1 /* Work with executable files, for GDB.
3 Copyright (C) 1988-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
26 #include "filenames.h"
29 #include "completer.h"
33 #include "arch-utils.h"
34 #include "gdbthread.h"
35 #include "progspace.h"
40 #include "readline/readline.h"
48 void (*deprecated_file_changed_hook) (char *);
50 /* Prototypes for local functions */
52 static void file_command (char *, int);
54 static void set_section_command (char *, int);
56 static void exec_files_info (struct target_ops *);
58 static void init_exec_ops (void);
60 void _initialize_exec (void);
62 /* The target vector for executable files. */
64 static struct target_ops exec_ops;
66 /* Whether to open exec and core files read-only or read-write. */
70 show_write_files (struct ui_file *file, int from_tty,
71 struct cmd_list_element *c, const char *value)
73 fprintf_filtered (file, _("Writing into executable and core files is %s.\n"),
79 exec_open (const char *args, int from_tty)
81 target_preopen (from_tty);
82 exec_file_attach (args, from_tty);
85 /* Close and clear exec_bfd. If we end up with no target sections to
86 read memory from, this unpushes the exec_ops target. */
97 /* Removing target sections may close the exec_ops target.
98 Clear exec_bfd before doing so to prevent recursion. */
102 remove_target_sections (&exec_bfd);
104 xfree (exec_filename);
105 exec_filename = NULL;
109 /* This is the target_close implementation. Clears all target
110 sections and closes all executable bfds from all program spaces. */
113 exec_close_1 (struct target_ops *self)
115 struct program_space *ss;
116 struct cleanup *old_chain;
118 old_chain = save_current_program_space ();
121 set_current_program_space (ss);
122 clear_section_table (current_target_sections);
126 do_cleanups (old_chain);
130 exec_file_clear (int from_tty)
132 /* Remove exec file. */
136 printf_unfiltered (_("No executable file now.\n"));
142 try_open_exec_file (const char *exec_file_host, struct inferior *inf,
143 symfile_add_flags add_flags)
145 struct cleanup *old_chain;
146 struct gdb_exception prev_err = exception_none;
148 old_chain = make_cleanup (free_current_contents, &prev_err.message);
150 /* exec_file_attach and symbol_file_add_main may throw an error if the file
151 cannot be opened either locally or remotely.
153 This happens for example, when the file is first found in the local
154 sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
155 exist in the target filesystem, or when the file does exist, but
158 Even without a symbol file, the remote-based debugging session should
159 continue normally instead of ending abruptly. Hence we catch thrown
160 errors/exceptions in the following code. */
163 /* We must do this step even if exec_file_host is NULL, so that
164 exec_file_attach will clear state. */
165 exec_file_attach (exec_file_host, add_flags & SYMFILE_VERBOSE);
167 CATCH (err, RETURN_MASK_ERROR)
169 if (err.message != NULL)
170 warning ("%s", err.message);
174 /* Save message so it doesn't get trashed by the catch below. */
175 if (err.message != NULL)
176 prev_err.message = xstrdup (err.message);
180 if (exec_file_host != NULL)
184 symbol_file_add_main (exec_file_host, add_flags);
186 CATCH (err, RETURN_MASK_ERROR)
188 if (!exception_print_same (prev_err, err))
189 warning ("%s", err.message);
194 do_cleanups (old_chain);
200 exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty)
202 char *exec_file_target, *exec_file_host;
203 struct cleanup *old_chain;
204 symfile_add_flags add_flags = 0;
206 /* Do nothing if we already have an executable filename. */
207 if (get_exec_file (0) != NULL)
210 /* Try to determine a filename from the process itself. */
211 exec_file_target = target_pid_to_exec_file (pid);
212 if (exec_file_target == NULL)
214 warning (_("No executable has been specified and target does not "
216 "determining executable automatically. "
217 "Try using the \"file\" command."));
221 exec_file_host = exec_file_find (exec_file_target, NULL);
222 old_chain = make_cleanup (xfree, exec_file_host);
225 add_flags |= SYMFILE_DEFER_BP_RESET;
228 add_flags |= SYMFILE_VERBOSE;
230 /* Attempt to open the exec file. */
231 try_open_exec_file (exec_file_host, current_inferior (), add_flags);
232 do_cleanups (old_chain);
235 /* Set FILENAME as the new exec file.
237 This function is intended to be behave essentially the same
238 as exec_file_command, except that the latter will detect when
239 a target is being debugged, and will ask the user whether it
240 should be shut down first. (If the answer is "no", then the
241 new file is ignored.)
243 This file is used by exec_file_command, to do the work of opening
244 and processing the exec file after any prompting has happened.
246 And, it is used by child_attach, when the attach command was
247 given a pid but not a exec pathname, and the attach command could
248 figure out the pathname from the pid. (In this case, we shouldn't
249 ask the user whether the current target should be shut down --
250 we're supplying the exec pathname late for good reason.) */
253 exec_file_attach (const char *filename, int from_tty)
255 struct cleanup *cleanups;
257 /* First, acquire a reference to the current exec_bfd. We release
258 this at the end of the function; but acquiring it now lets the
259 BFD cache return it if this call refers to the same file. */
260 gdb_bfd_ref (exec_bfd);
261 gdb_bfd_ref_ptr exec_bfd_holder (exec_bfd);
263 cleanups = make_cleanup (null_cleanup, NULL);
265 /* Remove any previous exec file. */
268 /* Now open and digest the file the user requested, if any. */
273 printf_unfiltered (_("No executable file now.\n"));
275 set_gdbarch_from_file (NULL);
279 int load_via_target = 0;
280 char *scratch_pathname, *canonical_pathname;
282 struct target_section *sections = NULL, *sections_end = NULL;
285 if (is_target_filename (filename))
287 if (target_filesystem_is_local ())
288 filename += strlen (TARGET_SYSROOT_PREFIX);
295 /* gdb_bfd_fopen does not support "target:" filenames. */
297 warning (_("writing into executable files is "
298 "not supported for %s sysroots"),
299 TARGET_SYSROOT_PREFIX);
301 scratch_pathname = xstrdup (filename);
302 make_cleanup (xfree, scratch_pathname);
306 canonical_pathname = scratch_pathname;
310 scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST,
311 filename, write_files ?
312 O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
314 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
315 if (scratch_chan < 0)
317 char *exename = (char *) alloca (strlen (filename) + 5);
319 strcat (strcpy (exename, filename), ".exe");
320 scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST,
321 exename, write_files ?
323 : O_RDONLY | O_BINARY,
327 if (scratch_chan < 0)
328 perror_with_name (filename);
330 make_cleanup (xfree, scratch_pathname);
332 /* gdb_bfd_open (and its variants) prefers canonicalized
333 pathname for better BFD caching. */
334 canonical_pathname = gdb_realpath (scratch_pathname);
335 make_cleanup (xfree, canonical_pathname);
338 gdb_bfd_ref_ptr temp;
339 if (write_files && !load_via_target)
340 temp = gdb_bfd_fopen (canonical_pathname, gnutarget,
341 FOPEN_RUB, scratch_chan);
343 temp = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan);
344 exec_bfd = temp.release ();
348 error (_("\"%s\": could not open as an executable file: %s."),
349 scratch_pathname, bfd_errmsg (bfd_get_error ()));
352 /* gdb_realpath_keepfile resolves symlinks on the local
353 filesystem and so cannot be used for "target:" files. */
354 gdb_assert (exec_filename == NULL);
356 exec_filename = xstrdup (bfd_get_filename (exec_bfd));
358 exec_filename = gdb_realpath_keepfile (scratch_pathname);
360 if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching))
362 /* Make sure to close exec_bfd, or else "run" might try to use
365 error (_("\"%s\": not in executable format: %s"),
367 gdb_bfd_errmsg (bfd_get_error (), matching));
370 if (build_section_table (exec_bfd, §ions, §ions_end))
372 /* Make sure to close exec_bfd, or else "run" might try to use
375 error (_("\"%s\": can't find the file sections: %s"),
376 scratch_pathname, bfd_errmsg (bfd_get_error ()));
379 exec_bfd_mtime = bfd_get_mtime (exec_bfd);
383 set_gdbarch_from_file (exec_bfd);
385 /* Add the executable's sections to the current address spaces'
386 list of sections. This possibly pushes the exec_ops
388 add_target_sections (&exec_bfd, sections, sections_end);
391 /* Tell display code (if any) about the changed file name. */
392 if (deprecated_exec_file_display_hook)
393 (*deprecated_exec_file_display_hook) (filename);
396 do_cleanups (cleanups);
398 bfd_cache_close_all ();
399 observer_notify_executable_changed ();
402 /* Process the first arg in ARGS as the new exec file.
404 Note that we have to explicitly ignore additional args, since we can
405 be called from file_command(), which also calls symbol_file_command()
406 which can take multiple args.
408 If ARGS is NULL, we just want to close the exec file. */
411 exec_file_command (char *args, int from_tty)
416 if (from_tty && target_has_execution
417 && !query (_("A program is being debugged already.\n"
418 "Are you sure you want to change the file? ")))
419 error (_("File not changed."));
423 struct cleanup *cleanups;
425 /* Scan through the args and pick up the first non option arg
428 argv = gdb_buildargv (args);
429 cleanups = make_cleanup_freeargv (argv);
431 for (; (*argv != NULL) && (**argv == '-'); argv++)
435 error (_("No executable file name was specified"));
437 filename = tilde_expand (*argv);
438 make_cleanup (xfree, filename);
439 exec_file_attach (filename, from_tty);
441 do_cleanups (cleanups);
444 exec_file_attach (NULL, from_tty);
447 /* Set both the exec file and the symbol file, in one command.
448 What a novelty. Why did GDB go through four major releases before this
449 command was added? */
452 file_command (char *arg, int from_tty)
454 /* FIXME, if we lose on reading the symbol file, we should revert
455 the exec file, but that's rough. */
456 exec_file_command (arg, from_tty);
457 symbol_file_command (arg, from_tty);
458 if (deprecated_file_changed_hook)
459 deprecated_file_changed_hook (arg);
463 /* Locate all mappable sections of a BFD file.
464 table_pp_char is a char * to get it through bfd_map_over_sections;
465 we cast it back to its proper type. */
468 add_to_section_table (bfd *abfd, struct bfd_section *asect,
471 struct target_section **table_pp = (struct target_section **) table_pp_char;
474 gdb_assert (abfd == asect->owner);
476 /* Check the section flags, but do not discard zero-length sections, since
477 some symbols may still be attached to this section. For instance, we
478 encountered on sparc-solaris 2.10 a shared library with an empty .bss
479 section to which a symbol named "_end" was attached. The address
480 of this symbol still needs to be relocated. */
481 aflag = bfd_get_section_flags (abfd, asect);
482 if (!(aflag & SEC_ALLOC))
485 (*table_pp)->owner = NULL;
486 (*table_pp)->the_bfd_section = asect;
487 (*table_pp)->addr = bfd_section_vma (abfd, asect);
488 (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
495 clear_section_table (struct target_section_table *table)
497 xfree (table->sections);
498 table->sections = table->sections_end = NULL;
501 /* Resize section table TABLE by ADJUSTMENT.
502 ADJUSTMENT may be negative, in which case the caller must have already
503 removed the sections being deleted.
504 Returns the old size. */
507 resize_section_table (struct target_section_table *table, int adjustment)
512 old_count = table->sections_end - table->sections;
514 new_count = adjustment + old_count;
518 table->sections = XRESIZEVEC (struct target_section, table->sections,
520 table->sections_end = table->sections + new_count;
523 clear_section_table (table);
528 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
529 Returns 0 if OK, 1 on error. */
532 build_section_table (struct bfd *some_bfd, struct target_section **start,
533 struct target_section **end)
537 count = bfd_count_sections (some_bfd);
540 *start = XNEWVEC (struct target_section, count);
542 bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
543 if (*end > *start + count)
544 internal_error (__FILE__, __LINE__,
545 _("failed internal consistency check"));
546 /* We could realloc the table, but it probably loses for most files. */
550 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
551 current set of target sections. */
554 add_target_sections (void *owner,
555 struct target_section *sections,
556 struct target_section *sections_end)
559 struct target_section_table *table = current_target_sections;
561 count = sections_end - sections;
565 int space = resize_section_table (table, count);
568 for (i = 0; i < count; ++i)
570 table->sections[space + i] = sections[i];
571 table->sections[space + i].owner = owner;
574 /* If these are the first file sections we can provide memory
575 from, push the file_stratum target. */
576 if (!target_is_pushed (&exec_ops))
577 push_target (&exec_ops);
581 /* Add the sections of OBJFILE to the current set of target sections. */
584 add_target_sections_of_objfile (struct objfile *objfile)
586 struct target_section_table *table = current_target_sections;
587 struct obj_section *osect;
590 struct target_section *ts;
595 /* Compute the number of sections to add. */
596 ALL_OBJFILE_OSECTIONS (objfile, osect)
598 if (bfd_get_section_size (osect->the_bfd_section) == 0)
606 space = resize_section_table (table, count);
608 ts = table->sections + space;
610 ALL_OBJFILE_OSECTIONS (objfile, osect)
612 if (bfd_get_section_size (osect->the_bfd_section) == 0)
615 gdb_assert (ts < table->sections + space + count);
617 ts->addr = obj_section_addr (osect);
618 ts->endaddr = obj_section_endaddr (osect);
619 ts->the_bfd_section = osect->the_bfd_section;
620 ts->owner = (void *) objfile;
626 /* Remove all target sections owned by OWNER.
627 OWNER must be the same value passed to add_target_sections. */
630 remove_target_sections (void *owner)
632 struct target_section *src, *dest;
633 struct target_section_table *table = current_target_sections;
635 gdb_assert (owner != NULL);
637 dest = table->sections;
638 for (src = table->sections; src < table->sections_end; src++)
639 if (src->owner != owner)
641 /* Keep this section. */
647 /* If we've dropped any sections, resize the section table. */
652 old_count = resize_section_table (table, dest - src);
654 /* If we don't have any more sections to read memory from,
655 remove the file_stratum target from the stack. */
656 if (old_count + (dest - src) == 0)
658 struct program_space *pspace;
661 if (pspace->target_sections.sections
662 != pspace->target_sections.sections_end)
665 unpush_target (&exec_ops);
672 enum target_xfer_status
673 exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset,
674 ULONGEST len, ULONGEST *xfered_len)
676 /* It's unduly pedantic to refuse to look at the executable for
677 read-only pieces; so do the equivalent of readonly regions aka
679 if (exec_bfd != NULL)
685 for (s = exec_bfd->sections; s; s = s->next)
687 if ((s->flags & SEC_LOAD) == 0
688 || (s->flags & SEC_READONLY) == 0)
692 size = bfd_get_section_size (s);
693 if (vma <= offset && offset < (vma + size))
697 amt = (vma + size) - offset;
701 amt = bfd_get_section_contents (exec_bfd, s,
702 readbuf, offset - vma, amt);
705 return TARGET_XFER_EOF;
709 return TARGET_XFER_OK;
715 /* Indicate failure to find the requested memory block. */
716 return TARGET_XFER_E_IO;
719 /* Appends all read-only memory ranges found in the target section
720 table defined by SECTIONS and SECTIONS_END, starting at (and
721 intersected with) MEMADDR for LEN bytes. Returns the augmented
724 static VEC(mem_range_s) *
725 section_table_available_memory (VEC(mem_range_s) *memory,
726 CORE_ADDR memaddr, ULONGEST len,
727 struct target_section *sections,
728 struct target_section *sections_end)
730 struct target_section *p;
732 for (p = sections; p < sections_end; p++)
734 if ((bfd_get_section_flags (p->the_bfd_section->owner,
736 & SEC_READONLY) == 0)
739 /* Copy the meta-data, adjusted. */
740 if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len))
742 ULONGEST lo1, hi1, lo2, hi2;
751 r = VEC_safe_push (mem_range_s, memory, NULL);
753 r->start = std::max (lo1, lo2);
754 r->length = std::min (hi1, hi2) - r->start;
761 enum target_xfer_status
762 section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset,
763 ULONGEST len, ULONGEST *xfered_len)
765 VEC(mem_range_s) *available_memory = NULL;
766 struct target_section_table *table;
767 struct cleanup *old_chain;
771 table = target_get_section_table (&exec_ops);
772 available_memory = section_table_available_memory (available_memory,
775 table->sections_end);
777 old_chain = make_cleanup (VEC_cleanup(mem_range_s),
780 normalize_mem_ranges (available_memory);
783 VEC_iterate (mem_range_s, available_memory, i, r);
786 if (mem_ranges_overlap (r->start, r->length, offset, len))
789 enum target_xfer_status status;
791 /* Get the intersection window. */
792 end = std::min<CORE_ADDR> (offset + len, r->start + r->length);
794 gdb_assert (end - offset <= len);
796 if (offset >= r->start)
797 status = exec_read_partial_read_only (readbuf, offset,
802 *xfered_len = r->start - offset;
803 status = TARGET_XFER_UNAVAILABLE;
805 do_cleanups (old_chain);
809 do_cleanups (old_chain);
812 return TARGET_XFER_UNAVAILABLE;
815 enum target_xfer_status
816 section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
817 ULONGEST offset, ULONGEST len,
818 ULONGEST *xfered_len,
819 struct target_section *sections,
820 struct target_section *sections_end,
821 const char *section_name)
824 struct target_section *p;
825 ULONGEST memaddr = offset;
826 ULONGEST memend = memaddr + len;
829 internal_error (__FILE__, __LINE__,
830 _("failed internal consistency check"));
832 for (p = sections; p < sections_end; p++)
834 struct bfd_section *asect = p->the_bfd_section;
835 bfd *abfd = asect->owner;
837 if (section_name && strcmp (section_name, asect->name) != 0)
838 continue; /* not the section we need. */
839 if (memaddr >= p->addr)
841 if (memend <= p->endaddr)
843 /* Entire transfer is within this section. */
845 res = bfd_set_section_contents (abfd, asect,
846 writebuf, memaddr - p->addr,
849 res = bfd_get_section_contents (abfd, asect,
850 readbuf, memaddr - p->addr,
856 return TARGET_XFER_OK;
859 return TARGET_XFER_EOF;
861 else if (memaddr >= p->endaddr)
863 /* This section ends before the transfer starts. */
868 /* This section overlaps the transfer. Just do half. */
869 len = p->endaddr - memaddr;
871 res = bfd_set_section_contents (abfd, asect,
872 writebuf, memaddr - p->addr,
875 res = bfd_get_section_contents (abfd, asect,
876 readbuf, memaddr - p->addr,
881 return TARGET_XFER_OK;
884 return TARGET_XFER_EOF;
889 return TARGET_XFER_EOF; /* We can't help. */
892 static struct target_section_table *
893 exec_get_section_table (struct target_ops *ops)
895 return current_target_sections;
898 static enum target_xfer_status
899 exec_xfer_partial (struct target_ops *ops, enum target_object object,
900 const char *annex, gdb_byte *readbuf,
901 const gdb_byte *writebuf,
902 ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
904 struct target_section_table *table = target_get_section_table (ops);
906 if (object == TARGET_OBJECT_MEMORY)
907 return section_table_xfer_memory_partial (readbuf, writebuf,
908 offset, len, xfered_len,
913 return TARGET_XFER_E_IO;
918 print_section_info (struct target_section_table *t, bfd *abfd)
920 struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
921 struct target_section *p;
922 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
923 int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16;
925 printf_filtered ("\t`%s', ", bfd_get_filename (abfd));
927 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd));
928 if (abfd == exec_bfd)
930 /* gcc-3.4 does not like the initialization in
931 <p == t->sections_end>. */
932 bfd_vma displacement = 0;
935 for (p = t->sections; p < t->sections_end; p++)
937 struct bfd_section *psect = p->the_bfd_section;
938 bfd *pbfd = psect->owner;
940 if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD))
941 != (SEC_ALLOC | SEC_LOAD))
944 if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address
945 && abfd->start_address < (bfd_get_section_vma (pbfd, psect)
946 + bfd_get_section_size (psect)))
948 displacement = p->addr - bfd_get_section_vma (pbfd, psect);
952 if (p == t->sections_end)
953 warning (_("Cannot find section for the entry point of %s."),
954 bfd_get_filename (abfd));
956 entry_point = gdbarch_addr_bits_remove (gdbarch,
957 bfd_get_start_address (abfd)
959 printf_filtered (_("\tEntry point: %s\n"),
960 paddress (gdbarch, entry_point));
962 for (p = t->sections; p < t->sections_end; p++)
964 struct bfd_section *psect = p->the_bfd_section;
965 bfd *pbfd = psect->owner;
967 printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
968 printf_filtered (" - %s", hex_string_custom (p->endaddr, wid));
970 /* FIXME: A format of "08l" is not wide enough for file offsets
971 larger than 4GB. OTOH, making it "016l" isn't desirable either
972 since most output will then be much wider than necessary. It
973 may make sense to test the size of the file and choose the
974 format string accordingly. */
975 /* FIXME: i18n: Need to rewrite this sentence. */
977 printf_filtered (" @ %s",
978 hex_string_custom (psect->filepos, 8));
979 printf_filtered (" is %s", bfd_section_name (pbfd, psect));
981 printf_filtered (" in %s", bfd_get_filename (pbfd));
982 printf_filtered ("\n");
987 exec_files_info (struct target_ops *t)
990 print_section_info (current_target_sections, exec_bfd);
992 puts_filtered (_("\t<no file loaded>\n"));
996 set_section_command (char *args, int from_tty)
998 struct target_section *p;
1001 unsigned long secaddr;
1004 struct target_section_table *table;
1007 error (_("Must specify section name and its virtual address"));
1009 /* Parse out section name. */
1010 for (secname = args; !isspace (*args); args++);
1011 seclen = args - secname;
1013 /* Parse out new virtual address. */
1014 secaddr = parse_and_eval_address (args);
1016 table = current_target_sections;
1017 for (p = table->sections; p < table->sections_end; p++)
1019 if (!strncmp (secname, bfd_section_name (p->bfd,
1020 p->the_bfd_section), seclen)
1021 && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0')
1023 offset = secaddr - p->addr;
1025 p->endaddr += offset;
1027 exec_files_info (&exec_ops);
1031 if (seclen >= sizeof (secprint))
1032 seclen = sizeof (secprint) - 1;
1033 strncpy (secprint, secname, seclen);
1034 secprint[seclen] = '\0';
1035 error (_("Section %s not found"), secprint);
1038 /* If we can find a section in FILENAME with BFD index INDEX, adjust
1042 exec_set_section_address (const char *filename, int index, CORE_ADDR address)
1044 struct target_section *p;
1045 struct target_section_table *table;
1047 table = current_target_sections;
1048 for (p = table->sections; p < table->sections_end; p++)
1050 if (filename_cmp (filename, p->the_bfd_section->owner->filename) == 0
1051 && index == p->the_bfd_section->index)
1053 p->endaddr += address - p->addr;
1059 /* If mourn is being called in all the right places, this could be say
1060 `gdb internal error' (since generic_mourn calls
1061 breakpoint_init_inferior). */
1064 ignore (struct target_ops *ops, struct gdbarch *gdbarch,
1065 struct bp_target_info *bp_tgt)
1070 /* Implement the to_remove_breakpoint method. */
1073 exec_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
1074 struct bp_target_info *bp_tgt,
1075 enum remove_bp_reason reason)
1081 exec_has_memory (struct target_ops *ops)
1083 /* We can provide memory if we have any file/target sections to read
1085 return (current_target_sections->sections
1086 != current_target_sections->sections_end);
1090 exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size)
1092 error (_("Can't create a corefile"));
1095 /* Fill in the exec file target vector. Very few entries need to be
1099 init_exec_ops (void)
1101 exec_ops.to_shortname = "exec";
1102 exec_ops.to_longname = "Local exec file";
1103 exec_ops.to_doc = "Use an executable file as a target.\n\
1104 Specify the filename of the executable file.";
1105 exec_ops.to_open = exec_open;
1106 exec_ops.to_close = exec_close_1;
1107 exec_ops.to_xfer_partial = exec_xfer_partial;
1108 exec_ops.to_get_section_table = exec_get_section_table;
1109 exec_ops.to_files_info = exec_files_info;
1110 exec_ops.to_insert_breakpoint = ignore;
1111 exec_ops.to_remove_breakpoint = exec_remove_breakpoint;
1112 exec_ops.to_stratum = file_stratum;
1113 exec_ops.to_has_memory = exec_has_memory;
1114 exec_ops.to_make_corefile_notes = exec_make_note_section;
1115 exec_ops.to_find_memory_regions = objfile_find_memory_regions;
1116 exec_ops.to_magic = OPS_MAGIC;
1120 _initialize_exec (void)
1122 struct cmd_list_element *c;
1128 c = add_cmd ("file", class_files, file_command, _("\
1129 Use FILE as program to be debugged.\n\
1130 It is read for its symbols, for getting the contents of pure memory,\n\
1131 and it is the program executed when you use the `run' command.\n\
1132 If FILE cannot be found as specified, your execution directory path\n\
1133 ($PATH) is searched for a command of that name.\n\
1134 No arg means to have no executable file and no symbols."), &cmdlist);
1135 set_cmd_completer (c, filename_completer);
1138 c = add_cmd ("exec-file", class_files, exec_file_command, _("\
1139 Use FILE as program for getting contents of pure memory.\n\
1140 If FILE cannot be found as specified, your execution directory path\n\
1141 is searched for a command of that name.\n\
1142 No arg means have no executable file."), &cmdlist);
1143 set_cmd_completer (c, filename_completer);
1145 add_com ("section", class_files, set_section_command, _("\
1146 Change the base address of section SECTION of the exec file to ADDR.\n\
1147 This can be used if the exec file does not contain section addresses,\n\
1148 (such as in the a.out format), or when the addresses specified in the\n\
1149 file itself are wrong. Each section must be changed separately. The\n\
1150 ``info files'' command lists all the sections and their addresses."));
1152 add_setshow_boolean_cmd ("write", class_support, &write_files, _("\
1153 Set writing into executable and core files."), _("\
1154 Show writing into executable and core files."), NULL,
1157 &setlist, &showlist);
1159 add_target_with_completer (&exec_ops, filename_completer);