1*0a6a1f1dSLionel Sambuc /* $NetBSD: elf_end.c,v 1.2 2014/03/09 16:58:04 christos Exp $ */
2*0a6a1f1dSLionel Sambuc
3*0a6a1f1dSLionel Sambuc /*-
4*0a6a1f1dSLionel Sambuc * Copyright (c) 2006,2008-2009,2011 Joseph Koshy
5*0a6a1f1dSLionel Sambuc * All rights reserved.
6*0a6a1f1dSLionel Sambuc *
7*0a6a1f1dSLionel Sambuc * Redistribution and use in source and binary forms, with or without
8*0a6a1f1dSLionel Sambuc * modification, are permitted provided that the following conditions
9*0a6a1f1dSLionel Sambuc * are met:
10*0a6a1f1dSLionel Sambuc * 1. Redistributions of source code must retain the above copyright
11*0a6a1f1dSLionel Sambuc * notice, this list of conditions and the following disclaimer.
12*0a6a1f1dSLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
13*0a6a1f1dSLionel Sambuc * notice, this list of conditions and the following disclaimer in the
14*0a6a1f1dSLionel Sambuc * documentation and/or other materials provided with the distribution.
15*0a6a1f1dSLionel Sambuc *
16*0a6a1f1dSLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17*0a6a1f1dSLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18*0a6a1f1dSLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19*0a6a1f1dSLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20*0a6a1f1dSLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21*0a6a1f1dSLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22*0a6a1f1dSLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23*0a6a1f1dSLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24*0a6a1f1dSLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*0a6a1f1dSLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*0a6a1f1dSLionel Sambuc * SUCH DAMAGE.
27*0a6a1f1dSLionel Sambuc */
28*0a6a1f1dSLionel Sambuc
29*0a6a1f1dSLionel Sambuc #if HAVE_NBTOOL_CONFIG_H
30*0a6a1f1dSLionel Sambuc # include "nbtool_config.h"
31*0a6a1f1dSLionel Sambuc #endif
32*0a6a1f1dSLionel Sambuc
33*0a6a1f1dSLionel Sambuc #include <sys/cdefs.h>
34*0a6a1f1dSLionel Sambuc
35*0a6a1f1dSLionel Sambuc #include <assert.h>
36*0a6a1f1dSLionel Sambuc #include <libelf.h>
37*0a6a1f1dSLionel Sambuc #include <stdlib.h>
38*0a6a1f1dSLionel Sambuc
39*0a6a1f1dSLionel Sambuc #include "_libelf.h"
40*0a6a1f1dSLionel Sambuc
41*0a6a1f1dSLionel Sambuc #if ELFTC_HAVE_MMAP
42*0a6a1f1dSLionel Sambuc #include <sys/mman.h>
43*0a6a1f1dSLionel Sambuc #endif
44*0a6a1f1dSLionel Sambuc
45*0a6a1f1dSLionel Sambuc __RCSID("$NetBSD: elf_end.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
46*0a6a1f1dSLionel Sambuc ELFTC_VCSID("Id: elf_end.c 2240 2011-11-28 06:36:48Z jkoshy ");
47*0a6a1f1dSLionel Sambuc
48*0a6a1f1dSLionel Sambuc int
elf_end(Elf * e)49*0a6a1f1dSLionel Sambuc elf_end(Elf *e)
50*0a6a1f1dSLionel Sambuc {
51*0a6a1f1dSLionel Sambuc Elf *sv;
52*0a6a1f1dSLionel Sambuc Elf_Scn *scn, *tscn;
53*0a6a1f1dSLionel Sambuc
54*0a6a1f1dSLionel Sambuc if (e == NULL || e->e_activations == 0)
55*0a6a1f1dSLionel Sambuc return (0);
56*0a6a1f1dSLionel Sambuc
57*0a6a1f1dSLionel Sambuc if (--e->e_activations > 0)
58*0a6a1f1dSLionel Sambuc return (e->e_activations);
59*0a6a1f1dSLionel Sambuc
60*0a6a1f1dSLionel Sambuc assert(e->e_activations == 0);
61*0a6a1f1dSLionel Sambuc
62*0a6a1f1dSLionel Sambuc while (e && e->e_activations == 0) {
63*0a6a1f1dSLionel Sambuc switch (e->e_kind) {
64*0a6a1f1dSLionel Sambuc case ELF_K_AR:
65*0a6a1f1dSLionel Sambuc /*
66*0a6a1f1dSLionel Sambuc * If we still have open child descriptors, we
67*0a6a1f1dSLionel Sambuc * need to defer reclaiming resources till all
68*0a6a1f1dSLionel Sambuc * the child descriptors for the archive are
69*0a6a1f1dSLionel Sambuc * closed.
70*0a6a1f1dSLionel Sambuc */
71*0a6a1f1dSLionel Sambuc if (e->e_u.e_ar.e_nchildren > 0)
72*0a6a1f1dSLionel Sambuc return (0);
73*0a6a1f1dSLionel Sambuc break;
74*0a6a1f1dSLionel Sambuc case ELF_K_ELF:
75*0a6a1f1dSLionel Sambuc /*
76*0a6a1f1dSLionel Sambuc * Reclaim all section descriptors.
77*0a6a1f1dSLionel Sambuc */
78*0a6a1f1dSLionel Sambuc STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next,
79*0a6a1f1dSLionel Sambuc tscn)
80*0a6a1f1dSLionel Sambuc scn = _libelf_release_scn(scn);
81*0a6a1f1dSLionel Sambuc break;
82*0a6a1f1dSLionel Sambuc case ELF_K_NUM:
83*0a6a1f1dSLionel Sambuc assert(0);
84*0a6a1f1dSLionel Sambuc default:
85*0a6a1f1dSLionel Sambuc break;
86*0a6a1f1dSLionel Sambuc }
87*0a6a1f1dSLionel Sambuc
88*0a6a1f1dSLionel Sambuc if (e->e_rawfile) {
89*0a6a1f1dSLionel Sambuc if (e->e_flags & LIBELF_F_RAWFILE_MALLOC)
90*0a6a1f1dSLionel Sambuc free(e->e_rawfile);
91*0a6a1f1dSLionel Sambuc #if ELFTC_HAVE_MMAP
92*0a6a1f1dSLionel Sambuc else if (e->e_flags & LIBELF_F_RAWFILE_MMAP)
93*0a6a1f1dSLionel Sambuc (void) munmap(e->e_rawfile, e->e_rawsize);
94*0a6a1f1dSLionel Sambuc #endif
95*0a6a1f1dSLionel Sambuc }
96*0a6a1f1dSLionel Sambuc
97*0a6a1f1dSLionel Sambuc sv = e;
98*0a6a1f1dSLionel Sambuc if ((e = e->e_parent) != NULL)
99*0a6a1f1dSLionel Sambuc e->e_u.e_ar.e_nchildren--;
100*0a6a1f1dSLionel Sambuc sv = _libelf_release_elf(sv);
101*0a6a1f1dSLionel Sambuc }
102*0a6a1f1dSLionel Sambuc
103*0a6a1f1dSLionel Sambuc return (0);
104*0a6a1f1dSLionel Sambuc }
105