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 scoped_restore_current_program_space restore_pspace
;
120 set_current_program_space (ss
);
121 clear_section_table (current_target_sections
);
127 exec_file_clear (int from_tty
)
129 /* Remove exec file. */
133 printf_unfiltered (_("No executable file now.\n"));
139 try_open_exec_file (const char *exec_file_host
, struct inferior
*inf
,
140 symfile_add_flags add_flags
)
142 struct cleanup
*old_chain
;
143 struct gdb_exception prev_err
= exception_none
;
145 old_chain
= make_cleanup (free_current_contents
, &prev_err
.message
);
147 /* exec_file_attach and symbol_file_add_main may throw an error if the file
148 cannot be opened either locally or remotely.
150 This happens for example, when the file is first found in the local
151 sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
152 exist in the target filesystem, or when the file does exist, but
155 Even without a symbol file, the remote-based debugging session should
156 continue normally instead of ending abruptly. Hence we catch thrown
157 errors/exceptions in the following code. */
160 /* We must do this step even if exec_file_host is NULL, so that
161 exec_file_attach will clear state. */
162 exec_file_attach (exec_file_host
, add_flags
& SYMFILE_VERBOSE
);
164 CATCH (err
, RETURN_MASK_ERROR
)
166 if (err
.message
!= NULL
)
167 warning ("%s", err
.message
);
171 /* Save message so it doesn't get trashed by the catch below. */
172 if (err
.message
!= NULL
)
173 prev_err
.message
= xstrdup (err
.message
);
177 if (exec_file_host
!= NULL
)
181 symbol_file_add_main (exec_file_host
, add_flags
);
183 CATCH (err
, RETURN_MASK_ERROR
)
185 if (!exception_print_same (prev_err
, err
))
186 warning ("%s", err
.message
);
191 do_cleanups (old_chain
);
197 exec_file_locate_attach (int pid
, int defer_bp_reset
, int from_tty
)
199 char *exec_file_target
, *exec_file_host
;
200 struct cleanup
*old_chain
;
201 symfile_add_flags add_flags
= 0;
203 /* Do nothing if we already have an executable filename. */
204 if (get_exec_file (0) != NULL
)
207 /* Try to determine a filename from the process itself. */
208 exec_file_target
= target_pid_to_exec_file (pid
);
209 if (exec_file_target
== NULL
)
211 warning (_("No executable has been specified and target does not "
213 "determining executable automatically. "
214 "Try using the \"file\" command."));
218 exec_file_host
= exec_file_find (exec_file_target
, NULL
);
219 old_chain
= make_cleanup (xfree
, exec_file_host
);
222 add_flags
|= SYMFILE_DEFER_BP_RESET
;
225 add_flags
|= SYMFILE_VERBOSE
;
227 /* Attempt to open the exec file. */
228 try_open_exec_file (exec_file_host
, current_inferior (), add_flags
);
229 do_cleanups (old_chain
);
232 /* Set FILENAME as the new exec file.
234 This function is intended to be behave essentially the same
235 as exec_file_command, except that the latter will detect when
236 a target is being debugged, and will ask the user whether it
237 should be shut down first. (If the answer is "no", then the
238 new file is ignored.)
240 This file is used by exec_file_command, to do the work of opening
241 and processing the exec file after any prompting has happened.
243 And, it is used by child_attach, when the attach command was
244 given a pid but not a exec pathname, and the attach command could
245 figure out the pathname from the pid. (In this case, we shouldn't
246 ask the user whether the current target should be shut down --
247 we're supplying the exec pathname late for good reason.) */
250 exec_file_attach (const char *filename
, int from_tty
)
252 struct cleanup
*cleanups
;
254 /* First, acquire a reference to the current exec_bfd. We release
255 this at the end of the function; but acquiring it now lets the
256 BFD cache return it if this call refers to the same file. */
257 gdb_bfd_ref (exec_bfd
);
258 gdb_bfd_ref_ptr
exec_bfd_holder (exec_bfd
);
260 cleanups
= make_cleanup (null_cleanup
, NULL
);
262 /* Remove any previous exec file. */
265 /* Now open and digest the file the user requested, if any. */
270 printf_unfiltered (_("No executable file now.\n"));
272 set_gdbarch_from_file (NULL
);
276 int load_via_target
= 0;
277 char *scratch_pathname
, *canonical_pathname
;
279 struct target_section
*sections
= NULL
, *sections_end
= NULL
;
282 if (is_target_filename (filename
))
284 if (target_filesystem_is_local ())
285 filename
+= strlen (TARGET_SYSROOT_PREFIX
);
292 /* gdb_bfd_fopen does not support "target:" filenames. */
294 warning (_("writing into executable files is "
295 "not supported for %s sysroots"),
296 TARGET_SYSROOT_PREFIX
);
298 scratch_pathname
= xstrdup (filename
);
299 make_cleanup (xfree
, scratch_pathname
);
303 canonical_pathname
= scratch_pathname
;
307 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
308 filename
, write_files
?
309 O_RDWR
| O_BINARY
: O_RDONLY
| O_BINARY
,
311 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
312 if (scratch_chan
< 0)
314 char *exename
= (char *) alloca (strlen (filename
) + 5);
316 strcat (strcpy (exename
, filename
), ".exe");
317 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
318 exename
, write_files
?
320 : O_RDONLY
| O_BINARY
,
324 if (scratch_chan
< 0)
325 perror_with_name (filename
);
327 make_cleanup (xfree
, scratch_pathname
);
329 /* gdb_bfd_open (and its variants) prefers canonicalized
330 pathname for better BFD caching. */
331 canonical_pathname
= gdb_realpath (scratch_pathname
);
332 make_cleanup (xfree
, canonical_pathname
);
335 gdb_bfd_ref_ptr temp
;
336 if (write_files
&& !load_via_target
)
337 temp
= gdb_bfd_fopen (canonical_pathname
, gnutarget
,
338 FOPEN_RUB
, scratch_chan
);
340 temp
= gdb_bfd_open (canonical_pathname
, gnutarget
, scratch_chan
);
341 exec_bfd
= temp
.release ();
345 error (_("\"%s\": could not open as an executable file: %s."),
346 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
349 /* gdb_realpath_keepfile resolves symlinks on the local
350 filesystem and so cannot be used for "target:" files. */
351 gdb_assert (exec_filename
== NULL
);
353 exec_filename
= xstrdup (bfd_get_filename (exec_bfd
));
355 exec_filename
= gdb_realpath_keepfile (scratch_pathname
);
357 if (!bfd_check_format_matches (exec_bfd
, bfd_object
, &matching
))
359 /* Make sure to close exec_bfd, or else "run" might try to use
362 error (_("\"%s\": not in executable format: %s"),
364 gdb_bfd_errmsg (bfd_get_error (), matching
));
367 if (build_section_table (exec_bfd
, §ions
, §ions_end
))
369 /* Make sure to close exec_bfd, or else "run" might try to use
372 error (_("\"%s\": can't find the file sections: %s"),
373 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
376 exec_bfd_mtime
= bfd_get_mtime (exec_bfd
);
380 set_gdbarch_from_file (exec_bfd
);
382 /* Add the executable's sections to the current address spaces'
383 list of sections. This possibly pushes the exec_ops
385 add_target_sections (&exec_bfd
, sections
, sections_end
);
388 /* Tell display code (if any) about the changed file name. */
389 if (deprecated_exec_file_display_hook
)
390 (*deprecated_exec_file_display_hook
) (filename
);
393 do_cleanups (cleanups
);
395 bfd_cache_close_all ();
396 observer_notify_executable_changed ();
399 /* Process the first arg in ARGS as the new exec file.
401 Note that we have to explicitly ignore additional args, since we can
402 be called from file_command(), which also calls symbol_file_command()
403 which can take multiple args.
405 If ARGS is NULL, we just want to close the exec file. */
408 exec_file_command (char *args
, int from_tty
)
413 if (from_tty
&& target_has_execution
414 && !query (_("A program is being debugged already.\n"
415 "Are you sure you want to change the file? ")))
416 error (_("File not changed."));
420 struct cleanup
*cleanups
;
422 /* Scan through the args and pick up the first non option arg
425 argv
= gdb_buildargv (args
);
426 cleanups
= make_cleanup_freeargv (argv
);
428 for (; (*argv
!= NULL
) && (**argv
== '-'); argv
++)
432 error (_("No executable file name was specified"));
434 filename
= tilde_expand (*argv
);
435 make_cleanup (xfree
, filename
);
436 exec_file_attach (filename
, from_tty
);
438 do_cleanups (cleanups
);
441 exec_file_attach (NULL
, from_tty
);
444 /* Set both the exec file and the symbol file, in one command.
445 What a novelty. Why did GDB go through four major releases before this
446 command was added? */
449 file_command (char *arg
, int from_tty
)
451 /* FIXME, if we lose on reading the symbol file, we should revert
452 the exec file, but that's rough. */
453 exec_file_command (arg
, from_tty
);
454 symbol_file_command (arg
, from_tty
);
455 if (deprecated_file_changed_hook
)
456 deprecated_file_changed_hook (arg
);
460 /* Locate all mappable sections of a BFD file.
461 table_pp_char is a char * to get it through bfd_map_over_sections;
462 we cast it back to its proper type. */
465 add_to_section_table (bfd
*abfd
, struct bfd_section
*asect
,
468 struct target_section
**table_pp
= (struct target_section
**) table_pp_char
;
471 gdb_assert (abfd
== asect
->owner
);
473 /* Check the section flags, but do not discard zero-length sections, since
474 some symbols may still be attached to this section. For instance, we
475 encountered on sparc-solaris 2.10 a shared library with an empty .bss
476 section to which a symbol named "_end" was attached. The address
477 of this symbol still needs to be relocated. */
478 aflag
= bfd_get_section_flags (abfd
, asect
);
479 if (!(aflag
& SEC_ALLOC
))
482 (*table_pp
)->owner
= NULL
;
483 (*table_pp
)->the_bfd_section
= asect
;
484 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
485 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
492 clear_section_table (struct target_section_table
*table
)
494 xfree (table
->sections
);
495 table
->sections
= table
->sections_end
= NULL
;
498 /* Resize section table TABLE by ADJUSTMENT.
499 ADJUSTMENT may be negative, in which case the caller must have already
500 removed the sections being deleted.
501 Returns the old size. */
504 resize_section_table (struct target_section_table
*table
, int adjustment
)
509 old_count
= table
->sections_end
- table
->sections
;
511 new_count
= adjustment
+ old_count
;
515 table
->sections
= XRESIZEVEC (struct target_section
, table
->sections
,
517 table
->sections_end
= table
->sections
+ new_count
;
520 clear_section_table (table
);
525 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
526 Returns 0 if OK, 1 on error. */
529 build_section_table (struct bfd
*some_bfd
, struct target_section
**start
,
530 struct target_section
**end
)
534 count
= bfd_count_sections (some_bfd
);
537 *start
= XNEWVEC (struct target_section
, count
);
539 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *) end
);
540 if (*end
> *start
+ count
)
541 internal_error (__FILE__
, __LINE__
,
542 _("failed internal consistency check"));
543 /* We could realloc the table, but it probably loses for most files. */
547 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
548 current set of target sections. */
551 add_target_sections (void *owner
,
552 struct target_section
*sections
,
553 struct target_section
*sections_end
)
556 struct target_section_table
*table
= current_target_sections
;
558 count
= sections_end
- sections
;
562 int space
= resize_section_table (table
, count
);
565 for (i
= 0; i
< count
; ++i
)
567 table
->sections
[space
+ i
] = sections
[i
];
568 table
->sections
[space
+ i
].owner
= owner
;
571 /* If these are the first file sections we can provide memory
572 from, push the file_stratum target. */
573 if (!target_is_pushed (&exec_ops
))
574 push_target (&exec_ops
);
578 /* Add the sections of OBJFILE to the current set of target sections. */
581 add_target_sections_of_objfile (struct objfile
*objfile
)
583 struct target_section_table
*table
= current_target_sections
;
584 struct obj_section
*osect
;
587 struct target_section
*ts
;
592 /* Compute the number of sections to add. */
593 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
595 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
603 space
= resize_section_table (table
, count
);
605 ts
= table
->sections
+ space
;
607 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
609 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
612 gdb_assert (ts
< table
->sections
+ space
+ count
);
614 ts
->addr
= obj_section_addr (osect
);
615 ts
->endaddr
= obj_section_endaddr (osect
);
616 ts
->the_bfd_section
= osect
->the_bfd_section
;
617 ts
->owner
= (void *) objfile
;
623 /* Remove all target sections owned by OWNER.
624 OWNER must be the same value passed to add_target_sections. */
627 remove_target_sections (void *owner
)
629 struct target_section
*src
, *dest
;
630 struct target_section_table
*table
= current_target_sections
;
632 gdb_assert (owner
!= NULL
);
634 dest
= table
->sections
;
635 for (src
= table
->sections
; src
< table
->sections_end
; src
++)
636 if (src
->owner
!= owner
)
638 /* Keep this section. */
644 /* If we've dropped any sections, resize the section table. */
649 old_count
= resize_section_table (table
, dest
- src
);
651 /* If we don't have any more sections to read memory from,
652 remove the file_stratum target from the stack. */
653 if (old_count
+ (dest
- src
) == 0)
655 struct program_space
*pspace
;
658 if (pspace
->target_sections
.sections
659 != pspace
->target_sections
.sections_end
)
662 unpush_target (&exec_ops
);
669 enum target_xfer_status
670 exec_read_partial_read_only (gdb_byte
*readbuf
, ULONGEST offset
,
671 ULONGEST len
, ULONGEST
*xfered_len
)
673 /* It's unduly pedantic to refuse to look at the executable for
674 read-only pieces; so do the equivalent of readonly regions aka
676 if (exec_bfd
!= NULL
)
682 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
684 if ((s
->flags
& SEC_LOAD
) == 0
685 || (s
->flags
& SEC_READONLY
) == 0)
689 size
= bfd_get_section_size (s
);
690 if (vma
<= offset
&& offset
< (vma
+ size
))
694 amt
= (vma
+ size
) - offset
;
698 amt
= bfd_get_section_contents (exec_bfd
, s
,
699 readbuf
, offset
- vma
, amt
);
702 return TARGET_XFER_EOF
;
706 return TARGET_XFER_OK
;
712 /* Indicate failure to find the requested memory block. */
713 return TARGET_XFER_E_IO
;
716 /* Appends all read-only memory ranges found in the target section
717 table defined by SECTIONS and SECTIONS_END, starting at (and
718 intersected with) MEMADDR for LEN bytes. Returns the augmented
721 static VEC(mem_range_s
) *
722 section_table_available_memory (VEC(mem_range_s
) *memory
,
723 CORE_ADDR memaddr
, ULONGEST len
,
724 struct target_section
*sections
,
725 struct target_section
*sections_end
)
727 struct target_section
*p
;
729 for (p
= sections
; p
< sections_end
; p
++)
731 if ((bfd_get_section_flags (p
->the_bfd_section
->owner
,
733 & SEC_READONLY
) == 0)
736 /* Copy the meta-data, adjusted. */
737 if (mem_ranges_overlap (p
->addr
, p
->endaddr
- p
->addr
, memaddr
, len
))
739 ULONGEST lo1
, hi1
, lo2
, hi2
;
748 r
= VEC_safe_push (mem_range_s
, memory
, NULL
);
750 r
->start
= std::max (lo1
, lo2
);
751 r
->length
= std::min (hi1
, hi2
) - r
->start
;
758 enum target_xfer_status
759 section_table_read_available_memory (gdb_byte
*readbuf
, ULONGEST offset
,
760 ULONGEST len
, ULONGEST
*xfered_len
)
762 VEC(mem_range_s
) *available_memory
= NULL
;
763 struct target_section_table
*table
;
764 struct cleanup
*old_chain
;
768 table
= target_get_section_table (&exec_ops
);
769 available_memory
= section_table_available_memory (available_memory
,
772 table
->sections_end
);
774 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
),
777 normalize_mem_ranges (available_memory
);
780 VEC_iterate (mem_range_s
, available_memory
, i
, r
);
783 if (mem_ranges_overlap (r
->start
, r
->length
, offset
, len
))
786 enum target_xfer_status status
;
788 /* Get the intersection window. */
789 end
= std::min
<CORE_ADDR
> (offset
+ len
, r
->start
+ r
->length
);
791 gdb_assert (end
- offset
<= len
);
793 if (offset
>= r
->start
)
794 status
= exec_read_partial_read_only (readbuf
, offset
,
799 *xfered_len
= r
->start
- offset
;
800 status
= TARGET_XFER_UNAVAILABLE
;
802 do_cleanups (old_chain
);
806 do_cleanups (old_chain
);
809 return TARGET_XFER_UNAVAILABLE
;
812 enum target_xfer_status
813 section_table_xfer_memory_partial (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
814 ULONGEST offset
, ULONGEST len
,
815 ULONGEST
*xfered_len
,
816 struct target_section
*sections
,
817 struct target_section
*sections_end
,
818 const char *section_name
)
821 struct target_section
*p
;
822 ULONGEST memaddr
= offset
;
823 ULONGEST memend
= memaddr
+ len
;
826 internal_error (__FILE__
, __LINE__
,
827 _("failed internal consistency check"));
829 for (p
= sections
; p
< sections_end
; p
++)
831 struct bfd_section
*asect
= p
->the_bfd_section
;
832 bfd
*abfd
= asect
->owner
;
834 if (section_name
&& strcmp (section_name
, asect
->name
) != 0)
835 continue; /* not the section we need. */
836 if (memaddr
>= p
->addr
)
838 if (memend
<= p
->endaddr
)
840 /* Entire transfer is within this section. */
842 res
= bfd_set_section_contents (abfd
, asect
,
843 writebuf
, memaddr
- p
->addr
,
846 res
= bfd_get_section_contents (abfd
, asect
,
847 readbuf
, memaddr
- p
->addr
,
853 return TARGET_XFER_OK
;
856 return TARGET_XFER_EOF
;
858 else if (memaddr
>= p
->endaddr
)
860 /* This section ends before the transfer starts. */
865 /* This section overlaps the transfer. Just do half. */
866 len
= p
->endaddr
- memaddr
;
868 res
= bfd_set_section_contents (abfd
, asect
,
869 writebuf
, memaddr
- p
->addr
,
872 res
= bfd_get_section_contents (abfd
, asect
,
873 readbuf
, memaddr
- p
->addr
,
878 return TARGET_XFER_OK
;
881 return TARGET_XFER_EOF
;
886 return TARGET_XFER_EOF
; /* We can't help. */
889 static struct target_section_table
*
890 exec_get_section_table (struct target_ops
*ops
)
892 return current_target_sections
;
895 static enum target_xfer_status
896 exec_xfer_partial (struct target_ops
*ops
, enum target_object object
,
897 const char *annex
, gdb_byte
*readbuf
,
898 const gdb_byte
*writebuf
,
899 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
901 struct target_section_table
*table
= target_get_section_table (ops
);
903 if (object
== TARGET_OBJECT_MEMORY
)
904 return section_table_xfer_memory_partial (readbuf
, writebuf
,
905 offset
, len
, xfered_len
,
910 return TARGET_XFER_E_IO
;
915 print_section_info (struct target_section_table
*t
, bfd
*abfd
)
917 struct gdbarch
*gdbarch
= gdbarch_from_bfd (abfd
);
918 struct target_section
*p
;
919 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
920 int wid
= gdbarch_addr_bit (gdbarch
) <= 32 ? 8 : 16;
922 printf_filtered ("\t`%s', ", bfd_get_filename (abfd
));
924 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd
));
925 if (abfd
== exec_bfd
)
927 /* gcc-3.4 does not like the initialization in
928 <p == t->sections_end>. */
929 bfd_vma displacement
= 0;
932 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
934 struct bfd_section
*psect
= p
->the_bfd_section
;
935 bfd
*pbfd
= psect
->owner
;
937 if ((bfd_get_section_flags (pbfd
, psect
) & (SEC_ALLOC
| SEC_LOAD
))
938 != (SEC_ALLOC
| SEC_LOAD
))
941 if (bfd_get_section_vma (pbfd
, psect
) <= abfd
->start_address
942 && abfd
->start_address
< (bfd_get_section_vma (pbfd
, psect
)
943 + bfd_get_section_size (psect
)))
945 displacement
= p
->addr
- bfd_get_section_vma (pbfd
, psect
);
949 if (p
== t
->sections_end
)
950 warning (_("Cannot find section for the entry point of %s."),
951 bfd_get_filename (abfd
));
953 entry_point
= gdbarch_addr_bits_remove (gdbarch
,
954 bfd_get_start_address (abfd
)
956 printf_filtered (_("\tEntry point: %s\n"),
957 paddress (gdbarch
, entry_point
));
959 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
961 struct bfd_section
*psect
= p
->the_bfd_section
;
962 bfd
*pbfd
= psect
->owner
;
964 printf_filtered ("\t%s", hex_string_custom (p
->addr
, wid
));
965 printf_filtered (" - %s", hex_string_custom (p
->endaddr
, wid
));
967 /* FIXME: A format of "08l" is not wide enough for file offsets
968 larger than 4GB. OTOH, making it "016l" isn't desirable either
969 since most output will then be much wider than necessary. It
970 may make sense to test the size of the file and choose the
971 format string accordingly. */
972 /* FIXME: i18n: Need to rewrite this sentence. */
974 printf_filtered (" @ %s",
975 hex_string_custom (psect
->filepos
, 8));
976 printf_filtered (" is %s", bfd_section_name (pbfd
, psect
));
978 printf_filtered (" in %s", bfd_get_filename (pbfd
));
979 printf_filtered ("\n");
984 exec_files_info (struct target_ops
*t
)
987 print_section_info (current_target_sections
, exec_bfd
);
989 puts_filtered (_("\t<no file loaded>\n"));
993 set_section_command (char *args
, int from_tty
)
995 struct target_section
*p
;
998 unsigned long secaddr
;
1001 struct target_section_table
*table
;
1004 error (_("Must specify section name and its virtual address"));
1006 /* Parse out section name. */
1007 for (secname
= args
; !isspace (*args
); args
++);
1008 seclen
= args
- secname
;
1010 /* Parse out new virtual address. */
1011 secaddr
= parse_and_eval_address (args
);
1013 table
= current_target_sections
;
1014 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1016 if (!strncmp (secname
, bfd_section_name (p
->bfd
,
1017 p
->the_bfd_section
), seclen
)
1018 && bfd_section_name (p
->bfd
, p
->the_bfd_section
)[seclen
] == '\0')
1020 offset
= secaddr
- p
->addr
;
1022 p
->endaddr
+= offset
;
1024 exec_files_info (&exec_ops
);
1028 if (seclen
>= sizeof (secprint
))
1029 seclen
= sizeof (secprint
) - 1;
1030 strncpy (secprint
, secname
, seclen
);
1031 secprint
[seclen
] = '\0';
1032 error (_("Section %s not found"), secprint
);
1035 /* If we can find a section in FILENAME with BFD index INDEX, adjust
1039 exec_set_section_address (const char *filename
, int index
, CORE_ADDR address
)
1041 struct target_section
*p
;
1042 struct target_section_table
*table
;
1044 table
= current_target_sections
;
1045 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1047 if (filename_cmp (filename
, p
->the_bfd_section
->owner
->filename
) == 0
1048 && index
== p
->the_bfd_section
->index
)
1050 p
->endaddr
+= address
- p
->addr
;
1056 /* If mourn is being called in all the right places, this could be say
1057 `gdb internal error' (since generic_mourn calls
1058 breakpoint_init_inferior). */
1061 ignore (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1062 struct bp_target_info
*bp_tgt
)
1067 /* Implement the to_remove_breakpoint method. */
1070 exec_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1071 struct bp_target_info
*bp_tgt
,
1072 enum remove_bp_reason reason
)
1078 exec_has_memory (struct target_ops
*ops
)
1080 /* We can provide memory if we have any file/target sections to read
1082 return (current_target_sections
->sections
1083 != current_target_sections
->sections_end
);
1087 exec_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
1089 error (_("Can't create a corefile"));
1092 /* Fill in the exec file target vector. Very few entries need to be
1096 init_exec_ops (void)
1098 exec_ops
.to_shortname
= "exec";
1099 exec_ops
.to_longname
= "Local exec file";
1100 exec_ops
.to_doc
= "Use an executable file as a target.\n\
1101 Specify the filename of the executable file.";
1102 exec_ops
.to_open
= exec_open
;
1103 exec_ops
.to_close
= exec_close_1
;
1104 exec_ops
.to_xfer_partial
= exec_xfer_partial
;
1105 exec_ops
.to_get_section_table
= exec_get_section_table
;
1106 exec_ops
.to_files_info
= exec_files_info
;
1107 exec_ops
.to_insert_breakpoint
= ignore
;
1108 exec_ops
.to_remove_breakpoint
= exec_remove_breakpoint
;
1109 exec_ops
.to_stratum
= file_stratum
;
1110 exec_ops
.to_has_memory
= exec_has_memory
;
1111 exec_ops
.to_make_corefile_notes
= exec_make_note_section
;
1112 exec_ops
.to_find_memory_regions
= objfile_find_memory_regions
;
1113 exec_ops
.to_magic
= OPS_MAGIC
;
1117 _initialize_exec (void)
1119 struct cmd_list_element
*c
;
1125 c
= add_cmd ("file", class_files
, file_command
, _("\
1126 Use FILE as program to be debugged.\n\
1127 It is read for its symbols, for getting the contents of pure memory,\n\
1128 and it is the program executed when you use the `run' command.\n\
1129 If FILE cannot be found as specified, your execution directory path\n\
1130 ($PATH) is searched for a command of that name.\n\
1131 No arg means to have no executable file and no symbols."), &cmdlist
);
1132 set_cmd_completer (c
, filename_completer
);
1135 c
= add_cmd ("exec-file", class_files
, exec_file_command
, _("\
1136 Use FILE as program for getting contents of pure memory.\n\
1137 If FILE cannot be found as specified, your execution directory path\n\
1138 is searched for a command of that name.\n\
1139 No arg means have no executable file."), &cmdlist
);
1140 set_cmd_completer (c
, filename_completer
);
1142 add_com ("section", class_files
, set_section_command
, _("\
1143 Change the base address of section SECTION of the exec file to ADDR.\n\
1144 This can be used if the exec file does not contain section addresses,\n\
1145 (such as in the a.out format), or when the addresses specified in the\n\
1146 file itself are wrong. Each section must be changed separately. The\n\
1147 ``info files'' command lists all the sections and their addresses."));
1149 add_setshow_boolean_cmd ("write", class_support
, &write_files
, _("\
1150 Set writing into executable and core files."), _("\
1151 Show writing into executable and core files."), NULL
,
1154 &setlist
, &showlist
);
1156 add_target_with_completer (&exec_ops
, filename_completer
);