82 lines
2.2 KiB
C
Executable File
82 lines
2.2 KiB
C
Executable File
/*
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newscn.c - implementation of the elf_newscn(3) function.
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Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
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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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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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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <private.h>
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static Elf_Scn*
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_buildscn(Elf *elf, size_t size) {
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Elf_Scn *scn;
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elf_assert(elf);
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elf_assert(size);
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elf_assert(_elf_scn_init.s_magic == SCN_MAGIC);
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while ((scn = (Elf_Scn*)malloc(sizeof(*scn) + size))) {
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*scn = _elf_scn_init;
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scn->s_elf = elf;
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scn->s_shdr = (char*)(scn + 1);
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memset(scn->s_shdr, 0, size);
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scn->s_scn_flags = ELF_F_DIRTY;
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scn->s_shdr_flags = ELF_F_DIRTY;
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scn->s_freeme = 1;
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if (elf->e_scn_n) {
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scn->s_index = elf->e_scn_n->s_index + 1;
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elf->e_scn_n->s_link = scn;
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elf->e_scn_n = scn;
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return scn;
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}
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elf_assert(scn->s_index == SHN_UNDEF);
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elf->e_scn_1 = elf->e_scn_n = scn;
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}
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seterr(ERROR_MEM_SCN);
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return NULL;
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}
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Elf_Scn*
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elf_newscn(Elf *elf) {
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Elf_Scn *scn;
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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_ehdr || _elf_cook(elf)) {
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elf_assert(elf->e_ehdr);
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if (elf->e_class == ELFCLASS32) {
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if ((scn = _buildscn(elf, sizeof(Elf32_Shdr)))) {
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((Elf32_Ehdr*)elf->e_ehdr)->e_shnum = scn->s_index + 1;
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elf->e_ehdr_flags |= ELF_F_DIRTY;
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return scn;
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}
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}
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else if (valid_class(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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}
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return NULL;
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}
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