119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*
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* 32.newphdr.c - implementation of the elf{32,64}_newphdr(3) functions.
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* Copyright (C) 1995 - 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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#ifndef lint
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static const char rcsid[] = "@(#) $Id: 32.newphdr.c,v 1.16 2008/05/23 08:15:34 michael Exp $";
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#endif /* lint */
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static char*
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_elf_newphdr(Elf *elf, size_t count, unsigned cls) {
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size_t extcount = 0;
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Elf_Scn *scn = NULL;
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char *phdr = NULL;
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size_t size;
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if (!elf) {
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return NULL;
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}
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elf_assert(elf->e_magic == ELF_MAGIC);
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if (!elf->e_ehdr && !elf->e_readable) {
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seterr(ERROR_NOEHDR);
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}
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else if (elf->e_kind != ELF_K_ELF) {
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seterr(ERROR_NOTELF);
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}
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else if (elf->e_class != cls) {
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seterr(ERROR_CLASSMISMATCH);
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}
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else if (elf->e_ehdr || _elf_cook(elf)) {
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size = _msize(cls, _elf_version, ELF_T_PHDR);
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elf_assert(size);
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if (!(scn = _elf_first_scn(elf))) {
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return NULL;
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}
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if (count) {
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if (!(phdr = (char*)malloc(count * size))) {
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seterr(ERROR_MEM_PHDR);
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return NULL;
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}
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memset(phdr, 0, count * size);
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}
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elf_assert(elf->e_ehdr);
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elf->e_phnum = count;
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if (count >= PN_XNUM) {
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/*
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* get NULL section (create it if necessary)
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*/
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extcount = count;
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count = PN_XNUM;
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}
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if (cls == ELFCLASS32) {
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((Elf32_Ehdr*)elf->e_ehdr)->e_phnum = count;
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scn->s_shdr32.sh_info = extcount;
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}
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#if __LIBELF64
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else if (cls == ELFCLASS64) {
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((Elf64_Ehdr*)elf->e_ehdr)->e_phnum = count;
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scn->s_shdr64.sh_info = extcount;
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}
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#endif /* __LIBELF64 */
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else {
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seterr(ERROR_UNIMPLEMENTED);
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if (phdr) {
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free(phdr);
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}
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return NULL;
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}
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if (elf->e_phdr) {
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free(elf->e_phdr);
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}
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elf->e_phdr = phdr;
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elf->e_phdr_flags |= ELF_F_DIRTY;
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elf->e_ehdr_flags |= ELF_F_DIRTY;
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scn->s_scn_flags |= ELF_F_DIRTY;
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return phdr;
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}
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return NULL;
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}
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Elf32_Phdr*
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elf32_newphdr(Elf *elf, size_t count) {
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return (Elf32_Phdr*)_elf_newphdr(elf, count, ELFCLASS32);
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}
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#if __LIBELF64
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Elf64_Phdr*
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elf64_newphdr(Elf *elf, size_t count) {
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return (Elf64_Phdr*)_elf_newphdr(elf, count, ELFCLASS64);
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}
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unsigned long
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gelf_newphdr(Elf *elf, size_t phnum) {
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if (!valid_class(elf->e_class)) {
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seterr(ERROR_UNKNOWN_CLASS);
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return 0;
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}
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return (unsigned long)_elf_newphdr(elf, phnum, elf->e_class);
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}
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#endif /* __LIBELF64 */
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