usr/src/cmd/mdb/tools/common/findscn.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <string.h>
  30 #include <libelf.h>
  31 #include <gelf.h>
  32
  33 #include <util.h>
  34
  35 int
  36 findelfsecidx(Elf *elf, char *tofind)
  37 {
  38         Elf_Scn *scn = NULL;
  39         GElf_Ehdr ehdr;
  40         GElf_Shdr shdr;
  41
  42         if (gelf_getehdr(elf, &ehdr) == NULL)
  43                 elfdie("failed to get ELF header");
  44
  45         while ((scn = elf_nextscn(elf, scn)) != NULL) {
  46                 char *name;
  47
  48                 if (gelf_getshdr(scn, &shdr) == NULL ||
  49                     (name = elf_strptr(elf, ehdr.e_shstrndx,
  50                     (size_t)shdr.sh_name)) == NULL)
  51                         elfdie("failed to get section header");
  52
  53                 if (strcmp(name, tofind) == 0)
  54                         return (elf_ndxscn(scn));
  55         }
  56
  57         return (-1);
  58 }