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_rela.c 2998 2014-03-18 17:19:00Z jkoshy $");
39 gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *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_RELA) {
68 LIBELF_SET_ERROR(ARGUMENT, 0);
72 msz = _libelf_msize(ELF_T_RELA, 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 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
85 dst->r_offset = (Elf64_Addr) rela32->r_offset;
86 dst->r_info = ELF64_R_INFO(
87 (Elf64_Xword) ELF32_R_SYM(rela32->r_info),
88 ELF32_R_TYPE(rela32->r_info));
89 dst->r_addend = (Elf64_Sxword) rela32->r_addend;
93 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
102 gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr)
111 struct _Libelf_Data *d;
113 d = (struct _Libelf_Data *) ed;
115 if (d == NULL || ndx < 0 || dr == NULL ||
116 (scn = d->d_scn) == NULL ||
117 (e = scn->s_elf) == NULL) {
118 LIBELF_SET_ERROR(ARGUMENT, 0);
123 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
125 if (ec == ELFCLASS32)
126 sh_type = scn->s_shdr.s_shdr32.sh_type;
128 sh_type = scn->s_shdr.s_shdr64.sh_type;
130 if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
131 LIBELF_SET_ERROR(ARGUMENT, 0);
135 msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
140 if (msz * (size_t) ndx >= d->d_data.d_size) {
141 LIBELF_SET_ERROR(ARGUMENT, 0);
145 if (ec == ELFCLASS32) {
146 rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
148 LIBELF_COPY_U32(rela32, dr, r_offset);
150 if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
151 ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
152 LIBELF_SET_ERROR(RANGE, 0);
155 rela32->r_info = ELF32_R_INFO(
156 (Elf32_Word) ELF64_R_SYM(dr->r_info),
157 (Elf32_Word) ELF64_R_TYPE(dr->r_info));
159 LIBELF_COPY_S32(rela32, dr, r_addend);
161 rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;