diff options
author | Ulrich Drepper <drepper@redhat.com> | 2005-07-26 05:00:05 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2005-07-26 05:00:05 +0000 |
commit | b08d5a8fb42f4586d756068065186b5af7e48dad (patch) | |
tree | 9f05f86be7877ed461b4dc05f53b29ea4fc0d2a1 /libelf/elf_readall.c |
Adjust for monotone.
Diffstat (limited to 'libelf/elf_readall.c')
-rw-r--r-- | libelf/elf_readall.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/libelf/elf_readall.c b/libelf/elf_readall.c new file mode 100644 index 00000000..d36da270 --- /dev/null +++ b/libelf/elf_readall.c @@ -0,0 +1,116 @@ +/* Read all of the file associated with the descriptor. + Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. + Contributed by Ulrich Drepper <drepper@redhat.com>, 1998. + + 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, version 2. + + 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <unistd.h> + +#include "libelfP.h" +#include "common.h" + + +static void +set_address (Elf *elf, size_t offset) +{ + if (elf->kind == ELF_K_AR) + { + Elf *child = elf->state.ar.children; + + while (child != NULL) + { + if (child->map_address == NULL) + { + child->map_address = elf->map_address; + child->start_offset -= offset; + if (child->kind == ELF_K_AR) + child->state.ar.offset -= offset; + + set_address (child, offset); + } + + child = child->next; + } + } +} + + +char * +__libelf_readall (elf) + Elf *elf; +{ + /* Get the file. */ + rwlock_wrlock (elf->lock); + + if (elf->map_address == NULL && unlikely (elf->fildes == -1)) + { + __libelf_seterrno (ELF_E_INVALID_HANDLE); + rwlock_unlock (elf->lock); + return NULL; + } + + /* If the file is not mmap'ed and not previously loaded, do it now. */ + if (elf->map_address == NULL) + { + char *mem; + + /* If this is an archive and we have derived descriptors get the + locks for all of them. */ + libelf_acquire_all (elf); + + /* Allocate all the memory we need. */ + mem = (char *) malloc (elf->maximum_size); + if (mem != NULL) + { + /* Read the file content. */ + if ((size_t) pread (elf->fildes, mem, elf->maximum_size, + elf->start_offset) != elf->maximum_size) + { + /* Something went wrong. */ + __libelf_seterrno (ELF_E_READ_ERROR); + free (mem); + } + else + { + /* Remember the address. */ + elf->map_address = mem; + + /* Also remember that we allocated the memory. */ + elf->flags |= ELF_F_MALLOCED; + + /* Propagate the information down to all children and + their children. */ + set_address (elf, elf->start_offset); + + /* Correct the own offsets. */ + if (elf->kind == ELF_K_AR) + elf->state.ar.offset -= elf->start_offset; + elf->start_offset = 0; + } + } + else + __libelf_seterrno (ELF_E_NOMEM); + + /* Free the locks on the children. */ + libelf_release_all (elf); + } + + rwlock_unlock (elf->lock); + + return (char *) elf->map_address; +} |