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89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*-
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* Copyright (c) 2006 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/mman.h>
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#include <assert.h>
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#include <libelf.h>
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#include <stdlib.h>
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#include "_libelf.h"
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int
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elf_end(Elf *e)
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{
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Elf *sv;
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Elf_Scn *scn, *tscn;
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if (e == NULL || e->e_activations == 0)
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return (0);
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if (--e->e_activations > 0)
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return (e->e_activations);
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assert(e->e_activations == 0);
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while (e && e->e_activations == 0) {
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switch (e->e_kind) {
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case ELF_K_AR:
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/*
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* If we still have open child descriptors, we
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* need to defer reclaiming resources till all
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* the child descriptors for the archive are
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* closed.
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*/
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if (e->e_u.e_ar.e_nchildren > 0)
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return (0);
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break;
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case ELF_K_ELF:
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/*
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* Reclaim all section descriptors.
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*/
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STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next, tscn)
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scn = _libelf_release_scn(scn);
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break;
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case ELF_K_NUM:
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assert(0);
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default:
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break;
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}
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if (e->e_flags & LIBELF_F_MMAP)
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(void) munmap(e->e_rawfile, e->e_rawsize);
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sv = e;
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if ((e = e->e_parent) != NULL)
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e->e_u.e_ar.e_nchildren--;
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sv = _libelf_release_elf(sv);
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}
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return (0);
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}
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