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: stable/9/lib/libdwarf/dwarf_attr.c 179187 2008-05-22 02:14:23Z jb $
27 */
28
29 #include <stdlib.h>
30 #include <string.h>
31 #include "_libdwarf.h"
32
33 int
dwarf_attr(Dwarf_Die die,Dwarf_Half attr,Dwarf_Attribute * atp,Dwarf_Error * err)34 dwarf_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
62 int
dwarf_attr_add(Dwarf_Abbrev a,uint64_t attr,uint64_t form,Dwarf_Attribute * atp,Dwarf_Error * error)63 dwarf_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