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, 5 insertions, 1 deletions

diff --git a/libpthread/nptl/pthread_condattr_setclock.c b/libpthread/nptl/pthread_condattr_setclock.c
index b2f4aaf29..e7f3539d6 100644
--- a/libpthread/nptl/pthread_condattr_setclock.c
+++ b/libpthread/nptl/pthread_condattr_setclock.c
@@ -35,7 +35,7 @@ pthread_condattr_setclock (
   if (clock_id == CLOCK_MONOTONIC)
     {
 #ifndef __ASSUME_POSIX_TIMERS
-# ifdef __NR_clock_getres
+# if defined(__NR_clock_getres) || defined(__NR_clock_getres_time64)
       /* Check whether the clock is available.  */
       static int avail;
 
@@ -45,7 +45,11 @@ pthread_condattr_setclock (
 
 	  INTERNAL_SYSCALL_DECL (err);
 	  int val;
+#if defined(__UCLIBC_USE_TIME64__) && defined(__NR_clock_getres_time64)
+	  val = INTERNAL_SYSCALL (clock_getres_time64, err, 2, CLOCK_MONOTONIC, &ts);
+#else
 	  val = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts);
+#endif
 	  avail = INTERNAL_SYSCALL_ERROR_P (val, err) ? -1 : 1;
 	}