1 /* Work with executable files, for GDB.
3 Copyright (C) 1988-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "filenames.h"
29 #include "completer.h"
33 #include "arch-utils.h"
34 #include "gdbthread.h"
35 #include "progspace.h"
40 #include "readline/readline.h"
48 void (*deprecated_file_changed_hook
) (char *);
50 /* Prototypes for local functions */
52 static void file_command (char *, int);
54 static void set_section_command (char *, int);
56 static void exec_files_info (struct target_ops
*);
58 static void init_exec_ops (void);
60 void _initialize_exec (void);
62 /* The target vector for executable files. */
64 static struct target_ops exec_ops
;
66 /* Whether to open exec and core files read-only or read-write. */
70 show_write_files (struct ui_file
*file
, int from_tty
,
71 struct cmd_list_element
*c
, const char *value
)
73 fprintf_filtered (file
, _("Writing into executable and core files is %s.\n"),
79 exec_open (const char *args
, int from_tty
)
81 target_preopen (from_tty
);
82 exec_file_attach (args
, from_tty
);
85 /* Close and clear exec_bfd. If we end up with no target sections to
86 read memory from, this unpushes the exec_ops target. */
97 /* Removing target sections may close the exec_ops target.
98 Clear exec_bfd before doing so to prevent recursion. */
102 remove_target_sections (&exec_bfd
);
104 xfree (exec_filename
);
105 exec_filename
= NULL
;
109 /* This is the target_close implementation. Clears all target
110 sections and closes all executable bfds from all program spaces. */
113 exec_close_1 (struct target_ops
*self
)
115 struct program_space
*ss
;
116 struct cleanup
*old_chain
;
118 old_chain
= save_current_program_space ();
121 set_current_program_space (ss
);
122 clear_section_table (current_target_sections
);
126 do_cleanups (old_chain
);
130 exec_file_clear (int from_tty
)
132 /* Remove exec file. */
136 printf_unfiltered (_("No executable file now.\n"));
139 /* Returns non-zero if exceptions E1 and E2 are equal. Returns zero
143 exception_print_same (struct gdb_exception e1
, struct gdb_exception e2
)
145 const char *msg1
= e1
.message
;
146 const char *msg2
= e2
.message
;
153 return (e1
.reason
== e2
.reason
154 && e1
.error
== e2
.error
155 && strcmp (e1
.message
, e2
.message
) == 0);
161 exec_file_locate_attach (int pid
, int from_tty
)
163 char *exec_file
, *full_exec_path
= NULL
;
164 struct cleanup
*old_chain
;
165 struct gdb_exception prev_err
= exception_none
;
167 /* Do nothing if we already have an executable filename. */
168 exec_file
= (char *) get_exec_file (0);
169 if (exec_file
!= NULL
)
172 /* Try to determine a filename from the process itself. */
173 exec_file
= target_pid_to_exec_file (pid
);
174 if (exec_file
== NULL
)
176 warning (_("No executable has been specified and target does not "
178 "determining executable automatically. "
179 "Try using the \"file\" command."));
183 /* If gdb_sysroot is not empty and the discovered filename
184 is absolute then prefix the filename with gdb_sysroot. */
185 if (*gdb_sysroot
!= '\0' && IS_ABSOLUTE_PATH (exec_file
))
187 full_exec_path
= exec_file_find (exec_file
, NULL
);
188 if (full_exec_path
== NULL
)
193 /* It's possible we don't have a full path, but rather just a
194 filename. Some targets, such as HP-UX, don't provide the
197 Attempt to qualify the filename against the source path.
198 (If that fails, we'll just fall back on the original
199 filename. Not much more we can do...) */
200 if (!source_full_path_of (exec_file
, &full_exec_path
))
201 full_exec_path
= xstrdup (exec_file
);
204 old_chain
= make_cleanup (xfree
, full_exec_path
);
205 make_cleanup (free_current_contents
, &prev_err
.message
);
207 /* exec_file_attach and symbol_file_add_main may throw an error if the file
208 cannot be opened either locally or remotely.
210 This happens for example, when the file is first found in the local
211 sysroot (above), and then disappears (a TOCTOU race), or when it doesn't
212 exist in the target filesystem, or when the file does exist, but
215 Even without a symbol file, the remote-based debugging session should
216 continue normally instead of ending abruptly. Hence we catch thrown
217 errors/exceptions in the following code. */
220 exec_file_attach (full_exec_path
, from_tty
);
222 CATCH (err
, RETURN_MASK_ERROR
)
224 if (err
.message
!= NULL
)
225 warning ("%s", err
.message
);
229 /* Save message so it doesn't get trashed by the catch below. */
230 prev_err
.message
= xstrdup (err
.message
);
236 symbol_file_add_main (full_exec_path
, from_tty
);
238 CATCH (err
, RETURN_MASK_ERROR
)
240 if (!exception_print_same (prev_err
, err
))
241 warning ("%s", err
.message
);
245 do_cleanups (old_chain
);
248 /* Set FILENAME as the new exec file.
250 This function is intended to be behave essentially the same
251 as exec_file_command, except that the latter will detect when
252 a target is being debugged, and will ask the user whether it
253 should be shut down first. (If the answer is "no", then the
254 new file is ignored.)
256 This file is used by exec_file_command, to do the work of opening
257 and processing the exec file after any prompting has happened.
259 And, it is used by child_attach, when the attach command was
260 given a pid but not a exec pathname, and the attach command could
261 figure out the pathname from the pid. (In this case, we shouldn't
262 ask the user whether the current target should be shut down --
263 we're supplying the exec pathname late for good reason.) */
266 exec_file_attach (const char *filename
, int from_tty
)
268 struct cleanup
*cleanups
;
270 /* First, acquire a reference to the current exec_bfd. We release
271 this at the end of the function; but acquiring it now lets the
272 BFD cache return it if this call refers to the same file. */
273 gdb_bfd_ref (exec_bfd
);
274 cleanups
= make_cleanup_bfd_unref (exec_bfd
);
276 /* Remove any previous exec file. */
279 /* Now open and digest the file the user requested, if any. */
284 printf_unfiltered (_("No executable file now.\n"));
286 set_gdbarch_from_file (NULL
);
290 int load_via_target
= 0;
291 char *scratch_pathname
, *canonical_pathname
;
293 struct target_section
*sections
= NULL
, *sections_end
= NULL
;
296 if (is_target_filename (filename
))
298 if (target_filesystem_is_local ())
299 filename
+= strlen (TARGET_SYSROOT_PREFIX
);
306 /* gdb_bfd_fopen does not support "target:" filenames. */
308 warning (_("writing into executable files is "
309 "not supported for %s sysroots"),
310 TARGET_SYSROOT_PREFIX
);
312 scratch_pathname
= xstrdup (filename
);
313 make_cleanup (xfree
, scratch_pathname
);
317 canonical_pathname
= scratch_pathname
;
321 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
322 filename
, write_files
?
323 O_RDWR
| O_BINARY
: O_RDONLY
| O_BINARY
,
325 #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
326 if (scratch_chan
< 0)
328 char *exename
= (char *) alloca (strlen (filename
) + 5);
330 strcat (strcpy (exename
, filename
), ".exe");
331 scratch_chan
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
,
332 exename
, write_files
?
334 : O_RDONLY
| O_BINARY
,
338 if (scratch_chan
< 0)
339 perror_with_name (filename
);
341 make_cleanup (xfree
, scratch_pathname
);
343 /* gdb_bfd_open (and its variants) prefers canonicalized
344 pathname for better BFD caching. */
345 canonical_pathname
= gdb_realpath (scratch_pathname
);
346 make_cleanup (xfree
, canonical_pathname
);
349 if (write_files
&& !load_via_target
)
350 exec_bfd
= gdb_bfd_fopen (canonical_pathname
, gnutarget
,
351 FOPEN_RUB
, scratch_chan
);
353 exec_bfd
= gdb_bfd_open (canonical_pathname
, gnutarget
, scratch_chan
);
357 error (_("\"%s\": could not open as an executable file: %s."),
358 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
361 /* gdb_realpath_keepfile resolves symlinks on the local
362 filesystem and so cannot be used for "target:" files. */
363 gdb_assert (exec_filename
== NULL
);
365 exec_filename
= xstrdup (bfd_get_filename (exec_bfd
));
367 exec_filename
= gdb_realpath_keepfile (scratch_pathname
);
369 if (!bfd_check_format_matches (exec_bfd
, bfd_object
, &matching
))
371 /* Make sure to close exec_bfd, or else "run" might try to use
374 error (_("\"%s\": not in executable format: %s"),
376 gdb_bfd_errmsg (bfd_get_error (), matching
));
379 if (build_section_table (exec_bfd
, §ions
, §ions_end
))
381 /* Make sure to close exec_bfd, or else "run" might try to use
384 error (_("\"%s\": can't find the file sections: %s"),
385 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
388 exec_bfd_mtime
= bfd_get_mtime (exec_bfd
);
392 set_gdbarch_from_file (exec_bfd
);
394 /* Add the executable's sections to the current address spaces'
395 list of sections. This possibly pushes the exec_ops
397 add_target_sections (&exec_bfd
, sections
, sections_end
);
400 /* Tell display code (if any) about the changed file name. */
401 if (deprecated_exec_file_display_hook
)
402 (*deprecated_exec_file_display_hook
) (filename
);
405 do_cleanups (cleanups
);
407 bfd_cache_close_all ();
408 observer_notify_executable_changed ();
411 /* Process the first arg in ARGS as the new exec file.
413 Note that we have to explicitly ignore additional args, since we can
414 be called from file_command(), which also calls symbol_file_command()
415 which can take multiple args.
417 If ARGS is NULL, we just want to close the exec file. */
420 exec_file_command (char *args
, int from_tty
)
425 if (from_tty
&& target_has_execution
426 && !query (_("A program is being debugged already.\n"
427 "Are you sure you want to change the file? ")))
428 error (_("File not changed."));
432 struct cleanup
*cleanups
;
434 /* Scan through the args and pick up the first non option arg
437 argv
= gdb_buildargv (args
);
438 cleanups
= make_cleanup_freeargv (argv
);
440 for (; (*argv
!= NULL
) && (**argv
== '-'); argv
++)
444 error (_("No executable file name was specified"));
446 filename
= tilde_expand (*argv
);
447 make_cleanup (xfree
, filename
);
448 exec_file_attach (filename
, from_tty
);
450 do_cleanups (cleanups
);
453 exec_file_attach (NULL
, from_tty
);
456 /* Set both the exec file and the symbol file, in one command.
457 What a novelty. Why did GDB go through four major releases before this
458 command was added? */
461 file_command (char *arg
, int from_tty
)
463 /* FIXME, if we lose on reading the symbol file, we should revert
464 the exec file, but that's rough. */
465 exec_file_command (arg
, from_tty
);
466 symbol_file_command (arg
, from_tty
);
467 if (deprecated_file_changed_hook
)
468 deprecated_file_changed_hook (arg
);
472 /* Locate all mappable sections of a BFD file.
473 table_pp_char is a char * to get it through bfd_map_over_sections;
474 we cast it back to its proper type. */
477 add_to_section_table (bfd
*abfd
, struct bfd_section
*asect
,
480 struct target_section
**table_pp
= (struct target_section
**) table_pp_char
;
483 gdb_assert (abfd
== asect
->owner
);
485 /* Check the section flags, but do not discard zero-length sections, since
486 some symbols may still be attached to this section. For instance, we
487 encountered on sparc-solaris 2.10 a shared library with an empty .bss
488 section to which a symbol named "_end" was attached. The address
489 of this symbol still needs to be relocated. */
490 aflag
= bfd_get_section_flags (abfd
, asect
);
491 if (!(aflag
& SEC_ALLOC
))
494 (*table_pp
)->owner
= NULL
;
495 (*table_pp
)->the_bfd_section
= asect
;
496 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
497 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
504 clear_section_table (struct target_section_table
*table
)
506 xfree (table
->sections
);
507 table
->sections
= table
->sections_end
= NULL
;
510 /* Resize section table TABLE by ADJUSTMENT.
511 ADJUSTMENT may be negative, in which case the caller must have already
512 removed the sections being deleted.
513 Returns the old size. */
516 resize_section_table (struct target_section_table
*table
, int adjustment
)
521 old_count
= table
->sections_end
- table
->sections
;
523 new_count
= adjustment
+ old_count
;
527 table
->sections
= XRESIZEVEC (struct target_section
, table
->sections
,
529 table
->sections_end
= table
->sections
+ new_count
;
532 clear_section_table (table
);
537 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
538 Returns 0 if OK, 1 on error. */
541 build_section_table (struct bfd
*some_bfd
, struct target_section
**start
,
542 struct target_section
**end
)
546 count
= bfd_count_sections (some_bfd
);
549 *start
= XNEWVEC (struct target_section
, count
);
551 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *) end
);
552 if (*end
> *start
+ count
)
553 internal_error (__FILE__
, __LINE__
,
554 _("failed internal consistency check"));
555 /* We could realloc the table, but it probably loses for most files. */
559 /* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
560 current set of target sections. */
563 add_target_sections (void *owner
,
564 struct target_section
*sections
,
565 struct target_section
*sections_end
)
568 struct target_section_table
*table
= current_target_sections
;
570 count
= sections_end
- sections
;
574 int space
= resize_section_table (table
, count
);
577 for (i
= 0; i
< count
; ++i
)
579 table
->sections
[space
+ i
] = sections
[i
];
580 table
->sections
[space
+ i
].owner
= owner
;
583 /* If these are the first file sections we can provide memory
584 from, push the file_stratum target. */
585 if (!target_is_pushed (&exec_ops
))
586 push_target (&exec_ops
);
590 /* Add the sections of OBJFILE to the current set of target sections. */
593 add_target_sections_of_objfile (struct objfile
*objfile
)
595 struct target_section_table
*table
= current_target_sections
;
596 struct obj_section
*osect
;
599 struct target_section
*ts
;
604 /* Compute the number of sections to add. */
605 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
607 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
615 space
= resize_section_table (table
, count
);
617 ts
= table
->sections
+ space
;
619 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
621 if (bfd_get_section_size (osect
->the_bfd_section
) == 0)
624 gdb_assert (ts
< table
->sections
+ space
+ count
);
626 ts
->addr
= obj_section_addr (osect
);
627 ts
->endaddr
= obj_section_endaddr (osect
);
628 ts
->the_bfd_section
= osect
->the_bfd_section
;
629 ts
->owner
= (void *) objfile
;
635 /* Remove all target sections owned by OWNER.
636 OWNER must be the same value passed to add_target_sections. */
639 remove_target_sections (void *owner
)
641 struct target_section
*src
, *dest
;
642 struct target_section_table
*table
= current_target_sections
;
644 gdb_assert (owner
!= NULL
);
646 dest
= table
->sections
;
647 for (src
= table
->sections
; src
< table
->sections_end
; src
++)
648 if (src
->owner
!= owner
)
650 /* Keep this section. */
656 /* If we've dropped any sections, resize the section table. */
661 old_count
= resize_section_table (table
, dest
- src
);
663 /* If we don't have any more sections to read memory from,
664 remove the file_stratum target from the stack. */
665 if (old_count
+ (dest
- src
) == 0)
667 struct program_space
*pspace
;
670 if (pspace
->target_sections
.sections
671 != pspace
->target_sections
.sections_end
)
674 unpush_target (&exec_ops
);
681 enum target_xfer_status
682 exec_read_partial_read_only (gdb_byte
*readbuf
, ULONGEST offset
,
683 ULONGEST len
, ULONGEST
*xfered_len
)
685 /* It's unduly pedantic to refuse to look at the executable for
686 read-only pieces; so do the equivalent of readonly regions aka
688 if (exec_bfd
!= NULL
)
694 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
696 if ((s
->flags
& SEC_LOAD
) == 0
697 || (s
->flags
& SEC_READONLY
) == 0)
701 size
= bfd_get_section_size (s
);
702 if (vma
<= offset
&& offset
< (vma
+ size
))
706 amt
= (vma
+ size
) - offset
;
710 amt
= bfd_get_section_contents (exec_bfd
, s
,
711 readbuf
, offset
- vma
, amt
);
714 return TARGET_XFER_EOF
;
718 return TARGET_XFER_OK
;
724 /* Indicate failure to find the requested memory block. */
725 return TARGET_XFER_E_IO
;
728 /* Appends all read-only memory ranges found in the target section
729 table defined by SECTIONS and SECTIONS_END, starting at (and
730 intersected with) MEMADDR for LEN bytes. Returns the augmented
733 static VEC(mem_range_s
) *
734 section_table_available_memory (VEC(mem_range_s
) *memory
,
735 CORE_ADDR memaddr
, ULONGEST len
,
736 struct target_section
*sections
,
737 struct target_section
*sections_end
)
739 struct target_section
*p
;
741 for (p
= sections
; p
< sections_end
; p
++)
743 if ((bfd_get_section_flags (p
->the_bfd_section
->owner
,
745 & SEC_READONLY
) == 0)
748 /* Copy the meta-data, adjusted. */
749 if (mem_ranges_overlap (p
->addr
, p
->endaddr
- p
->addr
, memaddr
, len
))
751 ULONGEST lo1
, hi1
, lo2
, hi2
;
760 r
= VEC_safe_push (mem_range_s
, memory
, NULL
);
762 r
->start
= std::max (lo1
, lo2
);
763 r
->length
= std::min (hi1
, hi2
) - r
->start
;
770 enum target_xfer_status
771 section_table_read_available_memory (gdb_byte
*readbuf
, ULONGEST offset
,
772 ULONGEST len
, ULONGEST
*xfered_len
)
774 VEC(mem_range_s
) *available_memory
= NULL
;
775 struct target_section_table
*table
;
776 struct cleanup
*old_chain
;
780 table
= target_get_section_table (&exec_ops
);
781 available_memory
= section_table_available_memory (available_memory
,
784 table
->sections_end
);
786 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
),
789 normalize_mem_ranges (available_memory
);
792 VEC_iterate (mem_range_s
, available_memory
, i
, r
);
795 if (mem_ranges_overlap (r
->start
, r
->length
, offset
, len
))
798 enum target_xfer_status status
;
800 /* Get the intersection window. */
801 end
= std::min
<CORE_ADDR
> (offset
+ len
, r
->start
+ r
->length
);
803 gdb_assert (end
- offset
<= len
);
805 if (offset
>= r
->start
)
806 status
= exec_read_partial_read_only (readbuf
, offset
,
811 *xfered_len
= r
->start
- offset
;
812 status
= TARGET_XFER_UNAVAILABLE
;
814 do_cleanups (old_chain
);
818 do_cleanups (old_chain
);
821 return TARGET_XFER_UNAVAILABLE
;
824 enum target_xfer_status
825 section_table_xfer_memory_partial (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
826 ULONGEST offset
, ULONGEST len
,
827 ULONGEST
*xfered_len
,
828 struct target_section
*sections
,
829 struct target_section
*sections_end
,
830 const char *section_name
)
833 struct target_section
*p
;
834 ULONGEST memaddr
= offset
;
835 ULONGEST memend
= memaddr
+ len
;
838 internal_error (__FILE__
, __LINE__
,
839 _("failed internal consistency check"));
841 for (p
= sections
; p
< sections_end
; p
++)
843 struct bfd_section
*asect
= p
->the_bfd_section
;
844 bfd
*abfd
= asect
->owner
;
846 if (section_name
&& strcmp (section_name
, asect
->name
) != 0)
847 continue; /* not the section we need. */
848 if (memaddr
>= p
->addr
)
850 if (memend
<= p
->endaddr
)
852 /* Entire transfer is within this section. */
854 res
= bfd_set_section_contents (abfd
, asect
,
855 writebuf
, memaddr
- p
->addr
,
858 res
= bfd_get_section_contents (abfd
, asect
,
859 readbuf
, memaddr
- p
->addr
,
865 return TARGET_XFER_OK
;
868 return TARGET_XFER_EOF
;
870 else if (memaddr
>= p
->endaddr
)
872 /* This section ends before the transfer starts. */
877 /* This section overlaps the transfer. Just do half. */
878 len
= p
->endaddr
- memaddr
;
880 res
= bfd_set_section_contents (abfd
, asect
,
881 writebuf
, memaddr
- p
->addr
,
884 res
= bfd_get_section_contents (abfd
, asect
,
885 readbuf
, memaddr
- p
->addr
,
890 return TARGET_XFER_OK
;
893 return TARGET_XFER_EOF
;
898 return TARGET_XFER_EOF
; /* We can't help. */
901 static struct target_section_table
*
902 exec_get_section_table (struct target_ops
*ops
)
904 return current_target_sections
;
907 static enum target_xfer_status
908 exec_xfer_partial (struct target_ops
*ops
, enum target_object object
,
909 const char *annex
, gdb_byte
*readbuf
,
910 const gdb_byte
*writebuf
,
911 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
913 struct target_section_table
*table
= target_get_section_table (ops
);
915 if (object
== TARGET_OBJECT_MEMORY
)
916 return section_table_xfer_memory_partial (readbuf
, writebuf
,
917 offset
, len
, xfered_len
,
922 return TARGET_XFER_E_IO
;
927 print_section_info (struct target_section_table
*t
, bfd
*abfd
)
929 struct gdbarch
*gdbarch
= gdbarch_from_bfd (abfd
);
930 struct target_section
*p
;
931 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
932 int wid
= gdbarch_addr_bit (gdbarch
) <= 32 ? 8 : 16;
934 printf_filtered ("\t`%s', ", bfd_get_filename (abfd
));
936 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd
));
937 if (abfd
== exec_bfd
)
939 /* gcc-3.4 does not like the initialization in
940 <p == t->sections_end>. */
941 bfd_vma displacement
= 0;
944 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
946 struct bfd_section
*psect
= p
->the_bfd_section
;
947 bfd
*pbfd
= psect
->owner
;
949 if ((bfd_get_section_flags (pbfd
, psect
) & (SEC_ALLOC
| SEC_LOAD
))
950 != (SEC_ALLOC
| SEC_LOAD
))
953 if (bfd_get_section_vma (pbfd
, psect
) <= abfd
->start_address
954 && abfd
->start_address
< (bfd_get_section_vma (pbfd
, psect
)
955 + bfd_get_section_size (psect
)))
957 displacement
= p
->addr
- bfd_get_section_vma (pbfd
, psect
);
961 if (p
== t
->sections_end
)
962 warning (_("Cannot find section for the entry point of %s."),
963 bfd_get_filename (abfd
));
965 entry_point
= gdbarch_addr_bits_remove (gdbarch
,
966 bfd_get_start_address (abfd
)
968 printf_filtered (_("\tEntry point: %s\n"),
969 paddress (gdbarch
, entry_point
));
971 for (p
= t
->sections
; p
< t
->sections_end
; p
++)
973 struct bfd_section
*psect
= p
->the_bfd_section
;
974 bfd
*pbfd
= psect
->owner
;
976 printf_filtered ("\t%s", hex_string_custom (p
->addr
, wid
));
977 printf_filtered (" - %s", hex_string_custom (p
->endaddr
, wid
));
979 /* FIXME: A format of "08l" is not wide enough for file offsets
980 larger than 4GB. OTOH, making it "016l" isn't desirable either
981 since most output will then be much wider than necessary. It
982 may make sense to test the size of the file and choose the
983 format string accordingly. */
984 /* FIXME: i18n: Need to rewrite this sentence. */
986 printf_filtered (" @ %s",
987 hex_string_custom (psect
->filepos
, 8));
988 printf_filtered (" is %s", bfd_section_name (pbfd
, psect
));
990 printf_filtered (" in %s", bfd_get_filename (pbfd
));
991 printf_filtered ("\n");
996 exec_files_info (struct target_ops
*t
)
999 print_section_info (current_target_sections
, exec_bfd
);
1001 puts_filtered (_("\t<no file loaded>\n"));
1005 set_section_command (char *args
, int from_tty
)
1007 struct target_section
*p
;
1010 unsigned long secaddr
;
1013 struct target_section_table
*table
;
1016 error (_("Must specify section name and its virtual address"));
1018 /* Parse out section name. */
1019 for (secname
= args
; !isspace (*args
); args
++);
1020 seclen
= args
- secname
;
1022 /* Parse out new virtual address. */
1023 secaddr
= parse_and_eval_address (args
);
1025 table
= current_target_sections
;
1026 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1028 if (!strncmp (secname
, bfd_section_name (p
->bfd
,
1029 p
->the_bfd_section
), seclen
)
1030 && bfd_section_name (p
->bfd
, p
->the_bfd_section
)[seclen
] == '\0')
1032 offset
= secaddr
- p
->addr
;
1034 p
->endaddr
+= offset
;
1036 exec_files_info (&exec_ops
);
1040 if (seclen
>= sizeof (secprint
))
1041 seclen
= sizeof (secprint
) - 1;
1042 strncpy (secprint
, secname
, seclen
);
1043 secprint
[seclen
] = '\0';
1044 error (_("Section %s not found"), secprint
);
1047 /* If we can find a section in FILENAME with BFD index INDEX, adjust
1051 exec_set_section_address (const char *filename
, int index
, CORE_ADDR address
)
1053 struct target_section
*p
;
1054 struct target_section_table
*table
;
1056 table
= current_target_sections
;
1057 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1059 if (filename_cmp (filename
, p
->the_bfd_section
->owner
->filename
) == 0
1060 && index
== p
->the_bfd_section
->index
)
1062 p
->endaddr
+= address
- p
->addr
;
1068 /* If mourn is being called in all the right places, this could be say
1069 `gdb internal error' (since generic_mourn calls
1070 breakpoint_init_inferior). */
1073 ignore (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1074 struct bp_target_info
*bp_tgt
)
1079 /* Implement the to_remove_breakpoint method. */
1082 exec_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
1083 struct bp_target_info
*bp_tgt
,
1084 enum remove_bp_reason reason
)
1090 exec_has_memory (struct target_ops
*ops
)
1092 /* We can provide memory if we have any file/target sections to read
1094 return (current_target_sections
->sections
1095 != current_target_sections
->sections_end
);
1099 exec_make_note_section (struct target_ops
*self
, bfd
*obfd
, int *note_size
)
1101 error (_("Can't create a corefile"));
1104 /* Fill in the exec file target vector. Very few entries need to be
1108 init_exec_ops (void)
1110 exec_ops
.to_shortname
= "exec";
1111 exec_ops
.to_longname
= "Local exec file";
1112 exec_ops
.to_doc
= "Use an executable file as a target.\n\
1113 Specify the filename of the executable file.";
1114 exec_ops
.to_open
= exec_open
;
1115 exec_ops
.to_close
= exec_close_1
;
1116 exec_ops
.to_xfer_partial
= exec_xfer_partial
;
1117 exec_ops
.to_get_section_table
= exec_get_section_table
;
1118 exec_ops
.to_files_info
= exec_files_info
;
1119 exec_ops
.to_insert_breakpoint
= ignore
;
1120 exec_ops
.to_remove_breakpoint
= exec_remove_breakpoint
;
1121 exec_ops
.to_stratum
= file_stratum
;
1122 exec_ops
.to_has_memory
= exec_has_memory
;
1123 exec_ops
.to_make_corefile_notes
= exec_make_note_section
;
1124 exec_ops
.to_find_memory_regions
= objfile_find_memory_regions
;
1125 exec_ops
.to_magic
= OPS_MAGIC
;
1129 _initialize_exec (void)
1131 struct cmd_list_element
*c
;
1137 c
= add_cmd ("file", class_files
, file_command
, _("\
1138 Use FILE as program to be debugged.\n\
1139 It is read for its symbols, for getting the contents of pure memory,\n\
1140 and it is the program executed when you use the `run' command.\n\
1141 If FILE cannot be found as specified, your execution directory path\n\
1142 ($PATH) is searched for a command of that name.\n\
1143 No arg means to have no executable file and no symbols."), &cmdlist
);
1144 set_cmd_completer (c
, filename_completer
);
1147 c
= add_cmd ("exec-file", class_files
, exec_file_command
, _("\
1148 Use FILE as program for getting contents of pure memory.\n\
1149 If FILE cannot be found as specified, your execution directory path\n\
1150 is searched for a command of that name.\n\
1151 No arg means have no executable file."), &cmdlist
);
1152 set_cmd_completer (c
, filename_completer
);
1154 add_com ("section", class_files
, set_section_command
, _("\
1155 Change the base address of section SECTION of the exec file to ADDR.\n\
1156 This can be used if the exec file does not contain section addresses,\n\
1157 (such as in the a.out format), or when the addresses specified in the\n\
1158 file itself are wrong. Each section must be changed separately. The\n\
1159 ``info files'' command lists all the sections and their addresses."));
1161 add_setshow_boolean_cmd ("write", class_support
, &write_files
, _("\
1162 Set writing into executable and core files."), _("\
1163 Show writing into executable and core files."), NULL
,
1166 &setlist
, &showlist
);
1168 add_target_with_completer (&exec_ops
, filename_completer
);