mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-23 18:14:13 +08:00
ce875075f9
LTO output objects have an STT_FILE symbol using the name of the file, a temporary file. This results in executables that can't be exactly reproduced, so the file name needs to be dropped. We don't want to lose all file symbols when linking a mix of lto and non-lto objects as a file symbol can be used to figure which source file generated a given local symbol. So lto output objects need to be marked. I chose to mark lto output objects with a new bfd flag. This flag is also used to fix a bug in the link-once handling; An object being loaded after "loading_lto_outputs" is set might be one extracted from an archive to satisfy new references from lto objects, not an lto object itself. The new flag is copied from archive to elements, and the same done for no_export. This fixes a bug in that --exclude-libs doesn't work with thin archives. I'm not completely happy with this part of the patch and may revist this to avoid the hack in _bfd_look_for_bfd_in_cache. PR ld/17973 include/ * bfdlink.h (struct bfd_link_info): Delete loading_lto_outputs. bfd/ * bfd.c (struct bfd): Add lto_output. * linker.c (_bfd_handle_already_linked): Explicitly test for objects added by the lto plugin. * opncls.c (_bfd_new_bfd_contained_in): Copy lto_output and no_export flags from archive. * archive.c (open_nested_file): New function, setting lto_output and no_export, extracted from.. (find_nested_archive): ..here. Flip params. Rename from _bfd_find_nested_archive. (_bfd_get_elt_at_filepos): Correct var typo. Use open_nested_file. (_bfd_look_for_bfd_in_cache): Copy no_export. * elflink.c (elf_link_add_object_symbols): Remove now unnecessary my_archive->no_export test. (elf_link_input_bfd): Drop existing lto_output STT_FILE syms. Don't use the file name when adding lto_output STT_FILE sym. * bfd-in2.h: Regenerate. ld/ * ldlang.h (struct lang_input_statement_flags): Add lto_output. * ldlang.c (lang_process): Don't set loading_lto_outputs. * ldfile.c (ldfile_try_open_bfd): Transfer entry flags.lto_output to bfd. * plugin.c (add_input_file, add_input_library): Set flags.lto_output.
1698 lines
44 KiB
C
1698 lines
44 KiB
C
/* opncls.c -- open and close a BFD.
|
||
Copyright (C) 1990-2015 Free Software Foundation, Inc.
|
||
|
||
Written by Cygnus Support.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
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, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
||
MA 02110-1301, USA. */
|
||
|
||
#include "sysdep.h"
|
||
#include "bfd.h"
|
||
#include "objalloc.h"
|
||
#include "libbfd.h"
|
||
#include "libiberty.h"
|
||
|
||
#ifndef S_IXUSR
|
||
#define S_IXUSR 0100 /* Execute by owner. */
|
||
#endif
|
||
#ifndef S_IXGRP
|
||
#define S_IXGRP 0010 /* Execute by group. */
|
||
#endif
|
||
#ifndef S_IXOTH
|
||
#define S_IXOTH 0001 /* Execute by others. */
|
||
#endif
|
||
|
||
/* Counters used to initialize the bfd identifier. */
|
||
|
||
static unsigned int bfd_id_counter = 0;
|
||
static unsigned int bfd_reserved_id_counter = 0;
|
||
|
||
/*
|
||
CODE_FRAGMENT
|
||
.{* Set to N to open the next N BFDs using an alternate id space. *}
|
||
.extern unsigned int bfd_use_reserved_id;
|
||
*/
|
||
unsigned int bfd_use_reserved_id = 0;
|
||
|
||
/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
|
||
if we do that we can't use fcntl. */
|
||
|
||
/* Return a new BFD. All BFD's are allocated through this routine. */
|
||
|
||
bfd *
|
||
_bfd_new_bfd (void)
|
||
{
|
||
bfd *nbfd;
|
||
|
||
nbfd = (bfd *) bfd_zmalloc (sizeof (bfd));
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
|
||
if (bfd_use_reserved_id)
|
||
{
|
||
nbfd->id = --bfd_reserved_id_counter;
|
||
--bfd_use_reserved_id;
|
||
}
|
||
else
|
||
nbfd->id = bfd_id_counter++;
|
||
|
||
nbfd->memory = objalloc_create ();
|
||
if (nbfd->memory == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
free (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
nbfd->arch_info = &bfd_default_arch_struct;
|
||
|
||
if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
|
||
sizeof (struct section_hash_entry), 13))
|
||
{
|
||
free (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
static const struct bfd_iovec opncls_iovec;
|
||
|
||
/* Allocate a new BFD as a member of archive OBFD. */
|
||
|
||
bfd *
|
||
_bfd_new_bfd_contained_in (bfd *obfd)
|
||
{
|
||
bfd *nbfd;
|
||
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
nbfd->xvec = obfd->xvec;
|
||
nbfd->iovec = obfd->iovec;
|
||
if (obfd->iovec == &opncls_iovec)
|
||
nbfd->iostream = obfd->iostream;
|
||
nbfd->my_archive = obfd;
|
||
nbfd->direction = read_direction;
|
||
nbfd->target_defaulted = obfd->target_defaulted;
|
||
nbfd->lto_output = obfd->lto_output;
|
||
nbfd->no_export = obfd->no_export;
|
||
return nbfd;
|
||
}
|
||
|
||
/* Delete a BFD. */
|
||
|
||
static void
|
||
_bfd_delete_bfd (bfd *abfd)
|
||
{
|
||
if (abfd->memory)
|
||
{
|
||
bfd_hash_table_free (&abfd->section_htab);
|
||
objalloc_free ((struct objalloc *) abfd->memory);
|
||
}
|
||
|
||
if (abfd->filename)
|
||
free ((char *) abfd->filename);
|
||
free (abfd->arelt_data);
|
||
free (abfd);
|
||
}
|
||
|
||
/* Free objalloc memory. */
|
||
|
||
bfd_boolean
|
||
_bfd_free_cached_info (bfd *abfd)
|
||
{
|
||
if (abfd->memory)
|
||
{
|
||
bfd_hash_table_free (&abfd->section_htab);
|
||
objalloc_free ((struct objalloc *) abfd->memory);
|
||
|
||
abfd->sections = NULL;
|
||
abfd->section_last = NULL;
|
||
abfd->outsymbols = NULL;
|
||
abfd->tdata.any = NULL;
|
||
abfd->usrdata = NULL;
|
||
abfd->memory = NULL;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*
|
||
SECTION
|
||
Opening and closing BFDs
|
||
|
||
SUBSECTION
|
||
Functions for opening and closing
|
||
*/
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_fopen
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_fopen (const char *filename, const char *target,
|
||
const char *mode, int fd);
|
||
|
||
DESCRIPTION
|
||
Open the file @var{filename} with the target @var{target}.
|
||
Return a pointer to the created BFD. If @var{fd} is not -1,
|
||
then <<fdopen>> is used to open the file; otherwise, <<fopen>>
|
||
is used. @var{mode} is passed directly to <<fopen>> or
|
||
<<fdopen>>.
|
||
|
||
Calls <<bfd_find_target>>, so @var{target} is interpreted as by
|
||
that function.
|
||
|
||
The new BFD is marked as cacheable iff @var{fd} is -1.
|
||
|
||
If <<NULL>> is returned then an error has occured. Possible errors
|
||
are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
|
||
<<system_call>> error.
|
||
|
||
On error, @var{fd} is always closed.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_fopen (const char *filename, const char *target, const char *mode, int fd)
|
||
{
|
||
bfd *nbfd;
|
||
const bfd_target *target_vec;
|
||
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
{
|
||
if (fd != -1)
|
||
close (fd);
|
||
return NULL;
|
||
}
|
||
|
||
target_vec = bfd_find_target (target, nbfd);
|
||
if (target_vec == NULL)
|
||
{
|
||
if (fd != -1)
|
||
close (fd);
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
#ifdef HAVE_FDOPEN
|
||
if (fd != -1)
|
||
nbfd->iostream = fdopen (fd, mode);
|
||
else
|
||
#endif
|
||
nbfd->iostream = real_fopen (filename, mode);
|
||
if (nbfd->iostream == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_system_call);
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
/* OK, put everything where it belongs. */
|
||
|
||
/* PR 11983: Do not cache the original filename, but
|
||
rather make a copy - the original might go away. */
|
||
nbfd->filename = xstrdup (filename);
|
||
|
||
/* Figure out whether the user is opening the file for reading,
|
||
writing, or both, by looking at the MODE argument. */
|
||
if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a')
|
||
&& mode[1] == '+')
|
||
nbfd->direction = both_direction;
|
||
else if (mode[0] == 'r')
|
||
nbfd->direction = read_direction;
|
||
else
|
||
nbfd->direction = write_direction;
|
||
|
||
if (! bfd_cache_init (nbfd))
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
nbfd->opened_once = TRUE;
|
||
|
||
/* If we opened the file by name, mark it cacheable; we can close it
|
||
and reopen it later. However, if a file descriptor was provided,
|
||
then it may have been opened with special flags that make it
|
||
unsafe to close and reopen the file. */
|
||
if (fd == -1)
|
||
(void) bfd_set_cacheable (nbfd, TRUE);
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_openr
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_openr (const char *filename, const char *target);
|
||
|
||
DESCRIPTION
|
||
Open the file @var{filename} (using <<fopen>>) with the target
|
||
@var{target}. Return a pointer to the created BFD.
|
||
|
||
Calls <<bfd_find_target>>, so @var{target} is interpreted as by
|
||
that function.
|
||
|
||
If <<NULL>> is returned then an error has occured. Possible errors
|
||
are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
|
||
<<system_call>> error.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_openr (const char *filename, const char *target)
|
||
{
|
||
return bfd_fopen (filename, target, FOPEN_RB, -1);
|
||
}
|
||
|
||
/* Don't try to `optimize' this function:
|
||
|
||
o - We lock using stack space so that interrupting the locking
|
||
won't cause a storage leak.
|
||
o - We open the file stream last, since we don't want to have to
|
||
close it if anything goes wrong. Closing the stream means closing
|
||
the file descriptor too, even though we didn't open it. */
|
||
/*
|
||
FUNCTION
|
||
bfd_fdopenr
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_fdopenr (const char *filename, const char *target, int fd);
|
||
|
||
DESCRIPTION
|
||
<<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to
|
||
<<fopen>>. It opens a BFD on a file already described by the
|
||
@var{fd} supplied.
|
||
|
||
When the file is later <<bfd_close>>d, the file descriptor will
|
||
be closed. If the caller desires that this file descriptor be
|
||
cached by BFD (opened as needed, closed as needed to free
|
||
descriptors for other opens), with the supplied @var{fd} used as
|
||
an initial file descriptor (but subject to closure at any time),
|
||
call bfd_set_cacheable(bfd, 1) on the returned BFD. The default
|
||
is to assume no caching; the file descriptor will remain open
|
||
until <<bfd_close>>, and will not be affected by BFD operations
|
||
on other files.
|
||
|
||
Possible errors are <<bfd_error_no_memory>>,
|
||
<<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
|
||
|
||
On error, @var{fd} is closed.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_fdopenr (const char *filename, const char *target, int fd)
|
||
{
|
||
const char *mode;
|
||
#if defined(HAVE_FCNTL) && defined(F_GETFL)
|
||
int fdflags;
|
||
#endif
|
||
|
||
#if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
|
||
mode = FOPEN_RUB; /* Assume full access. */
|
||
#else
|
||
fdflags = fcntl (fd, F_GETFL, NULL);
|
||
if (fdflags == -1)
|
||
{
|
||
int save = errno;
|
||
|
||
close (fd);
|
||
errno = save;
|
||
bfd_set_error (bfd_error_system_call);
|
||
return NULL;
|
||
}
|
||
|
||
/* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
|
||
switch (fdflags & (O_ACCMODE))
|
||
{
|
||
case O_RDONLY: mode = FOPEN_RB; break;
|
||
case O_WRONLY: mode = FOPEN_RUB; break;
|
||
case O_RDWR: mode = FOPEN_RUB; break;
|
||
default: abort ();
|
||
}
|
||
#endif
|
||
|
||
return bfd_fopen (filename, target, mode, fd);
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_openstreamr
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_openstreamr (const char * filename, const char * target, void * stream);
|
||
|
||
DESCRIPTION
|
||
|
||
Open a BFD for read access on an existing stdio stream. When
|
||
the BFD is passed to <<bfd_close>>, the stream will be closed.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_openstreamr (const char *filename, const char *target, void *streamarg)
|
||
{
|
||
FILE *stream = (FILE *) streamarg;
|
||
bfd *nbfd;
|
||
const bfd_target *target_vec;
|
||
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
|
||
target_vec = bfd_find_target (target, nbfd);
|
||
if (target_vec == NULL)
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
nbfd->iostream = stream;
|
||
/* PR 11983: Do not cache the original filename, but
|
||
rather make a copy - the original might go away. */
|
||
nbfd->filename = xstrdup (filename);
|
||
nbfd->direction = read_direction;
|
||
|
||
if (! bfd_cache_init (nbfd))
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_openr_iovec
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_openr_iovec (const char *filename, const char *target,
|
||
void *(*open_func) (struct bfd *nbfd,
|
||
void *open_closure),
|
||
void *open_closure,
|
||
file_ptr (*pread_func) (struct bfd *nbfd,
|
||
void *stream,
|
||
void *buf,
|
||
file_ptr nbytes,
|
||
file_ptr offset),
|
||
int (*close_func) (struct bfd *nbfd,
|
||
void *stream),
|
||
int (*stat_func) (struct bfd *abfd,
|
||
void *stream,
|
||
struct stat *sb));
|
||
|
||
DESCRIPTION
|
||
|
||
Create and return a BFD backed by a read-only @var{stream}.
|
||
The @var{stream} is created using @var{open_func}, accessed using
|
||
@var{pread_func} and destroyed using @var{close_func}.
|
||
|
||
Calls <<bfd_find_target>>, so @var{target} is interpreted as by
|
||
that function.
|
||
|
||
Calls @var{open_func} (which can call <<bfd_zalloc>> and
|
||
<<bfd_get_filename>>) to obtain the read-only stream backing
|
||
the BFD. @var{open_func} either succeeds returning the
|
||
non-<<NULL>> @var{stream}, or fails returning <<NULL>>
|
||
(setting <<bfd_error>>).
|
||
|
||
Calls @var{pread_func} to request @var{nbytes} of data from
|
||
@var{stream} starting at @var{offset} (e.g., via a call to
|
||
<<bfd_read>>). @var{pread_func} either succeeds returning the
|
||
number of bytes read (which can be less than @var{nbytes} when
|
||
end-of-file), or fails returning -1 (setting <<bfd_error>>).
|
||
|
||
Calls @var{close_func} when the BFD is later closed using
|
||
<<bfd_close>>. @var{close_func} either succeeds returning 0, or
|
||
fails returning -1 (setting <<bfd_error>>).
|
||
|
||
Calls @var{stat_func} to fill in a stat structure for bfd_stat,
|
||
bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0
|
||
on success, or returns -1 on failure (setting <<bfd_error>>).
|
||
|
||
If <<bfd_openr_iovec>> returns <<NULL>> then an error has
|
||
occurred. Possible errors are <<bfd_error_no_memory>>,
|
||
<<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
struct opncls
|
||
{
|
||
void *stream;
|
||
file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf,
|
||
file_ptr nbytes, file_ptr offset);
|
||
int (*close) (struct bfd *abfd, void *stream);
|
||
int (*stat) (struct bfd *abfd, void *stream, struct stat *sb);
|
||
file_ptr where;
|
||
};
|
||
|
||
static file_ptr
|
||
opncls_btell (struct bfd *abfd)
|
||
{
|
||
struct opncls *vec = (struct opncls *) abfd->iostream;
|
||
return vec->where;
|
||
}
|
||
|
||
static int
|
||
opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
|
||
{
|
||
struct opncls *vec = (struct opncls *) abfd->iostream;
|
||
switch (whence)
|
||
{
|
||
case SEEK_SET: vec->where = offset; break;
|
||
case SEEK_CUR: vec->where += offset; break;
|
||
case SEEK_END: return -1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static file_ptr
|
||
opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
|
||
{
|
||
struct opncls *vec = (struct opncls *) abfd->iostream;
|
||
file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where);
|
||
if (nread < 0)
|
||
return nread;
|
||
vec->where += nread;
|
||
return nread;
|
||
}
|
||
|
||
static file_ptr
|
||
opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED,
|
||
const void *where ATTRIBUTE_UNUSED,
|
||
file_ptr nbytes ATTRIBUTE_UNUSED)
|
||
{
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
opncls_bclose (struct bfd *abfd)
|
||
{
|
||
struct opncls *vec = (struct opncls *) abfd->iostream;
|
||
/* Since the VEC's memory is bound to the bfd deleting the bfd will
|
||
free it. */
|
||
int status = 0;
|
||
if (vec->close != NULL)
|
||
status = (vec->close) (abfd, vec->stream);
|
||
abfd->iostream = NULL;
|
||
return status;
|
||
}
|
||
|
||
static int
|
||
opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
opncls_bstat (struct bfd *abfd, struct stat *sb)
|
||
{
|
||
struct opncls *vec = (struct opncls *) abfd->iostream;
|
||
|
||
memset (sb, 0, sizeof (*sb));
|
||
if (vec->stat == NULL)
|
||
return 0;
|
||
|
||
return (vec->stat) (abfd, vec->stream, sb);
|
||
}
|
||
|
||
static void *
|
||
opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED,
|
||
void *addr ATTRIBUTE_UNUSED,
|
||
bfd_size_type len ATTRIBUTE_UNUSED,
|
||
int prot ATTRIBUTE_UNUSED,
|
||
int flags ATTRIBUTE_UNUSED,
|
||
file_ptr offset ATTRIBUTE_UNUSED,
|
||
void **map_addr ATTRIBUTE_UNUSED,
|
||
bfd_size_type *map_len ATTRIBUTE_UNUSED)
|
||
{
|
||
return (void *) -1;
|
||
}
|
||
|
||
static const struct bfd_iovec opncls_iovec = {
|
||
&opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
|
||
&opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap
|
||
};
|
||
|
||
bfd *
|
||
bfd_openr_iovec (const char *filename, const char *target,
|
||
void *(*open_p) (struct bfd *, void *),
|
||
void *open_closure,
|
||
file_ptr (*pread_p) (struct bfd *, void *, void *,
|
||
file_ptr, file_ptr),
|
||
int (*close_p) (struct bfd *, void *),
|
||
int (*stat_p) (struct bfd *, void *, struct stat *))
|
||
{
|
||
bfd *nbfd;
|
||
const bfd_target *target_vec;
|
||
struct opncls *vec;
|
||
void *stream;
|
||
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
|
||
target_vec = bfd_find_target (target, nbfd);
|
||
if (target_vec == NULL)
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
/* PR 11983: Do not cache the original filename, but
|
||
rather make a copy - the original might go away. */
|
||
nbfd->filename = xstrdup (filename);
|
||
nbfd->direction = read_direction;
|
||
|
||
/* `open_p (...)' would get expanded by an the open(2) syscall macro. */
|
||
stream = (*open_p) (nbfd, open_closure);
|
||
if (stream == NULL)
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls));
|
||
vec->stream = stream;
|
||
vec->pread = pread_p;
|
||
vec->close = close_p;
|
||
vec->stat = stat_p;
|
||
|
||
nbfd->iovec = &opncls_iovec;
|
||
nbfd->iostream = vec;
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
/* bfd_openw -- open for writing.
|
||
Returns a pointer to a freshly-allocated BFD on success, or NULL.
|
||
|
||
See comment by bfd_fdopenr before you try to modify this function. */
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_openw
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_openw (const char *filename, const char *target);
|
||
|
||
DESCRIPTION
|
||
Create a BFD, associated with file @var{filename}, using the
|
||
file format @var{target}, and return a pointer to it.
|
||
|
||
Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>,
|
||
<<bfd_error_invalid_target>>.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_openw (const char *filename, const char *target)
|
||
{
|
||
bfd *nbfd;
|
||
const bfd_target *target_vec;
|
||
|
||
/* nbfd has to point to head of malloc'ed block so that bfd_close may
|
||
reclaim it correctly. */
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
|
||
target_vec = bfd_find_target (target, nbfd);
|
||
if (target_vec == NULL)
|
||
{
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
/* PR 11983: Do not cache the original filename, but
|
||
rather make a copy - the original might go away. */
|
||
nbfd->filename = xstrdup (filename);
|
||
nbfd->direction = write_direction;
|
||
|
||
if (bfd_open_file (nbfd) == NULL)
|
||
{
|
||
/* File not writeable, etc. */
|
||
bfd_set_error (bfd_error_system_call);
|
||
_bfd_delete_bfd (nbfd);
|
||
return NULL;
|
||
}
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
static inline void
|
||
_maybe_make_executable (bfd * abfd)
|
||
{
|
||
/* If the file was open for writing and is now executable,
|
||
make it so. */
|
||
if (abfd->direction == write_direction
|
||
&& (abfd->flags & (EXEC_P | DYNAMIC)) != 0)
|
||
{
|
||
struct stat buf;
|
||
|
||
if (stat (abfd->filename, &buf) == 0
|
||
/* Do not attempt to change non-regular files. This is
|
||
here especially for configure scripts and kernel builds
|
||
which run tests with "ld [...] -o /dev/null". */
|
||
&& S_ISREG(buf.st_mode))
|
||
{
|
||
unsigned int mask = umask (0);
|
||
|
||
umask (mask);
|
||
chmod (abfd->filename,
|
||
(0777
|
||
& (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
|
||
FUNCTION
|
||
bfd_close
|
||
|
||
SYNOPSIS
|
||
bfd_boolean bfd_close (bfd *abfd);
|
||
|
||
DESCRIPTION
|
||
|
||
Close a BFD. If the BFD was open for writing, then pending
|
||
operations are completed and the file written out and closed.
|
||
If the created file is executable, then <<chmod>> is called
|
||
to mark it as such.
|
||
|
||
All memory attached to the BFD is released.
|
||
|
||
The file descriptor associated with the BFD is closed (even
|
||
if it was passed in to BFD by <<bfd_fdopenr>>).
|
||
|
||
RETURNS
|
||
<<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
|
||
*/
|
||
|
||
|
||
bfd_boolean
|
||
bfd_close (bfd *abfd)
|
||
{
|
||
bfd_boolean ret;
|
||
|
||
if (bfd_write_p (abfd))
|
||
{
|
||
if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
|
||
return FALSE;
|
||
}
|
||
|
||
if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
|
||
return FALSE;
|
||
|
||
ret = abfd->iovec->bclose (abfd) == 0;
|
||
|
||
if (ret)
|
||
_maybe_make_executable (abfd);
|
||
|
||
_bfd_delete_bfd (abfd);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_close_all_done
|
||
|
||
SYNOPSIS
|
||
bfd_boolean bfd_close_all_done (bfd *);
|
||
|
||
DESCRIPTION
|
||
Close a BFD. Differs from <<bfd_close>> since it does not
|
||
complete any pending operations. This routine would be used
|
||
if the application had just used BFD for swapping and didn't
|
||
want to use any of the writing code.
|
||
|
||
If the created file is executable, then <<chmod>> is called
|
||
to mark it as such.
|
||
|
||
All memory attached to the BFD is released.
|
||
|
||
RETURNS
|
||
<<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
|
||
*/
|
||
|
||
bfd_boolean
|
||
bfd_close_all_done (bfd *abfd)
|
||
{
|
||
bfd_boolean ret;
|
||
|
||
ret = bfd_cache_close (abfd);
|
||
|
||
if (ret)
|
||
_maybe_make_executable (abfd);
|
||
|
||
_bfd_delete_bfd (abfd);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_create
|
||
|
||
SYNOPSIS
|
||
bfd *bfd_create (const char *filename, bfd *templ);
|
||
|
||
DESCRIPTION
|
||
Create a new BFD in the manner of <<bfd_openw>>, but without
|
||
opening a file. The new BFD takes the target from the target
|
||
used by @var{templ}. The format is always set to <<bfd_object>>.
|
||
|
||
A copy of the @var{filename} argument is stored in the newly created
|
||
BFD. It can be accessed via the bfd_get_filename() macro.
|
||
*/
|
||
|
||
bfd *
|
||
bfd_create (const char *filename, bfd *templ)
|
||
{
|
||
bfd *nbfd;
|
||
|
||
nbfd = _bfd_new_bfd ();
|
||
if (nbfd == NULL)
|
||
return NULL;
|
||
/* PR 11983: Do not cache the original filename, but
|
||
rather make a copy - the original might go away. */
|
||
nbfd->filename = xstrdup (filename);
|
||
if (templ)
|
||
nbfd->xvec = templ->xvec;
|
||
nbfd->direction = no_direction;
|
||
bfd_set_format (nbfd, bfd_object);
|
||
|
||
return nbfd;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_make_writable
|
||
|
||
SYNOPSIS
|
||
bfd_boolean bfd_make_writable (bfd *abfd);
|
||
|
||
DESCRIPTION
|
||
Takes a BFD as created by <<bfd_create>> and converts it
|
||
into one like as returned by <<bfd_openw>>. It does this
|
||
by converting the BFD to BFD_IN_MEMORY. It's assumed that
|
||
you will call <<bfd_make_readable>> on this bfd later.
|
||
|
||
RETURNS
|
||
<<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
|
||
*/
|
||
|
||
bfd_boolean
|
||
bfd_make_writable (bfd *abfd)
|
||
{
|
||
struct bfd_in_memory *bim;
|
||
|
||
if (abfd->direction != no_direction)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return FALSE;
|
||
}
|
||
|
||
bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
|
||
if (bim == NULL)
|
||
return FALSE; /* bfd_error already set. */
|
||
abfd->iostream = bim;
|
||
/* bfd_bwrite will grow these as needed. */
|
||
bim->size = 0;
|
||
bim->buffer = 0;
|
||
|
||
abfd->flags |= BFD_IN_MEMORY;
|
||
abfd->iovec = &_bfd_memory_iovec;
|
||
abfd->origin = 0;
|
||
abfd->direction = write_direction;
|
||
abfd->where = 0;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_make_readable
|
||
|
||
SYNOPSIS
|
||
bfd_boolean bfd_make_readable (bfd *abfd);
|
||
|
||
DESCRIPTION
|
||
Takes a BFD as created by <<bfd_create>> and
|
||
<<bfd_make_writable>> and converts it into one like as
|
||
returned by <<bfd_openr>>. It does this by writing the
|
||
contents out to the memory buffer, then reversing the
|
||
direction.
|
||
|
||
RETURNS
|
||
<<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */
|
||
|
||
bfd_boolean
|
||
bfd_make_readable (bfd *abfd)
|
||
{
|
||
if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY))
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return FALSE;
|
||
}
|
||
|
||
if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
|
||
return FALSE;
|
||
|
||
if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
|
||
return FALSE;
|
||
|
||
abfd->arch_info = &bfd_default_arch_struct;
|
||
|
||
abfd->where = 0;
|
||
abfd->format = bfd_unknown;
|
||
abfd->my_archive = NULL;
|
||
abfd->origin = 0;
|
||
abfd->opened_once = FALSE;
|
||
abfd->output_has_begun = FALSE;
|
||
abfd->section_count = 0;
|
||
abfd->usrdata = NULL;
|
||
abfd->cacheable = FALSE;
|
||
abfd->flags |= BFD_IN_MEMORY;
|
||
abfd->mtime_set = FALSE;
|
||
|
||
abfd->target_defaulted = TRUE;
|
||
abfd->direction = read_direction;
|
||
abfd->sections = 0;
|
||
abfd->symcount = 0;
|
||
abfd->outsymbols = 0;
|
||
abfd->tdata.any = 0;
|
||
|
||
bfd_section_list_clear (abfd);
|
||
bfd_check_format (abfd, bfd_object);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_alloc
|
||
|
||
SYNOPSIS
|
||
void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
|
||
|
||
DESCRIPTION
|
||
Allocate a block of @var{wanted} bytes of memory attached to
|
||
<<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
|
||
bfd_alloc (bfd *abfd, bfd_size_type size)
|
||
{
|
||
void *ret;
|
||
unsigned long ul_size = (unsigned long) size;
|
||
|
||
if (size != ul_size
|
||
/* Note - although objalloc_alloc takes an unsigned long as its
|
||
argument, internally the size is treated as a signed long. This can
|
||
lead to problems where, for example, a request to allocate -1 bytes
|
||
can result in just 1 byte being allocated, rather than
|
||
((unsigned long) -1) bytes. Also memory checkers will often
|
||
complain about attempts to allocate a negative amount of memory.
|
||
So to stop these problems we fail if the size is negative. */
|
||
|| ((signed long) ul_size) < 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return NULL;
|
||
}
|
||
|
||
ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size);
|
||
if (ret == NULL)
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return ret;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_alloc2
|
||
|
||
SYNOPSIS
|
||
void *bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
|
||
|
||
DESCRIPTION
|
||
Allocate a block of @var{nmemb} elements of @var{size} bytes each
|
||
of memory attached to <<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
|
||
bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
|
||
{
|
||
if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
|
||
&& size != 0
|
||
&& nmemb > ~(bfd_size_type) 0 / size)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return NULL;
|
||
}
|
||
|
||
return bfd_alloc (abfd, size * nmemb);
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_zalloc
|
||
|
||
SYNOPSIS
|
||
void *bfd_zalloc (bfd *abfd, bfd_size_type wanted);
|
||
|
||
DESCRIPTION
|
||
Allocate a block of @var{wanted} bytes of zeroed memory
|
||
attached to <<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
|
||
bfd_zalloc (bfd *abfd, bfd_size_type size)
|
||
{
|
||
void *res;
|
||
|
||
res = bfd_alloc (abfd, size);
|
||
if (res)
|
||
memset (res, 0, (size_t) size);
|
||
return res;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_zalloc2
|
||
|
||
SYNOPSIS
|
||
void *bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
|
||
|
||
DESCRIPTION
|
||
Allocate a block of @var{nmemb} elements of @var{size} bytes each
|
||
of zeroed memory attached to <<abfd>> and return a pointer to it.
|
||
*/
|
||
|
||
void *
|
||
bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
|
||
{
|
||
void *res;
|
||
|
||
if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
|
||
&& size != 0
|
||
&& nmemb > ~(bfd_size_type) 0 / size)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return NULL;
|
||
}
|
||
|
||
size *= nmemb;
|
||
|
||
res = bfd_alloc (abfd, size);
|
||
if (res)
|
||
memset (res, 0, (size_t) size);
|
||
return res;
|
||
}
|
||
|
||
/* Free a block allocated for a BFD.
|
||
Note: Also frees all more recently allocated blocks! */
|
||
|
||
void
|
||
bfd_release (bfd *abfd, void *block)
|
||
{
|
||
objalloc_free_block ((struct objalloc *) abfd->memory, block);
|
||
}
|
||
|
||
|
||
/*
|
||
GNU Extension: separate debug-info files
|
||
|
||
The idea here is that a special section called .gnu_debuglink might be
|
||
embedded in a binary file, which indicates that some *other* file
|
||
contains the real debugging information. This special section contains a
|
||
filename and CRC32 checksum, which we read and resolve to another file,
|
||
if it exists.
|
||
|
||
This facilitates "optional" provision of debugging information, without
|
||
having to provide two complete copies of every binary object (with and
|
||
without debug symbols). */
|
||
|
||
#define GNU_DEBUGLINK ".gnu_debuglink"
|
||
#define GNU_DEBUGALTLINK ".gnu_debugaltlink"
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_calc_gnu_debuglink_crc32
|
||
|
||
SYNOPSIS
|
||
unsigned long bfd_calc_gnu_debuglink_crc32
|
||
(unsigned long crc, const unsigned char *buf, bfd_size_type len);
|
||
|
||
DESCRIPTION
|
||
Computes a CRC value as used in the .gnu_debuglink section.
|
||
Advances the previously computed @var{crc} value by computing
|
||
and adding in the crc32 for @var{len} bytes of @var{buf}.
|
||
|
||
RETURNS
|
||
Return the updated CRC32 value.
|
||
*/
|
||
|
||
unsigned long
|
||
bfd_calc_gnu_debuglink_crc32 (unsigned long crc,
|
||
const unsigned char *buf,
|
||
bfd_size_type len)
|
||
{
|
||
static const unsigned long crc32_table[256] =
|
||
{
|
||
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
|
||
0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
|
||
0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
|
||
0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
|
||
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
|
||
0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
|
||
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
|
||
0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
|
||
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
|
||
0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
|
||
0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
|
||
0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
|
||
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
|
||
0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
|
||
0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
|
||
0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
|
||
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
|
||
0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
|
||
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
|
||
0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
|
||
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
|
||
0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
|
||
0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
|
||
0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
|
||
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
|
||
0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
|
||
0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
|
||
0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
|
||
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
|
||
0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
|
||
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
|
||
0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
|
||
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
|
||
0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
|
||
0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
|
||
0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
|
||
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
|
||
0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
|
||
0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
|
||
0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
|
||
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
|
||
0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
|
||
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
|
||
0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
|
||
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
|
||
0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
|
||
0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
|
||
0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
|
||
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
|
||
0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
|
||
0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
|
||
0x2d02ef8d
|
||
};
|
||
const unsigned char *end;
|
||
|
||
crc = ~crc & 0xffffffff;
|
||
for (end = buf + len; buf < end; ++ buf)
|
||
crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
|
||
return ~crc & 0xffffffff;
|
||
}
|
||
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_get_debug_link_info
|
||
|
||
SYNOPSIS
|
||
char *bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out);
|
||
|
||
DESCRIPTION
|
||
Fetch the filename and CRC32 value for any separate debuginfo
|
||
associated with @var{abfd}. Return NULL if no such info found,
|
||
otherwise return filename and update @var{crc32_out}. The
|
||
returned filename is allocated with @code{malloc}; freeing it
|
||
is the responsibility of the caller.
|
||
*/
|
||
|
||
char *
|
||
bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
|
||
{
|
||
asection *sect;
|
||
unsigned long crc32;
|
||
bfd_byte *contents;
|
||
unsigned int crc_offset;
|
||
char *name;
|
||
|
||
BFD_ASSERT (abfd);
|
||
BFD_ASSERT (crc32_out);
|
||
|
||
sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
|
||
|
||
if (sect == NULL)
|
||
return NULL;
|
||
|
||
if (!bfd_malloc_and_get_section (abfd, sect, &contents))
|
||
{
|
||
if (contents != NULL)
|
||
free (contents);
|
||
return NULL;
|
||
}
|
||
|
||
/* CRC value is stored after the filename, aligned up to 4 bytes. */
|
||
name = (char *) contents;
|
||
/* PR 17597: avoid reading off the end of the buffer. */
|
||
crc_offset = strnlen (name, bfd_get_section_size (sect)) + 1;
|
||
crc_offset = (crc_offset + 3) & ~3;
|
||
if (crc_offset >= bfd_get_section_size (sect))
|
||
return NULL;
|
||
|
||
crc32 = bfd_get_32 (abfd, contents + crc_offset);
|
||
|
||
*crc32_out = crc32;
|
||
return name;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_get_alt_debug_link_info
|
||
|
||
SYNOPSIS
|
||
char *bfd_get_alt_debug_link_info (bfd * abfd,
|
||
bfd_size_type *buildid_len,
|
||
bfd_byte **buildid_out);
|
||
|
||
DESCRIPTION
|
||
Fetch the filename and BuildID value for any alternate debuginfo
|
||
associated with @var{abfd}. Return NULL if no such info found,
|
||
otherwise return filename and update @var{buildid_len} and
|
||
@var{buildid_out}. The returned filename and build_id are
|
||
allocated with @code{malloc}; freeing them is the
|
||
responsibility of the caller.
|
||
*/
|
||
|
||
char *
|
||
bfd_get_alt_debug_link_info (bfd * abfd, bfd_size_type *buildid_len,
|
||
bfd_byte **buildid_out)
|
||
{
|
||
asection *sect;
|
||
bfd_byte *contents;
|
||
unsigned int buildid_offset;
|
||
char *name;
|
||
|
||
BFD_ASSERT (abfd);
|
||
BFD_ASSERT (buildid_len);
|
||
BFD_ASSERT (buildid_out);
|
||
|
||
sect = bfd_get_section_by_name (abfd, GNU_DEBUGALTLINK);
|
||
|
||
if (sect == NULL)
|
||
return NULL;
|
||
|
||
if (!bfd_malloc_and_get_section (abfd, sect, & contents))
|
||
{
|
||
if (contents != NULL)
|
||
free (contents);
|
||
return NULL;
|
||
}
|
||
|
||
/* BuildID value is stored after the filename. */
|
||
name = (char *) contents;
|
||
buildid_offset = strnlen (name, bfd_get_section_size (sect)) + 1;
|
||
if (buildid_offset >= bfd_get_section_size (sect))
|
||
return NULL;
|
||
|
||
*buildid_len = bfd_get_section_size (sect) - buildid_offset;
|
||
*buildid_out = bfd_malloc (*buildid_len);
|
||
memcpy (*buildid_out, contents + buildid_offset, *buildid_len);
|
||
|
||
return name;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
separate_debug_file_exists
|
||
|
||
SYNOPSIS
|
||
bfd_boolean separate_debug_file_exists
|
||
(char *name, unsigned long crc32);
|
||
|
||
DESCRIPTION
|
||
Checks to see if @var{name} is a file and if its contents
|
||
match @var{crc32}.
|
||
*/
|
||
|
||
static bfd_boolean
|
||
separate_debug_file_exists (const char *name, const unsigned long crc)
|
||
{
|
||
static unsigned char buffer [8 * 1024];
|
||
unsigned long file_crc = 0;
|
||
FILE *f;
|
||
bfd_size_type count;
|
||
|
||
BFD_ASSERT (name);
|
||
|
||
f = real_fopen (name, FOPEN_RB);
|
||
if (f == NULL)
|
||
return FALSE;
|
||
|
||
while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0)
|
||
file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
|
||
|
||
fclose (f);
|
||
|
||
return crc == file_crc;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
separate_alt_debug_file_exists
|
||
|
||
SYNOPSIS
|
||
bfd_boolean separate_alt_debug_file_exists
|
||
(char *name, unsigned long crc32);
|
||
|
||
DESCRIPTION
|
||
Checks to see if @var{name} is a file and if its BuildID
|
||
matches @var{buildid}.
|
||
*/
|
||
|
||
static bfd_boolean
|
||
separate_alt_debug_file_exists (const char *name,
|
||
const unsigned long buildid ATTRIBUTE_UNUSED)
|
||
{
|
||
FILE *f;
|
||
|
||
BFD_ASSERT (name);
|
||
|
||
f = real_fopen (name, FOPEN_RB);
|
||
if (f == NULL)
|
||
return FALSE;
|
||
|
||
/* FIXME: Add code to check buildid. */
|
||
|
||
fclose (f);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
find_separate_debug_file
|
||
|
||
SYNOPSIS
|
||
char *find_separate_debug_file (bfd *abfd);
|
||
|
||
DESCRIPTION
|
||
Searches @var{abfd} for a section called @var{section_name} which
|
||
is expected to contain a reference to a file containing separate
|
||
debugging information. The function scans various locations in
|
||
the filesystem, including the file tree rooted at
|
||
@var{debug_file_directory}, and returns the first matching
|
||
filename that it finds. If @var{check_crc} is TRUE then the
|
||
contents of the file must also match the CRC value contained in
|
||
@var{section_name}. Returns NULL if no valid file could be found.
|
||
*/
|
||
|
||
typedef char * (* get_func_type) (bfd *, unsigned long *);
|
||
typedef bfd_boolean (* check_func_type) (const char *, const unsigned long);
|
||
|
||
static char *
|
||
find_separate_debug_file (bfd * abfd,
|
||
const char * debug_file_directory,
|
||
get_func_type get_func,
|
||
check_func_type check_func)
|
||
{
|
||
char *base;
|
||
char *dir;
|
||
char *debugfile;
|
||
char *canon_dir;
|
||
unsigned long crc32;
|
||
size_t dirlen;
|
||
size_t canon_dirlen;
|
||
|
||
BFD_ASSERT (abfd);
|
||
if (debug_file_directory == NULL)
|
||
debug_file_directory = ".";
|
||
|
||
/* BFD may have been opened from a stream. */
|
||
if (abfd->filename == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return NULL;
|
||
}
|
||
|
||
base = get_func (abfd, & crc32);
|
||
|
||
if (base == NULL)
|
||
return NULL;
|
||
|
||
if (base[0] == '\0')
|
||
{
|
||
free (base);
|
||
bfd_set_error (bfd_error_no_debug_section);
|
||
return NULL;
|
||
}
|
||
|
||
for (dirlen = strlen (abfd->filename); dirlen > 0; dirlen--)
|
||
if (IS_DIR_SEPARATOR (abfd->filename[dirlen - 1]))
|
||
break;
|
||
|
||
dir = (char *) bfd_malloc (dirlen + 1);
|
||
if (dir == NULL)
|
||
{
|
||
free (base);
|
||
return NULL;
|
||
}
|
||
memcpy (dir, abfd->filename, dirlen);
|
||
dir[dirlen] = '\0';
|
||
|
||
/* Compute the canonical name of the bfd object with all symbolic links
|
||
resolved, for use in the global debugfile directory. */
|
||
canon_dir = lrealpath (abfd->filename);
|
||
for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--)
|
||
if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1]))
|
||
break;
|
||
canon_dir[canon_dirlen] = '\0';
|
||
|
||
debugfile = (char *)
|
||
bfd_malloc (strlen (debug_file_directory) + 1
|
||
+ (canon_dirlen > dirlen ? canon_dirlen : dirlen)
|
||
+ strlen (".debug/")
|
||
+ strlen (base)
|
||
+ 1);
|
||
if (debugfile == NULL)
|
||
goto found; /* Actually this returns NULL. */
|
||
|
||
/* First try in the same directory as the original file: */
|
||
strcpy (debugfile, dir);
|
||
strcat (debugfile, base);
|
||
|
||
if (check_func (debugfile, crc32))
|
||
goto found;
|
||
|
||
/* Then try in a subdirectory called .debug. */
|
||
strcpy (debugfile, dir);
|
||
strcat (debugfile, ".debug/");
|
||
strcat (debugfile, base);
|
||
|
||
if (check_func (debugfile, crc32))
|
||
goto found;
|
||
|
||
/* Then try in the global debugfile directory. */
|
||
strcpy (debugfile, debug_file_directory);
|
||
dirlen = strlen (debug_file_directory) - 1;
|
||
if (dirlen > 0
|
||
&& debug_file_directory[dirlen] != '/'
|
||
&& canon_dir[0] != '/')
|
||
strcat (debugfile, "/");
|
||
strcat (debugfile, canon_dir);
|
||
strcat (debugfile, base);
|
||
|
||
if (check_func (debugfile, crc32))
|
||
goto found;
|
||
|
||
/* Failed to find the file. */
|
||
free (debugfile);
|
||
debugfile = NULL;
|
||
|
||
found:
|
||
free (base);
|
||
free (dir);
|
||
free (canon_dir);
|
||
return debugfile;
|
||
}
|
||
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_follow_gnu_debuglink
|
||
|
||
SYNOPSIS
|
||
char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir);
|
||
|
||
DESCRIPTION
|
||
|
||
Takes a BFD and searches it for a .gnu_debuglink section. If this
|
||
section is found, it examines the section for the name and checksum
|
||
of a '.debug' file containing auxiliary debugging information. It
|
||
then searches the filesystem for this .debug file in some standard
|
||
locations, including the directory tree rooted at @var{dir}, and if
|
||
found returns the full filename.
|
||
|
||
If @var{dir} is NULL, it will search a default path configured into
|
||
libbfd at build time. [XXX this feature is not currently
|
||
implemented].
|
||
|
||
RETURNS
|
||
<<NULL>> on any errors or failure to locate the .debug file,
|
||
otherwise a pointer to a heap-allocated string containing the
|
||
filename. The caller is responsible for freeing this string.
|
||
*/
|
||
|
||
char *
|
||
bfd_follow_gnu_debuglink (bfd *abfd, const char *dir)
|
||
{
|
||
return find_separate_debug_file (abfd, dir,
|
||
bfd_get_debug_link_info,
|
||
separate_debug_file_exists);
|
||
}
|
||
|
||
/* Helper for bfd_follow_gnu_debugaltlink. It just pretends to return
|
||
a CRC. .gnu_debugaltlink supplies a build-id, which is different,
|
||
but this is ok because separate_alt_debug_file_exists ignores the
|
||
CRC anyway. */
|
||
|
||
static char *
|
||
get_alt_debug_link_info_shim (bfd * abfd, unsigned long *crc32_out)
|
||
{
|
||
bfd_size_type len;
|
||
bfd_byte *buildid = NULL;
|
||
char *result = bfd_get_alt_debug_link_info (abfd, &len, &buildid);
|
||
|
||
*crc32_out = 0;
|
||
free (buildid);
|
||
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_follow_gnu_debugaltlink
|
||
|
||
SYNOPSIS
|
||
char *bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir);
|
||
|
||
DESCRIPTION
|
||
|
||
Takes a BFD and searches it for a .gnu_debugaltlink section. If this
|
||
section is found, it examines the section for the name of a file
|
||
containing auxiliary debugging information. It then searches the
|
||
filesystem for this file in a set of standard locations, including
|
||
the directory tree rooted at @var{dir}, and if found returns the
|
||
full filename.
|
||
|
||
If @var{dir} is NULL, it will search a default path configured into
|
||
libbfd at build time. [FIXME: This feature is not currently
|
||
implemented].
|
||
|
||
RETURNS
|
||
<<NULL>> on any errors or failure to locate the debug file,
|
||
otherwise a pointer to a heap-allocated string containing the
|
||
filename. The caller is responsible for freeing this string.
|
||
*/
|
||
|
||
char *
|
||
bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir)
|
||
{
|
||
return find_separate_debug_file (abfd, dir,
|
||
get_alt_debug_link_info_shim,
|
||
separate_alt_debug_file_exists);
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_create_gnu_debuglink_section
|
||
|
||
SYNOPSIS
|
||
struct bfd_section *bfd_create_gnu_debuglink_section
|
||
(bfd *abfd, const char *filename);
|
||
|
||
DESCRIPTION
|
||
|
||
Takes a @var{BFD} and adds a .gnu_debuglink section to it. The section is sized
|
||
to be big enough to contain a link to the specified @var{filename}.
|
||
|
||
RETURNS
|
||
A pointer to the new section is returned if all is ok. Otherwise <<NULL>> is
|
||
returned and bfd_error is set.
|
||
*/
|
||
|
||
asection *
|
||
bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename)
|
||
{
|
||
asection *sect;
|
||
bfd_size_type debuglink_size;
|
||
flagword flags;
|
||
|
||
if (abfd == NULL || filename == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return NULL;
|
||
}
|
||
|
||
/* Strip off any path components in filename. */
|
||
filename = lbasename (filename);
|
||
|
||
sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
|
||
if (sect)
|
||
{
|
||
/* Section already exists. */
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return NULL;
|
||
}
|
||
|
||
flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING;
|
||
sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags);
|
||
if (sect == NULL)
|
||
return NULL;
|
||
|
||
debuglink_size = strlen (filename) + 1;
|
||
debuglink_size += 3;
|
||
debuglink_size &= ~3;
|
||
debuglink_size += 4;
|
||
|
||
if (! bfd_set_section_size (abfd, sect, debuglink_size))
|
||
/* XXX Should we delete the section from the bfd ? */
|
||
return NULL;
|
||
|
||
return sect;
|
||
}
|
||
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_fill_in_gnu_debuglink_section
|
||
|
||
SYNOPSIS
|
||
bfd_boolean bfd_fill_in_gnu_debuglink_section
|
||
(bfd *abfd, struct bfd_section *sect, const char *filename);
|
||
|
||
DESCRIPTION
|
||
|
||
Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT}
|
||
and fills in the contents of the section to contain a link to the
|
||
specified @var{filename}. The filename should be relative to the
|
||
current directory.
|
||
|
||
RETURNS
|
||
<<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
|
||
and bfd_error is set.
|
||
*/
|
||
|
||
bfd_boolean
|
||
bfd_fill_in_gnu_debuglink_section (bfd *abfd,
|
||
struct bfd_section *sect,
|
||
const char *filename)
|
||
{
|
||
bfd_size_type debuglink_size;
|
||
unsigned long crc32;
|
||
char * contents;
|
||
bfd_size_type crc_offset;
|
||
FILE * handle;
|
||
static unsigned char buffer[8 * 1024];
|
||
size_t count;
|
||
size_t filelen;
|
||
|
||
if (abfd == NULL || sect == NULL || filename == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return FALSE;
|
||
}
|
||
|
||
/* Make sure that we can read the file.
|
||
XXX - Should we attempt to locate the debug info file using the same
|
||
algorithm as gdb ? At the moment, since we are creating the
|
||
.gnu_debuglink section, we insist upon the user providing us with a
|
||
correct-for-section-creation-time path, but this need not conform to
|
||
the gdb location algorithm. */
|
||
handle = real_fopen (filename, FOPEN_RB);
|
||
if (handle == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_system_call);
|
||
return FALSE;
|
||
}
|
||
|
||
crc32 = 0;
|
||
while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0)
|
||
crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count);
|
||
fclose (handle);
|
||
|
||
/* Strip off any path components in filename,
|
||
now that we no longer need them. */
|
||
filename = lbasename (filename);
|
||
|
||
filelen = strlen (filename);
|
||
debuglink_size = filelen + 1;
|
||
debuglink_size += 3;
|
||
debuglink_size &= ~3;
|
||
debuglink_size += 4;
|
||
|
||
contents = (char *) bfd_malloc (debuglink_size);
|
||
if (contents == NULL)
|
||
{
|
||
/* XXX Should we delete the section from the bfd ? */
|
||
return FALSE;
|
||
}
|
||
|
||
crc_offset = debuglink_size - 4;
|
||
memcpy (contents, filename, filelen);
|
||
memset (contents + filelen, 0, crc_offset - filelen);
|
||
|
||
bfd_put_32 (abfd, crc32, contents + crc_offset);
|
||
|
||
if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size))
|
||
{
|
||
/* XXX Should we delete the section from the bfd ? */
|
||
free (contents);
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|