dwarf_attr.c revision 260684 
1/*-
2 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
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
30ELFTC_VCSID("$Id: dwarf_attr.c 2072 2011-10-27 03:26:49Z jkoshy $");
31
32int
33dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
34    Dwarf_Error *error)
35{
36	Dwarf_Debug dbg;
37	Dwarf_Attribute at;
38
39	dbg = die != NULL ? die->die_dbg : NULL;
40
41	if (die == NULL || atp == NULL) {
42		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
43		return (DW_DLV_ERROR);
44	}
45
46	if ((at = _dwarf_attr_find(die, attr)) == NULL) {
47		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
48		return (DW_DLV_NO_ENTRY);
49	}
50
51	*atp = at;
52
53	return (DW_DLV_OK);
54}
55
56int
57dwarf_attrlist(Dwarf_Die die, Dwarf_Attribute **attrbuf,
58    Dwarf_Signed *attrcount, Dwarf_Error *error)
59{
60	Dwarf_Attribute at;
61	Dwarf_Debug dbg;
62	int i;
63
64	dbg = die != NULL ? die->die_dbg : NULL;
65
66	if (die == NULL || attrbuf == NULL || attrcount == NULL) {
67		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
68		return (DW_DLV_ERROR);
69	}
70
71	if (die->die_ab->ab_atnum == 0) {
72		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
73		return (DW_DLV_NO_ENTRY);
74	}
75
76	*attrcount = die->die_ab->ab_atnum;
77
78	if (die->die_attrarray != NULL) {
79		*attrbuf = die->die_attrarray;
80		return (DW_DLV_OK);
81	}
82
83	if ((die->die_attrarray = malloc(*attrcount * sizeof(Dwarf_Attribute)))
84	    == NULL) {
85		DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
86		return (DW_DLV_ERROR);
87	}
88
89	for (i = 0, at = STAILQ_FIRST(&die->die_attr);
90	     i < *attrcount && at != NULL; i++, at = STAILQ_NEXT(at, at_next))
91		die->die_attrarray[i] = at;
92
93	*attrbuf = die->die_attrarray;
94
95	return (DW_DLV_OK);
96}
97
98int
99dwarf_hasattr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool,
100    Dwarf_Error *error)
101{
102	Dwarf_Debug dbg;
103
104	dbg = die != NULL ? die->die_dbg : NULL;
105
106	if (die == NULL || ret_bool == NULL) {
107		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
108		return (DW_DLV_ERROR);
109	}
110
111	*ret_bool = (_dwarf_attr_find(die, attr) != NULL);
112
113	return (DW_DLV_OK);
114}
115
116int
117dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *error)
118{
119	Dwarf_Attribute at;
120	Dwarf_Debug dbg;
121
122	dbg = die != NULL ? die->die_dbg : NULL;
123
124	if (die == NULL || ret_lowpc == NULL) {
125		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
126		return (DW_DLV_ERROR);
127	}
128
129	if ((at = _dwarf_attr_find(die, DW_AT_low_pc)) == NULL) {
130		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
131		return (DW_DLV_NO_ENTRY);
132	}
133
134	*ret_lowpc = at->u[0].u64;
135
136	return (DW_DLV_OK);
137}
138
139int
140dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *error)
141{
142	Dwarf_Attribute at;
143	Dwarf_Debug dbg;
144
145	dbg = die != NULL ? die->die_dbg : NULL;
146
147	if (die == NULL || ret_highpc == NULL) {
148		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
149		return (DW_DLV_ERROR);
150	}
151
152	if ((at = _dwarf_attr_find(die, DW_AT_high_pc)) == NULL) {
153		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
154		return (DW_DLV_NO_ENTRY);
155	}
156
157	*ret_highpc = at->u[0].u64;
158
159	return (DW_DLV_OK);
160}
161
162int
163dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
164{
165	Dwarf_Attribute at;
166	Dwarf_Debug dbg;
167
168	dbg = die != NULL ? die->die_dbg : NULL;
169
170	if (die == NULL || ret_size == NULL) {
171		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
172		return (DW_DLV_ERROR);
173	}
174
175	if ((at = _dwarf_attr_find(die, DW_AT_byte_size)) == NULL) {
176		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
177		return (DW_DLV_NO_ENTRY);
178	}
179
180	*ret_size = at->u[0].u64;
181
182	return (DW_DLV_OK);
183}
184
185int
186dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
187{
188	Dwarf_Attribute at;
189	Dwarf_Debug dbg;
190
191	dbg = die != NULL ? die->die_dbg : NULL;
192
193	if (die == NULL || ret_size == NULL) {
194		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
195		return (DW_DLV_ERROR);
196	}
197
198	if ((at = _dwarf_attr_find(die, DW_AT_bit_size)) == NULL) {
199		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
200		return (DW_DLV_NO_ENTRY);
201	}
202
203	*ret_size = at->u[0].u64;
204
205	return (DW_DLV_OK);
206}
207
208int
209dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
210{
211	Dwarf_Attribute at;
212	Dwarf_Debug dbg;
213
214	dbg = die != NULL ? die->die_dbg : NULL;
215
216	if (die == NULL || ret_size == NULL) {
217		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
218		return (DW_DLV_ERROR);
219	}
220
221	if ((at = _dwarf_attr_find(die, DW_AT_bit_offset)) == NULL) {
222		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
223		return (DW_DLV_NO_ENTRY);
224	}
225
226	*ret_size = at->u[0].u64;
227
228	return (DW_DLV_OK);
229}
230
231int
232dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *error)
233{
234	Dwarf_Attribute at;
235	Dwarf_Debug dbg;
236
237	dbg = die != NULL ? die->die_dbg : NULL;
238
239	if (die == NULL || ret_lang == NULL) {
240		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
241		return (DW_DLV_ERROR);
242	}
243
244	if ((at = _dwarf_attr_find(die, DW_AT_language)) == NULL) {
245		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
246		return (DW_DLV_NO_ENTRY);
247	}
248
249	*ret_lang = at->u[0].u64;
250
251	return (DW_DLV_OK);
252}
253
254int
255dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *error)
256{
257	Dwarf_Attribute at;
258	Dwarf_Debug dbg;
259
260	dbg = die != NULL ? die->die_dbg : NULL;
261
262	if (die == NULL || ret_order == NULL) {
263		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
264		return (DW_DLV_ERROR);
265	}
266
267	if ((at = _dwarf_attr_find(die, DW_AT_ordering)) == NULL) {
268		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
269		return (DW_DLV_NO_ENTRY);
270	}
271
272	*ret_order = at->u[0].u64;
273
274	return (DW_DLV_OK);
275}
276