Commit | Line | Data |
---|---|---|
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" | |
cbb099e8 | 36 | #include "gdb_bfd.h" |
be4d1333 | 37 | |
804e0f53 DJ |
38 | /* The largest amount of memory to read from the target at once. We |
39 | must throttle it to limit the amount of memory used by GDB during | |
40 | generate-core-file for programs with large resident data. */ | |
41 | #define MAX_COPY_BYTES (1024 * 1024) | |
42 | ||
a78c2d62 | 43 | static const char *default_gcore_target (void); |
d3420b2f MK |
44 | static enum bfd_architecture default_gcore_arch (void); |
45 | static unsigned long default_gcore_mach (void); | |
46 | static int gcore_memory_sections (bfd *); | |
47 | ||
0156b218 MS |
48 | /* create_gcore_bfd -- helper for gcore_command (exported). |
49 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 50 | |
0156b218 MS |
51 | bfd * |
52 | create_gcore_bfd (char *filename) | |
be4d1333 | 53 | { |
520b0001 | 54 | bfd *obfd = bfd_openw (filename, default_gcore_target ()); |
d8734c88 | 55 | |
520b0001 | 56 | gdb_bfd_ref (obfd); |
d3420b2f | 57 | if (!obfd) |
0156b218 | 58 | error (_("Failed to open '%s' for output."), filename); |
a4453b7e | 59 | gdb_bfd_stash_filename (obfd); |
be4d1333 MS |
60 | bfd_set_format (obfd, bfd_core); |
61 | bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
62 | return obfd; |
63 | } | |
64 | ||
65 | /* write_gcore_file -- helper for gcore_command (exported). | |
66 | Compose and write the corefile data to the core file. */ | |
67 | ||
68 | ||
69 | void | |
70 | write_gcore_file (bfd *obfd) | |
71 | { | |
72 | void *note_data = NULL; | |
73 | int note_size = 0; | |
74 | asection *note_sec = NULL; | |
be4d1333 | 75 | |
d3420b2f | 76 | /* An external target method must build the notes section. */ |
6432734d UW |
77 | /* FIXME: uweigand/2011-10-06: All architectures that support core file |
78 | generation should be converted to gdbarch_make_corefile_notes; at that | |
79 | point, the target vector method can be removed. */ | |
80 | if (!gdbarch_make_corefile_notes_p (target_gdbarch)) | |
81 | note_data = target_make_corefile_notes (obfd, ¬e_size); | |
82 | else | |
83 | note_data = gdbarch_make_corefile_notes (target_gdbarch, obfd, ¬e_size); | |
84 | ||
85 | if (note_data == NULL || note_size == 0) | |
86 | error (_("Target does not support core file generation.")); | |
be4d1333 | 87 | |
d3420b2f | 88 | /* Create the note section. */ |
6432734d UW |
89 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
90 | SEC_HAS_CONTENTS | |
91 | | SEC_READONLY | |
92 | | SEC_ALLOC); | |
93 | if (note_sec == NULL) | |
94 | error (_("Failed to create 'note' section for corefile: %s"), | |
95 | bfd_errmsg (bfd_get_error ())); | |
96 | ||
97 | bfd_set_section_vma (obfd, note_sec, 0); | |
98 | bfd_set_section_alignment (obfd, note_sec, 0); | |
99 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 100 | |
d3420b2f | 101 | /* Now create the memory/load sections. */ |
be4d1333 | 102 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 103 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 104 | |
d3420b2f | 105 | /* Write out the contents of the note section. */ |
6432734d UW |
106 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
107 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
0156b218 MS |
108 | } |
109 | ||
14d1346b DJ |
110 | static void |
111 | do_bfd_delete_cleanup (void *arg) | |
112 | { | |
113 | bfd *obfd = arg; | |
114 | const char *filename = obfd->filename; | |
115 | ||
cbb099e8 | 116 | gdb_bfd_unref (arg); |
14d1346b DJ |
117 | unlink (filename); |
118 | } | |
119 | ||
0156b218 MS |
120 | /* gcore_command -- implements the 'gcore' command. |
121 | Generate a core file from the inferior process. */ | |
122 | ||
123 | static void | |
124 | gcore_command (char *args, int from_tty) | |
125 | { | |
126 | struct cleanup *old_chain; | |
127 | char *corefilename, corefilename_buffer[40]; | |
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) | |
135 | corefilename = args; | |
136 | else | |
137 | { | |
138 | /* Default corefile name is "core.PID". */ | |
139 | sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); | |
140 | corefilename = corefilename_buffer; | |
be4d1333 MS |
141 | } |
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 DJ |
150 | /* Need a cleanup that will close and delete the file. */ |
151 | old_chain = make_cleanup (do_bfd_delete_cleanup, obfd); | |
0156b218 MS |
152 | |
153 | /* Call worker function. */ | |
154 | write_gcore_file (obfd); | |
155 | ||
d3420b2f MK |
156 | /* Succeeded. */ |
157 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
be4d1333 | 158 | |
14d1346b | 159 | discard_cleanups (old_chain); |
cbb099e8 | 160 | gdb_bfd_unref (obfd); |
be4d1333 MS |
161 | } |
162 | ||
163 | static unsigned long | |
164 | default_gcore_mach (void) | |
165 | { | |
d3420b2f | 166 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
167 | return 0; |
168 | #else | |
1143fffb | 169 | |
a78c2d62 | 170 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
171 | |
172 | if (bfdarch != NULL) | |
173 | return bfdarch->mach; | |
be4d1333 | 174 | if (exec_bfd == NULL) |
8a3fe4f8 | 175 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
176 | |
177 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 178 | #endif /* 1 */ |
be4d1333 MS |
179 | } |
180 | ||
181 | static enum bfd_architecture | |
182 | default_gcore_arch (void) | |
183 | { | |
a78c2d62 | 184 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch); |
be4d1333 MS |
185 | |
186 | if (bfdarch != NULL) | |
187 | return bfdarch->arch; | |
be4d1333 | 188 | if (exec_bfd == NULL) |
8a3fe4f8 | 189 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
190 | |
191 | return bfd_get_arch (exec_bfd); | |
192 | } | |
193 | ||
a78c2d62 | 194 | static const char * |
be4d1333 MS |
195 | default_gcore_target (void) |
196 | { | |
a78c2d62 UW |
197 | /* The gdbarch may define a target to use for core files. */ |
198 | if (gdbarch_gcore_bfd_target_p (target_gdbarch)) | |
199 | return gdbarch_gcore_bfd_target (target_gdbarch); | |
200 | ||
201 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
202 | not work for non-ELF targets. */ | |
be4d1333 | 203 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
204 | return NULL; |
205 | else | |
206 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
207 | } |
208 | ||
d3420b2f MK |
209 | /* Derive a reasonable stack segment by unwinding the target stack, |
210 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
211 | successful. */ | |
be4d1333 | 212 | |
cbb83bd1 | 213 | static int |
69db8bae | 214 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 215 | { |
be4d1333 MS |
216 | struct frame_info *fi, *tmp_fi; |
217 | ||
d3420b2f MK |
218 | gdb_assert (bottom); |
219 | gdb_assert (top); | |
be4d1333 | 220 | |
d3420b2f | 221 | /* Can't succeed without stack and registers. */ |
be4d1333 | 222 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 223 | return 0; |
be4d1333 | 224 | |
d3420b2f MK |
225 | /* Can't succeed without current frame. */ |
226 | fi = get_current_frame (); | |
227 | if (fi == NULL) | |
228 | return 0; | |
be4d1333 | 229 | |
d3420b2f | 230 | /* Save frame pointer of TOS frame. */ |
8d357cca | 231 | *top = get_frame_base (fi); |
d3420b2f | 232 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 233 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 234 | *top = get_frame_sp (fi); |
be4d1333 | 235 | |
d3420b2f | 236 | /* Find prev-most frame. */ |
be4d1333 MS |
237 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
238 | fi = tmp_fi; | |
239 | ||
d3420b2f | 240 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 241 | *bottom = get_frame_base (fi); |
be4d1333 | 242 | |
d3420b2f MK |
243 | /* Now canonicalize their order, so that BOTTOM is a lower address |
244 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
245 | if (*bottom > *top) |
246 | { | |
d3420b2f MK |
247 | bfd_vma tmp_vma; |
248 | ||
be4d1333 MS |
249 | tmp_vma = *top; |
250 | *top = *bottom; | |
251 | *bottom = tmp_vma; | |
252 | } | |
253 | ||
d3420b2f | 254 | return 1; |
be4d1333 MS |
255 | } |
256 | ||
0156b218 MS |
257 | /* call_target_sbrk -- |
258 | helper function for derive_heap_segment. */ | |
259 | ||
260 | static bfd_vma | |
261 | call_target_sbrk (int sbrk_arg) | |
262 | { | |
263 | struct objfile *sbrk_objf; | |
264 | struct gdbarch *gdbarch; | |
265 | bfd_vma top_of_heap; | |
266 | struct value *target_sbrk_arg; | |
267 | struct value *sbrk_fn, *ret; | |
268 | bfd_vma tmp; | |
269 | ||
270 | if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL) | |
271 | { | |
272 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
273 | if (sbrk_fn == NULL) | |
274 | return (bfd_vma) 0; | |
275 | } | |
276 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL) | |
277 | { | |
278 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
279 | if (sbrk_fn == NULL) | |
280 | return (bfd_vma) 0; | |
281 | } | |
282 | else | |
283 | return (bfd_vma) 0; | |
284 | ||
285 | gdbarch = get_objfile_arch (sbrk_objf); | |
286 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
287 | sbrk_arg); | |
288 | gdb_assert (target_sbrk_arg); | |
289 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
290 | if (ret == NULL) | |
291 | return (bfd_vma) 0; | |
292 | ||
293 | tmp = value_as_long (ret); | |
294 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
295 | return (bfd_vma) 0; | |
296 | ||
297 | top_of_heap = tmp; | |
298 | return top_of_heap; | |
299 | } | |
300 | ||
d3420b2f MK |
301 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
302 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
303 | Return non-zero if successful. */ | |
be4d1333 | 304 | |
cbb83bd1 | 305 | static int |
69db8bae | 306 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
307 | { |
308 | bfd_vma top_of_data_memory = 0; | |
309 | bfd_vma top_of_heap = 0; | |
310 | bfd_size_type sec_size; | |
be4d1333 MS |
311 | bfd_vma sec_vaddr; |
312 | asection *sec; | |
313 | ||
d3420b2f MK |
314 | gdb_assert (bottom); |
315 | gdb_assert (top); | |
be4d1333 | 316 | |
d3420b2f MK |
317 | /* This function depends on being able to call a function in the |
318 | inferior. */ | |
be4d1333 | 319 | if (!target_has_execution) |
d3420b2f MK |
320 | return 0; |
321 | ||
322 | /* The following code assumes that the link map is arranged as | |
323 | follows (low to high addresses): | |
be4d1333 | 324 | |
d3420b2f MK |
325 | --------------------------------- |
326 | | text sections | | |
327 | --------------------------------- | |
328 | | data sections (including bss) | | |
329 | --------------------------------- | |
330 | | heap | | |
331 | --------------------------------- */ | |
be4d1333 MS |
332 | |
333 | for (sec = abfd->sections; sec; sec = sec->next) | |
334 | { | |
d3420b2f MK |
335 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
336 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
337 | { |
338 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 339 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
340 | if (sec_vaddr + sec_size > top_of_data_memory) |
341 | top_of_data_memory = sec_vaddr + sec_size; | |
342 | } | |
343 | } | |
d3420b2f | 344 | |
0156b218 MS |
345 | top_of_heap = call_target_sbrk (0); |
346 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 347 | return 0; |
be4d1333 | 348 | |
d3420b2f | 349 | /* Return results. */ |
be4d1333 MS |
350 | if (top_of_heap > top_of_data_memory) |
351 | { | |
352 | *bottom = top_of_data_memory; | |
353 | *top = top_of_heap; | |
d3420b2f | 354 | return 1; |
be4d1333 | 355 | } |
d3420b2f MK |
356 | |
357 | /* No additional heap space needs to be saved. */ | |
358 | return 0; | |
be4d1333 MS |
359 | } |
360 | ||
be4d1333 MS |
361 | static void |
362 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
363 | { | |
364 | int p_flags = 0; | |
0156b218 | 365 | int p_type = 0; |
be4d1333 MS |
366 | |
367 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 368 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 369 | p_type = PT_LOAD; |
0156b218 | 370 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 371 | p_type = PT_NOTE; |
0156b218 MS |
372 | else |
373 | p_type = PT_NULL; | |
be4d1333 MS |
374 | |
375 | p_flags |= PF_R; /* Segment is readable. */ | |
376 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
377 | p_flags |= PF_W; /* Segment is writable. */ | |
378 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
379 | p_flags |= PF_X; /* Segment is executable. */ | |
380 | ||
d3420b2f | 381 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
382 | } |
383 | ||
cbb83bd1 RM |
384 | static int |
385 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, | |
386 | int read, int write, int exec, void *data) | |
be4d1333 | 387 | { |
cbb83bd1 | 388 | bfd *obfd = data; |
be4d1333 | 389 | asection *osec; |
cbb83bd1 RM |
390 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
391 | ||
86fbe6cc EZ |
392 | /* If the memory segment has no permissions set, ignore it, otherwise |
393 | when we later try to access it for read/write, we'll get an error | |
394 | or jam the kernel. */ | |
395 | if (read == 0 && write == 0 && exec == 0) | |
396 | { | |
397 | if (info_verbose) | |
398 | { | |
5af949e3 UW |
399 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
400 | plongest (size), paddress (target_gdbarch, vaddr)); | |
86fbe6cc EZ |
401 | } |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
de18c1d8 | 406 | if (write == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
407 | { |
408 | /* See if this region of memory lies inside a known file on disk. | |
409 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
410 | struct objfile *objfile; | |
411 | struct obj_section *objsec; | |
412 | ||
413 | ALL_OBJSECTIONS (objfile, objsec) | |
414 | { | |
415 | bfd *abfd = objfile->obfd; | |
416 | asection *asec = objsec->the_bfd_section; | |
417 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
418 | asec); | |
f1f6aadf PA |
419 | bfd_vma start = obj_section_addr (objsec) & -align; |
420 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 421 | |
cbb83bd1 RM |
422 | /* Match if either the entire memory region lies inside the |
423 | section (i.e. a mapping covering some pages of a large | |
424 | segment) or the entire section lies inside the memory region | |
425 | (i.e. a mapping covering multiple small sections). | |
426 | ||
427 | This BFD was synthesized from reading target memory, | |
428 | we don't want to omit that. */ | |
429 | if (((vaddr >= start && vaddr + size <= end) | |
430 | || (start >= vaddr && end <= vaddr + size)) | |
431 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
432 | { | |
349126ea | 433 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 434 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
435 | } |
436 | } | |
437 | ||
438 | keep: | |
439 | flags |= SEC_READONLY; | |
440 | } | |
441 | ||
442 | if (exec) | |
443 | flags |= SEC_CODE; | |
444 | else | |
445 | flags |= SEC_DATA; | |
be4d1333 | 446 | |
52b57208 | 447 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 448 | if (osec == NULL) |
be4d1333 | 449 | { |
8a3fe4f8 | 450 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 451 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 452 | return 1; |
be4d1333 MS |
453 | } |
454 | ||
455 | if (info_verbose) | |
456 | { | |
5af949e3 UW |
457 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
458 | plongest (size), paddress (target_gdbarch, vaddr)); | |
be4d1333 MS |
459 | } |
460 | ||
461 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 462 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 463 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 464 | return 0; |
be4d1333 MS |
465 | } |
466 | ||
467 | static int | |
b8edc417 | 468 | objfile_find_memory_regions (find_memory_region_ftype func, void *obfd) |
be4d1333 | 469 | { |
d3420b2f | 470 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
471 | struct objfile *objfile; |
472 | struct obj_section *objsec; | |
473 | bfd_vma temp_bottom, temp_top; | |
474 | ||
d3420b2f | 475 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
476 | ALL_OBJSECTIONS (objfile, objsec) |
477 | { | |
478 | bfd *ibfd = objfile->obfd; | |
479 | asection *isec = objsec->the_bfd_section; | |
480 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 MS |
481 | |
482 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
483 | { | |
484 | int size = bfd_section_size (ibfd, isec); | |
485 | int ret; | |
486 | ||
c6913b7d | 487 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
488 | 1, /* All sections will be readable. */ |
489 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
490 | (flags & SEC_CODE) != 0, /* Executable. */ | |
491 | obfd); | |
492 | if (ret != 0) | |
be4d1333 MS |
493 | return ret; |
494 | } | |
495 | } | |
496 | ||
d3420b2f | 497 | /* Make a stack segment. */ |
be4d1333 | 498 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 499 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
500 | 1, /* Stack section will be readable. */ |
501 | 1, /* Stack section will be writable. */ | |
502 | 0, /* Stack section will not be executable. */ | |
be4d1333 MS |
503 | obfd); |
504 | ||
0963b4bd | 505 | /* Make a heap segment. */ |
be4d1333 | 506 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
507 | (*func) (temp_bottom, temp_top - temp_bottom, |
508 | 1, /* Heap section will be readable. */ | |
509 | 1, /* Heap section will be writable. */ | |
510 | 0, /* Heap section will not be executable. */ | |
be4d1333 | 511 | obfd); |
d3420b2f | 512 | |
be4d1333 MS |
513 | return 0; |
514 | } | |
515 | ||
516 | static void | |
517 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
518 | { | |
804e0f53 DJ |
519 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
520 | file_ptr offset = 0; | |
be4d1333 MS |
521 | struct cleanup *old_chain = NULL; |
522 | void *memhunk; | |
523 | ||
cbb83bd1 RM |
524 | /* Read-only sections are marked; we don't have to copy their contents. */ |
525 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
526 | return; |
527 | ||
528 | /* Only interested in "load" sections. */ | |
20fe79c8 | 529 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 530 | return; |
be4d1333 | 531 | |
804e0f53 | 532 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 533 | memhunk = xmalloc (size); |
be4d1333 MS |
534 | old_chain = make_cleanup (xfree, memhunk); |
535 | ||
804e0f53 DJ |
536 | while (total_size > 0) |
537 | { | |
538 | if (size > total_size) | |
539 | size = total_size; | |
540 | ||
541 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
542 | memhunk, size) != 0) | |
543 | { | |
3e43a32a MS |
544 | warning (_("Memory read failed for corefile " |
545 | "section, %s bytes at %s."), | |
5af949e3 UW |
546 | plongest (size), |
547 | paddress (target_gdbarch, bfd_section_vma (obfd, osec))); | |
804e0f53 DJ |
548 | break; |
549 | } | |
550 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
551 | { | |
552 | warning (_("Failed to write corefile contents (%s)."), | |
553 | bfd_errmsg (bfd_get_error ())); | |
554 | break; | |
555 | } | |
556 | ||
557 | total_size -= size; | |
558 | offset += size; | |
559 | } | |
be4d1333 | 560 | |
d3420b2f | 561 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
562 | } |
563 | ||
564 | static int | |
565 | gcore_memory_sections (bfd *obfd) | |
566 | { | |
35c2fab7 UW |
567 | /* Try gdbarch method first, then fall back to target method. */ |
568 | if (!gdbarch_find_memory_regions_p (target_gdbarch) | |
569 | || gdbarch_find_memory_regions (target_gdbarch, | |
570 | gcore_create_callback, obfd) != 0) | |
571 | { | |
572 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
573 | return 0; /* FIXME: error return/msg? */ | |
574 | } | |
be4d1333 | 575 | |
d3420b2f | 576 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
577 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
578 | ||
d3420b2f | 579 | /* Copy memory region contents. */ |
be4d1333 MS |
580 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
581 | ||
d3420b2f | 582 | return 1; |
be4d1333 MS |
583 | } |
584 | ||
2c0b251b PA |
585 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
586 | extern initialize_file_ftype _initialize_gcore; | |
587 | ||
be4d1333 MS |
588 | void |
589 | _initialize_gcore (void) | |
590 | { | |
1bedd215 | 591 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 592 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 593 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
594 | |
595 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
596 | exec_set_find_memory_regions (objfile_find_memory_regions); | |
597 | } |