1/*-
2 * Copyright (c) 2006,2008 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 <assert.h>
28#include <gelf.h>
29#include <limits.h>
30#include <stdint.h>
31
32#include "_libelf.h"
33
34ELFTC_VCSID("$Id: gelf_rela.c 3177 2015-03-30 18:19:41Z emaste $");
35
36GElf_Rela *
37gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst)
38{
39 int ec;
40 Elf *e;
41 size_t msz;
42 Elf_Scn *scn;
43 uint32_t sh_type;
44 Elf32_Rela *rela32;
45 Elf64_Rela *rela64;
46 struct _Libelf_Data *d;
47
48 d = (struct _Libelf_Data *) ed;
49
50 if (d == NULL || ndx < 0 || dst == NULL ||
51 (scn = d->d_scn) == NULL ||
52 (e = scn->s_elf) == NULL) {
53 LIBELF_SET_ERROR(ARGUMENT, 0);
54 return (NULL);
55 }
56
57 ec = e->e_class;
58 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
59
60 if (ec == ELFCLASS32)
61 sh_type = scn->s_shdr.s_shdr32.sh_type;
62 else
63 sh_type = scn->s_shdr.s_shdr64.sh_type;
64
65 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
66 LIBELF_SET_ERROR(ARGUMENT, 0);
67 return (NULL);
68 }
69
70 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
71
72 assert(msz > 0);
73 assert(ndx >= 0);
74
75 if (msz * (size_t) ndx >= d->d_data.d_size) {
76 LIBELF_SET_ERROR(ARGUMENT, 0);
77 return (NULL);
78 }
79
80 if (ec == ELFCLASS32) {
81 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
82
83 dst->r_offset = (Elf64_Addr) rela32->r_offset;
84 dst->r_info = ELF64_R_INFO(
85 (Elf64_Xword) ELF32_R_SYM(rela32->r_info),
86 ELF32_R_TYPE(rela32->r_info));
87 dst->r_addend = (Elf64_Sxword) rela32->r_addend;
88
89 } else {
90
91 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
92
93 *dst = *rela64;
| 1/*-
2 * Copyright (c) 2006,2008 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 <assert.h>
28#include <gelf.h>
29#include <limits.h>
30#include <stdint.h>
31
32#include "_libelf.h"
33
34ELFTC_VCSID("$Id: gelf_rela.c 3177 2015-03-30 18:19:41Z emaste $");
35
36GElf_Rela *
37gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst)
38{
39 int ec;
40 Elf *e;
41 size_t msz;
42 Elf_Scn *scn;
43 uint32_t sh_type;
44 Elf32_Rela *rela32;
45 Elf64_Rela *rela64;
46 struct _Libelf_Data *d;
47
48 d = (struct _Libelf_Data *) ed;
49
50 if (d == NULL || ndx < 0 || dst == NULL ||
51 (scn = d->d_scn) == NULL ||
52 (e = scn->s_elf) == NULL) {
53 LIBELF_SET_ERROR(ARGUMENT, 0);
54 return (NULL);
55 }
56
57 ec = e->e_class;
58 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
59
60 if (ec == ELFCLASS32)
61 sh_type = scn->s_shdr.s_shdr32.sh_type;
62 else
63 sh_type = scn->s_shdr.s_shdr64.sh_type;
64
65 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
66 LIBELF_SET_ERROR(ARGUMENT, 0);
67 return (NULL);
68 }
69
70 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
71
72 assert(msz > 0);
73 assert(ndx >= 0);
74
75 if (msz * (size_t) ndx >= d->d_data.d_size) {
76 LIBELF_SET_ERROR(ARGUMENT, 0);
77 return (NULL);
78 }
79
80 if (ec == ELFCLASS32) {
81 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
82
83 dst->r_offset = (Elf64_Addr) rela32->r_offset;
84 dst->r_info = ELF64_R_INFO(
85 (Elf64_Xword) ELF32_R_SYM(rela32->r_info),
86 ELF32_R_TYPE(rela32->r_info));
87 dst->r_addend = (Elf64_Sxword) rela32->r_addend;
88
89 } else {
90
91 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
92
93 *dst = *rela64;
|
94 }
95
96 return (dst);
97}
98
99int
100gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr)
101{
102 int ec;
103 Elf *e;
104 size_t msz;
105 Elf_Scn *scn;
106 uint32_t sh_type;
107 Elf32_Rela *rela32;
108 Elf64_Rela *rela64;
109 struct _Libelf_Data *d;
110
111 d = (struct _Libelf_Data *) ed;
112
113 if (d == NULL || ndx < 0 || dr == NULL ||
114 (scn = d->d_scn) == NULL ||
115 (e = scn->s_elf) == NULL) {
116 LIBELF_SET_ERROR(ARGUMENT, 0);
117 return (0);
118 }
119
120 ec = e->e_class;
121 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
122
123 if (ec == ELFCLASS32)
124 sh_type = scn->s_shdr.s_shdr32.sh_type;
125 else
126 sh_type = scn->s_shdr.s_shdr64.sh_type;
127
128 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
129 LIBELF_SET_ERROR(ARGUMENT, 0);
130 return (0);
131 }
132
133 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
134
135 assert(msz > 0);
136 assert(ndx >= 0);
137
138 if (msz * (size_t) ndx >= d->d_data.d_size) {
139 LIBELF_SET_ERROR(ARGUMENT, 0);
140 return (0);
141 }
142
143 if (ec == ELFCLASS32) {
144 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
145
146 LIBELF_COPY_U32(rela32, dr, r_offset);
147
148 if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
149 ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
150 LIBELF_SET_ERROR(RANGE, 0);
151 return (0);
152 }
153 rela32->r_info = ELF32_R_INFO(
154 (Elf32_Word) ELF64_R_SYM(dr->r_info),
155 (Elf32_Word) ELF64_R_TYPE(dr->r_info));
156
157 LIBELF_COPY_S32(rela32, dr, r_addend);
158 } else {
159 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
160
161 *rela64 = *dr;
| 98 }
99
100 return (dst);
101}
102
103int
104gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr)
105{
106 int ec;
107 Elf *e;
108 size_t msz;
109 Elf_Scn *scn;
110 uint32_t sh_type;
111 Elf32_Rela *rela32;
112 Elf64_Rela *rela64;
113 struct _Libelf_Data *d;
114
115 d = (struct _Libelf_Data *) ed;
116
117 if (d == NULL || ndx < 0 || dr == NULL ||
118 (scn = d->d_scn) == NULL ||
119 (e = scn->s_elf) == NULL) {
120 LIBELF_SET_ERROR(ARGUMENT, 0);
121 return (0);
122 }
123
124 ec = e->e_class;
125 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
126
127 if (ec == ELFCLASS32)
128 sh_type = scn->s_shdr.s_shdr32.sh_type;
129 else
130 sh_type = scn->s_shdr.s_shdr64.sh_type;
131
132 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
133 LIBELF_SET_ERROR(ARGUMENT, 0);
134 return (0);
135 }
136
137 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
138
139 assert(msz > 0);
140 assert(ndx >= 0);
141
142 if (msz * (size_t) ndx >= d->d_data.d_size) {
143 LIBELF_SET_ERROR(ARGUMENT, 0);
144 return (0);
145 }
146
147 if (ec == ELFCLASS32) {
148 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
149
150 LIBELF_COPY_U32(rela32, dr, r_offset);
151
152 if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
153 ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
154 LIBELF_SET_ERROR(RANGE, 0);
155 return (0);
156 }
157 rela32->r_info = ELF32_R_INFO(
158 (Elf32_Word) ELF64_R_SYM(dr->r_info),
159 (Elf32_Word) ELF64_R_TYPE(dr->r_info));
160
161 LIBELF_COPY_S32(rela32, dr, r_addend);
162 } else {
163 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
164
165 *rela64 = *dr;
|