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 #else 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 #endif 57 } 58 59 static __attribute__((unused)) 60 int clock_getres(clockid_t clockid, struct timespec *res) 61 { 62 return __sysret(sys_clock_getres(clockid, res)); 63 } 64 65 static __attribute__((unused)) 66 int sys_clock_gettime(clockid_t clockid, struct timespec *tp) 67 { 68 #if defined(__NR_clock_gettime) 69 return my_syscall2(__NR_clock_gettime, clockid, tp); 70 #else 71 struct __kernel_timespec ktp; 72 int ret; 73 74 ret = my_syscall2(__NR_clock_gettime64, clockid, &ktp); 75 if (tp) 76 __nolibc_timespec_kernel_to_user(&ktp, tp); 77 return ret; 78 #endif 79 } 80 81 static __attribute__((unused)) 82 int clock_gettime(clockid_t clockid, struct timespec *tp) 83 { 84 return __sysret(sys_clock_gettime(clockid, tp)); 85 } 86 87 static __attribute__((unused)) 88 int sys_clock_settime(clockid_t clockid, struct timespec *tp) 89 { 90 #if defined(__NR_clock_settime) 91 return my_syscall2(__NR_clock_settime, clockid, tp); 92 #elif defined(__NR_clock_settime64) 93 struct __kernel_timespec ktp; 94 95 __nolibc_timespec_user_to_kernel(tp, &ktp); 96 return my_syscall2(__NR_clock_settime64, clockid, &ktp); 97 #else 98 return __nolibc_enosys(__func__, clockid, tp); 99 #endif 100 } 101 102 static __attribute__((unused)) 103 int clock_settime(clockid_t clockid, struct timespec *tp) 104 { 105 return __sysret(sys_clock_settime(clockid, tp)); 106 } 107 108 static __attribute__((unused)) 109 int sys_clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, 110 struct timespec *rmtp) 111 { 112 #if defined(__NR_clock_nanosleep) 113 return my_syscall4(__NR_clock_nanosleep, clockid, flags, rqtp, rmtp); 114 #elif defined(__NR_clock_nanosleep_time64) 115 struct __kernel_timespec krqtp, krmtp; 116 int ret; 117 118 __nolibc_timespec_user_to_kernel(rqtp, &krqtp); 119 ret = my_syscall4(__NR_clock_nanosleep_time64, clockid, flags, &krqtp, &krmtp); 120 if (rmtp) 121 __nolibc_timespec_kernel_to_user(&krmtp, rmtp); 122 return ret; 123 #else 124 return __nolibc_enosys(__func__, clockid, flags, rqtp, rmtp); 125 #endif 126 } 127 128 static __attribute__((unused)) 129 int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, 130 struct timespec *rmtp) 131 { 132 /* Directly return a positive error number */ 133 return -sys_clock_nanosleep(clockid, flags, rqtp, rmtp); 134 } 135 136 static __inline__ 137 double difftime(time_t time1, time_t time2) 138 { 139 return time1 - time2; 140 } 141 142 static __inline__ 143 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp) 144 { 145 return __sysret(sys_clock_nanosleep(CLOCK_REALTIME, 0, rqtp, rmtp)); 146 } 147 148 149 static __attribute__((unused)) 150 time_t time(time_t *tptr) 151 { 152 struct timeval tv; 153 154 /* note, cannot fail here */ 155 sys_gettimeofday(&tv, NULL); 156 157 if (tptr) 158 *tptr = tv.tv_sec; 159 return tv.tv_sec; 160 } 161 162 163 /* 164 * int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid); 165 * int timer_gettime(timer_t timerid, struct itimerspec *curr_value); 166 * int timer_settime(timer_t timerid, int flags, const struct itimerspec *new_value, struct itimerspec *old_value); 167 */ 168 169 static __attribute__((unused)) 170 int sys_timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 171 { 172 return my_syscall3(__NR_timer_create, clockid, evp, timerid); 173 } 174 175 static __attribute__((unused)) 176 int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 177 { 178 return __sysret(sys_timer_create(clockid, evp, timerid)); 179 } 180 181 static __attribute__((unused)) 182 int sys_timer_delete(timer_t timerid) 183 { 184 return my_syscall1(__NR_timer_delete, timerid); 185 } 186 187 static __attribute__((unused)) 188 int timer_delete(timer_t timerid) 189 { 190 return __sysret(sys_timer_delete(timerid)); 191 } 192 193 static __attribute__((unused)) 194 int sys_timer_gettime(timer_t timerid, struct itimerspec *curr_value) 195 { 196 #if defined(__NR_timer_gettime) 197 return my_syscall2(__NR_timer_gettime, timerid, curr_value); 198 #elif defined(__NR_timer_gettime64) 199 struct __kernel_itimerspec kcurr_value; 200 int ret; 201 202 ret = my_syscall2(__NR_timer_gettime64, timerid, &kcurr_value); 203 __nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval); 204 __nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value); 205 return ret; 206 #else 207 return __nolibc_enosys(__func__, timerid, curr_value); 208 #endif 209 } 210 211 static __attribute__((unused)) 212 int timer_gettime(timer_t timerid, struct itimerspec *curr_value) 213 { 214 return __sysret(sys_timer_gettime(timerid, curr_value)); 215 } 216 217 static __attribute__((unused)) 218 int sys_timer_settime(timer_t timerid, int flags, 219 const struct itimerspec *new_value, struct itimerspec *old_value) 220 { 221 #if defined(__NR_timer_settime) 222 return my_syscall4(__NR_timer_settime, timerid, flags, new_value, old_value); 223 #elif defined(__NR_timer_settime64) 224 struct __kernel_itimerspec knew_value, kold_value; 225 int ret; 226 227 __nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value); 228 __nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval); 229 ret = my_syscall4(__NR_timer_settime64, timerid, flags, &knew_value, &kold_value); 230 if (old_value) { 231 __nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval); 232 __nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value); 233 } 234 return ret; 235 #else 236 return __nolibc_enosys(__func__, timerid, flags, new_value, old_value); 237 #endif 238 } 239 240 static __attribute__((unused)) 241 int timer_settime(timer_t timerid, int flags, 242 const struct itimerspec *new_value, struct itimerspec *old_value) 243 { 244 return __sysret(sys_timer_settime(timerid, flags, new_value, old_value)); 245 } 246 247 #endif /* _NOLIBC_TIME_H */ 248