------------- */ | |
be4d1333 MS |
327 | |
328 | for (sec = abfd->sections; sec; sec = sec->next) | |
329 | { | |
d3420b2f MK |
330 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
331 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
332 | { |
333 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 334 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
335 | if (sec_vaddr + sec_size > top_of_data_memory) |
336 | top_of_data_memory = sec_vaddr + sec_size; | |
337 | } | |
338 | } | |
d3420b2f | 339 | |
0156b218 MS |
340 | top_of_heap = call_target_sbrk (0); |
341 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 342 | return 0; |
be4d1333 | 343 | |
d3420b2f | 344 | /* Return results. */ |
be4d1333 MS |
345 | if (top_of_heap > top_of_data_memory) |
346 | { | |
347 | *bottom = top_of_data_memory; | |
348 | *top = top_of_heap; | |
d3420b2f | 349 | return 1; |
be4d1333 | 350 | } |
d3420b2f MK |
351 | |
352 | /* No additional heap space needs to be saved. */ | |
353 | return 0; | |
be4d1333 MS |
354 | } |
355 | ||
be4d1333 MS |
356 | static void |
357 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
358 | { | |
359 | int p_flags = 0; | |
0156b218 | 360 | int p_type = 0; |
be4d1333 MS |
361 | |
362 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 363 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 364 | p_type = PT_LOAD; |
0156b218 | 365 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 366 | p_type = PT_NOTE; |
0156b218 MS |
367 | else |
368 | p_type = PT_NULL; | |
be4d1333 MS |
369 | |
370 | p_flags |= PF_R; /* Segment is readable. */ | |
371 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
372 | p_flags |= PF_W; /* Segment is writable. */ | |
373 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
374 | p_flags |= PF_X; /* Segment is executable. */ | |
375 | ||
d3420b2f | 376 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
377 | } |
378 | ||
cbb83bd1 RM |
379 | static int |
380 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, | |
381 | int read, int write, int exec, void *data) | |
be4d1333 | 382 | { |
cbb83bd1 | 383 | bfd *obfd = data; |
be4d1333 | 384 | asection *osec; |
cbb83bd1 RM |
385 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
386 | ||
86fbe6cc EZ |
387 | /* If the memory segment has no permissions set, ignore it, otherwise |
388 | when we later try to access it for read/write, we'll get an error | |
389 | or jam the kernel. */ | |
390 | if (read == 0 && write == 0 && exec == 0) | |
391 | { | |
392 | if (info_verbose) | |
393 | { | |
5af949e3 UW |
394 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
395 | plongest (size), paddress (target_gdbarch, vaddr)); | |
86fbe6cc EZ |
396 | } |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
de18c1d8 | 401 | if (write == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
402 | { |
403 | /* See if this region of memory lies inside a known file on disk. | |
404 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
405 | struct objfile *objfile; | |
406 | struct obj_section *objsec; | |
407 | ||
408 | ALL_OBJSECTIONS (objfile, objsec) | |
409 | { | |
410 | bfd *abfd = objfile->obfd; | |
411 | asection *asec = objsec->the_bfd_section; | |
412 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
413 | asec); | |
f1f6aadf PA |
414 | bfd_vma start = obj_section_addr (objsec) & -align; |
415 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 416 | |
cbb83bd1 RM |
417 | /* Match if either the entire memory region lies inside the |
418 | section (i.e. a mapping covering some pages of a large | |
419 | segment) or the entire section lies inside the memory region | |
420 | (i.e. a mapping covering multiple small sections). | |
421 | ||
422 | This BFD was synthesized from reading target memory, | |
423 | we don't want to omit that. */ | |
424 | if (((vaddr >= start && vaddr + size <= end) | |
425 | || (start >= vaddr && end <= vaddr + size)) | |
426 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
427 | { | |
349126ea | 428 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 429 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
430 | } |
431 | } | |
432 | ||
433 | keep: | |
434 | flags |= SEC_READONLY; | |
435 | } | |
436 | ||
437 | if (exec) | |
438 | flags |= SEC_CODE; | |
439 | else | |
440 | flags |= SEC_DATA; | |
be4d1333 | 441 | |
52b57208 | 442 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 443 | if (osec == NULL) |
be4d1333 | 444 | { |
8a3fe4f8 | 445 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 446 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 447 | return 1; |
be4d1333 MS |
448 | } |
449 | ||
450 | if (info_verbose) | |
451 | { | |
5af949e3 UW |
452 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
453 | plongest (size), paddress (target_gdbarch, vaddr)); | |
be4d1333 MS |
454 | } |
455 | ||
456 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 457 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 458 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 459 | return 0; |
be4d1333 MS |
460 | } |
461 | ||
462 | static int | |
b8edc417 | 463 | objfile_find_memory_regions (find_memory_region_ftype func, void *obfd) |
be4d1333 | 464 | { |
d3420b2f | 465 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
466 | struct objfile *objfile; |
467 | struct obj_section *objsec; | |
468 | bfd_vma temp_bottom, temp_top; | |
469 | ||
d3420b2f | 470 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
471 | ALL_OBJSECTIONS (objfile, objsec) |
472 | { | |
473 | bfd *ibfd = objfile->obfd; | |
474 | asection *isec = objsec->the_bfd_section; | |
475 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 MS |
476 | |
477 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
478 | { | |
479 | int size = bfd_section_size (ibfd, isec); | |
480 | int ret; | |
481 | ||
c6913b7d | 482 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
483 | 1, /* All sections will be readable. */ |
484 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
485 | (flags & SEC_CODE) != 0, /* Executable. */ | |
486 | obfd); | |
487 | if (ret != 0) | |
be4d1333 MS |
488 | return ret; |
489 | } | |
490 | } | |
491 | ||
d3420b2f | 492 | /* Make a stack segment. */ |
be4d1333 | 493 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 494 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
495 | 1, /* Stack section will be readable. */ |
496 | 1, /* Stack section will be writable. */ | |
497 | 0, /* Stack section will not be executable. */ | |
be4d1333 MS |
498 | obfd); |
499 | ||
0963b4bd | 500 | /* Make a heap segment. */ |
be4d1333 | 501 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
502 | (*func) (temp_bottom, temp_top - temp_bottom, |
503 | 1, /* Heap section will be readable. */ | |
504 | 1, /* Heap section will be writable. */ | |
505 | 0, /* Heap section will not be executable. */ | |
be4d1333 | 506 | obfd); |
d3420b2f | 507 | |
be4d1333 MS |
508 | return 0; |
509 | } | |
510 | ||
511 | static void | |
512 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
513 | { | |
804e0f53 DJ |
514 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
515 | file_ptr offset = 0; | |
be4d1333 MS |
516 | struct cleanup *old_chain = NULL; |
517 | void *memhunk; | |
518 | ||
cbb83bd1 RM |
519 | /* Read-only sections are marked; we don't have to copy their contents. */ |
520 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
521 | return; |
522 | ||
523 | /* Only interested in "load" sections. */ | |
20fe79c8 | 524 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 525 | return; |
be4d1333 | 526 | |
804e0f53 | 527 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 528 | memhunk = xmalloc (size); |
be4d1333 MS |
529 | old_chain = make_cleanup (xfree, memhunk); |
530 | ||
804e0f53 DJ |
531 | while (total_size > 0) |
532 | { | |
533 | if (size > total_size) | |
534 | size = total_size; | |
535 | ||
536 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
537 | memhunk, size) != 0) | |
538 | { | |
3e43a32a MS |
539 | warning (_("Memory read failed for corefile " |
540 | "section, %s bytes at %s."), | |
5af949e3 UW |
541 | plongest (size), |
542 | paddress (target_gdbarch, bfd_section_vma (obfd, osec))); | |
804e0f53 DJ |
543 | break; |
544 | } | |
545 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
546 | { | |
547 | warning (_("Failed to write corefile contents (%s)."), | |
548 | bfd_errmsg (bfd_get_error ())); | |
549 | break; | |
550 | } | |
551 | ||
552 | total_size -= size; | |
553 | offset += size; | |
554 | } | |
be4d1333 | 555 | |
d3420b2f | 556 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
557 | } |
558 | ||
559 | static int | |
560 | gcore_memory_sections (bfd *obfd) | |
561 | { | |
562 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
d3420b2f | 563 | return 0; /* FIXME: error return/msg? */ |
be4d1333 | 564 | |
d3420b2f | 565 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
566 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
567 | ||
d3420b2f | 568 | /* Copy memory region contents. */ |
be4d1333 MS |
569 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
570 | ||
d3420b2f | 571 | return 1; |
be4d1333 MS |
572 | } |
573 | ||
2c0b251b PA |
574 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
575 | extern initialize_file_ftype _initialize_gcore; | |
576 | ||
be4d1333 MS |
577 | void |
578 | _initialize_gcore (void) | |
579 | { | |
1bedd215 | 580 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 581 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 582 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
583 | |
584 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
585 | exec_set_find_memory_regions (objfile_find_memory_regions); | |
586 | } |