1 /*-
2 * Copyright (c) 2009,2011 Kai Wang
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
27 #include "_libdwarf.h"
28
29 ELFTC_VCSID("$Id: dwarf_abbrev.c 2072 2011-10-27 03:26:49Z jkoshy $");
30
31 int
dwarf_get_abbrev(Dwarf_Debug dbg,Dwarf_Unsigned offset,Dwarf_Abbrev * return_abbrev,Dwarf_Unsigned * length,Dwarf_Unsigned * attr_count,Dwarf_Error * error)32 dwarf_get_abbrev(Dwarf_Debug dbg, Dwarf_Unsigned offset,
33 Dwarf_Abbrev *return_abbrev, Dwarf_Unsigned *length,
34 Dwarf_Unsigned *attr_count, Dwarf_Error *error)
35 {
36 Dwarf_Abbrev ab;
37 int ret;
38
39 if (dbg == NULL || return_abbrev == NULL || length == NULL ||
40 attr_count == NULL) {
41 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
42 return (DW_DLV_ERROR);
43 }
44
45 ret = _dwarf_abbrev_parse(dbg, NULL, &offset, &ab, error);
46 if (ret != DW_DLE_NONE) {
47 if (ret == DW_DLE_NO_ENTRY) {
48 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
49 return (DW_DLV_NO_ENTRY);
50 } else
51 return (DW_DLV_ERROR);
52 }
53
54 *return_abbrev = ab;
55 *length = ab->ab_length;
56 *attr_count = ab->ab_atnum;
57
58 return (DW_DLV_OK);
59 }
60
61 int
dwarf_get_abbrev_tag(Dwarf_Abbrev abbrev,Dwarf_Half * return_tag,Dwarf_Error * error)62 dwarf_get_abbrev_tag(Dwarf_Abbrev abbrev, Dwarf_Half *return_tag,
63 Dwarf_Error *error)
64 {
65
66 if (abbrev == NULL || return_tag == NULL) {
67 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
68 return (DW_DLV_ERROR);
69 }
70
71 *return_tag = (Dwarf_Half) abbrev->ab_tag;
72
73 return (DW_DLV_OK);
74 }
75
76 int
dwarf_get_abbrev_code(Dwarf_Abbrev abbrev,Dwarf_Unsigned * return_code,Dwarf_Error * error)77 dwarf_get_abbrev_code(Dwarf_Abbrev abbrev, Dwarf_Unsigned *return_code,
78 Dwarf_Error *error)
79 {
80
81 if (abbrev == NULL || return_code == NULL) {
82 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
83 return (DW_DLV_ERROR);
84 }
85
86 *return_code = abbrev->ab_entry;
87
88 return (DW_DLV_OK);
89 }
90
91 int
dwarf_get_abbrev_children_flag(Dwarf_Abbrev abbrev,Dwarf_Signed * return_flag,Dwarf_Error * error)92 dwarf_get_abbrev_children_flag(Dwarf_Abbrev abbrev, Dwarf_Signed *return_flag,
93 Dwarf_Error *error)
94 {
95
96 if (abbrev == NULL || return_flag == NULL) {
97 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
98 return (DW_DLV_ERROR);
99 }
100
101 *return_flag = (Dwarf_Signed) abbrev->ab_children;
102
103 return (DW_DLV_OK);
104 }
105
106 int
dwarf_get_abbrev_entry(Dwarf_Abbrev abbrev,Dwarf_Signed ndx,Dwarf_Half * attr_num,Dwarf_Signed * form,Dwarf_Off * offset,Dwarf_Error * error)107 dwarf_get_abbrev_entry(Dwarf_Abbrev abbrev, Dwarf_Signed ndx,
108 Dwarf_Half *attr_num, Dwarf_Signed *form, Dwarf_Off *offset,
109 Dwarf_Error *error)
110 {
111 Dwarf_AttrDef ad;
112 int i;
113
114 if (abbrev == NULL || attr_num == NULL || form == NULL ||
115 offset == NULL) {
116 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
117 return (DW_DLV_ERROR);
118 }
119
120 if (ndx < 0 || (uint64_t) ndx >= abbrev->ab_atnum) {
121 DWARF_SET_ERROR(NULL, error, DW_DLE_NO_ENTRY);
122 return (DW_DLV_NO_ENTRY);
123 }
124
125 ad = STAILQ_FIRST(&abbrev->ab_attrdef);
126 for (i = 0; i < ndx && ad != NULL; i++)
127 ad = STAILQ_NEXT(ad, ad_next);
128
129 assert(ad != NULL);
130
131 *attr_num = ad->ad_attrib;
132 *form = ad->ad_form;
133 *offset = ad->ad_offset;
134
135 return (DW_DLV_OK);
136 }
137