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>
35 ELFTC_VCSID("$Id: gelf_rela.c 2998 2014-03-18 17:19:00Z jkoshy $");
38 gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst)
47 struct _Libelf_Data *d;
49 d = (struct _Libelf_Data *) ed;
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);
59 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
62 sh_type = scn->s_shdr.s_shdr32.sh_type;
64 sh_type = scn->s_shdr.s_shdr64.sh_type;
66 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
67 LIBELF_SET_ERROR(ARGUMENT, 0);
71 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
76 if (msz * (size_t) ndx >= d->d_data.d_size) {
77 LIBELF_SET_ERROR(ARGUMENT, 0);
81 if (ec == ELFCLASS32) {
82 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
84 dst->r_offset = (Elf64_Addr) rela32->r_offset;
85 dst->r_info = ELF64_R_INFO(
86 (Elf64_Xword) ELF32_R_SYM(rela32->r_info),
87 ELF32_R_TYPE(rela32->r_info));
88 dst->r_addend = (Elf64_Sxword) rela32->r_addend;
92 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
101 gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr)
110 struct _Libelf_Data *d;
112 d = (struct _Libelf_Data *) ed;
114 if (d == NULL || ndx < 0 || dr == NULL ||
115 (scn = d->d_scn) == NULL ||
116 (e = scn->s_elf) == NULL) {
117 LIBELF_SET_ERROR(ARGUMENT, 0);
122 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
124 if (ec == ELFCLASS32)
125 sh_type = scn->s_shdr.s_shdr32.sh_type;
127 sh_type = scn->s_shdr.s_shdr64.sh_type;
129 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
130 LIBELF_SET_ERROR(ARGUMENT, 0);
134 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
139 if (msz * (size_t) ndx >= d->d_data.d_size) {
140 LIBELF_SET_ERROR(ARGUMENT, 0);
144 if (ec == ELFCLASS32) {
145 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
147 LIBELF_COPY_U32(rela32, dr, r_offset);
149 if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
150 ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
151 LIBELF_SET_ERROR(RANGE, 0);
154 rela32->r_info = ELF32_R_INFO(
155 (Elf32_Word) ELF64_R_SYM(dr->r_info),
156 (Elf32_Word) ELF64_R_TYPE(dr->r_info));
158 LIBELF_COPY_S32(rela32, dr, r_addend);
160 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;