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