1 /* Work with executable files, for GDB.
3 Copyright (C) 1988-2015 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"
47 void (*deprecated_file_changed_hook
) (char *);
49 /* Prototypes for local functions */
51 static void file_command (char *, int);
53 static void set_section_command (char *, int);
55 static void exec_files_info (struct target_ops
*);
57 static void init_exec_ops (void);
59 void _initialize_exec (void);
61 /* The target vector for executable files. */
63 static struct target_ops exec_ops
;
65 /* Whether to open exec and core files read-only or read-write. */
69 show_write_files (struct ui_file
*file
, int from_tty
,
70 struct cmd_list_element
*c
, const char *value
)
72 fprintf_filtered (file
, _("Writing into executable and core files is %s.\n"),
78 exec_open (const char *args
, int from_tty
)
80 target_preopen (from_tty
);
81 exec_file_attach (args
, from_tty
);
84 /* Close and clear exec_bfd. If we end up with no target sections to
85 read memory from, this unpushes the exec_ops target. */
96 /* Removing target sections may close the exec_ops target.
97 Clear exec_bfd before doing so to prevent recursion. */
101 remove_target_sections (&exec_bfd
);
103 xfree (exec_filename
);
104 exec_filename
= NULL
;
108 /* This is the target_close implementation. Clears all target
109 sections and closes all executable bfds from all program spaces. */
112 exec_close_1 (struct target_ops
*self
)
114 struct program_space
*ss
;
115 struct cleanup
*old_chain
;
117 old_chain
= save_current_program_space ();
120 set_current_program_space (ss
);
121 clear_section_table (current_target_sections
);
125 do_cleanups (old_chain
);
129 exec_file_clear (int from_tty
)
131 /* Remove exec file. */
135 printf_unfiltered (_("No executable file now.\n"));
141 exec_file_locate_attach (int pid
, int from_tty
)
143 char *exec_file
, *full_exec_path
= NULL
;
145 /* Do nothing if we already have an executable filename. */
146 exec_file
= (char *) get_exec_file (0);
147 if (exec_file
!= NULL
)
150 /* Try to determine a filename from the process itself. */
151 exec_file
= target_pid_to_exec_file (pid
);
152 if (exec_file
== NULL
)
155 /* If gdb_sysroot is not empty and the discovered filename
156 is absolute then prefix the filename with gdb_sysroot. */
157 if (gdb_sysroot
!= NULL
&& *gdb_sysroot
!= '\0'
158 && IS_ABSOLUTE_PATH (exec_file
))
159 full_exec_path
= exec_file_find (exec_file
, NULL
);
161 if (full_exec_path
== NULL
)
163 /* It's possible we don't have a full path, but rather just a
164 filename. Some targets, such as HP-UX, don't provide the
167 Attempt to qualify the filename against the source path.
168 (If that fails, we'll just fall back on the original
169 filename. Not much more we can do...) */
170 if (!source_full_path_of (exec_file
, &full_exec_path
))
171 full_exec_path
= xstrdup (exec_file
);
174 exec_file_attach (full_exec_path
, from_tty
);
175 symbol_file_add_main (full_exec_path
, from_tty
);
178 /* Set FILENAME as the new exec file.
180 This function is intended to be behave essentially the same
181 as exec_file_command, except that the latter will detect when
182 a target is being debugged, and will ask the user whether it
183 should be shut down first. (If the answer is "no", then the
184 new file is ignored.)
186 This file is used by exec_file_command, to do the work of opening
187 and processing the exec file after any prompting has happened.
189 And, it is used by child_attach, when the attach command was
190 given a pid but not a exec pathname, and the attach command could
191 figure out the pathname from the pid. (In this case, we shouldn't
192 ask the user whether the current target should be shut down --
193 we're supplying the exec pathname late for good reason.) */
196 exec_file_attach (const char *filename
, int from_tty
)
198 struct cleanup
*cleanups
;
200 /* First, acquire a reference to the current exec_bfd. We release
201 this at the end of the function; but acquiring it now lets the
202 BFD cache return it if this call refers to the same file. */
203 gdb_bfd_ref (exec_bfd
);
204 cleanups
= make_cleanup_bfd_unref (exec_bfd
);
206 /* Remove any previous exec file. */
209 /* Now open and digest the file the user requested, if any. */
214 printf_unfiltered (_("No executable file now.\n"));
216 set_gdbarch_from_file (NULL
);
220 int load_via_target
= 0;
221 char *scratch_pathname
, *canonical_pathname
;
223 struct target_section
*sections
= NULL
, *sections_end
= NULL
;
226 if (is_target_filename (filename
))
228 if (target_filesystem_is_local ())
229 filename
+= strlen (TARGET_SYSROOT_PREFIX
);
236 /* gdb_bfd_fopen does not support "target:" filenames. */
238 warning (_("writing into executable files is "
239 "not supported for %s sysroots"),
240 TARGET_SYSROOT_PREFIX
);
242 scratch_pathname
= xstrdup (filename
);
243 make_cleanup (xfree
, scratch_pathname
);
247 canonical_pathname
= scratch_pathname
;
251 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
252 filename
, write_files
?
253 O_RDWR
| O_BINARY
: O_RDONLY
| O_BINARY
,
255 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
256 if (scratch_chan
< 0)
258 char *exename
= alloca (strlen (filename
) + 5);
260 strcat (strcpy (exename
, filename
), ".exe");
261 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
262 exename
, write_files
?
264 : O_RDONLY
| O_BINARY
,
268 if (scratch_chan
< 0)
269 perror_with_name (filename
);
271 make_cleanup (xfree
, scratch_pathname
);
273 /* gdb_bfd_open (and its variants) prefers canonicalized
274 pathname for better BFD caching. */
275 canonical_pathname
= gdb_realpath (scratch_pathname
);
276 make_cleanup (xfree
, canonical_pathname
);
279 if (write_files
&& !load_via_target
)
280 exec_bfd
= gdb_bfd_fopen (canonical_pathname
, gnutarget
,
281 FOPEN_RUB
, scratch_chan
);
283 exec_bfd
= gdb_bfd_open (canonical_pathname
, gnutarget
, scratch_chan
);
287 error (_("\"%s\": could not open as an executable file: %s"),
288 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
291 /* gdb_realpath_keepfile resolves symlinks on the local
292 filesystem and so cannot be used for "target:" files. */
293 gdb_assert (exec_filename
== NULL
);
295 exec_filename
= xstrdup (bfd_get_filename (exec_bfd
));
297 exec_filename
= gdb_realpath_keepfile (scratch_pathname
);
299 if (!bfd_check_format_matches (exec_bfd
, bfd_object
, &matching
))
301 /* Make sure to close exec_bfd, or else "run" might try to use
304 error (_("\"%s\": not in executable format: %s"),
306 gdb_bfd_errmsg (bfd_get_error (), matching
));
309 if (build_section_table (exec_bfd
, §ions
, §ions_end
))
311 /* Make sure to close exec_bfd, or else "run" might try to use
314 error (_("\"%s\": can't find the file sections: %s"),
315 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
318 exec_bfd_mtime
= bfd_get_mtime (exec_bfd
);
322 set_gdbarch_from_file (exec_bfd
);
324 /* Add the executable's sections to the current address spaces'
325 list of sections. This possibly pushes the exec_ops
327 add_target_sections (&exec_bfd
, sections
, sections_end
);
330 /* Tell display code (if any) about the changed file name. */
331 if (deprecated_exec_file_display_hook
)
332 (*deprecated_exec_file_display_hook
) (filename
);
335 do_cleanups (cleanups
);
337 bfd_cache_close_all ();
338 observer_notify_executable_changed ();
341 /* Process the first arg in ARGS as the new exec file.
343 Note that we have to explicitly ignore additional args, since we can
344 be called from file_command(), which also calls symbol_file_command()
345 which can take multiple args.
347 If ARGS is NULL, we just want to close the exec file. */
350 exec_file_command (char *args
, int from_tty
)
355 if (from_tty
&& target_has_execution
356 && !query (_("A program is being debugged already.\n"
357 "Are you sure you want to change the file? ")))
358 error (_("File not changed."));
362 struct cleanup
*cleanups
;
364 /* Scan through the args and pick up the first non option arg
367 argv
= gdb_buildargv (args
);
368 cleanups
= make_cleanup_freeargv (argv
);
370 for (; (*argv
!= NULL
) && (**argv
== '-'); argv
++)
374 error (_("No executable file name was specified"));
376 filename
= tilde_expand (*argv
);
377 make_cleanup (xfree
, filename
);
378 exec_file_attach (filename
, from_tty
);
380 do_cleanups (cleanups
);
383 exec_file_attach (NULL
, from_tty
);
386 /* Set both the exec file and the symbol file, in one command.
387 What a novelty. Why did GDB go through four major releases before this
388 command was added? */
391 file_command (char *arg
, int from_tty
)
393 /* FIXME, if we lose on reading the symbol file, we should revert
394 the exec file, but that's rough. */
395 exec_file_command (arg
, from_tty
);
396 symbol_file_command (arg
, from_tty
);
397 if (deprecated_file_changed_hook
)
398 deprecated_file_changed_hook (arg
);
402 /* Locate all mappable sections of a BFD file.
403 table_pp_char is a char * to get it through bfd_map_over_sections;
404 we cast it back to its proper type. */
407 add_to_section_table (bfd
*abfd
, struct bfd_section
*asect
,
410 struct target_section
**table_pp
= (struct target_section
**) table_pp_char
;
413 gdb_assert (abfd
== asect
->owner
);
415 /* Check the section flags, but do not discard zero-length sections, since
416 some symbols may still be attached to this section. For instance, we
417 encountered on sparc-solaris 2.10 a shared library with an empty .bss
418 section to which a symbol named "_end" was attached. The address
419 of this symbol still needs to be relocated. */
420 aflag
= bfd_get_section_flags (abfd
, asect
);
421 if (!(aflag
& SEC_ALLOC
))
424 (*table_pp
)->owner
= NULL
;
425 (*table_pp
)->the_bfd_section
= asect
;
426 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
427 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
434 clear_section_table (struct target_section_table
*table
)
436 xfree (table
->sections
);
437 table
->sections
= table
->sections_end
= NULL
;
440 /* Resize section table TABLE by ADJUSTMENT.
441 ADJUSTMENT may be negative, in which case the caller must have already
442 removed the sections being deleted.
443 Returns the old size. */
446 resize_section_table (struct target_section_table
*table
, int adjustment
)
451 old_count
= table
->sections_end
- table
->sections
;
453 new_count
= adjustment
+ old_count
;
457 table
->sections
= xrealloc (table
->sections
,
458 sizeof (struct target_section
) * new_count
);
459 table
->sections_end
= table
->sections
+ new_count
;
462 clear_section_table (table
);
467 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
468 Returns 0 if OK, 1 on error. */
471 build_section_table (struct bfd
*some_bfd
, struct target_section
**start
,
472 struct target_section
**end
)
476 count
= bfd_count_sections (some_bfd
);
479 *start
= (struct target_section
*) xmalloc (count
* sizeof (**start
));
481 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *) end
);
482 if (*end
> *start
+ count
)
483 internal_error (__FILE__
, __LINE__
,
484 _("failed internal consistency check"));
485 /* We could realloc the table, but it probably loses for most files. */
489 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
490 current set of target sections. */
493 add_target_sections (void *owner
,
494 struct target_section
*sections
,
495 struct target_section
*sections_end
)
498 struct target_section_table
*table
= current_target_sections
;
500 count
= sections_end
- sections
;
504 int space
= resize_section_table (table
, count
);
507 for (i
= 0; i
< count
; ++i
)
509 table
->sections
[space
+ i
] = sections
[i
];
510 table
->sections
[space
+ i
].owner
= owner
;
513 /* If these are the first file sections we can provide memory
514 from, push the file_stratum target. */
515 if (!target_is_pushed (&exec_ops
))
516 push_target (&exec_ops
);
520 /* Add the sections of OBJFILE to the current set of target sections. */
523 add_target_sections_of_objfile (struct objfile
*objfile
)
525 struct target_section_table
*table
= current_target_sections
;
526 struct obj_section
*osect
;
529 struct target_section
*ts
;
534 /* Compute the number of sections to add. */
535 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
537 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
545 space
= resize_section_table (table
, count
);
547 ts
= table
->sections
+ space
;
549 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
551 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
554 gdb_assert (ts
< table
->sections
+ space
+ count
);
556 ts
->addr
= obj_section_addr (osect
);
557 ts
->endaddr
= obj_section_endaddr (osect
);
558 ts
->the_bfd_section
= osect
->the_bfd_section
;
559 ts
->owner
= (void *) objfile
;
565 /* Remove all target sections owned by OWNER.
566 OWNER must be the same value passed to add_target_sections. */
569 remove_target_sections (void *owner
)
571 struct target_section
*src
, *dest
;
572 struct target_section_table
*table
= current_target_sections
;
574 gdb_assert (owner
!= NULL
);
576 dest
= table
->sections
;
577 for (src
= table
->sections
; src
< table
->sections_end
; src
++)
578 if (src
->owner
!= owner
)
580 /* Keep this section. */
586 /* If we've dropped any sections, resize the section table. */
591 old_count
= resize_section_table (table
, dest
- src
);
593 /* If we don't have any more sections to read memory from,
594 remove the file_stratum target from the stack. */
595 if (old_count
+ (dest
- src
) == 0)
597 struct program_space
*pspace
;
600 if (pspace
->target_sections
.sections
601 != pspace
->target_sections
.sections_end
)
604 unpush_target (&exec_ops
);
611 enum target_xfer_status
612 exec_read_partial_read_only (gdb_byte
*readbuf
, ULONGEST offset
,
613 ULONGEST len
, ULONGEST
*xfered_len
)
615 /* It's unduly pedantic to refuse to look at the executable for
616 read-only pieces; so do the equivalent of readonly regions aka
618 if (exec_bfd
!= NULL
)
624 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
626 if ((s
->flags
& SEC_LOAD
) == 0
627 || (s
->flags
& SEC_READONLY
) == 0)
631 size
= bfd_get_section_size (s
);
632 if (vma
<= offset
&& offset
< (vma
+ size
))
636 amt
= (vma
+ size
) - offset
;
640 amt
= bfd_get_section_contents (exec_bfd
, s
,
641 readbuf
, offset
- vma
, amt
);
644 return TARGET_XFER_EOF
;
648 return TARGET_XFER_OK
;
654 /* Indicate failure to find the requested memory block. */
655 return TARGET_XFER_E_IO
;
658 /* Appends all read-only memory ranges found in the target section
659 table defined by SECTIONS and SECTIONS_END, starting at (and
660 intersected with) MEMADDR for LEN bytes. Returns the augmented
663 static VEC(mem_range_s
) *
664 section_table_available_memory (VEC(mem_range_s
) *memory
,
665 CORE_ADDR memaddr
, ULONGEST len
,
666 struct target_section
*sections
,
667 struct target_section
*sections_end
)
669 struct target_section
*p
;
671 for (p
= sections
; p
< sections_end
; p
++)
673 if ((bfd_get_section_flags (p
->the_bfd_section
->owner
,
675 & SEC_READONLY
) == 0)
678 /* Copy the meta-data, adjusted. */
679 if (mem_ranges_overlap (p
->addr
, p
->endaddr
- p
->addr
, memaddr
, len
))
681 ULONGEST lo1
, hi1
, lo2
, hi2
;
690 r
= VEC_safe_push (mem_range_s
, memory
, NULL
);
692 r
->start
= max (lo1
, lo2
);
693 r
->length
= min (hi1
, hi2
) - r
->start
;
700 enum target_xfer_status
701 section_table_read_available_memory (gdb_byte
*readbuf
, ULONGEST offset
,
702 ULONGEST len
, ULONGEST
*xfered_len
)
704 VEC(mem_range_s
) *available_memory
= NULL
;
705 struct target_section_table
*table
;
706 struct cleanup
*old_chain
;
710 table
= target_get_section_table (&exec_ops
);
711 available_memory
= section_table_available_memory (available_memory
,
714 table
->sections_end
);
716 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
),
719 normalize_mem_ranges (available_memory
);
722 VEC_iterate (mem_range_s
, available_memory
, i
, r
);
725 if (mem_ranges_overlap (r
->start
, r
->length
, offset
, len
))
728 enum target_xfer_status status
;
730 /* Get the intersection window. */
731 end
= min (offset
+ len
, r
->start
+ r
->length
);
733 gdb_assert (end
- offset
<= len
);
735 if (offset
>= r
->start
)
736 status
= exec_read_partial_read_only (readbuf
, offset
,
741 *xfered_len
= r
->start
- offset
;
742 status
= TARGET_XFER_UNAVAILABLE
;
744 do_cleanups (old_chain
);
748 do_cleanups (old_chain
);
751 return TARGET_XFER_UNAVAILABLE
;
754 enum target_xfer_status
755 section_table_xfer_memory_partial (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
756 ULONGEST offset
, ULONGEST len
,
757 ULONGEST
*xfered_len
,
758 struct target_section
*sections
,
759 struct target_section
*sections_end
,
760 const char *section_name
)
763 struct target_section
*p
;
764 ULONGEST memaddr
= offset
;
765 ULONGEST memend
= memaddr
+ len
;
768 internal_error (__FILE__
, __LINE__
,
769 _("failed internal consistency check"));
771 for (p
= sections
; p
< sections_end
; p
++)
773 struct bfd_section
*asect
= p
->the_bfd_section
;
774 bfd
*abfd
= asect
->owner
;
776 if (section_name
&& strcmp (section_name
, asect
->name
) != 0)
777 continue; /* not the section we need. */
778 if (memaddr
>= p
->addr
)
780 if (memend
<= p
->endaddr
)
782 /* Entire transfer is within this section. */
784 res
= bfd_set_section_contents (abfd
, asect
,
785 writebuf
, memaddr
- p
->addr
,
788 res
= bfd_get_section_contents (abfd
, asect
,
789 readbuf
, memaddr
- p
->addr
,
795 return TARGET_XFER_OK
;
798 return TARGET_XFER_EOF
;
800 else if (memaddr
>= p
->endaddr
)
802 /* This section ends before the transfer starts. */
807 /* This section overlaps the transfer. Just do half. */
808 len
= p
->endaddr
- memaddr
;
810 res
= bfd_set_section_contents (abfd
, asect
,
811 writebuf
, memaddr
- p
->addr
,
814 res
= bfd_get_section_contents (abfd
, asect
,
815 readbuf
, memaddr
- p
->addr
,
820 return TARGET_XFER_OK
;
823 return TARGET_XFER_EOF
;
828 return TARGET_XFER_EOF
; /* We can't help. */
831 static struct target_section_table
*
832 exec_get_section_table (struct target_ops
*ops
)
834 return current_target_sections
;
837 static enum target_xfer_status
838 exec_xfer_partial (struct target_ops
*ops
, enum target_object object
,
839 const char *annex
, gdb_byte
*readbuf
,
840 const gdb_byte
*writebuf
,
841 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
843 struct target_section_table
*table
= target_get_section_table (ops
);
845 if (object
== TARGET_OBJECT_MEMORY
)
846 return section_table_xfer_memory_partial (readbuf
, writebuf
,
847 offset
, len
, xfered_len
,
852 return TARGET_XFER_E_IO
;
857 print_section_info (struct target_section_table
*t
, bfd
*abfd
)
859 struct gdbarch
*gdbarch
= gdbarch_from_bfd (abfd
);
860 struct target_section
*p
;
861 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
862 int wid
= gdbarch_addr_bit (gdbarch
) <= 32 ? 8 : 16;
864 printf_filtered ("\t`%s', ", bfd_get_filename (abfd
));
866 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd
));
867 if (abfd
== exec_bfd
)
869 /* gcc-3.4 does not like the initialization in
870 <p == t->sections_end>. */
871 bfd_vma displacement
= 0;
874 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
876 struct bfd_section
*psect
= p
->the_bfd_section
;
877 bfd
*pbfd
= psect
->owner
;
879 if ((bfd_get_section_flags (pbfd
, psect
) & (SEC_ALLOC
| SEC_LOAD
))
880 != (SEC_ALLOC
| SEC_LOAD
))
883 if (bfd_get_section_vma (pbfd
, psect
) <= abfd
->start_address
884 && abfd
->start_address
< (bfd_get_section_vma (pbfd
, psect
)
885 + bfd_get_section_size (psect
)))
887 displacement
= p
->addr
- bfd_get_section_vma (pbfd
, psect
);
891 if (p
== t
->sections_end
)
892 warning (_("Cannot find section for the entry point of %s."),
893 bfd_get_filename (abfd
));
895 entry_point
= gdbarch_addr_bits_remove (gdbarch
,
896 bfd_get_start_address (abfd
)
898 printf_filtered (_("\tEntry point: %s\n"),
899 paddress (gdbarch
, entry_point
));
901 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
903 struct bfd_section
*psect
= p
->the_bfd_section
;
904 bfd
*pbfd
= psect
->owner
;
906 printf_filtered ("\t%s", hex_string_custom (p
->addr
, wid
));
907 printf_filtered (" - %s", hex_string_custom (p
->endaddr
, wid
));
909 /* FIXME: A format of "08l" is not wide enough for file offsets
910 larger than 4GB. OTOH, making it "016l" isn't desirable either
911 since most output will then be much wider than necessary. It
912 may make sense to test the size of the file and choose the
913 format string accordingly. */
914 /* FIXME: i18n: Need to rewrite this sentence. */
916 printf_filtered (" @ %s",
917 hex_string_custom (psect
->filepos
, 8));
918 printf_filtered (" is %s", bfd_section_name (pbfd
, psect
));
920 printf_filtered (" in %s", bfd_get_filename (pbfd
));
921 printf_filtered ("\n");
926 exec_files_info (struct target_ops
*t
)
929 print_section_info (current_target_sections
, exec_bfd
);
931 puts_filtered (_("\t<no file loaded>\n"));
935 set_section_command (char *args
, int from_tty
)
937 struct target_section
*p
;
940 unsigned long secaddr
;
943 struct target_section_table
*table
;
946 error (_("Must specify section name and its virtual address"));
948 /* Parse out section name. */
949 for (secname
= args
; !isspace (*args
); args
++);
950 seclen
= args
- secname
;
952 /* Parse out new virtual address. */
953 secaddr
= parse_and_eval_address (args
);
955 table
= current_target_sections
;
956 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
958 if (!strncmp (secname
, bfd_section_name (p
->bfd
,
959 p
->the_bfd_section
), seclen
)
960 && bfd_section_name (p
->bfd
, p
->the_bfd_section
)[seclen
] == '\0')
962 offset
= secaddr
- p
->addr
;
964 p
->endaddr
+= offset
;
966 exec_files_info (&exec_ops
);
970 if (seclen
>= sizeof (secprint
))
971 seclen
= sizeof (secprint
) - 1;
972 strncpy (secprint
, secname
, seclen
);
973 secprint
[seclen
] = '\0';
974 error (_("Section %s not found"), secprint
);
977 /* If we can find a section in FILENAME with BFD index INDEX, adjust
981 exec_set_section_address (const char *filename
, int index
, CORE_ADDR address
)
983 struct target_section
*p
;
984 struct target_section_table
*table
;
986 table
= current_target_sections
;
987 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
989 if (filename_cmp (filename
, p
->the_bfd_section
->owner
->filename
) == 0
990 && index
== p
->the_bfd_section
->index
)
992 p
->endaddr
+= address
- p
->addr
;
998 /* If mourn is being called in all the right places, this could be say
999 `gdb internal error' (since generic_mourn calls
1000 breakpoint_init_inferior). */
1003 ignore (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1004 struct bp_target_info
*bp_tgt
)
1010 exec_has_memory (struct target_ops
*ops
)
1012 /* We can provide memory if we have any file/target sections to read
1014 return (current_target_sections
->sections
1015 != current_target_sections
->sections_end
);
1019 exec_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
1021 error (_("Can't create a corefile"));
1024 /* Fill in the exec file target vector. Very few entries need to be
1028 init_exec_ops (void)
1030 exec_ops
.to_shortname
= "exec";
1031 exec_ops
.to_longname
= "Local exec file";
1032 exec_ops
.to_doc
= "Use an executable file as a target.\n\
1033 Specify the filename of the executable file.";
1034 exec_ops
.to_open
= exec_open
;
1035 exec_ops
.to_close
= exec_close_1
;
1036 exec_ops
.to_xfer_partial
= exec_xfer_partial
;
1037 exec_ops
.to_get_section_table
= exec_get_section_table
;
1038 exec_ops
.to_files_info
= exec_files_info
;
1039 exec_ops
.to_insert_breakpoint
= ignore
;
1040 exec_ops
.to_remove_breakpoint
= ignore
;
1041 exec_ops
.to_stratum
= file_stratum
;
1042 exec_ops
.to_has_memory
= exec_has_memory
;
1043 exec_ops
.to_make_corefile_notes
= exec_make_note_section
;
1044 exec_ops
.to_find_memory_regions
= objfile_find_memory_regions
;
1045 exec_ops
.to_magic
= OPS_MAGIC
;
1049 _initialize_exec (void)
1051 struct cmd_list_element
*c
;
1057 c
= add_cmd ("file", class_files
, file_command
, _("\
1058 Use FILE as program to be debugged.\n\
1059 It is read for its symbols, for getting the contents of pure memory,\n\
1060 and it is the program executed when you use the `run' command.\n\
1061 If FILE cannot be found as specified, your execution directory path\n\
1062 ($PATH) is searched for a command of that name.\n\
1063 No arg means to have no executable file and no symbols."), &cmdlist
);
1064 set_cmd_completer (c
, filename_completer
);
1067 c
= add_cmd ("exec-file", class_files
, exec_file_command
, _("\
1068 Use FILE as program for getting contents of pure memory.\n\
1069 If FILE cannot be found as specified, your execution directory path\n\
1070 is searched for a command of that name.\n\
1071 No arg means have no executable file."), &cmdlist
);
1072 set_cmd_completer (c
, filename_completer
);
1074 add_com ("section", class_files
, set_section_command
, _("\
1075 Change the base address of section SECTION of the exec file to ADDR.\n\
1076 This can be used if the exec file does not contain section addresses,\n\
1077 (such as in the a.out format), or when the addresses specified in the\n\
1078 file itself are wrong. Each section must be changed separately. The\n\
1079 ``info files'' command lists all the sections and their addresses."));
1081 add_setshow_boolean_cmd ("write", class_support
, &write_files
, _("\
1082 Set writing into executable and core files."), _("\
1083 Show writing into executable and core files."), NULL
,
1086 &setlist
, &showlist
);
1088 add_target_with_completer (&exec_ops
, filename_completer
);