75 lines
2.1 KiB
C
Executable File
75 lines
2.1 KiB
C
Executable File
/*
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rawdata.c - implementation of the elf_rawdata(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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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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return (Elf_Data*)sd;
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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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scn->s_rawdata = sd;
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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 || !scn->s_size) {
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return (Elf_Data*)sd;
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}
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else if (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->sd_memdata = _elf_read(elf, NULL, scn->s_offset, scn->s_size))) {
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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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return (Elf_Data*)sd;
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}
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scn->s_rawdata = NULL;
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free(sd);
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}
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return NULL;
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}
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