1*f8fb3368SJohn Marino /*-
2*f8fb3368SJohn Marino * Copyright (c) 2006,2008-2009,2011 Joseph Koshy
3*f8fb3368SJohn Marino * All rights reserved.
4*f8fb3368SJohn Marino *
5*f8fb3368SJohn Marino * Redistribution and use in source and binary forms, with or without
6*f8fb3368SJohn Marino * modification, are permitted provided that the following conditions
7*f8fb3368SJohn Marino * are met:
8*f8fb3368SJohn Marino * 1. Redistributions of source code must retain the above copyright
9*f8fb3368SJohn Marino * notice, this list of conditions and the following disclaimer.
10*f8fb3368SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
11*f8fb3368SJohn Marino * notice, this list of conditions and the following disclaimer in the
12*f8fb3368SJohn Marino * documentation and/or other materials provided with the distribution.
13*f8fb3368SJohn Marino *
14*f8fb3368SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*f8fb3368SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*f8fb3368SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*f8fb3368SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*f8fb3368SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*f8fb3368SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*f8fb3368SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*f8fb3368SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*f8fb3368SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*f8fb3368SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*f8fb3368SJohn Marino * SUCH DAMAGE.
25*f8fb3368SJohn Marino */
26*f8fb3368SJohn Marino
27*f8fb3368SJohn Marino #include <assert.h>
28*f8fb3368SJohn Marino #include <libelf.h>
29*f8fb3368SJohn Marino #include <stdlib.h>
30*f8fb3368SJohn Marino
31*f8fb3368SJohn Marino #include "_libelf.h"
32*f8fb3368SJohn Marino
33*f8fb3368SJohn Marino #if ELFTC_HAVE_MMAP
34*f8fb3368SJohn Marino #include <sys/mman.h>
35*f8fb3368SJohn Marino #endif
36*f8fb3368SJohn Marino
37*f8fb3368SJohn Marino ELFTC_VCSID("$Id: elf_end.c 3174 2015-03-27 17:13:41Z emaste $");
38*f8fb3368SJohn Marino
39*f8fb3368SJohn Marino int
elf_end(Elf * e)40*f8fb3368SJohn Marino elf_end(Elf *e)
41*f8fb3368SJohn Marino {
42*f8fb3368SJohn Marino Elf *sv;
43*f8fb3368SJohn Marino Elf_Scn *scn, *tscn;
44*f8fb3368SJohn Marino
45*f8fb3368SJohn Marino if (e == NULL || e->e_activations == 0)
46*f8fb3368SJohn Marino return (0);
47*f8fb3368SJohn Marino
48*f8fb3368SJohn Marino if (--e->e_activations > 0)
49*f8fb3368SJohn Marino return (e->e_activations);
50*f8fb3368SJohn Marino
51*f8fb3368SJohn Marino assert(e->e_activations == 0);
52*f8fb3368SJohn Marino
53*f8fb3368SJohn Marino while (e && e->e_activations == 0) {
54*f8fb3368SJohn Marino switch (e->e_kind) {
55*f8fb3368SJohn Marino case ELF_K_AR:
56*f8fb3368SJohn Marino /*
57*f8fb3368SJohn Marino * If we still have open child descriptors, we
58*f8fb3368SJohn Marino * need to defer reclaiming resources till all
59*f8fb3368SJohn Marino * the child descriptors for the archive are
60*f8fb3368SJohn Marino * closed.
61*f8fb3368SJohn Marino */
62*f8fb3368SJohn Marino if (e->e_u.e_ar.e_nchildren > 0)
63*f8fb3368SJohn Marino return (0);
64*f8fb3368SJohn Marino break;
65*f8fb3368SJohn Marino case ELF_K_ELF:
66*f8fb3368SJohn Marino /*
67*f8fb3368SJohn Marino * Reclaim all section descriptors.
68*f8fb3368SJohn Marino */
69*f8fb3368SJohn Marino STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next,
70*f8fb3368SJohn Marino tscn)
71*f8fb3368SJohn Marino scn = _libelf_release_scn(scn);
72*f8fb3368SJohn Marino break;
73*f8fb3368SJohn Marino case ELF_K_NUM:
74*f8fb3368SJohn Marino assert(0);
75*f8fb3368SJohn Marino default:
76*f8fb3368SJohn Marino break;
77*f8fb3368SJohn Marino }
78*f8fb3368SJohn Marino
79*f8fb3368SJohn Marino if (e->e_rawfile) {
80*f8fb3368SJohn Marino if (e->e_flags & LIBELF_F_RAWFILE_MALLOC)
81*f8fb3368SJohn Marino free(e->e_rawfile);
82*f8fb3368SJohn Marino #if ELFTC_HAVE_MMAP
83*f8fb3368SJohn Marino else if (e->e_flags & LIBELF_F_RAWFILE_MMAP)
84*f8fb3368SJohn Marino (void) munmap(e->e_rawfile, e->e_rawsize);
85*f8fb3368SJohn Marino #endif
86*f8fb3368SJohn Marino }
87*f8fb3368SJohn Marino
88*f8fb3368SJohn Marino sv = e;
89*f8fb3368SJohn Marino if ((e = e->e_parent) != NULL)
90*f8fb3368SJohn Marino e->e_u.e_ar.e_nchildren--;
91*f8fb3368SJohn Marino sv = _libelf_release_elf(sv);
92*f8fb3368SJohn Marino }
93*f8fb3368SJohn Marino
94*f8fb3368SJohn Marino return (0);
95*f8fb3368SJohn Marino }
96