1 /*-
2 * Copyright (c) 2006 Joseph Koshy
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 <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/limits.h>
31
32 #include <assert.h>
33 #include <gelf.h>
34 #include <osreldate.h>
35
36 #include "_libelf.h"
37
38 #if __FreeBSD_version >= 700025
39
40 GElf_Move *
gelf_getmove(Elf_Data * d,int ndx,GElf_Move * dst)41 gelf_getmove(Elf_Data *d, int ndx, GElf_Move *dst)
42 {
43 int ec;
44 Elf *e;
45 Elf_Scn *scn;
46 Elf32_Move *move32;
47 Elf64_Move *move64;
48 size_t msz;
49 uint32_t sh_type;
50
51 if (d == NULL || ndx < 0 || dst == NULL ||
52 (scn = d->d_scn) == NULL ||
53 (e = scn->s_elf) == NULL) {
54 LIBELF_SET_ERROR(ARGUMENT, 0);
55 return (NULL);
56 }
57
58 ec = e->e_class;
59 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
60
61 if (ec == ELFCLASS32)
62 sh_type = scn->s_shdr.s_shdr32.sh_type;
63 else
64 sh_type = scn->s_shdr.s_shdr64.sh_type;
65
66 if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) {
67 LIBELF_SET_ERROR(ARGUMENT, 0);
68 return (NULL);
69 }
70
71 msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version);
72
73 assert(msz > 0);
74
75 if (msz * ndx >= d->d_size) {
76 LIBELF_SET_ERROR(ARGUMENT, 0);
77 return (NULL);
78 }
79
80 if (ec == ELFCLASS32) {
81
82 move32 = (Elf32_Move *) d->d_buf + ndx;
83
84 dst->m_value = move32->m_value;
85 dst->m_info = (Elf64_Xword) move32->m_info;
86 dst->m_poffset = (Elf64_Xword) move32->m_poffset;
87 dst->m_repeat = move32->m_repeat;
88 dst->m_stride = move32->m_stride;
89 } else {
90
91 move64 = (Elf64_Move *) d->d_buf + ndx;
92
93 *dst = *move64;
94 }
95
96 return (dst);
97 }
98
99 int
gelf_update_move(Elf_Data * d,int ndx,GElf_Move * gm)100 gelf_update_move(Elf_Data *d, int ndx, GElf_Move *gm)
101 {
102 int ec;
103 Elf *e;
104 Elf_Scn *scn;
105 Elf32_Move *move32;
106 Elf64_Move *move64;
107 size_t msz;
108 uint32_t sh_type;
109
110 if (d == NULL || ndx < 0 || gm == NULL ||
111 (scn = d->d_scn) == NULL ||
112 (e = scn->s_elf) == NULL) {
113 LIBELF_SET_ERROR(ARGUMENT, 0);
114 return (0);
115 }
116
117 ec = e->e_class;
118 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
119
120 if (ec == ELFCLASS32)
121 sh_type = scn->s_shdr.s_shdr32.sh_type;
122 else
123 sh_type = scn->s_shdr.s_shdr64.sh_type;
124
125 if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) {
126 LIBELF_SET_ERROR(ARGUMENT, 0);
127 return (0);
128 }
129
130 msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version);
131 assert(msz > 0);
132
133 if (msz * ndx >= d->d_size) {
134 LIBELF_SET_ERROR(ARGUMENT, 0);
135 return (0);
136 }
137
138 if (ec == ELFCLASS32) {
139 move32 = (Elf32_Move *) d->d_buf + ndx;
140
141 move32->m_value = gm->m_value;
142 LIBELF_COPY_U32(move32, gm, m_info);
143 LIBELF_COPY_U32(move32, gm, m_poffset);
144 move32->m_repeat = gm->m_repeat;
145 move32->m_stride = gm->m_stride;
146
147 } else {
148 move64 = (Elf64_Move *) d->d_buf + ndx;
149
150 *move64 = *gm;
151 }
152
153 return (1);
154 }
155
156 #endif /* __FreeBSD_version >= 700025 */
157