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dwarf_str.c revision 1.1.1.2 
      1 /*	$NetBSD: dwarf_str.c,v 1.1.1.2 2016/02/20 02:42:00 christos Exp $	*/
      2 /*-
      3  * Copyright (c) 2009 Kai Wang
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include "_libdwarf.h"
     29 
     30 __RCSID("$NetBSD: dwarf_str.c,v 1.1.1.2 2016/02/20 02:42:00 christos Exp $");
     31 ELFTC_VCSID("Id: dwarf_str.c 3295 2016-01-08 22:08:10Z jkoshy ");
     32 
     33 int
     34 dwarf_get_str(Dwarf_Debug dbg, Dwarf_Off offset, char **string,
     35     Dwarf_Signed *ret_strlen, Dwarf_Error *error)
     36 {
     37 	Dwarf_Section *ds;
     38 
     39 	if (dbg == NULL || string == NULL || ret_strlen == NULL) {
     40 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
     41 		return (DW_DLV_ERROR);
     42 	}
     43 
     44 	ds = _dwarf_find_section(dbg, ".debug_str");
     45 	if (ds == NULL) {
     46 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
     47 		return (DW_DLV_NO_ENTRY);
     48 	}
     49 
     50 	if (offset > ds->ds_size) {
     51 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
     52 		return (DW_DLV_ERROR);
     53 	}
     54 
     55 	if (offset == ds->ds_size) {
     56 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
     57 		return (DW_DLV_NO_ENTRY);
     58 	}
     59 
     60 	*string = (char *) ds->ds_data + offset;
     61 	*ret_strlen = strlen(*string);
     62 
     63 	return (DW_DLV_OK);
     64 }
     65