1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ 2 /* 3 * timerfd definitions for NOLIBC 4 * Copyright (C) 2025 Thomas Weißschuh <thomas.weissschuh@linutronix.de> 5 */ 6 7 /* make sure to include all global symbols */ 8 #include "../nolibc.h" 9 10 #ifndef _NOLIBC_SYS_TIMERFD_H 11 #define _NOLIBC_SYS_TIMERFD_H 12 13 #include "../sys.h" 14 #include "../time.h" 15 16 #include <linux/timerfd.h> 17 18 19 static __attribute__((unused)) 20 int sys_timerfd_create(int clockid, int flags) 21 { 22 return my_syscall2(__NR_timerfd_create, clockid, flags); 23 } 24 25 static __attribute__((unused)) 26 int timerfd_create(int clockid, int flags) 27 { 28 return __sysret(sys_timerfd_create(clockid, flags)); 29 } 30 31 32 static __attribute__((unused)) 33 int sys_timerfd_gettime(int fd, struct itimerspec *curr_value) 34 { 35 #if defined(__NR_timerfd_gettime) 36 return my_syscall2(__NR_timerfd_gettime, fd, curr_value); 37 #else 38 struct __kernel_itimerspec kcurr_value; 39 int ret; 40 41 ret = my_syscall2(__NR_timerfd_gettime64, fd, &kcurr_value); 42 __nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval); 43 __nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value); 44 return ret; 45 #endif 46 } 47 48 static __attribute__((unused)) 49 int timerfd_gettime(int fd, struct itimerspec *curr_value) 50 { 51 return __sysret(sys_timerfd_gettime(fd, curr_value)); 52 } 53 54 55 static __attribute__((unused)) 56 int sys_timerfd_settime(int fd, int flags, 57 const struct itimerspec *new_value, struct itimerspec *old_value) 58 { 59 #if defined(__NR_timerfd_settime) 60 return my_syscall4(__NR_timerfd_settime, fd, flags, new_value, old_value); 61 #else 62 struct __kernel_itimerspec knew_value, kold_value; 63 int ret; 64 65 __nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value); 66 __nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval); 67 ret = my_syscall4(__NR_timerfd_settime64, fd, flags, &knew_value, &kold_value); 68 if (old_value) { 69 __nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval); 70 __nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value); 71 } 72 return ret; 73 #endif 74 } 75 76 static __attribute__((unused)) 77 int timerfd_settime(int fd, int flags, 78 const struct itimerspec *new_value, struct itimerspec *old_value) 79 { 80 return __sysret(sys_timerfd_settime(fd, flags, new_value, old_value)); 81 } 82 83 #endif /* _NOLIBC_SYS_TIMERFD_H */ 84