| /* opncls.c -- open and close a BFD. |
| Copyright 1990-2013 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; |
| |
| 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), 13)) |
| { |
| 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; |
| } |
| |
| 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; |
| 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); |
| } |
| |
| 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. |
| */ |
| |
| 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. */ |
| 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) |
| (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. |
| */ |
| |
| 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. |
| */ |
| |
| 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 *, 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 = (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; |
| 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_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>>. |
| |
| */ |
| |
| 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; |
| } |
| |
| nbfd->filename = 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>>. |
| */ |
| |
| 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; |
| } |
| |
| 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>>. |
| */ |
| |
| 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 = (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; |
| |
| if (size != (unsigned long) size) |
| { |
| bfd_set_error (bfd_error_no_memory); |
| return NULL; |
| } |
| |
| ret = objalloc_alloc ((struct objalloc *) 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 ((struct objalloc *) abfd->memory, (unsigned long) size); |
| if (ret == NULL) |
| bfd_set_error (bfd_error_no_memory); |
| return ret; |
| } |
| |
| /* |
| 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; |
| 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; |
| } |
| |
| /* |
| FUNCTION |
| bfd_get_alt_debug_link_info |
| |
| SYNOPSIS |
| char *bfd_get_alt_debug_link_info (bfd *abfd, unsigned long *crc32_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_out}. The |
| returned filename is allocated with @code{malloc}; freeing it |
| is the responsibility of the caller. |
| */ |
| |
| char * |
| bfd_get_alt_debug_link_info (bfd * abfd, unsigned long * buildid_out) |
| { |
| asection *sect; |
| bfd_byte *contents; |
| int buildid_offset; |
| char *name; |
| |
| BFD_ASSERT (abfd); |
| 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, aligned up to 4 bytes. */ |
| name = (char *) contents; |
| buildid_offset = strlen (name) + 1; |
| buildid_offset = (buildid_offset + 3) & ~3; |
| |
| * buildid_out = bfd_get_32 (abfd, contents + buildid_offset); |
| |
| 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); |
| } |
| |
| /* |
| 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, |
| bfd_get_alt_debug_link_info, |
| 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; |
| } |