diff options
Diffstat (limited to '0.153/libelf/elf32_offscn.c')
-rw-r--r-- | 0.153/libelf/elf32_offscn.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/0.153/libelf/elf32_offscn.c b/0.153/libelf/elf32_offscn.c new file mode 100644 index 00000000..86eff8b1 --- /dev/null +++ b/0.153/libelf/elf32_offscn.c @@ -0,0 +1,121 @@ +/* Get section at specific index. + Copyright (C) 2005, 2008 Red Hat, Inc. + This file is part of Red Hat elfutils. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2005. + + 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 <assert.h> +#include <stddef.h> +#include <stdlib.h> + +#include "libelfP.h" + +#ifndef LIBELFBITS +# define LIBELFBITS 32 +#endif + + +Elf_Scn * +elfw2(LIBELFBITS,offscn) (elf, offset) + Elf *elf; + ElfW2(LIBELFBITS,Off) offset; +{ + if (elf == NULL) + return NULL; + + if (unlikely (elf->kind != ELF_K_ELF)) + { + __libelf_seterrno (ELF_E_INVALID_HANDLE); + return NULL; + } + + Elf_ScnList *runp = &elf->state.ELFW(elf,LIBELFBITS).scns; + + /* If we have not looked at section headers before, + we might need to read them in first. */ + if (runp->cnt > 0 + && unlikely (runp->data[0].shdr.ELFW(e,LIBELFBITS) == NULL) + && unlikely (elfw2(LIBELFBITS,getshdr) (&runp->data[0]) == NULL)) + return NULL; + + rwlock_rdlock (elf->lock); + + Elf_Scn *result = NULL; + + /* Find the section in the list. */ + while (1) + { + for (unsigned int i = 0; i < runp->cnt; ++i) + if (runp->data[i].shdr.ELFW(e,LIBELFBITS)->sh_offset == offset) + { + result = &runp->data[i]; + + /* If this section is empty, the following one has the same + sh_offset. We presume the caller is looking for a nonempty + section, so keep looking if this one is empty. */ + if (runp->data[i].shdr.ELFW(e,LIBELFBITS)->sh_size != 0) + goto out; + } + + runp = runp->next; + if (runp == NULL) + { + __libelf_seterrno (ELF_E_INVALID_OFFSET); + break; + } + } + + out: + rwlock_unlock (elf->lock); + + return result; +} +INTDEF(elfw2(LIBELFBITS,offscn)) |