lib/libelf/elf_shstrndx.c

   1 /*-
   2  * Copyright (c) 2006,2008 Joseph Koshy
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28
  29 #include <ar.h>
  30 #include <libelf.h>
  31
  32 #include "_libelf.h"
  33
  34 LIBELF_VCSID("$Id$");
  35
  36 static int
  37 _libelf_getshdrstrndx(Elf *e, size_t *strndx)
  38 {
  39         void *eh;
  40         int ec;
  41
  42         if (e == NULL || e->e_kind != ELF_K_ELF ||
  43             ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
  44                 LIBELF_SET_ERROR(ARGUMENT, 0);
  45                 return (-1);
  46         }
  47
  48         if ((eh = _libelf_ehdr(e, ec, 0)) == NULL)
  49                 return (-1);
  50
  51         *strndx = e->e_u.e_elf.e_strndx;
  52
  53         return (0);
  54 }
  55
  56 int
  57 elf_getshdrstrndx(Elf *e, size_t *strndx)
  58 {
  59         return (_libelf_getshdrstrndx(e, strndx));
  60 }
  61
  62 int
  63 elf_getshstrndx(Elf *e, size_t *strndx) /* Deprecated API. */
  64 {
  65         return (_libelf_getshdrstrndx(e, strndx) >= 0);
  66 }
  67
  68 int
  69 elf_setshstrndx(Elf *e, size_t strndx)
  70 {
  71         void *eh;
  72         int ec;
  73
  74         if (e == NULL || e->e_kind != ELF_K_ELF ||
  75             ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) ||
  76             ((eh = _libelf_ehdr(e, ec, 0)) == NULL)) {
  77                 LIBELF_SET_ERROR(ARGUMENT, 0);
  78                 return (0);
  79         }
  80
  81         return (_libelf_setshstrndx(e, eh, ec, strndx));
  82 }