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, 9 insertions, 2 deletions

diff --git a/libc/sysdeps/linux/common/gettimeofday.c b/libc/sysdeps/linux/common/gettimeofday.c
index d9cf3bb84..ed18b2be5 100755
--- a/libc/sysdeps/linux/common/gettimeofday.c
+++ b/libc/sysdeps/linux/common/gettimeofday.c
@@ -8,12 +8,12 @@
 
 #include <sys/syscall.h>
 #include <sys/time.h>
+#include <time.h>
 
 #ifdef __VDSO_SUPPORT__
 #include "ldso.h"
 #endif
 
-
 #ifdef __VDSO_SUPPORT__
 typedef int (*gettimeofday_func)(struct timeval * tv, __timezone_ptr_t tz);
 #endif
@@ -29,7 +29,14 @@ int gettimeofday(struct timeval * tv, __timezone_ptr_t tz) {
             _syscall2_body(int, gettimeofday, struct timeval *, tv, __timezone_ptr_t, tz)
         }
     #else
-        _syscall2_body(int, gettimeofday, struct timeval *, tv, __timezone_ptr_t, tz)
+        if (!tv)
+            return 0;
+
+        struct timespec __ts;
+        int __ret = clock_gettime(CLOCK_REALTIME, &__ts);
+        tv->tv_sec = __ts.tv_sec;
+        tv->tv_usec = (suseconds_t)__ts.tv_nsec / 1000;
+        return __ret;
     #endif
 }