Adding a new syscall clock_settime64 specific for timespec64, It can solve y2038 in below scenarios:
1, 64bit kernel, y2038 safe 2, 32bit kernel, 32bit time_t, go to clock_settime, no break, y2038 not safe. 3, 32bit kernel, 64bit time_t, go to clock_settime64 by the help of libcobalt, no break, y2038 safe. Signed-off-by: chensong <[email protected]> --- include/cobalt/uapi/syscall.h | 1 + kernel/cobalt/posix/clock.c | 12 ++++++++++++ kernel/cobalt/posix/clock.h | 4 ++++ 3 files changed, 17 insertions(+) diff --git a/include/cobalt/uapi/syscall.h b/include/cobalt/uapi/syscall.h index 8895d2b..291b550 100644 --- a/include/cobalt/uapi/syscall.h +++ b/include/cobalt/uapi/syscall.h @@ -123,6 +123,7 @@ #define sc_cobalt_clock_adjtime 100 #define sc_cobalt_thread_setschedprio 101 #define sc_cobalt_sem_timedwait64 102 +#define sc_cobalt_clock_settime64 103 #define __NR_COBALT_SYSCALLS 128 /* Power of 2 */ diff --git a/kernel/cobalt/posix/clock.c b/kernel/cobalt/posix/clock.c index 6a47956..9643f8f 100644 --- a/kernel/cobalt/posix/clock.c +++ b/kernel/cobalt/posix/clock.c @@ -23,6 +23,7 @@ #include "thread.h" #include "clock.h" #include <trace/events/cobalt-posix.h> +#include <cobalt/kernel/time.h> static struct xnclock *external_clocks[COBALT_MAX_EXTCLOCKS]; @@ -193,6 +194,17 @@ COBALT_SYSCALL(clock_settime, current, return __cobalt_clock_settime(clock_id, &ts); } +COBALT_SYSCALL(clock_settime64, current, + (clockid_t clock_id, const struct __kernel_timespec __user *u_ts)) +{ + struct timespec64 ts64; + + if (cobalt_get_timespec64(&ts64, u_ts)) + return -EFAULT; + + return __cobalt_clock_settime(clock_id, &ts64); +} + COBALT_SYSCALL(clock_adjtime, current, (clockid_t clock_id, struct __user_old_timex __user *u_tx)) { diff --git a/kernel/cobalt/posix/clock.h b/kernel/cobalt/posix/clock.h index e69e76e..90f79fa 100644 --- a/kernel/cobalt/posix/clock.h +++ b/kernel/cobalt/posix/clock.h @@ -119,6 +119,10 @@ COBALT_SYSCALL_DECL(clock_gettime, COBALT_SYSCALL_DECL(clock_settime, (clockid_t clock_id, const struct __user_old_timespec __user *u_ts)); +COBALT_SYSCALL_DECL(clock_settime64, + (clockid_t clock_id, + const struct __kernel_timespec __user *u_ts)); + COBALT_SYSCALL_DECL(clock_adjtime, (clockid_t clock_id, struct __user_old_timex __user *u_tx)); -- 2.7.4
