126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*
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* gelfshdr.c - gelf_* translation functions.
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* Copyright (C) 2000 - 2006 Michael Riepe
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <private.h>
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#if __LIBELF64
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#ifndef lint
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static const char rcsid[] = "@(#) $Id: gelfshdr.c,v 1.10 2008/05/23 08:15:34 michael Exp $";
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#endif /* lint */
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#define check_and_copy(type, d, s, name, eret) \
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do { \
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if (sizeof((d)->name) < sizeof((s)->name) \
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&& (type)(s)->name != (s)->name) { \
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seterr(ERROR_BADVALUE); \
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return (eret); \
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} \
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(d)->name = (type)(s)->name; \
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} while (0)
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GElf_Shdr*
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gelf_getshdr(Elf_Scn *scn, GElf_Shdr *dst) {
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GElf_Shdr buf;
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if (!scn) {
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return NULL;
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}
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elf_assert(scn->s_magic == SCN_MAGIC);
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elf_assert(scn->s_elf);
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elf_assert(scn->s_elf->e_magic == ELF_MAGIC);
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if (!dst) {
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dst = &buf;
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}
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if (scn->s_elf->e_class == ELFCLASS64) {
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*dst = scn->s_shdr64;
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}
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else if (scn->s_elf->e_class == ELFCLASS32) {
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Elf32_Shdr *src = &scn->s_shdr32;
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check_and_copy(GElf_Word, dst, src, sh_name, NULL);
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check_and_copy(GElf_Word, dst, src, sh_type, NULL);
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check_and_copy(GElf_Xword, dst, src, sh_flags, NULL);
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check_and_copy(GElf_Addr, dst, src, sh_addr, NULL);
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check_and_copy(GElf_Off, dst, src, sh_offset, NULL);
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check_and_copy(GElf_Xword, dst, src, sh_size, NULL);
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check_and_copy(GElf_Word, dst, src, sh_link, NULL);
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check_and_copy(GElf_Word, dst, src, sh_info, NULL);
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check_and_copy(GElf_Xword, dst, src, sh_addralign, NULL);
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check_and_copy(GElf_Xword, dst, src, sh_entsize, NULL);
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}
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else {
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if (valid_class(scn->s_elf->e_class)) {
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seterr(ERROR_UNIMPLEMENTED);
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}
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else {
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seterr(ERROR_UNKNOWN_CLASS);
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}
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return NULL;
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}
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if (dst == &buf) {
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dst = (GElf_Shdr*)malloc(sizeof(GElf_Shdr));
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if (!dst) {
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seterr(ERROR_MEM_SHDR);
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return NULL;
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}
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*dst = buf;
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}
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return dst;
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}
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int
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gelf_update_shdr(Elf_Scn *scn, GElf_Shdr *src) {
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if (!scn || !src) {
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return 0;
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}
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elf_assert(scn->s_magic == SCN_MAGIC);
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elf_assert(scn->s_elf);
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elf_assert(scn->s_elf->e_magic == ELF_MAGIC);
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if (scn->s_elf->e_class == ELFCLASS64) {
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scn->s_shdr64 = *src;
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}
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else if (scn->s_elf->e_class == ELFCLASS32) {
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Elf32_Shdr *dst = &scn->s_shdr32;
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check_and_copy(Elf32_Word, dst, src, sh_name, 0);
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check_and_copy(Elf32_Word, dst, src, sh_type, 0);
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check_and_copy(Elf32_Word, dst, src, sh_flags, 0);
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check_and_copy(Elf32_Addr, dst, src, sh_addr, 0);
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check_and_copy(Elf32_Off, dst, src, sh_offset, 0);
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check_and_copy(Elf32_Word, dst, src, sh_size, 0);
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check_and_copy(Elf32_Word, dst, src, sh_link, 0);
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check_and_copy(Elf32_Word, dst, src, sh_info, 0);
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check_and_copy(Elf32_Word, dst, src, sh_addralign, 0);
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check_and_copy(Elf32_Word, dst, src, sh_entsize, 0);
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}
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else {
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if (valid_class(scn->s_elf->e_class)) {
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seterr(ERROR_UNIMPLEMENTED);
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}
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else {
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seterr(ERROR_UNKNOWN_CLASS);
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}
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return 0;
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}
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return 1;
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}
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#endif /* __LIBELF64 */
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