2 * Copyright (c) 2006 Joseph Koshy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/limits.h>
38 gelf_getdyn(Elf_Data *d, int ndx, GElf_Dyn *dst)
48 if (d == NULL || ndx < 0 || dst == NULL ||
49 (scn = d->d_scn) == NULL ||
50 (e = scn->s_elf) == NULL) {
51 LIBELF_SET_ERROR(ARGUMENT, 0);
56 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
59 sh_type = scn->s_shdr.s_shdr32.sh_type;
61 sh_type = scn->s_shdr.s_shdr64.sh_type;
63 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
64 LIBELF_SET_ERROR(ARGUMENT, 0);
68 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
72 if (msz * ndx >= d->d_size) {
73 LIBELF_SET_ERROR(ARGUMENT, 0);
77 if (ec == ELFCLASS32) {
78 dyn32 = (Elf32_Dyn *) d->d_buf + ndx;
80 dst->d_tag = dyn32->d_tag;
81 dst->d_un.d_val = (Elf64_Xword) dyn32->d_un.d_val;
85 dyn64 = (Elf64_Dyn *) d->d_buf + ndx;
94 gelf_update_dyn(Elf_Data *d, int ndx, GElf_Dyn *ds)
104 if (d == NULL || ndx < 0 || ds == NULL ||
105 (scn = d->d_scn) == NULL ||
106 (e = scn->s_elf) == NULL) {
107 LIBELF_SET_ERROR(ARGUMENT, 0);
112 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
114 if (ec == ELFCLASS32)
115 sh_type = scn->s_shdr.s_shdr32.sh_type;
117 sh_type = scn->s_shdr.s_shdr64.sh_type;
119 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
120 LIBELF_SET_ERROR(ARGUMENT, 0);
124 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
127 if (msz * ndx >= d->d_size) {
128 LIBELF_SET_ERROR(ARGUMENT, 0);
132 if (ec == ELFCLASS32) {
133 dyn32 = (Elf32_Dyn *) d->d_buf + ndx;
135 LIBELF_COPY_S32(dyn32, ds, d_tag);
136 LIBELF_COPY_U32(dyn32, ds, d_un.d_val);
138 dyn64 = (Elf64_Dyn *) d->d_buf + ndx;