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
89
90
91
92
93
94
95
96
97
98
|
/* vDSO common definition for Linux.
Copyright (C) 2015-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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/>. */
#ifndef SYSDEP_VDSO_LINUX_H
# define SYSDEP_VDSO_LINUX_H
#define VDSO_SYMBOL(__name) __vdso_##__name
#ifndef INTERNAL_VSYSCALL_CALL
# define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
funcptr (args)
#endif
#ifdef SHARED
# ifdef HAVE_VSYSCALL
# include <libc-vdso.h>
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
sc_ret = INTERNAL_VSYSCALL_CALL (vdsop, sc_err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long v_ret; \
\
__typeof (__vdso_##name) vdsop = __vdso_##name; \
PTR_DEMANGLE (vdsop); \
if (vdsop != NULL) \
{ \
v_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
# else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
# endif /* HAVE_VSYSCALL */
# else /* SHARED */
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif /* SHARED */
#endif /* SYSDEP_VDSO_LINUX_H */
|
