diff options
Diffstat (limited to 'binutils-2.17/bfd/opncls.c')
| -rw-r--r-- | binutils-2.17/bfd/opncls.c | 1452 |
1 files changed, 0 insertions, 1452 deletions
diff --git a/binutils-2.17/bfd/opncls.c b/binutils-2.17/bfd/opncls.c deleted file mode 100644 index b02b1378..00000000 --- a/binutils-2.17/bfd/opncls.c +++ /dev/null @@ -1,1452 +0,0 @@ -/* opncls.c -- open and close a BFD. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, - 2001, 2002, 2003, 2004, 2005, 2006 - 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 2 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 "bfd.h" -#include "sysdep.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 - -/* Counter used to initialize the bfd identifier. */ - -static unsigned int _bfd_id_counter = 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_zmalloc (sizeof (bfd)); - if (nbfd == NULL) - return NULL; - - 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; - - nbfd->direction = no_direction; - nbfd->iostream = NULL; - nbfd->where = 0; - if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc, - sizeof (struct section_hash_entry), 251)) - { - free (nbfd); - return NULL; - } - nbfd->sections = NULL; - nbfd->section_last = NULL; - nbfd->format = bfd_unknown; - nbfd->my_archive = NULL; - nbfd->origin = 0; - nbfd->opened_once = FALSE; - nbfd->output_has_begun = FALSE; - nbfd->section_count = 0; - nbfd->usrdata = NULL; - nbfd->cacheable = FALSE; - nbfd->flags = BFD_NO_FLAGS; - nbfd->mtime_set = FALSE; - - return nbfd; -} - -/* 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; - nbfd->my_archive = obfd; - nbfd->direction = read_direction; - nbfd->target_defaulted = obfd->target_defaulted; - return nbfd; -} - -/* Delete a BFD. */ - -void -_bfd_delete_bfd (bfd *abfd) -{ - bfd_hash_table_free (&abfd->section_htab); - objalloc_free ((struct objalloc *) abfd->memory); - free (abfd); -} - -/* -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. -*/ - -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) - return NULL; - - target_vec = bfd_find_target (target, nbfd); - if (target_vec == NULL) - { - _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. */ - nbfd->filename = 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) - 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. -*/ - -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>>. -*/ - -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) - { - 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 *, const char *, void *); - -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. -*/ - -bfd * -bfd_openstreamr (const char *filename, const char *target, void *streamarg) -{ - FILE *stream = 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; - nbfd->filename = 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) (struct bfd *nbfd, - void *open_closure), - void *open_closure, - file_ptr (*pread) (struct bfd *nbfd, - void *stream, - void *buf, - file_ptr nbytes, - file_ptr offset), - int (*close) (struct bfd *nbfd, - void *stream)); - -DESCRIPTION - - Create and return a BFD backed by a read-only @var{stream}. - The @var{stream} is created using @var{open}, accessed using - @var{pread} and destroyed using @var{close}. - - Calls <<bfd_find_target>>, so @var{target} is interpreted as by - that function. - - Calls @var{open} (which can call <<bfd_zalloc>> and - <<bfd_get_filename>>) to obtain the read-only stream backing - the BFD. @var{open} either succeeds returning the - non-<<NULL>> @var{stream}, or fails returning <<NULL>> - (setting <<bfd_error>>). - - Calls @var{pread} to request @var{nbytes} of data from - @var{stream} starting at @var{offset} (e.g., via a call to - <<bfd_read>>). @var{pread} 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} when the BFD is later closed using - <<bfd_close>>. @var{close} either succeeds returning 0, or - fails returning -1 (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>>. - -*/ - -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); - file_ptr where; -}; - -static file_ptr -opncls_btell (struct bfd *abfd) -{ - struct opncls *vec = abfd->iostream; - return vec->where; -} - -static int -opncls_bseek (struct bfd *abfd, file_ptr offset, int whence) -{ - struct opncls *vec = 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 = 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 = 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 ATTRIBUTE_UNUSED, struct stat *sb) -{ - memset (sb, 0, sizeof (*sb)); - return 0; -} - -static const struct bfd_iovec opncls_iovec = { - &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek, - &opncls_bclose, &opncls_bflush, &opncls_bstat -}; - -bfd * -bfd_openr_iovec (const char *filename, const char *target, - void *(*open) (struct bfd *nbfd, - void *open_closure), - void *open_closure, - file_ptr (*pread) (struct bfd *abfd, - void *stream, - void *buf, - file_ptr nbytes, - file_ptr offset), - int (*close) (struct bfd *nbfd, - void *stream)) -{ - 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; - } - - nbfd->filename = filename; - nbfd->direction = read_direction; - - stream = open (nbfd, open_closure); - if (stream == NULL) - { - _bfd_delete_bfd (nbfd); - return NULL; - } - - vec = bfd_zalloc (nbfd, sizeof (struct opncls)); - vec->stream = stream; - vec->pread = pread; - vec->close = close; - - 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>>. -*/ - -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; - } - - nbfd->filename = 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; -} - -/* - -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; - - /* FIXME: cagney/2004-02-15: Need to implement a BFD_IN_MEMORY io - vector. */ - if (!(abfd->flags & BFD_IN_MEMORY)) - ret = abfd->iovec->bclose (abfd); - else - ret = TRUE; - - /* If the file was open for writing and is now executable, - make it so. */ - if (ret - && abfd->direction == write_direction - && abfd->flags & EXEC_P) - { - struct stat buf; - - if (stat (abfd->filename, &buf) == 0) - { - unsigned int mask = umask (0); - - umask (mask); - chmod (abfd->filename, - (0777 - & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask)))); - } - } - - _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 the file was open for writing and is now executable, - make it so. */ - if (ret - && abfd->direction == write_direction - && abfd->flags & EXEC_P) - { - struct stat buf; - - if (stat (abfd->filename, &buf) == 0) - { - unsigned int mask = umask (0); - - umask (mask); - chmod (abfd->filename, - (0777 - & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask)))); - } - } - - _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{template}. The format is always set to <<bfd_object>>. -*/ - -bfd * -bfd_create (const char *filename, bfd *templ) -{ - bfd *nbfd; - - nbfd = _bfd_new_bfd (); - if (nbfd == NULL) - return NULL; - nbfd->filename = 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 = bfd_malloc (sizeof (struct bfd_in_memory)); - abfd->iostream = bim; - /* bfd_bwrite will grow these as needed. */ - bim->size = 0; - bim->buffer = 0; - - abfd->flags |= BFD_IN_MEMORY; - 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; -} - -/* -INTERNAL_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; - - if (size != (unsigned long) size) - { - bfd_set_error (bfd_error_no_memory); - return NULL; - } - - ret = objalloc_alloc (abfd->memory, (unsigned long) 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) -{ - void *ret; - - 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; - - if (size != (unsigned long) size) - { - bfd_set_error (bfd_error_no_memory); - return NULL; - } - - ret = objalloc_alloc (abfd->memory, (unsigned long) size); - if (ret == NULL) - bfd_set_error (bfd_error_no_memory); - return ret; -} - -/* -INTERNAL_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" -/* -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;; -} - - -/* -INTERNAL_FUNCTION - get_debug_link_info - -SYNOPSIS - char *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}. -*/ - -static char * -get_debug_link_info (bfd *abfd, unsigned long *crc32_out) -{ - asection *sect; - unsigned long crc32; - bfd_byte *contents; - 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; - crc_offset = strlen (name) + 1; - crc_offset = (crc_offset + 3) & ~3; - - crc32 = bfd_get_32 (abfd, contents + crc_offset); - - *crc32_out = crc32; - 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; - int fd; - bfd_size_type count; - - BFD_ASSERT (name); - - fd = open (name, O_RDONLY); - if (fd < 0) - return FALSE; - - while ((count = read (fd, buffer, sizeof (buffer))) > 0) - file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); - - close (fd); - - return crc == file_crc; -} - - -/* -INTERNAL_FUNCTION - find_separate_debug_file - -SYNOPSIS - char *find_separate_debug_file (bfd *abfd); - -DESCRIPTION - Searches @var{abfd} for a reference to separate debugging - information, scans various locations in the filesystem, including - the file tree rooted at @var{debug_file_directory}, and returns a - filename of such debugging information if the file is found and has - matching CRC32. Returns NULL if no reference to debugging file - exists, or file cannot be found. -*/ - -static char * -find_separate_debug_file (bfd *abfd, const char *debug_file_directory) -{ - char *basename; - char *dir; - char *debugfile; - unsigned long crc32; - int i; - - BFD_ASSERT (abfd); - if (debug_file_directory == NULL) - debug_file_directory = "."; - - /* BFD may have been opened from a stream. */ - if (! abfd->filename) - return NULL; - - basename = get_debug_link_info (abfd, & crc32); - if (basename == NULL) - return NULL; - - if (strlen (basename) < 1) - { - free (basename); - return NULL; - } - - dir = strdup (abfd->filename); - if (dir == NULL) - { - free (basename); - return NULL; - } - BFD_ASSERT (strlen (dir) != 0); - - /* Strip off filename part. */ - for (i = strlen (dir) - 1; i >= 0; i--) - if (IS_DIR_SEPARATOR (dir[i])) - break; - - dir[i + 1] = '\0'; - BFD_ASSERT (dir[i] == '/' || dir[0] == '\0'); - - debugfile = malloc (strlen (debug_file_directory) + 1 - + strlen (dir) - + strlen (".debug/") - + strlen (basename) - + 1); - if (debugfile == NULL) - { - free (basename); - free (dir); - return NULL; - } - - /* First try in the same directory as the original file: */ - strcpy (debugfile, dir); - strcat (debugfile, basename); - - if (separate_debug_file_exists (debugfile, crc32)) - { - free (basename); - free (dir); - return debugfile; - } - - /* Then try in a subdirectory called .debug. */ - strcpy (debugfile, dir); - strcat (debugfile, ".debug/"); - strcat (debugfile, basename); - - if (separate_debug_file_exists (debugfile, crc32)) - { - free (basename); - free (dir); - return debugfile; - } - - /* Then try in the global debugfile directory. */ - strcpy (debugfile, debug_file_directory); - i = strlen (debug_file_directory) - 1; - if (i > 0 - && debug_file_directory[i] != '/' - && dir[0] != '/') - strcat (debugfile, "/"); - strcat (debugfile, dir); - strcat (debugfile, basename); - - if (separate_debug_file_exists (debugfile, crc32)) - { - free (basename); - free (dir); - return debugfile; - } - - free (debugfile); - free (basename); - free (dir); - return NULL; -} - - -/* -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); -} - -/* -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; - - 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; - } - - sect = bfd_make_section (abfd, GNU_DEBUGLINK); - if (sect == NULL) - return NULL; - - if (! bfd_set_section_flags (abfd, sect, - SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING)) - /* XXX Should we delete the section from the bfd ? */ - 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; - - 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); - - debuglink_size = strlen (filename) + 1; - debuglink_size += 3; - debuglink_size &= ~3; - debuglink_size += 4; - - contents = malloc (debuglink_size); - if (contents == NULL) - { - /* XXX Should we delete the section from the bfd ? */ - bfd_set_error (bfd_error_no_memory); - return FALSE; - } - - strcpy (contents, filename); - crc_offset = debuglink_size - 4; - - 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; -} |