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 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 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 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 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 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 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 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