1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ 2 /* 3 * time function definitions for NOLIBC 4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu> 5 */ 6 7 /* make sure to include all global symbols */ 8 #include "nolibc.h" 9 10 #ifndef _NOLIBC_TIME_H 11 #define _NOLIBC_TIME_H 12 13 #include "std.h" 14 #include "arch.h" 15 #include "types.h" 16 #include "sys.h" 17 18 #include <linux/signal.h> 19 #include <linux/time.h> 20 21 static __inline__ 22 void __nolibc_timespec_user_to_kernel(const struct timespec *ts, struct __kernel_timespec *kts) 23 { 24 kts->tv_sec = ts->tv_sec; 25 kts->tv_nsec = ts->tv_nsec; 26 } 27 28 static __inline__ 29 void __nolibc_timespec_kernel_to_user(const struct __kernel_timespec *kts, struct timespec *ts) 30 { 31 ts->tv_sec = kts->tv_sec; 32 ts->tv_nsec = kts->tv_nsec; 33 } 34 35 /* 36 * int clock_getres(clockid_t clockid, struct timespec *res); 37 * int clock_gettime(clockid_t clockid, struct timespec *tp); 38 * int clock_settime(clockid_t clockid, const struct timespec *tp); 39 * int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, 40 * struct timespec *rmtp) 41 */ 42 43 static __attribute__((unused)) 44 int sys_clock_getres(clockid_t clockid, struct timespec *res) 45 { 46 #if defined(__NR_clock_getres) 47 return my_syscall2(__NR_clock_getres, clockid, res); 48 #elif defined(__NR_clock_getres_time64) 49 struct __kernel_timespec kres; 50 int ret; 51 52 ret = my_syscall2(__NR_clock_getres_time64, clockid, &kres); 53 if (res) 54 __nolibc_timespec_kernel_to_user(&kres, res); 55 return ret; 56 #else 57 return __nolibc_enosys(__func__, clockid, res); 58 #endif 59 } 60 61 static __attribute__((unused)) 62 int clock_getres(clockid_t clockid, struct timespec *res) 63 { 64 return __sysret(sys_clock_getres(clockid, res)); 65 } 66 67 static __attribute__((unused)) 68 int sys_clock_gettime(clockid_t clockid, struct timespec *tp) 69 { 70 #if defined(__NR_clock_gettime) 71 return my_syscall2(__NR_clock_gettime, clockid, tp); 72 #elif defined(__NR_clock_gettime64) 73 struct __kernel_timespec ktp; 74 int ret; 75 76 ret = my_syscall2(__NR_clock_gettime64, clockid, &ktp); 77 if (tp) 78 __nolibc_timespec_kernel_to_user(&ktp, tp); 79 return ret; 80 #else 81 return __nolibc_enosys(__func__, clockid, tp); 82 #endif 83 } 84 85 static __attribute__((unused)) 86 int clock_gettime(clockid_t clockid, struct timespec *tp) 87 { 88 return __sysret(sys_clock_gettime(clockid, tp)); 89 } 90 91 static __attribute__((unused)) 92 int sys_clock_settime(clockid_t clockid, struct timespec *tp) 93 { 94 #if defined(__NR_clock_settime) 95 return my_syscall2(__NR_clock_settime, clockid, tp); 96 #elif defined(__NR_clock_settime64) 97 struct __kernel_timespec ktp; 98 99 __nolibc_timespec_user_to_kernel(tp, &ktp); 100 return my_syscall2(__NR_clock_settime64, clockid, &ktp); 101 #else 102 return __nolibc_enosys(__func__, clockid, tp); 103 #endif 104 } 105 106 static __attribute__((unused)) 107 int clock_settime(clockid_t clockid, struct timespec *tp) 108 { 109 return __sysret(sys_clock_settime(clockid, tp)); 110 } 111 112 static __attribute__((unused)) 113 int sys_clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, 114 struct timespec *rmtp) 115 { 116 #if defined(__NR_clock_nanosleep) 117 return my_syscall4(__NR_clock_nanosleep, clockid, flags, rqtp, rmtp); 118 #elif defined(__NR_clock_nanosleep_time64) 119 struct __kernel_timespec krqtp, krmtp; 120 int ret; 121 122 __nolibc_timespec_user_to_kernel(rqtp, &krqtp); 123 ret = my_syscall4(__NR_clock_nanosleep_time64, clockid, flags, &krqtp, &krmtp); 124 if (rmtp) 125 __nolibc_timespec_kernel_to_user(&krmtp, rmtp); 126 return ret; 127 #else 128 return __nolibc_enosys(__func__, clockid, flags, rqtp, rmtp); 129 #endif 130 } 131 132 static __attribute__((unused)) 133 int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, 134 struct timespec *rmtp) 135 { 136 /* Directly return a positive error number */ 137 return -sys_clock_nanosleep(clockid, flags, rqtp, rmtp); 138 } 139 140 static __inline__ 141 double difftime(time_t time1, time_t time2) 142 { 143 return time1 - time2; 144 } 145 146 static __inline__ 147 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp) 148 { 149 return __sysret(sys_clock_nanosleep(CLOCK_REALTIME, 0, rqtp, rmtp)); 150 } 151 152 153 static __attribute__((unused)) 154 time_t time(time_t *tptr) 155 { 156 struct timeval tv; 157 158 /* note, cannot fail here */ 159 sys_gettimeofday(&tv, NULL); 160 161 if (tptr) 162 *tptr = tv.tv_sec; 163 return tv.tv_sec; 164 } 165 166 167 /* 168 * int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid); 169 * int timer_gettime(timer_t timerid, struct itimerspec *curr_value); 170 * int timer_settime(timer_t timerid, int flags, const struct itimerspec *new_value, struct itimerspec *old_value); 171 */ 172 173 static __attribute__((unused)) 174 int sys_timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 175 { 176 return my_syscall3(__NR_timer_create, clockid, evp, timerid); 177 } 178 179 static __attribute__((unused)) 180 int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 181 { 182 return __sysret(sys_timer_create(clockid, evp, timerid)); 183 } 184 185 static __attribute__((unused)) 186 int sys_timer_delete(timer_t timerid) 187 { 188 return my_syscall1(__NR_timer_delete, timerid); 189 } 190 191 static __attribute__((unused)) 192 int timer_delete(timer_t timerid) 193 { 194 return __sysret(sys_timer_delete(timerid)); 195 } 196 197 static __attribute__((unused)) 198 int sys_timer_gettime(timer_t timerid, struct itimerspec *curr_value) 199 { 200 #if defined(__NR_timer_gettime) 201 return my_syscall2(__NR_timer_gettime, timerid, curr_value); 202 #elif defined(__NR_timer_gettime64) 203 struct __kernel_itimerspec kcurr_value; 204 int ret; 205 206 ret = my_syscall2(__NR_timer_gettime64, timerid, &kcurr_value); 207 __nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval); 208 __nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value); 209 return ret; 210 #else 211 return __nolibc_enosys(__func__, timerid, curr_value); 212 #endif 213 } 214 215 static __attribute__((unused)) 216 int timer_gettime(timer_t timerid, struct itimerspec *curr_value) 217 { 218 return __sysret(sys_timer_gettime(timerid, curr_value)); 219 } 220 221 static __attribute__((unused)) 222 int sys_timer_settime(timer_t timerid, int flags, 223 const struct itimerspec *new_value, struct itimerspec *old_value) 224 { 225 #if defined(__NR_timer_settime) 226 return my_syscall4(__NR_timer_settime, timerid, flags, new_value, old_value); 227 #elif defined(__NR_timer_settime64) 228 struct __kernel_itimerspec knew_value, kold_value; 229 int ret; 230 231 __nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value); 232 __nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval); 233 ret = my_syscall4(__NR_timer_settime64, timerid, flags, &knew_value, &kold_value); 234 if (old_value) { 235 __nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval); 236 __nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value); 237 } 238 return ret; 239 #else 240 return __nolibc_enosys(__func__, timerid, flags, new_value, old_value); 241 #endif 242 } 243 244 static __attribute__((unused)) 245 int timer_settime(timer_t timerid, int flags, 246 const struct itimerspec *new_value, struct itimerspec *old_value) 247 { 248 return __sysret(sys_timer_settime(timerid, flags, new_value, old_value)); 249 } 250 251 #endif /* _NOLIBC_TIME_H */ 252