1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
* verdef.h - copy versioning information.
* Copyright (C) 2001 - 2006 Michael Riepe
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef lint
static const char verdef_h_rcsid[] = "@(#) $Id: verdef.h,v 1.13 2008/05/23 08:15:35 michael Exp $";
#endif /* lint */
#if VER_DEF_CURRENT != 1
#error libelf currently does not support VER_DEF_CURRENT != 1
#endif /* VER_DEF_CURRENT != 1 */
#if TOFILE
static void
__store_verdaux(verdaux_ftype *dst, const verdaux_mtype *src, unsigned enc) {
if (enc == ELFDATA2LSB) {
__store_u32L(dst->vda_name, src->vda_name);
__store_u32L(dst->vda_next, src->vda_next);
}
else {
__store_u32M(dst->vda_name, src->vda_name);
__store_u32M(dst->vda_next, src->vda_next);
}
}
static void
__store_verdef(verdef_ftype *dst, const verdef_mtype *src, unsigned enc) {
if (enc == ELFDATA2LSB) {
__store_u16L(dst->vd_version, src->vd_version);
__store_u16L(dst->vd_flags, src->vd_flags);
__store_u16L(dst->vd_ndx, src->vd_ndx);
__store_u16L(dst->vd_cnt, src->vd_cnt);
__store_u32L(dst->vd_hash, src->vd_hash);
__store_u32L(dst->vd_aux, src->vd_aux);
__store_u32L(dst->vd_next, src->vd_next);
}
else {
__store_u16M(dst->vd_version, src->vd_version);
__store_u16M(dst->vd_flags, src->vd_flags);
__store_u16M(dst->vd_ndx, src->vd_ndx);
__store_u16M(dst->vd_cnt, src->vd_cnt);
__store_u32M(dst->vd_hash, src->vd_hash);
__store_u32M(dst->vd_aux, src->vd_aux);
__store_u32M(dst->vd_next, src->vd_next);
}
}
typedef verdaux_mtype verdaux_stype;
typedef verdaux_ftype verdaux_dtype;
typedef verdef_mtype verdef_stype;
typedef verdef_ftype verdef_dtype;
typedef align_mtype verdef_atype;
#define copy_verdaux_srctotmp(d, s, e) (*(d) = *(s))
#define copy_verdaux_tmptodst(d, s, e) __store_verdaux((d), (s), (e))
#define copy_verdef_srctotmp(d, s, e) (*(d) = *(s))
#define copy_verdef_tmptodst(d, s, e) __store_verdef((d), (s), (e))
#define translator_suffix _tof
#else /* TOFILE */
static void
__load_verdaux(verdaux_mtype *dst, const verdaux_ftype *src, unsigned enc) {
if (enc == ELFDATA2LSB) {
dst->vda_name = __load_u32L(src->vda_name);
dst->vda_next = __load_u32L(src->vda_next);
}
else {
dst->vda_name = __load_u32M(src->vda_name);
dst->vda_next = __load_u32M(src->vda_next);
}
}
static void
__load_verdef(verdef_mtype *dst, const verdef_ftype *src, unsigned enc) {
if (enc == ELFDATA2LSB) {
dst->vd_version = __load_u16L(src->vd_version);
dst->vd_flags = __load_u16L(src->vd_flags);
dst->vd_ndx = __load_u16L(src->vd_ndx);
dst->vd_cnt = __load_u16L(src->vd_cnt);
dst->vd_hash = __load_u32L(src->vd_hash);
dst->vd_aux = __load_u32L(src->vd_aux);
dst->vd_next = __load_u32L(src->vd_next);
}
else {
dst->vd_version = __load_u16M(src->vd_version);
dst->vd_flags = __load_u16M(src->vd_flags);
dst->vd_ndx = __load_u16M(src->vd_ndx);
dst->vd_cnt = __load_u16M(src->vd_cnt);
dst->vd_hash = __load_u32M(src->vd_hash);
dst->vd_aux = __load_u32M(src->vd_aux);
dst->vd_next = __load_u32M(src->vd_next);
}
}
typedef verdaux_ftype verdaux_stype;
typedef verdaux_mtype verdaux_dtype;
typedef verdef_ftype verdef_stype;
typedef verdef_mtype verdef_dtype;
typedef align_ftype verdef_atype;
#define copy_verdaux_srctotmp(d, s, e) __load_verdaux((d), (s), (e))
#define copy_verdaux_tmptodst(d, s, e) (*(d) = *(s))
#define copy_verdef_srctotmp(d, s, e) __load_verdef((d), (s), (e))
#define copy_verdef_tmptodst(d, s, e) (*(d) = *(s))
#define translator_suffix _tom
#endif /* TOFILE */
#define cat3(a,b,c) a##b##c
#define xlt3(p,e,s) cat3(p,e,s)
#define xltprefix(x) xlt3(x,_,class_suffix)
#define translator(x,e) xlt3(xltprefix(_elf_##x),e,translator_suffix)
static size_t
xlt_verdef(unsigned char *dst, const unsigned char *src, size_t n, unsigned enc) {
size_t off;
if (sizeof(verdef_stype) != sizeof(verdef_dtype)
|| sizeof(verdaux_stype) != sizeof(verdaux_dtype)) {
/* never happens for ELF v1 and Verneed v1 */
seterr(ERROR_UNIMPLEMENTED);
return (size_t)-1;
}
/* size translation shortcut */
if (dst == NULL) {
return n;
}
if (src == NULL) {
seterr(ERROR_NULLBUF);
return (size_t)-1;
}
off = 0;
while (off + sizeof(verdef_stype) <= n) {
const verdef_stype *svd;
verdef_dtype *dvd;
verdef_mtype vd;
size_t acount;
size_t aoff;
/*
* check for proper alignment
*/
if (off % sizeof(verdef_atype)) {
seterr(ERROR_VERDEF_FORMAT);
return (size_t)-1;
}
/*
* copy and check src
*/
svd = (verdef_stype*)(src + off);
dvd = (verdef_dtype*)(dst + off);
copy_verdef_srctotmp(&vd, svd, enc);
if (vd.vd_version < 1
|| vd.vd_version > VER_DEF_CURRENT) {
seterr(ERROR_VERDEF_VERSION);
return (size_t)-1;
}
if (vd.vd_cnt < 1
|| vd.vd_aux == 0) {
seterr(ERROR_VERDEF_FORMAT);
return (size_t)-1;
}
copy_verdef_tmptodst(dvd, &vd, enc);
/*
* copy aux array
*/
aoff = off + vd.vd_aux;
for (acount = 0; acount < vd.vd_cnt; acount++) {
const verdaux_stype *svda;
verdaux_dtype *dvda;
verdaux_mtype vda;
/*
* are we still inside the buffer limits?
*/
if (aoff + sizeof(verdaux_stype) > n) {
break;
}
/*
* check for proper alignment
*/
if (aoff % sizeof(verdef_atype)) {
seterr(ERROR_VERDEF_FORMAT);
return (size_t)-1;
}
/*
* copy and check src
*/
svda = (verdaux_stype*)(src + aoff);
dvda = (verdaux_dtype*)(dst + aoff);
copy_verdaux_srctotmp(&vda, svda, enc);
copy_verdaux_tmptodst(dvda, &vda, enc);
/*
* advance to next verdaux
*/
if (vda.vda_next == 0) {
/* end of list */
break;
}
aoff += vda.vda_next;
}
/*
* advance to next verdef
*/
if (vd.vd_next == 0) {
/* end of list */
break;
}
off += vd.vd_next;
}
return n;
}
size_t
translator(verdef,L11)(unsigned char *dst, const unsigned char *src, size_t n) {
return xlt_verdef(dst, src, n, ELFDATA2LSB);
}
size_t
translator(verdef,M11)(unsigned char *dst, const unsigned char *src, size_t n) {
return xlt_verdef(dst, src, n, ELFDATA2MSB);
}
|
