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90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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rawdata.c - implementation of the elf_rawdata(3) function.
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Copyright (C) 1995 - 2000 Michael Riepe
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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., 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: rawdata.c,v 1.10 2008/05/23 08:15:35 michael Exp $";
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#endif /* lint */
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Elf_Data*
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elf_rawdata(Elf_Scn *scn, Elf_Data *data) {
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Scn_Data *sd;
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Elf *elf;
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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 = scn->s_elf;
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elf_assert(elf);
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elf_assert(elf->e_magic == ELF_MAGIC);
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if (!elf->e_readable) {
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return NULL;
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}
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else if (scn->s_index == SHN_UNDEF || scn->s_type == SHT_NULL) {
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seterr(ERROR_NULLSCN);
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}
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else if (data) {
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return NULL;
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}
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else if ((sd = scn->s_rawdata)) {
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elf_assert(sd->sd_magic == DATA_MAGIC);
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elf_assert(sd->sd_scn == scn);
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return &sd->sd_data;
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}
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else if (scn->s_offset < 0 || scn->s_offset > elf->e_size) {
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seterr(ERROR_OUTSIDE);
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}
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else if (scn->s_type != SHT_NOBITS
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&& scn->s_offset + scn->s_size > elf->e_size) {
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seterr(ERROR_TRUNC_SCN);
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}
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else if (!(sd = (Scn_Data*)malloc(sizeof(*sd)))) {
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seterr(ERROR_MEM_SCNDATA);
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}
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else {
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*sd = _elf_data_init;
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sd->sd_scn = scn;
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sd->sd_freeme = 1;
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sd->sd_data.d_size = scn->s_size;
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sd->sd_data.d_version = _elf_version;
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if (scn->s_type != SHT_NOBITS && scn->s_size) {
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if (!(sd->sd_memdata = (char*)malloc(scn->s_size))) {
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seterr(ERROR_IO_2BIG);
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free(sd);
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return NULL;
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}
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else if (elf->e_rawdata) {
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memcpy(sd->sd_memdata, elf->e_rawdata + scn->s_offset, scn->s_size);
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}
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else if (!_elf_read(elf, sd->sd_memdata, scn->s_offset, scn->s_size)) {
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free(sd->sd_memdata);
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free(sd);
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return NULL;
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}
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sd->sd_data.d_buf = sd->sd_memdata;
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sd->sd_free_data = 1;
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}
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scn->s_rawdata = sd;
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return &sd->sd_data;
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}
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return NULL;
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}
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