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dwarf_str.c revision 1.2 
      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 }
     66