diff options
Diffstat (limited to 'libelf/gelf_getehdr.c')
| -rw-r--r-- | libelf/gelf_getehdr.c | 140 |
1 files changed, 92 insertions, 48 deletions
diff --git a/libelf/gelf_getehdr.c b/libelf/gelf_getehdr.c index 6b926442..34b5db3e 100644 --- a/libelf/gelf_getehdr.c +++ b/libelf/gelf_getehdr.c @@ -1,32 +1,67 @@ /* Get ELF header. - Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Red Hat, Inc. + This file is part of Red Hat elfutils. Written 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. */ + Red Hat elfutils 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 of the License. + + Red Hat elfutils 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 Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + In addition, as a special exception, Red Hat, Inc. gives You the + additional right to link the code of Red Hat elfutils with code licensed + under any Open Source Initiative certified open source license + (http://www.opensource.org/licenses/index.php) which requires the + distribution of source code with any binary distribution and to + distribute linked combinations of the two. Non-GPL Code permitted under + this exception must only link to the code of Red Hat elfutils through + those well defined interfaces identified in the file named EXCEPTION + found in the source code files (the "Approved Interfaces"). The files + of Non-GPL Code may instantiate templates or use macros or inline + functions from the Approved Interfaces without causing the resulting + work to be covered by the GNU General Public License. Only Red Hat, + Inc. may make changes or additions to the list of Approved Interfaces. + Red Hat's grant of this exception is conditioned upon your not adding + any new exceptions. If you wish to add a new Approved Interface or + exception, please contact Red Hat. You must obey the GNU General Public + License in all respects for all of the Red Hat elfutils code and other + code used in conjunction with Red Hat elfutils except the Non-GPL Code + covered by this exception. If you modify this file, you may extend this + exception to your version of the file, but you are not obligated to do + so. If you do not wish to provide this exception without modification, + you must delete this exception statement from your version and license + this file solely under the GPL without exception. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <gelf.h> +#include <stddef.h> +#include <stdlib.h> #include <string.h> #include "libelfP.h" GElf_Ehdr * -gelf_getehdr (elf, dest) +__gelf_getehdr_rdlock (elf, dest) Elf *elf; GElf_Ehdr *dest; { @@ -41,47 +76,56 @@ gelf_getehdr (elf, dest) return NULL; } - rwlock_rdlock (elf->lock); - - if (elf->class == ELFCLASS32) + /* The following is an optimization: the ehdr element is at the same + position in both the elf32 and elf64 structure. */ + if (offsetof (struct Elf, state.elf32.ehdr) + != offsetof (struct Elf, state.elf64.ehdr)) + abort (); + /* Just pick one of the values. */ + if (unlikely (elf->state.elf64.ehdr == NULL)) + /* Maybe no ELF header was created yet. */ + __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); + else if (elf->class == ELFCLASS32) { Elf32_Ehdr *ehdr = elf->state.elf32.ehdr; - /* Maybe no ELF header was created yet. */ - if (ehdr == NULL) - __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); - else - { - /* Convert the 32-bit struct to an 64-bit one. */ - memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); + /* Convert the 32-bit struct to an 64-bit one. */ + memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); #define COPY(name) \ - dest->name = ehdr->name - COPY (e_type); - COPY (e_machine); - COPY (e_version); - COPY (e_entry); - COPY (e_phoff); - COPY (e_shoff); - COPY (e_flags); - COPY (e_ehsize); - COPY (e_phentsize); - COPY (e_phnum); - COPY (e_shentsize); - COPY (e_shnum); - COPY (e_shstrndx); - - result = dest; - } + dest->name = ehdr->name + COPY (e_type); + COPY (e_machine); + COPY (e_version); + COPY (e_entry); + COPY (e_phoff); + COPY (e_shoff); + COPY (e_flags); + COPY (e_ehsize); + COPY (e_phentsize); + COPY (e_phnum); + COPY (e_shentsize); + COPY (e_shnum); + COPY (e_shstrndx); + + result = dest; } else - { - /* Maybe no ELF header was created yet. */ - if (elf->state.elf64.ehdr == NULL) - __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); - else - result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); - } + result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); + + return result; +} +GElf_Ehdr * +gelf_getehdr (elf, dest) + Elf *elf; + GElf_Ehdr *dest; +{ + GElf_Ehdr *result; + if (elf == NULL) + return NULL; + + rwlock_rdlock (elf->lock); + result = __gelf_getehdr_rdlock (elf, dest); rwlock_unlock (elf->lock); return result; |