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