external/bsd/elftoolchain/dist/libelf/elf_shnum.c

   1 /*      $NetBSD: elf_shnum.c,v 1.2 2014/03/09 16:58:04 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2006,2008 Joseph Koshy
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30
  31 #include <ar.h>
  32 #include <libelf.h>
  33
  34 #include "_libelf.h"
  35
  36 __RCSID("$NetBSD: elf_shnum.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
  37 ELFTC_VCSID("Id: elf_shnum.c 2225 2011-11-26 18:55:54Z jkoshy ");
  38
  39 static int
  40 _libelf_getshdrnum(Elf *e, size_t *shnum)
  41 {
  42         void *eh;
  43         int ec;
  44
  45         if (e == NULL || e->e_kind != ELF_K_ELF ||
  46             ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
  47                 LIBELF_SET_ERROR(ARGUMENT, 0);
  48                 return (-1);
  49         }
  50
  51         if ((eh = _libelf_ehdr(e, ec, 0)) == NULL)
  52                 return (-1);
  53
  54         *shnum = e->e_u.e_elf.e_nscn;
  55
  56         return (0);
  57 }
  58
  59 int
  60 elf_getshdrnum(Elf *e, size_t *shnum)
  61 {
  62         return (_libelf_getshdrnum(e, shnum));
  63 }
  64
  65 /* Deprecated API. */
  66 int
  67 elf_getshnum(Elf *e, size_t *shnum)
  68 {
  69         return (_libelf_getshdrnum(e, shnum) >= 0);
  70 }