| /* Return number of program headers in the ELF file. |
| Copyright (C) 2010 Red Hat, Inc. |
| This file is part of Red Hat elfutils. |
| |
| 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 <gelf.h> |
| #include <stddef.h> |
| |
| #include "libelfP.h" |
| |
| |
| int |
| __elf_getphdrnum_rdlock (elf, dst) |
| Elf *elf; |
| size_t *dst; |
| { |
| if (unlikely (elf->state.elf64.ehdr == NULL)) |
| { |
| /* Maybe no ELF header was created yet. */ |
| __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); |
| return -1; |
| } |
| |
| *dst = (elf->class == ELFCLASS32 |
| ? elf->state.elf32.ehdr->e_phnum |
| : elf->state.elf64.ehdr->e_phnum); |
| |
| if (*dst == PN_XNUM) |
| { |
| const Elf_ScnList *const scns = (elf->class == ELFCLASS32 |
| ? &elf->state.elf32.scns |
| : &elf->state.elf64.scns); |
| |
| /* If there are no section headers, perhaps this is really just 65536 |
| written without PN_XNUM support. Either that or it's bad data. */ |
| |
| if (likely (scns->cnt > 0)) |
| *dst = (elf->class == ELFCLASS32 |
| ? scns->data[0].shdr.e32->sh_info |
| : scns->data[0].shdr.e64->sh_info); |
| } |
| |
| return 0; |
| } |
| |
| int |
| elf_getphdrnum (elf, dst) |
| Elf *elf; |
| size_t *dst; |
| { |
| int result; |
| |
| if (elf == NULL) |
| return -1; |
| |
| if (unlikely (elf->kind != ELF_K_ELF)) |
| { |
| __libelf_seterrno (ELF_E_INVALID_HANDLE); |
| return -1; |
| } |
| |
| rwlock_rdlock (elf->lock); |
| result = __elf_getphdrnum_rdlock (elf, dst); |
| rwlock_unlock (elf->lock); |
| |
| return result; |
| } |