b74845da58
* symfile.h (free_named_symtabs): Delete declaration.
* symfile.c: Remove some commented out code (clear_symtab_users_once).
(cashier_psymtab): Comment function out.
Delete declaration.
(free_named_symtabs): Delete.
* coffread.c (coff_end_symtab): Remove call to free_named_symtabs.
* dbxread.c (end_psymtab): Likewise.
* dwarf2read.c (process_psymtab_comp_unit): Ditto.
* exec.c (exec_close_1): Ditto.
* xcoffread.c (xcoff_end_psymtab): Likewise.
919 lines
25 KiB
C
919 lines
25 KiB
C
/* Work with executable files, for GDB.
|
||
|
||
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, 2009, 2010
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
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||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
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|
||
#include "defs.h"
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||
#include "frame.h"
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||
#include "inferior.h"
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||
#include "target.h"
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#include "gdbcmd.h"
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#include "language.h"
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#include "symfile.h"
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||
#include "objfiles.h"
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||
#include "completer.h"
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||
#include "value.h"
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||
#include "exec.h"
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||
#include "observer.h"
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||
#include "arch-utils.h"
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||
#include "gdbthread.h"
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#include "progspace.h"
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#include <fcntl.h>
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#include "readline/readline.h"
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#include "gdb_string.h"
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#include "gdbcore.h"
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#include <ctype.h>
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#include "gdb_stat.h"
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#include "xcoffsolib.h"
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struct vmap *map_vmap (bfd *, bfd *);
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void (*deprecated_file_changed_hook) (char *);
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/* Prototypes for local functions */
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static void file_command (char *, int);
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static void set_section_command (char *, int);
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static void exec_files_info (struct target_ops *);
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static void init_exec_ops (void);
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void _initialize_exec (void);
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/* The target vector for executable files. */
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struct target_ops exec_ops;
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/* True if the exec target is pushed on the stack. */
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static int using_exec_ops;
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/* Whether to open exec and core files read-only or read-write. */
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int write_files = 0;
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static void
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show_write_files (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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||
{
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fprintf_filtered (file, _("Writing into executable and core files is %s.\n"),
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value);
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}
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struct vmap *vmap;
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static void
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exec_open (char *args, int from_tty)
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{
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target_preopen (from_tty);
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exec_file_attach (args, from_tty);
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}
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/* Close and clear exec_bfd. If we end up with no target sections to
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read memory from, this unpushes the exec_ops target. */
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void
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exec_close (void)
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{
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if (exec_bfd)
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{
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bfd *abfd = exec_bfd;
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char *name = bfd_get_filename (abfd);
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if (!bfd_close (abfd))
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warning (_("cannot close \"%s\": %s"),
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name, bfd_errmsg (bfd_get_error ()));
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xfree (name);
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/* Removing target sections may close the exec_ops target.
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Clear exec_bfd before doing so to prevent recursion. */
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exec_bfd = NULL;
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exec_bfd_mtime = 0;
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remove_target_sections (abfd);
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}
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}
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/* This is the target_close implementation. Clears all target
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sections and closes all executable bfds from all program spaces. */
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static void
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exec_close_1 (int quitting)
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{
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int need_symtab_cleanup = 0;
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struct vmap *vp, *nxt;
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using_exec_ops = 0;
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for (nxt = vmap; nxt != NULL;)
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{
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vp = nxt;
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nxt = vp->nxt;
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/* if there is an objfile associated with this bfd,
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free_objfile() will do proper cleanup of objfile *and* bfd. */
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if (vp->objfile)
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{
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free_objfile (vp->objfile);
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need_symtab_cleanup = 1;
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}
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else if (vp->bfd != exec_bfd)
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/* FIXME-leak: We should be freeing vp->name too, I think. */
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if (!bfd_close (vp->bfd))
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warning (_("cannot close \"%s\": %s"),
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vp->name, bfd_errmsg (bfd_get_error ()));
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xfree (vp);
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}
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vmap = NULL;
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{
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struct program_space *ss;
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struct cleanup *old_chain;
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old_chain = save_current_program_space ();
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ALL_PSPACES (ss)
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{
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set_current_program_space (ss);
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/* Delete all target sections. */
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resize_section_table
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(current_target_sections,
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-resize_section_table (current_target_sections, 0));
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exec_close ();
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}
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do_cleanups (old_chain);
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}
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}
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void
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exec_file_clear (int from_tty)
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{
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/* Remove exec file. */
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exec_close ();
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if (from_tty)
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printf_unfiltered (_("No executable file now.\n"));
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}
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/* Set FILENAME as the new exec file.
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This function is intended to be behave essentially the same
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as exec_file_command, except that the latter will detect when
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a target is being debugged, and will ask the user whether it
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should be shut down first. (If the answer is "no", then the
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new file is ignored.)
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This file is used by exec_file_command, to do the work of opening
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and processing the exec file after any prompting has happened.
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And, it is used by child_attach, when the attach command was
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given a pid but not a exec pathname, and the attach command could
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figure out the pathname from the pid. (In this case, we shouldn't
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ask the user whether the current target should be shut down --
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we're supplying the exec pathname late for good reason.) */
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void
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exec_file_attach (char *filename, int from_tty)
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{
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/* Remove any previous exec file. */
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exec_close ();
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/* Now open and digest the file the user requested, if any. */
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if (!filename)
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{
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if (from_tty)
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printf_unfiltered (_("No executable file now.\n"));
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set_gdbarch_from_file (NULL);
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}
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else
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{
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struct cleanup *cleanups;
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char *scratch_pathname;
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int scratch_chan;
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struct target_section *sections = NULL, *sections_end = NULL;
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scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename,
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write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
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&scratch_pathname);
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#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
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if (scratch_chan < 0)
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{
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char *exename = alloca (strlen (filename) + 5);
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strcat (strcpy (exename, filename), ".exe");
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scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
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write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
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&scratch_pathname);
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}
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#endif
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if (scratch_chan < 0)
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perror_with_name (filename);
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exec_bfd = bfd_fopen (scratch_pathname, gnutarget,
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write_files ? FOPEN_RUB : FOPEN_RB,
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scratch_chan);
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if (!exec_bfd)
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{
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close (scratch_chan);
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error (_("\"%s\": could not open as an executable file: %s"),
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scratch_pathname, bfd_errmsg (bfd_get_error ()));
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}
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/* At this point, scratch_pathname and exec_bfd->name both point to the
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same malloc'd string. However exec_close() will attempt to free it
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via the exec_bfd->name pointer, so we need to make another copy and
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leave exec_bfd as the new owner of the original copy. */
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scratch_pathname = xstrdup (scratch_pathname);
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cleanups = make_cleanup (xfree, scratch_pathname);
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if (!bfd_check_format (exec_bfd, bfd_object))
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{
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/* Make sure to close exec_bfd, or else "run" might try to use
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it. */
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exec_close ();
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error (_("\"%s\": not in executable format: %s"),
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scratch_pathname, bfd_errmsg (bfd_get_error ()));
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}
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/* FIXME - This should only be run for RS6000, but the ifdef is a poor
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way to accomplish. */
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#ifdef DEPRECATED_IBM6000_TARGET
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/* Setup initial vmap. */
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map_vmap (exec_bfd, 0);
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if (vmap == NULL)
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{
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/* Make sure to close exec_bfd, or else "run" might try to use
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it. */
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exec_close ();
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error (_("\"%s\": can't find the file sections: %s"),
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scratch_pathname, bfd_errmsg (bfd_get_error ()));
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}
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#endif /* DEPRECATED_IBM6000_TARGET */
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if (build_section_table (exec_bfd, §ions, §ions_end))
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{
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/* Make sure to close exec_bfd, or else "run" might try to use
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it. */
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exec_close ();
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error (_("\"%s\": can't find the file sections: %s"),
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scratch_pathname, bfd_errmsg (bfd_get_error ()));
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}
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exec_bfd_mtime = bfd_get_mtime (exec_bfd);
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validate_files ();
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set_gdbarch_from_file (exec_bfd);
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/* Add the executable's sections to the current address spaces'
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list of sections. This possibly pushes the exec_ops
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target. */
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add_target_sections (sections, sections_end);
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xfree (sections);
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/* Tell display code (if any) about the changed file name. */
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if (deprecated_exec_file_display_hook)
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(*deprecated_exec_file_display_hook) (filename);
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do_cleanups (cleanups);
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}
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bfd_cache_close_all ();
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observer_notify_executable_changed ();
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}
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/* Process the first arg in ARGS as the new exec file.
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Note that we have to explicitly ignore additional args, since we can
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be called from file_command(), which also calls symbol_file_command()
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which can take multiple args.
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If ARGS is NULL, we just want to close the exec file. */
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static void
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exec_file_command (char *args, int from_tty)
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{
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char **argv;
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char *filename;
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if (from_tty && target_has_execution
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&& !query (_("A program is being debugged already.\n"
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"Are you sure you want to change the file? ")))
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error (_("File not changed."));
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if (args)
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{
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struct cleanup *cleanups;
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/* Scan through the args and pick up the first non option arg
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as the filename. */
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argv = gdb_buildargv (args);
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cleanups = make_cleanup_freeargv (argv);
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for (; (*argv != NULL) && (**argv == '-'); argv++)
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{;
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}
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if (*argv == NULL)
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error (_("No executable file name was specified"));
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filename = tilde_expand (*argv);
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make_cleanup (xfree, filename);
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exec_file_attach (filename, from_tty);
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do_cleanups (cleanups);
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}
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else
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exec_file_attach (NULL, from_tty);
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}
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||
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/* Set both the exec file and the symbol file, in one command.
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What a novelty. Why did GDB go through four major releases before this
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||
command was added? */
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||
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static void
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||
file_command (char *arg, int from_tty)
|
||
{
|
||
/* FIXME, if we lose on reading the symbol file, we should revert
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the exec file, but that's rough. */
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exec_file_command (arg, from_tty);
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symbol_file_command (arg, from_tty);
|
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if (deprecated_file_changed_hook)
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deprecated_file_changed_hook (arg);
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||
}
|
||
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||
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||
/* Locate all mappable sections of a BFD file.
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table_pp_char is a char * to get it through bfd_map_over_sections;
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we cast it back to its proper type. */
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||
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||
static void
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||
add_to_section_table (bfd *abfd, struct bfd_section *asect,
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void *table_pp_char)
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||
{
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||
struct target_section **table_pp = (struct target_section **) table_pp_char;
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flagword aflag;
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||
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/* Check the section flags, but do not discard zero-length sections, since
|
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some symbols may still be attached to this section. For instance, we
|
||
encountered on sparc-solaris 2.10 a shared library with an empty .bss
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||
section to which a symbol named "_end" was attached. The address
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||
of this symbol still needs to be relocated. */
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aflag = bfd_get_section_flags (abfd, asect);
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||
if (!(aflag & SEC_ALLOC))
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return;
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||
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(*table_pp)->bfd = abfd;
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(*table_pp)->the_bfd_section = asect;
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(*table_pp)->addr = bfd_section_vma (abfd, asect);
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||
(*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
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(*table_pp)++;
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||
}
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||
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||
int
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resize_section_table (struct target_section_table *table, int num_added)
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||
{
|
||
struct target_section *old_value;
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||
int old_count;
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||
int new_count;
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||
old_value = table->sections;
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old_count = table->sections_end - table->sections;
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||
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new_count = num_added + old_count;
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||
|
||
if (new_count)
|
||
{
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||
table->sections = xrealloc (table->sections,
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||
sizeof (struct target_section) * new_count);
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||
table->sections_end = table->sections + new_count;
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||
}
|
||
else
|
||
{
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||
xfree (table->sections);
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||
table->sections = table->sections_end = NULL;
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||
}
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||
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||
return old_count;
|
||
}
|
||
|
||
/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
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||
Returns 0 if OK, 1 on error. */
|
||
|
||
int
|
||
build_section_table (struct bfd *some_bfd, struct target_section **start,
|
||
struct target_section **end)
|
||
{
|
||
unsigned count;
|
||
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||
count = bfd_count_sections (some_bfd);
|
||
if (*start)
|
||
xfree (* start);
|
||
*start = (struct target_section *) xmalloc (count * sizeof (**start));
|
||
*end = *start;
|
||
bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
|
||
if (*end > *start + count)
|
||
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
|
||
/* We could realloc the table, but it probably loses for most files. */
|
||
return 0;
|
||
}
|
||
|
||
/* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
|
||
current set of target sections. */
|
||
|
||
void
|
||
add_target_sections (struct target_section *sections,
|
||
struct target_section *sections_end)
|
||
{
|
||
int count;
|
||
struct target_section_table *table = current_target_sections;
|
||
|
||
count = sections_end - sections;
|
||
|
||
if (count > 0)
|
||
{
|
||
int space = resize_section_table (table, count);
|
||
memcpy (table->sections + space,
|
||
sections, count * sizeof (sections[0]));
|
||
|
||
/* If these are the first file sections we can provide memory
|
||
from, push the file_stratum target. */
|
||
if (!using_exec_ops)
|
||
{
|
||
using_exec_ops = 1;
|
||
push_target (&exec_ops);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Remove all target sections taken from ABFD. */
|
||
|
||
void
|
||
remove_target_sections (bfd *abfd)
|
||
{
|
||
struct target_section *src, *dest;
|
||
|
||
struct target_section_table *table = current_target_sections;
|
||
|
||
dest = table->sections;
|
||
for (src = table->sections; src < table->sections_end; src++)
|
||
if (src->bfd != abfd)
|
||
{
|
||
/* Keep this section. */
|
||
if (dest < src)
|
||
*dest = *src;
|
||
dest++;
|
||
}
|
||
|
||
/* If we've dropped any sections, resize the section table. */
|
||
if (dest < src)
|
||
{
|
||
int old_count;
|
||
|
||
old_count = resize_section_table (table, dest - src);
|
||
|
||
/* If we don't have any more sections to read memory from,
|
||
remove the file_stratum target from the stack. */
|
||
if (old_count + (dest - src) == 0)
|
||
{
|
||
struct program_space *pspace;
|
||
|
||
ALL_PSPACES (pspace)
|
||
if (pspace->target_sections.sections
|
||
!= pspace->target_sections.sections_end)
|
||
return;
|
||
|
||
unpush_target (&exec_ops);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3)
|
||
{
|
||
struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3;
|
||
struct vmap *vp;
|
||
|
||
vp = vmap_bfd->pvmap;
|
||
|
||
if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0)
|
||
return;
|
||
|
||
if (strcmp (bfd_section_name (abfd, sect), ".text") == 0)
|
||
{
|
||
vp->tstart = bfd_section_vma (abfd, sect);
|
||
vp->tend = vp->tstart + bfd_section_size (abfd, sect);
|
||
vp->tvma = bfd_section_vma (abfd, sect);
|
||
vp->toffs = sect->filepos;
|
||
}
|
||
else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0)
|
||
{
|
||
vp->dstart = bfd_section_vma (abfd, sect);
|
||
vp->dend = vp->dstart + bfd_section_size (abfd, sect);
|
||
vp->dvma = bfd_section_vma (abfd, sect);
|
||
}
|
||
/* Silently ignore other types of sections. (FIXME?) */
|
||
}
|
||
|
||
/* Make a vmap for ABFD which might be a member of the archive ARCH.
|
||
Return the new vmap. */
|
||
|
||
struct vmap *
|
||
map_vmap (bfd *abfd, bfd *arch)
|
||
{
|
||
struct vmap_and_bfd vmap_bfd;
|
||
struct vmap *vp, **vpp;
|
||
|
||
vp = (struct vmap *) xmalloc (sizeof (*vp));
|
||
memset ((char *) vp, '\0', sizeof (*vp));
|
||
vp->nxt = 0;
|
||
vp->bfd = abfd;
|
||
vp->name = bfd_get_filename (arch ? arch : abfd);
|
||
vp->member = arch ? bfd_get_filename (abfd) : "";
|
||
|
||
vmap_bfd.pbfd = arch;
|
||
vmap_bfd.pvmap = vp;
|
||
bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd);
|
||
|
||
/* Find the end of the list and append. */
|
||
for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
|
||
;
|
||
*vpp = vp;
|
||
|
||
return vp;
|
||
}
|
||
|
||
|
||
int
|
||
section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
|
||
ULONGEST offset, LONGEST len,
|
||
struct target_section *sections,
|
||
struct target_section *sections_end,
|
||
const char *section_name)
|
||
{
|
||
int res;
|
||
struct target_section *p;
|
||
ULONGEST memaddr = offset;
|
||
ULONGEST memend = memaddr + len;
|
||
|
||
if (len <= 0)
|
||
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
|
||
|
||
for (p = sections; p < sections_end; p++)
|
||
{
|
||
if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0)
|
||
continue; /* not the section we need */
|
||
if (memaddr >= p->addr)
|
||
{
|
||
if (memend <= p->endaddr)
|
||
{
|
||
/* Entire transfer is within this section. */
|
||
if (writebuf)
|
||
res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
|
||
writebuf, memaddr - p->addr,
|
||
len);
|
||
else
|
||
res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
|
||
readbuf, memaddr - p->addr,
|
||
len);
|
||
return (res != 0) ? len : 0;
|
||
}
|
||
else if (memaddr >= p->endaddr)
|
||
{
|
||
/* This section ends before the transfer starts. */
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
/* This section overlaps the transfer. Just do half. */
|
||
len = p->endaddr - memaddr;
|
||
if (writebuf)
|
||
res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
|
||
writebuf, memaddr - p->addr,
|
||
len);
|
||
else
|
||
res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
|
||
readbuf, memaddr - p->addr,
|
||
len);
|
||
return (res != 0) ? len : 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
return 0; /* We can't help */
|
||
}
|
||
|
||
struct target_section_table *
|
||
exec_get_section_table (struct target_ops *ops)
|
||
{
|
||
return current_target_sections;
|
||
}
|
||
|
||
static LONGEST
|
||
exec_xfer_partial (struct target_ops *ops, enum target_object object,
|
||
const char *annex, gdb_byte *readbuf,
|
||
const gdb_byte *writebuf,
|
||
ULONGEST offset, LONGEST len)
|
||
{
|
||
struct target_section_table *table = target_get_section_table (ops);
|
||
|
||
if (object == TARGET_OBJECT_MEMORY)
|
||
return section_table_xfer_memory_partial (readbuf, writebuf,
|
||
offset, len,
|
||
table->sections,
|
||
table->sections_end,
|
||
NULL);
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
|
||
void
|
||
print_section_info (struct target_section_table *t, bfd *abfd)
|
||
{
|
||
struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
|
||
struct target_section *p;
|
||
/* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
|
||
int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16;
|
||
|
||
printf_filtered ("\t`%s', ", bfd_get_filename (abfd));
|
||
wrap_here (" ");
|
||
printf_filtered (_("file type %s.\n"), bfd_get_target (abfd));
|
||
if (abfd == exec_bfd)
|
||
{
|
||
/* gcc-3.4 does not like the initialization in <p == t->sections_end>. */
|
||
bfd_vma displacement = 0;
|
||
|
||
for (p = t->sections; p < t->sections_end; p++)
|
||
{
|
||
asection *asect = p->the_bfd_section;
|
||
|
||
if ((bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD))
|
||
!= (SEC_ALLOC | SEC_LOAD))
|
||
continue;
|
||
|
||
if (bfd_get_section_vma (abfd, asect) <= abfd->start_address
|
||
&& abfd->start_address < (bfd_get_section_vma (abfd, asect)
|
||
+ bfd_get_section_size (asect)))
|
||
{
|
||
displacement = p->addr - bfd_get_section_vma (abfd, asect);
|
||
break;
|
||
}
|
||
}
|
||
if (p == t->sections_end)
|
||
warning (_("Cannot find section for the entry point of %s.\n"),
|
||
bfd_get_filename (abfd));
|
||
|
||
printf_filtered (_("\tEntry point: %s\n"),
|
||
paddress (gdbarch, (bfd_get_start_address (abfd)
|
||
+ displacement)));
|
||
}
|
||
for (p = t->sections; p < t->sections_end; p++)
|
||
{
|
||
printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
|
||
printf_filtered (" - %s", hex_string_custom (p->endaddr, wid));
|
||
|
||
/* FIXME: A format of "08l" is not wide enough for file offsets
|
||
larger than 4GB. OTOH, making it "016l" isn't desirable either
|
||
since most output will then be much wider than necessary. It
|
||
may make sense to test the size of the file and choose the
|
||
format string accordingly. */
|
||
/* FIXME: i18n: Need to rewrite this sentence. */
|
||
if (info_verbose)
|
||
printf_filtered (" @ %s",
|
||
hex_string_custom (p->the_bfd_section->filepos, 8));
|
||
printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section));
|
||
if (p->bfd != abfd)
|
||
printf_filtered (" in %s", bfd_get_filename (p->bfd));
|
||
printf_filtered ("\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
exec_files_info (struct target_ops *t)
|
||
{
|
||
print_section_info (current_target_sections, exec_bfd);
|
||
|
||
if (vmap)
|
||
{
|
||
int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
|
||
struct vmap *vp;
|
||
|
||
printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name);
|
||
printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n",
|
||
addr_size * 2, "tstart",
|
||
addr_size * 2, "tend",
|
||
addr_size * 2, "dstart",
|
||
addr_size * 2, "dend",
|
||
"section",
|
||
"file(member)");
|
||
|
||
for (vp = vmap; vp; vp = vp->nxt)
|
||
printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n",
|
||
phex (vp->tstart, addr_size),
|
||
phex (vp->tend, addr_size),
|
||
phex (vp->dstart, addr_size),
|
||
phex (vp->dend, addr_size),
|
||
vp->name,
|
||
*vp->member ? "(" : "", vp->member,
|
||
*vp->member ? ")" : "");
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_section_command (char *args, int from_tty)
|
||
{
|
||
struct target_section *p;
|
||
char *secname;
|
||
unsigned seclen;
|
||
unsigned long secaddr;
|
||
char secprint[100];
|
||
long offset;
|
||
struct target_section_table *table;
|
||
|
||
if (args == 0)
|
||
error (_("Must specify section name and its virtual address"));
|
||
|
||
/* Parse out section name */
|
||
for (secname = args; !isspace (*args); args++);
|
||
seclen = args - secname;
|
||
|
||
/* Parse out new virtual address */
|
||
secaddr = parse_and_eval_address (args);
|
||
|
||
table = current_target_sections;
|
||
for (p = table->sections; p < table->sections_end; p++)
|
||
{
|
||
if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
|
||
&& bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0')
|
||
{
|
||
offset = secaddr - p->addr;
|
||
p->addr += offset;
|
||
p->endaddr += offset;
|
||
if (from_tty)
|
||
exec_files_info (&exec_ops);
|
||
return;
|
||
}
|
||
}
|
||
if (seclen >= sizeof (secprint))
|
||
seclen = sizeof (secprint) - 1;
|
||
strncpy (secprint, secname, seclen);
|
||
secprint[seclen] = '\0';
|
||
error (_("Section %s not found"), secprint);
|
||
}
|
||
|
||
/* If we can find a section in FILENAME with BFD index INDEX, adjust
|
||
it to ADDRESS. */
|
||
|
||
void
|
||
exec_set_section_address (const char *filename, int index, CORE_ADDR address)
|
||
{
|
||
struct target_section *p;
|
||
struct target_section_table *table;
|
||
|
||
table = current_target_sections;
|
||
for (p = table->sections; p < table->sections_end; p++)
|
||
{
|
||
if (strcmp (filename, p->bfd->filename) == 0
|
||
&& index == p->the_bfd_section->index)
|
||
{
|
||
p->endaddr += address - p->addr;
|
||
p->addr = address;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If mourn is being called in all the right places, this could be say
|
||
`gdb internal error' (since generic_mourn calls
|
||
breakpoint_init_inferior). */
|
||
|
||
static int
|
||
ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
exec_has_memory (struct target_ops *ops)
|
||
{
|
||
/* We can provide memory if we have any file/target sections to read
|
||
from. */
|
||
return (current_target_sections->sections
|
||
!= current_target_sections->sections_end);
|
||
}
|
||
|
||
/* Find mapped memory. */
|
||
|
||
extern void
|
||
exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR,
|
||
unsigned long,
|
||
int, int, int,
|
||
void *),
|
||
void *))
|
||
{
|
||
exec_ops.to_find_memory_regions = func;
|
||
}
|
||
|
||
static char *exec_make_note_section (bfd *, int *);
|
||
|
||
/* Fill in the exec file target vector. Very few entries need to be
|
||
defined. */
|
||
|
||
static void
|
||
init_exec_ops (void)
|
||
{
|
||
exec_ops.to_shortname = "exec";
|
||
exec_ops.to_longname = "Local exec file";
|
||
exec_ops.to_doc = "Use an executable file as a target.\n\
|
||
Specify the filename of the executable file.";
|
||
exec_ops.to_open = exec_open;
|
||
exec_ops.to_close = exec_close_1;
|
||
exec_ops.to_attach = find_default_attach;
|
||
exec_ops.to_xfer_partial = exec_xfer_partial;
|
||
exec_ops.to_get_section_table = exec_get_section_table;
|
||
exec_ops.to_files_info = exec_files_info;
|
||
exec_ops.to_insert_breakpoint = ignore;
|
||
exec_ops.to_remove_breakpoint = ignore;
|
||
exec_ops.to_create_inferior = find_default_create_inferior;
|
||
exec_ops.to_stratum = file_stratum;
|
||
exec_ops.to_has_memory = exec_has_memory;
|
||
exec_ops.to_make_corefile_notes = exec_make_note_section;
|
||
exec_ops.to_magic = OPS_MAGIC;
|
||
}
|
||
|
||
void
|
||
_initialize_exec (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
init_exec_ops ();
|
||
|
||
if (!dbx_commands)
|
||
{
|
||
c = add_cmd ("file", class_files, file_command, _("\
|
||
Use FILE as program to be debugged.\n\
|
||
It is read for its symbols, for getting the contents of pure memory,\n\
|
||
and it is the program executed when you use the `run' command.\n\
|
||
If FILE cannot be found as specified, your execution directory path\n\
|
||
($PATH) is searched for a command of that name.\n\
|
||
No arg means to have no executable file and no symbols."), &cmdlist);
|
||
set_cmd_completer (c, filename_completer);
|
||
}
|
||
|
||
c = add_cmd ("exec-file", class_files, exec_file_command, _("\
|
||
Use FILE as program for getting contents of pure memory.\n\
|
||
If FILE cannot be found as specified, your execution directory path\n\
|
||
is searched for a command of that name.\n\
|
||
No arg means have no executable file."), &cmdlist);
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
add_com ("section", class_files, set_section_command, _("\
|
||
Change the base address of section SECTION of the exec file to ADDR.\n\
|
||
This can be used if the exec file does not contain section addresses,\n\
|
||
(such as in the a.out format), or when the addresses specified in the\n\
|
||
file itself are wrong. Each section must be changed separately. The\n\
|
||
``info files'' command lists all the sections and their addresses."));
|
||
|
||
add_setshow_boolean_cmd ("write", class_support, &write_files, _("\
|
||
Set writing into executable and core files."), _("\
|
||
Show writing into executable and core files."), NULL,
|
||
NULL,
|
||
show_write_files,
|
||
&setlist, &showlist);
|
||
|
||
add_target (&exec_ops);
|
||
}
|
||
|
||
static char *
|
||
exec_make_note_section (bfd *obfd, int *note_size)
|
||
{
|
||
error (_("Can't create a corefile"));
|
||
}
|