diff options
Diffstat (limited to 'src/libelf/gelf_update_shdr.c')
| -rw-r--r-- | src/libelf/gelf_update_shdr.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/libelf/gelf_update_shdr.c b/src/libelf/gelf_update_shdr.c new file mode 100644 index 00000000..c4e38294 --- /dev/null +++ b/src/libelf/gelf_update_shdr.c @@ -0,0 +1,132 @@ +/* Update section header. + Copyright (C) 2000, 2001, 2002, 2010 Red Hat, Inc. + This file is part of Red Hat elfutils. + Written by Ulrich Drepper <drepper@redhat.com>, 2000. + + 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 <string.h> + +#include "libelfP.h" + + +int +gelf_update_shdr (Elf_Scn *scn, GElf_Shdr *src) +{ + int result = 0; + Elf *elf; + + if (scn == NULL || src == NULL) + return 0; + + elf = scn->elf; + rwlock_wrlock (elf->lock); + + if (elf->class == ELFCLASS32) + { + Elf32_Shdr *shdr + = scn->shdr.e32 ?: __elf32_getshdr_wrlock (scn); + + if (shdr == NULL) + { + __libelf_seterrno (ELF_E_INVALID_OPERAND); + goto out; + } + + if (unlikely (src->sh_flags > 0xffffffffull) + || unlikely (src->sh_addr > 0xffffffffull) + || unlikely (src->sh_offset > 0xffffffffull) + || unlikely (src->sh_size > 0xffffffffull) + || unlikely (src->sh_addralign > 0xffffffffull) + || unlikely (src->sh_entsize > 0xffffffffull)) + { + __libelf_seterrno (ELF_E_INVALID_DATA); + goto out; + } + +#define COPY(name) \ + shdr->name = src->name + COPY (sh_name); + COPY (sh_type); + COPY (sh_flags); + COPY (sh_addr); + COPY (sh_offset); + COPY (sh_size); + COPY (sh_link); + COPY (sh_info); + COPY (sh_addralign); + COPY (sh_entsize); + } + else + { + Elf64_Shdr *shdr + = scn->shdr.e64 ?: __elf64_getshdr_wrlock (scn); + + if (shdr == NULL) + { + __libelf_seterrno (ELF_E_INVALID_OPERAND); + goto out; + } + + /* We only have to copy the data. */ + (void) memcpy (shdr, src, sizeof (GElf_Shdr)); + } + + /* Mark the section header as modified. */ + scn->shdr_flags |= ELF_F_DIRTY; + + result = 1; + + out: + rwlock_unlock (elf->lock); + + return result; +} |