Introduce time64 support.

This patch introduces *time64 syscalls support for uClibc-ng.
Currently the redirection of syscalls to their *time64
analogs is fully supported for 32bit ARM (ARMv5, ARMv6, ARMv7).
The main changes that take effect when time64 feature is enabled are:
- sizeof(time_t) is 8.
- There is a possibility os setting date beyond year 2038.
- some syscalls are redirected:
clock_adjtime -> clock_adjtime64
clock_getres -> clock_getres_time64
clock_gettime -> clock_gettime64
clock_nanosleep -> clock_nanosleep_time64
clock_settime -> clock_settime64
futex -> futex_time64
mq_timedreceive -> mq_timedreceive_time64
mq_timedsend -> mq_timedsend_time64
ppoll -> ppoll_time64
pselect6 -> pselect6_time64
recvmmsg -> recvmmsg_time64
rt_sigtimedwait -> rt_sigtimedwait_time64
sched_rr_get_interval -> sched_rr_get_interval_time64
semtimedop -> semtimedop_time64
timer_gettime -> timer_gettime64
timer_settime -> timer_settime64
timerfd_gettime -> timerfd_gettime64
timerfd_settime -> timerfd_settime64
utimensat -> utimensat_time64.

- settimeofday uses clock_settime (like in glibc/musl).
- gettimeofday uses clock_gettime (like in glibc/musl).
- nanosleep uses clock_nanosleep (like in glibc/musl).

- There are some fixes in data structures used by libc and kernel
for correct data handling both with and without enabled time64 support.

Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/setitimer.c b/libc/sysdeps/linux/common/setitimer.c
index 2febabbc8..eab541329 100644
--- a/libc/sysdeps/linux/common/setitimer.c
+++ b/libc/sysdeps/linux/common/setitimer.c
@@ -10,6 +10,38 @@
 #include <sys/time.h>
 
 
+#if defined(__UCLIBC_USE_TIME64__)
+
+struct itimerval32_struct {
+	__S32_TYPE __interval_sec;
+	__S32_TYPE __interval_usec;
+	__S32_TYPE __value_sec;
+	__S32_TYPE __value_usec;
+};
+
+int setitimer(__itimer_which_t which, const struct itimerval *restrict new, struct itimerval *restrict old)
+{
+	struct itimerval32_struct __itv32 = {
+		.__interval_sec = new->it_interval.tv_sec,
+		.__interval_usec = new->it_interval.tv_usec,
+		.__value_sec = new->it_value.tv_sec,
+		.__value_usec = new->it_value.tv_usec
+	};
+	struct itimerval32_struct __itv32_old;
+
+	int __ret = INLINE_SYSCALL(setitimer, 3, which, &__itv32, &__itv32_old);
+	if (__ret == 0 && old) {
+		old->it_interval.tv_sec = __itv32_old.__interval_sec;
+		old->it_interval.tv_usec = __itv32_old.__interval_usec;
+		old->it_value.tv_sec = __itv32_old.__value_sec;
+		old->it_value.tv_usec = __itv32_old.__value_usec;
+	}
+
+	return __ret;
+}
+#else
 _syscall3(int, setitimer, __itimer_which_t, which,
 		  const struct itimerval *, new, struct itimerval *, old)
+
+#endif
 libc_hidden_def(setitimer)