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
) (const char *);
50 /* Prototypes for local functions */
52 static void set_section_command (char *, int);
54 static void exec_files_info (struct target_ops
*);
56 static void init_exec_ops (void);
58 /* The target vector for executable files. */
60 static struct target_ops exec_ops
;
62 /* Whether to open exec and core files read-only or read-write. */
66 show_write_files (struct ui_file
*file
, int from_tty
,
67 struct cmd_list_element
*c
, const char *value
)
69 fprintf_filtered (file
, _("Writing into executable and core files is %s.\n"),
75 exec_open (const char *args
, int from_tty
)
77 target_preopen (from_tty
);
78 exec_file_attach (args
, from_tty
);
81 /* Close and clear exec_bfd. If we end up with no target sections to
82 read memory from, this unpushes the exec_ops target. */
93 /* Removing target sections may close the exec_ops target.
94 Clear exec_bfd before doing so to prevent recursion. */
98 remove_target_sections (&exec_bfd
);
100 xfree (exec_filename
);
101 exec_filename
= NULL
;
105 /* This is the target_close implementation. Clears all target
106 sections and closes all executable bfds from all program spaces. */
109 exec_close_1 (struct target_ops
*self
)
111 struct program_space
*ss
;
112 scoped_restore_current_program_space restore_pspace
;
116 set_current_program_space (ss
);
117 clear_section_table (current_target_sections
);
123 exec_file_clear (int from_tty
)
125 /* Remove exec file. */
129 printf_unfiltered (_("No executable file now.\n"));
135 try_open_exec_file (const char *exec_file_host
, struct inferior
*inf
,
136 symfile_add_flags add_flags
)
138 struct cleanup
*old_chain
;
139 struct gdb_exception prev_err
= exception_none
;
141 old_chain
= make_cleanup (free_current_contents
, &prev_err
.message
);
143 /* exec_file_attach and symbol_file_add_main may throw an error if the file
144 cannot be opened either locally or remotely.
146 This happens for example, when the file is first found in the local
147 sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
148 exist in the target filesystem, or when the file does exist, but
151 Even without a symbol file, the remote-based debugging session should
152 continue normally instead of ending abruptly. Hence we catch thrown
153 errors/exceptions in the following code. */
156 /* We must do this step even if exec_file_host is NULL, so that
157 exec_file_attach will clear state. */
158 exec_file_attach (exec_file_host
, add_flags
& SYMFILE_VERBOSE
);
160 CATCH (err
, RETURN_MASK_ERROR
)
162 if (err
.message
!= NULL
)
163 warning ("%s", err
.message
);
167 /* Save message so it doesn't get trashed by the catch below. */
168 if (err
.message
!= NULL
)
169 prev_err
.message
= xstrdup (err
.message
);
173 if (exec_file_host
!= NULL
)
177 symbol_file_add_main (exec_file_host
, add_flags
);
179 CATCH (err
, RETURN_MASK_ERROR
)
181 if (!exception_print_same (prev_err
, err
))
182 warning ("%s", err
.message
);
187 do_cleanups (old_chain
);
193 exec_file_locate_attach (int pid
, int defer_bp_reset
, int from_tty
)
195 char *exec_file_target
, *exec_file_host
;
196 struct cleanup
*old_chain
;
197 symfile_add_flags add_flags
= 0;
199 /* Do nothing if we already have an executable filename. */
200 if (get_exec_file (0) != NULL
)
203 /* Try to determine a filename from the process itself. */
204 exec_file_target
= target_pid_to_exec_file (pid
);
205 if (exec_file_target
== NULL
)
207 warning (_("No executable has been specified and target does not "
209 "determining executable automatically. "
210 "Try using the \"file\" command."));
214 exec_file_host
= exec_file_find (exec_file_target
, NULL
);
215 old_chain
= make_cleanup (xfree
, exec_file_host
);
218 add_flags
|= SYMFILE_DEFER_BP_RESET
;
221 add_flags
|= SYMFILE_VERBOSE
;
223 /* Attempt to open the exec file. */
224 try_open_exec_file (exec_file_host
, current_inferior (), add_flags
);
225 do_cleanups (old_chain
);
228 /* Set FILENAME as the new exec file.
230 This function is intended to be behave essentially the same
231 as exec_file_command, except that the latter will detect when
232 a target is being debugged, and will ask the user whether it
233 should be shut down first. (If the answer is "no", then the
234 new file is ignored.)
236 This file is used by exec_file_command, to do the work of opening
237 and processing the exec file after any prompting has happened.
239 And, it is used by child_attach, when the attach command was
240 given a pid but not a exec pathname, and the attach command could
241 figure out the pathname from the pid. (In this case, we shouldn't
242 ask the user whether the current target should be shut down --
243 we're supplying the exec pathname late for good reason.) */
246 exec_file_attach (const char *filename
, int from_tty
)
248 /* First, acquire a reference to the current exec_bfd. We release
249 this at the end of the function; but acquiring it now lets the
250 BFD cache return it if this call refers to the same file. */
251 gdb_bfd_ref (exec_bfd
);
252 gdb_bfd_ref_ptr
exec_bfd_holder (exec_bfd
);
254 /* Remove any previous exec file. */
257 /* Now open and digest the file the user requested, if any. */
262 printf_unfiltered (_("No executable file now.\n"));
264 set_gdbarch_from_file (NULL
);
268 int load_via_target
= 0;
269 const char *scratch_pathname
, *canonical_pathname
;
271 struct target_section
*sections
= NULL
, *sections_end
= NULL
;
274 if (is_target_filename (filename
))
276 if (target_filesystem_is_local ())
277 filename
+= strlen (TARGET_SYSROOT_PREFIX
);
282 gdb::unique_xmalloc_ptr
<char> canonical_storage
, scratch_storage
;
285 /* gdb_bfd_fopen does not support "target:" filenames. */
287 warning (_("writing into executable files is "
288 "not supported for %s sysroots"),
289 TARGET_SYSROOT_PREFIX
);
291 scratch_pathname
= filename
;
293 canonical_pathname
= scratch_pathname
;
299 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
300 filename
, write_files
?
301 O_RDWR
| O_BINARY
: O_RDONLY
| O_BINARY
,
303 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
304 if (scratch_chan
< 0)
306 char *exename
= (char *) alloca (strlen (filename
) + 5);
308 strcat (strcpy (exename
, filename
), ".exe");
309 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
310 exename
, write_files
?
312 : O_RDONLY
| O_BINARY
,
316 if (scratch_chan
< 0)
317 perror_with_name (filename
);
319 scratch_storage
.reset (temp_pathname
);
320 scratch_pathname
= temp_pathname
;
322 /* gdb_bfd_open (and its variants) prefers canonicalized
323 pathname for better BFD caching. */
324 canonical_storage
= gdb_realpath (scratch_pathname
);
325 canonical_pathname
= canonical_storage
.get ();
328 gdb_bfd_ref_ptr temp
;
329 if (write_files
&& !load_via_target
)
330 temp
= gdb_bfd_fopen (canonical_pathname
, gnutarget
,
331 FOPEN_RUB
, scratch_chan
);
333 temp
= gdb_bfd_open (canonical_pathname
, gnutarget
, scratch_chan
);
334 exec_bfd
= temp
.release ();
338 error (_("\"%s\": could not open as an executable file: %s."),
339 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
342 /* gdb_realpath_keepfile resolves symlinks on the local
343 filesystem and so cannot be used for "target:" files. */
344 gdb_assert (exec_filename
== NULL
);
346 exec_filename
= xstrdup (bfd_get_filename (exec_bfd
));
348 exec_filename
= gdb_realpath_keepfile (scratch_pathname
).release ();
350 if (!bfd_check_format_matches (exec_bfd
, bfd_object
, &matching
))
352 /* Make sure to close exec_bfd, or else "run" might try to use
355 error (_("\"%s\": not in executable format: %s"),
357 gdb_bfd_errmsg (bfd_get_error (), matching
));
360 if (build_section_table (exec_bfd
, §ions
, §ions_end
))
362 /* Make sure to close exec_bfd, or else "run" might try to use
365 error (_("\"%s\": can't find the file sections: %s"),
366 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
369 exec_bfd_mtime
= bfd_get_mtime (exec_bfd
);
373 set_gdbarch_from_file (exec_bfd
);
375 /* Add the executable's sections to the current address spaces'
376 list of sections. This possibly pushes the exec_ops
378 add_target_sections (&exec_bfd
, sections
, sections_end
);
381 /* Tell display code (if any) about the changed file name. */
382 if (deprecated_exec_file_display_hook
)
383 (*deprecated_exec_file_display_hook
) (filename
);
386 bfd_cache_close_all ();
387 observer_notify_executable_changed ();
390 /* Process the first arg in ARGS as the new exec file.
392 Note that we have to explicitly ignore additional args, since we can
393 be called from file_command(), which also calls symbol_file_command()
394 which can take multiple args.
396 If ARGS is NULL, we just want to close the exec file. */
399 exec_file_command (const char *args
, int from_tty
)
403 if (from_tty
&& target_has_execution
404 && !query (_("A program is being debugged already.\n"
405 "Are you sure you want to change the file? ")))
406 error (_("File not changed."));
410 /* Scan through the args and pick up the first non option arg
413 gdb_argv
built_argv (args
);
414 char **argv
= built_argv
.get ();
416 for (; (*argv
!= NULL
) && (**argv
== '-'); argv
++)
420 error (_("No executable file name was specified"));
422 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (*argv
));
423 exec_file_attach (filename
.get (), from_tty
);
426 exec_file_attach (NULL
, from_tty
);
429 /* Set both the exec file and the symbol file, in one command.
430 What a novelty. Why did GDB go through four major releases before this
431 command was added? */
434 file_command (const char *arg
, int from_tty
)
436 /* FIXME, if we lose on reading the symbol file, we should revert
437 the exec file, but that's rough. */
438 exec_file_command (arg
, from_tty
);
439 symbol_file_command (arg
, from_tty
);
440 if (deprecated_file_changed_hook
)
441 deprecated_file_changed_hook (arg
);
445 /* Locate all mappable sections of a BFD file.
446 table_pp_char is a char * to get it through bfd_map_over_sections;
447 we cast it back to its proper type. */
450 add_to_section_table (bfd
*abfd
, struct bfd_section
*asect
,
453 struct target_section
**table_pp
= (struct target_section
**) table_pp_char
;
456 gdb_assert (abfd
== asect
->owner
);
458 /* Check the section flags, but do not discard zero-length sections, since
459 some symbols may still be attached to this section. For instance, we
460 encountered on sparc-solaris 2.10 a shared library with an empty .bss
461 section to which a symbol named "_end" was attached. The address
462 of this symbol still needs to be relocated. */
463 aflag
= bfd_get_section_flags (abfd
, asect
);
464 if (!(aflag
& SEC_ALLOC
))
467 (*table_pp
)->owner
= NULL
;
468 (*table_pp
)->the_bfd_section
= asect
;
469 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
470 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
477 clear_section_table (struct target_section_table
*table
)
479 xfree (table
->sections
);
480 table
->sections
= table
->sections_end
= NULL
;
483 /* Resize section table TABLE by ADJUSTMENT.
484 ADJUSTMENT may be negative, in which case the caller must have already
485 removed the sections being deleted.
486 Returns the old size. */
489 resize_section_table (struct target_section_table
*table
, int adjustment
)
494 old_count
= table
->sections_end
- table
->sections
;
496 new_count
= adjustment
+ old_count
;
500 table
->sections
= XRESIZEVEC (struct target_section
, table
->sections
,
502 table
->sections_end
= table
->sections
+ new_count
;
505 clear_section_table (table
);
510 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
511 Returns 0 if OK, 1 on error. */
514 build_section_table (struct bfd
*some_bfd
, struct target_section
**start
,
515 struct target_section
**end
)
519 count
= bfd_count_sections (some_bfd
);
522 *start
= XNEWVEC (struct target_section
, count
);
524 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *) end
);
525 if (*end
> *start
+ count
)
526 internal_error (__FILE__
, __LINE__
,
527 _("failed internal consistency check"));
528 /* We could realloc the table, but it probably loses for most files. */
532 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
533 current set of target sections. */
536 add_target_sections (void *owner
,
537 struct target_section
*sections
,
538 struct target_section
*sections_end
)
541 struct target_section_table
*table
= current_target_sections
;
543 count
= sections_end
- sections
;
547 int space
= resize_section_table (table
, count
);
550 for (i
= 0; i
< count
; ++i
)
552 table
->sections
[space
+ i
] = sections
[i
];
553 table
->sections
[space
+ i
].owner
= owner
;
556 /* If these are the first file sections we can provide memory
557 from, push the file_stratum target. */
558 if (!target_is_pushed (&exec_ops
))
559 push_target (&exec_ops
);
563 /* Add the sections of OBJFILE to the current set of target sections. */
566 add_target_sections_of_objfile (struct objfile
*objfile
)
568 struct target_section_table
*table
= current_target_sections
;
569 struct obj_section
*osect
;
572 struct target_section
*ts
;
577 /* Compute the number of sections to add. */
578 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
580 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
588 space
= resize_section_table (table
, count
);
590 ts
= table
->sections
+ space
;
592 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
594 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
597 gdb_assert (ts
< table
->sections
+ space
+ count
);
599 ts
->addr
= obj_section_addr (osect
);
600 ts
->endaddr
= obj_section_endaddr (osect
);
601 ts
->the_bfd_section
= osect
->the_bfd_section
;
602 ts
->owner
= (void *) objfile
;
608 /* Remove all target sections owned by OWNER.
609 OWNER must be the same value passed to add_target_sections. */
612 remove_target_sections (void *owner
)
614 struct target_section
*src
, *dest
;
615 struct target_section_table
*table
= current_target_sections
;
617 gdb_assert (owner
!= NULL
);
619 dest
= table
->sections
;
620 for (src
= table
->sections
; src
< table
->sections_end
; src
++)
621 if (src
->owner
!= owner
)
623 /* Keep this section. */
629 /* If we've dropped any sections, resize the section table. */
634 old_count
= resize_section_table (table
, dest
- src
);
636 /* If we don't have any more sections to read memory from,
637 remove the file_stratum target from the stack. */
638 if (old_count
+ (dest
- src
) == 0)
640 struct program_space
*pspace
;
643 if (pspace
->target_sections
.sections
644 != pspace
->target_sections
.sections_end
)
647 unpush_target (&exec_ops
);
654 enum target_xfer_status
655 exec_read_partial_read_only (gdb_byte
*readbuf
, ULONGEST offset
,
656 ULONGEST len
, ULONGEST
*xfered_len
)
658 /* It's unduly pedantic to refuse to look at the executable for
659 read-only pieces; so do the equivalent of readonly regions aka
661 if (exec_bfd
!= NULL
)
667 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
669 if ((s
->flags
& SEC_LOAD
) == 0
670 || (s
->flags
& SEC_READONLY
) == 0)
674 size
= bfd_get_section_size (s
);
675 if (vma
<= offset
&& offset
< (vma
+ size
))
679 amt
= (vma
+ size
) - offset
;
683 amt
= bfd_get_section_contents (exec_bfd
, s
,
684 readbuf
, offset
- vma
, amt
);
687 return TARGET_XFER_EOF
;
691 return TARGET_XFER_OK
;
697 /* Indicate failure to find the requested memory block. */
698 return TARGET_XFER_E_IO
;
701 /* Return all read-only memory ranges found in the target section
702 table defined by SECTIONS and SECTIONS_END, starting at (and
703 intersected with) MEMADDR for LEN bytes. */
705 static std::vector
<mem_range
>
706 section_table_available_memory (CORE_ADDR memaddr
, ULONGEST len
,
707 struct target_section
*sections
,
708 struct target_section
*sections_end
)
710 std::vector
<mem_range
> memory
;
712 for (target_section
*p
= sections
; p
< sections_end
; p
++)
714 if ((bfd_get_section_flags (p
->the_bfd_section
->owner
,
716 & SEC_READONLY
) == 0)
719 /* Copy the meta-data, adjusted. */
720 if (mem_ranges_overlap (p
->addr
, p
->endaddr
- p
->addr
, memaddr
, len
))
722 ULONGEST lo1
, hi1
, lo2
, hi2
;
730 CORE_ADDR start
= std::max (lo1
, lo2
);
731 int length
= std::min (hi1
, hi2
) - start
;
733 memory
.emplace_back (start
, length
);
740 enum target_xfer_status
741 section_table_read_available_memory (gdb_byte
*readbuf
, ULONGEST offset
,
742 ULONGEST len
, ULONGEST
*xfered_len
)
744 target_section_table
*table
= target_get_section_table (&exec_ops
);
745 std::vector
<mem_range
> available_memory
746 = section_table_available_memory (offset
, len
,
747 table
->sections
, table
->sections_end
);
749 normalize_mem_ranges (&available_memory
);
751 for (const mem_range
&r
: available_memory
)
753 if (mem_ranges_overlap (r
.start
, r
.length
, offset
, len
))
756 enum target_xfer_status status
;
758 /* Get the intersection window. */
759 end
= std::min
<CORE_ADDR
> (offset
+ len
, r
.start
+ r
.length
);
761 gdb_assert (end
- offset
<= len
);
763 if (offset
>= r
.start
)
764 status
= exec_read_partial_read_only (readbuf
, offset
,
769 *xfered_len
= r
.start
- offset
;
770 status
= TARGET_XFER_UNAVAILABLE
;
777 return TARGET_XFER_UNAVAILABLE
;
780 enum target_xfer_status
781 section_table_xfer_memory_partial (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
782 ULONGEST offset
, ULONGEST len
,
783 ULONGEST
*xfered_len
,
784 struct target_section
*sections
,
785 struct target_section
*sections_end
,
786 const char *section_name
)
789 struct target_section
*p
;
790 ULONGEST memaddr
= offset
;
791 ULONGEST memend
= memaddr
+ len
;
794 internal_error (__FILE__
, __LINE__
,
795 _("failed internal consistency check"));
797 for (p
= sections
; p
< sections_end
; p
++)
799 struct bfd_section
*asect
= p
->the_bfd_section
;
800 bfd
*abfd
= asect
->owner
;
802 if (section_name
&& strcmp (section_name
, asect
->name
) != 0)
803 continue; /* not the section we need. */
804 if (memaddr
>= p
->addr
)
806 if (memend
<= p
->endaddr
)
808 /* Entire transfer is within this section. */
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
,
821 return TARGET_XFER_OK
;
824 return TARGET_XFER_EOF
;
826 else if (memaddr
>= p
->endaddr
)
828 /* This section ends before the transfer starts. */
833 /* This section overlaps the transfer. Just do half. */
834 len
= p
->endaddr
- memaddr
;
836 res
= bfd_set_section_contents (abfd
, asect
,
837 writebuf
, memaddr
- p
->addr
,
840 res
= bfd_get_section_contents (abfd
, asect
,
841 readbuf
, memaddr
- p
->addr
,
846 return TARGET_XFER_OK
;
849 return TARGET_XFER_EOF
;
854 return TARGET_XFER_EOF
; /* We can't help. */
857 static struct target_section_table
*
858 exec_get_section_table (struct target_ops
*ops
)
860 return current_target_sections
;
863 static enum target_xfer_status
864 exec_xfer_partial (struct target_ops
*ops
, enum target_object object
,
865 const char *annex
, gdb_byte
*readbuf
,
866 const gdb_byte
*writebuf
,
867 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
869 struct target_section_table
*table
= target_get_section_table (ops
);
871 if (object
== TARGET_OBJECT_MEMORY
)
872 return section_table_xfer_memory_partial (readbuf
, writebuf
,
873 offset
, len
, xfered_len
,
878 return TARGET_XFER_E_IO
;
883 print_section_info (struct target_section_table
*t
, bfd
*abfd
)
885 struct gdbarch
*gdbarch
= gdbarch_from_bfd (abfd
);
886 struct target_section
*p
;
887 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
888 int wid
= gdbarch_addr_bit (gdbarch
) <= 32 ? 8 : 16;
890 printf_filtered ("\t`%s', ", bfd_get_filename (abfd
));
892 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd
));
893 if (abfd
== exec_bfd
)
895 /* gcc-3.4 does not like the initialization in
896 <p == t->sections_end>. */
897 bfd_vma displacement
= 0;
900 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
902 struct bfd_section
*psect
= p
->the_bfd_section
;
903 bfd
*pbfd
= psect
->owner
;
905 if ((bfd_get_section_flags (pbfd
, psect
) & (SEC_ALLOC
| SEC_LOAD
))
906 != (SEC_ALLOC
| SEC_LOAD
))
909 if (bfd_get_section_vma (pbfd
, psect
) <= abfd
->start_address
910 && abfd
->start_address
< (bfd_get_section_vma (pbfd
, psect
)
911 + bfd_get_section_size (psect
)))
913 displacement
= p
->addr
- bfd_get_section_vma (pbfd
, psect
);
917 if (p
== t
->sections_end
)
918 warning (_("Cannot find section for the entry point of %s."),
919 bfd_get_filename (abfd
));
921 entry_point
= gdbarch_addr_bits_remove (gdbarch
,
922 bfd_get_start_address (abfd
)
924 printf_filtered (_("\tEntry point: %s\n"),
925 paddress (gdbarch
, entry_point
));
927 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
929 struct bfd_section
*psect
= p
->the_bfd_section
;
930 bfd
*pbfd
= psect
->owner
;
932 printf_filtered ("\t%s", hex_string_custom (p
->addr
, wid
));
933 printf_filtered (" - %s", hex_string_custom (p
->endaddr
, wid
));
935 /* FIXME: A format of "08l" is not wide enough for file offsets
936 larger than 4GB. OTOH, making it "016l" isn't desirable either
937 since most output will then be much wider than necessary. It
938 may make sense to test the size of the file and choose the
939 format string accordingly. */
940 /* FIXME: i18n: Need to rewrite this sentence. */
942 printf_filtered (" @ %s",
943 hex_string_custom (psect
->filepos
, 8));
944 printf_filtered (" is %s", bfd_section_name (pbfd
, psect
));
946 printf_filtered (" in %s", bfd_get_filename (pbfd
));
947 printf_filtered ("\n");
952 exec_files_info (struct target_ops
*t
)
955 print_section_info (current_target_sections
, exec_bfd
);
957 puts_filtered (_("\t<no file loaded>\n"));
961 set_section_command (char *args
, int from_tty
)
963 struct target_section
*p
;
966 unsigned long secaddr
;
969 struct target_section_table
*table
;
972 error (_("Must specify section name and its virtual address"));
974 /* Parse out section name. */
975 for (secname
= args
; !isspace (*args
); args
++);
976 seclen
= args
- secname
;
978 /* Parse out new virtual address. */
979 secaddr
= parse_and_eval_address (args
);
981 table
= current_target_sections
;
982 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
984 if (!strncmp (secname
, bfd_section_name (p
->bfd
,
985 p
->the_bfd_section
), seclen
)
986 && bfd_section_name (p
->bfd
, p
->the_bfd_section
)[seclen
] == '\0')
988 offset
= secaddr
- p
->addr
;
990 p
->endaddr
+= offset
;
992 exec_files_info (&exec_ops
);
996 if (seclen
>= sizeof (secprint
))
997 seclen
= sizeof (secprint
) - 1;
998 strncpy (secprint
, secname
, seclen
);
999 secprint
[seclen
] = '\0';
1000 error (_("Section %s not found"), secprint
);
1003 /* If we can find a section in FILENAME with BFD index INDEX, adjust
1007 exec_set_section_address (const char *filename
, int index
, CORE_ADDR address
)
1009 struct target_section
*p
;
1010 struct target_section_table
*table
;
1012 table
= current_target_sections
;
1013 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1015 if (filename_cmp (filename
, p
->the_bfd_section
->owner
->filename
) == 0
1016 && index
== p
->the_bfd_section
->index
)
1018 p
->endaddr
+= address
- p
->addr
;
1024 /* If mourn is being called in all the right places, this could be say
1025 `gdb internal error' (since generic_mourn calls
1026 breakpoint_init_inferior). */
1029 ignore (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1030 struct bp_target_info
*bp_tgt
)
1035 /* Implement the to_remove_breakpoint method. */
1038 exec_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1039 struct bp_target_info
*bp_tgt
,
1040 enum remove_bp_reason reason
)
1046 exec_has_memory (struct target_ops
*ops
)
1048 /* We can provide memory if we have any file/target sections to read
1050 return (current_target_sections
->sections
1051 != current_target_sections
->sections_end
);
1055 exec_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
1057 error (_("Can't create a corefile"));
1060 /* Fill in the exec file target vector. Very few entries need to be
1064 init_exec_ops (void)
1066 exec_ops
.to_shortname
= "exec";
1067 exec_ops
.to_longname
= "Local exec file";
1068 exec_ops
.to_doc
= "Use an executable file as a target.\n\
1069 Specify the filename of the executable file.";
1070 exec_ops
.to_open
= exec_open
;
1071 exec_ops
.to_close
= exec_close_1
;
1072 exec_ops
.to_xfer_partial
= exec_xfer_partial
;
1073 exec_ops
.to_get_section_table
= exec_get_section_table
;
1074 exec_ops
.to_files_info
= exec_files_info
;
1075 exec_ops
.to_insert_breakpoint
= ignore
;
1076 exec_ops
.to_remove_breakpoint
= exec_remove_breakpoint
;
1077 exec_ops
.to_stratum
= file_stratum
;
1078 exec_ops
.to_has_memory
= exec_has_memory
;
1079 exec_ops
.to_make_corefile_notes
= exec_make_note_section
;
1080 exec_ops
.to_find_memory_regions
= objfile_find_memory_regions
;
1081 exec_ops
.to_magic
= OPS_MAGIC
;
1085 _initialize_exec (void)
1087 struct cmd_list_element
*c
;
1093 c
= add_cmd ("file", class_files
, file_command
, _("\
1094 Use FILE as program to be debugged.\n\
1095 It is read for its symbols, for getting the contents of pure memory,\n\
1096 and it is the program executed when you use the `run' command.\n\
1097 If FILE cannot be found as specified, your execution directory path\n\
1098 ($PATH) is searched for a command of that name.\n\
1099 No arg means to have no executable file and no symbols."), &cmdlist
);
1100 set_cmd_completer (c
, filename_completer
);
1103 c
= add_cmd ("exec-file", class_files
, exec_file_command
, _("\
1104 Use FILE as program for getting contents of pure memory.\n\
1105 If FILE cannot be found as specified, your execution directory path\n\
1106 is searched for a command of that name.\n\
1107 No arg means have no executable file."), &cmdlist
);
1108 set_cmd_completer (c
, filename_completer
);
1110 add_com ("section", class_files
, set_section_command
, _("\
1111 Change the base address of section SECTION of the exec file to ADDR.\n\
1112 This can be used if the exec file does not contain section addresses,\n\
1113 (such as in the a.out format), or when the addresses specified in the\n\
1114 file itself are wrong. Each section must be changed separately. The\n\
1115 ``info files'' command lists all the sections and their addresses."));
1117 add_setshow_boolean_cmd ("write", class_support
, &write_files
, _("\
1118 Set writing into executable and core files."), _("\
1119 Show writing into executable and core files."), NULL
,
1122 &setlist
, &showlist
);
1124 add_target_with_completer (&exec_ops
, filename_completer
);