Y2038: add function __clock_gettime64

* include/time.h: Declare __clock_gettime64().
* ntpl/pthread_clock_gettime.c: Add __pthread_clock_gettime64().
* ntpl/pthread_clock_gettime.c: Make __pthread_clock_gettime()
  a wrapper around __pthread_clock_gettime64().
* sysdeps/unix/clock_gettime.c (hp_timing_gettime): Use struct
  __timespec64.
* sysdeps/unix/clock_gettime.c (realtime_gettime): Likewise.
* sysdeps/unix/clock_gettime.c: Add __clock_gettime64().
* sysdeps/unix/clock_gettime.c: Make __clock_gettime() a
  wrapper around __clock_gettime64().
* sysdeps/unix/sysv/linux/clock_gettime.c: Add 64-bit-time syscall
  support.

4 files changed, 118 insertions, 14 deletions

diff --git a/include/time.h b/include/time.h
index f95f16e..a8372fa 100644
--- a/include/time.h
+++ b/include/time.h
@@ -40,6 +40,9 @@ extern __typeof (clock_settime) __clock_settime;
 extern __typeof (clock_nanosleep) __clock_nanosleep;
 extern __typeof (clock_getcpuclockid) __clock_getcpuclockid;
 
+extern int __clock_gettime64 (clockid_t __clock_id,
+			      struct __timespec64 *__tp) __THROW;
+
 /* Now define the internal interfaces.  */
 struct tm;
 
diff --git a/nptl/pthread_clock_gettime.c b/nptl/pthread_clock_gettime.c
index 6bc75cf..508821b 100644
--- a/nptl/pthread_clock_gettime.c
+++ b/nptl/pthread_clock_gettime.c
@@ -18,13 +18,14 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <time.h>
+#include <bits/types/struct_timespec64.h>
 #include "pthreadP.h"
 
 
 #if HP_TIMING_AVAIL
 int
-__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
-			 struct timespec *tp)
+__pthread_clock_gettime64 (clockid_t clock_id, hp_timing_t freq,
+			   struct __timespec64 *tp)
 {
   hp_timing_t tsc;
 
@@ -64,4 +65,36 @@ __pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
 
   return 0;
 }
+
+int
+__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
+			   struct timespec *tp)
+{
+  struct __timespec64 ts64;
+  int res;
+
+  if (tp == NULL)
+    {
+      __set_errno(EINVAL);
+      res = -1;
+    }
+  else
+    {
+      int res = __pthread_clock_gettime64 (clock_id, freq, &ts64);
+      if (res == 0)
+	{
+	  if (fits_in_time_t (ts64.tv_time))
+	    {
+	      tp->tv_sec = ts64.tv_sec;
+	      tp->tv_nsec = ts64.tv_nsec;
+	    }
+	  else
+	    {
+	      set_errno(EOVERFLOW);
+	      res = -1;
+	    }
+	}
+    }
+  return res;
+}
 #endif
diff --git a/sysdeps/unix/clock_gettime.c b/sysdeps/unix/clock_gettime.c
index 96df78a..88c1955 100644
--- a/sysdeps/unix/clock_gettime.c
+++ b/sysdeps/unix/clock_gettime.c
@@ -32,12 +32,12 @@ static hp_timing_t freq;
 
 
 /* This function is defined in the thread library.  */
-extern int __pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
-				    struct timespec *tp)
+extern int __pthread_clock_gettime64 (clockid_t clock_id, hp_timing_t freq,
+				      struct __timespec64 *tp)
      __attribute__ ((__weak__));
 
 static int
-hp_timing_gettime (clockid_t clock_id, struct timespec *tp)
+hp_timing_gettime (clockid_t clock_id, struct __timespec64 *tp)
 {
   hp_timing_t tsc;
 
@@ -55,7 +55,7 @@ hp_timing_gettime (clockid_t clock_id, struct timespec *tp)
 
   if (clock_id != CLOCK_PROCESS_CPUTIME_ID
       && __pthread_clock_gettime != NULL)
-    return __pthread_clock_gettime (clock_id, freq, tp);
+    return __pthread_clock_gettime64 (clock_id, freq, tp);
 
   /* Get the current counter.  */
   HP_TIMING_NOW (tsc);
@@ -76,20 +76,20 @@ hp_timing_gettime (clockid_t clock_id, struct timespec *tp)
 
 
 static inline int
-realtime_gettime (struct timespec *tp)
+realtime_gettime (struct __timespec64 *tp)
 {
   struct timeval tv;
   int retval = __gettimeofday (&tv, NULL);
   if (retval == 0)
     /* Convert into `timespec'.  */
-    TIMEVAL_TO_TIMESPEC (&tv, tp);
+    valid_timeval_to_timespec64 (&tv, tp);
   return retval;
 }
 
 
 /* Get current value of CLOCK and store it in TP.  */
 int
-__clock_gettime (clockid_t clock_id, struct timespec *tp)
+__clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp)
 {
   int retval = -1;
 
@@ -103,9 +103,9 @@ __clock_gettime (clockid_t clock_id, struct timespec *tp)
     case CLOCK_REALTIME:
       {
 	struct timeval tv;
-	retval = __gettimeofday (&tv, NULL);
+	retval = __gettimeofday (&tv32, NULL);
 	if (retval == 0)
-	  TIMEVAL_TO_TIMESPEC (&tv, tp);
+	  valid_timeval_to_timespec64 (&tv32, tp);
       }
       break;
 #endif
@@ -132,5 +132,36 @@ __clock_gettime (clockid_t clock_id, struct timespec *tp)
 
   return retval;
 }
+
+int
+__clock_gettime (clockid_t clock_id, struct timespec *tp)
+{
+  struct __timespec64 ts64;
+  int res;
+
+  if (tp == NULL)
+    {
+      __set_errno(EINVAL);
+      res = -1;
+    }
+  else
+    {
+      res = __clock_gettime64 (clock_id, &ts64);
+      if (res == 0)
+	{
+	  if (fits_in_time_t (ts64.tv_sec))
+	    {
+	      tp->tv_sec = ts64.tv_sec;
+	      tp->tv_nsec = ts64.tv_nsec;
+	    }
+	  else
+	    {
+	      __set_errno(EOVERFLOW);
+	      res = -1;
+	    }
+	}
+    }
+  return res;
+}
 weak_alias (__clock_gettime, clock_gettime)
 libc_hidden_def (__clock_gettime)
diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c
index d837fa3..9920ffa 100644
--- a/sysdeps/unix/sysv/linux/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/clock_gettime.c
@@ -25,6 +25,41 @@
 # define HAVE_VSYSCALL
 #endif
 #include <sysdep-vdso.h>
+#include <y2038-support.h>
+
+# define DO_CLOCK_GETTIME_32 \
+  retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, &ts32);		\
+  if (retval == 0)							\
+    {									\
+      valid_timespec_to_timespec64 (&ts32, tp);				\
+    }
+
+#ifdef __NR_clock_gettime64
+
+/* We are building with a 64-bit-time clock_gettime syscall */
+
+# define DO_CLOCK_GETTIME_64 \
+    if (__y2038_linux_support > 0)					\
+      {									\
+	retval = INLINE_SYSCALL (clock_gettime64, 2, clock_id, tp);	\
+	if (retval == -1 && errno == ENOSYS)				\
+	  {								\
+	    __y2038_linux_support = -1;					\
+	    DO_CLOCK_GETTIME_32;					\
+	  }								\
+      }									\
+    else								\
+      {									\
+        DO_CLOCK_GETTIME_32;						\
+      }
+
+#else
+
+/* We are building without a 64-bit-time clock_gettime syscall */
+
+# define DO_CLOCK_GETTIME_64 DO_CLOCK_GETTIME_32
+
+#endif
 
 /* The REALTIME and MONOTONIC clock are definitely supported in the
    kernel.  */
@@ -32,7 +67,7 @@
   SYSDEP_GETTIME_CPUTIME;						      \
   case CLOCK_REALTIME:							      \
   case CLOCK_MONOTONIC:							      \
-    retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp);		      \
+    DO_CLOCK_GETTIME_64;						      \
     break
 
 /* We handled the REALTIME clock here.  */
@@ -40,8 +75,10 @@
 #define HANDLED_CPUTIME	1
 
 #define SYSDEP_GETTIME_CPU(clock_id, tp) \
-  retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
+  DO_CLOCK_GETTIME_64; \
   break
-#define SYSDEP_GETTIME_CPUTIME	/* Default catches them too.  */
+
+#define SYSDEP_GETTIME_CPUTIME \
+  struct timespec ts32
 
 #include <sysdeps/unix/clock_gettime.c>