1 /* $NetBSD: dwarf_attr.c,v 1.5 2024/03/03 17:37:30 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
5 * Copyright (c) 2009 Kai Wang
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include "_libdwarf.h"
31
32 __RCSID("$NetBSD: dwarf_attr.c,v 1.5 2024/03/03 17:37:30 christos Exp $");
33 ELFTC_VCSID("Id: dwarf_attr.c 3064 2014-06-06 19:35:55Z kaiwang27");
34
35 int
dwarf_attr(Dwarf_Die die,Dwarf_Half attr,Dwarf_Attribute * atp,Dwarf_Error * error)36 dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
37 Dwarf_Error *error)
38 {
39 Dwarf_Debug dbg;
40 Dwarf_Attribute at;
41
42 dbg = die != NULL ? die->die_dbg : NULL;
43
44 if (die == NULL || atp == NULL) {
45 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
46 return (DW_DLV_ERROR);
47 }
48
49 if ((at = _dwarf_attr_find(die, attr)) == NULL) {
50 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
51 return (DW_DLV_NO_ENTRY);
52 }
53
54 *atp = at;
55
56 return (DW_DLV_OK);
57 }
58
59 int
dwarf_attrlist(Dwarf_Die die,Dwarf_Attribute ** attrbuf,Dwarf_Signed * attrcount,Dwarf_Error * error)60 dwarf_attrlist(Dwarf_Die die, Dwarf_Attribute **attrbuf,
61 Dwarf_Signed *attrcount, Dwarf_Error *error)
62 {
63 Dwarf_Attribute at;
64 Dwarf_Debug dbg;
65 int i;
66
67 dbg = die != NULL ? die->die_dbg : NULL;
68
69 if (die == NULL || attrbuf == NULL || attrcount == NULL) {
70 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
71 return (DW_DLV_ERROR);
72 }
73
74 if (die->die_ab->ab_atnum == 0) {
75 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
76 return (DW_DLV_NO_ENTRY);
77 }
78
79 *attrcount = die->die_ab->ab_atnum;
80
81 if (die->die_attrarray != NULL) {
82 *attrbuf = die->die_attrarray;
83 return (DW_DLV_OK);
84 }
85
86 if ((die->die_attrarray = malloc(*attrcount * sizeof(Dwarf_Attribute)))
87 == NULL) {
88 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
89 return (DW_DLV_ERROR);
90 }
91
92 for (i = 0, at = STAILQ_FIRST(&die->die_attr);
93 i < *attrcount && at != NULL; i++, at = STAILQ_NEXT(at, at_next))
94 die->die_attrarray[i] = at;
95
96 *attrbuf = die->die_attrarray;
97
98 return (DW_DLV_OK);
99 }
100
101 int
dwarf_hasattr(Dwarf_Die die,Dwarf_Half attr,Dwarf_Bool * ret_bool,Dwarf_Error * error)102 dwarf_hasattr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool,
103 Dwarf_Error *error)
104 {
105 Dwarf_Debug dbg;
106
107 dbg = die != NULL ? die->die_dbg : NULL;
108
109 if (die == NULL || ret_bool == NULL) {
110 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
111 return (DW_DLV_ERROR);
112 }
113
114 *ret_bool = (_dwarf_attr_find(die, attr) != NULL);
115
116 return (DW_DLV_OK);
117 }
118
119 int
dwarf_attroffset(Dwarf_Attribute at,Dwarf_Off * ret_off,Dwarf_Error * error)120 dwarf_attroffset(Dwarf_Attribute at, Dwarf_Off *ret_off, Dwarf_Error *error)
121 {
122 Dwarf_Debug dbg;
123
124 dbg = at != NULL ? at->at_die->die_dbg : NULL;
125
126 if (at == NULL || ret_off == NULL) {
127 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
128 return (DW_DLV_ERROR);
129 }
130
131 *ret_off = at->at_offset;
132
133 return (DW_DLV_OK);
134 }
135
136 int
dwarf_lowpc(Dwarf_Die die,Dwarf_Addr * ret_lowpc,Dwarf_Error * error)137 dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *error)
138 {
139 Dwarf_Attribute at;
140 Dwarf_Debug dbg;
141
142 dbg = die != NULL ? die->die_dbg : NULL;
143
144 if (die == NULL || ret_lowpc == NULL) {
145 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
146 return (DW_DLV_ERROR);
147 }
148
149 if ((at = _dwarf_attr_find(die, DW_AT_low_pc)) == NULL) {
150 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
151 return (DW_DLV_NO_ENTRY);
152 }
153
154 *ret_lowpc = at->u[0].u64;
155
156 return (DW_DLV_OK);
157 }
158
159 int
dwarf_highpc(Dwarf_Die die,Dwarf_Addr * ret_highpc,Dwarf_Error * error)160 dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *error)
161 {
162
163 return (dwarf_highpc_b(die, ret_highpc, NULL, NULL, error));
164 }
165
166 int
dwarf_highpc_b(Dwarf_Die die,Dwarf_Addr * ret_highpc,Dwarf_Half * ret_form,enum Dwarf_Form_Class * ret_class,Dwarf_Error * error)167 dwarf_highpc_b(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Half *ret_form,
168 enum Dwarf_Form_Class *ret_class, Dwarf_Error *error)
169 {
170 Dwarf_Attribute at;
171 Dwarf_Debug dbg;
172 Dwarf_CU cu;
173
174 dbg = die != NULL ? die->die_dbg : NULL;
175
176 if (die == NULL || ret_highpc == NULL) {
177 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
178 return (DW_DLV_ERROR);
179 }
180
181 if ((at = _dwarf_attr_find(die, DW_AT_high_pc)) == NULL) {
182 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
183 return (DW_DLV_NO_ENTRY);
184 }
185
186 *ret_highpc = at->u[0].u64;
187
188 if (ret_form != NULL) {
189 *ret_form = at->at_form;
190 }
191
192 if (ret_class != NULL) {
193 cu = die->die_cu;
194 *ret_class = dwarf_get_form_class(cu->cu_version,
195 DW_AT_high_pc, cu->cu_length_size == 4 ? 4 : 8,
196 at->at_form);
197 }
198
199 return (DW_DLV_OK);
200 }
201
202 int
dwarf_bytesize(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)203 dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
204 {
205 Dwarf_Attribute at;
206 Dwarf_Debug dbg;
207
208 dbg = die != NULL ? die->die_dbg : NULL;
209
210 if (die == NULL || ret_size == NULL) {
211 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
212 return (DW_DLV_ERROR);
213 }
214
215 if ((at = _dwarf_attr_find(die, DW_AT_byte_size)) == NULL) {
216 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
217 return (DW_DLV_NO_ENTRY);
218 }
219
220 *ret_size = at->u[0].u64;
221
222 return (DW_DLV_OK);
223 }
224
225 int
dwarf_bitsize(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)226 dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
227 {
228 Dwarf_Attribute at;
229 Dwarf_Debug dbg;
230
231 dbg = die != NULL ? die->die_dbg : NULL;
232
233 if (die == NULL || ret_size == NULL) {
234 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
235 return (DW_DLV_ERROR);
236 }
237
238 if ((at = _dwarf_attr_find(die, DW_AT_bit_size)) == NULL) {
239 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
240 return (DW_DLV_NO_ENTRY);
241 }
242
243 *ret_size = at->u[0].u64;
244
245 return (DW_DLV_OK);
246 }
247
248 int
dwarf_bitoffset(Dwarf_Die die,Dwarf_Unsigned * ret_size,Dwarf_Error * error)249 dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
250 {
251 Dwarf_Attribute at;
252 Dwarf_Debug dbg;
253
254 dbg = die != NULL ? die->die_dbg : NULL;
255
256 if (die == NULL || ret_size == NULL) {
257 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
258 return (DW_DLV_ERROR);
259 }
260
261 if ((at = _dwarf_attr_find(die, DW_AT_bit_offset)) == NULL) {
262 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
263 return (DW_DLV_NO_ENTRY);
264 }
265
266 *ret_size = at->u[0].u64;
267
268 return (DW_DLV_OK);
269 }
270
271 int
dwarf_srclang(Dwarf_Die die,Dwarf_Unsigned * ret_lang,Dwarf_Error * error)272 dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *error)
273 {
274 Dwarf_Attribute at;
275 Dwarf_Debug dbg;
276
277 dbg = die != NULL ? die->die_dbg : NULL;
278
279 if (die == NULL || ret_lang == NULL) {
280 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
281 return (DW_DLV_ERROR);
282 }
283
284 if ((at = _dwarf_attr_find(die, DW_AT_language)) == NULL) {
285 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
286 return (DW_DLV_NO_ENTRY);
287 }
288
289 *ret_lang = at->u[0].u64;
290
291 return (DW_DLV_OK);
292 }
293
294 int
dwarf_arrayorder(Dwarf_Die die,Dwarf_Unsigned * ret_order,Dwarf_Error * error)295 dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *error)
296 {
297 Dwarf_Attribute at;
298 Dwarf_Debug dbg;
299
300 dbg = die != NULL ? die->die_dbg : NULL;
301
302 if (die == NULL || ret_order == NULL) {
303 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
304 return (DW_DLV_ERROR);
305 }
306
307 if ((at = _dwarf_attr_find(die, DW_AT_ordering)) == NULL) {
308 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
309 return (DW_DLV_NO_ENTRY);
310 }
311
312 *ret_order = at->u[0].u64;
313
314 return (DW_DLV_OK);
315 }
316