Commit | Line | Data |
---|---|---|
be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
ecd75fc8 | 3 | Copyright (C) 2001-2014 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 | { | |
1d1f1ccb | 71 | struct cleanup *cleanup; |
0156b218 MS |
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. */ | |
f5656ead | 80 | if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) |
6432734d UW |
81 | note_data = target_make_corefile_notes (obfd, ¬e_size); |
82 | else | |
f5656ead | 83 | note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); |
6432734d | 84 | |
1d1f1ccb MM |
85 | cleanup = make_cleanup (xfree, note_data); |
86 | ||
6432734d UW |
87 | if (note_data == NULL || note_size == 0) |
88 | error (_("Target does not support core file generation.")); | |
be4d1333 | 89 | |
d3420b2f | 90 | /* Create the note section. */ |
6432734d UW |
91 | note_sec = bfd_make_section_anyway_with_flags (obfd, "note0", |
92 | SEC_HAS_CONTENTS | |
93 | | SEC_READONLY | |
94 | | SEC_ALLOC); | |
95 | if (note_sec == NULL) | |
96 | error (_("Failed to create 'note' section for corefile: %s"), | |
97 | bfd_errmsg (bfd_get_error ())); | |
98 | ||
99 | bfd_set_section_vma (obfd, note_sec, 0); | |
100 | bfd_set_section_alignment (obfd, note_sec, 0); | |
101 | bfd_set_section_size (obfd, note_sec, note_size); | |
be4d1333 | 102 | |
d3420b2f | 103 | /* Now create the memory/load sections. */ |
be4d1333 | 104 | if (gcore_memory_sections (obfd) == 0) |
8a3fe4f8 | 105 | error (_("gcore: failed to get corefile memory sections from target.")); |
be4d1333 | 106 | |
d3420b2f | 107 | /* Write out the contents of the note section. */ |
6432734d UW |
108 | if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) |
109 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); | |
1d1f1ccb MM |
110 | |
111 | do_cleanups (cleanup); | |
0156b218 MS |
112 | } |
113 | ||
14d1346b DJ |
114 | static void |
115 | do_bfd_delete_cleanup (void *arg) | |
116 | { | |
117 | bfd *obfd = arg; | |
118 | const char *filename = obfd->filename; | |
119 | ||
cbb099e8 | 120 | gdb_bfd_unref (arg); |
14d1346b DJ |
121 | unlink (filename); |
122 | } | |
123 | ||
0156b218 MS |
124 | /* gcore_command -- implements the 'gcore' command. |
125 | Generate a core file from the inferior process. */ | |
126 | ||
127 | static void | |
128 | gcore_command (char *args, int from_tty) | |
129 | { | |
1e351ed1 PA |
130 | struct cleanup *filename_chain; |
131 | struct cleanup *bfd_chain; | |
132 | char *corefilename; | |
0156b218 MS |
133 | bfd *obfd; |
134 | ||
135 | /* No use generating a corefile without a target process. */ | |
136 | if (!target_has_execution) | |
137 | noprocess (); | |
138 | ||
139 | if (args && *args) | |
1e351ed1 | 140 | corefilename = tilde_expand (args); |
0156b218 MS |
141 | else |
142 | { | |
143 | /* Default corefile name is "core.PID". */ | |
dfd4cc63 | 144 | corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid)); |
be4d1333 | 145 | } |
1e351ed1 | 146 | filename_chain = make_cleanup (xfree, corefilename); |
be4d1333 | 147 | |
0156b218 MS |
148 | if (info_verbose) |
149 | fprintf_filtered (gdb_stdout, | |
150 | "Opening corefile '%s' for output.\n", corefilename); | |
151 | ||
152 | /* Open the output file. */ | |
153 | obfd = create_gcore_bfd (corefilename); | |
154 | ||
14d1346b | 155 | /* Need a cleanup that will close and delete the file. */ |
1e351ed1 | 156 | bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd); |
0156b218 MS |
157 | |
158 | /* Call worker function. */ | |
159 | write_gcore_file (obfd); | |
160 | ||
d3420b2f | 161 | /* Succeeded. */ |
1e351ed1 | 162 | discard_cleanups (bfd_chain); |
cbb099e8 | 163 | gdb_bfd_unref (obfd); |
1e351ed1 PA |
164 | |
165 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); | |
166 | do_cleanups (filename_chain); | |
be4d1333 MS |
167 | } |
168 | ||
169 | static unsigned long | |
170 | default_gcore_mach (void) | |
171 | { | |
d3420b2f | 172 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
173 | return 0; |
174 | #else | |
1143fffb | 175 | |
f5656ead | 176 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
177 | |
178 | if (bfdarch != NULL) | |
179 | return bfdarch->mach; | |
be4d1333 | 180 | if (exec_bfd == NULL) |
8a3fe4f8 | 181 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
182 | |
183 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 184 | #endif /* 1 */ |
be4d1333 MS |
185 | } |
186 | ||
187 | static enum bfd_architecture | |
188 | default_gcore_arch (void) | |
189 | { | |
f5656ead | 190 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
191 | |
192 | if (bfdarch != NULL) | |
193 | return bfdarch->arch; | |
be4d1333 | 194 | if (exec_bfd == NULL) |
8a3fe4f8 | 195 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
196 | |
197 | return bfd_get_arch (exec_bfd); | |
198 | } | |
199 | ||
a78c2d62 | 200 | static const char * |
be4d1333 MS |
201 | default_gcore_target (void) |
202 | { | |
a78c2d62 | 203 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
204 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
205 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
206 | |
207 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
208 | not work for non-ELF targets. */ | |
be4d1333 | 209 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
210 | return NULL; |
211 | else | |
212 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
213 | } |
214 | ||
d3420b2f MK |
215 | /* Derive a reasonable stack segment by unwinding the target stack, |
216 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
217 | successful. */ | |
be4d1333 | 218 | |
cbb83bd1 | 219 | static int |
69db8bae | 220 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 221 | { |
be4d1333 MS |
222 | struct frame_info *fi, *tmp_fi; |
223 | ||
d3420b2f MK |
224 | gdb_assert (bottom); |
225 | gdb_assert (top); | |
be4d1333 | 226 | |
d3420b2f | 227 | /* Can't succeed without stack and registers. */ |
be4d1333 | 228 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 229 | return 0; |
be4d1333 | 230 | |
d3420b2f MK |
231 | /* Can't succeed without current frame. */ |
232 | fi = get_current_frame (); | |
233 | if (fi == NULL) | |
234 | return 0; | |
be4d1333 | 235 | |
d3420b2f | 236 | /* Save frame pointer of TOS frame. */ |
8d357cca | 237 | *top = get_frame_base (fi); |
d3420b2f | 238 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 239 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 240 | *top = get_frame_sp (fi); |
be4d1333 | 241 | |
d3420b2f | 242 | /* Find prev-most frame. */ |
be4d1333 MS |
243 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
244 | fi = tmp_fi; | |
245 | ||
d3420b2f | 246 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 247 | *bottom = get_frame_base (fi); |
be4d1333 | 248 | |
d3420b2f MK |
249 | /* Now canonicalize their order, so that BOTTOM is a lower address |
250 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
251 | if (*bottom > *top) |
252 | { | |
d3420b2f MK |
253 | bfd_vma tmp_vma; |
254 | ||
be4d1333 MS |
255 | tmp_vma = *top; |
256 | *top = *bottom; | |
257 | *bottom = tmp_vma; | |
258 | } | |
259 | ||
d3420b2f | 260 | return 1; |
be4d1333 MS |
261 | } |
262 | ||
0156b218 MS |
263 | /* call_target_sbrk -- |
264 | helper function for derive_heap_segment. */ | |
265 | ||
266 | static bfd_vma | |
267 | call_target_sbrk (int sbrk_arg) | |
268 | { | |
269 | struct objfile *sbrk_objf; | |
270 | struct gdbarch *gdbarch; | |
271 | bfd_vma top_of_heap; | |
272 | struct value *target_sbrk_arg; | |
273 | struct value *sbrk_fn, *ret; | |
274 | bfd_vma tmp; | |
275 | ||
3b7344d5 | 276 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
277 | { |
278 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
279 | if (sbrk_fn == NULL) | |
280 | return (bfd_vma) 0; | |
281 | } | |
3b7344d5 | 282 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
283 | { |
284 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
285 | if (sbrk_fn == NULL) | |
286 | return (bfd_vma) 0; | |
287 | } | |
288 | else | |
289 | return (bfd_vma) 0; | |
290 | ||
291 | gdbarch = get_objfile_arch (sbrk_objf); | |
292 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
293 | sbrk_arg); | |
294 | gdb_assert (target_sbrk_arg); | |
295 | ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); | |
296 | if (ret == NULL) | |
297 | return (bfd_vma) 0; | |
298 | ||
299 | tmp = value_as_long (ret); | |
300 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
301 | return (bfd_vma) 0; | |
302 | ||
303 | top_of_heap = tmp; | |
304 | return top_of_heap; | |
305 | } | |
306 | ||
d3420b2f MK |
307 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
308 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
309 | Return non-zero if successful. */ | |
be4d1333 | 310 | |
cbb83bd1 | 311 | static int |
69db8bae | 312 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
313 | { |
314 | bfd_vma top_of_data_memory = 0; | |
315 | bfd_vma top_of_heap = 0; | |
316 | bfd_size_type sec_size; | |
be4d1333 MS |
317 | bfd_vma sec_vaddr; |
318 | asection *sec; | |
319 | ||
d3420b2f MK |
320 | gdb_assert (bottom); |
321 | gdb_assert (top); | |
be4d1333 | 322 | |
d3420b2f MK |
323 | /* This function depends on being able to call a function in the |
324 | inferior. */ | |
be4d1333 | 325 | if (!target_has_execution) |
d3420b2f MK |
326 | return 0; |
327 | ||
328 | /* The following code assumes that the link map is arranged as | |
329 | follows (low to high addresses): | |
be4d1333 | 330 | |
d3420b2f MK |
331 | --------------------------------- |
332 | | text sections | | |
333 | --------------------------------- | |
334 | | data sections (including bss) | | |
335 | --------------------------------- | |
336 | | heap | | |
337 | --------------------------------- */ | |
be4d1333 MS |
338 | |
339 | for (sec = abfd->sections; sec; sec = sec->next) | |
340 | { | |
d3420b2f MK |
341 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
342 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
343 | { |
344 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 345 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
346 | if (sec_vaddr + sec_size > top_of_data_memory) |
347 | top_of_data_memory = sec_vaddr + sec_size; | |
348 | } | |
349 | } | |
d3420b2f | 350 | |
0156b218 MS |
351 | top_of_heap = call_target_sbrk (0); |
352 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 353 | return 0; |
be4d1333 | 354 | |
d3420b2f | 355 | /* Return results. */ |
be4d1333 MS |
356 | if (top_of_heap > top_of_data_memory) |
357 | { | |
358 | *bottom = top_of_data_memory; | |
359 | *top = top_of_heap; | |
d3420b2f | 360 | return 1; |
be4d1333 | 361 | } |
d3420b2f MK |
362 | |
363 | /* No additional heap space needs to be saved. */ | |
364 | return 0; | |
be4d1333 MS |
365 | } |
366 | ||
be4d1333 MS |
367 | static void |
368 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
369 | { | |
370 | int p_flags = 0; | |
0156b218 | 371 | int p_type = 0; |
be4d1333 MS |
372 | |
373 | /* FIXME: these constants may only be applicable for ELF. */ | |
20fe79c8 | 374 | if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) |
be4d1333 | 375 | p_type = PT_LOAD; |
0156b218 | 376 | else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) |
be4d1333 | 377 | p_type = PT_NOTE; |
0156b218 MS |
378 | else |
379 | p_type = PT_NULL; | |
be4d1333 MS |
380 | |
381 | p_flags |= PF_R; /* Segment is readable. */ | |
382 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
383 | p_flags |= PF_W; /* Segment is writable. */ | |
384 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
385 | p_flags |= PF_X; /* Segment is executable. */ | |
386 | ||
d3420b2f | 387 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
388 | } |
389 | ||
4f69f4c2 JK |
390 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
391 | GDB is creating. */ | |
392 | ||
cbb83bd1 | 393 | static int |
4f69f4c2 JK |
394 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
395 | int write, int exec, int modified, void *data) | |
be4d1333 | 396 | { |
cbb83bd1 | 397 | bfd *obfd = data; |
be4d1333 | 398 | asection *osec; |
cbb83bd1 RM |
399 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
400 | ||
86fbe6cc EZ |
401 | /* If the memory segment has no permissions set, ignore it, otherwise |
402 | when we later try to access it for read/write, we'll get an error | |
403 | or jam the kernel. */ | |
4f69f4c2 | 404 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
405 | { |
406 | if (info_verbose) | |
407 | { | |
5af949e3 | 408 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 409 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
410 | } |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
4f69f4c2 | 415 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
416 | { |
417 | /* See if this region of memory lies inside a known file on disk. | |
418 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
419 | struct objfile *objfile; | |
420 | struct obj_section *objsec; | |
421 | ||
422 | ALL_OBJSECTIONS (objfile, objsec) | |
423 | { | |
424 | bfd *abfd = objfile->obfd; | |
425 | asection *asec = objsec->the_bfd_section; | |
426 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
427 | asec); | |
f1f6aadf PA |
428 | bfd_vma start = obj_section_addr (objsec) & -align; |
429 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
d8734c88 | 430 | |
cbb83bd1 RM |
431 | /* Match if either the entire memory region lies inside the |
432 | section (i.e. a mapping covering some pages of a large | |
433 | segment) or the entire section lies inside the memory region | |
434 | (i.e. a mapping covering multiple small sections). | |
435 | ||
436 | This BFD was synthesized from reading target memory, | |
437 | we don't want to omit that. */ | |
0c013353 JK |
438 | if (objfile->separate_debug_objfile_backlink == NULL |
439 | && ((vaddr >= start && vaddr + size <= end) | |
440 | || (start >= vaddr && end <= vaddr + size)) | |
cbb83bd1 RM |
441 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) |
442 | { | |
349126ea | 443 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); |
0963b4bd | 444 | goto keep; /* Break out of two nested for loops. */ |
cbb83bd1 RM |
445 | } |
446 | } | |
447 | ||
4f69f4c2 | 448 | keep:; |
cbb83bd1 RM |
449 | } |
450 | ||
4f69f4c2 JK |
451 | if (write == 0) |
452 | flags |= SEC_READONLY; | |
453 | ||
cbb83bd1 RM |
454 | if (exec) |
455 | flags |= SEC_CODE; | |
456 | else | |
457 | flags |= SEC_DATA; | |
be4d1333 | 458 | |
52b57208 | 459 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 460 | if (osec == NULL) |
be4d1333 | 461 | { |
8a3fe4f8 | 462 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 463 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 464 | return 1; |
be4d1333 MS |
465 | } |
466 | ||
467 | if (info_verbose) | |
468 | { | |
5af949e3 | 469 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 470 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
471 | } |
472 | ||
473 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 474 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 475 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 476 | return 0; |
be4d1333 MS |
477 | } |
478 | ||
b427c1bc TT |
479 | int |
480 | objfile_find_memory_regions (struct target_ops *self, | |
481 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 482 | { |
d3420b2f | 483 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
484 | struct objfile *objfile; |
485 | struct obj_section *objsec; | |
486 | bfd_vma temp_bottom, temp_top; | |
487 | ||
d3420b2f | 488 | /* Call callback function for each objfile section. */ |
be4d1333 MS |
489 | ALL_OBJSECTIONS (objfile, objsec) |
490 | { | |
491 | bfd *ibfd = objfile->obfd; | |
492 | asection *isec = objsec->the_bfd_section; | |
493 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
be4d1333 | 494 | |
4f69f4c2 JK |
495 | /* Separate debug info files are irrelevant for gcore. */ |
496 | if (objfile->separate_debug_objfile_backlink != NULL) | |
497 | continue; | |
498 | ||
be4d1333 MS |
499 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) |
500 | { | |
501 | int size = bfd_section_size (ibfd, isec); | |
502 | int ret; | |
503 | ||
c6913b7d | 504 | ret = (*func) (obj_section_addr (objsec), size, |
d3420b2f MK |
505 | 1, /* All sections will be readable. */ |
506 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
507 | (flags & SEC_CODE) != 0, /* Executable. */ | |
4f69f4c2 | 508 | 1, /* MODIFIED is unknown, pass it as true. */ |
d3420b2f MK |
509 | obfd); |
510 | if (ret != 0) | |
be4d1333 MS |
511 | return ret; |
512 | } | |
513 | } | |
514 | ||
d3420b2f | 515 | /* Make a stack segment. */ |
be4d1333 | 516 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 517 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
518 | 1, /* Stack section will be readable. */ |
519 | 1, /* Stack section will be writable. */ | |
520 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 521 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
522 | obfd); |
523 | ||
0963b4bd | 524 | /* Make a heap segment. */ |
be4d1333 | 525 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
526 | (*func) (temp_bottom, temp_top - temp_bottom, |
527 | 1, /* Heap section will be readable. */ | |
528 | 1, /* Heap section will be writable. */ | |
529 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 530 | 1, /* Heap section will be modified. */ |
be4d1333 | 531 | obfd); |
d3420b2f | 532 | |
be4d1333 MS |
533 | return 0; |
534 | } | |
535 | ||
536 | static void | |
537 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
538 | { | |
804e0f53 DJ |
539 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
540 | file_ptr offset = 0; | |
be4d1333 MS |
541 | struct cleanup *old_chain = NULL; |
542 | void *memhunk; | |
543 | ||
cbb83bd1 RM |
544 | /* Read-only sections are marked; we don't have to copy their contents. */ |
545 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
546 | return; |
547 | ||
548 | /* Only interested in "load" sections. */ | |
20fe79c8 | 549 | if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) |
d3420b2f | 550 | return; |
be4d1333 | 551 | |
804e0f53 | 552 | size = min (total_size, MAX_COPY_BYTES); |
d3420b2f | 553 | memhunk = xmalloc (size); |
be4d1333 MS |
554 | old_chain = make_cleanup (xfree, memhunk); |
555 | ||
804e0f53 DJ |
556 | while (total_size > 0) |
557 | { | |
558 | if (size > total_size) | |
559 | size = total_size; | |
560 | ||
561 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
562 | memhunk, size) != 0) | |
563 | { | |
3e43a32a MS |
564 | warning (_("Memory read failed for corefile " |
565 | "section, %s bytes at %s."), | |
5af949e3 | 566 | plongest (size), |
f5656ead | 567 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
568 | break; |
569 | } | |
570 | if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) | |
571 | { | |
572 | warning (_("Failed to write corefile contents (%s)."), | |
573 | bfd_errmsg (bfd_get_error ())); | |
574 | break; | |
575 | } | |
576 | ||
577 | total_size -= size; | |
578 | offset += size; | |
579 | } | |
be4d1333 | 580 | |
d3420b2f | 581 | do_cleanups (old_chain); /* Frees MEMHUNK. */ |
be4d1333 MS |
582 | } |
583 | ||
584 | static int | |
585 | gcore_memory_sections (bfd *obfd) | |
586 | { | |
35c2fab7 | 587 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
588 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
589 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
590 | gcore_create_callback, obfd) != 0) |
591 | { | |
592 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
593 | return 0; /* FIXME: error return/msg? */ | |
594 | } | |
be4d1333 | 595 | |
d3420b2f | 596 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
597 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
598 | ||
d3420b2f | 599 | /* Copy memory region contents. */ |
be4d1333 MS |
600 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
601 | ||
d3420b2f | 602 | return 1; |
be4d1333 MS |
603 | } |
604 | ||
2c0b251b PA |
605 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
606 | extern initialize_file_ftype _initialize_gcore; | |
607 | ||
be4d1333 MS |
608 | void |
609 | _initialize_gcore (void) | |
610 | { | |
1bedd215 | 611 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 612 | Save a core file with the current state of the debugged process.\n\ |
1bedd215 | 613 | Argument is optional filename. Default filename is 'core.<process_id>'.")); |
be4d1333 MS |
614 | |
615 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 616 | } |