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/*
* gelfphdr.c - gelf_* translation functions.
* Copyright (C) 2000 - 2006 Michael Riepe
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <private.h>
#if __LIBELF64
#ifndef lint
static const char rcsid[] = "@(#) $Id: gelfphdr.c,v 1.9 2008/05/23 08:15:34 michael Exp $";
#endif /* lint */
#define check_and_copy(type, d, s, name, eret) \
do { \
if (sizeof((d)->name) < sizeof((s)->name) \
&& (type)(s)->name != (s)->name) { \
seterr(ERROR_BADVALUE); \
return (eret); \
} \
(d)->name = (type)(s)->name; \
} while (0)
GElf_Phdr*
gelf_getphdr(Elf *elf, int ndx, GElf_Phdr *dst) {
GElf_Phdr buf;
char *tmp;
size_t n;
if (!elf) {
return NULL;
}
elf_assert(elf->e_magic == ELF_MAGIC);
tmp = _elf_getphdr(elf, elf->e_class);
if (!tmp) {
return NULL;
}
if (ndx < 0 || ndx >= elf->e_phnum) {
seterr(ERROR_BADINDEX);
return NULL;
}
n = _msize(elf->e_class, _elf_version, ELF_T_PHDR);
if (n == 0) {
seterr(ERROR_UNIMPLEMENTED);
return NULL;
}
if (!dst) {
dst = &buf;
}
if (elf->e_class == ELFCLASS64) {
*dst = *(Elf64_Phdr*)(tmp + ndx * n);
}
else if (elf->e_class == ELFCLASS32) {
Elf32_Phdr *src = (Elf32_Phdr*)(tmp + ndx * n);
check_and_copy(GElf_Word, dst, src, p_type, NULL);
check_and_copy(GElf_Word, dst, src, p_flags, NULL);
check_and_copy(GElf_Off, dst, src, p_offset, NULL);
check_and_copy(GElf_Addr, dst, src, p_vaddr, NULL);
check_and_copy(GElf_Addr, dst, src, p_paddr, NULL);
check_and_copy(GElf_Xword, dst, src, p_filesz, NULL);
check_and_copy(GElf_Xword, dst, src, p_memsz, NULL);
check_and_copy(GElf_Xword, dst, src, p_align, NULL);
}
else {
if (valid_class(elf->e_class)) {
seterr(ERROR_UNIMPLEMENTED);
}
else {
seterr(ERROR_UNKNOWN_CLASS);
}
return NULL;
}
if (dst == &buf) {
dst = (GElf_Phdr*)malloc(sizeof(GElf_Phdr));
if (!dst) {
seterr(ERROR_MEM_PHDR);
return NULL;
}
*dst = buf;
}
return dst;
}
int
gelf_update_phdr(Elf *elf, int ndx, GElf_Phdr *src) {
char *tmp;
size_t n;
if (!elf || !src) {
return 0;
}
elf_assert(elf->e_magic == ELF_MAGIC);
tmp = _elf_getphdr(elf, elf->e_class);
if (!tmp) {
return 0;
}
if (ndx < 0 || ndx >= elf->e_phnum) {
seterr(ERROR_BADINDEX);
return 0;
}
n = _msize(elf->e_class, _elf_version, ELF_T_PHDR);
if (n == 0) {
seterr(ERROR_UNIMPLEMENTED);
return 0;
}
if (elf->e_class == ELFCLASS64) {
*(Elf64_Phdr*)(tmp + ndx * n) = *src;
}
else if (elf->e_class == ELFCLASS32) {
Elf32_Phdr *dst = (Elf32_Phdr*)(tmp + ndx * n);
check_and_copy(Elf32_Word, dst, src, p_type, 0);
check_and_copy(Elf32_Off, dst, src, p_offset, 0);
check_and_copy(Elf32_Addr, dst, src, p_vaddr, 0);
check_and_copy(Elf32_Addr, dst, src, p_paddr, 0);
check_and_copy(Elf32_Word, dst, src, p_filesz, 0);
check_and_copy(Elf32_Word, dst, src, p_memsz, 0);
check_and_copy(Elf32_Word, dst, src, p_flags, 0);
check_and_copy(Elf32_Word, dst, src, p_align, 0);
}
else {
if (valid_class(elf->e_class)) {
seterr(ERROR_UNIMPLEMENTED);
}
else {
seterr(ERROR_UNKNOWN_CLASS);
}
return 0;
}
return 1;
}
#endif /* __LIBELF64 */
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