blob: 384a96c16dbbfb6da7abd1de429563eb990d5a2a (
plain) (
blame)
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
|
/* Initialization code run first thing by the ELF startup code. Linux/m68k.
Copyright (C) 2010-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
/* Note: linking in vDSO to a static binary requires changes to
the main GLIBC proper. Not yet implemented. */
#ifdef SHARED
#include <dl-vdso.h>
#include <m68k-vdso.h>
static inline void
_libc_vdso_platform_setup (void)
{
void *p;
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
/* It may happen that rtld didn't initialize the vDSO, so fallback
to the syscall implementations if _dl_vdso_vsym returns NULL.
This may happen when a static executable dlopen's a dynamic library.
This really is nothing more than a workaround for rtld/csu
deficiency. Ideally, init code would setup the vDSO for static
binaries too. */
p = _dl_vdso_vsym ("__kernel_read_tp", &linux26);
if (p != NULL)
{
__vdso_read_tp = p;
__rtld___vdso_read_tp = p;
}
else
assert (__vdso_read_tp == (void *) __vdso_read_tp_stub);
p = _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26);
if (p != NULL)
{
__vdso_atomic_cmpxchg_32 = p;
__rtld___vdso_atomic_cmpxchg_32 = p;
}
else
assert (__vdso_atomic_cmpxchg_32
== (void *) __vdso_atomic_cmpxchg_32_stub);
p = _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26);
if (p != NULL)
{
__vdso_atomic_barrier = p;
__rtld___vdso_atomic_barrier = p;
}
else
assert (__vdso_atomic_barrier == (void *) __vdso_atomic_barrier_stub);
}
#define VDSO_SETUP _libc_vdso_platform_setup
#endif /* SHARED */
#include <csu/init-first.c>
|
