960 lines
26 KiB
C
960 lines
26 KiB
C
/* Work with executable files, for GDB.
|
||
|
||
Copyright (C) 1988-2003, 2007-2012 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.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "frame.h"
|
||
#include "inferior.h"
|
||
#include "target.h"
|
||
#include "gdbcmd.h"
|
||
#include "language.h"
|
||
#include "filenames.h"
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "completer.h"
|
||
#include "value.h"
|
||
#include "exec.h"
|
||
#include "observer.h"
|
||
#include "arch-utils.h"
|
||
#include "gdbthread.h"
|
||
#include "progspace.h"
|
||
#include "gdb_bfd.h"
|
||
|
||
#include <fcntl.h>
|
||
#include "readline/readline.h"
|
||
#include "gdb_string.h"
|
||
|
||
#include "gdbcore.h"
|
||
|
||
#include <ctype.h>
|
||
#include "gdb_stat.h"
|
||
|
||
#include "xcoffsolib.h"
|
||
|
||
struct vmap *map_vmap (bfd *, bfd *);
|
||
|
||
void (*deprecated_file_changed_hook) (char *);
|
||
|
||
/* Prototypes for local functions */
|
||
|
||
static void file_command (char *, int);
|
||
|
||
static void set_section_command (char *, int);
|
||
|
||
static void exec_files_info (struct target_ops *);
|
||
|
||
static void init_exec_ops (void);
|
||
|
||
void _initialize_exec (void);
|
||
|
||
/* The target vector for executable files. */
|
||
|
||
struct target_ops exec_ops;
|
||
|
||
/* True if the exec target is pushed on the stack. */
|
||
static int using_exec_ops;
|
||
|
||
/* Whether to open exec and core files read-only or read-write. */
|
||
|
||
int write_files = 0;
|
||
static void
|
||
show_write_files (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Writing into executable and core files is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
|
||
struct vmap *vmap;
|
||
|
||
static void
|
||
exec_open (char *args, int from_tty)
|
||
{
|
||
target_preopen (from_tty);
|
||
exec_file_attach (args, from_tty);
|
||
}
|
||
|
||
/* Close and clear exec_bfd. If we end up with no target sections to
|
||
read memory from, this unpushes the exec_ops target. */
|
||
|
||
void
|
||
exec_close (void)
|
||
{
|
||
if (exec_bfd)
|
||
{
|
||
bfd *abfd = exec_bfd;
|
||
|
||
gdb_bfd_unref (abfd);
|
||
|
||
/* Removing target sections may close the exec_ops target.
|
||
Clear exec_bfd before doing so to prevent recursion. */
|
||
exec_bfd = NULL;
|
||
exec_bfd_mtime = 0;
|
||
|
||
remove_target_sections (&exec_bfd, abfd);
|
||
}
|
||
}
|
||
|
||
/* This is the target_close implementation. Clears all target
|
||
sections and closes all executable bfds from all program spaces. */
|
||
|
||
static void
|
||
exec_close_1 (int quitting)
|
||
{
|
||
int need_symtab_cleanup = 0;
|
||
struct vmap *vp, *nxt;
|
||
|
||
using_exec_ops = 0;
|
||
|
||
for (nxt = vmap; nxt != NULL;)
|
||
{
|
||
vp = nxt;
|
||
nxt = vp->nxt;
|
||
|
||
if (vp->objfile)
|
||
{
|
||
free_objfile (vp->objfile);
|
||
need_symtab_cleanup = 1;
|
||
}
|
||
|
||
gdb_bfd_unref (vp->bfd);
|
||
|
||
xfree (vp);
|
||
}
|
||
|
||
vmap = NULL;
|
||
|
||
{
|
||
struct program_space *ss;
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_current_program_space ();
|
||
ALL_PSPACES (ss)
|
||
{
|
||
set_current_program_space (ss);
|
||
|
||
/* Delete all target sections. */
|
||
resize_section_table
|
||
(current_target_sections,
|
||
-resize_section_table (current_target_sections, 0));
|
||
|
||
exec_close ();
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
|
||
void
|
||
exec_file_clear (int from_tty)
|
||
{
|
||
/* Remove exec file. */
|
||
exec_close ();
|
||
|
||
if (from_tty)
|
||
printf_unfiltered (_("No executable file now.\n"));
|
||
}
|
||
|
||
/* Set FILENAME as the new exec file.
|
||
|
||
This function is intended to be behave essentially the same
|
||
as exec_file_command, except that the latter will detect when
|
||
a target is being debugged, and will ask the user whether it
|
||
should be shut down first. (If the answer is "no", then the
|
||
new file is ignored.)
|
||
|
||
This file is used by exec_file_command, to do the work of opening
|
||
and processing the exec file after any prompting has happened.
|
||
|
||
And, it is used by child_attach, when the attach command was
|
||
given a pid but not a exec pathname, and the attach command could
|
||
figure out the pathname from the pid. (In this case, we shouldn't
|
||
ask the user whether the current target should be shut down --
|
||
we're supplying the exec pathname late for good reason.) */
|
||
|
||
void
|
||
exec_file_attach (char *filename, int from_tty)
|
||
{
|
||
/* Remove any previous exec file. */
|
||
exec_close ();
|
||
|
||
/* Now open and digest the file the user requested, if any. */
|
||
|
||
if (!filename)
|
||
{
|
||
if (from_tty)
|
||
printf_unfiltered (_("No executable file now.\n"));
|
||
|
||
set_gdbarch_from_file (NULL);
|
||
}
|
||
else
|
||
{
|
||
struct cleanup *cleanups;
|
||
char *scratch_pathname;
|
||
int scratch_chan;
|
||
struct target_section *sections = NULL, *sections_end = NULL;
|
||
char **matching;
|
||
|
||
scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename,
|
||
write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
|
||
&scratch_pathname);
|
||
#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
|
||
if (scratch_chan < 0)
|
||
{
|
||
char *exename = alloca (strlen (filename) + 5);
|
||
|
||
strcat (strcpy (exename, filename), ".exe");
|
||
scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
|
||
write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
|
||
&scratch_pathname);
|
||
}
|
||
#endif
|
||
|
||
cleanups = make_cleanup (xfree, scratch_pathname);
|
||
|
||
if (scratch_chan < 0)
|
||
perror_with_name (filename);
|
||
if (write_files)
|
||
exec_bfd = gdb_bfd_fopen (scratch_pathname, gnutarget,
|
||
FOPEN_RUB, scratch_chan);
|
||
else
|
||
exec_bfd = gdb_bfd_open (scratch_pathname, gnutarget, scratch_chan);
|
||
|
||
if (!exec_bfd)
|
||
{
|
||
error (_("\"%s\": could not open as an executable file: %s"),
|
||
scratch_pathname, bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
|
||
if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching))
|
||
{
|
||
/* Make sure to close exec_bfd, or else "run" might try to use
|
||
it. */
|
||
exec_close ();
|
||
error (_("\"%s\": not in executable format: %s"),
|
||
scratch_pathname,
|
||
gdb_bfd_errmsg (bfd_get_error (), matching));
|
||
}
|
||
|
||
/* FIXME - This should only be run for RS6000, but the ifdef is a poor
|
||
way to accomplish. */
|
||
#ifdef DEPRECATED_IBM6000_TARGET
|
||
/* Setup initial vmap. */
|
||
|
||
map_vmap (exec_bfd, 0);
|
||
if (vmap == NULL)
|
||
{
|
||
/* Make sure to close exec_bfd, or else "run" might try to use
|
||
it. */
|
||
exec_close ();
|
||
error (_("\"%s\": can't find the file sections: %s"),
|
||
scratch_pathname, bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
#endif /* DEPRECATED_IBM6000_TARGET */
|
||
|
||
if (build_section_table (exec_bfd, §ions, §ions_end))
|
||
{
|
||
/* Make sure to close exec_bfd, or else "run" might try to use
|
||
it. */
|
||
exec_close ();
|
||
error (_("\"%s\": can't find the file sections: %s"),
|
||
scratch_pathname, bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
|
||
exec_bfd_mtime = bfd_get_mtime (exec_bfd);
|
||
|
||
validate_files ();
|
||
|
||
set_gdbarch_from_file (exec_bfd);
|
||
|
||
/* Add the executable's sections to the current address spaces'
|
||
list of sections. This possibly pushes the exec_ops
|
||
target. */
|
||
add_target_sections (&exec_bfd, sections, sections_end);
|
||
xfree (sections);
|
||
|
||
/* Tell display code (if any) about the changed file name. */
|
||
if (deprecated_exec_file_display_hook)
|
||
(*deprecated_exec_file_display_hook) (filename);
|
||
|
||
do_cleanups (cleanups);
|
||
}
|
||
bfd_cache_close_all ();
|
||
observer_notify_executable_changed ();
|
||
}
|
||
|
||
/* Process the first arg in ARGS as the new exec file.
|
||
|
||
Note that we have to explicitly ignore additional args, since we can
|
||
be called from file_command(), which also calls symbol_file_command()
|
||
which can take multiple args.
|
||
|
||
If ARGS is NULL, we just want to close the exec file. */
|
||
|
||
static void
|
||
exec_file_command (char *args, int from_tty)
|
||
{
|
||
char **argv;
|
||
char *filename;
|
||
|
||
if (from_tty && target_has_execution
|
||
&& !query (_("A program is being debugged already.\n"
|
||
"Are you sure you want to change the file? ")))
|
||
error (_("File not changed."));
|
||
|
||
if (args)
|
||
{
|
||
struct cleanup *cleanups;
|
||
|
||
/* Scan through the args and pick up the first non option arg
|
||
as the filename. */
|
||
|
||
argv = gdb_buildargv (args);
|
||
cleanups = make_cleanup_freeargv (argv);
|
||
|
||
for (; (*argv != NULL) && (**argv == '-'); argv++)
|
||
{;
|
||
}
|
||
if (*argv == NULL)
|
||
error (_("No executable file name was specified"));
|
||
|
||
filename = tilde_expand (*argv);
|
||
make_cleanup (xfree, filename);
|
||
exec_file_attach (filename, from_tty);
|
||
|
||
do_cleanups (cleanups);
|
||
}
|
||
else
|
||
exec_file_attach (NULL, from_tty);
|
||
}
|
||
|
||
/* Set both the exec file and the symbol file, in one command.
|
||
What a novelty. Why did GDB go through four major releases before this
|
||
command was added? */
|
||
|
||
static void
|
||
file_command (char *arg, int from_tty)
|
||
{
|
||
/* FIXME, if we lose on reading the symbol file, we should revert
|
||
the exec file, but that's rough. */
|
||
exec_file_command (arg, from_tty);
|
||
symbol_file_command (arg, from_tty);
|
||
if (deprecated_file_changed_hook)
|
||
deprecated_file_changed_hook (arg);
|
||
}
|
||
|
||
|
||
/* Locate all mappable sections of a BFD file.
|
||
table_pp_char is a char * to get it through bfd_map_over_sections;
|
||
we cast it back to its proper type. */
|
||
|
||
static void
|
||
add_to_section_table (bfd *abfd, struct bfd_section *asect,
|
||
void *table_pp_char)
|
||
{
|
||
struct target_section **table_pp = (struct target_section **) table_pp_char;
|
||
flagword aflag;
|
||
|
||
/* Check the section flags, but do not discard zero-length sections, since
|
||
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
|
||
section to which a symbol named "_end" was attached. The address
|
||
of this symbol still needs to be relocated. */
|
||
aflag = bfd_get_section_flags (abfd, asect);
|
||
if (!(aflag & SEC_ALLOC))
|
||
return;
|
||
|
||
(*table_pp)->key = NULL;
|
||
(*table_pp)->bfd = abfd;
|
||
(*table_pp)->the_bfd_section = asect;
|
||
(*table_pp)->addr = bfd_section_vma (abfd, asect);
|
||
(*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
|
||
(*table_pp)++;
|
||
}
|
||
|
||
int
|
||
resize_section_table (struct target_section_table *table, int num_added)
|
||
{
|
||
struct target_section *old_value;
|
||
int old_count;
|
||
int new_count;
|
||
|
||
old_value = table->sections;
|
||
old_count = table->sections_end - table->sections;
|
||
|
||
new_count = num_added + old_count;
|
||
|
||
if (new_count)
|
||
{
|
||
table->sections = xrealloc (table->sections,
|
||
sizeof (struct target_section) * new_count);
|
||
table->sections_end = table->sections + new_count;
|
||
}
|
||
else
|
||
{
|
||
xfree (table->sections);
|
||
table->sections = table->sections_end = NULL;
|
||
}
|
||
|
||
return old_count;
|
||
}
|
||
|
||
/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
|
||
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;
|
||
|
||
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 (void *key,
|
||
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);
|
||
int i;
|
||
|
||
for (i = 0; i < count; ++i)
|
||
{
|
||
table->sections[space + i] = sections[i];
|
||
table->sections[space + i].key = key;
|
||
}
|
||
|
||
/* 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 (void *key, 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->key != key || 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;
|
||
gdb_bfd_ref (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;
|
||
}
|
||
|
||
|
||
VEC(mem_range_s) *
|
||
section_table_available_memory (VEC(mem_range_s) *memory,
|
||
CORE_ADDR memaddr, ULONGEST len,
|
||
struct target_section *sections,
|
||
struct target_section *sections_end)
|
||
{
|
||
struct target_section *p;
|
||
|
||
for (p = sections; p < sections_end; p++)
|
||
{
|
||
if ((bfd_get_section_flags (p->bfd, p->the_bfd_section)
|
||
& SEC_READONLY) == 0)
|
||
continue;
|
||
|
||
/* Copy the meta-data, adjusted. */
|
||
if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len))
|
||
{
|
||
ULONGEST lo1, hi1, lo2, hi2;
|
||
struct mem_range *r;
|
||
|
||
lo1 = memaddr;
|
||
hi1 = memaddr + len;
|
||
|
||
lo2 = p->addr;
|
||
hi2 = p->endaddr;
|
||
|
||
r = VEC_safe_push (mem_range_s, memory, NULL);
|
||
|
||
r->start = max (lo1, lo2);
|
||
r->length = min (hi1, hi2) - r->start;
|
||
}
|
||
}
|
||
|
||
return memory;
|
||
}
|
||
|
||
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. */
|
||
}
|
||
|
||
static 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;
|
||
bfd_vma entry_point;
|
||
|
||
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."),
|
||
bfd_get_filename (abfd));
|
||
|
||
entry_point = gdbarch_addr_bits_remove (gdbarch,
|
||
bfd_get_start_address (abfd)
|
||
+ displacement);
|
||
printf_filtered (_("\tEntry point: %s\n"),
|
||
paddress (gdbarch, entry_point));
|
||
}
|
||
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)
|
||
{
|
||
if (exec_bfd)
|
||
print_section_info (current_target_sections, exec_bfd);
|
||
else
|
||
puts_filtered (_("\t<no file loaded>\n"));
|
||
|
||
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 (p->bfd,
|
||
p->the_bfd_section), seclen)
|
||
&& bfd_section_name (p->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 (filename_cmp (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) (find_memory_region_ftype, 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"));
|
||
}
|