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, 10 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/__rt_sigtimedwait.c b/libc/sysdeps/linux/common/__rt_sigtimedwait.c
index f4244148d..bd82ca6d5 100644
--- a/libc/sysdeps/linux/common/__rt_sigtimedwait.c
+++ b/libc/sysdeps/linux/common/__rt_sigtimedwait.c
@@ -52,8 +52,13 @@ int __NC(sigtimedwait)(const sigset_t *set, siginfo_t *info,
 	/* XXX The size argument hopefully will have to be changed to the
 	   real size of the user-level sigset_t.  */
 	/* on uClibc we use the kernel sigset_t size */
+# if defined(__UCLIBC_USE_TIME64__) && defined(__NR_rt_sigtimedwait_time64)
+	result = INLINE_SYSCALL(rt_sigtimedwait_time64, 4, set, info,
+				    timeout, __SYSCALL_SIGSET_T_SIZE);
+# else
 	result = INLINE_SYSCALL(rt_sigtimedwait, 4, set, info,
 				    timeout, __SYSCALL_SIGSET_T_SIZE);
+# endif
 
 	/* The kernel generates a SI_TKILL code in si_code in case tkill is
 	   used.  tkill is transparently used in raise().  Since having
@@ -65,9 +70,14 @@ int __NC(sigtimedwait)(const sigset_t *set, siginfo_t *info,
 	return result;
 # else
 	/* on uClibc we use the kernel sigset_t size */
+# if defined(__UCLIBC_USE_TIME64__) && defined(__NR_rt_sigtimedwait_time64)
+	return INLINE_SYSCALL(rt_sigtimedwait_time64, 4, set, info,
+			      timeout, __SYSCALL_SIGSET_T_SIZE);
+# else
 	return INLINE_SYSCALL(rt_sigtimedwait, 4, set, info,
 			      timeout, __SYSCALL_SIGSET_T_SIZE);
 # endif
+# endif
 }
 CANCELLABLE_SYSCALL(int, sigtimedwait,
 		    (const sigset_t *set, siginfo_t *info, const struct timespec *timeout),