1/*- 2 * Copyright (c) 2007 John Birrell (jb@freebsd.org) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29#include <stdlib.h> 30#include <string.h> 31#include "_libdwarf.h" 32 33int 34dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp, Dwarf_Error *err) 35{ 36 Dwarf_Attribute at; 37 Dwarf_Abbrev a; 38 int ret = DWARF_E_NONE; 39 40 if (err == NULL) 41 return DWARF_E_ERROR; 42 43 if (die == NULL || atp == NULL || (a = die->die_a) == NULL) { 44 DWARF_SET_ERROR(err, DWARF_E_ARGUMENT); 45 return DWARF_E_ARGUMENT; 46 } 47 48 STAILQ_FOREACH(at, &a->a_attrib, at_next) 49 if (at->at_attrib == attr) 50 break; 51 52 *atp = at; 53 54 if (at == NULL) { 55 DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY); 56 ret = DWARF_E_NO_ENTRY; 57 } 58 59 return ret; 60} 61 62int 63dwarf_attr_add(Dwarf_Abbrev a, uint64_t attr, uint64_t form, Dwarf_Attribute *atp, Dwarf_Error *error) 64{ 65 Dwarf_Attribute at; 66 int ret = DWARF_E_NONE; 67 68 if (error == NULL) 69 return DWARF_E_ERROR; 70 71 if (a == NULL) { 72 DWARF_SET_ERROR(error, DWARF_E_ARGUMENT); 73 return DWARF_E_ARGUMENT; 74 } 75 76 if ((at = malloc(sizeof(struct _Dwarf_Attribute))) == NULL) { 77 DWARF_SET_ERROR(error, DWARF_E_MEMORY); 78 return DWARF_E_MEMORY; 79 } 80 81 /* Initialise the attribute structure. */ 82 at->at_attrib = attr; 83 at->at_form = form; 84 85 /* Add the attribute to the list in the abbrev. */ 86 STAILQ_INSERT_TAIL(&a->a_attrib, at, at_next); 87 88 if (atp != NULL) 89 *atp = at; 90 91 return ret; 92} 93