Commit | Line | Data |
---|---|---|
be4d1333 | 1 | /* Generate a core file for the inferior process. |
1bac305b | 2 | |
42a4f53d | 3 | Copyright (C) 2001-2019 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" |
0156b218 MS |
32 | #include <fcntl.h> |
33 | #include "regcache.h" | |
34 | #include "regset.h" | |
cbb099e8 | 35 | #include "gdb_bfd.h" |
47ecca85 | 36 | #include "readline/tilde.h" |
325fac50 | 37 | #include <algorithm> |
bef155c3 | 38 | #include "common/gdb_unlinker.h" |
26fcd5d7 | 39 | #include "byte-vector.h" |
be4d1333 | 40 | |
804e0f53 DJ |
41 | /* The largest amount of memory to read from the target at once. We |
42 | must throttle it to limit the amount of memory used by GDB during | |
43 | generate-core-file for programs with large resident data. */ | |
44 | #define MAX_COPY_BYTES (1024 * 1024) | |
45 | ||
a78c2d62 | 46 | static const char *default_gcore_target (void); |
d3420b2f MK |
47 | static enum bfd_architecture default_gcore_arch (void); |
48 | static unsigned long default_gcore_mach (void); | |
49 | static int gcore_memory_sections (bfd *); | |
50 | ||
0156b218 MS |
51 | /* create_gcore_bfd -- helper for gcore_command (exported). |
52 | Open a new bfd core file for output, and return the handle. */ | |
be4d1333 | 53 | |
192b62ce | 54 | gdb_bfd_ref_ptr |
85e1311a | 55 | create_gcore_bfd (const char *filename) |
be4d1333 | 56 | { |
192b62ce | 57 | gdb_bfd_ref_ptr obfd (gdb_bfd_openw (filename, default_gcore_target ())); |
d8734c88 | 58 | |
192b62ce | 59 | if (obfd == NULL) |
0156b218 | 60 | error (_("Failed to open '%s' for output."), filename); |
192b62ce TT |
61 | bfd_set_format (obfd.get (), bfd_core); |
62 | bfd_set_arch_mach (obfd.get (), default_gcore_arch (), default_gcore_mach ()); | |
0156b218 MS |
63 | return obfd; |
64 | } | |
65 | ||
5fff78c4 | 66 | /* write_gcore_file_1 -- do the actual work of write_gcore_file. */ |
0156b218 | 67 | |
5fff78c4 MM |
68 | static void |
69 | write_gcore_file_1 (bfd *obfd) | |
0156b218 | 70 | { |
44287fd8 | 71 | gdb::unique_xmalloc_ptr<char> note_data; |
0156b218 MS |
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 ())) |
44287fd8 | 80 | note_data.reset (target_make_corefile_notes (obfd, ¬e_size)); |
6432734d | 81 | else |
44287fd8 TT |
82 | note_data.reset (gdbarch_make_corefile_notes (target_gdbarch (), obfd, |
83 | ¬e_size)); | |
1d1f1ccb | 84 | |
6432734d UW |
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. */ |
44287fd8 TT |
106 | if (!bfd_set_section_contents (obfd, note_sec, note_data.get (), 0, |
107 | note_size)) | |
6432734d | 108 | warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); |
0156b218 MS |
109 | } |
110 | ||
5fff78c4 MM |
111 | /* write_gcore_file -- helper for gcore_command (exported). |
112 | Compose and write the corefile data to the core file. */ | |
113 | ||
114 | void | |
115 | write_gcore_file (bfd *obfd) | |
116 | { | |
492d29ea | 117 | struct gdb_exception except = exception_none; |
5fff78c4 MM |
118 | |
119 | target_prepare_to_generate_core (); | |
120 | ||
492d29ea PA |
121 | TRY |
122 | { | |
123 | write_gcore_file_1 (obfd); | |
124 | } | |
125 | CATCH (e, RETURN_MASK_ALL) | |
126 | { | |
127 | except = e; | |
128 | } | |
129 | END_CATCH | |
5fff78c4 MM |
130 | |
131 | target_done_generating_core (); | |
132 | ||
133 | if (except.reason < 0) | |
134 | throw_exception (except); | |
135 | } | |
136 | ||
0156b218 MS |
137 | /* gcore_command -- implements the 'gcore' command. |
138 | Generate a core file from the inferior process. */ | |
139 | ||
140 | static void | |
0b39b52e | 141 | gcore_command (const char *args, int from_tty) |
0156b218 | 142 | { |
bef155c3 | 143 | gdb::unique_xmalloc_ptr<char> corefilename; |
0156b218 MS |
144 | |
145 | /* No use generating a corefile without a target process. */ | |
146 | if (!target_has_execution) | |
147 | noprocess (); | |
148 | ||
149 | if (args && *args) | |
bef155c3 | 150 | corefilename.reset (tilde_expand (args)); |
0156b218 MS |
151 | else |
152 | { | |
153 | /* Default corefile name is "core.PID". */ | |
e99b03dc | 154 | corefilename.reset (xstrprintf ("core.%d", inferior_ptid.pid ())); |
be4d1333 MS |
155 | } |
156 | ||
0156b218 MS |
157 | if (info_verbose) |
158 | fprintf_filtered (gdb_stdout, | |
bef155c3 TT |
159 | "Opening corefile '%s' for output.\n", |
160 | corefilename.get ()); | |
0156b218 MS |
161 | |
162 | /* Open the output file. */ | |
bef155c3 | 163 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (corefilename.get ())); |
0156b218 | 164 | |
bef155c3 TT |
165 | /* Arrange to unlink the file on failure. */ |
166 | gdb::unlinker unlink_file (corefilename.get ()); | |
0156b218 MS |
167 | |
168 | /* Call worker function. */ | |
bef155c3 | 169 | write_gcore_file (obfd.get ()); |
0156b218 | 170 | |
d3420b2f | 171 | /* Succeeded. */ |
bef155c3 | 172 | unlink_file.keep (); |
1e351ed1 | 173 | |
bef155c3 | 174 | fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename.get ()); |
be4d1333 MS |
175 | } |
176 | ||
177 | static unsigned long | |
178 | default_gcore_mach (void) | |
179 | { | |
d3420b2f | 180 | #if 1 /* See if this even matters... */ |
6dbdc4a3 MS |
181 | return 0; |
182 | #else | |
1143fffb | 183 | |
f5656ead | 184 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
185 | |
186 | if (bfdarch != NULL) | |
187 | return bfdarch->mach; | |
be4d1333 | 188 | if (exec_bfd == NULL) |
8a3fe4f8 | 189 | error (_("Can't find default bfd machine type (need execfile).")); |
be4d1333 MS |
190 | |
191 | return bfd_get_mach (exec_bfd); | |
6dbdc4a3 | 192 | #endif /* 1 */ |
be4d1333 MS |
193 | } |
194 | ||
195 | static enum bfd_architecture | |
196 | default_gcore_arch (void) | |
197 | { | |
f5656ead | 198 | const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch ()); |
be4d1333 MS |
199 | |
200 | if (bfdarch != NULL) | |
201 | return bfdarch->arch; | |
be4d1333 | 202 | if (exec_bfd == NULL) |
8a3fe4f8 | 203 | error (_("Can't find bfd architecture for corefile (need execfile).")); |
be4d1333 MS |
204 | |
205 | return bfd_get_arch (exec_bfd); | |
206 | } | |
207 | ||
a78c2d62 | 208 | static const char * |
be4d1333 MS |
209 | default_gcore_target (void) |
210 | { | |
a78c2d62 | 211 | /* The gdbarch may define a target to use for core files. */ |
f5656ead TT |
212 | if (gdbarch_gcore_bfd_target_p (target_gdbarch ())) |
213 | return gdbarch_gcore_bfd_target (target_gdbarch ()); | |
a78c2d62 UW |
214 | |
215 | /* Otherwise, try to fall back to the exec_bfd target. This will probably | |
216 | not work for non-ELF targets. */ | |
be4d1333 | 217 | if (exec_bfd == NULL) |
6dbdc4a3 MS |
218 | return NULL; |
219 | else | |
220 | return bfd_get_target (exec_bfd); | |
be4d1333 MS |
221 | } |
222 | ||
d3420b2f MK |
223 | /* Derive a reasonable stack segment by unwinding the target stack, |
224 | and store its limits in *BOTTOM and *TOP. Return non-zero if | |
225 | successful. */ | |
be4d1333 | 226 | |
cbb83bd1 | 227 | static int |
69db8bae | 228 | derive_stack_segment (bfd_vma *bottom, bfd_vma *top) |
be4d1333 | 229 | { |
be4d1333 MS |
230 | struct frame_info *fi, *tmp_fi; |
231 | ||
d3420b2f MK |
232 | gdb_assert (bottom); |
233 | gdb_assert (top); | |
be4d1333 | 234 | |
d3420b2f | 235 | /* Can't succeed without stack and registers. */ |
be4d1333 | 236 | if (!target_has_stack || !target_has_registers) |
d3420b2f | 237 | return 0; |
be4d1333 | 238 | |
d3420b2f MK |
239 | /* Can't succeed without current frame. */ |
240 | fi = get_current_frame (); | |
241 | if (fi == NULL) | |
242 | return 0; | |
be4d1333 | 243 | |
d3420b2f | 244 | /* Save frame pointer of TOS frame. */ |
8d357cca | 245 | *top = get_frame_base (fi); |
d3420b2f | 246 | /* If current stack pointer is more "inner", use that instead. */ |
40a6adc1 | 247 | if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top)) |
fb4443d8 | 248 | *top = get_frame_sp (fi); |
be4d1333 | 249 | |
d3420b2f | 250 | /* Find prev-most frame. */ |
be4d1333 MS |
251 | while ((tmp_fi = get_prev_frame (fi)) != NULL) |
252 | fi = tmp_fi; | |
253 | ||
d3420b2f | 254 | /* Save frame pointer of prev-most frame. */ |
8d357cca | 255 | *bottom = get_frame_base (fi); |
be4d1333 | 256 | |
d3420b2f MK |
257 | /* Now canonicalize their order, so that BOTTOM is a lower address |
258 | (as opposed to a lower stack frame). */ | |
be4d1333 MS |
259 | if (*bottom > *top) |
260 | { | |
d3420b2f MK |
261 | bfd_vma tmp_vma; |
262 | ||
be4d1333 MS |
263 | tmp_vma = *top; |
264 | *top = *bottom; | |
265 | *bottom = tmp_vma; | |
266 | } | |
267 | ||
d3420b2f | 268 | return 1; |
be4d1333 MS |
269 | } |
270 | ||
0156b218 MS |
271 | /* call_target_sbrk -- |
272 | helper function for derive_heap_segment. */ | |
273 | ||
274 | static bfd_vma | |
275 | call_target_sbrk (int sbrk_arg) | |
276 | { | |
277 | struct objfile *sbrk_objf; | |
278 | struct gdbarch *gdbarch; | |
279 | bfd_vma top_of_heap; | |
280 | struct value *target_sbrk_arg; | |
281 | struct value *sbrk_fn, *ret; | |
282 | bfd_vma tmp; | |
283 | ||
3b7344d5 | 284 | if (lookup_minimal_symbol ("sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
285 | { |
286 | sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf); | |
287 | if (sbrk_fn == NULL) | |
288 | return (bfd_vma) 0; | |
289 | } | |
3b7344d5 | 290 | else if (lookup_minimal_symbol ("_sbrk", NULL, NULL).minsym != NULL) |
0156b218 MS |
291 | { |
292 | sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf); | |
293 | if (sbrk_fn == NULL) | |
294 | return (bfd_vma) 0; | |
295 | } | |
296 | else | |
297 | return (bfd_vma) 0; | |
298 | ||
299 | gdbarch = get_objfile_arch (sbrk_objf); | |
300 | target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, | |
301 | sbrk_arg); | |
302 | gdb_assert (target_sbrk_arg); | |
e71585ff | 303 | ret = call_function_by_hand (sbrk_fn, NULL, target_sbrk_arg); |
0156b218 MS |
304 | if (ret == NULL) |
305 | return (bfd_vma) 0; | |
306 | ||
307 | tmp = value_as_long (ret); | |
308 | if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff) | |
309 | return (bfd_vma) 0; | |
310 | ||
311 | top_of_heap = tmp; | |
312 | return top_of_heap; | |
313 | } | |
314 | ||
d3420b2f MK |
315 | /* Derive a reasonable heap segment for ABFD by looking at sbrk and |
316 | the static data sections. Store its limits in *BOTTOM and *TOP. | |
317 | Return non-zero if successful. */ | |
be4d1333 | 318 | |
cbb83bd1 | 319 | static int |
69db8bae | 320 | derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) |
be4d1333 MS |
321 | { |
322 | bfd_vma top_of_data_memory = 0; | |
323 | bfd_vma top_of_heap = 0; | |
324 | bfd_size_type sec_size; | |
be4d1333 MS |
325 | bfd_vma sec_vaddr; |
326 | asection *sec; | |
327 | ||
d3420b2f MK |
328 | gdb_assert (bottom); |
329 | gdb_assert (top); | |
be4d1333 | 330 | |
d3420b2f MK |
331 | /* This function depends on being able to call a function in the |
332 | inferior. */ | |
be4d1333 | 333 | if (!target_has_execution) |
d3420b2f MK |
334 | return 0; |
335 | ||
336 | /* The following code assumes that the link map is arranged as | |
337 | follows (low to high addresses): | |
be4d1333 | 338 | |
d3420b2f MK |
339 | --------------------------------- |
340 | | text sections | | |
341 | --------------------------------- | |
342 | | data sections (including bss) | | |
343 | --------------------------------- | |
344 | | heap | | |
345 | --------------------------------- */ | |
be4d1333 MS |
346 | |
347 | for (sec = abfd->sections; sec; sec = sec->next) | |
348 | { | |
d3420b2f MK |
349 | if (bfd_get_section_flags (abfd, sec) & SEC_DATA |
350 | || strcmp (".bss", bfd_section_name (abfd, sec)) == 0) | |
be4d1333 MS |
351 | { |
352 | sec_vaddr = bfd_get_section_vma (abfd, sec); | |
2c500098 | 353 | sec_size = bfd_get_section_size (sec); |
be4d1333 MS |
354 | if (sec_vaddr + sec_size > top_of_data_memory) |
355 | top_of_data_memory = sec_vaddr + sec_size; | |
356 | } | |
357 | } | |
d3420b2f | 358 | |
0156b218 MS |
359 | top_of_heap = call_target_sbrk (0); |
360 | if (top_of_heap == (bfd_vma) 0) | |
be4d1333 | 361 | return 0; |
be4d1333 | 362 | |
d3420b2f | 363 | /* Return results. */ |
be4d1333 MS |
364 | if (top_of_heap > top_of_data_memory) |
365 | { | |
366 | *bottom = top_of_data_memory; | |
367 | *top = top_of_heap; | |
d3420b2f | 368 | return 1; |
be4d1333 | 369 | } |
d3420b2f MK |
370 | |
371 | /* No additional heap space needs to be saved. */ | |
372 | return 0; | |
be4d1333 MS |
373 | } |
374 | ||
be4d1333 MS |
375 | static void |
376 | make_output_phdrs (bfd *obfd, asection *osec, void *ignored) | |
377 | { | |
378 | int p_flags = 0; | |
0156b218 | 379 | int p_type = 0; |
be4d1333 MS |
380 | |
381 | /* FIXME: these constants may only be applicable for ELF. */ | |
61012eef | 382 | if (startswith (bfd_section_name (obfd, osec), "load")) |
be4d1333 | 383 | p_type = PT_LOAD; |
61012eef | 384 | else if (startswith (bfd_section_name (obfd, osec), "note")) |
be4d1333 | 385 | p_type = PT_NOTE; |
0156b218 MS |
386 | else |
387 | p_type = PT_NULL; | |
be4d1333 MS |
388 | |
389 | p_flags |= PF_R; /* Segment is readable. */ | |
390 | if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) | |
391 | p_flags |= PF_W; /* Segment is writable. */ | |
392 | if (bfd_get_section_flags (obfd, osec) & SEC_CODE) | |
393 | p_flags |= PF_X; /* Segment is executable. */ | |
394 | ||
d3420b2f | 395 | bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec); |
be4d1333 MS |
396 | } |
397 | ||
4f69f4c2 JK |
398 | /* find_memory_region_ftype implementation. DATA is 'bfd *' for the core file |
399 | GDB is creating. */ | |
400 | ||
cbb83bd1 | 401 | static int |
4f69f4c2 JK |
402 | gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, |
403 | int write, int exec, int modified, void *data) | |
be4d1333 | 404 | { |
9a3c8263 | 405 | bfd *obfd = (bfd *) data; |
be4d1333 | 406 | asection *osec; |
cbb83bd1 RM |
407 | flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; |
408 | ||
86fbe6cc EZ |
409 | /* If the memory segment has no permissions set, ignore it, otherwise |
410 | when we later try to access it for read/write, we'll get an error | |
411 | or jam the kernel. */ | |
4f69f4c2 | 412 | if (read == 0 && write == 0 && exec == 0 && modified == 0) |
86fbe6cc EZ |
413 | { |
414 | if (info_verbose) | |
415 | { | |
5af949e3 | 416 | fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n", |
f5656ead | 417 | plongest (size), paddress (target_gdbarch (), vaddr)); |
86fbe6cc EZ |
418 | } |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
4f69f4c2 | 423 | if (write == 0 && modified == 0 && !solib_keep_data_in_core (vaddr, size)) |
cbb83bd1 RM |
424 | { |
425 | /* See if this region of memory lies inside a known file on disk. | |
426 | If so, we can avoid copying its contents by clearing SEC_LOAD. */ | |
cbb83bd1 RM |
427 | struct obj_section *objsec; |
428 | ||
3b9d3ac2 TT |
429 | for (objfile *objfile : all_objfiles (current_program_space)) |
430 | ALL_OBJFILE_OSECTIONS (objfile, objsec) | |
431 | { | |
432 | bfd *abfd = objfile->obfd; | |
433 | asection *asec = objsec->the_bfd_section; | |
434 | bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, | |
435 | asec); | |
436 | bfd_vma start = obj_section_addr (objsec) & -align; | |
437 | bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; | |
438 | ||
439 | /* Match if either the entire memory region lies inside the | |
440 | section (i.e. a mapping covering some pages of a large | |
441 | segment) or the entire section lies inside the memory region | |
442 | (i.e. a mapping covering multiple small sections). | |
443 | ||
444 | This BFD was synthesized from reading target memory, | |
445 | we don't want to omit that. */ | |
446 | if (objfile->separate_debug_objfile_backlink == NULL | |
447 | && ((vaddr >= start && vaddr + size <= end) | |
448 | || (start >= vaddr && end <= vaddr + size)) | |
449 | && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) | |
450 | { | |
451 | flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); | |
452 | goto keep; /* Break out of two nested for loops. */ | |
453 | } | |
454 | } | |
cbb83bd1 | 455 | |
4f69f4c2 | 456 | keep:; |
cbb83bd1 RM |
457 | } |
458 | ||
4f69f4c2 JK |
459 | if (write == 0) |
460 | flags |= SEC_READONLY; | |
461 | ||
cbb83bd1 RM |
462 | if (exec) |
463 | flags |= SEC_CODE; | |
464 | else | |
465 | flags |= SEC_DATA; | |
be4d1333 | 466 | |
52b57208 | 467 | osec = bfd_make_section_anyway_with_flags (obfd, "load", flags); |
d3420b2f | 468 | if (osec == NULL) |
be4d1333 | 469 | { |
8a3fe4f8 | 470 | warning (_("Couldn't make gcore segment: %s"), |
be4d1333 | 471 | bfd_errmsg (bfd_get_error ())); |
cbb83bd1 | 472 | return 1; |
be4d1333 MS |
473 | } |
474 | ||
475 | if (info_verbose) | |
476 | { | |
5af949e3 | 477 | fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n", |
f5656ead | 478 | plongest (size), paddress (target_gdbarch (), vaddr)); |
be4d1333 MS |
479 | } |
480 | ||
481 | bfd_set_section_size (obfd, osec, size); | |
cbb83bd1 | 482 | bfd_set_section_vma (obfd, osec, vaddr); |
d3420b2f | 483 | bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */ |
cbb83bd1 | 484 | return 0; |
be4d1333 MS |
485 | } |
486 | ||
b427c1bc TT |
487 | int |
488 | objfile_find_memory_regions (struct target_ops *self, | |
489 | find_memory_region_ftype func, void *obfd) | |
be4d1333 | 490 | { |
d3420b2f | 491 | /* Use objfile data to create memory sections. */ |
be4d1333 MS |
492 | struct obj_section *objsec; |
493 | bfd_vma temp_bottom, temp_top; | |
494 | ||
d3420b2f | 495 | /* Call callback function for each objfile section. */ |
3b9d3ac2 TT |
496 | for (objfile *objfile : all_objfiles (current_program_space)) |
497 | ALL_OBJFILE_OSECTIONS (objfile, objsec) | |
498 | { | |
499 | bfd *ibfd = objfile->obfd; | |
500 | asection *isec = objsec->the_bfd_section; | |
501 | flagword flags = bfd_get_section_flags (ibfd, isec); | |
502 | ||
503 | /* Separate debug info files are irrelevant for gcore. */ | |
504 | if (objfile->separate_debug_objfile_backlink != NULL) | |
505 | continue; | |
506 | ||
507 | if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) | |
508 | { | |
509 | int size = bfd_section_size (ibfd, isec); | |
510 | int ret; | |
511 | ||
512 | ret = (*func) (obj_section_addr (objsec), size, | |
513 | 1, /* All sections will be readable. */ | |
514 | (flags & SEC_READONLY) == 0, /* Writable. */ | |
515 | (flags & SEC_CODE) != 0, /* Executable. */ | |
516 | 1, /* MODIFIED is unknown, pass it as true. */ | |
517 | obfd); | |
518 | if (ret != 0) | |
519 | return ret; | |
520 | } | |
521 | } | |
be4d1333 | 522 | |
d3420b2f | 523 | /* Make a stack segment. */ |
be4d1333 | 524 | if (derive_stack_segment (&temp_bottom, &temp_top)) |
cbb83bd1 | 525 | (*func) (temp_bottom, temp_top - temp_bottom, |
d3420b2f MK |
526 | 1, /* Stack section will be readable. */ |
527 | 1, /* Stack section will be writable. */ | |
528 | 0, /* Stack section will not be executable. */ | |
4f69f4c2 | 529 | 1, /* Stack section will be modified. */ |
be4d1333 MS |
530 | obfd); |
531 | ||
0963b4bd | 532 | /* Make a heap segment. */ |
be4d1333 | 533 | if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) |
d3420b2f MK |
534 | (*func) (temp_bottom, temp_top - temp_bottom, |
535 | 1, /* Heap section will be readable. */ | |
536 | 1, /* Heap section will be writable. */ | |
537 | 0, /* Heap section will not be executable. */ | |
4f69f4c2 | 538 | 1, /* Heap section will be modified. */ |
be4d1333 | 539 | obfd); |
d3420b2f | 540 | |
be4d1333 MS |
541 | return 0; |
542 | } | |
543 | ||
544 | static void | |
545 | gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) | |
546 | { | |
804e0f53 DJ |
547 | bfd_size_type size, total_size = bfd_section_size (obfd, osec); |
548 | file_ptr offset = 0; | |
be4d1333 | 549 | |
cbb83bd1 RM |
550 | /* Read-only sections are marked; we don't have to copy their contents. */ |
551 | if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) | |
d3420b2f MK |
552 | return; |
553 | ||
554 | /* Only interested in "load" sections. */ | |
61012eef | 555 | if (!startswith (bfd_section_name (obfd, osec), "load")) |
d3420b2f | 556 | return; |
be4d1333 | 557 | |
325fac50 | 558 | size = std::min (total_size, (bfd_size_type) MAX_COPY_BYTES); |
26fcd5d7 | 559 | gdb::byte_vector memhunk (size); |
be4d1333 | 560 | |
804e0f53 DJ |
561 | while (total_size > 0) |
562 | { | |
563 | if (size > total_size) | |
564 | size = total_size; | |
565 | ||
566 | if (target_read_memory (bfd_section_vma (obfd, osec) + offset, | |
26fcd5d7 | 567 | memhunk.data (), size) != 0) |
804e0f53 | 568 | { |
3e43a32a MS |
569 | warning (_("Memory read failed for corefile " |
570 | "section, %s bytes at %s."), | |
5af949e3 | 571 | plongest (size), |
f5656ead | 572 | paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); |
804e0f53 DJ |
573 | break; |
574 | } | |
26fcd5d7 TT |
575 | if (!bfd_set_section_contents (obfd, osec, memhunk.data (), |
576 | offset, size)) | |
804e0f53 DJ |
577 | { |
578 | warning (_("Failed to write corefile contents (%s)."), | |
579 | bfd_errmsg (bfd_get_error ())); | |
580 | break; | |
581 | } | |
582 | ||
583 | total_size -= size; | |
584 | offset += size; | |
585 | } | |
be4d1333 MS |
586 | } |
587 | ||
588 | static int | |
589 | gcore_memory_sections (bfd *obfd) | |
590 | { | |
35c2fab7 | 591 | /* Try gdbarch method first, then fall back to target method. */ |
f5656ead TT |
592 | if (!gdbarch_find_memory_regions_p (target_gdbarch ()) |
593 | || gdbarch_find_memory_regions (target_gdbarch (), | |
35c2fab7 UW |
594 | gcore_create_callback, obfd) != 0) |
595 | { | |
596 | if (target_find_memory_regions (gcore_create_callback, obfd) != 0) | |
597 | return 0; /* FIXME: error return/msg? */ | |
598 | } | |
be4d1333 | 599 | |
d3420b2f | 600 | /* Record phdrs for section-to-segment mapping. */ |
be4d1333 MS |
601 | bfd_map_over_sections (obfd, make_output_phdrs, NULL); |
602 | ||
d3420b2f | 603 | /* Copy memory region contents. */ |
be4d1333 MS |
604 | bfd_map_over_sections (obfd, gcore_copy_callback, NULL); |
605 | ||
d3420b2f | 606 | return 1; |
be4d1333 MS |
607 | } |
608 | ||
609 | void | |
610 | _initialize_gcore (void) | |
611 | { | |
1bedd215 | 612 | add_com ("generate-core-file", class_files, gcore_command, _("\ |
d3420b2f | 613 | Save a core file with the current state of the debugged process.\n\ |
0cab2f1e TT |
614 | Usage: generate-core-file [FILENAME]\n\ |
615 | Argument is optional filename. Default filename is 'core.PROCESS_ID'.")); | |
be4d1333 MS |
616 | |
617 | add_com_alias ("gcore", "generate-core-file", class_files, 1); | |
be4d1333 | 618 | } |