external/bsd/elftoolchain/dist/libdwarf/dwarf_str.c

   1 /*      $NetBSD: dwarf_str.c,v 1.2 2014/03/09 16:58:04 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2009 Kai Wang
   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 "_libdwarf.h"
  30
  31 __RCSID("$NetBSD: dwarf_str.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
  32 ELFTC_VCSID("Id: dwarf_str.c 2075 2011-10-27 03:47:28Z jkoshy ");
  33
  34 int
  35 dwarf_get_str(Dwarf_Debug dbg, Dwarf_Off offset, char **string,
  36     Dwarf_Signed *ret_strlen, Dwarf_Error *error)
  37 {
  38         Dwarf_Section *ds;
  39
  40         if (dbg == NULL || offset < 0 || string == NULL || ret_strlen == NULL) {
  41                 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
  42                 return (DW_DLV_ERROR);
  43         }
  44
  45         ds = _dwarf_find_section(dbg, ".debug_str");
  46         if (ds == NULL) {
  47                 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
  48                 return (DW_DLV_NO_ENTRY);
  49         }
  50
  51         if ((Dwarf_Unsigned) offset > ds->ds_size) {
  52                 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
  53                 return (DW_DLV_ERROR);
  54         }
  55
  56         if ((Dwarf_Unsigned) offset == ds->ds_size) {
  57                 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
  58                 return (DW_DLV_NO_ENTRY);
  59         }
  60
  61         *string = (char *) ds->ds_data + offset;
  62         *ret_strlen = strlen(*string);
  63
  64         return (DW_DLV_OK);
  65 }