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 exec_files_info (struct target_ops
*);
54 static void init_exec_ops (void);
56 /* The target vector for executable files. */
58 static struct target_ops exec_ops
;
60 /* Whether to open exec and core files read-only or read-write. */
64 show_write_files (struct ui_file
*file
, int from_tty
,
65 struct cmd_list_element
*c
, const char *value
)
67 fprintf_filtered (file
, _("Writing into executable and core files is %s.\n"),
73 exec_open (const char *args
, int from_tty
)
75 target_preopen (from_tty
);
76 exec_file_attach (args
, from_tty
);
79 /* Close and clear exec_bfd. If we end up with no target sections to
80 read memory from, this unpushes the exec_ops target. */
91 /* Removing target sections may close the exec_ops target.
92 Clear exec_bfd before doing so to prevent recursion. */
96 remove_target_sections (&exec_bfd
);
98 xfree (exec_filename
);
103 /* This is the target_close implementation. Clears all target
104 sections and closes all executable bfds from all program spaces. */
107 exec_close_1 (struct target_ops
*self
)
109 struct program_space
*ss
;
110 scoped_restore_current_program_space restore_pspace
;
114 set_current_program_space (ss
);
115 clear_section_table (current_target_sections
);
121 exec_file_clear (int from_tty
)
123 /* Remove exec file. */
127 printf_unfiltered (_("No executable file now.\n"));
133 try_open_exec_file (const char *exec_file_host
, struct inferior
*inf
,
134 symfile_add_flags add_flags
)
136 struct cleanup
*old_chain
;
137 struct gdb_exception prev_err
= exception_none
;
139 old_chain
= make_cleanup (free_current_contents
, &prev_err
.message
);
141 /* exec_file_attach and symbol_file_add_main may throw an error if the file
142 cannot be opened either locally or remotely.
144 This happens for example, when the file is first found in the local
145 sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
146 exist in the target filesystem, or when the file does exist, but
149 Even without a symbol file, the remote-based debugging session should
150 continue normally instead of ending abruptly. Hence we catch thrown
151 errors/exceptions in the following code. */
154 /* We must do this step even if exec_file_host is NULL, so that
155 exec_file_attach will clear state. */
156 exec_file_attach (exec_file_host
, add_flags
& SYMFILE_VERBOSE
);
158 CATCH (err
, RETURN_MASK_ERROR
)
160 if (err
.message
!= NULL
)
161 warning ("%s", err
.message
);
165 /* Save message so it doesn't get trashed by the catch below. */
166 if (err
.message
!= NULL
)
167 prev_err
.message
= xstrdup (err
.message
);
171 if (exec_file_host
!= NULL
)
175 symbol_file_add_main (exec_file_host
, add_flags
);
177 CATCH (err
, RETURN_MASK_ERROR
)
179 if (!exception_print_same (prev_err
, err
))
180 warning ("%s", err
.message
);
185 do_cleanups (old_chain
);
191 exec_file_locate_attach (int pid
, int defer_bp_reset
, int from_tty
)
193 char *exec_file_target
, *exec_file_host
;
194 struct cleanup
*old_chain
;
195 symfile_add_flags add_flags
= 0;
197 /* Do nothing if we already have an executable filename. */
198 if (get_exec_file (0) != NULL
)
201 /* Try to determine a filename from the process itself. */
202 exec_file_target
= target_pid_to_exec_file (pid
);
203 if (exec_file_target
== NULL
)
205 warning (_("No executable has been specified and target does not "
207 "determining executable automatically. "
208 "Try using the \"file\" command."));
212 exec_file_host
= exec_file_find (exec_file_target
, NULL
);
213 old_chain
= make_cleanup (xfree
, exec_file_host
);
216 add_flags
|= SYMFILE_DEFER_BP_RESET
;
219 add_flags
|= SYMFILE_VERBOSE
;
221 /* Attempt to open the exec file. */
222 try_open_exec_file (exec_file_host
, current_inferior (), add_flags
);
223 do_cleanups (old_chain
);
226 /* Set FILENAME as the new exec file.
228 This function is intended to be behave essentially the same
229 as exec_file_command, except that the latter will detect when
230 a target is being debugged, and will ask the user whether it
231 should be shut down first. (If the answer is "no", then the
232 new file is ignored.)
234 This file is used by exec_file_command, to do the work of opening
235 and processing the exec file after any prompting has happened.
237 And, it is used by child_attach, when the attach command was
238 given a pid but not a exec pathname, and the attach command could
239 figure out the pathname from the pid. (In this case, we shouldn't
240 ask the user whether the current target should be shut down --
241 we're supplying the exec pathname late for good reason.) */
244 exec_file_attach (const char *filename
, int from_tty
)
246 /* First, acquire a reference to the current exec_bfd. We release
247 this at the end of the function; but acquiring it now lets the
248 BFD cache return it if this call refers to the same file. */
249 gdb_bfd_ref_ptr exec_bfd_holder
= new_bfd_ref (exec_bfd
);
251 /* Remove any previous exec file. */
254 /* Now open and digest the file the user requested, if any. */
259 printf_unfiltered (_("No executable file now.\n"));
261 set_gdbarch_from_file (NULL
);
265 int load_via_target
= 0;
266 const char *scratch_pathname
, *canonical_pathname
;
268 struct target_section
*sections
= NULL
, *sections_end
= NULL
;
271 if (is_target_filename (filename
))
273 if (target_filesystem_is_local ())
274 filename
+= strlen (TARGET_SYSROOT_PREFIX
);
279 gdb::unique_xmalloc_ptr
<char> canonical_storage
, scratch_storage
;
282 /* gdb_bfd_fopen does not support "target:" filenames. */
284 warning (_("writing into executable files is "
285 "not supported for %s sysroots"),
286 TARGET_SYSROOT_PREFIX
);
288 scratch_pathname
= filename
;
290 canonical_pathname
= scratch_pathname
;
296 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
297 filename
, write_files
?
298 O_RDWR
| O_BINARY
: O_RDONLY
| O_BINARY
,
300 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
301 if (scratch_chan
< 0)
303 char *exename
= (char *) alloca (strlen (filename
) + 5);
305 strcat (strcpy (exename
, filename
), ".exe");
306 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
307 exename
, write_files
?
309 : O_RDONLY
| O_BINARY
,
313 if (scratch_chan
< 0)
314 perror_with_name (filename
);
316 scratch_storage
.reset (temp_pathname
);
317 scratch_pathname
= temp_pathname
;
319 /* gdb_bfd_open (and its variants) prefers canonicalized
320 pathname for better BFD caching. */
321 canonical_storage
= gdb_realpath (scratch_pathname
);
322 canonical_pathname
= canonical_storage
.get ();
325 gdb_bfd_ref_ptr temp
;
326 if (write_files
&& !load_via_target
)
327 temp
= gdb_bfd_fopen (canonical_pathname
, gnutarget
,
328 FOPEN_RUB
, scratch_chan
);
330 temp
= gdb_bfd_open (canonical_pathname
, gnutarget
, scratch_chan
);
331 exec_bfd
= temp
.release ();
335 error (_("\"%s\": could not open as an executable file: %s."),
336 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
339 /* gdb_realpath_keepfile resolves symlinks on the local
340 filesystem and so cannot be used for "target:" files. */
341 gdb_assert (exec_filename
== NULL
);
343 exec_filename
= xstrdup (bfd_get_filename (exec_bfd
));
345 exec_filename
= gdb_realpath_keepfile (scratch_pathname
).release ();
347 if (!bfd_check_format_matches (exec_bfd
, bfd_object
, &matching
))
349 /* Make sure to close exec_bfd, or else "run" might try to use
352 error (_("\"%s\": not in executable format: %s"),
354 gdb_bfd_errmsg (bfd_get_error (), matching
));
357 if (build_section_table (exec_bfd
, §ions
, §ions_end
))
359 /* Make sure to close exec_bfd, or else "run" might try to use
362 error (_("\"%s\": can't find the file sections: %s"),
363 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
366 exec_bfd_mtime
= bfd_get_mtime (exec_bfd
);
370 set_gdbarch_from_file (exec_bfd
);
372 /* Add the executable's sections to the current address spaces'
373 list of sections. This possibly pushes the exec_ops
375 add_target_sections (&exec_bfd
, sections
, sections_end
);
378 /* Tell display code (if any) about the changed file name. */
379 if (deprecated_exec_file_display_hook
)
380 (*deprecated_exec_file_display_hook
) (filename
);
383 bfd_cache_close_all ();
384 observer_notify_executable_changed ();
387 /* Process the first arg in ARGS as the new exec file.
389 Note that we have to explicitly ignore additional args, since we can
390 be called from file_command(), which also calls symbol_file_command()
391 which can take multiple args.
393 If ARGS is NULL, we just want to close the exec file. */
396 exec_file_command (const char *args
, int from_tty
)
400 if (from_tty
&& target_has_execution
401 && !query (_("A program is being debugged already.\n"
402 "Are you sure you want to change the file? ")))
403 error (_("File not changed."));
407 /* Scan through the args and pick up the first non option arg
410 gdb_argv
built_argv (args
);
411 char **argv
= built_argv
.get ();
413 for (; (*argv
!= NULL
) && (**argv
== '-'); argv
++)
417 error (_("No executable file name was specified"));
419 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (*argv
));
420 exec_file_attach (filename
.get (), from_tty
);
423 exec_file_attach (NULL
, from_tty
);
426 /* Set both the exec file and the symbol file, in one command.
427 What a novelty. Why did GDB go through four major releases before this
428 command was added? */
431 file_command (const char *arg
, int from_tty
)
433 /* FIXME, if we lose on reading the symbol file, we should revert
434 the exec file, but that's rough. */
435 exec_file_command (arg
, from_tty
);
436 symbol_file_command (arg
, from_tty
);
437 if (deprecated_file_changed_hook
)
438 deprecated_file_changed_hook (arg
);
442 /* Locate all mappable sections of a BFD file.
443 table_pp_char is a char * to get it through bfd_map_over_sections;
444 we cast it back to its proper type. */
447 add_to_section_table (bfd
*abfd
, struct bfd_section
*asect
,
450 struct target_section
**table_pp
= (struct target_section
**) table_pp_char
;
453 gdb_assert (abfd
== asect
->owner
);
455 /* Check the section flags, but do not discard zero-length sections, since
456 some symbols may still be attached to this section. For instance, we
457 encountered on sparc-solaris 2.10 a shared library with an empty .bss
458 section to which a symbol named "_end" was attached. The address
459 of this symbol still needs to be relocated. */
460 aflag
= bfd_get_section_flags (abfd
, asect
);
461 if (!(aflag
& SEC_ALLOC
))
464 (*table_pp
)->owner
= NULL
;
465 (*table_pp
)->the_bfd_section
= asect
;
466 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
467 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
474 clear_section_table (struct target_section_table
*table
)
476 xfree (table
->sections
);
477 table
->sections
= table
->sections_end
= NULL
;
480 /* Resize section table TABLE by ADJUSTMENT.
481 ADJUSTMENT may be negative, in which case the caller must have already
482 removed the sections being deleted.
483 Returns the old size. */
486 resize_section_table (struct target_section_table
*table
, int adjustment
)
491 old_count
= table
->sections_end
- table
->sections
;
493 new_count
= adjustment
+ old_count
;
497 table
->sections
= XRESIZEVEC (struct target_section
, table
->sections
,
499 table
->sections_end
= table
->sections
+ new_count
;
502 clear_section_table (table
);
507 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
508 Returns 0 if OK, 1 on error. */
511 build_section_table (struct bfd
*some_bfd
, struct target_section
**start
,
512 struct target_section
**end
)
516 count
= bfd_count_sections (some_bfd
);
519 *start
= XNEWVEC (struct target_section
, count
);
521 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *) end
);
522 if (*end
> *start
+ count
)
523 internal_error (__FILE__
, __LINE__
,
524 _("failed internal consistency check"));
525 /* We could realloc the table, but it probably loses for most files. */
529 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
530 current set of target sections. */
533 add_target_sections (void *owner
,
534 struct target_section
*sections
,
535 struct target_section
*sections_end
)
538 struct target_section_table
*table
= current_target_sections
;
540 count
= sections_end
- sections
;
544 int space
= resize_section_table (table
, count
);
547 for (i
= 0; i
< count
; ++i
)
549 table
->sections
[space
+ i
] = sections
[i
];
550 table
->sections
[space
+ i
].owner
= owner
;
553 /* If these are the first file sections we can provide memory
554 from, push the file_stratum target. */
555 if (!target_is_pushed (&exec_ops
))
556 push_target (&exec_ops
);
560 /* Add the sections of OBJFILE to the current set of target sections. */
563 add_target_sections_of_objfile (struct objfile
*objfile
)
565 struct target_section_table
*table
= current_target_sections
;
566 struct obj_section
*osect
;
569 struct target_section
*ts
;
574 /* Compute the number of sections to add. */
575 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
577 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
585 space
= resize_section_table (table
, count
);
587 ts
= table
->sections
+ space
;
589 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
591 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
594 gdb_assert (ts
< table
->sections
+ space
+ count
);
596 ts
->addr
= obj_section_addr (osect
);
597 ts
->endaddr
= obj_section_endaddr (osect
);
598 ts
->the_bfd_section
= osect
->the_bfd_section
;
599 ts
->owner
= (void *) objfile
;
605 /* Remove all target sections owned by OWNER.
606 OWNER must be the same value passed to add_target_sections. */
609 remove_target_sections (void *owner
)
611 struct target_section
*src
, *dest
;
612 struct target_section_table
*table
= current_target_sections
;
614 gdb_assert (owner
!= NULL
);
616 dest
= table
->sections
;
617 for (src
= table
->sections
; src
< table
->sections_end
; src
++)
618 if (src
->owner
!= owner
)
620 /* Keep this section. */
626 /* If we've dropped any sections, resize the section table. */
631 old_count
= resize_section_table (table
, dest
- src
);
633 /* If we don't have any more sections to read memory from,
634 remove the file_stratum target from the stack. */
635 if (old_count
+ (dest
- src
) == 0)
637 struct program_space
*pspace
;
640 if (pspace
->target_sections
.sections
641 != pspace
->target_sections
.sections_end
)
644 unpush_target (&exec_ops
);
651 enum target_xfer_status
652 exec_read_partial_read_only (gdb_byte
*readbuf
, ULONGEST offset
,
653 ULONGEST len
, ULONGEST
*xfered_len
)
655 /* It's unduly pedantic to refuse to look at the executable for
656 read-only pieces; so do the equivalent of readonly regions aka
658 if (exec_bfd
!= NULL
)
664 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
666 if ((s
->flags
& SEC_LOAD
) == 0
667 || (s
->flags
& SEC_READONLY
) == 0)
671 size
= bfd_get_section_size (s
);
672 if (vma
<= offset
&& offset
< (vma
+ size
))
676 amt
= (vma
+ size
) - offset
;
680 amt
= bfd_get_section_contents (exec_bfd
, s
,
681 readbuf
, offset
- vma
, amt
);
684 return TARGET_XFER_EOF
;
688 return TARGET_XFER_OK
;
694 /* Indicate failure to find the requested memory block. */
695 return TARGET_XFER_E_IO
;
698 /* Return all read-only memory ranges found in the target section
699 table defined by SECTIONS and SECTIONS_END, starting at (and
700 intersected with) MEMADDR for LEN bytes. */
702 static std::vector
<mem_range
>
703 section_table_available_memory (CORE_ADDR memaddr
, ULONGEST len
,
704 struct target_section
*sections
,
705 struct target_section
*sections_end
)
707 std::vector
<mem_range
> memory
;
709 for (target_section
*p
= sections
; p
< sections_end
; p
++)
711 if ((bfd_get_section_flags (p
->the_bfd_section
->owner
,
713 & SEC_READONLY
) == 0)
716 /* Copy the meta-data, adjusted. */
717 if (mem_ranges_overlap (p
->addr
, p
->endaddr
- p
->addr
, memaddr
, len
))
719 ULONGEST lo1
, hi1
, lo2
, hi2
;
727 CORE_ADDR start
= std::max (lo1
, lo2
);
728 int length
= std::min (hi1
, hi2
) - start
;
730 memory
.emplace_back (start
, length
);
737 enum target_xfer_status
738 section_table_read_available_memory (gdb_byte
*readbuf
, ULONGEST offset
,
739 ULONGEST len
, ULONGEST
*xfered_len
)
741 target_section_table
*table
= target_get_section_table (&exec_ops
);
742 std::vector
<mem_range
> available_memory
743 = section_table_available_memory (offset
, len
,
744 table
->sections
, table
->sections_end
);
746 normalize_mem_ranges (&available_memory
);
748 for (const mem_range
&r
: available_memory
)
750 if (mem_ranges_overlap (r
.start
, r
.length
, offset
, len
))
753 enum target_xfer_status status
;
755 /* Get the intersection window. */
756 end
= std::min
<CORE_ADDR
> (offset
+ len
, r
.start
+ r
.length
);
758 gdb_assert (end
- offset
<= len
);
760 if (offset
>= r
.start
)
761 status
= exec_read_partial_read_only (readbuf
, offset
,
766 *xfered_len
= r
.start
- offset
;
767 status
= TARGET_XFER_UNAVAILABLE
;
774 return TARGET_XFER_UNAVAILABLE
;
777 enum target_xfer_status
778 section_table_xfer_memory_partial (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
779 ULONGEST offset
, ULONGEST len
,
780 ULONGEST
*xfered_len
,
781 struct target_section
*sections
,
782 struct target_section
*sections_end
,
783 const char *section_name
)
786 struct target_section
*p
;
787 ULONGEST memaddr
= offset
;
788 ULONGEST memend
= memaddr
+ len
;
791 internal_error (__FILE__
, __LINE__
,
792 _("failed internal consistency check"));
794 for (p
= sections
; p
< sections_end
; p
++)
796 struct bfd_section
*asect
= p
->the_bfd_section
;
797 bfd
*abfd
= asect
->owner
;
799 if (section_name
&& strcmp (section_name
, asect
->name
) != 0)
800 continue; /* not the section we need. */
801 if (memaddr
>= p
->addr
)
803 if (memend
<= p
->endaddr
)
805 /* Entire transfer is within this section. */
807 res
= bfd_set_section_contents (abfd
, asect
,
808 writebuf
, memaddr
- p
->addr
,
811 res
= bfd_get_section_contents (abfd
, asect
,
812 readbuf
, memaddr
- p
->addr
,
818 return TARGET_XFER_OK
;
821 return TARGET_XFER_EOF
;
823 else if (memaddr
>= p
->endaddr
)
825 /* This section ends before the transfer starts. */
830 /* This section overlaps the transfer. Just do half. */
831 len
= p
->endaddr
- memaddr
;
833 res
= bfd_set_section_contents (abfd
, asect
,
834 writebuf
, memaddr
- p
->addr
,
837 res
= bfd_get_section_contents (abfd
, asect
,
838 readbuf
, memaddr
- p
->addr
,
843 return TARGET_XFER_OK
;
846 return TARGET_XFER_EOF
;
851 return TARGET_XFER_EOF
; /* We can't help. */
854 static struct target_section_table
*
855 exec_get_section_table (struct target_ops
*ops
)
857 return current_target_sections
;
860 static enum target_xfer_status
861 exec_xfer_partial (struct target_ops
*ops
, enum target_object object
,
862 const char *annex
, gdb_byte
*readbuf
,
863 const gdb_byte
*writebuf
,
864 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
866 struct target_section_table
*table
= target_get_section_table (ops
);
868 if (object
== TARGET_OBJECT_MEMORY
)
869 return section_table_xfer_memory_partial (readbuf
, writebuf
,
870 offset
, len
, xfered_len
,
875 return TARGET_XFER_E_IO
;
880 print_section_info (struct target_section_table
*t
, bfd
*abfd
)
882 struct gdbarch
*gdbarch
= gdbarch_from_bfd (abfd
);
883 struct target_section
*p
;
884 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
885 int wid
= gdbarch_addr_bit (gdbarch
) <= 32 ? 8 : 16;
887 printf_filtered ("\t`%s', ", bfd_get_filename (abfd
));
889 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd
));
890 if (abfd
== exec_bfd
)
892 /* gcc-3.4 does not like the initialization in
893 <p == t->sections_end>. */
894 bfd_vma displacement
= 0;
897 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
899 struct bfd_section
*psect
= p
->the_bfd_section
;
900 bfd
*pbfd
= psect
->owner
;
902 if ((bfd_get_section_flags (pbfd
, psect
) & (SEC_ALLOC
| SEC_LOAD
))
903 != (SEC_ALLOC
| SEC_LOAD
))
906 if (bfd_get_section_vma (pbfd
, psect
) <= abfd
->start_address
907 && abfd
->start_address
< (bfd_get_section_vma (pbfd
, psect
)
908 + bfd_get_section_size (psect
)))
910 displacement
= p
->addr
- bfd_get_section_vma (pbfd
, psect
);
914 if (p
== t
->sections_end
)
915 warning (_("Cannot find section for the entry point of %s."),
916 bfd_get_filename (abfd
));
918 entry_point
= gdbarch_addr_bits_remove (gdbarch
,
919 bfd_get_start_address (abfd
)
921 printf_filtered (_("\tEntry point: %s\n"),
922 paddress (gdbarch
, entry_point
));
924 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
926 struct bfd_section
*psect
= p
->the_bfd_section
;
927 bfd
*pbfd
= psect
->owner
;
929 printf_filtered ("\t%s", hex_string_custom (p
->addr
, wid
));
930 printf_filtered (" - %s", hex_string_custom (p
->endaddr
, wid
));
932 /* FIXME: A format of "08l" is not wide enough for file offsets
933 larger than 4GB. OTOH, making it "016l" isn't desirable either
934 since most output will then be much wider than necessary. It
935 may make sense to test the size of the file and choose the
936 format string accordingly. */
937 /* FIXME: i18n: Need to rewrite this sentence. */
939 printf_filtered (" @ %s",
940 hex_string_custom (psect
->filepos
, 8));
941 printf_filtered (" is %s", bfd_section_name (pbfd
, psect
));
943 printf_filtered (" in %s", bfd_get_filename (pbfd
));
944 printf_filtered ("\n");
949 exec_files_info (struct target_ops
*t
)
952 print_section_info (current_target_sections
, exec_bfd
);
954 puts_filtered (_("\t<no file loaded>\n"));
958 set_section_command (const char *args
, int from_tty
)
960 struct target_section
*p
;
963 unsigned long secaddr
;
966 struct target_section_table
*table
;
969 error (_("Must specify section name and its virtual address"));
971 /* Parse out section name. */
972 for (secname
= args
; !isspace (*args
); args
++);
973 seclen
= args
- secname
;
975 /* Parse out new virtual address. */
976 secaddr
= parse_and_eval_address (args
);
978 table
= current_target_sections
;
979 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
981 if (!strncmp (secname
, bfd_section_name (p
->bfd
,
982 p
->the_bfd_section
), seclen
)
983 && bfd_section_name (p
->bfd
, p
->the_bfd_section
)[seclen
] == '\0')
985 offset
= secaddr
- p
->addr
;
987 p
->endaddr
+= offset
;
989 exec_files_info (&exec_ops
);
993 if (seclen
>= sizeof (secprint
))
994 seclen
= sizeof (secprint
) - 1;
995 strncpy (secprint
, secname
, seclen
);
996 secprint
[seclen
] = '\0';
997 error (_("Section %s not found"), secprint
);
1000 /* If we can find a section in FILENAME with BFD index INDEX, adjust
1004 exec_set_section_address (const char *filename
, int index
, CORE_ADDR address
)
1006 struct target_section
*p
;
1007 struct target_section_table
*table
;
1009 table
= current_target_sections
;
1010 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1012 if (filename_cmp (filename
, p
->the_bfd_section
->owner
->filename
) == 0
1013 && index
== p
->the_bfd_section
->index
)
1015 p
->endaddr
+= address
- p
->addr
;
1021 /* If mourn is being called in all the right places, this could be say
1022 `gdb internal error' (since generic_mourn calls
1023 breakpoint_init_inferior). */
1026 ignore (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1027 struct bp_target_info
*bp_tgt
)
1032 /* Implement the to_remove_breakpoint method. */
1035 exec_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1036 struct bp_target_info
*bp_tgt
,
1037 enum remove_bp_reason reason
)
1043 exec_has_memory (struct target_ops
*ops
)
1045 /* We can provide memory if we have any file/target sections to read
1047 return (current_target_sections
->sections
1048 != current_target_sections
->sections_end
);
1052 exec_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
1054 error (_("Can't create a corefile"));
1057 /* Fill in the exec file target vector. Very few entries need to be
1061 init_exec_ops (void)
1063 exec_ops
.to_shortname
= "exec";
1064 exec_ops
.to_longname
= "Local exec file";
1065 exec_ops
.to_doc
= "Use an executable file as a target.\n\
1066 Specify the filename of the executable file.";
1067 exec_ops
.to_open
= exec_open
;
1068 exec_ops
.to_close
= exec_close_1
;
1069 exec_ops
.to_xfer_partial
= exec_xfer_partial
;
1070 exec_ops
.to_get_section_table
= exec_get_section_table
;
1071 exec_ops
.to_files_info
= exec_files_info
;
1072 exec_ops
.to_insert_breakpoint
= ignore
;
1073 exec_ops
.to_remove_breakpoint
= exec_remove_breakpoint
;
1074 exec_ops
.to_stratum
= file_stratum
;
1075 exec_ops
.to_has_memory
= exec_has_memory
;
1076 exec_ops
.to_make_corefile_notes
= exec_make_note_section
;
1077 exec_ops
.to_find_memory_regions
= objfile_find_memory_regions
;
1078 exec_ops
.to_magic
= OPS_MAGIC
;
1082 _initialize_exec (void)
1084 struct cmd_list_element
*c
;
1090 c
= add_cmd ("file", class_files
, file_command
, _("\
1091 Use FILE as program to be debugged.\n\
1092 It is read for its symbols, for getting the contents of pure memory,\n\
1093 and it is the program executed when you use the `run' command.\n\
1094 If FILE cannot be found as specified, your execution directory path\n\
1095 ($PATH) is searched for a command of that name.\n\
1096 No arg means to have no executable file and no symbols."), &cmdlist
);
1097 set_cmd_completer (c
, filename_completer
);
1100 c
= add_cmd ("exec-file", class_files
, exec_file_command
, _("\
1101 Use FILE as program for getting contents of pure memory.\n\
1102 If FILE cannot be found as specified, your execution directory path\n\
1103 is searched for a command of that name.\n\
1104 No arg means have no executable file."), &cmdlist
);
1105 set_cmd_completer (c
, filename_completer
);
1107 add_com ("section", class_files
, set_section_command
, _("\
1108 Change the base address of section SECTION of the exec file to ADDR.\n\
1109 This can be used if the exec file does not contain section addresses,\n\
1110 (such as in the a.out format), or when the addresses specified in the\n\
1111 file itself are wrong. Each section must be changed separately. The\n\
1112 ``info files'' command lists all the sections and their addresses."));
1114 add_setshow_boolean_cmd ("write", class_support
, &write_files
, _("\
1115 Set writing into executable and core files."), _("\
1116 Show writing into executable and core files."), NULL
,
1119 &setlist
, &showlist
);
1121 add_target_with_completer (&exec_ops
, filename_completer
);