diff options
Diffstat (limited to 'libelf/elf_nextscn.c')
| -rw-r--r-- | libelf/elf_nextscn.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/libelf/elf_nextscn.c b/libelf/elf_nextscn.c new file mode 100644 index 0000000..a1842bb --- /dev/null +++ b/libelf/elf_nextscn.c @@ -0,0 +1,110 @@ +/* Get next section. + Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. + This file is part of Red Hat elfutils. + Contributed by Ulrich Drepper <drepper@redhat.com>, 1998. + + 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 <libelf.h> +#include <stddef.h> + +#include "libelfP.h" + + +Elf_Scn * +elf_nextscn (elf, scn) + Elf *elf; + Elf_Scn *scn; +{ + Elf_Scn *result = NULL; + + if (elf == NULL) + return NULL; + + rwlock_rdlock (elf->lock); + + if (scn == NULL) + { + /* If no section handle is given return the first (not 0th) section. */ + if (elf->class == ELFCLASS32 + || (offsetof (Elf, state.elf32.scns) + == offsetof (Elf, state.elf64.scns))) + { + if (elf->state.elf32.scns.cnt > 1) + result = &elf->state.elf32.scns.data[1]; + } + else + { + if (elf->state.elf64.scns.cnt > 1) + result = &elf->state.elf64.scns.data[1]; + } + } + else + { + Elf_ScnList *list = scn->list; + + if (scn + 1 < &list->data[list->cnt]) + result = scn + 1; + else if (scn + 1 == &list->data[list->max] + && (list = list->next) != NULL) + { + /* If there is another element in the section list it must + have at least one entry. */ + assert (list->cnt > 0); + result = &list->data[0]; + } + } + + rwlock_unlock (elf->lock); + + return result; +} +INTDEF(elf_nextscn) |