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_sym.c 2272 2011-12-03 17:07:31Z jkoshy $");
38 gelf_getsym(Elf_Data *ed, int ndx, GElf_Sym *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_SYM) {
67 LIBELF_SET_ERROR(ARGUMENT, 0);
71 msz = _libelf_msize(ELF_T_SYM, ec, e->e_version);
75 if (msz * ndx >= d->d_data.d_size) {
76 LIBELF_SET_ERROR(ARGUMENT, 0);
80 if (ec == ELFCLASS32) {
82 sym32 = (Elf32_Sym *) d->d_data.d_buf + ndx;
84 dst->st_name = sym32->st_name;
85 dst->st_value = (Elf64_Addr) sym32->st_value;
86 dst->st_size = (Elf64_Xword) sym32->st_size;
87 dst->st_info = ELF64_ST_INFO(ELF32_ST_BIND(sym32->st_info),
88 ELF32_ST_TYPE(sym32->st_info));
89 dst->st_other = sym32->st_other;
90 dst->st_shndx = sym32->st_shndx;
93 sym64 = (Elf64_Sym *) d->d_data.d_buf + ndx;
102 gelf_update_sym(Elf_Data *ed, int ndx, GElf_Sym *gs)
111 struct _Libelf_Data *d;
113 d = (struct _Libelf_Data *) ed;
115 if (d == NULL || ndx < 0 || gs == 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_SYM) {
131 LIBELF_SET_ERROR(ARGUMENT, 0);
135 msz = _libelf_msize(ELF_T_SYM, ec, e->e_version);
138 if (msz * ndx >= d->d_data.d_size) {
139 LIBELF_SET_ERROR(ARGUMENT, 0);
143 if (ec == ELFCLASS32) {
144 sym32 = (Elf32_Sym *) d->d_data.d_buf + ndx;
146 sym32->st_name = gs->st_name;
147 sym32->st_info = gs->st_info;
148 sym32->st_other = gs->st_other;
149 sym32->st_shndx = gs->st_shndx;
151 LIBELF_COPY_U32(sym32, gs, st_value);
152 LIBELF_COPY_U32(sym32, gs, st_size);
154 sym64 = (Elf64_Sym *) d->d_data.d_buf + ndx;