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/*
* end.c - implementation of the elf_end(3) function.
* Copyright (C) 1995 - 2004 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: end.c,v 1.12 2008/05/23 08:15:34 michael Exp $";
#endif /* lint */
#if HAVE_MMAP
#include <sys/mman.h>
#endif /* HAVE_MMAP */
static void _elf_free(void *ptr) {
if (ptr) {
free(ptr);
}
}
static void _elf_free_scns(Elf *elf, Elf_Scn *scn) {
Scn_Data *sd, *tmp;
Elf_Scn *freescn;
for (freescn = NULL; scn; scn = scn->s_link) {
elf_assert(scn->s_magic == SCN_MAGIC);
elf_assert(scn->s_elf == elf);
for (sd = scn->s_data_1; sd; sd = tmp) {
elf_assert(sd->sd_magic == DATA_MAGIC);
elf_assert(sd->sd_scn == scn);
tmp = sd->sd_link;
if (sd->sd_free_data) {
_elf_free(sd->sd_memdata);
}
if (sd->sd_freeme) {
free(sd);
}
}
if ((sd = scn->s_rawdata)) {
elf_assert(sd->sd_magic == DATA_MAGIC);
elf_assert(sd->sd_scn == scn);
if (sd->sd_free_data) {
_elf_free(sd->sd_memdata);
}
if (sd->sd_freeme) {
free(sd);
}
}
if (scn->s_freeme) {
_elf_free(freescn);
freescn = scn;
}
}
_elf_free(freescn);
}
int elf_end(Elf *elf) {
Elf **siblings;
if (!elf) {
return 0;
}
elf_assert(elf->e_magic == ELF_MAGIC);
if (--elf->e_count) {
return elf->e_count;
}
if (elf->e_parent) {
elf_assert(elf->e_parent->e_magic == ELF_MAGIC);
elf_assert(elf->e_parent->e_kind == ELF_K_AR);
siblings = &elf->e_parent->e_members;
while (*siblings) {
if (*siblings == elf) {
*siblings = elf->e_link;
break;
}
siblings = &(*siblings)->e_link;
}
elf_end(elf->e_parent);
_elf_free(elf->e_arhdr);
}
#if HAVE_MMAP
else if (elf->e_unmap_data) {
munmap(elf->e_data, elf->e_size);
}
#endif /* HAVE_MMAP */
else if (!elf->e_memory) {
_elf_free(elf->e_data);
}
_elf_free_scns(elf, elf->e_scn_1);
if (elf->e_rawdata != elf->e_data) {
_elf_free(elf->e_rawdata);
}
if (elf->e_free_syms) {
_elf_free(elf->e_symtab);
}
_elf_free(elf->e_ehdr);
_elf_free(elf->e_phdr);
free(elf);
return 0;
}
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