linux(4): Implement timer_gettime64 syscall.

MFC after:		2 weeks

(cherry picked from commit 783c1bd8cb0cf02f2cfb95418b0a115ed975086a)

3 files changed, 58 insertions, 3 deletions

diff --git a/sys/compat/linux/linux_time.c b/sys/compat/linux/linux_time.c
index 739480342ad9..447319a7edc9 100644
--- a/sys/compat/linux/linux_time.c
+++ b/sys/compat/linux/linux_time.c
@@ -196,6 +196,30 @@ linux_to_native_itimerspec(struct itimerspec *ntp, struct l_itimerspec *ltp)
 	return (error);
 }
 
+#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
+int
+linux_to_native_itimerspec64(struct itimerspec *ntp, struct l_itimerspec64 *ltp)
+{
+	int error;
+
+	error = linux_to_native_timespec64(&ntp->it_interval, &ltp->it_interval);
+	if (error == 0)
+		error = linux_to_native_timespec64(&ntp->it_value, &ltp->it_value);
+	return (error);
+}
+
+int
+native_to_linux_itimerspec64(struct l_itimerspec64 *ltp, struct itimerspec *ntp)
+{
+	int error;
+
+	error = native_to_linux_timespec64(&ltp->it_interval, &ntp->it_interval);
+	if (error == 0)
+		error = native_to_linux_timespec64(&ltp->it_value, &ntp->it_value);
+	return (error);
+}
+#endif
+
 int
 linux_to_native_clockid(clockid_t *n, clockid_t l)
 {
diff --git a/sys/compat/linux/linux_timer.c b/sys/compat/linux/linux_timer.c
index 4e1b56d4b2e2..83c099fbc800 100644
--- a/sys/compat/linux/linux_timer.c
+++ b/sys/compat/linux/linux_timer.c
@@ -146,13 +146,30 @@ linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *uap)
 	int error;
 
 	error = kern_ktimer_gettime(td, uap->timerid, &val);
-	if (error == 0) {
-		ITS_CP(val, l_val);
+	if (error == 0)
+		error = native_to_linux_itimerspec(&l_val, &val);
+	if (error == 0)
 		error = copyout(&l_val, uap->setting, sizeof(l_val));
-	}
 	return (error);
 }
 
+#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
+int
+linux_timer_gettime64(struct thread *td, struct linux_timer_gettime64_args *uap)
+{
+	struct l_itimerspec64 l_val;
+	struct itimerspec val;
+	int error;
+
+	error = kern_ktimer_gettime(td, uap->timerid, &val);
+	if (error == 0)
+		error = native_to_linux_itimerspec64(&l_val, &val);
+	if (error == 0)
+		error = copyout(&l_val, uap->setting, sizeof(l_val));
+	return (error);
+}
+#endif
+
 int
 linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *uap)
 {
diff --git a/sys/compat/linux/linux_timer.h b/sys/compat/linux/linux_timer.h
index 6b5cf346049e..7617316b09c6 100644
--- a/sys/compat/linux/linux_timer.h
+++ b/sys/compat/linux/linux_timer.h
@@ -104,6 +104,13 @@ struct l_itimerspec {
 	struct l_timespec it_value;
 };
 
+#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
+struct l_itimerspec64 {
+	struct l_timespec64 it_interval;
+	struct l_timespec64 it_value;
+};
+#endif
+
 int native_to_linux_timespec(struct l_timespec *,
 				     struct timespec *);
 int linux_to_native_timespec(struct timespec *,
@@ -119,6 +126,13 @@ int native_to_linux_itimerspec(struct l_itimerspec *,
 				     struct itimerspec *);
 int linux_to_native_itimerspec(struct itimerspec *,
 				     struct l_itimerspec *);
+#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
+int native_to_linux_itimerspec64(struct l_itimerspec64 *,
+				     struct itimerspec *);
+int linux_to_native_itimerspec64(struct itimerspec *,
+				     struct l_itimerspec64 *);
+#endif
+
 int linux_to_native_timerflags(int *, int);
 
 #endif	/* _LINUX_TIMER_H */