Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / gdb / exec.c
CommitLineData
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1/* Work with executable files, for GDB.
2
ef5ccd6c 3 Copyright (C) 1988-2013 Free Software Foundation, Inc.
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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
9 the Free Software Foundation; either version 3 of the License, or
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
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20#include "defs.h"
21#include "frame.h"
22#include "inferior.h"
23#include "target.h"
24#include "gdbcmd.h"
25#include "language.h"
c50c785c 26#include "filenames.h"
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27#include "symfile.h"
28#include "objfiles.h"
29#include "completer.h"
30#include "value.h"
31#include "exec.h"
32#include "observer.h"
33#include "arch-utils.h"
cf7f2e2d
JM
34#include "gdbthread.h"
35#include "progspace.h"
ef5ccd6c 36#include "gdb_bfd.h"
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37
38#include <fcntl.h>
39#include "readline/readline.h"
40#include "gdb_string.h"
41
42#include "gdbcore.h"
43
44#include <ctype.h>
45#include "gdb_stat.h"
46
47#include "xcoffsolib.h"
48
49struct vmap *map_vmap (bfd *, bfd *);
50
51void (*deprecated_file_changed_hook) (char *);
52
53/* Prototypes for local functions */
54
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55static void file_command (char *, int);
56
57static void set_section_command (char *, int);
58
59static void exec_files_info (struct target_ops *);
60
61static void init_exec_ops (void);
62
63void _initialize_exec (void);
64
65/* The target vector for executable files. */
66
67struct target_ops exec_ops;
68
cf7f2e2d
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69/* True if the exec target is pushed on the stack. */
70static int using_exec_ops;
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71
72/* Whether to open exec and core files read-only or read-write. */
73
74int write_files = 0;
75static void
76show_write_files (struct ui_file *file, int from_tty,
77 struct cmd_list_element *c, const char *value)
78{
79 fprintf_filtered (file, _("Writing into executable and core files is %s.\n"),
80 value);
81}
82
83
84struct vmap *vmap;
85
86static void
87exec_open (char *args, int from_tty)
88{
89 target_preopen (from_tty);
90 exec_file_attach (args, from_tty);
91}
92
93/* Close and clear exec_bfd. If we end up with no target sections to
94 read memory from, this unpushes the exec_ops target. */
95
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96void
97exec_close (void)
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98{
99 if (exec_bfd)
100 {
101 bfd *abfd = exec_bfd;
5796c8dc 102
ef5ccd6c 103 gdb_bfd_unref (abfd);
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104
105 /* Removing target sections may close the exec_ops target.
106 Clear exec_bfd before doing so to prevent recursion. */
107 exec_bfd = NULL;
108 exec_bfd_mtime = 0;
109
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110 remove_target_sections (&exec_bfd, abfd);
111
112 xfree (exec_filename);
113 exec_filename = NULL;
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114 }
115}
116
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117/* This is the target_close implementation. Clears all target
118 sections and closes all executable bfds from all program spaces. */
119
5796c8dc 120static void
cf7f2e2d 121exec_close_1 (int quitting)
5796c8dc 122{
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123 struct vmap *vp, *nxt;
124
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125 using_exec_ops = 0;
126
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127 for (nxt = vmap; nxt != NULL;)
128 {
129 vp = nxt;
130 nxt = vp->nxt;
131
5796c8dc 132 if (vp->objfile)
ef5ccd6c
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133 free_objfile (vp->objfile);
134
135 gdb_bfd_unref (vp->bfd);
cf7f2e2d 136
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137 xfree (vp);
138 }
139
140 vmap = NULL;
141
cf7f2e2d
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142 {
143 struct program_space *ss;
144 struct cleanup *old_chain;
5796c8dc 145
cf7f2e2d
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146 old_chain = save_current_program_space ();
147 ALL_PSPACES (ss)
148 {
149 set_current_program_space (ss);
150
151 /* Delete all target sections. */
152 resize_section_table
153 (current_target_sections,
154 -resize_section_table (current_target_sections, 0));
155
156 exec_close ();
157 }
158
159 do_cleanups (old_chain);
160 }
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161}
162
163void
164exec_file_clear (int from_tty)
165{
166 /* Remove exec file. */
cf7f2e2d 167 exec_close ();
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168
169 if (from_tty)
170 printf_unfiltered (_("No executable file now.\n"));
171}
172
173/* Set FILENAME as the new exec file.
174
175 This function is intended to be behave essentially the same
176 as exec_file_command, except that the latter will detect when
177 a target is being debugged, and will ask the user whether it
178 should be shut down first. (If the answer is "no", then the
179 new file is ignored.)
180
181 This file is used by exec_file_command, to do the work of opening
182 and processing the exec file after any prompting has happened.
183
184 And, it is used by child_attach, when the attach command was
185 given a pid but not a exec pathname, and the attach command could
186 figure out the pathname from the pid. (In this case, we shouldn't
187 ask the user whether the current target should be shut down --
188 we're supplying the exec pathname late for good reason.) */
189
190void
191exec_file_attach (char *filename, int from_tty)
192{
193 /* Remove any previous exec file. */
cf7f2e2d 194 exec_close ();
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195
196 /* Now open and digest the file the user requested, if any. */
197
198 if (!filename)
199 {
200 if (from_tty)
201 printf_unfiltered (_("No executable file now.\n"));
202
203 set_gdbarch_from_file (NULL);
204 }
205 else
206 {
207 struct cleanup *cleanups;
ef5ccd6c 208 char *scratch_pathname, *canonical_pathname;
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209 int scratch_chan;
210 struct target_section *sections = NULL, *sections_end = NULL;
cf7f2e2d 211 char **matching;
5796c8dc 212
ef5ccd6c
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213 scratch_chan = openp (getenv ("PATH"),
214 OPF_TRY_CWD_FIRST | OPF_DISABLE_REALPATH, filename,
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215 write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
216 &scratch_pathname);
217#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
218 if (scratch_chan < 0)
219 {
220 char *exename = alloca (strlen (filename) + 5);
cf7f2e2d 221
5796c8dc 222 strcat (strcpy (exename, filename), ".exe");
ef5ccd6c
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223 scratch_chan = openp (getenv ("PATH"),
224 OPF_TRY_CWD_FIRST | OPF_DISABLE_REALPATH,
225 exename,
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226 write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
227 &scratch_pathname);
228 }
229#endif
230 if (scratch_chan < 0)
231 perror_with_name (filename);
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232
233 cleanups = make_cleanup (xfree, scratch_pathname);
234
235 /* gdb_bfd_open (and its variants) prefers canonicalized pathname for
236 better BFD caching. */
237 canonical_pathname = gdb_realpath (scratch_pathname);
238 make_cleanup (xfree, canonical_pathname);
239
240 if (write_files)
241 exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget,
242 FOPEN_RUB, scratch_chan);
243 else
244 exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan);
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245
246 if (!exec_bfd)
247 {
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248 error (_("\"%s\": could not open as an executable file: %s"),
249 scratch_pathname, bfd_errmsg (bfd_get_error ()));
250 }
251
ef5ccd6c
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252 gdb_assert (exec_filename == NULL);
253 exec_filename = xstrdup (scratch_pathname);
5796c8dc 254
cf7f2e2d 255 if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching))
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256 {
257 /* Make sure to close exec_bfd, or else "run" might try to use
258 it. */
cf7f2e2d 259 exec_close ();
5796c8dc 260 error (_("\"%s\": not in executable format: %s"),
cf7f2e2d
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261 scratch_pathname,
262 gdb_bfd_errmsg (bfd_get_error (), matching));
5796c8dc
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263 }
264
265 /* FIXME - This should only be run for RS6000, but the ifdef is a poor
266 way to accomplish. */
267#ifdef DEPRECATED_IBM6000_TARGET
c50c785c 268 /* Setup initial vmap. */
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269
270 map_vmap (exec_bfd, 0);
271 if (vmap == NULL)
272 {
273 /* Make sure to close exec_bfd, or else "run" might try to use
274 it. */
cf7f2e2d 275 exec_close ();
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276 error (_("\"%s\": can't find the file sections: %s"),
277 scratch_pathname, bfd_errmsg (bfd_get_error ()));
278 }
279#endif /* DEPRECATED_IBM6000_TARGET */
280
281 if (build_section_table (exec_bfd, &sections, &sections_end))
282 {
283 /* Make sure to close exec_bfd, or else "run" might try to use
284 it. */
cf7f2e2d 285 exec_close ();
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286 error (_("\"%s\": can't find the file sections: %s"),
287 scratch_pathname, bfd_errmsg (bfd_get_error ()));
288 }
289
290 exec_bfd_mtime = bfd_get_mtime (exec_bfd);
291
292 validate_files ();
293
294 set_gdbarch_from_file (exec_bfd);
295
296 /* Add the executable's sections to the current address spaces'
cf7f2e2d
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297 list of sections. This possibly pushes the exec_ops
298 target. */
ef5ccd6c 299 add_target_sections (&exec_bfd, sections, sections_end);
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300 xfree (sections);
301
302 /* Tell display code (if any) about the changed file name. */
303 if (deprecated_exec_file_display_hook)
304 (*deprecated_exec_file_display_hook) (filename);
305
306 do_cleanups (cleanups);
307 }
308 bfd_cache_close_all ();
309 observer_notify_executable_changed ();
310}
311
312/* Process the first arg in ARGS as the new exec file.
313
314 Note that we have to explicitly ignore additional args, since we can
315 be called from file_command(), which also calls symbol_file_command()
316 which can take multiple args.
317
c50c785c 318 If ARGS is NULL, we just want to close the exec file. */
5796c8dc
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319
320static void
321exec_file_command (char *args, int from_tty)
322{
323 char **argv;
324 char *filename;
325
326 if (from_tty && target_has_execution
327 && !query (_("A program is being debugged already.\n"
328 "Are you sure you want to change the file? ")))
329 error (_("File not changed."));
330
331 if (args)
332 {
333 struct cleanup *cleanups;
334
335 /* Scan through the args and pick up the first non option arg
336 as the filename. */
337
338 argv = gdb_buildargv (args);
339 cleanups = make_cleanup_freeargv (argv);
340
341 for (; (*argv != NULL) && (**argv == '-'); argv++)
342 {;
343 }
344 if (*argv == NULL)
345 error (_("No executable file name was specified"));
346
347 filename = tilde_expand (*argv);
348 make_cleanup (xfree, filename);
349 exec_file_attach (filename, from_tty);
350
351 do_cleanups (cleanups);
352 }
353 else
354 exec_file_attach (NULL, from_tty);
355}
356
c50c785c 357/* Set both the exec file and the symbol file, in one command.
5796c8dc
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358 What a novelty. Why did GDB go through four major releases before this
359 command was added? */
360
361static void
362file_command (char *arg, int from_tty)
363{
364 /* FIXME, if we lose on reading the symbol file, we should revert
365 the exec file, but that's rough. */
366 exec_file_command (arg, from_tty);
367 symbol_file_command (arg, from_tty);
368 if (deprecated_file_changed_hook)
369 deprecated_file_changed_hook (arg);
370}
371\f
372
c50c785c 373/* Locate all mappable sections of a BFD file.
5796c8dc
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374 table_pp_char is a char * to get it through bfd_map_over_sections;
375 we cast it back to its proper type. */
376
377static void
378add_to_section_table (bfd *abfd, struct bfd_section *asect,
379 void *table_pp_char)
380{
381 struct target_section **table_pp = (struct target_section **) table_pp_char;
382 flagword aflag;
383
384 /* Check the section flags, but do not discard zero-length sections, since
385 some symbols may still be attached to this section. For instance, we
386 encountered on sparc-solaris 2.10 a shared library with an empty .bss
387 section to which a symbol named "_end" was attached. The address
388 of this symbol still needs to be relocated. */
389 aflag = bfd_get_section_flags (abfd, asect);
390 if (!(aflag & SEC_ALLOC))
391 return;
392
ef5ccd6c 393 (*table_pp)->key = NULL;
5796c8dc
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394 (*table_pp)->bfd = abfd;
395 (*table_pp)->the_bfd_section = asect;
396 (*table_pp)->addr = bfd_section_vma (abfd, asect);
397 (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
398 (*table_pp)++;
399}
400
401int
402resize_section_table (struct target_section_table *table, int num_added)
403{
5796c8dc
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404 int old_count;
405 int new_count;
406
5796c8dc
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407 old_count = table->sections_end - table->sections;
408
409 new_count = num_added + old_count;
410
411 if (new_count)
412 {
413 table->sections = xrealloc (table->sections,
414 sizeof (struct target_section) * new_count);
415 table->sections_end = table->sections + new_count;
416 }
417 else
418 {
419 xfree (table->sections);
420 table->sections = table->sections_end = NULL;
421 }
422
423 return old_count;
424}
425
426/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
427 Returns 0 if OK, 1 on error. */
428
429int
430build_section_table (struct bfd *some_bfd, struct target_section **start,
431 struct target_section **end)
432{
433 unsigned count;
434
435 count = bfd_count_sections (some_bfd);
436 if (*start)
437 xfree (* start);
438 *start = (struct target_section *) xmalloc (count * sizeof (**start));
439 *end = *start;
440 bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
441 if (*end > *start + count)
c50c785c
JM
442 internal_error (__FILE__, __LINE__,
443 _("failed internal consistency check"));
5796c8dc
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444 /* We could realloc the table, but it probably loses for most files. */
445 return 0;
446}
447
448/* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
449 current set of target sections. */
450
451void
ef5ccd6c
JM
452add_target_sections (void *key,
453 struct target_section *sections,
5796c8dc
SS
454 struct target_section *sections_end)
455{
456 int count;
457 struct target_section_table *table = current_target_sections;
458
459 count = sections_end - sections;
460
461 if (count > 0)
462 {
463 int space = resize_section_table (table, count);
ef5ccd6c 464 int i;
cf7f2e2d 465
ef5ccd6c
JM
466 for (i = 0; i < count; ++i)
467 {
468 table->sections[space + i] = sections[i];
469 table->sections[space + i].key = key;
470 }
5796c8dc
SS
471
472 /* If these are the first file sections we can provide memory
473 from, push the file_stratum target. */
cf7f2e2d
JM
474 if (!using_exec_ops)
475 {
476 using_exec_ops = 1;
477 push_target (&exec_ops);
478 }
5796c8dc
SS
479 }
480}
481
482/* Remove all target sections taken from ABFD. */
483
484void
ef5ccd6c 485remove_target_sections (void *key, bfd *abfd)
5796c8dc
SS
486{
487 struct target_section *src, *dest;
5796c8dc
SS
488 struct target_section_table *table = current_target_sections;
489
490 dest = table->sections;
491 for (src = table->sections; src < table->sections_end; src++)
ef5ccd6c 492 if (src->key != key || src->bfd != abfd)
5796c8dc
SS
493 {
494 /* Keep this section. */
495 if (dest < src)
496 *dest = *src;
497 dest++;
498 }
499
500 /* If we've dropped any sections, resize the section table. */
501 if (dest < src)
502 {
503 int old_count;
504
505 old_count = resize_section_table (table, dest - src);
506
507 /* If we don't have any more sections to read memory from,
508 remove the file_stratum target from the stack. */
509 if (old_count + (dest - src) == 0)
cf7f2e2d
JM
510 {
511 struct program_space *pspace;
512
513 ALL_PSPACES (pspace)
514 if (pspace->target_sections.sections
515 != pspace->target_sections.sections_end)
516 return;
517
518 unpush_target (&exec_ops);
519 }
5796c8dc
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520 }
521}
522
523\f
524static void
525bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3)
526{
527 struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3;
528 struct vmap *vp;
529
530 vp = vmap_bfd->pvmap;
531
532 if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0)
533 return;
534
535 if (strcmp (bfd_section_name (abfd, sect), ".text") == 0)
536 {
537 vp->tstart = bfd_section_vma (abfd, sect);
538 vp->tend = vp->tstart + bfd_section_size (abfd, sect);
539 vp->tvma = bfd_section_vma (abfd, sect);
540 vp->toffs = sect->filepos;
541 }
542 else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0)
543 {
544 vp->dstart = bfd_section_vma (abfd, sect);
545 vp->dend = vp->dstart + bfd_section_size (abfd, sect);
546 vp->dvma = bfd_section_vma (abfd, sect);
547 }
c50c785c 548 /* Silently ignore other types of sections. (FIXME?) */
5796c8dc
SS
549}
550
551/* Make a vmap for ABFD which might be a member of the archive ARCH.
552 Return the new vmap. */
553
554struct vmap *
555map_vmap (bfd *abfd, bfd *arch)
556{
557 struct vmap_and_bfd vmap_bfd;
558 struct vmap *vp, **vpp;
559
560 vp = (struct vmap *) xmalloc (sizeof (*vp));
561 memset ((char *) vp, '\0', sizeof (*vp));
562 vp->nxt = 0;
563 vp->bfd = abfd;
ef5ccd6c 564 gdb_bfd_ref (abfd);
5796c8dc
SS
565 vp->name = bfd_get_filename (arch ? arch : abfd);
566 vp->member = arch ? bfd_get_filename (abfd) : "";
567
568 vmap_bfd.pbfd = arch;
569 vmap_bfd.pvmap = vp;
570 bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd);
571
c50c785c 572 /* Find the end of the list and append. */
5796c8dc
SS
573 for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
574 ;
575 *vpp = vp;
576
577 return vp;
578}
579\f
580
c50c785c
JM
581VEC(mem_range_s) *
582section_table_available_memory (VEC(mem_range_s) *memory,
583 CORE_ADDR memaddr, ULONGEST len,
584 struct target_section *sections,
585 struct target_section *sections_end)
586{
587 struct target_section *p;
588
589 for (p = sections; p < sections_end; p++)
590 {
591 if ((bfd_get_section_flags (p->bfd, p->the_bfd_section)
592 & SEC_READONLY) == 0)
593 continue;
594
595 /* Copy the meta-data, adjusted. */
596 if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len))
597 {
598 ULONGEST lo1, hi1, lo2, hi2;
599 struct mem_range *r;
600
601 lo1 = memaddr;
602 hi1 = memaddr + len;
603
604 lo2 = p->addr;
605 hi2 = p->endaddr;
606
607 r = VEC_safe_push (mem_range_s, memory, NULL);
608
609 r->start = max (lo1, lo2);
610 r->length = min (hi1, hi2) - r->start;
611 }
612 }
613
614 return memory;
615}
616
5796c8dc
SS
617int
618section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
619 ULONGEST offset, LONGEST len,
620 struct target_section *sections,
621 struct target_section *sections_end,
622 const char *section_name)
623{
624 int res;
625 struct target_section *p;
626 ULONGEST memaddr = offset;
627 ULONGEST memend = memaddr + len;
628
629 if (len <= 0)
c50c785c
JM
630 internal_error (__FILE__, __LINE__,
631 _("failed internal consistency check"));
5796c8dc
SS
632
633 for (p = sections; p < sections_end; p++)
634 {
635 if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0)
c50c785c 636 continue; /* not the section we need. */
5796c8dc
SS
637 if (memaddr >= p->addr)
638 {
639 if (memend <= p->endaddr)
640 {
641 /* Entire transfer is within this section. */
642 if (writebuf)
643 res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
644 writebuf, memaddr - p->addr,
645 len);
646 else
647 res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
648 readbuf, memaddr - p->addr,
649 len);
650 return (res != 0) ? len : 0;
651 }
652 else if (memaddr >= p->endaddr)
653 {
654 /* This section ends before the transfer starts. */
655 continue;
656 }
657 else
658 {
659 /* This section overlaps the transfer. Just do half. */
660 len = p->endaddr - memaddr;
661 if (writebuf)
662 res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
663 writebuf, memaddr - p->addr,
664 len);
665 else
666 res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
667 readbuf, memaddr - p->addr,
668 len);
669 return (res != 0) ? len : 0;
670 }
671 }
672 }
673
c50c785c 674 return 0; /* We can't help. */
5796c8dc
SS
675}
676
ef5ccd6c 677static struct target_section_table *
5796c8dc
SS
678exec_get_section_table (struct target_ops *ops)
679{
680 return current_target_sections;
681}
682
683static LONGEST
684exec_xfer_partial (struct target_ops *ops, enum target_object object,
685 const char *annex, gdb_byte *readbuf,
686 const gdb_byte *writebuf,
687 ULONGEST offset, LONGEST len)
688{
689 struct target_section_table *table = target_get_section_table (ops);
690
691 if (object == TARGET_OBJECT_MEMORY)
692 return section_table_xfer_memory_partial (readbuf, writebuf,
693 offset, len,
694 table->sections,
695 table->sections_end,
696 NULL);
697 else
698 return -1;
699}
700\f
701
702void
703print_section_info (struct target_section_table *t, bfd *abfd)
704{
705 struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
706 struct target_section *p;
707 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
708 int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16;
709
710 printf_filtered ("\t`%s', ", bfd_get_filename (abfd));
711 wrap_here (" ");
712 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd));
713 if (abfd == exec_bfd)
cf7f2e2d 714 {
c50c785c
JM
715 /* gcc-3.4 does not like the initialization in
716 <p == t->sections_end>. */
cf7f2e2d
JM
717 bfd_vma displacement = 0;
718 bfd_vma entry_point;
719
720 for (p = t->sections; p < t->sections_end; p++)
721 {
722 asection *asect = p->the_bfd_section;
723
724 if ((bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD))
725 != (SEC_ALLOC | SEC_LOAD))
726 continue;
727
728 if (bfd_get_section_vma (abfd, asect) <= abfd->start_address
729 && abfd->start_address < (bfd_get_section_vma (abfd, asect)
730 + bfd_get_section_size (asect)))
731 {
732 displacement = p->addr - bfd_get_section_vma (abfd, asect);
733 break;
734 }
735 }
736 if (p == t->sections_end)
c50c785c 737 warning (_("Cannot find section for the entry point of %s."),
cf7f2e2d
JM
738 bfd_get_filename (abfd));
739
740 entry_point = gdbarch_addr_bits_remove (gdbarch,
741 bfd_get_start_address (abfd)
742 + displacement);
743 printf_filtered (_("\tEntry point: %s\n"),
744 paddress (gdbarch, entry_point));
745 }
5796c8dc
SS
746 for (p = t->sections; p < t->sections_end; p++)
747 {
748 printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
749 printf_filtered (" - %s", hex_string_custom (p->endaddr, wid));
750
751 /* FIXME: A format of "08l" is not wide enough for file offsets
752 larger than 4GB. OTOH, making it "016l" isn't desirable either
753 since most output will then be much wider than necessary. It
754 may make sense to test the size of the file and choose the
755 format string accordingly. */
756 /* FIXME: i18n: Need to rewrite this sentence. */
757 if (info_verbose)
758 printf_filtered (" @ %s",
759 hex_string_custom (p->the_bfd_section->filepos, 8));
c50c785c
JM
760 printf_filtered (" is %s", bfd_section_name (p->bfd,
761 p->the_bfd_section));
5796c8dc
SS
762 if (p->bfd != abfd)
763 printf_filtered (" in %s", bfd_get_filename (p->bfd));
764 printf_filtered ("\n");
765 }
766}
767
768static void
769exec_files_info (struct target_ops *t)
770{
ef5ccd6c
JM
771 if (exec_bfd)
772 print_section_info (current_target_sections, exec_bfd);
773 else
774 puts_filtered (_("\t<no file loaded>\n"));
5796c8dc
SS
775
776 if (vmap)
777 {
ef5ccd6c 778 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
5796c8dc
SS
779 struct vmap *vp;
780
781 printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name);
782 printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n",
783 addr_size * 2, "tstart",
784 addr_size * 2, "tend",
785 addr_size * 2, "dstart",
786 addr_size * 2, "dend",
787 "section",
788 "file(member)");
789
790 for (vp = vmap; vp; vp = vp->nxt)
791 printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n",
792 phex (vp->tstart, addr_size),
793 phex (vp->tend, addr_size),
794 phex (vp->dstart, addr_size),
795 phex (vp->dend, addr_size),
796 vp->name,
797 *vp->member ? "(" : "", vp->member,
798 *vp->member ? ")" : "");
799 }
800}
801
802static void
803set_section_command (char *args, int from_tty)
804{
805 struct target_section *p;
806 char *secname;
807 unsigned seclen;
808 unsigned long secaddr;
809 char secprint[100];
810 long offset;
811 struct target_section_table *table;
812
813 if (args == 0)
814 error (_("Must specify section name and its virtual address"));
815
c50c785c 816 /* Parse out section name. */
5796c8dc
SS
817 for (secname = args; !isspace (*args); args++);
818 seclen = args - secname;
819
c50c785c 820 /* Parse out new virtual address. */
5796c8dc
SS
821 secaddr = parse_and_eval_address (args);
822
823 table = current_target_sections;
824 for (p = table->sections; p < table->sections_end; p++)
825 {
ef5ccd6c 826 if (!strncmp (secname, bfd_section_name (p->bfd,
c50c785c 827 p->the_bfd_section), seclen)
ef5ccd6c 828 && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0')
5796c8dc
SS
829 {
830 offset = secaddr - p->addr;
831 p->addr += offset;
832 p->endaddr += offset;
833 if (from_tty)
834 exec_files_info (&exec_ops);
835 return;
836 }
837 }
838 if (seclen >= sizeof (secprint))
839 seclen = sizeof (secprint) - 1;
840 strncpy (secprint, secname, seclen);
841 secprint[seclen] = '\0';
842 error (_("Section %s not found"), secprint);
843}
844
845/* If we can find a section in FILENAME with BFD index INDEX, adjust
846 it to ADDRESS. */
847
848void
849exec_set_section_address (const char *filename, int index, CORE_ADDR address)
850{
851 struct target_section *p;
852 struct target_section_table *table;
853
854 table = current_target_sections;
855 for (p = table->sections; p < table->sections_end; p++)
856 {
c50c785c 857 if (filename_cmp (filename, p->bfd->filename) == 0
5796c8dc
SS
858 && index == p->the_bfd_section->index)
859 {
860 p->endaddr += address - p->addr;
861 p->addr = address;
862 }
863 }
864}
865
866/* If mourn is being called in all the right places, this could be say
867 `gdb internal error' (since generic_mourn calls
868 breakpoint_init_inferior). */
869
870static int
871ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt)
872{
873 return 0;
874}
875
876static int
877exec_has_memory (struct target_ops *ops)
878{
879 /* We can provide memory if we have any file/target sections to read
880 from. */
881 return (current_target_sections->sections
882 != current_target_sections->sections_end);
883}
884
c50c785c 885/* Find mapped memory. */
5796c8dc
SS
886
887extern void
c50c785c 888exec_set_find_memory_regions (int (*func) (find_memory_region_ftype, void *))
5796c8dc
SS
889{
890 exec_ops.to_find_memory_regions = func;
891}
892
893static char *exec_make_note_section (bfd *, int *);
894
895/* Fill in the exec file target vector. Very few entries need to be
896 defined. */
897
898static void
899init_exec_ops (void)
900{
901 exec_ops.to_shortname = "exec";
902 exec_ops.to_longname = "Local exec file";
903 exec_ops.to_doc = "Use an executable file as a target.\n\
904Specify the filename of the executable file.";
905 exec_ops.to_open = exec_open;
cf7f2e2d 906 exec_ops.to_close = exec_close_1;
5796c8dc
SS
907 exec_ops.to_attach = find_default_attach;
908 exec_ops.to_xfer_partial = exec_xfer_partial;
909 exec_ops.to_get_section_table = exec_get_section_table;
910 exec_ops.to_files_info = exec_files_info;
911 exec_ops.to_insert_breakpoint = ignore;
912 exec_ops.to_remove_breakpoint = ignore;
913 exec_ops.to_create_inferior = find_default_create_inferior;
914 exec_ops.to_stratum = file_stratum;
915 exec_ops.to_has_memory = exec_has_memory;
916 exec_ops.to_make_corefile_notes = exec_make_note_section;
917 exec_ops.to_magic = OPS_MAGIC;
918}
919
920void
921_initialize_exec (void)
922{
923 struct cmd_list_element *c;
924
925 init_exec_ops ();
926
927 if (!dbx_commands)
928 {
929 c = add_cmd ("file", class_files, file_command, _("\
930Use FILE as program to be debugged.\n\
931It is read for its symbols, for getting the contents of pure memory,\n\
932and it is the program executed when you use the `run' command.\n\
933If FILE cannot be found as specified, your execution directory path\n\
934($PATH) is searched for a command of that name.\n\
935No arg means to have no executable file and no symbols."), &cmdlist);
936 set_cmd_completer (c, filename_completer);
937 }
938
939 c = add_cmd ("exec-file", class_files, exec_file_command, _("\
940Use FILE as program for getting contents of pure memory.\n\
941If FILE cannot be found as specified, your execution directory path\n\
942is searched for a command of that name.\n\
943No arg means have no executable file."), &cmdlist);
944 set_cmd_completer (c, filename_completer);
945
946 add_com ("section", class_files, set_section_command, _("\
947Change the base address of section SECTION of the exec file to ADDR.\n\
948This can be used if the exec file does not contain section addresses,\n\
949(such as in the a.out format), or when the addresses specified in the\n\
950file itself are wrong. Each section must be changed separately. The\n\
951``info files'' command lists all the sections and their addresses."));
952
953 add_setshow_boolean_cmd ("write", class_support, &write_files, _("\
954Set writing into executable and core files."), _("\
955Show writing into executable and core files."), NULL,
956 NULL,
957 show_write_files,
958 &setlist, &showlist);
959
960 add_target (&exec_ops);
961}
962
963static char *
964exec_make_note_section (bfd *obfd, int *note_size)
965{
966 error (_("Can't create a corefile"));
967}