tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
21static __inline__
22void __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
28static __inline__
29void __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
43static __attribute__((unused))
44int 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
59static __attribute__((unused))
60int clock_getres(clockid_t clockid, struct timespec *res)
61{
62 return __sysret(sys_clock_getres(clockid, res));
63}
64
65static __attribute__((unused))
66int 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
81static __attribute__((unused))
82int clock_gettime(clockid_t clockid, struct timespec *tp)
83{
84 return __sysret(sys_clock_gettime(clockid, tp));
85}
86
87static __attribute__((unused))
88int 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
102static __attribute__((unused))
103int clock_settime(clockid_t clockid, struct timespec *tp)
104{
105 return __sysret(sys_clock_settime(clockid, tp));
106}
107
108static __attribute__((unused))
109int 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
128static __attribute__((unused))
129int 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
136static __inline__
137double difftime(time_t time1, time_t time2)
138{
139 return time1 - time2;
140}
141
142static __inline__
143int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
144{
145 return __sysret(sys_clock_nanosleep(CLOCK_REALTIME, 0, rqtp, rmtp));
146}
147
148
149static __attribute__((unused))
150time_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
169static __attribute__((unused))
170int 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
175static __attribute__((unused))
176int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
177{
178 return __sysret(sys_timer_create(clockid, evp, timerid));
179}
180
181static __attribute__((unused))
182int sys_timer_delete(timer_t timerid)
183{
184 return my_syscall1(__NR_timer_delete, timerid);
185}
186
187static __attribute__((unused))
188int timer_delete(timer_t timerid)
189{
190 return __sysret(sys_timer_delete(timerid));
191}
192
193static __attribute__((unused))
194int 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
211static __attribute__((unused))
212int timer_gettime(timer_t timerid, struct itimerspec *curr_value)
213{
214 return __sysret(sys_timer_gettime(timerid, curr_value));
215}
216
217static __attribute__((unused))
218int 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
240static __attribute__((unused))
241int 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 */