1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Fast user context implementation of clock_gettime, gettimeofday, and time.
4 *
5 * Copyright 2006 Andi Kleen, SUSE Labs.
6 * Copyright 2019 ARM Limited
7 *
8 * 32 Bit compat layer by Stefani Seibold <stefani@seibold.net>
9 * sponsored by Rohde & Schwarz GmbH & Co. KG Munich/Germany
10 */
11 #include <linux/time.h>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14
15 #include "../../../../lib/vdso/gettimeofday.c"
16
17 extern int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
18 extern __kernel_old_time_t __vdso_time(__kernel_old_time_t *t);
19
__vdso_gettimeofday(struct __kernel_old_timeval * tv,struct timezone * tz)20 int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
21 {
22 return __cvdso_gettimeofday(tv, tz);
23 }
24
25 int gettimeofday(struct __kernel_old_timeval *, struct timezone *)
26 __attribute__((weak, alias("__vdso_gettimeofday")));
27
__vdso_time(__kernel_old_time_t * t)28 __kernel_old_time_t __vdso_time(__kernel_old_time_t *t)
29 {
30 return __cvdso_time(t);
31 }
32
33 __kernel_old_time_t time(__kernel_old_time_t *t) __attribute__((weak, alias("__vdso_time")));
34
35
36 #if defined(CONFIG_X86_64) && !defined(BUILD_VDSO32_64)
37 /* both 64-bit and x32 use these */
38 extern int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
39 extern int __vdso_clock_getres(clockid_t clock, struct __kernel_timespec *res);
40
__vdso_clock_gettime(clockid_t clock,struct __kernel_timespec * ts)41 int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
42 {
43 return __cvdso_clock_gettime(clock, ts);
44 }
45
46 int clock_gettime(clockid_t, struct __kernel_timespec *)
47 __attribute__((weak, alias("__vdso_clock_gettime")));
48
__vdso_clock_getres(clockid_t clock,struct __kernel_timespec * res)49 int __vdso_clock_getres(clockid_t clock,
50 struct __kernel_timespec *res)
51 {
52 return __cvdso_clock_getres(clock, res);
53 }
54 int clock_getres(clockid_t, struct __kernel_timespec *)
55 __attribute__((weak, alias("__vdso_clock_getres")));
56
57 #else
58 /* i386 only */
59 extern int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts);
60 extern int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res);
61
__vdso_clock_gettime(clockid_t clock,struct old_timespec32 * ts)62 int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts)
63 {
64 return __cvdso_clock_gettime32(clock, ts);
65 }
66
67 int clock_gettime(clockid_t, struct old_timespec32 *)
68 __attribute__((weak, alias("__vdso_clock_gettime")));
69
__vdso_clock_gettime64(clockid_t clock,struct __kernel_timespec * ts)70 int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts)
71 {
72 return __cvdso_clock_gettime(clock, ts);
73 }
74
75 int clock_gettime64(clockid_t, struct __kernel_timespec *)
76 __attribute__((weak, alias("__vdso_clock_gettime64")));
77
__vdso_clock_getres(clockid_t clock,struct old_timespec32 * res)78 int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res)
79 {
80 return __cvdso_clock_getres_time32(clock, res);
81 }
82
83 int clock_getres(clockid_t, struct old_timespec32 *)
84 __attribute__((weak, alias("__vdso_clock_getres")));
85 #endif
86