arch/x86/entry/vdso/vclock_gettime.c

   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 #include <vdso/gettime.h>
  15
  16 #include "../../../../lib/vdso/gettimeofday.c"
  17
  18 int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
  19 {
  20         return __cvdso_gettimeofday(tv, tz);
  21 }
  22
  23 int gettimeofday(struct __kernel_old_timeval *, struct timezone *)
  24         __attribute__((weak, alias("__vdso_gettimeofday")));
  25
  26 __kernel_old_time_t __vdso_time(__kernel_old_time_t *t)
  27 {
  28         return __cvdso_time(t);
  29 }
  30
  31 __kernel_old_time_t time(__kernel_old_time_t *t)        __attribute__((weak, alias("__vdso_time")));
  32
  33
  34 #if defined(CONFIG_X86_64) && !defined(BUILD_VDSO32_64)
  35 /* both 64-bit and x32 use these */
  36 int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
  37 {
  38         return __cvdso_clock_gettime(clock, ts);
  39 }
  40
  41 int clock_gettime(clockid_t, struct __kernel_timespec *)
  42         __attribute__((weak, alias("__vdso_clock_gettime")));
  43
  44 int __vdso_clock_getres(clockid_t clock,
  45                         struct __kernel_timespec *res)
  46 {
  47         return __cvdso_clock_getres(clock, res);
  48 }
  49 int clock_getres(clockid_t, struct __kernel_timespec *)
  50         __attribute__((weak, alias("__vdso_clock_getres")));
  51
  52 #else
  53 /* i386 only */
  54 int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts)
  55 {
  56         return __cvdso_clock_gettime32(clock, ts);
  57 }
  58
  59 int clock_gettime(clockid_t, struct old_timespec32 *)
  60         __attribute__((weak, alias("__vdso_clock_gettime")));
  61
  62 int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts)
  63 {
  64         return __cvdso_clock_gettime(clock, ts);
  65 }
  66
  67 int clock_gettime64(clockid_t, struct __kernel_timespec *)
  68         __attribute__((weak, alias("__vdso_clock_gettime64")));
  69
  70 int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res)
  71 {
  72         return __cvdso_clock_getres_time32(clock, res);
  73 }
  74
  75 int clock_getres(clockid_t, struct old_timespec32 *)
  76         __attribute__((weak, alias("__vdso_clock_getres")));
  77 #endif