2 * Copyright (c) 2006,2008 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>
36 ELFTC_VCSID("$Id: gelf_dyn.c 2998 2014-03-18 17:19:00Z jkoshy $");
39 gelf_getdyn(Elf_Data *ed, int ndx, GElf_Dyn *dst)
48 struct _Libelf_Data *d;
50 d = (struct _Libelf_Data *) ed;
52 if (d == NULL || ndx < 0 || dst == NULL ||
53 (scn = d->d_scn) == NULL ||
54 (e = scn->s_elf) == NULL) {
55 LIBELF_SET_ERROR(ARGUMENT, 0);
60 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
63 sh_type = scn->s_shdr.s_shdr32.sh_type;
65 sh_type = scn->s_shdr.s_shdr64.sh_type;
67 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
68 LIBELF_SET_ERROR(ARGUMENT, 0);
72 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
77 if (msz * (size_t) ndx >= d->d_data.d_size) {
78 LIBELF_SET_ERROR(ARGUMENT, 0);
82 if (ec == ELFCLASS32) {
83 dyn32 = (Elf32_Dyn *) d->d_data.d_buf + ndx;
85 dst->d_tag = dyn32->d_tag;
86 dst->d_un.d_val = (Elf64_Xword) dyn32->d_un.d_val;
90 dyn64 = (Elf64_Dyn *) d->d_data.d_buf + ndx;
99 gelf_update_dyn(Elf_Data *ed, int ndx, GElf_Dyn *ds)
108 struct _Libelf_Data *d;
110 d = (struct _Libelf_Data *) ed;
112 if (d == NULL || ndx < 0 || ds == NULL ||
113 (scn = d->d_scn) == NULL ||
114 (e = scn->s_elf) == NULL) {
115 LIBELF_SET_ERROR(ARGUMENT, 0);
120 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
122 if (ec == ELFCLASS32)
123 sh_type = scn->s_shdr.s_shdr32.sh_type;
125 sh_type = scn->s_shdr.s_shdr64.sh_type;
127 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
128 LIBELF_SET_ERROR(ARGUMENT, 0);
132 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
137 if (msz * (size_t) ndx >= d->d_data.d_size) {
138 LIBELF_SET_ERROR(ARGUMENT, 0);
142 if (ec == ELFCLASS32) {
143 dyn32 = (Elf32_Dyn *) d->d_data.d_buf + ndx;
145 LIBELF_COPY_S32(dyn32, ds, d_tag);
146 LIBELF_COPY_U32(dyn32, ds, d_un.d_val);
148 dyn64 = (Elf64_Dyn *) d->d_data.d_buf + ndx;