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