usr/src/cmd/sgs/libelf/common/getshstrndx.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <string.h>
  27 #include <gelf.h>
  28 #include <decl.h>
  29 #include <msg.h>
  30
  31 /*
  32  * Return section header array string table index, taking
  33  * extended headers into account.
  34  *
  35  * elf_getshstrndx() returns 0 for failure, and 1 for success.
  36  *
  37  * elf_getshdrstrndx() supercedes elf_getshstrndx(), which is now considered
  38  * obsolete. It returns -1 for failure and 0 for success, bringing us into
  39  * alignment with the interface agreed to in the 2002 gABI meeting.
  40  *
  41  * See the comment in getshnum.c for additional information.
  42  */
  43
  44 int
  45 elf_getshdrstrndx(Elf *elf, size_t *shstrndx)
  46 {
  47         GElf_Ehdr       ehdr;
  48         Elf_Scn         *scn;
  49         GElf_Shdr       shdr0;
  50
  51         if (gelf_getehdr(elf, &ehdr) == 0)
  52                 return (-1);
  53         if (ehdr.e_shstrndx != SHN_XINDEX) {
  54                 *shstrndx = ehdr.e_shstrndx;
  55                 return (0);
  56         }
  57         if ((scn = elf_getscn(elf, 0)) == 0)
  58                 return (-1);
  59         if (gelf_getshdr(scn, &shdr0) == 0)
  60                 return (-1);
  61         *shstrndx = shdr0.sh_link;
  62         return (0);
  63 }
  64
  65 int
  66 elf_getshstrndx(Elf *elf, size_t *shstrndx)
  67 {
  68         return (elf_getshdrstrndx(elf, shstrndx) == 0);
  69 }