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__
__nolibc_timespec_user_to_kernel(const struct timespec * ts,struct __kernel_timespec * kts)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__
__nolibc_timespec_kernel_to_user(const struct __kernel_timespec * kts,struct timespec * ts)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 */
40
41 static __attribute__((unused))
sys_clock_getres(clockid_t clockid,struct timespec * res)42 int sys_clock_getres(clockid_t clockid, struct timespec *res)
43 {
44 #if defined(__NR_clock_getres)
45 return my_syscall2(__NR_clock_getres, clockid, res);
46 #elif defined(__NR_clock_getres_time64)
47 struct __kernel_timespec kres;
48 int ret;
49
50 ret = my_syscall2(__NR_clock_getres_time64, clockid, &kres);
51 if (res)
52 __nolibc_timespec_kernel_to_user(&kres, res);
53 return ret;
54 #else
55 return __nolibc_enosys(__func__, clockid, res);
56 #endif
57 }
58
59 static __attribute__((unused))
clock_getres(clockid_t clockid,struct timespec * res)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))
sys_clock_gettime(clockid_t clockid,struct timespec * tp)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 #elif defined(__NR_clock_gettime64)
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 #else
79 return __nolibc_enosys(__func__, clockid, tp);
80 #endif
81 }
82
83 static __attribute__((unused))
clock_gettime(clockid_t clockid,struct timespec * tp)84 int clock_gettime(clockid_t clockid, struct timespec *tp)
85 {
86 return __sysret(sys_clock_gettime(clockid, tp));
87 }
88
89 static __attribute__((unused))
sys_clock_settime(clockid_t clockid,struct timespec * tp)90 int sys_clock_settime(clockid_t clockid, struct timespec *tp)
91 {
92 #if defined(__NR_clock_settime)
93 return my_syscall2(__NR_clock_settime, clockid, tp);
94 #elif defined(__NR_clock_settime64)
95 struct __kernel_timespec ktp;
96
97 __nolibc_timespec_user_to_kernel(tp, &ktp);
98 return my_syscall2(__NR_clock_settime64, clockid, &ktp);
99 #else
100 return __nolibc_enosys(__func__, clockid, tp);
101 #endif
102 }
103
104 static __attribute__((unused))
clock_settime(clockid_t clockid,struct timespec * tp)105 int clock_settime(clockid_t clockid, struct timespec *tp)
106 {
107 return __sysret(sys_clock_settime(clockid, tp));
108 }
109
110
111 static __inline__
difftime(time_t time1,time_t time2)112 double difftime(time_t time1, time_t time2)
113 {
114 return time1 - time2;
115 }
116
117
118 static __attribute__((unused))
time(time_t * tptr)119 time_t time(time_t *tptr)
120 {
121 struct timeval tv;
122
123 /* note, cannot fail here */
124 sys_gettimeofday(&tv, NULL);
125
126 if (tptr)
127 *tptr = tv.tv_sec;
128 return tv.tv_sec;
129 }
130
131
132 /*
133 * int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid);
134 * int timer_gettime(timer_t timerid, struct itimerspec *curr_value);
135 * int timer_settime(timer_t timerid, int flags, const struct itimerspec *new_value, struct itimerspec *old_value);
136 */
137
138 static __attribute__((unused))
sys_timer_create(clockid_t clockid,struct sigevent * evp,timer_t * timerid)139 int sys_timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
140 {
141 return my_syscall3(__NR_timer_create, clockid, evp, timerid);
142 }
143
144 static __attribute__((unused))
timer_create(clockid_t clockid,struct sigevent * evp,timer_t * timerid)145 int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
146 {
147 return __sysret(sys_timer_create(clockid, evp, timerid));
148 }
149
150 static __attribute__((unused))
sys_timer_delete(timer_t timerid)151 int sys_timer_delete(timer_t timerid)
152 {
153 return my_syscall1(__NR_timer_delete, timerid);
154 }
155
156 static __attribute__((unused))
timer_delete(timer_t timerid)157 int timer_delete(timer_t timerid)
158 {
159 return __sysret(sys_timer_delete(timerid));
160 }
161
162 static __attribute__((unused))
sys_timer_gettime(timer_t timerid,struct itimerspec * curr_value)163 int sys_timer_gettime(timer_t timerid, struct itimerspec *curr_value)
164 {
165 #if defined(__NR_timer_gettime)
166 return my_syscall2(__NR_timer_gettime, timerid, curr_value);
167 #elif defined(__NR_timer_gettime64)
168 struct __kernel_itimerspec kcurr_value;
169 int ret;
170
171 ret = my_syscall2(__NR_timer_gettime64, timerid, &kcurr_value);
172 __nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval);
173 __nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value);
174 return ret;
175 #else
176 return __nolibc_enosys(__func__, timerid, curr_value);
177 #endif
178 }
179
180 static __attribute__((unused))
timer_gettime(timer_t timerid,struct itimerspec * curr_value)181 int timer_gettime(timer_t timerid, struct itimerspec *curr_value)
182 {
183 return __sysret(sys_timer_gettime(timerid, curr_value));
184 }
185
186 static __attribute__((unused))
sys_timer_settime(timer_t timerid,int flags,const struct itimerspec * new_value,struct itimerspec * old_value)187 int sys_timer_settime(timer_t timerid, int flags,
188 const struct itimerspec *new_value, struct itimerspec *old_value)
189 {
190 #if defined(__NR_timer_settime)
191 return my_syscall4(__NR_timer_settime, timerid, flags, new_value, old_value);
192 #elif defined(__NR_timer_settime64)
193 struct __kernel_itimerspec knew_value, kold_value;
194 int ret;
195
196 __nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value);
197 __nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval);
198 ret = my_syscall4(__NR_timer_settime64, timerid, flags, &knew_value, &kold_value);
199 if (old_value) {
200 __nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval);
201 __nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value);
202 }
203 return ret;
204 #else
205 return __nolibc_enosys(__func__, timerid, flags, new_value, old_value);
206 #endif
207 }
208
209 static __attribute__((unused))
timer_settime(timer_t timerid,int flags,const struct itimerspec * new_value,struct itimerspec * old_value)210 int timer_settime(timer_t timerid, int flags,
211 const struct itimerspec *new_value, struct itimerspec *old_value)
212 {
213 return __sysret(sys_timer_settime(timerid, flags, new_value, old_value));
214 }
215
216 #endif /* _NOLIBC_TIME_H */
217