Y2038: add _TIME_BITS support

This makes all previously defined Y2038-proof API types, functions and
implementations the default when _TIME_BITS==64 and __WORDSIZE==32 (so
that 64-bit architectures are unaffected).

Note: it is assumed that the API is consistent, i.e. for each API type
which is enabled here, all API functions which depend on this type are
enabled and mapped to Y2038-proof implementations.

bits/resource.h

@@ -134,6 +134,7 @@ enum __rusage_who
   };
 
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 #include <bits/types/struct_rusage.h>
 
 /* Priority limits.  */

bits/time64.h

@@ -0,0 +1,36 @@
+/* bits/time64.h -- underlying types for __time64_t.  Generic version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_TYPES_H
+# error "Never include <bits/time64.h> directly; use <sys/types.h> instead."
+#endif
+
+#ifndef	_BITS_TIME64_H
+#define	_BITS_TIME64_H	1
+
+/* Define __TIME64_T_TYPE so that it is always a 64-bit type.  */
+
+#if __TIMESIZE == 64
+/* If we already have 64-bit time type then use it.  */
+# define __TIME64_T_TYPE		__TIME_T_TYPE
+#else
+/* Define a 64-bit time type alongsize the 32-bit one.  */
+# define __TIME64_T_TYPE		__SQUAD_TYPE
+#endif
+
+#endif /* bits/time64.h */

include/bits/types/struct___timespec64.h

@@ -0,0 +1,36 @@
+#ifndef __timespec64_defined
+#define __timespec64_defined 1
+
+#include <bits/types.h>
+#include <bits/timesize.h>
+#include <endian.h>
+
+/* The glibc-internal Y2038-proof structure for a time value.
+   To keep things Posix-ish, we keep the nanoseconds field a 32-bit
+   signed long, but since the Linux field is a 64-bit signed int, we
+   pad our tv_nsec with a 32-bit int, which should always be 0.
+   Note that this is the glibc-internal type; in the public type, the
+   padding is an anonymous 32-bit bitfield, so that source-code initializers
+   keep working.  */
+#if __TIMESIZE==64
+# define __timespec64 timespec
+#else
+#define TIMSPEC64_TV_PAD_DEFINED
+# if BYTE_ORDER == BIG_ENDIAN
+struct __timespec64
+{
+  __time64_t tv_sec;		/* Seconds */
+  int tv_pad: 32;		/* Padding named for checking/setting */
+  __syscall_slong_t tv_nsec;	/* Nanoseconds */
+};
+# else
+struct __timespec64
+{
+  __time64_t tv_sec;		/* Seconds */
+  __syscall_slong_t tv_nsec;	/* Nanoseconds */
+  int tv_pad: 32;		/* Padding named for checking/setting */
+};
+# endif
+#endif
+
+#endif

include/bits/types/struct_itimerspec64.h

@@ -0,0 +1 @@
+#include <time/bits/types/struct_itimerspec64.h>

include/bits/types/struct_timeval64.h

@@ -0,0 +1 @@
+#include <time/bits/types/struct_timeval64.h>

include/features.h

@@ -364,6 +364,25 @@
 # define __USE_FILE_OFFSET64	1
 #endif
 
+/* we need to know the word size in order to check the time size */
+#include <bits/wordsize.h>
+
+#if defined _TIME_BITS
+# if _TIME_BITS == 64
+#  if ! defined(_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64
+#   error _TIME_BIT==64 is allowed only when _FILE_OFFSET_BITS==64
+#  elif __WORDSIZE == 32
+#   define __USE_TIME_BITS64	1
+#  endif
+# elif __TIME_BITS == 32
+#  if __WORDSIZE > 32
+#   error __TIME_BITS=32 is not compatible with __WORDSIZE > 32
+#  endif
+# else
+#  error Invalid _TIME_BITS value (can only be 32 or 64)
+# endif
+#endif
+
 #if defined _DEFAULT_SOURCE
 # define __USE_MISC	1
 #endif

include/sys/select.h

@@ -3,6 +3,7 @@
 
 #ifndef _ISOMAC
 /* Now define the internal interfaces.  */
+
 extern int __pselect (int __nfds, fd_set *__readfds,
 		      fd_set *__writefds, fd_set *__exceptfds,
 		      const struct timespec *__timeout,
@@ -14,5 +15,17 @@ extern int __select (int __nfds, fd_set *__restrict __readfds,
 		     struct timeval *__restrict __timeout);
 libc_hidden_proto (__select)
 
+/* 64-bit time version */
+
+extern int __pselect64 (int __nfds, fd_set *__readfds,
+			fd_set *__writefds, fd_set *__exceptfds,
+			const struct __timespec64 *__timeout,
+			const __sigset_t *__sigmask);
+
+extern int __select64 (int __nfds, fd_set *__restrict __readfds,
+		       fd_set *__restrict __writefds,
+		       fd_set *__restrict __exceptfds,
+		       struct __timeval64 *__restrict __timeout);
+
 #endif
 #endif

include/sys/stat.h

@@ -2,6 +2,28 @@
 #include <io/sys/stat.h>
 
 #ifndef _ISOMAC
+
+/* Used for 64-bit time implementations */
+struct __stat64_t64
+  {
+    __dev_t st_dev;			/* Device.  */
+
+    __ino_t __st_ino;			/* 32bit file serial number.	*/
+    __mode_t st_mode;			/* File mode.  */
+    __nlink_t st_nlink;			/* Link count.  */
+    __uid_t st_uid;			/* User ID of the file's owner.	*/
+    __gid_t st_gid;			/* Group ID of the file's group.*/
+    __dev_t st_rdev;			/* Device number, if device.  */
+    __off64_t st_size;			/* Size of file, in bytes.  */
+    __blksize_t st_blksize;		/* Optimal block size for I/O.  */
+
+    __blkcnt64_t st_blocks;		/* Number 512-byte blocks allocated. */
+    struct __timespec64 st_atim;		/* Time of last access.  */
+    struct __timespec64 st_mtim;		/* Time of last modification.  */
+    struct __timespec64 st_ctim;		/* Time of last status change.  */
+    __ino64_t st_ino;			/* File serial number.		*/
+  };
+
 /* Now define the internal interfaces. */
 extern int __stat (const char *__file, struct stat *__buf);
 extern int __fstat (int __fd, struct stat *__buf);
@@ -14,6 +36,17 @@ extern int __mkdir (const char *__path, __mode_t __mode);
 libc_hidden_proto (__mkdir)
 extern int __mknod (const char *__path,
 		    __mode_t __mode, __dev_t __dev);
+extern int __fxstat64_time64 (int __ver, int __fildes,
+			      struct __stat64_t64 *__stat_buf);
+extern int __xstat64_time64 (int __ver, const char *__filename,
+			     struct __stat64_t64 *__stat_buf);
+extern int __lxstat64_time64 (int __ver, const char *__filename,
+			      struct __stat64_t64 *__stat_buf);
+extern int __fxstatat64_time64 (int __ver, int __fildes,
+				const char *__filename,
+				struct __stat64_t64 *__stat_buf,
+				int __flag);
+
 #if IS_IN (libc) || (IS_IN (rtld) && !defined NO_RTLD_HIDDEN)
 hidden_proto (__fxstat)
 hidden_proto (__fxstat64)

include/sys/time.h

@@ -24,9 +24,13 @@ extern int __gettimeofday (struct timeval *__tv,
 			   struct timezone *__tz);
 libc_hidden_proto (__gettimeofday)
 libc_hidden_proto (gettimeofday)
+extern int __gettimeofday64 (struct __timeval64 *__tv,
+			     struct timezone *__tz);
 extern int __settimeofday (const struct timeval *__tv,
 			   const struct timezone *__tz)
 	attribute_hidden;
+extern int __settimeofday64 (const struct __timeval64 *__tv,
+			     const struct timezone *__tz);
 extern int __adjtime (const struct timeval *__delta,
 		      struct timeval *__olddelta);
 extern int __getitimer (enum __itimer_which __which,

include/time.h

@@ -3,6 +3,9 @@
 
 #ifndef _ISOMAC
 # include <bits/types/locale_t.h>
+# include <bits/types/struct___timespec64.h>
+# include <bits/types/struct___timeval64.h>
+# include <stdbool.h>
 
 extern __typeof (strftime_l) __strftime_l;
 libc_hidden_proto (__strftime_l)
@@ -16,6 +19,51 @@ libc_hidden_proto (localtime)
 libc_hidden_proto (strftime)
 libc_hidden_proto (strptime)
 
+#if __TIMESIZE == 64
+# define __timegm64 timegm
+# define __mktime64 mktime
+# define __timelocal64 timelocal
+#else
+extern __time64_t __timegm64 (struct tm *__tp) __THROW;
+extern __time64_t __mktime64 (struct tm *__tp) __THROW;
+/* Another name for `__mktime64'.  */
+extern __time64_t __timelocal64 (struct tm *__tp) __THROW;
+
+libc_hidden_proto (__mktime64)
+libc_hidden_proto (__timelocal64)
+#endif
+
+/* 64-bit time version of the current struct timex */
+struct __timex64
+{
+  unsigned int modes;		/* mode selector */
+  __syscall_slong_t offset;	/* time offset (usec) */
+  __syscall_slong_t freq;	/* frequency offset (scaled ppm) */
+  __syscall_slong_t maxerror;	/* maximum error (usec) */
+  __syscall_slong_t esterror;	/* estimated error (usec) */
+  int status;			/* clock command/status */
+  __syscall_slong_t constant;	/* pll time constant */
+  __syscall_slong_t precision;	/* clock precision (usec) (ro) */
+  __syscall_slong_t tolerance;	/* clock frequency tolerance (ppm) (ro) */
+  struct __timeval64 time;	/* (read only, except for ADJ_SETOFFSET) */
+  __syscall_slong_t tick;	/* (modified) usecs between clock ticks */
+  __syscall_slong_t ppsfreq;	/* pps frequency (scaled ppm) (ro) */
+  __syscall_slong_t jitter;	/* pps jitter (us) (ro) */
+  int shift;			/* interval duration (s) (shift) (ro) */
+  __syscall_slong_t stabil;	/* pps stability (scaled ppm) (ro) */
+  __syscall_slong_t jitcnt;	/* jitter limit exceeded (ro) */
+  __syscall_slong_t calcnt;	/* calibration intervals (ro) */
+  __syscall_slong_t errcnt;	/* calibration errors (ro) */
+  __syscall_slong_t stbcnt;	/* stability limit exceeded (ro) */
+
+  int tai;			/* TAI offset (ro) */
+
+  /* ??? */
+  int  :32; int  :32; int  :32; int  :32;
+  int  :32; int  :32; int  :32; int  :32;
+  int  :32; int  :32; int  :32;
+};
+
 extern __typeof (clock_getres) __clock_getres;
 extern __typeof (clock_gettime) __clock_gettime;
 libc_hidden_proto (__clock_gettime)
@@ -23,13 +71,22 @@ 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;
+extern int __clock_settime64 (clockid_t __clock_id,
+			       const struct __timespec64 *__tp) __THROW;
+extern int __clock_getres_time64 (clockid_t __clock_id,
+				  struct __timespec64 *__res) __THROW;
+extern int __clock_nanosleep64 (clockid_t __clock_id, int __flags,
+				const struct __timespec64 *__req,
+				struct __timespec64 *__rem);
+
+extern int __utimes64 (const char *file,
+                       const struct __timeval64 tvp[2]);
+
 /* Now define the internal interfaces.  */
 struct tm;
 
-/* time_t variant for representing time zone data, independent of
-   time_t.  */
-typedef __int64_t internal_time_t;
-
 /* Defined in mktime.c.  */
 extern const unsigned short int __mon_yday[2][13] attribute_hidden;
 
@@ -43,35 +100,69 @@ extern int __use_tzfile attribute_hidden;
 
 extern void __tzfile_read (const char *file, size_t extra,
 			   char **extrap) attribute_hidden;
-extern void __tzfile_compute (internal_time_t timer, int use_localtime,
+extern void __tzfile_compute (__time64_t timer, int use_localtime,
 			      long int *leap_correct, int *leap_hit,
 			      struct tm *tp) attribute_hidden;
 extern void __tzfile_default (const char *std, const char *dst,
 			      long int stdoff, long int dstoff)
   attribute_hidden;
 extern void __tzset_parse_tz (const char *tz) attribute_hidden;
-extern void __tz_compute (time_t timer, struct tm *tm, int use_localtime)
+extern void __tz_compute (__time64_t timer, struct tm *tm, int use_localtime)
   __THROW attribute_hidden;
 
-/* Subroutine of `mktime'.  Return the `time_t' representation of TP and
-   normalize TP, given that a `struct tm *' maps to a `time_t' as performed
+/* Subroutine of mktime.  Return the __time64_t representation of TP and
+   normalize TP, given that a struct tm * maps to a __time64_t as performed
    by FUNC.  Record next guess for localtime-gmtime offset in *OFFSET.  */
-extern time_t __mktime_internal (struct tm *__tp,
-				 struct tm *(*__func) (const time_t *,
-						       struct tm *),
-				 long int *__offset) attribute_hidden;
+extern __time64_t __mktime_internal (struct tm *__tp,
+				     struct tm *(*__func) (const __time64_t *,
+							   struct tm *),
+				     long int *__offset) attribute_hidden;
+
+/* nis/nis_print.c needs ctime, so even if ctime is not declared here,
+   we define __ctime64 as ctime so that nis/nis_print.c can get linked
+   against a function called ctime. */
+#if __TIMESIZE == 64
+# define __ctime64 ctime
+#endif
+
+#if __TIMESIZE == 64
+# define __ctime64_r ctime_r
+#endif
+
+#if __TIMESIZE == 64
+# define __localtime64 localtime
+#else
+extern struct tm *__localtime64 (const __time64_t *__timer);
+libc_hidden_proto (__localtime64)
+#endif
+
 extern struct tm *__localtime_r (const time_t *__timer,
 				 struct tm *__tp) attribute_hidden;
 
+#if __TIMESIZE == 64
+# define __localtime64_r __localtime_r
+#else
+extern struct tm *__localtime64_r (const __time64_t *__timer,
+				   struct tm *__tp) attribute_hidden;
+#endif
+
 extern struct tm *__gmtime_r (const time_t *__restrict __timer,
 			      struct tm *__restrict __tp);
 libc_hidden_proto (__gmtime_r)
 
-/* Compute the `struct tm' representation of *T,
+#if __TIMESIZE == 64
+# define __gmtime64 gmtime
+# define __gmtime64_r __gmtime_r
+#else
+extern struct tm *__gmtime64_r (const __time64_t *__restrict __timer,
+			        struct tm *__restrict __tp);
+#endif
+
+/* Compute the `struct tm' representation of T,
    offset OFFSET seconds east of UTC,
    and store year, yday, mon, mday, wday, hour, min, sec into *TP.
    Return nonzero if successful.  */
-extern int __offtime (const time_t *__timer,
+extern int __offtime (__time64_t __timer,
 		      long int __offset,
 		      struct tm *__tp) attribute_hidden;
 
@@ -80,8 +171,8 @@ extern char *__asctime_r (const struct tm *__tp, char *__buf)
 extern void __tzset (void) attribute_hidden;
 
 /* Prototype for the internal function to get information based on TZ.  */
-extern struct tm *__tz_convert (const time_t *timer, int use_localtime,
-				struct tm *tp) attribute_hidden;
+extern struct tm *__tz_convert (__time64_t timer, int use_localtime,
+			        struct tm *tp) attribute_hidden;
 
 extern int __nanosleep (const struct timespec *__requested_time,
 			struct timespec *__remaining);
@@ -99,6 +190,12 @@ extern char * __strptime_internal (const char *rp, const char *fmt,
 				   struct tm *tm, void *statep,
 				   locale_t locparam) attribute_hidden;
 
+#if __TIMESIZE == 64
+# define __difftime64 __difftime
+#else
+extern double __difftime64 (__time64_t time1, __time64_t time0);
+#endif
+
 extern double __difftime (time_t time1, time_t time0);
 
 
@@ -106,5 +203,98 @@ extern double __difftime (time_t time1, time_t time0);
    actual clock ID.  */
 #define CLOCK_IDFIELD_SIZE	3
 
+/* Check whether a time64_t value fits in a time_t.  */
+static inline bool
+fits_in_time_t (__time64_t t64)
+{
+  time_t t = t64;
+  return t == t64;
+}
+
+/* Convert a known valid struct timeval into a struct __timespec64.  */
+static inline void
+valid_timeval_to_timespec64 (const struct timeval *tv32,
+			     struct __timespec64 *ts64)
+{
+  ts64->tv_sec = tv32->tv_sec;
+  ts64->tv_nsec = tv32->tv_usec * 1000;
+}
+
+/* Convert a known valid struct timespec into a struct __timespec64.  */
+static inline void
+valid_timespec_to_timespec64 (const struct timespec *ts32,
+			      struct __timespec64 *ts64)
+{
+  ts64->tv_sec = ts32->tv_sec;
+  ts64->tv_nsec = ts32->tv_nsec;
+  /* We only need to zero ts64->tv_pad if we pass it to the kernel.  */
+}
+
+/* Convert a known valid struct __timespec64 into a struct timespec.  */
+static inline void
+valid_timespec64_to_timespec (const struct __timespec64 *ts64,
+			      struct timespec *ts32)
+{
+  ts32->tv_sec = (time_t) ts64->tv_sec;
+  ts32->tv_nsec = ts64->tv_nsec;
+}
+
+/* Convert a known valid struct __timespec64 into a struct timeval.  */
+static inline void
+valid_timespec64_to_timeval (const struct __timespec64 *ts64,
+			     struct timeval *tv32)
+{
+  tv32->tv_sec = (time_t) ts64->tv_sec;
+  tv32->tv_usec = ts64->tv_nsec / 1000;
+}
+
+/* Check if a value lies with the valid nanoseconds range.  */
+#define IS_VALID_NANOSECONDS(ns) (ns >= 0 && ns <= 999999999)
+
+/* Check and convert a struct timespec into a struct __timespec64.  */
+static inline bool
+timespec_to_timespec64 (const struct timespec *ts32,
+					   struct __timespec64 *ts64)
+{
+  /* Check that ts32 holds a valid count of nanoseconds.  */
+  if (! IS_VALID_NANOSECONDS (ts32->tv_nsec))
+    return false;
+  /* All ts32 fields can fit in ts64, so copy them.  */
+  valid_timespec_to_timespec64 (ts32, ts64);
+  /* We only need to zero ts64->tv_pad if we pass it to the kernel.  */
+  return true;
+}
+
+/* Check and convert a struct __timespec64 into a struct timespec.  */
+static inline bool
+timespec64_to_timespec (const struct __timespec64 *ts64,
+					   struct timespec *ts32)
+{
+  /* Check that tv_nsec holds a valid count of nanoseconds.  */
+  if (! IS_VALID_NANOSECONDS (ts64->tv_nsec))
+    return false;
+  /* Check that tv_sec can fit in a __time_t.  */
+  if (! fits_in_time_t (ts64->tv_sec))
+    return false;
+  /* All ts64 fields can fit in ts32, so copy them.  */
+  valid_timespec64_to_timespec (ts64, ts32);
+  return true;
+}
+
+/* Check and convert a struct __timespec64 into a struct timeval.  */
+static inline bool
+timespec64_to_timeval (const struct __timespec64 *ts64,
+					  struct timeval *tv32)
+{
+  /* Check that tv_nsec holds a valid count of nanoseconds.  */
+  if (! IS_VALID_NANOSECONDS (ts64->tv_nsec))
+    return false;
+  /* Check that tv_sec can fit in a __time_t.  */
+  if (! fits_in_time_t (ts64->tv_sec))
+    return false;
+  /* All ts64 fields can fit in tv32, so copy them.  */
+  valid_timespec64_to_timeval (ts64, tv32);
+  return true;
+}
 #endif
 #endif

include/utime.h

@@ -6,4 +6,11 @@
 libc_hidden_proto (utime)
 #endif
 
+/* Structure describing file times, 64-bit time version.  */
+struct __utimbuf64
+  {
+    __time64_t actime;		/* Access time.  */
+    __time64_t modtime;		/* Modification time.  */
+  };
+
 #endif /* utime.h */

io/Makefile

@@ -28,7 +28,7 @@ headers := sys/stat.h bits/stat.h sys/statfs.h bits/statfs.h sys/vfs.h \
 	   bits/statx.h utime.h ftw.h fts.h sys/sendfile.h
 
 routines :=								\
-	utime								\
+	utime utime64							\
 	mkfifo mkfifoat							\
 	stat fstat lstat stat64 fstat64 lstat64 fstatat fstatat64	\
 	xstat fxstat lxstat xstat64 fxstat64 lxstat64 statx		\

io/Versions

@@ -132,6 +132,13 @@ libc {
     fcntl64;
     statx;
   }
+  GLIBC_2.29 {
+    __fxstat64_time64;
+    __xstat64_time64;
+    __lxstat64_time64;
+    __fxstatat64_time64;
+    __utime64;
+  }
   GLIBC_PRIVATE {
     __libc_fcntl64;
     __fcntl_nocancel;

io/fstat64.c

@@ -50,3 +50,10 @@ fstat64 (int fd, struct stat64 *buf)
 {
   return __fxstat64 (_STAT_VER, fd, buf);
 }
+
+int
+attribute_hidden
+__fstat64_time64 (int fd, struct __stat64_t64 *buf)
+{
+  return __fxstat64_time64 (_STAT_VER, fd, buf);
+}

io/fstatat64.c

@@ -50,3 +50,10 @@ fstatat64 (int fd, const char *file, struct stat64 *buf, int flag)
 {
   return __fxstatat64 (_STAT_VER, fd, file, buf, flag);
 }
+
+int
+attribute_hidden
+__fstatat64_time64 (int fd, const char *file, struct __stat64_t64 *buf, int flag)
+{
+  return __fxstatat64_time64 (_STAT_VER, fd, file, buf, flag);
+}

io/futimens.c

@@ -32,3 +32,11 @@ futimens (int fd, const struct timespec tsp[2])
   return -1;
 }
 stub_warning (futimens)
+
+int
+__futimens64 (int fd, const struct __timespec64 tsp[2])
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__futimens64)

io/lstat64.c

@@ -50,3 +50,10 @@ lstat64 (const char *file, struct stat64 *buf)
 {
   return __lxstat64 (_STAT_VER, file, buf);
 }
+
+int
+attribute_hidden
+__lstat64_time64 (const char *file, struct __stat64_t64 *buf)
+{
+  return __lxstat64_time64 (_STAT_VER, file, buf);
+}

io/stat64.c

@@ -50,3 +50,10 @@ stat64 (const char *file, struct stat64 *buf)
 {
   return __xstat64 (_STAT_VER, file, buf);
 }
+
+int
+attribute_hidden
+__stat64_time64 (const char *file, struct __stat64_t64 *buf)
+{
+  return __xstat64_time64 (_STAT_VER, file, buf);
+}

io/sys/stat.h

@@ -210,14 +210,27 @@ extern int stat (const char *__restrict __file,
 extern int fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2));
 #else
 # ifdef __REDIRECT_NTH
+#  ifdef __USE_TIME_BITS64
+extern int __REDIRECT_NTH (stat, (const char *__restrict __file,
+				  struct stat *__restrict __buf), __stat64_time64)
+     __nonnull ((1, 2));
+extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), __fstat64_time64)
+     __nonnull ((2));
+#  else
 extern int __REDIRECT_NTH (stat, (const char *__restrict __file,
 				  struct stat *__restrict __buf), stat64)
      __nonnull ((1, 2));
 extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), fstat64)
      __nonnull ((2));
+#  endif
 # else
-#  define stat stat64
-#  define fstat fstat64
+#  ifdef __USE_TIME_BITS64
+#   define stat stat64_time64
+#   define fstat fstat64_time64
+#  else
+#   define stat stat64
+#   define fstat fstat64
+#  endif
 # endif
 #endif
 #ifdef __USE_LARGEFILE64
@@ -260,12 +273,23 @@ extern int lstat (const char *__restrict __file,
 		  struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
 # else
 #  ifdef __REDIRECT_NTH
+#   ifdef __USE_TIME_BITS64
+extern int __REDIRECT_NTH (lstat,
+			   (const char *__restrict __file,
+			    struct stat *__restrict __buf), __lstat64_time64)
+     __nonnull ((1, 2));
+#   else
 extern int __REDIRECT_NTH (lstat,
 			   (const char *__restrict __file,
 			    struct stat *__restrict __buf), lstat64)
      __nonnull ((1, 2));
+#   endif
 #  else
-#   define lstat lstat64
+#   ifdef __USE_TIME_BITS64
+#    define lstat __lstat64_time64
+#   else
+#    define lstat lstat64
+#   endif
 #  endif
 # endif
 # ifdef __USE_LARGEFILE64
@@ -357,6 +381,15 @@ extern int mkfifoat (int __fd, const char *__path, __mode_t __mode)
 #ifdef __USE_ATFILE
 /* Set file access and modification times relative to directory file
    descriptor.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (utimensat, (int __fd, const char *__path,
+           const struct timespec __times[2], int __flags),
+           __utimensat64) __THROW __nonnull((2));
+# else
+# define utimensat __utimensat64
+# endif
+#endif
 extern int utimensat (int __fd, const char *__path,
 		      const struct timespec __times[2],
 		      int __flags)
@@ -365,6 +398,14 @@ extern int utimensat (int __fd, const char *__path,
 
 #ifdef __USE_XOPEN2K8
 /* Set file access and modification times of the file associated with FD.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (futimens, (int __fd, const struct timespec __times[2]),
+           __futimens64) __THROW;
+# else
+# define futimens __futimens64
+# endif
+#endif
 extern int futimens (int __fd, const struct timespec __times[2]) __THROW;
 #endif
 
@@ -403,6 +444,21 @@ extern int __fxstatat (int __ver, int __fildes, const char *__filename,
      __THROW __nonnull ((3, 4));
 #else
 # ifdef __REDIRECT_NTH
+#  ifdef __USE_TIME_BITS64
+extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
+				      struct stat *__stat_buf), __fxstat64_time64)
+     __nonnull ((3));
+extern int __REDIRECT_NTH (__xstat, (int __ver, const char *__filename,
+				     struct stat *__stat_buf), __xstat64_time64)
+     __nonnull ((2, 3));
+extern int __REDIRECT_NTH (__lxstat, (int __ver, const char *__filename,
+				      struct stat *__stat_buf), __lxstat64_time64)
+     __nonnull ((2, 3));
+extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
+					const char *__filename,
+					struct stat *__stat_buf, int __flag),
+			   __fxstatat64_time64) __nonnull ((3, 4));
+#  else
 extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
 				      struct stat *__stat_buf), __fxstat64)
      __nonnull ((3));
@@ -416,11 +472,18 @@ extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
 					const char *__filename,
 					struct stat *__stat_buf, int __flag),
 			   __fxstatat64) __nonnull ((3, 4));
+#  endif
 
 # else
-#  define __fxstat __fxstat64
-#  define __xstat __xstat64
-#  define __lxstat __lxstat64
+#  ifdef __USE_TIME_BITS64
+#   define __fxstat __fxstat64_time64
+#   define __xstat __xstat64_time64
+#   define __lxstat __lxstat64_time64
+#  else
+#   define __fxstat __fxstat64
+#   define __xstat __xstat64
+#   define __lxstat __lxstat64
+#  endif
 # endif
 #endif
 

io/utime.c

@@ -38,3 +38,19 @@ utime (const char *file, const struct utimbuf *times)
 libc_hidden_def (utime)
 
 stub_warning (utime)
+
+/* 64-bit time version */
+
+int
+__utime64 (const char *file, const struct __utimbuf64 *times)
+{
+  if (file == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__utime64)

io/utime.h

@@ -27,20 +27,30 @@
 __BEGIN_DECLS
 
 #include <bits/types.h>
+#include <bits/types/time_t.h>
 
 #if defined __USE_XOPEN || defined __USE_XOPEN2K
 # include <bits/types/time_t.h>
 #endif
 
-/* Structure describing file times.  */
+/* Structure describing file times, 32- or 64-bit time.  */
 struct utimbuf
   {
-    __time_t actime;		/* Access time.  */
-    __time_t modtime;		/* Modification time.  */
+    time_t actime;		/* Access time.  */
+    time_t modtime;		/* Modification time.  */
   };
 
 /* Set the access and modification times of FILE to those given in
    *FILE_TIMES.  If FILE_TIMES is NULL, set them to the current time.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (utime, (const char *__file,
+     const struct utimbuf *__file_times),
+     __utime64) __THROW __nonnull ((1));
+# else
+# define utime __utime64
+# endif
+#endif
 extern int utime (const char *__file,
 		  const struct utimbuf *__file_times)
      __THROW __nonnull ((1));

io/utimensat.c

@@ -30,3 +30,12 @@ utimensat (int fd, const char *file, const struct timespec tsp[2],
   return -1;
 }
 stub_warning (utimensat)
+
+int
+__utimensat_time64 (int fd, const char *file, const struct __timespec64 tsp[2],
+	   int flags)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__utimensat_time64)

manual/creature.texi

@@ -165,6 +165,34 @@ This macro was introduced as part of the Large File Support extension
 (LFS).
 @end defvr
 
+@defvr Macro _TIME_BITS
+This macro determines the bit size of @code{time_t} (and therefore the
+bit size of all @code{time_t} derived types and the prototypes of all
+related functions). If @code{_TIME_BITS} is undefined, the bit size of
+time_t equals the bit size of the architecture.
+
+If @code{_TIME_BITS} is undefined, or if @code{_TIME_BITS} is defined
+to the value @code{32} and @code{__WORDSIZE} is defined to the value
+@code{32}, or or if @code{_TIME_BITS} is defined to the value @code{64}
+and @code{__WORDSIZE} is defined to the value @code{64}, nothing changes.
+
+If @code{_TIME_BITS} is defined to the value @code{64} and if
+@code{__WORDSIZE} is defined to the value @code{32}, then the @w{64 bit}
+time API and implementation are used even though the architecture word
+size is @code{32}. Also, if the kernel provides @w{64 bit} time support,
+it is used; otherwise, the @w{32 bit} kernel time support is used (with
+no provision to address kernel Y2038 shortcomings).
+
+If @code{_TIME_BITS} is defined to the value @code{32} and if
+@code{__WORDSIZE} is defined to the value @code{64}, then a compile-time
+error is emitted.
+
+If @code{_TIME_BITS} is defined to a value different from both @code{32}
+and @code{64}, then a compile-time error is emitted.
+
+This macro was introduced as part of the Y2038 support.
+@end defvr
+
 @defvr Macro _ISOC99_SOURCE
 @standards{GNU, (none)}
 If this macro is defined, features from ISO C99 are included.  Since

misc/Makefile

@@ -71,7 +71,7 @@ routines := brk sbrk sstk ioctl \
 	    fgetxattr flistxattr fremovexattr fsetxattr getxattr \
 	    listxattr lgetxattr llistxattr lremovexattr lsetxattr \
 	    removexattr setxattr getauxval ifunc-impl-list makedev \
-	    allocate_once
+	    allocate_once y2038-support utimes64
 
 generated += tst-error1.mtrace tst-error1-mem.out \
   tst-allocate_once.mtrace tst-allocate_once-mem.out

misc/Versions

@@ -158,6 +158,8 @@ libc {
   GLIBC_2.26 {
     preadv2; preadv64v2; pwritev2; pwritev64v2;
   }
+  GLIBC_2.29 {
+  }
   GLIBC_PRIVATE {
     __madvise;
     __mktemp;
@@ -166,5 +168,7 @@ libc {
     __mmap; __munmap; __mprotect;
     __sched_get_priority_min; __sched_get_priority_max;
     __libc_allocate_once_slow;
+    __y2038_get_kernel_support;
+    __y2038_set_kernel_support;
   }
 }

misc/futimes.c

@@ -30,3 +30,12 @@ __futimes (int fd, const struct timeval tvp[2])
 weak_alias (__futimes, futimes)
 
 stub_warning (futimes)
+
+int
+__futimes64 (int fd, const struct __timeval64 tvp[2])
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+stub_warning (__futimes64)

misc/lutimes.c

@@ -31,3 +31,11 @@ __lutimes (const char *file, const struct timeval tvp[2])
 weak_alias (__lutimes, lutimes)
 
 stub_warning (lutimes)
+
+int
+__lutimes64 (const char *file, const struct __timeval64 tvp[2])
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__lutimes64)

misc/sys/select.h

@@ -35,6 +35,7 @@
 /* Get definition of timer specification structures.  */
 #include <bits/types/time_t.h>
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 #ifdef __USE_XOPEN2K
 # include <bits/types/struct_timespec.h>
 #endif
@@ -98,6 +99,18 @@ __BEGIN_DECLS
 
    This function is a cancellation point and therefore not marked with
    __THROW.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (select, (int __nfds,
+                                fd_set *__restrict __readfds,
+                                fd_set *__restrict __writefds,
+                                fd_set *__restrict __exceptfds,
+                                struct timeval *__restrict __timeout),
+                       __select64);
+# else
+# define select __select64
+# endif
+#endif
 extern int select (int __nfds, fd_set *__restrict __readfds,
 		   fd_set *__restrict __writefds,
 		   fd_set *__restrict __exceptfds,
@@ -110,6 +123,19 @@ extern int select (int __nfds, fd_set *__restrict __readfds,
 
    This function is a cancellation point and therefore not marked with
    __THROW.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (pselect, (int __nfds,
+                                 fd_set *__restrict __readfds,
+                                 fd_set *__restrict __writefds,
+                                 fd_set *__restrict __exceptfds,
+                                 const struct timespec *__restrict __timeout,
+                                 const __sigset_t *__restrict __sigmask),
+                       __pselect64);
+# else
+# define pselect __pselect64
+# endif
+#endif
 extern int pselect (int __nfds, fd_set *__restrict __readfds,
 		    fd_set *__restrict __writefds,
 		    fd_set *__restrict __exceptfds,

misc/utimes.c

@@ -38,3 +38,18 @@ __utimes (const char *file, const struct timeval tvp[2])
 weak_alias (__utimes, utimes)
 
 stub_warning (utimes)
+
+int
+__utimes64 (const char *file, const struct __timeval64 tvp[2])
+{
+  if (file == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+stub_warning (__utimes64)

misc/y2038-support.c

@@ -0,0 +1,40 @@
+/* y2038 general kernel support indication.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdbool.h>
+
+#ifndef __ASSUME_KERNEL_Y2038_SUPPORT
+
+/* By default glibc assumes the underlying kernel does not support Y2038.  */ 
+bool
+__default_y2038_get_kernel_support (void)
+{
+  return false;
+}
+weak_alias (__default_y2038_get_kernel_support, __y2038_get_kernel_support)
+
+/* By default glibc just ignores Y2038 support indication setting.  */ 
+void
+__default_y2038_set_kernel_support (bool support __attribute__ ((unused)))
+{
+  /* Do nothing.  */
+}
+weak_alias (__default_y2038_set_kernel_support, __y2038_set_kernel_support)
+
+#endif

misc/y2038-support.h

@@ -0,0 +1,33 @@
+/* y2038 general kernel support indication.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdbool.h>
+
+/* If we do not assume that the kernel provides 64-bit-time syscalls,
+ * then we need a dynamic way to remember whether it does or not.  */
+
+#ifndef __ASSUME_KERNEL_Y2038_SUPPORT
+
+/* Dynamically check whether actual kernel supports Y2038 or not.  */
+extern bool __y2038_get_kernel_support (void);
+
+/* Dynamically set whether actual kernel supports Y2038 or not.  */
+extern void __y2038_set_kernel_support (bool support);
+
+#endif

nptl/Versions

@@ -269,6 +269,7 @@ libpthread {
   GLIBC_2.22 {
   }
 
+<<<<<<< HEAD
   # C11 thread symbols.
   GLIBC_2.28 {
     thrd_create; thrd_detach; thrd_exit; thrd_join;
@@ -277,6 +278,14 @@ libpthread {
     cnd_timedwait; cnd_wait; tss_create; tss_delete; tss_get; tss_set;
   }
 
+  GLIBC_2.29 {
+    __pthread_rwlock_rdlock64;
+    __pthread_rwlock_wrlock64;
+    __pthread_mutex_timedlock64;
+    __sem_timedwait64;
+    __pthread_cond_timedwait64;
+  }
+
   GLIBC_PRIVATE {
     __pthread_initialize_minimal;
     __pthread_clock_gettime; __pthread_clock_settime;

nptl/lll_timedlock_wait.c

@@ -57,3 +57,40 @@ __lll_timedlock_wait (int *futex, const struct timespec *abstime, int private)
 
   return 0;
 }
+
+/* 64-bit time version */
+
+int
+__lll_timedlock_wait64 (int *futex, const struct __timespec64 *abstime, int private)
+{
+  /* Reject invalid timeouts.  */
+  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+    return EINVAL;
+
+  /* Try locking.  */
+  while (atomic_exchange_acq (futex, 2) != 0)
+    {
+      struct timeval tv;
+
+      /* Get the current time.  */
+      (void) __gettimeofday (&tv, NULL);
+
+      /* Compute relative timeout.  */
+      struct timespec rt;
+      rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+      rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+      if (rt.tv_nsec < 0)
+        {
+          rt.tv_nsec += 1000000000;
+          --rt.tv_sec;
+        }
+
+      if (rt.tv_sec < 0)
+        return ETIMEDOUT;
+
+      /* If *futex == 2, wait until woken or timeout.  */
+      lll_futex_timed_wait (futex, 2, &rt, private);
+    }
+
+  return 0;
+}

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

nptl/pthread_cond_wait.c

@@ -647,6 +647,280 @@ __pthread_cond_wait_common (pthread_cond_t *cond, pthread_mutex_t *mutex,
   return (err != 0) ? err : result;
 }
 
+/* 64-bit time variant */
+
+static __always_inline int
+__pthread_cond_wait_common64 (pthread_cond_t *cond, pthread_mutex_t *mutex,
+    const struct __timespec64 *abstime)
+{
+  const int maxspin = 0;
+  int err;
+  int result = 0;
+
+  LIBC_PROBE (cond_wait, 2, cond, mutex);
+
+  /* Acquire a position (SEQ) in the waiter sequence (WSEQ).  We use an
+     atomic operation because signals and broadcasts may update the group
+     switch without acquiring the mutex.  We do not need release MO here
+     because we do not need to establish any happens-before relation with
+     signalers (see __pthread_cond_signal); modification order alone
+     establishes a total order of waiters/signals.  We do need acquire MO
+     to synchronize with group reinitialization in
+     __condvar_quiesce_and_switch_g1.  */
+  uint64_t wseq = __condvar_fetch_add_wseq_acquire (cond, 2);
+  /* Find our group's index.  We always go into what was G2 when we acquired
+     our position.  */
+  unsigned int g = wseq & 1;
+  uint64_t seq = wseq >> 1;
+
+  /* Increase the waiter reference count.  Relaxed MO is sufficient because
+     we only need to synchronize when decrementing the reference count.  */
+  unsigned int flags = atomic_fetch_add_relaxed (&cond->__data.__wrefs, 8);
+  int private = __condvar_get_private (flags);
+
+  /* Now that we are registered as a waiter, we can release the mutex.
+     Waiting on the condvar must be atomic with releasing the mutex, so if
+     the mutex is used to establish a happens-before relation with any
+     signaler, the waiter must be visible to the latter; thus, we release the
+     mutex after registering as waiter.
+     If releasing the mutex fails, we just cancel our registration as a
+     waiter and confirm that we have woken up.  */
+  err = __pthread_mutex_unlock_usercnt (mutex, 0);
+  if (__glibc_unlikely (err != 0))
+    {
+      __condvar_cancel_waiting (cond, seq, g, private);
+      __condvar_confirm_wakeup (cond, private);
+      return err;
+    }
+
+  /* Now wait until a signal is available in our group or it is closed.
+     Acquire MO so that if we observe a value of zero written after group
+     switching in __condvar_quiesce_and_switch_g1, we synchronize with that
+     store and will see the prior update of __g1_start done while switching
+     groups too.  */
+  unsigned int signals = atomic_load_acquire (cond->__data.__g_signals + g);
+
+  do
+    {
+      while (1)
+	{
+	  /* Spin-wait first.
+	     Note that spinning first without checking whether a timeout
+	     passed might lead to what looks like a spurious wake-up even
+	     though we should return ETIMEDOUT (e.g., if the caller provides
+	     an absolute timeout that is clearly in the past).  However,
+	     (1) spurious wake-ups are allowed, (2) it seems unlikely that a
+	     user will (ab)use pthread_cond_wait as a check for whether a
+	     point in time is in the past, and (3) spinning first without
+	     having to compare against the current time seems to be the right
+	     choice from a performance perspective for most use cases.  */
+	  unsigned int spin = maxspin;
+	  while (signals == 0 && spin > 0)
+	    {
+	      /* Check that we are not spinning on a group that's already
+		 closed.  */
+	      if (seq < (__condvar_load_g1_start_relaxed (cond) >> 1))
+		goto done;
+
+	      /* TODO Back off.  */
+
+	      /* Reload signals.  See above for MO.  */
+	      signals = atomic_load_acquire (cond->__data.__g_signals + g);
+	      spin--;
+	    }
+
+	  /* If our group will be closed as indicated by the flag on signals,
+	     don't bother grabbing a signal.  */
+	  if (signals & 1)
+	    goto done;
+
+	  /* If there is an available signal, don't block.  */
+	  if (signals != 0)
+	    break;
+
+	  /* No signals available after spinning, so prepare to block.
+	     We first acquire a group reference and use acquire MO for that so
+	     that we synchronize with the dummy read-modify-write in
+	     __condvar_quiesce_and_switch_g1 if we read from that.  In turn,
+	     in this case this will make us see the closed flag on __g_signals
+	     that designates a concurrent attempt to reuse the group's slot.
+	     We use acquire MO for the __g_signals check to make the
+	     __g1_start check work (see spinning above).
+	     Note that the group reference acquisition will not mask the
+	     release MO when decrementing the reference count because we use
+	     an atomic read-modify-write operation and thus extend the release
+	     sequence.  */
+	  atomic_fetch_add_acquire (cond->__data.__g_refs + g, 2);
+	  if (((atomic_load_acquire (cond->__data.__g_signals + g) & 1) != 0)
+	      || (seq < (__condvar_load_g1_start_relaxed (cond) >> 1)))
+	    {
+	      /* Our group is closed.  Wake up any signalers that might be
+		 waiting.  */
+	      __condvar_dec_grefs (cond, g, private);
+	      goto done;
+	    }
+
+	  // Now block.
+	  struct _pthread_cleanup_buffer buffer;
+	  struct _condvar_cleanup_buffer cbuffer;
+	  cbuffer.wseq = wseq;
+	  cbuffer.cond = cond;
+	  cbuffer.mutex = mutex;
+	  cbuffer.private = private;
+	  __pthread_cleanup_push (&buffer, __condvar_cleanup_waiting, &cbuffer);
+
+	  if (abstime == NULL)
+	    {
+	      /* Block without a timeout.  */
+	      err = futex_wait_cancelable (
+		  cond->__data.__g_signals + g, 0, private);
+	    }
+	  else
+	    {
+	      /* Block, but with a timeout.
+		 Work around the fact that the kernel rejects negative timeout
+		 values despite them being valid.  */
+	      if (__glibc_unlikely (abstime->tv_sec < 0))
+	        err = ETIMEDOUT;
+
+	      else if ((flags & __PTHREAD_COND_CLOCK_MONOTONIC_MASK) != 0)
+		{
+		  /* CLOCK_MONOTONIC is requested.  */
+		  struct timespec rt;
+		  struct __timespec64 rt64;
+		  if (__clock_gettime (CLOCK_MONOTONIC, &rt) != 0)
+		    __libc_fatal ("clock_gettime does not support "
+				  "CLOCK_MONOTONIC");
+		  /* Convert the absolute timeout value to a relative
+		     timeout.  */
+		  rt64.tv_sec = abstime->tv_sec - rt.tv_sec;
+		  rt64.tv_nsec = abstime->tv_nsec - rt.tv_nsec;
+		  if (rt64.tv_nsec < 0)
+		    {
+		      rt64.tv_nsec += 1000000000;
+		      --rt64.tv_sec;
+		    }
+		  /* Did we already time out?  */
+		  if (__glibc_unlikely (rt64.tv_sec < 0))
+		    err = ETIMEDOUT;
+		  else
+		    err = futex_reltimed_wait_cancelable64
+			(cond->__data.__g_signals + g, 0, &rt64, private);
+		}
+	      else
+		{
+		  /* Use CLOCK_REALTIME.  */
+		  err = futex_abstimed_wait_cancelable64
+		      (cond->__data.__g_signals + g, 0, abstime, private);
+		}
+	    }
+
+	  __pthread_cleanup_pop (&buffer, 0);
+
+	  if (__glibc_unlikely (err == ETIMEDOUT))
+	    {
+	      __condvar_dec_grefs (cond, g, private);
+	      /* If we timed out, we effectively cancel waiting.  Note that
+		 we have decremented __g_refs before cancellation, so that a
+		 deadlock between waiting for quiescence of our group in
+		 __condvar_quiesce_and_switch_g1 and us trying to acquire
+		 the lock during cancellation is not possible.  */
+	      __condvar_cancel_waiting (cond, seq, g, private);
+	      result = ETIMEDOUT;
+	      goto done;
+	    }
+	  else
+	    __condvar_dec_grefs (cond, g, private);
+
+	  /* Reload signals.  See above for MO.  */
+	  signals = atomic_load_acquire (cond->__data.__g_signals + g);
+	}
+
+    }
+  /* Try to grab a signal.  Use acquire MO so that we see an up-to-date value
+     of __g1_start below (see spinning above for a similar case).  In
+     particular, if we steal from a more recent group, we will also see a
+     more recent __g1_start below.  */
+  while (!atomic_compare_exchange_weak_acquire (cond->__data.__g_signals + g,
+						&signals, signals - 2));
+
+  /* We consumed a signal but we could have consumed from a more recent group
+     that aliased with ours due to being in the same group slot.  If this
+     might be the case our group must be closed as visible through
+     __g1_start.  */
+  uint64_t g1_start = __condvar_load_g1_start_relaxed (cond);
+  if (seq < (g1_start >> 1))
+    {
+      /* We potentially stole a signal from a more recent group but we do not
+	 know which group we really consumed from.
+	 We do not care about groups older than current G1 because they are
+	 closed; we could have stolen from these, but then we just add a
+	 spurious wake-up for the current groups.
+	 We will never steal a signal from current G2 that was really intended
+	 for G2 because G2 never receives signals (until it becomes G1).  We
+	 could have stolen a signal from G2 that was conservatively added by a
+	 previous waiter that also thought it stole a signal -- but given that
+	 that signal was added unnecessarily, it's not a problem if we steal
+	 it.
+	 Thus, the remaining case is that we could have stolen from the current
+	 G1, where "current" means the __g1_start value we observed.  However,
+	 if the current G1 does not have the same slot index as we do, we did
+	 not steal from it and do not need to undo that.  This is the reason
+	 for putting a bit with G2's index into__g1_start as well.  */
+      if (((g1_start & 1) ^ 1) == g)
+	{
+	  /* We have to conservatively undo our potential mistake of stealing
+	     a signal.  We can stop trying to do that when the current G1
+	     changes because other spinning waiters will notice this too and
+	     __condvar_quiesce_and_switch_g1 has checked that there are no
+	     futex waiters anymore before switching G1.
+	     Relaxed MO is fine for the __g1_start load because we need to
+	     merely be able to observe this fact and not have to observe
+	     something else as well.
+	     ??? Would it help to spin for a little while to see whether the
+	     current G1 gets closed?  This might be worthwhile if the group is
+	     small or close to being closed.  */
+	  unsigned int s = atomic_load_relaxed (cond->__data.__g_signals + g);
+	  while (__condvar_load_g1_start_relaxed (cond) == g1_start)
+	    {
+	      /* Try to add a signal.  We don't need to acquire the lock
+		 because at worst we can cause a spurious wake-up.  If the
+		 group is in the process of being closed (LSB is true), this
+		 has an effect similar to us adding a signal.  */
+	      if (((s & 1) != 0)
+		  || atomic_compare_exchange_weak_relaxed
+		       (cond->__data.__g_signals + g, &s, s + 2))
+		{
+		  /* If we added a signal, we also need to add a wake-up on
+		     the futex.  We also need to do that if we skipped adding
+		     a signal because the group is being closed because
+		     while __condvar_quiesce_and_switch_g1 could have closed
+		     the group, it might stil be waiting for futex waiters to
+		     leave (and one of those waiters might be the one we stole
+		     the signal from, which cause it to block using the
+		     futex).  */
+		  futex_wake (cond->__data.__g_signals + g, 1, private);
+		  break;
+		}
+	      /* TODO Back off.  */
+	    }
+	}
+    }
+
+ done:
+
+  /* Confirm that we have been woken.  We do that before acquiring the mutex
+     to allow for execution of pthread_cond_destroy while having acquired the
+     mutex.  */
+  __condvar_confirm_wakeup (cond, private);
+
+  /* Woken up; now re-acquire the mutex.  If this doesn't fail, return RESULT,
+     which is set to ETIMEDOUT if a timeout occured, or zero otherwise.  */
+  err = __pthread_mutex_cond_lock (mutex);
+  /* XXX Abort on errors that are disallowed by POSIX?  */
+  return (err != 0) ? err : result;
+}
+
 
 /* See __pthread_cond_wait_common.  */
 int
@@ -667,6 +941,17 @@ __pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
   return __pthread_cond_wait_common (cond, mutex, abstime);
 }
 
+int
+__pthread_cond_timedwait64 (pthread_cond_t *cond, pthread_mutex_t *mutex,
+    const struct __timespec64 *abstime)
+{
+  /* Check parameter validity.  This should also tell the compiler that
+     it can assume that abstime is not NULL.  */
+  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+    return EINVAL;
+  return __pthread_cond_wait_common64 (cond, mutex, abstime);
+}
+
 versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait,
 		  GLIBC_2_3_2);
 versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,

nptl/pthread_mutex_timedlock.c

@@ -25,6 +25,7 @@
 #include <atomic.h>
 #include <lowlevellock.h>
 #include <not-cancel.h>
+#include <y2038-support.h>
 
 #include <stap-probe.h>
 
@@ -32,6 +33,10 @@
 #define lll_timedlock_elision(a,dummy,b,c) lll_timedlock(a, b, c)
 #endif
 
+#ifndef lll_timedlock_elision64
+#define lll_timedlock_elision64(a,dummy,b,c) lll_timedlock64(a, b, c)
+#endif
+
 #ifndef lll_trylock_elision
 #define lll_trylock_elision(a,t) lll_trylock(a)
 #endif
@@ -649,3 +654,635 @@ __pthread_mutex_timedlock (pthread_mutex_t *mutex,
   return result;
 }
 weak_alias (__pthread_mutex_timedlock, pthread_mutex_timedlock)
+
+/* 64-bit time version */
+
+int
+__pthread_mutex_timedlock64 (pthread_mutex_t *mutex,
+			 const struct __timespec64 *abstime)
+{
+/* Only compile this function if kernel provides clock_gettime64 */
+#ifdef __NR_clock_gettime64
+  int oldval;
+  pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+  int result = 0;
+#endif
+  struct timespec abstime32;
+
+  LIBC_PROBE (mutex_timedlock_entry, 2, mutex, abstime);
+
+/* Only compile this function if kernel provides clock_gettime64 */
+#ifdef __NR_clock_gettime64
+  if (__y2038_get_kernel_support())
+    {
+
+      /* We must not check ABSTIME here.  If the thread does not block
+         abstime must not be checked for a valid value.  */
+
+      switch (__builtin_expect (PTHREAD_MUTEX_TYPE_ELISION (mutex),
+                    PTHREAD_MUTEX_TIMED_NP))
+        {
+          /* Recursive mutex.  */
+        case PTHREAD_MUTEX_RECURSIVE_NP|PTHREAD_MUTEX_ELISION_NP:
+        case PTHREAD_MUTEX_RECURSIVE_NP:
+          /* Check whether we already hold the mutex.  */
+          if (mutex->__data.__owner == id)
+        {
+          /* Just bump the counter.  */
+          if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+            /* Overflow of the counter.  */
+            return EAGAIN;
+
+          ++mutex->__data.__count;
+
+          goto out;
+        }
+
+          /* We have to get the mutex.  */
+          result = lll_timedlock64 (mutex->__data.__lock, abstime,
+                          PTHREAD_MUTEX_PSHARED (mutex));
+
+          if (result != 0)
+        goto out;
+
+          /* Only locked once so far.  */
+          mutex->__data.__count = 1;
+          break;
+
+          /* Error checking mutex.  */
+        case PTHREAD_MUTEX_ERRORCHECK_NP:
+          /* Check whether we already hold the mutex.  */
+          if (__glibc_unlikely (mutex->__data.__owner == id))
+        return EDEADLK;
+
+          /* Don't do lock elision on an error checking mutex.  */
+          goto simple;
+
+        case PTHREAD_MUTEX_TIMED_NP:
+          FORCE_ELISION (mutex, goto elision);
+        simple:
+          /* Normal mutex.  */
+          result = lll_timedlock64 (mutex->__data.__lock, abstime,
+                          PTHREAD_MUTEX_PSHARED (mutex));
+          break;
+
+        case PTHREAD_MUTEX_TIMED_ELISION_NP:
+        elision: __attribute__((unused))
+          /* Don't record ownership */
+          return lll_timedlock_elision64 (mutex->__data.__lock,
+                        mutex->__data.__spins,
+                        abstime,
+                        PTHREAD_MUTEX_PSHARED (mutex));
+
+
+        case PTHREAD_MUTEX_ADAPTIVE_NP:
+          if (! __is_smp)
+        goto simple;
+
+          if (lll_trylock (mutex->__data.__lock) != 0)
+        {
+          int cnt = 0;
+          int max_cnt = MIN (MAX_ADAPTIVE_COUNT,
+                     mutex->__data.__spins * 2 + 10);
+          do
+            {
+              if (cnt++ >= max_cnt)
+            {
+              result = lll_timedlock64 (mutex->__data.__lock, abstime,
+                              PTHREAD_MUTEX_PSHARED (mutex));
+              break;
+            }
+              atomic_spin_nop ();
+            }
+          while (lll_trylock (mutex->__data.__lock) != 0);
+
+          mutex->__data.__spins += (cnt - mutex->__data.__spins) / 8;
+        }
+          break;
+
+        case PTHREAD_MUTEX_ROBUST_RECURSIVE_NP:
+        case PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP:
+        case PTHREAD_MUTEX_ROBUST_NORMAL_NP:
+        case PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP:
+          THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+                 &mutex->__data.__list.__next);
+          /* We need to set op_pending before starting the operation.  Also
+         see comments at ENQUEUE_MUTEX.  */
+          __asm ("" ::: "memory");
+
+          oldval = mutex->__data.__lock;
+          /* This is set to FUTEX_WAITERS iff we might have shared the
+         FUTEX_WAITERS flag with other threads, and therefore need to keep it
+         set to avoid lost wake-ups.  We have the same requirement in the
+         simple mutex algorithm.  */
+          unsigned int assume_other_futex_waiters = 0;
+          while (1)
+        {
+          /* Try to acquire the lock through a CAS from 0 (not acquired) to
+             our TID | assume_other_futex_waiters.  */
+          if (__glibc_likely (oldval == 0))
+            {
+              oldval
+                = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                    id | assume_other_futex_waiters, 0);
+              if (__glibc_likely (oldval == 0))
+            break;
+            }
+
+          if ((oldval & FUTEX_OWNER_DIED) != 0)
+            {
+              /* The previous owner died.  Try locking the mutex.  */
+              int newval = id | (oldval & FUTEX_WAITERS)
+              | assume_other_futex_waiters;
+
+              newval
+            = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                                   newval, oldval);
+              if (newval != oldval)
+            {
+              oldval = newval;
+              continue;
+            }
+
+              /* We got the mutex.  */
+              mutex->__data.__count = 1;
+              /* But it is inconsistent unless marked otherwise.  */
+              mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
+              /* We must not enqueue the mutex before we have acquired it.
+             Also see comments at ENQUEUE_MUTEX.  */
+              __asm ("" ::: "memory");
+              ENQUEUE_MUTEX (mutex);
+              /* We need to clear op_pending after we enqueue the mutex.  */
+              __asm ("" ::: "memory");
+              THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+              /* Note that we deliberately exit here.  If we fall
+             through to the end of the function __nusers would be
+             incremented which is not correct because the old
+             owner has to be discounted.  */
+              return EOWNERDEAD;
+            }
+
+          /* Check whether we already hold the mutex.  */
+          if (__glibc_unlikely ((oldval & FUTEX_TID_MASK) == id))
+            {
+              int kind = PTHREAD_MUTEX_TYPE (mutex);
+              if (kind == PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP)
+            {
+              /* We do not need to ensure ordering wrt another memory
+                 access.  Also see comments at ENQUEUE_MUTEX. */
+              THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+                     NULL);
+              return EDEADLK;
+            }
+
+              if (kind == PTHREAD_MUTEX_ROBUST_RECURSIVE_NP)
+            {
+              /* We do not need to ensure ordering wrt another memory
+                 access.  */
+              THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+                     NULL);
+
+              /* Just bump the counter.  */
+              if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+                /* Overflow of the counter.  */
+                return EAGAIN;
+
+              ++mutex->__data.__count;
+
+              LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
+              return 0;
+            }
+            }
+
+          /* We are about to block; check whether the timeout is invalid.  */
+          if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+            return EINVAL;
+          /* Work around the fact that the kernel rejects negative timeout
+             values despite them being valid.  */
+          if (__glibc_unlikely (abstime->tv_sec < 0))
+            return ETIMEDOUT;
+    #if (!defined __ASSUME_FUTEX_CLOCK_REALTIME \
+         || !defined lll_futex_timed_wait_bitset)
+          struct timeval tv;
+          struct timespec rt;
+
+          /* Get the current time.  */
+          (void) __gettimeofday (&tv, NULL);
+
+          /* Compute relative timeout.  */
+          rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+          rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+          if (rt.tv_nsec < 0)
+            {
+              rt.tv_nsec += 1000000000;
+              --rt.tv_sec;
+            }
+
+          /* Already timed out?  */
+          if (rt.tv_sec < 0)
+            return ETIMEDOUT;
+    #endif
+
+          /* We cannot acquire the mutex nor has its owner died.  Thus, try
+             to block using futexes.  Set FUTEX_WAITERS if necessary so that
+             other threads are aware that there are potentially threads
+             blocked on the futex.  Restart if oldval changed in the
+             meantime.  */
+          if ((oldval & FUTEX_WAITERS) == 0)
+            {
+              if (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock,
+                                oldval | FUTEX_WAITERS,
+                                oldval)
+              != 0)
+            {
+              oldval = mutex->__data.__lock;
+              continue;
+            }
+              oldval |= FUTEX_WAITERS;
+            }
+
+          /* It is now possible that we share the FUTEX_WAITERS flag with
+             another thread; therefore, update assume_other_futex_waiters so
+             that we do not forget about this when handling other cases
+             above and thus do not cause lost wake-ups.  */
+          assume_other_futex_waiters |= FUTEX_WAITERS;
+
+          /* Block using the futex.  */
+    #if (!defined __ASSUME_FUTEX_CLOCK_REALTIME \
+         || !defined lll_futex_timed_wait_bitset)
+          lll_futex_timed wait_64 (&mutex->__data.__lock, oldval,
+                    &rt, PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
+    #else
+          int err = lll_futex_timed_wait_bitset64 (&mutex->__data.__lock,
+              oldval, abstime, FUTEX_CLOCK_REALTIME,
+              PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
+          /* The futex call timed out.  */
+          if (err == -ETIMEDOUT)
+            return -err;
+    #endif
+          /* Reload current lock value.  */
+          oldval = mutex->__data.__lock;
+        }
+
+          /* We have acquired the mutex; check if it is still consistent.  */
+          if (__builtin_expect (mutex->__data.__owner
+                    == PTHREAD_MUTEX_NOTRECOVERABLE, 0))
+        {
+          /* This mutex is now not recoverable.  */
+          mutex->__data.__count = 0;
+          int private = PTHREAD_ROBUST_MUTEX_PSHARED (mutex);
+          lll_unlock (mutex->__data.__lock, private);
+          /* FIXME This violates the mutex destruction requirements.  See
+             __pthread_mutex_unlock_full.  */
+          THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+          return ENOTRECOVERABLE;
+        }
+
+          mutex->__data.__count = 1;
+          /* We must not enqueue the mutex before we have acquired it.
+         Also see comments at ENQUEUE_MUTEX.  */
+          __asm ("" ::: "memory");
+          ENQUEUE_MUTEX (mutex);
+          /* We need to clear op_pending after we enqueue the mutex.  */
+          __asm ("" ::: "memory");
+          THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+          break;
+
+        /* The PI support requires the Linux futex system call.  If that's not
+           available, pthread_mutex_init should never have allowed the type to
+           be set.  So it will get the default case for an invalid type.  */
+    #ifdef __NR_futex
+        case PTHREAD_MUTEX_PI_RECURSIVE_NP:
+        case PTHREAD_MUTEX_PI_ERRORCHECK_NP:
+        case PTHREAD_MUTEX_PI_NORMAL_NP:
+        case PTHREAD_MUTEX_PI_ADAPTIVE_NP:
+        case PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP:
+        case PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP:
+        case PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP:
+        case PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP:
+          {
+        int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
+        int robust = mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP;
+
+        if (robust)
+          {
+            /* Note: robust PI futexes are signaled by setting bit 0.  */
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+                   (void *) (((uintptr_t) &mutex->__data.__list.__next)
+                         | 1));
+            /* We need to set op_pending before starting the operation.  Also
+               see comments at ENQUEUE_MUTEX.  */
+            __asm ("" ::: "memory");
+          }
+
+        oldval = mutex->__data.__lock;
+
+        /* Check whether we already hold the mutex.  */
+        if (__glibc_unlikely ((oldval & FUTEX_TID_MASK) == id))
+          {
+            if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+              {
+            /* We do not need to ensure ordering wrt another memory
+               access.  */
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+            return EDEADLK;
+              }
+
+            if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+              {
+            /* We do not need to ensure ordering wrt another memory
+               access.  */
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+            /* Just bump the counter.  */
+            if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+              /* Overflow of the counter.  */
+              return EAGAIN;
+
+            ++mutex->__data.__count;
+
+            LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
+            return 0;
+              }
+          }
+
+        oldval = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                                  id, 0);
+
+        if (oldval != 0)
+          {
+            /* The mutex is locked.  The kernel will now take care of
+               everything.  The timeout value must be a relative value.
+               Convert it.  */
+            int private = (robust
+                   ? PTHREAD_ROBUST_MUTEX_PSHARED (mutex)
+                   : PTHREAD_MUTEX_PSHARED (mutex));
+            INTERNAL_SYSCALL_DECL (__err);
+
+            int e;
+            
+            if (abstime->tv_sec > INT_MAX)
+            {
+              e = EOVERFLOW;
+            }
+            else
+            {
+              struct timespec ts;
+              ts.tv_sec = abstime->tv_sec;
+              ts.tv_nsec = abstime->tv_nsec;
+              e = INTERNAL_SYSCALL (futex, __err, 4, &mutex->__data.__lock,
+                          __lll_private_flag (FUTEX_LOCK_PI,
+                                  private), 1,
+                          &ts);
+            }
+            if (INTERNAL_SYSCALL_ERROR_P (e, __err))
+              {
+            if (INTERNAL_SYSCALL_ERRNO (e, __err) == ETIMEDOUT)
+              return ETIMEDOUT;
+
+            if (INTERNAL_SYSCALL_ERRNO (e, __err) == ESRCH
+                || INTERNAL_SYSCALL_ERRNO (e, __err) == EDEADLK)
+              {
+                assert (INTERNAL_SYSCALL_ERRNO (e, __err) != EDEADLK
+                    || (kind != PTHREAD_MUTEX_ERRORCHECK_NP
+                    && kind != PTHREAD_MUTEX_RECURSIVE_NP));
+                /* ESRCH can happen only for non-robust PI mutexes where
+                   the owner of the lock died.  */
+                assert (INTERNAL_SYSCALL_ERRNO (e, __err) != ESRCH
+                    || !robust);
+
+                /* Delay the thread until the timeout is reached.
+                   Then return ETIMEDOUT.  */
+                struct timespec reltime;
+                struct __timespec64 now;
+
+                INTERNAL_SYSCALL (clock_gettime64, __err, 2, CLOCK_REALTIME,
+                          &now);
+                reltime.tv_sec = abstime->tv_sec - now.tv_sec;
+                reltime.tv_nsec = abstime->tv_nsec - now.tv_nsec;
+                if (reltime.tv_nsec < 0)
+                  {
+                reltime.tv_nsec += 1000000000;
+                --reltime.tv_sec;
+                  }
+                if (reltime.tv_sec >= 0)
+                  while (__nanosleep_nocancel (&reltime, &reltime) != 0)
+                continue;
+
+                return ETIMEDOUT;
+              }
+
+            return INTERNAL_SYSCALL_ERRNO (e, __err);
+              }
+
+            oldval = mutex->__data.__lock;
+
+            assert (robust || (oldval & FUTEX_OWNER_DIED) == 0);
+          }
+
+        if (__glibc_unlikely (oldval & FUTEX_OWNER_DIED))
+          {
+            atomic_and (&mutex->__data.__lock, ~FUTEX_OWNER_DIED);
+
+            /* We got the mutex.  */
+            mutex->__data.__count = 1;
+            /* But it is inconsistent unless marked otherwise.  */
+            mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
+            /* We must not enqueue the mutex before we have acquired it.
+               Also see comments at ENQUEUE_MUTEX.  */
+            __asm ("" ::: "memory");
+            ENQUEUE_MUTEX_PI (mutex);
+            /* We need to clear op_pending after we enqueue the mutex.  */
+            __asm ("" ::: "memory");
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+            /* Note that we deliberately exit here.  If we fall
+               through to the end of the function __nusers would be
+               incremented which is not correct because the old owner
+               has to be discounted.  */
+            return EOWNERDEAD;
+          }
+
+        if (robust
+            && __builtin_expect (mutex->__data.__owner
+                     == PTHREAD_MUTEX_NOTRECOVERABLE, 0))
+          {
+            /* This mutex is now not recoverable.  */
+            mutex->__data.__count = 0;
+
+            INTERNAL_SYSCALL_DECL (__err);
+            INTERNAL_SYSCALL (futex, __err, 4, &mutex->__data.__lock,
+                      __lll_private_flag (FUTEX_UNLOCK_PI,
+                              PTHREAD_ROBUST_MUTEX_PSHARED (mutex)),
+                      0, 0);
+
+            /* To the kernel, this will be visible after the kernel has
+               acquired the mutex in the syscall.  */
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+            return ENOTRECOVERABLE;
+          }
+
+        mutex->__data.__count = 1;
+        if (robust)
+          {
+            /* We must not enqueue the mutex before we have acquired it.
+               Also see comments at ENQUEUE_MUTEX.  */
+            __asm ("" ::: "memory");
+            ENQUEUE_MUTEX_PI (mutex);
+            /* We need to clear op_pending after we enqueue the mutex.  */
+            __asm ("" ::: "memory");
+            THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+          }
+        }
+          break;
+    #endif  /* __NR_futex.  */
+
+        case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+        case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+        case PTHREAD_MUTEX_PP_NORMAL_NP:
+        case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+          {
+        int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
+
+        oldval = mutex->__data.__lock;
+
+        /* Check whether we already hold the mutex.  */
+        if (mutex->__data.__owner == id)
+          {
+            if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+              return EDEADLK;
+
+            if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+              {
+            /* Just bump the counter.  */
+            if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+              /* Overflow of the counter.  */
+              return EAGAIN;
+
+            ++mutex->__data.__count;
+
+            LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+
+            return 0;
+              }
+          }
+
+        int oldprio = -1, ceilval;
+        do
+          {
+            int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+                  >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+            if (__pthread_current_priority () > ceiling)
+              {
+            result = EINVAL;
+              failpp:
+            if (oldprio != -1)
+              __pthread_tpp_change_priority (oldprio, -1);
+            return result;
+              }
+
+            result = __pthread_tpp_change_priority (oldprio, ceiling);
+            if (result)
+              return result;
+
+            ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+            oldprio = ceiling;
+
+            oldval
+              = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                                 ceilval | 1, ceilval);
+
+            if (oldval == ceilval)
+              break;
+
+            do
+              {
+            oldval
+              = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                                 ceilval | 2,
+                                 ceilval | 1);
+
+            if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+              break;
+
+            if (oldval != ceilval)
+              {
+                /* Reject invalid timeouts.  */
+                if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+                  {
+                result = EINVAL;
+                goto failpp;
+                  }
+
+                struct timeval tv;
+                struct timespec rt;
+
+                /* Get the current time.  */
+                (void) __gettimeofday (&tv, NULL);
+
+                /* Compute relative timeout.  */
+                rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+                rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+                if (rt.tv_nsec < 0)
+                  {
+                rt.tv_nsec += 1000000000;
+                --rt.tv_sec;
+                  }
+
+                /* Already timed out?  */
+                if (rt.tv_sec < 0)
+                  {
+                result = ETIMEDOUT;
+                goto failpp;
+                  }
+
+                lll_futex_timed_wait (&mutex->__data.__lock,
+                          ceilval | 2, &rt,
+                          PTHREAD_MUTEX_PSHARED (mutex));
+              }
+              }
+            while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+                                ceilval | 2, ceilval)
+               != ceilval);
+          }
+        while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+
+        assert (mutex->__data.__owner == 0);
+        mutex->__data.__count = 1;
+          }
+          break;
+
+        default:
+          /* Correct code cannot set any other type.  */
+          return EINVAL;
+        }
+
+      if (result == 0)
+        {
+          /* Record the ownership.  */
+          mutex->__data.__owner = id;
+          ++mutex->__data.__nusers;
+
+          LIBC_PROBE (mutex_timedlock_acquired, 1, mutex);
+        }
+     out:
+      return result;
+    }
+#endif
+
+  if (abstime->tv_sec > INT_MAX || abstime->tv_sec < INT_MIN)
+    {
+      return EOVERFLOW;
+    }
+
+  abstime32.tv_sec = (time_t) (abstime->tv_sec);
+  abstime32.tv_nsec = abstime->tv_nsec;
+
+  return __pthread_mutex_timedlock (mutex, &abstime32);
+}

nptl/pthread_rwlock_common.c

@@ -507,6 +507,240 @@ __pthread_rwlock_rdlock_full (pthread_rwlock_t *rwlock,
   return 0;
 }
 
+/* 64-bit time version */
+
+static __always_inline int
+__pthread_rwlock_rdlock_full64 (pthread_rwlock_t *rwlock,
+    const struct __timespec64 *abstime)
+{
+  unsigned int r;
+
+  /* Make sure we are not holding the rwlock as a writer.  This is a deadlock
+     situation we recognize and report.  */
+  if (__glibc_unlikely (atomic_load_relaxed (&rwlock->__data.__cur_writer)
+      == THREAD_GETMEM (THREAD_SELF, tid)))
+    return EDEADLK;
+
+  /* If we prefer writers, recursive rdlock is disallowed, we are in a read
+     phase, and there are other readers present, we try to wait without
+     extending the read phase.  We will be unblocked by either one of the
+     other active readers, or if the writer gives up WRLOCKED (e.g., on
+     timeout).
+     If there are no other readers, we simply race with any existing primary
+     writer; it would have been a race anyway, and changing the odds slightly
+     will likely not make a big difference.  */
+  if (rwlock->__data.__flags == PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)
+    {
+      r = atomic_load_relaxed (&rwlock->__data.__readers);
+      while (((r & PTHREAD_RWLOCK_WRPHASE) == 0)
+	      && ((r & PTHREAD_RWLOCK_WRLOCKED) != 0)
+	      && ((r >> PTHREAD_RWLOCK_READER_SHIFT) > 0))
+	{
+	  /* TODO Spin first.  */
+	  /* Try setting the flag signaling that we are waiting without having
+	     incremented the number of readers.  Relaxed MO is fine because
+	     this is just about waiting for a state change in __readers.  */
+	  if (atomic_compare_exchange_weak_relaxed
+	      (&rwlock->__data.__readers, &r, r | PTHREAD_RWLOCK_RWAITING))
+	    {
+	      /* Wait for as long as the flag is set.  An ABA situation is
+		 harmless because the flag is just about the state of
+		 __readers, and all threads set the flag under the same
+		 conditions.  */
+	      while ((atomic_load_relaxed (&rwlock->__data.__readers)
+		  & PTHREAD_RWLOCK_RWAITING) != 0)
+		{
+		  int private = __pthread_rwlock_get_private (rwlock);
+		  int err = futex_abstimed_wait64 (&rwlock->__data.__readers,
+		      r, abstime, private);
+		  /* We ignore EAGAIN and EINTR.  On time-outs, we can just
+		     return because we don't need to clean up anything.  */
+		  if (err == ETIMEDOUT)
+		    return err;
+		}
+	      /* It makes sense to not break out of the outer loop here
+		 because we might be in the same situation again.  */
+	    }
+	  else
+	    {
+	      /* TODO Back-off.  */
+	    }
+	}
+    }
+  /* Register as a reader, using an add-and-fetch so that R can be used as
+     expected value for future operations.  Acquire MO so we synchronize with
+     prior writers as well as the last reader of the previous read phase (see
+     below).  */
+  r = atomic_fetch_add_acquire (&rwlock->__data.__readers,
+      (1 << PTHREAD_RWLOCK_READER_SHIFT)) + (1 << PTHREAD_RWLOCK_READER_SHIFT);
+
+  /* Check whether there is an overflow in the number of readers.  We assume
+     that the total number of threads is less than half the maximum number
+     of readers that we have bits for in __readers (i.e., with 32-bit int and
+     PTHREAD_RWLOCK_READER_SHIFT of 3, we assume there are less than
+     1 << (32-3-1) concurrent threads).
+     If there is an overflow, we use a CAS to try to decrement the number of
+     readers if there still is an overflow situation.  If so, we return
+     EAGAIN; if not, we are not a thread causing an overflow situation, and so
+     we just continue.  Using a fetch-add instead of the CAS isn't possible
+     because other readers might release the lock concurrently, which could
+     make us the last reader and thus responsible for handing ownership over
+     to writers (which requires a CAS too to make the decrement and ownership
+     transfer indivisible).  */
+  while (__glibc_unlikely (r >= PTHREAD_RWLOCK_READER_OVERFLOW))
+    {
+      /* Relaxed MO is okay because we just want to undo our registration and
+	 cannot have changed the rwlock state substantially if the CAS
+	 succeeds.  */
+      if (atomic_compare_exchange_weak_relaxed (&rwlock->__data.__readers, &r,
+	  r - (1 << PTHREAD_RWLOCK_READER_SHIFT)))
+	return EAGAIN;
+    }
+
+  /* We have registered as a reader, so if we are in a read phase, we have
+     acquired a read lock.  This is also the reader--reader fast-path.
+     Even if there is a primary writer, we just return.  If writers are to
+     be preferred and we are the only active reader, we could try to enter a
+     write phase to let the writer proceed.  This would be okay because we
+     cannot have acquired the lock previously as a reader (which could result
+     in deadlock if we would wait for the primary writer to run).  However,
+     this seems to be a corner case and handling it specially not be worth the
+     complexity.  */
+  if (__glibc_likely ((r & PTHREAD_RWLOCK_WRPHASE) == 0))
+    return 0;
+
+  /* If there is no primary writer but we are in a write phase, we can try
+     to install a read phase ourself.  */
+  while (((r & PTHREAD_RWLOCK_WRPHASE) != 0)
+      && ((r & PTHREAD_RWLOCK_WRLOCKED) == 0))
+    {
+       /* Try to enter a read phase: If the CAS below succeeds, we have
+	 ownership; if it fails, we will simply retry and reassess the
+	 situation.
+	 Acquire MO so we synchronize with prior writers.  */
+      if (atomic_compare_exchange_weak_acquire (&rwlock->__data.__readers, &r,
+	  r ^ PTHREAD_RWLOCK_WRPHASE))
+	{
+	  /* We started the read phase, so we are also responsible for
+	     updating the write-phase futex.  Relaxed MO is sufficient.
+	     Note that there can be no other reader that we have to wake
+	     because all other readers will see the read phase started by us
+	     (or they will try to start it themselves); if a writer started
+	     the read phase, we cannot have started it.  Furthermore, we
+	     cannot discard a PTHREAD_RWLOCK_FUTEX_USED flag because we will
+	     overwrite the value set by the most recent writer (or the readers
+	     before it in case of explicit hand-over) and we know that there
+	     are no waiting readers.  */
+	  atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 0);
+	  return 0;
+	}
+      else
+	{
+	  /* TODO Back off before retrying.  Also see above.  */
+	}
+    }
+
+  if ((r & PTHREAD_RWLOCK_WRPHASE) != 0)
+    {
+      /* We are in a write phase, and there must be a primary writer because
+	 of the previous loop.  Block until the primary writer gives up the
+	 write phase.  This case requires explicit hand-over using
+	 __wrphase_futex.
+	 However, __wrphase_futex might not have been set to 1 yet (either
+	 because explicit hand-over to the writer is still ongoing, or because
+	 the writer has started the write phase but does not yet have updated
+	 __wrphase_futex).  The least recent value of __wrphase_futex we can
+	 read from here is the modification of the last read phase (because
+	 we synchronize with the last reader in this read phase through
+	 __readers; see the use of acquire MO on the fetch_add above).
+	 Therefore, if we observe a value of 0 for __wrphase_futex, we need
+	 to subsequently check that __readers now indicates a read phase; we
+	 need to use acquire MO for this so that if we observe a read phase,
+	 we will also see the modification of __wrphase_futex by the previous
+	 writer.  We then need to load __wrphase_futex again and continue to
+	 wait if it is not 0, so that we do not skip explicit hand-over.
+	 Relaxed MO is sufficient for the load from __wrphase_futex because
+	 we just use it as an indicator for when we can proceed; we use
+	 __readers and the acquire MO accesses to it to eventually read from
+	 the proper stores to __wrphase_futex.  */
+      unsigned int wpf;
+      bool ready = false;
+      for (;;)
+	{
+	  while (((wpf = atomic_load_relaxed (&rwlock->__data.__wrphase_futex))
+	      | PTHREAD_RWLOCK_FUTEX_USED) == (1 | PTHREAD_RWLOCK_FUTEX_USED))
+	    {
+	      int private = __pthread_rwlock_get_private (rwlock);
+	      if (((wpf & PTHREAD_RWLOCK_FUTEX_USED) == 0)
+		  && !atomic_compare_exchange_weak_relaxed
+		      (&rwlock->__data.__wrphase_futex,
+		       &wpf, wpf | PTHREAD_RWLOCK_FUTEX_USED))
+		continue;
+	      int err = futex_abstimed_wait64 (&rwlock->__data.__wrphase_futex,
+		  1 | PTHREAD_RWLOCK_FUTEX_USED, abstime, private);
+	      if (err == ETIMEDOUT)
+		{
+		  /* If we timed out, we need to unregister.  If no read phase
+		     has been installed while we waited, we can just decrement
+		     the number of readers.  Otherwise, we just acquire the
+		     lock, which is allowed because we give no precise timing
+		     guarantees, and because the timeout is only required to
+		     be in effect if we would have had to wait for other
+		     threads (e.g., if futex_wait would time-out immediately
+		     because the given absolute time is in the past).  */
+		  r = atomic_load_relaxed (&rwlock->__data.__readers);
+		  while ((r & PTHREAD_RWLOCK_WRPHASE) != 0)
+		    {
+		      /* We don't need to make anything else visible to
+			 others besides unregistering, so relaxed MO is
+			 sufficient.  */
+		      if (atomic_compare_exchange_weak_relaxed
+			  (&rwlock->__data.__readers, &r,
+			   r - (1 << PTHREAD_RWLOCK_READER_SHIFT)))
+			return ETIMEDOUT;
+		      /* TODO Back-off.  */
+		    }
+		  /* Use the acquire MO fence to mirror the steps taken in the
+		     non-timeout case.  Note that the read can happen both
+		     in the atomic_load above as well as in the failure case
+		     of the CAS operation.  */
+		  atomic_thread_fence_acquire ();
+		  /* We still need to wait for explicit hand-over, but we must
+		     not use futex_wait anymore because we would just time out
+		     in this case and thus make the spin-waiting we need
+		     unnecessarily expensive.  */
+		  while ((atomic_load_relaxed (&rwlock->__data.__wrphase_futex)
+		      | PTHREAD_RWLOCK_FUTEX_USED)
+		      == (1 | PTHREAD_RWLOCK_FUTEX_USED))
+		    {
+		      /* TODO Back-off?  */
+		    }
+		  ready = true;
+		  break;
+		}
+	      /* If we got interrupted (EINTR) or the futex word does not have the
+		 expected value (EAGAIN), retry.  */
+	    }
+	  if (ready)
+	    /* See below.  */
+	    break;
+	  /* We need acquire MO here so that we synchronize with the lock
+	     release of the writer, and so that we observe a recent value of
+	     __wrphase_futex (see below).  */
+	  if ((atomic_load_acquire (&rwlock->__data.__readers)
+	      & PTHREAD_RWLOCK_WRPHASE) == 0)
+	    /* We are in a read phase now, so the least recent modification of
+	       __wrphase_futex we can read from is the store by the writer
+	       with value 1.  Thus, only now we can assume that if we observe
+	       a value of 0, explicit hand-over is finished. Retry the loop
+	       above one more time.  */
+	    ready = true;
+	}
+    }
+
+  return 0;
+}
+
 
 static __always_inline void
 __pthread_rwlock_wrunlock (pthread_rwlock_t *rwlock)
@@ -924,3 +1158,360 @@ __pthread_rwlock_wrlock_full (pthread_rwlock_t *rwlock,
       THREAD_GETMEM (THREAD_SELF, tid));
   return 0;
 }
+
+/* 64-bit time version */
+
+static __always_inline int
+__pthread_rwlock_wrlock_full64 (pthread_rwlock_t *rwlock,
+    const struct __timespec64 *abstime)
+{
+  /* Make sure we are not holding the rwlock as a writer.  This is a deadlock
+     situation we recognize and report.  */
+  if (__glibc_unlikely (atomic_load_relaxed (&rwlock->__data.__cur_writer)
+      == THREAD_GETMEM (THREAD_SELF, tid)))
+    return EDEADLK;
+
+  /* First we try to acquire the role of primary writer by setting WRLOCKED;
+     if it was set before, there already is a primary writer.  Acquire MO so
+     that we synchronize with previous primary writers.
+
+     We do not try to change to a write phase right away using a fetch_or
+     because we would have to reset it again and wake readers if there are
+     readers present (some readers could try to acquire the lock more than
+     once, so setting a write phase in the middle of this could cause
+     deadlock).  Changing to a write phase eagerly would only speed up the
+     transition from a read phase to a write phase in the uncontended case,
+     but it would slow down the contended case if readers are preferred (which
+     is the default).
+     We could try to CAS from a state with no readers to a write phase, but
+     this could be less scalable if readers arrive and leave frequently.  */
+  bool may_share_futex_used_flag = false;
+  unsigned int r = atomic_fetch_or_acquire (&rwlock->__data.__readers,
+      PTHREAD_RWLOCK_WRLOCKED);
+  if (__glibc_unlikely ((r & PTHREAD_RWLOCK_WRLOCKED) != 0))
+    {
+      /* There is another primary writer.  */
+      bool prefer_writer =
+	  (rwlock->__data.__flags != PTHREAD_RWLOCK_PREFER_READER_NP);
+      if (prefer_writer)
+	{
+	  /* We register as a waiting writer, so that we can make use of
+	     writer--writer hand-over.  Relaxed MO is fine because we just
+	     want to register.  We assume that the maximum number of threads
+	     is less than the capacity in __writers.  */
+	  atomic_fetch_add_relaxed (&rwlock->__data.__writers, 1);
+	}
+      for (;;)
+	{
+	  /* TODO Spin until WRLOCKED is 0 before trying the CAS below.
+	     But pay attention to not delay trying writer--writer hand-over
+	     for too long (which we must try eventually anyway).  */
+	  if ((r & PTHREAD_RWLOCK_WRLOCKED) == 0)
+	    {
+	      /* Try to become the primary writer or retry.  Acquire MO as in
+		 the fetch_or above.  */
+	      if (atomic_compare_exchange_weak_acquire
+		  (&rwlock->__data.__readers, &r,
+		      r | PTHREAD_RWLOCK_WRLOCKED))
+		{
+		  if (prefer_writer)
+		    {
+		      /* Unregister as a waiting writer.  Note that because we
+			 acquired WRLOCKED, WRHANDOVER will not be set.
+			 Acquire MO on the CAS above ensures that
+			 unregistering happens after the previous writer;
+			 this sorts the accesses to __writers by all
+			 primary writers in a useful way (e.g., any other
+			 primary writer acquiring after us or getting it from
+			 us through WRHANDOVER will see both our changes to
+			 __writers).
+			 ??? Perhaps this is not strictly necessary for
+			 reasons we do not yet know of.  */
+		      atomic_fetch_add_relaxed (&rwlock->__data.__writers,
+			  -1);
+		    }
+		  break;
+		}
+	      /* Retry if the CAS fails (r will have been updated).  */
+	      continue;
+	    }
+	  /* If writer--writer hand-over is available, try to become the
+	     primary writer this way by grabbing the WRHANDOVER token.  If we
+	     succeed, we own WRLOCKED.  */
+	  if (prefer_writer)
+	    {
+	      unsigned int w = atomic_load_relaxed
+		  (&rwlock->__data.__writers);
+	      if ((w & PTHREAD_RWLOCK_WRHANDOVER) != 0)
+		{
+		  /* Acquire MO is required here so that we synchronize with
+		     the writer that handed over WRLOCKED.  We also need this
+		     for the reload of __readers below because our view of
+		     __readers must be at least as recent as the view of the
+		     writer that handed over WRLOCKED; we must avoid an ABA
+		     through WRHANDOVER, which could, for example, lead to us
+		     assuming we are still in a write phase when in fact we
+		     are not.  */
+		  if (atomic_compare_exchange_weak_acquire
+		      (&rwlock->__data.__writers,
+		       &w, (w - PTHREAD_RWLOCK_WRHANDOVER - 1)))
+		    {
+		      /* Reload so our view is consistent with the view of
+			 the previous owner of WRLOCKED.  See above.  */
+		      r = atomic_load_relaxed (&rwlock->__data.__readers);
+		      break;
+		    }
+		  /* We do not need to reload __readers here.  We should try
+		     to perform writer--writer hand-over if possible; if it
+		     is not possible anymore, we will reload __readers
+		     elsewhere in this loop.  */
+		  continue;
+		}
+	    }
+	  /* We did not acquire WRLOCKED nor were able to use writer--writer
+	     hand-over, so we block on __writers_futex.  */
+	  int private = __pthread_rwlock_get_private (rwlock);
+	  unsigned int wf = atomic_load_relaxed
+	      (&rwlock->__data.__writers_futex);
+	  if (((wf & ~(unsigned int) PTHREAD_RWLOCK_FUTEX_USED) != 1)
+	      || ((wf != (1 | PTHREAD_RWLOCK_FUTEX_USED))
+		  && !atomic_compare_exchange_weak_relaxed
+		      (&rwlock->__data.__writers_futex, &wf,
+		       1 | PTHREAD_RWLOCK_FUTEX_USED)))
+	    {
+	      /* If we cannot block on __writers_futex because there is no
+		 primary writer, or we cannot set PTHREAD_RWLOCK_FUTEX_USED,
+		 we retry.  We must reload __readers here in case we cannot
+		 block on __writers_futex so that we can become the primary
+		 writer and are not stuck in a loop that just continuously
+		 fails to block on __writers_futex.  */
+	      r = atomic_load_relaxed (&rwlock->__data.__readers);
+	      continue;
+	    }
+	  /* We set the flag that signals that the futex is used, or we could
+	     have set it if we had been faster than other waiters.  As a
+	     result, we may share the flag with an unknown number of other
+	     writers.  Therefore, we must keep this flag set when we acquire
+	     the lock.  We do not need to do this when we do not reach this
+	     point here because then we are not part of the group that may
+	     share the flag, and another writer will wake one of the writers
+	     in this group.  */
+	  may_share_futex_used_flag = true;
+	  int err = futex_abstimed_wait64 (&rwlock->__data.__writers_futex,
+	      1 | PTHREAD_RWLOCK_FUTEX_USED, abstime, private);
+	  if (err == ETIMEDOUT)
+	    {
+	      if (prefer_writer)
+		{
+		  /* We need to unregister as a waiting writer.  If we are the
+		     last writer and writer--writer hand-over is available,
+		     we must make use of it because nobody else will reset
+		     WRLOCKED otherwise.  (If we use it, we simply pretend
+		     that this happened before the timeout; see
+		     pthread_rwlock_rdlock_full for the full reasoning.)
+		     Also see the similar code above.  */
+		  unsigned int w = atomic_load_relaxed
+		      (&rwlock->__data.__writers);
+		  while (!atomic_compare_exchange_weak_acquire
+		      (&rwlock->__data.__writers, &w,
+			  (w == PTHREAD_RWLOCK_WRHANDOVER + 1 ? 0 : w - 1)))
+		    {
+		      /* TODO Back-off.  */
+		    }
+		  if (w == PTHREAD_RWLOCK_WRHANDOVER + 1)
+		    {
+		      /* We must continue as primary writer.  See above.  */
+		      r = atomic_load_relaxed (&rwlock->__data.__readers);
+		      break;
+		    }
+		}
+	      /* We cleaned up and cannot have stolen another waiting writer's
+		 futex wake-up, so just return.  */
+	      return ETIMEDOUT;
+	    }
+	  /* If we got interrupted (EINTR) or the futex word does not have the
+	     expected value (EAGAIN), retry after reloading __readers.  */
+	  r = atomic_load_relaxed (&rwlock->__data.__readers);
+	}
+      /* Our snapshot of __readers is up-to-date at this point because we
+	 either set WRLOCKED using a CAS or were handed over WRLOCKED from
+	 another writer whose snapshot of __readers we inherit.  */
+    }
+
+  /* If we are in a read phase and there are no readers, try to start a write
+     phase.  */
+  while (((r & PTHREAD_RWLOCK_WRPHASE) == 0)
+      && ((r >> PTHREAD_RWLOCK_READER_SHIFT) == 0))
+    {
+      /* Acquire MO so that we synchronize with prior writers and do
+	 not interfere with their updates to __writers_futex, as well
+	 as regarding prior readers and their updates to __wrphase_futex,
+	 respectively.  */
+      if (atomic_compare_exchange_weak_acquire (&rwlock->__data.__readers,
+	  &r, r | PTHREAD_RWLOCK_WRPHASE))
+	{
+	  /* We have started a write phase, so need to enable readers to wait.
+	     See the similar case in__pthread_rwlock_rdlock_full.  */
+	  atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 1);
+	  /* Make sure we fall through to the end of the function.  */
+	  r |= PTHREAD_RWLOCK_WRPHASE;
+	  break;
+	}
+      /* TODO Back-off.  */
+    }
+
+  /* We are the primary writer; enable blocking on __writers_futex.  Relaxed
+     MO is sufficient for futex words; acquire MO on the previous
+     modifications of __readers ensures that this store happens after the
+     store of value 0 by the previous primary writer.  */
+  atomic_store_relaxed (&rwlock->__data.__writers_futex,
+      1 | (may_share_futex_used_flag ? PTHREAD_RWLOCK_FUTEX_USED : 0));
+
+  if (__glibc_unlikely ((r & PTHREAD_RWLOCK_WRPHASE) == 0))
+    {
+      /* We are not in a read phase and there are readers (because of the
+	 previous loop).  Thus, we have to wait for explicit hand-over from
+	 one of these readers.
+	 We basically do the same steps as for the similar case in
+	 __pthread_rwlock_rdlock_full, except that we additionally might try
+	 to directly hand over to another writer and need to wake up
+	 other writers or waiting readers (i.e., PTHREAD_RWLOCK_RWAITING).  */
+      unsigned int wpf;
+      bool ready = false;
+      for (;;)
+	{
+	  while (((wpf = atomic_load_relaxed (&rwlock->__data.__wrphase_futex))
+	      | PTHREAD_RWLOCK_FUTEX_USED) == PTHREAD_RWLOCK_FUTEX_USED)
+	    {
+	      int private = __pthread_rwlock_get_private (rwlock);
+	      if (((wpf & PTHREAD_RWLOCK_FUTEX_USED) == 0)
+		  && !atomic_compare_exchange_weak_relaxed
+		      (&rwlock->__data.__wrphase_futex, &wpf,
+		       PTHREAD_RWLOCK_FUTEX_USED))
+		continue;
+	      int err = futex_abstimed_wait64 (&rwlock->__data.__wrphase_futex,
+		  PTHREAD_RWLOCK_FUTEX_USED, abstime, private);
+	      if (err == ETIMEDOUT)
+		{
+		  if (rwlock->__data.__flags
+		      != PTHREAD_RWLOCK_PREFER_READER_NP)
+		    {
+		      /* We try writer--writer hand-over.  */
+		      unsigned int w = atomic_load_relaxed
+			  (&rwlock->__data.__writers);
+		      if (w != 0)
+			{
+			  /* We are about to hand over WRLOCKED, so we must
+			     release __writers_futex too; otherwise, we'd have
+			     a pending store, which could at least prevent
+			     other threads from waiting using the futex
+			     because it could interleave with the stores
+			     by subsequent writers.  In turn, this means that
+			     we have to clean up when we do not hand over
+			     WRLOCKED.
+			     Release MO so that another writer that gets
+			     WRLOCKED from us can take over our view of
+			     __readers.  */
+			  unsigned int wf = atomic_exchange_relaxed
+			      (&rwlock->__data.__writers_futex, 0);
+			  while (w != 0)
+			    {
+			      if (atomic_compare_exchange_weak_release
+				  (&rwlock->__data.__writers, &w,
+				      w | PTHREAD_RWLOCK_WRHANDOVER))
+				{
+				  /* Wake other writers.  */
+				  if ((wf & PTHREAD_RWLOCK_FUTEX_USED) != 0)
+				    futex_wake
+					(&rwlock->__data.__writers_futex, 1,
+					 private);
+				  return ETIMEDOUT;
+				}
+			      /* TODO Back-off.  */
+			    }
+			  /* We still own WRLOCKED and someone else might set
+			     a write phase concurrently, so enable waiting
+			     again.  Make sure we don't loose the flag that
+			     signals whether there are threads waiting on
+			     this futex.  */
+			  atomic_store_relaxed
+			      (&rwlock->__data.__writers_futex, wf);
+			}
+		    }
+		  /* If we timed out and we are not in a write phase, we can
+		     just stop being a primary writer.  Otherwise, we just
+		     acquire the lock.  */
+		  r = atomic_load_relaxed (&rwlock->__data.__readers);
+		  if ((r & PTHREAD_RWLOCK_WRPHASE) == 0)
+		    {
+		      /* We are about to release WRLOCKED, so we must release
+			 __writers_futex too; see the handling of
+			 writer--writer hand-over above.  */
+		      unsigned int wf = atomic_exchange_relaxed
+			  (&rwlock->__data.__writers_futex, 0);
+		      while ((r & PTHREAD_RWLOCK_WRPHASE) == 0)
+			{
+			  /* While we don't need to make anything from a
+			     caller's critical section visible to other
+			     threads, we need to ensure that our changes to
+			     __writers_futex are properly ordered.
+			     Therefore, use release MO to synchronize with
+			     subsequent primary writers.  Also wake up any
+			     waiting readers as they are waiting because of
+			     us.  */
+			  if (atomic_compare_exchange_weak_release
+			      (&rwlock->__data.__readers, &r,
+			       (r ^ PTHREAD_RWLOCK_WRLOCKED)
+			       & ~(unsigned int) PTHREAD_RWLOCK_RWAITING))
+			    {
+			      /* Wake other writers.  */
+			      if ((wf & PTHREAD_RWLOCK_FUTEX_USED) != 0)
+				futex_wake (&rwlock->__data.__writers_futex,
+				    1, private);
+			      /* Wake waiting readers.  */
+			      if ((r & PTHREAD_RWLOCK_RWAITING) != 0)
+				futex_wake (&rwlock->__data.__readers,
+				    INT_MAX, private);
+			      return ETIMEDOUT;
+			    }
+			}
+		      /* We still own WRLOCKED and someone else might set a
+			 write phase concurrently, so enable waiting again.
+			 Make sure we don't loose the flag that signals
+			 whether there are threads waiting on this futex.  */
+		      atomic_store_relaxed (&rwlock->__data.__writers_futex,
+			  wf);
+		    }
+		  /* Use the acquire MO fence to mirror the steps taken in the
+		     non-timeout case.  Note that the read can happen both
+		     in the atomic_load above as well as in the failure case
+		     of the CAS operation.  */
+		  atomic_thread_fence_acquire ();
+		  /* We still need to wait for explicit hand-over, but we must
+		     not use futex_wait anymore.  */
+		  while ((atomic_load_relaxed
+		      (&rwlock->__data.__wrphase_futex)
+		       | PTHREAD_RWLOCK_FUTEX_USED)
+		      == PTHREAD_RWLOCK_FUTEX_USED)
+		    {
+		      /* TODO Back-off.  */
+		    }
+		  ready = true;
+		  break;
+		}
+	      /* If we got interrupted (EINTR) or the futex word does not have
+		 the expected value (EAGAIN), retry.  */
+	    }
+	  /* See pthread_rwlock_rdlock_full.  */
+	  if (ready)
+	    break;
+	  if ((atomic_load_acquire (&rwlock->__data.__readers)
+	      & PTHREAD_RWLOCK_WRPHASE) != 0)
+	    ready = true;
+	}
+    }
+
+  atomic_store_relaxed (&rwlock->__data.__cur_writer,
+      THREAD_GETMEM (THREAD_SELF, tid));
+  return 0;
+}

nptl/pthread_rwlock_timedrdlock.c

@@ -35,3 +35,22 @@ pthread_rwlock_timedrdlock (pthread_rwlock_t *rwlock,
 
   return __pthread_rwlock_rdlock_full (rwlock, abstime);
 }
+
+/* 64-bit time version */
+
+int
+__pthread_rwlock_timedrdlock64 (pthread_rwlock_t *rwlock,
+    const struct __timespec64 *abstime)
+{
+  /* Make sure the passed in timeout value is valid.  Note that the previous
+     implementation assumed that this check *must* not be performed if there
+     would in fact be no blocking; however, POSIX only requires that "the
+     validity of the abstime parameter need not be checked if the lock can be
+     immediately acquired" (i.e., we need not but may check it).  */
+  /* ??? Just move this to __pthread_rwlock_rdlock_full?  */
+  if (__glibc_unlikely (abstime->tv_nsec >= 1000000000
+      || abstime->tv_nsec < 0))
+    return EINVAL;
+
+  return __pthread_rwlock_rdlock_full64 (rwlock, abstime);
+}

nptl/pthread_rwlock_timedwrlock.c

@@ -35,3 +35,22 @@ pthread_rwlock_timedwrlock (pthread_rwlock_t *rwlock,
 
   return __pthread_rwlock_wrlock_full (rwlock, abstime);
 }
+
+/* 64-bit time version */
+
+int
+__pthread_rwlock_timedwrlock64 (pthread_rwlock_t *rwlock,
+    const struct __timespec64 *abstime)
+{
+  /* Make sure the passed in timeout value is valid.  Note that the previous
+     implementation assumed that this check *must* not be performed if there
+     would in fact be no blocking; however, POSIX only requires that "the
+     validity of the abstime parameter need not be checked if the lock can be
+     immediately acquired" (i.e., we need not but may check it).  */
+  /* ??? Just move this to __pthread_rwlock_wrlock_full?  */
+  if (__glibc_unlikely (abstime->tv_nsec >= 1000000000
+      || abstime->tv_nsec < 0))
+    return EINVAL;
+
+  return __pthread_rwlock_wrlock_full64 (rwlock, abstime);
+}

nptl/sem_timedwait.c

@@ -38,3 +38,21 @@ sem_timedwait (sem_t *sem, const struct timespec *abstime)
   else
     return __new_sem_wait_slow((struct new_sem *) sem, abstime);
 }
+
+int
+__sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
+{
+  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  /* Check sem_wait.c for a more detailed explanation why it is required.  */
+  __pthread_testcancel ();
+
+  if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
+    return 0;
+  else
+    return __new_sem_wait_slow64 ((struct new_sem *) sem, abstime);
+}

nptl/sem_wait.c

@@ -43,6 +43,30 @@ __new_sem_wait (sem_t *sem)
 }
 versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1);
 
+/* 64-bit time version */
+
+int
+__new_sem_wait64 (sem_t *sem)
+{
+  /* We need to check whether we need to act upon a cancellation request here
+     because POSIX specifies that cancellation points "shall occur" in
+     sem_wait and sem_timedwait, which also means that they need to check
+     this regardless whether they block or not (unlike "may occur"
+     functions).  See the POSIX Rationale for this requirement: Section
+     "Thread Cancellation Overview" [1] and austin group issue #1076 [2]
+     for thoughs on why this may be a suboptimal design.
+
+     [1] http://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xsh_chap02.html
+     [2] http://austingroupbugs.net/view.php?id=1076 for thoughts on why this
+   */
+  __pthread_testcancel ();
+
+  if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
+    return 0;
+  else
+    return __new_sem_wait_slow64 ((struct new_sem *) sem, NULL);
+}
+
 #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1)
 int
 attribute_compat_text_section

nptl/sem_waitcommon.c

@@ -119,6 +119,24 @@ do_futex_wait (struct new_sem *sem, const struct timespec *abstime)
   return err;
 }
 
+static int
+__attribute__ ((noinline))
+do_futex_wait64 (struct new_sem *sem, const struct __timespec64 *abstime)
+{
+  int err;
+
+#if __HAVE_64B_ATOMICS
+  err = futex_abstimed_wait_cancelable64 (
+      (unsigned int *) &sem->data + SEM_VALUE_OFFSET, 0, abstime,
+      sem->private);
+#else
+  err = futex_abstimed_wait_cancelable64 (&sem->value, SEM_NWAITERS_MASK,
+					abstime, sem->private);
+#endif
+
+  return err;
+}
+
 /* Fast path: Try to grab a token without blocking.  */
 static int
 __new_sem_wait_fast (struct new_sem *sem, int definitive_result)
@@ -310,6 +328,160 @@ error:
   return err;
 }
 
+/* 64-bit time version */
+
+static int
+__attribute__ ((noinline))
+__new_sem_wait_slow64 (struct new_sem *sem, const struct __timespec64 *abstime)
+{
+  int err = 0;
+
+#if __HAVE_64B_ATOMICS
+  /* Add a waiter.  Relaxed MO is sufficient because we can rely on the
+     ordering provided by the RMW operations we use.  */
+  uint64_t d = atomic_fetch_add_relaxed (&sem->data,
+      (uint64_t) 1 << SEM_NWAITERS_SHIFT);
+
+  pthread_cleanup_push (__sem_wait_cleanup, sem);
+
+  /* Wait for a token to be available.  Retry until we can grab one.  */
+  for (;;)
+    {
+      /* If there is no token available, sleep until there is.  */
+      if ((d & SEM_VALUE_MASK) == 0)
+	{
+	  err = do_futex_wait64 (sem, abstime);
+	  /* A futex return value of 0 or EAGAIN is due to a real or spurious
+	     wake-up, or due to a change in the number of tokens.  We retry in
+	     these cases.
+	     If we timed out, forward this to the caller.
+	     EINTR is returned if we are interrupted by a signal; we
+	     forward this to the caller.  (See futex_wait and related
+	     documentation.  Before Linux 2.6.22, EINTR was also returned on
+	     spurious wake-ups; we only support more recent Linux versions,
+	     so do not need to consider this here.)  */
+	  if (err == ETIMEDOUT || err == EINTR)
+	    {
+	      __set_errno (err);
+	      err = -1;
+	      /* Stop being registered as a waiter.  */
+	      atomic_fetch_add_relaxed (&sem->data,
+		  -((uint64_t) 1 << SEM_NWAITERS_SHIFT));
+	      break;
+	    }
+	  /* Relaxed MO is sufficient; see below.  */
+	  d = atomic_load_relaxed (&sem->data);
+	}
+      else
+	{
+	  /* Try to grab both a token and stop being a waiter.  We need
+	     acquire MO so this synchronizes with all token providers (i.e.,
+	     the RMW operation we read from or all those before it in
+	     modification order; also see sem_post).  On the failure path,
+	     relaxed MO is sufficient because we only eventually need the
+	     up-to-date value; the futex_wait or the CAS perform the real
+	     work.  */
+	  if (atomic_compare_exchange_weak_acquire (&sem->data,
+	      &d, d - 1 - ((uint64_t) 1 << SEM_NWAITERS_SHIFT)))
+	    {
+	      err = 0;
+	      break;
+	    }
+	}
+    }
+
+  pthread_cleanup_pop (0);
+#else
+  /* The main difference to the 64b-atomics implementation is that we need to
+     access value and nwaiters in separate steps, and that the nwaiters bit
+     in the value can temporarily not be set even if nwaiters is nonzero.
+     We work around incorrectly unsetting the nwaiters bit by letting sem_wait
+     set the bit again and waking the number of waiters that could grab a
+     token.  There are two additional properties we need to ensure:
+     (1) We make sure that whenever unsetting the bit, we see the increment of
+     nwaiters by the other thread that set the bit.  IOW, we will notice if
+     we make a mistake.
+     (2) When setting the nwaiters bit, we make sure that we see the unsetting
+     of the bit by another waiter that happened before us.  This avoids having
+     to blindly set the bit whenever we need to block on it.  We set/unset
+     the bit while having incremented nwaiters (i.e., are a registered
+     waiter), and the problematic case only happens when one waiter indeed
+     followed another (i.e., nwaiters was never larger than 1); thus, this
+     works similarly as with a critical section using nwaiters (see the MOs
+     and related comments below).
+
+     An alternative approach would be to unset the bit after decrementing
+     nwaiters; however, that would result in needing Dekker-like
+     synchronization and thus full memory barriers.  We also would not be able
+     to prevent misspeculation, so this alternative scheme does not seem
+     beneficial.  */
+  unsigned int v;
+
+  /* Add a waiter.  We need acquire MO so this synchronizes with the release
+     MO we use when decrementing nwaiters below; it ensures that if another
+     waiter unset the bit before us, we see that and set it again.  Also see
+     property (2) above.  */
+  atomic_fetch_add_acquire (&sem->nwaiters, 1);
+
+  pthread_cleanup_push (__sem_wait_cleanup, sem);
+
+  /* Wait for a token to be available.  Retry until we can grab one.  */
+  /* We do not need any ordering wrt. to this load's reads-from, so relaxed
+     MO is sufficient.  The acquire MO above ensures that in the problematic
+     case, we do see the unsetting of the bit by another waiter.  */
+  v = atomic_load_relaxed (&sem->value);
+  do
+    {
+      do
+	{
+	  /* We are about to block, so make sure that the nwaiters bit is
+	     set.  We need release MO on the CAS to ensure that when another
+	     waiter unsets the nwaiters bit, it will also observe that we
+	     incremented nwaiters in the meantime (also see the unsetting of
+	     the bit below).  Relaxed MO on CAS failure is sufficient (see
+	     above).  */
+	  do
+	    {
+	      if ((v & SEM_NWAITERS_MASK) != 0)
+		break;
+	    }
+	  while (!atomic_compare_exchange_weak_release (&sem->value,
+	      &v, v | SEM_NWAITERS_MASK));
+	  /* If there is no token, wait.  */
+	  if ((v >> SEM_VALUE_SHIFT) == 0)
+	    {
+	      /* See __HAVE_64B_ATOMICS variant.  */
+	      err = do_futex_wait64 (sem, abstime);
+	      if (err == ETIMEDOUT || err == EINTR)
+		{
+		  __set_errno (err);
+		  err = -1;
+		  goto error;
+		}
+	      err = 0;
+	      /* We blocked, so there might be a token now.  Relaxed MO is
+		 sufficient (see above).  */
+	      v = atomic_load_relaxed (&sem->value);
+	    }
+	}
+      /* If there is no token, we must not try to grab one.  */
+      while ((v >> SEM_VALUE_SHIFT) == 0);
+    }
+  /* Try to grab a token.  We need acquire MO so this synchronizes with
+     all token providers (i.e., the RMW operation we read from or all those
+     before it in modification order; also see sem_post).  */
+  while (!atomic_compare_exchange_weak_acquire (&sem->value,
+      &v, v - (1 << SEM_VALUE_SHIFT)));
+
+error:
+  pthread_cleanup_pop (0);
+
+  __sem_wait_32_finish (sem);
+#endif
+
+  return err;
+}
+
 /* Stop being a registered waiter (non-64b-atomics code only).  */
 #if !__HAVE_64B_ATOMICS
 static void

posix/Makefile

@@ -62,7 +62,8 @@ routines :=								      \
 	spawnattr_getsigmask spawnattr_getschedpolicy spawnattr_getschedparam \
 	spawnattr_setsigmask spawnattr_setschedpolicy spawnattr_setschedparam \
 	posix_madvise							      \
-	get_child_max sched_cpucount sched_cpualloc sched_cpufree
+	get_child_max sched_cpucount sched_cpualloc sched_cpufree	      \
+	sched_rr_gi64 nanosleep64
 
 aux		:= init-posix environ
 tests		:= test-errno tstgetopt testfnm runtests runptests \

posix/Versions

@@ -137,6 +137,10 @@ libc {
   GLIBC_2.27 {
     glob; glob64;
   }
+  GLIBC_2.29 {
+    __sched_rr_get_interval_time64;
+    __nanosleep64;
+  }
   GLIBC_PRIVATE {
     __libc_fork; __libc_pread; __libc_pwrite;
     __nanosleep_nocancel; __pause_nocancel;

posix/bits/types.h

@@ -25,6 +25,7 @@
 
 #include <features.h>
 #include <bits/wordsize.h>
+#include <bits/timesize.h>
 
 /* Convenience types.  */
 typedef unsigned char __u_char;
@@ -138,6 +139,7 @@ __extension__ typedef unsigned long long int __uintmax_t;
 # error
 #endif
 #include <bits/typesizes.h>	/* Defines __*_T_TYPE macros.  */
+#include <bits/time64.h>	/* Defines __TIME*_T_TYPE macros.  */
 
 
 __STD_TYPE __DEV_T_TYPE __dev_t;	/* Type of device numbers.  */
@@ -211,6 +213,12 @@ __STD_TYPE __U32_TYPE __socklen_t;
    It is not currently necessary for this to be machine-specific.  */
 typedef int __sig_atomic_t;
 
+#if __TIMESIZE == 64
+# define __time64_t __time_t
+#else
+__STD_TYPE __TIME64_T_TYPE __time64_t;	/* Seconds since the Epoch.  */
+#endif
+
 #undef __STD_TYPE
 
 #endif /* bits/types.h */

posix/nanosleep64.c

@@ -0,0 +1,56 @@
+/* Pause execution for a number of nanoseconds
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <time.h>
+
+/* Pause execution for a number of nanoseconds.  */
+int
+__nanosleep64 (const struct __timespec64 *requested_time,
+	         struct __timespec64 *remaining)
+{
+  struct timespec treq32, *treqp32 = NULL;
+  struct timespec trem32, *tremp32 = NULL;
+
+  if (requested_time)
+    {
+      if (requested_time->tv_sec > INT_MAX)
+        {
+          __set_errno(EOVERFLOW);
+          return -1;
+        }
+      treq32.tv_sec = requested_time->tv_sec;
+      treq32.tv_nsec = requested_time->tv_nsec;
+      treqp32 = & treq32;
+    }
+
+  if (remaining)
+    tremp32 = &trem32;
+
+  int result = __nanosleep(treqp32, tremp32);
+
+  if (result == 1 && errno == EINTR && remaining)
+    {
+      remaining->tv_sec = trem32.tv_sec;
+      remaining->tv_nsec = trem32.tv_nsec;
+      remaining->tv_pad = 0;
+    }
+
+  return result;
+}

posix/sched.h

@@ -74,6 +74,15 @@ extern int sched_get_priority_max (int __algorithm) __THROW;
 extern int sched_get_priority_min (int __algorithm) __THROW;
 
 /* Get the SCHED_RR interval for the named process.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (sched_rr_get_interval,
+                       (__pid_t __pid, struct timespec *__t),
+                       __sched_rr_get_interval_time64) __THROW;
+# else
+# define sched_rr_get_interval __sched_rr_get_interval_time64
+# endif
+#endif
 extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
 
 

posix/sched_rr_gi64.c

@@ -0,0 +1,55 @@
+/* Get the SCHED_RR interval for the named process.
+  
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sched.h>
+#include <sys/types.h>
+#include <y2038-support.h>
+
+int
+__sched_rr_get_interval_time64 (pid_t pid, struct __timespec64 *t)
+{
+  struct timespec ts32;
+  int result;
+
+  if (t == NULL)
+    {
+      __set_errno(EINVAL);
+      return -1;
+    }
+
+#ifdef __NR_sched_rr_get_interval_time64
+  if (__y2038_linux_support > 0)
+    {
+      result = INLINE_SYSCALL(sched_rr_get_interval_time64, 2, pid, t);
+      if (result == 0 || errno != ENOSYS)
+        return result;
+      __y2038_linux_support = -1;
+    }
+#endif
+
+  result = __sched_rr_get_interval(pid, &ts32);
+  if (result == 0)
+    {
+      t->tv_sec = ts32.tv_sec;
+      t->tv_nsec = ts32.tv_nsec;
+      t->tv_pad = 0;
+    }
+  return result;
+}

resource/Makefile

@@ -23,7 +23,7 @@ headers	  := sys/resource.h bits/resource.h sys/vlimit.h sys/vtimes.h	\
 	     ulimit.h bits/types/struct_rusage.h
 
 routines := getrlimit setrlimit getrlimit64 setrlimit64 getrusage ulimit      \
-	    vlimit vtimes getpriority setpriority nice
+	    vlimit vtimes getpriority setpriority nice getrusage64
 
 tests = tst-getrlimit bug-ulimit1
 

resource/Versions

@@ -22,6 +22,9 @@ libc {
     # s*
     setrlimit64;
   }
+  GLIBC_2.29 {
+    __getrusage64;
+  }
   GLIBC_PRIVATE {
     __getrlimit;
   }

resource/bits/types/struct_rusage.h

@@ -21,6 +21,7 @@
 
 #include <bits/types.h>
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 
 /* Structure which says how much of each resource has been used.  If
    the system does not keep track of a particular value, the struct

resource/getrusage64.c

@@ -0,0 +1,181 @@
+/* Return resource usage for the current process.
+   
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sys/resource.h>
+#include <include/time.h>
+#include <sysdep.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+/* Structure which says how much of each resource has been used.  */
+/* 64-bit time version */
+/* The purpose of all the unions is to have the kernel-compatible layout
+   while keeping the API type as 'long int', and among machines where
+   __syscall_slong_t is not 'long int', this only does the right thing
+   for little-endian ones, like x32.  */
+struct __rusage64
+  {
+    /* Total amount of user time used.  */
+    struct __timeval64 ru_utime;
+    /* Total amount of system time used.  */
+    struct __timeval64 ru_stime;
+    /* Maximum resident set size (in kilobytes).  */
+    __extension__ union
+      {
+	long int ru_maxrss;
+	__syscall_slong_t __ru_maxrss_word;
+      };
+    /* Amount of sharing of text segment memory
+       with other processes (kilobyte-seconds).  */
+    /* Maximum resident set size (in kilobytes).  */
+    __extension__ union
+      {
+	long int ru_ixrss;
+	__syscall_slong_t __ru_ixrss_word;
+      };
+    /* Amount of data segment memory used (kilobyte-seconds).  */
+    __extension__ union
+      {
+	long int ru_idrss;
+	__syscall_slong_t __ru_idrss_word;
+      };
+    /* Amount of stack memory used (kilobyte-seconds).  */
+    __extension__ union
+      {
+	long int ru_isrss;
+	 __syscall_slong_t __ru_isrss_word;
+      };
+    /* Number of soft page faults (i.e. those serviced by reclaiming
+       a page from the list of pages awaiting reallocation.  */
+    __extension__ union
+      {
+	long int ru_minflt;
+	__syscall_slong_t __ru_minflt_word;
+      };
+    /* Number of hard page faults (i.e. those that required I/O).  */
+    __extension__ union
+      {
+	long int ru_majflt;
+	__syscall_slong_t __ru_majflt_word;
+      };
+    /* Number of times a process was swapped out of physical memory.  */
+    __extension__ union
+      {
+	long int ru_nswap;
+	__syscall_slong_t __ru_nswap_word;
+      };
+    /* Number of input operations via the file system.  Note: This
+       and `ru_oublock' do not include operations with the cache.  */
+    __extension__ union
+      {
+	long int ru_inblock;
+	__syscall_slong_t __ru_inblock_word;
+      };
+    /* Number of output operations via the file system.  */
+    __extension__ union
+      {
+	long int ru_oublock;
+	__syscall_slong_t __ru_oublock_word;
+      };
+    /* Number of IPC messages sent.  */
+    __extension__ union
+      {
+	long int ru_msgsnd;
+	__syscall_slong_t __ru_msgsnd_word;
+      };
+    /* Number of IPC messages received.  */
+    __extension__ union
+      {
+	long int ru_msgrcv;
+	__syscall_slong_t __ru_msgrcv_word;
+      };
+    /* Number of signals delivered.  */
+    __extension__ union
+      {
+	long int ru_nsignals;
+	__syscall_slong_t __ru_nsignals_word;
+      };
+    /* Number of voluntary context switches, i.e. because the process
+       gave up the process before it had to (usually to wait for some
+       resource to be available).  */
+    __extension__ union
+      {
+	long int ru_nvcsw;
+	__syscall_slong_t __ru_nvcsw_word;
+      };
+    /* Number of involuntary context switches, i.e. a higher priority process
+       became runnable or the current process used up its time slice.  */
+    __extension__ union
+      {
+	long int ru_nivcsw;
+	__syscall_slong_t __ru_nivcsw_word;
+      };
+  };
+
+int __getrusage64 (__rusage_who_t __who, struct __rusage64 *__usage)
+{
+  int result;
+  struct rusage usage32;
+
+  result = INLINE_SYSCALL(getrusage, 2, __who, &usage32);
+  /* Copy fields from 32-bit into 64-bit rusage structure */
+  /* Total amount of user time used.  */
+  __usage->ru_utime.tv_sec = usage32.ru_utime.tv_sec;
+  __usage->ru_utime.tv_usec = usage32.ru_utime.tv_usec;
+  /* Total amount of system time used.  */
+  __usage->ru_stime.tv_sec = usage32.ru_stime.tv_sec;
+  __usage->ru_stime.tv_usec = usage32.ru_stime.tv_usec;
+  /* Maximum resident set size (in kilobytes).  */
+  __usage->ru_maxrss = usage32.ru_maxrss;
+  /* Amount of sharing of text segment memory
+     with other processes (kilobyte-seconds).  */
+  /* Maximum resident set size (in kilobytes).  */
+  __usage->ru_ixrss = usage32.ru_ixrss;
+  /* Amount of data segment memory used (kilobyte-seconds).  */
+  __usage->ru_idrss = usage32.ru_idrss;
+  /* Amount of stack memory used (kilobyte-seconds).  */
+  __usage->ru_isrss = usage32.ru_isrss;
+  /* Number of soft page faults (i.e. those serviced by reclaiming
+     a page from the list of pages awaiting reallocation.  */
+  __usage->ru_minflt = usage32.ru_minflt;
+  /* Number of hard page faults (i.e. those that required I/O).  */
+  __usage->ru_majflt = usage32.ru_majflt;
+  /* Number of times a process was swapped out of physical memory.  */
+  __usage->ru_nswap = usage32.ru_nswap;
+  /* Number of input operations via the file system.  Note: This
+     and `ru_oublock' do not include operations with the cache.  */
+  __usage->ru_inblock = usage32.ru_inblock;
+  /* Number of output operations via the file system.  */
+  __usage->ru_oublock = usage32.ru_oublock;
+  /* Number of IPC messages sent.  */
+  __usage->ru_msgsnd = usage32.ru_msgsnd;
+  /* Number of IPC messages received.  */
+  __usage->ru_msgrcv = usage32.ru_msgrcv;
+  /* Number of signals delivered.  */
+  __usage->ru_nsignals = usage32.ru_nsignals;
+  /* Number of voluntary context switches, i.e. because the process
+     gave up the process before it had to (usually to wait for some
+     resource to be available).  */
+  __usage->ru_nvcsw = usage32.ru_nvcsw;
+  /* Number of involuntary context switches, i.e. a higher priority process
+     became runnable or the current process used up its time slice.  */
+  __usage->ru_nivcsw = usage32.ru_nivcsw;
+
+  return result;
+}

resource/sys/resource.h

@@ -84,6 +84,15 @@ extern int setrlimit64 (__rlimit_resource_t __resource,
 
 /* Return resource usage information on process indicated by WHO
    and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (getrusage, (__rusage_who_t __who,
+				   struct rusage *__usage),
+     __getrusage64) __THROW;
+# else
+# define getrusage __getrusage64
+# endif
+#endif
 extern int getrusage (__rusage_who_t __who, struct rusage *__usage) __THROW;
 
 /* Return the highest priority of any process specified by WHICH and WHO

rt/Makefile

@@ -32,11 +32,13 @@ clock-routines := get_clockfreq clock_getcpuclockid			\
 		  clock_getres clock_gettime clock_settime		\
 		  clock_nanosleep
 timer-routines := timer_create timer_delete timer_getoverr		\
-		  timer_gettime timer_settime
+		  timer_gettime timer_settime                           \
+		  timerfd_gettime64 timerfd_settime64
 shm-routines   := shm_open shm_unlink
 mq-routines    := mq_open mq_close mq_unlink mq_getattr mq_setattr	\
 		  mq_notify mq_send mq_receive mq_timedsend		\
-		  mq_timedreceive
+		  mq_timedreceive					\
+		  mq_timedreceiv_time64 mq_timedsend_time64
 
 routines = $(clock-routines)
 

rt/Versions

@@ -37,4 +37,13 @@ librt {
   GLIBC_2.7 {
    __mq_open_2;
   }
+  GLIBC_2.29 {
+   __timer_gettime64;
+   __timer_settime64;
+   __timerfd_gettime64;
+   __timerfd_settime64;
+   __mq_timedreceive64;
+   __mq_timedsend_time64;
+   __aio_suspend64;
+  }
 }

rt/mq_timedreceiv_time64.c

@@ -0,0 +1,54 @@
+/* Receive the oldest from highest priority messages in message queue
+   MQDES, stop waiting if ABS_TIMEOUT expires.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <mqueue.h>
+#include <y2038-support.h>
+
+/* 64-bit time version */
+
+ssize_t
+__mq_timedreceiv_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
+			 unsigned int *__restrict msg_prio,
+			 const struct __timespec64 *__restrict abs_timeout)
+{
+  struct timespec ts32, *tsp32 = NULL;
+
+#ifdef __NR_timedreceiv_time64
+  int result;
+
+  if (__y2038_get_kernel_support () > 0)
+    {
+      result = INLINE_SYSCALL (mq_timedreceiv_time64, 5, mqdes, msg_ptr, msg_len,
+			       msg_prio, abs_timeout);
+      if (result == 0 || errno != ENOSYS)
+	return result;
+      __y2038_set_kernel_support (-1);
+    }
+#endif
+
+  if (abs_timeout)
+    {
+      ts32.tv_sec = abs_timeout->tv_sec;
+      ts32.tv_nsec = abs_timeout->tv_nsec;
+      tsp32 = &ts32;
+    }
+  return mq_timedreceive(mqdes, msg_ptr, msg_len, msg_prio, tsp32);
+}

rt/mq_timedsend_time64.c

@@ -0,0 +1,52 @@
+/* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
+   on full message queue if ABS_TIMEOUT expires.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <mqueue.h>
+#include <y2038-support.h>
+
+/* 64-bit time version */
+
+int
+__mq_timedsend_time64 (mqd_t mqdes, const char *msg_ptr, size_t msg_len,
+		  unsigned int msg_prio, const struct __timespec64 *abs_timeout)
+{
+  struct timespec ts32, *tsp32 = NULL;
+#ifdef __NR_mq_timedsend_time64
+  int result;
+  
+  if (__y2038_get_kernel_support () > 0)
+    {
+      result = INLINE_SYSCALL (mq_timedsend_time64, 5, mqdes, msg_ptr,
+			       msg_len, msg_prio, abs_timeout);
+      if (result == 0 || errno != ENOSYS)
+        return result;
+      __y2038_set_kernel_support (-1);
+    }
+#endif
+
+  if (abs_timeout)
+    {
+      ts32.tv_sec = abs_timeout->tv_sec;
+      ts32.tv_nsec = abs_timeout->tv_nsec;
+      tsp32 = &ts32;
+    }
+  return mq_timedsend(mqdes, msg_ptr, msg_len, msg_prio, tsp32);
+}

rt/mqueue.h

@@ -73,6 +73,17 @@ extern int mq_send (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len,
 #ifdef __USE_XOPEN2K
 /* Receive the oldest from highest priority messages in message queue
    MQDES, stop waiting if ABS_TIMEOUT expires.  */
+# ifdef __USE_TIME_BITS64
+#  if defined(__REDIRECT)
+extern ssize_t __REDIRECT (mq_timedreceive, (mqd_t __mqdes,
+                           char *__restrict __msg_ptr, size_t __msg_len,
+                           unsigned int *__restrict __msg_prio,
+                           const struct timespec *__restrict __abs_timeout),
+     __mq_timedreceive64) __nonnull((2, 5));
+#  else
+#   define mq_timedreceive __mq_timedreceive64
+#  endif
+# endif
 extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr,
 				size_t __msg_len,
 				unsigned int *__restrict __msg_prio,
@@ -81,6 +92,17 @@ extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr,
 
 /* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
    on full message queue if ABS_TIMEOUT expires.  */
+# ifdef __USE_TIME_BITS64
+#  if defined(__REDIRECT)
+extern int __REDIRECT (mq_timedsend, (mqd_t __mqdes,
+                       const char *__msg_ptr, size_t __msg_len,
+                       unsigned int __msg_prio,
+                       const struct timespec *__abs_timeout),
+     __mq_timedsend64) __nonnull((2, 5));
+#  else
+#   define mq_timedsend __mq_timedsend64
+#  endif
+# endif
 extern int mq_timedsend (mqd_t __mqdes, const char *__msg_ptr,
 			 size_t __msg_len, unsigned int __msg_prio,
 			 const struct timespec *__abs_timeout)

rt/timerfd_gettime64.c

@@ -0,0 +1,29 @@
+/* Get current value of timer TIMERID and store it in VALUE.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <time.h>
+
+int
+__timerfd_gettime64 (int fd, struct itimerspec *value)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__timerfd_gettime64)

rt/timerfd_settime64.c

@@ -0,0 +1,30 @@
+/* Set timer TIMERID to VALUE, returning old value in OVALUE.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <time.h>
+
+int
+__timerfd_settime64 (int fd, int flags, const struct itimerspec *value,
+	       struct itimerspec *ovalue)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__timerfd_settime64)

signal/signal.h

@@ -266,6 +266,16 @@ extern int sigwaitinfo (const sigset_t *__restrict __set,
 
    This function is a cancellation point and therefore not marked with
    __THROW.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (sigtimedwait, (const sigset_t *__restrict __set,
+			 siginfo_t *__restrict __info,
+			 const struct timespec *__restrict __timeout),
+     __sigtimedwait64) __nonnull ((1));
+# else
+# define sigtimedwait __sigtimedwait64
+# endif
+#endif
 extern int sigtimedwait (const sigset_t *__restrict __set,
 			 siginfo_t *__restrict __info,
 			 const struct timespec *__restrict __timeout)

signal/sigtimedwait.c

@@ -30,3 +30,13 @@ libc_hidden_def (__sigtimedwait)
 weak_alias (__sigtimedwait, sigtimedwait)
 
 stub_warning (sigtimedwait)
+
+int
+__sigtimedwait_time64 (const sigset_t *set, siginfo_t *info,
+		const struct __timespec64 *timeout)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+stub_warning (__sigtimedwait_time64)

stdlib/Makefile

@@ -29,7 +29,7 @@ headers	:= stdlib.h bits/stdlib.h bits/stdlib-ldbl.h bits/stdlib-float.h      \
 	   ucontext.h sys/ucontext.h bits/indirect-return.h		      \
 	   alloca.h fmtmsg.h						      \
 	   bits/stdlib-bsearch.h sys/random.h bits/stdint-intn.h	      \
-	   bits/stdint-uintn.h
+	   bits/stdint-uintn.h bits/time64.h				      \
 
 routines	:=							      \
 	atof atoi atol atoll						      \

sunrpc/clnt_udp.c

@@ -644,3 +644,40 @@ clntudp_destroy (CLIENT *cl)
   mem_free ((caddr_t) cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz));
   mem_free ((caddr_t) cl, sizeof (CLIENT));
 }
+
+/* 64-bit time versions */
+
+CLIENT *
+__clntudp_create64 (struct sockaddr_in *raddr, u_long program, u_long version,
+		    struct __timeval64 wait, int *sockp)
+{
+  struct timeval wait32;
+
+  if (wait.tv_sec > INT32_MAX || wait.tv_sec < INT32_MIN)
+  {
+    return NULL;
+  }  
+
+  wait32.tv_sec = wait.tv_sec;
+  wait32.tv_usec = wait.tv_usec;
+
+  return clntudp_create (raddr, program, version, wait32, sockp);
+}
+
+CLIENT *
+__clntudp_bufcreate64 (struct sockaddr_in *raddr, u_long program, u_long version,
+		       struct __timeval64 wait, int *sockp, u_int sendsz,
+		       u_int recvsz)
+{
+  struct timeval wait32;
+
+  if (wait.tv_sec > INT_MAX)
+  {
+    return NULL;
+  }
+
+  wait32.tv_sec = wait.tv_sec;
+  wait32.tv_usec = wait.tv_usec;
+
+  return clntudp_bufcreate (raddr, program, version, wait32, sockp, sendsz, recvsz);
+}

sunrpc/pmap_rmt.c

@@ -390,3 +390,26 @@ done_broad:
   return stat;
 }
 libc_hidden_nolink_sunrpc (clnt_broadcast, GLIBC_2_0)
+
+/* 64-bit-time version */
+
+/* The 64-bit-time version of pmap_rmtcall.
+ * Only handles 64-bit-time timeouts smaller than 2^^31 seconds.
+ */
+enum clnt_stat
+__pmap_rmtcall64 (struct sockaddr_in *addr, u_long prog, u_long vers,
+		  u_long proc, xdrproc_t xdrargs, caddr_t argsp,
+		  xdrproc_t xdrres, caddr_t resp,
+		  struct __timeval64 tout, u_long *port_ptr)
+{
+  struct timeval tout32;
+  if (tout.tv_sec > INT_MAX)
+  {
+    return RPC_SYSTEMERROR;
+  }
+  tout32.tv_sec = tout.tv_sec;
+  tout32.tv_usec = tout.tv_usec;
+  
+  return pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres,
+                       resp, tout32, port_ptr);
+}

sunrpc/rpc/clnt.h

@@ -329,9 +329,33 @@ extern CLIENT *clnttcp_create (struct sockaddr_in *__raddr, u_long __prog,
  *	u_int sendsz;
  *	u_int recvsz;
  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern CLIENT * __REDIRECT (clntudp_create,(struct sockaddr_in *__raddr,
+                                            u_long __program,
+					    u_long __version,
+					    struct timeval __wait_resend,
+					    int *__sockp),
+                            __clntudp_create64) __THROW;
+# else
+# define clntudp_create __clntudp_create64
+# endif
+#endif
 extern CLIENT *clntudp_create (struct sockaddr_in *__raddr, u_long __program,
 			       u_long __version, struct timeval __wait_resend,
 			       int *__sockp) __THROW;
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern CLIENT * __REDIRECT (clntudp_bufcreate,(struct sockaddr_in *__raddr,
+				               u_long __program, u_long __version,
+				               struct __timeval64 __wait_resend,
+					       int *__sockp, u_int __sendsz,
+					       u_int __recvsz),
+                            __clntudp_bufcreate64) __THROW;
+# else
+# define clntudp_bufcreate __clntudp_bufcreate64
+# endif
+#endif
 extern CLIENT *clntudp_bufcreate (struct sockaddr_in *__raddr,
 				  u_long __program, u_long __version,
 				  struct timeval __wait_resend, int *__sockp,

sunrpc/rpc/pmap_clnt.h

@@ -71,6 +71,21 @@ extern bool_t pmap_set (const u_long __program, const u_long __vers,
 extern bool_t pmap_unset (const u_long __program, const u_long __vers)
      __THROW;
 extern struct pmaplist *pmap_getmaps (struct sockaddr_in *__address) __THROW;
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern enum clnt_stat __REDIRECT (pmap_rmtcall, (struct sockaddr_in *__addr,
+                                                 const u_long __prog,
+                                                 const u_long __vers,
+                                                 const u_long __proc,
+                                                 xdrproc_t __xdrargs,
+                                                 caddr_t __argsp, xdrproc_t __xdrres,
+                                                 caddr_t __resp, struct timeval __tout,
+                                                 u_long *__port_ptr),
+                                  __pmap_rmtcall64) __THROW;
+# else
+# define pmap_rmtcall __pmap_rmtcall64
+# endif
+#endif
 extern enum clnt_stat pmap_rmtcall (struct sockaddr_in *__addr,
 				    const u_long __prog,
 				    const u_long __vers,

sysdeps/nptl/aio_misc.h

@@ -71,4 +71,43 @@
       }									      \
   } while (0)
 
+#define AIO_MISC_WAIT_T64(result, futex, timeout, cancel)		      \
+  do {									      \
+    volatile unsigned int *futexaddr = &futex;				      \
+    unsigned int oldval = futex;					      \
+									      \
+    if (oldval != 0)							      \
+      {									      \
+	pthread_mutex_unlock (&__aio_requests_mutex);			      \
+									      \
+	int oldtype;							      \
+	if (cancel)							      \
+	  oldtype = LIBC_CANCEL_ASYNC ();				      \
+									      \
+	int status;							      \
+	do								      \
+	  {								      \
+	    status = futex_reltimed_wait64 ((unsigned int *) futexaddr,     \
+					      oldval, timeout, FUTEX_PRIVATE);\
+	    if (status != EAGAIN)					      \
+	      break;							      \
+									      \
+	    oldval = *futexaddr;					      \
+	  }								      \
+	while (oldval != 0);						      \
+									      \
+	if (cancel)							      \
+	  LIBC_CANCEL_RESET (oldtype);					      \
+									      \
+	if (status == EINTR)						      \
+	  result = EINTR;						      \
+	else if (status == ETIMEDOUT)					      \
+	  result = EAGAIN;						      \
+	else								      \
+	  assert (status == 0 || status == EAGAIN);			      \
+									      \
+	pthread_mutex_lock (&__aio_requests_mutex);			      \
+      }									      \
+  } while (0)
+
 #include_next <aio_misc.h>

sysdeps/nptl/lowlevellock.h

@@ -122,6 +122,10 @@ extern void __lll_lock_wait (int *futex, int private) attribute_hidden;
 extern int __lll_timedlock_wait (int *futex, const struct timespec *,
 				 int private) attribute_hidden;
 
+extern int __lll_timedlock_wait64 (int *futex,
+                                     const struct __timespec64 *,
+				     int private) attribute_hidden;
+
 
 /* As __lll_lock, but with a timeout.  If the timeout occurs then return
    ETIMEDOUT.  If ABSTIME is invalid, return EINVAL.  */
@@ -138,6 +142,19 @@ extern int __lll_timedlock_wait (int *futex, const struct timespec *,
 #define lll_timedlock(futex, abstime, private)  \
   __lll_timedlock (&(futex), abstime, private)
 
+#define __lll_timedlock64(futex, abstime, private)                \
+  ({                                                                \
+    int *__futex = (futex);                                         \
+    int __val = 0;                                                  \
+                                                                    \
+    if (__glibc_unlikely                                            \
+        (atomic_compare_and_exchange_bool_acq (__futex, 1, 0)))     \
+      __val = __lll_timedlock_wait64 (__futex, abstime, private); \
+    __val;                                                          \
+  })
+#define lll_timedlock64(futex, abstime, private)  \
+  __lll_timedlock64 (&(futex), abstime, private)
+
 
 /* This is an expression rather than a statement even though its value is
    void, so that it can be used in a comma expression or as an expression

sysdeps/nptl/pthread.h

@@ -765,6 +765,17 @@ extern int pthread_mutex_lock (pthread_mutex_t *__mutex)
 
 #ifdef __USE_XOPEN2K
 /* Wait until lock becomes available, or specified time passes. */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (pthread_mutex_timedlock,
+		       (pthread_mutex_t *__restrict __mutex,
+			const struct timespec *__restrict __abstime),
+		       __pthread_mutex_timedlock64)
+	__THROWNL __nonnull ((1, 2));
+# else
+# define pthread_mutex_timedlock __pthread_mutex_timedlock64
+# endif
+#endif
 extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex,
 				    const struct timespec *__restrict
 				    __abstime) __THROWNL __nonnull ((1, 2));
@@ -904,6 +915,17 @@ extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock)
 
 # ifdef __USE_XOPEN2K
 /* Try to acquire read lock for RWLOCK or return after specfied time.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (pthread_rwlock_timedrdlock,
+		       (pthread_rwlock_t *__restrict __rwlock,
+			const struct timespec *__restrict __abstime),
+		       __pthread_rwlock_timedrdlock64)
+	__THROWNL __nonnull ((1, 2));
+# else
+# define pthread_rwlock_timedrdlock __pthread_rwlock_timedrdlock64
+# endif
+#endif
 extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock,
 				       const struct timespec *__restrict
 				       __abstime) __THROWNL __nonnull ((1, 2));
@@ -919,6 +941,17 @@ extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock)
 
 # ifdef __USE_XOPEN2K
 /* Try to acquire write lock for RWLOCK or return after specfied time.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (pthread_rwlock_timedwrlock,
+		       (pthread_rwlock_t *__restrict __rwlock,
+			const struct timespec *__restrict __abstime),
+		       __pthread_rwlock_timedwrlock64)
+	__THROWNL __nonnull ((1, 2));
+# else
+# define pthread_rwlock_timedwrlock __pthread_rwlock_timedwrlock64
+# endif
+#endif
 extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock,
 				       const struct timespec *__restrict
 				       __abstime) __THROWNL __nonnull ((1, 2));
@@ -998,6 +1031,18 @@ extern int pthread_cond_wait (pthread_cond_t *__restrict __cond,
 
    This function is a cancellation point and therefore not marked with
    __THROW.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern int __REDIRECT (pthread_cond_timedwait,
+		       (pthread_cond_t *__restrict __cond,
+			pthread_mutex_t *__restrict __mutex,
+			const struct timespec *__restrict __abstime),
+		       __pthread_cond_timedwait64)
+	__nonnull ((1, 2, 3));
+# else
+# define pthread_cond_timedwait __pthread_cond_timedwait64
+# endif
+#endif
 extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond,
 				   pthread_mutex_t *__restrict __mutex,
 				   const struct timespec *__restrict __abstime)

sysdeps/posix/clock_getres.c

@@ -23,12 +23,11 @@
 #include <sys/param.h>
 #include <libc-internal.h>
 
-
 #if HP_TIMING_AVAIL
 static long int nsec;		/* Clock frequency of the processor.  */
 
 static int
-hp_timing_getres (struct timespec *res)
+hp_timing_getres (struct __timespec64 *res)
 {
   if (__glibc_unlikely (nsec == 0))
     {
@@ -56,7 +55,7 @@ hp_timing_getres (struct timespec *res)
 #endif
 
 static inline int
-realtime_getres (struct timespec *res)
+realtime_getres (struct __timespec64 *res)
 {
   long int clk_tck = __sysconf (_SC_CLK_TCK);
 
@@ -73,17 +72,16 @@ realtime_getres (struct timespec *res)
   return -1;
 }
 
-
 /* Get resolution of clock.  */
 int
-__clock_getres (clockid_t clock_id, struct timespec *res)
+__clock_getres_time64 (clockid_t clock_id, struct __timespec64 *res)
 {
   int retval = -1;
 
   switch (clock_id)
     {
-#ifdef SYSDEP_GETRES
-      SYSDEP_GETRES;
+#ifdef SYSDEP_GETRES64
+      SYSDEP_GETRES64;
 #endif
 
 #ifndef HANDLED_REALTIME
@@ -93,8 +91,8 @@ __clock_getres (clockid_t clock_id, struct timespec *res)
 #endif	/* handled REALTIME */
 
     default:
-#ifdef SYSDEP_GETRES_CPU
-      SYSDEP_GETRES_CPU;
+#ifdef SYSDEP_GETRES_CPU64
+      SYSDEP_GETRES_CPU64;
 #endif
 #if HP_TIMING_AVAIL
       if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
@@ -115,4 +113,19 @@ __clock_getres (clockid_t clock_id, struct timespec *res)
 
   return retval;
 }
+
+int
+__clock_getres (clockid_t clock_id, struct timespec *res)
+{
+  struct __timespec64 ts64;
+  int retval = __clock_getres_time64 (clock_id, &ts64);
+  if (retval == 0)
+    {
+      // We assume we never run with a CPU clock period greater than
+      // 2**31 seconds and therefore we do not check the seconds field
+      res->tv_sec = ts64.tv_sec;
+      res->tv_nsec = ts64.tv_nsec;
+    }
+  return retval;
+}
 weak_alias (__clock_getres, clock_getres)

sysdeps/posix/time64.c

@@ -0,0 +1,43 @@
+/* Get the 64-bit current time
+ * 
+   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>		/* For NULL.  */
+#include <time.h>
+#include <sys/time.h>
+
+
+/* Return the current time as a `time_t' and also put it in *T if T is
+   not NULL.  Time is represented as seconds from Jan 1 00:00:00 1970.  */
+
+__time64_t
+__time64 (__time64_t *t)
+{
+  struct __timeval64 tv;
+  __time64_t result;
+
+  if (__gettimeofday64 (&tv, (struct timezone *) NULL))
+    result = (__time64_t) -1;
+  else
+    result = tv.tv_sec;
+
+  if (t != NULL)
+    *t = result;
+
+  return result;
+}

sysdeps/posix/utime64.c

@@ -0,0 +1,46 @@
+/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <errno.h>
+#include <utime.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+
+/* Set the access and modification times of FILE to those given in TIMES.
+   If TIMES is NULL, set them to the current time.  */
+int
+__utime64 (const char *file, const struct __utimbuf64 *times)
+{
+  struct __timeval64 timevals[2];
+  struct __timeval64 *tvp;
+
+  if (times != NULL)
+    {
+      timevals[0].tv_sec = (time_t) times->actime;
+      timevals[0].tv_usec = 0L;
+      timevals[1].tv_sec = (time_t) times->modtime;
+      timevals[1].tv_usec = 0L;
+      tvp = timevals;
+    }
+  else
+    tvp = NULL;
+
+  return __utimes64 (file, tvp);
+}

sysdeps/pthread/aio_suspend.c

@@ -251,3 +251,167 @@ aio_suspend (const struct aiocb *const list[], int nent,
 }
 
 weak_alias (aio_suspend, aio_suspend64)
+
+#ifdef DONT_NEED_AIO_MISC_COND
+static int
+__attribute__ ((noinline))
+do_aio_misc_wait64 (unsigned int *cntr, 
+		      const struct __timespec64 *timeout)
+{
+  int result = 0;
+
+  AIO_MISC_WAIT_T64 (result, *cntr, timeout, 1);
+
+  return result;
+}
+#endif
+
+int
+__aio_suspend64 (const struct aiocb *const list[], int nent,
+	         const struct __timespec64 *timeout)
+{
+  if (__glibc_unlikely (nent < 0))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  struct waitlist waitlist[nent];
+  struct requestlist *requestlist[nent];
+#ifndef DONT_NEED_AIO_MISC_COND
+  pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+#endif
+  int cnt;
+  bool any = false;
+  int result = 0;
+  unsigned int cntr = 1;
+
+  /* Request the mutex.  */
+  pthread_mutex_lock (&__aio_requests_mutex);
+
+  /* There is not yet a finished request.  Signal the request that
+     we are working for it.  */
+  for (cnt = 0; cnt < nent; ++cnt)
+    if (list[cnt] != NULL)
+      {
+	if (list[cnt]->__error_code == EINPROGRESS)
+	  {
+	    requestlist[cnt] = __aio_find_req ((aiocb_union *) list[cnt]);
+
+	    if (requestlist[cnt] != NULL)
+	      {
+#ifndef DONT_NEED_AIO_MISC_COND
+		waitlist[cnt].cond = &cond;
+#endif
+		waitlist[cnt].result = NULL;
+		waitlist[cnt].next = requestlist[cnt]->waiting;
+		waitlist[cnt].counterp = &cntr;
+		waitlist[cnt].sigevp = NULL;
+#ifdef BROKEN_THREAD_SIGNALS
+		waitlist[cnt].caller_pid = 0;	/* Not needed.  */
+#endif
+		requestlist[cnt]->waiting = &waitlist[cnt];
+		any = true;
+	      }
+	    else
+	      /* We will never suspend.  */
+	      break;
+	  }
+	else
+	  /* We will never suspend.  */
+	  break;
+      }
+
+
+  /* Only if none of the entries is NULL or finished to be wait.  */
+  if (cnt == nent && any)
+    {
+      struct clparam clparam =
+	{
+	  .list = list,
+	  .waitlist = waitlist,
+	  .requestlist = requestlist,
+#ifndef DONT_NEED_AIO_MISC_COND
+	  .cond = &cond,
+#endif
+	  .nent = nent
+	};
+
+      pthread_cleanup_push (cleanup, &clparam);
+
+#ifdef DONT_NEED_AIO_MISC_COND
+      result = do_aio_misc_wait64 (&cntr, timeout);
+#else
+      if (timeout == NULL)
+	result = pthread_cond_wait (&cond, &__aio_requests_mutex);
+      else
+	{
+	  /* We have to convert the relative timeout value into an
+	     absolute time value with pthread_cond_timedwait expects.  */
+	  struct timeval now;
+	  struct timespec abstime;
+
+	  __gettimeofday (&now, NULL);
+	  abstime.tv_nsec = timeout->tv_nsec + now.tv_usec * 1000;
+	  abstime.tv_sec = timeout->tv_sec + now.tv_sec;
+	  if (abstime.tv_nsec >= 1000000000)
+	    {
+	      abstime.tv_nsec -= 1000000000;
+	      abstime.tv_sec += 1;
+	    }
+
+	  result = __pthread_cond_timedwait64 (&cond,
+					       &__aio_requests_mutex,
+					       &abstime);
+	}
+#endif
+
+      pthread_cleanup_pop (0);
+    }
+
+  /* Now remove the entry in the waiting list for all requests
+     which didn't terminate.  */
+  while (cnt-- > 0)
+    if (list[cnt] != NULL && list[cnt]->__error_code == EINPROGRESS)
+      {
+	struct waitlist **listp;
+
+	assert (requestlist[cnt] != NULL);
+
+	/* There is the chance that we cannot find our entry anymore. This
+	   could happen if the request terminated and restarted again.  */
+	listp = &requestlist[cnt]->waiting;
+	while (*listp != NULL && *listp != &waitlist[cnt])
+	  listp = &(*listp)->next;
+
+	if (*listp != NULL)
+	  *listp = (*listp)->next;
+      }
+
+#ifndef DONT_NEED_AIO_MISC_COND
+  /* Release the conditional variable.  */
+  if (__glibc_unlikely (pthread_cond_destroy (&cond) != 0))
+    /* This must never happen.  */
+    abort ();
+#endif
+
+  if (result != 0)
+    {
+#ifndef DONT_NEED_AIO_MISC_COND
+      /* An error occurred.  Possibly it's ETIMEDOUT.  We have to translate
+	 the timeout error report of `pthread_cond_timedwait' to the
+	 form expected from `aio_suspend'.  */
+      if (result == ETIMEDOUT)
+	__set_errno (EAGAIN);
+      else
+#endif
+	__set_errno (result);
+
+      result = -1;
+    }
+
+  /* Release the mutex.  */
+  pthread_mutex_unlock (&__aio_requests_mutex);
+
+  return result;
+}

sysdeps/pthread/semaphore.h

@@ -57,6 +57,16 @@ extern int sem_wait (sem_t *__sem);
 
    This function is a cancellation point and therefore not marked with
    __THROW.  */
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT)
+extern struct tm * __REDIRECT (sem_timedwait,
+                               (sem_t *__restrict __sem,
+                                const struct timespec *__restrict __abstime),
+       __sem_timedwait64);
+# else
+# define sem_timedwait __sem_timedwait64
+# endif
+#endif
 extern int sem_timedwait (sem_t *__restrict __sem,
 			  const struct timespec *__restrict __abstime);
 #endif

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)

sysdeps/unix/clock_settime.c

@@ -68,8 +68,66 @@ hp_timing_settime (clockid_t clock_id, const struct timespec *tp)
 }
 #endif
 
-
 /* Set CLOCK to value TP.  */
+int
+__clock_settime64 (clockid_t clock_id, const struct __timespec64 *tp)
+{
+#ifndef HANDLED_REALTIME
+  struct timeval tv32;
+#endif
+  int retval = -1;
+
+  /* Make sure the time cvalue is OK.  */
+  if (! IS_VALID_NANOSECONDS(tp->tv_nsec))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  switch (clock_id)
+    {
+#define HANDLE_REALTIME64 \
+      if (timespec64_to_timeval (tp, &tv32))				\
+        {								\
+	  retval = __settimeofday (&tv32, NULL);			\
+      else								\
+        {								\
+          __set_errno (EOVERFLOW);					\
+	  retval = -1;							\
+        }
+
+#ifdef SYSDEP_SETTIME64
+      SYSDEP_SETTIME64;
+#endif
+
+#ifndef HANDLED_REALTIME
+    case CLOCK_REALTIME:
+      HANDLE_REALTIME64;
+      break;
+#endif
+
+    default:
+#ifdef SYSDEP_SETTIME64_CPU
+      SYSDEP_SETTIME64_CPU;
+#endif
+#ifndef HANDLED_CPUTIME
+# if HP_TIMING_AVAIL
+      if (CPUCLOCK_WHICH (clock_id) == CLOCK_PROCESS_CPUTIME_ID
+	  || CPUCLOCK_WHICH (clock_id) == CLOCK_THREAD_CPUTIME_ID)
+	retval = hp_timing_settime (clock_id, tp);
+      else
+# endif
+	{
+	  __set_errno (EINVAL);
+	  retval = -1;
+	}
+#endif
+      break;
+    }
+
+  return retval;
+}
+
 int
 __clock_settime (clockid_t clock_id, const struct timespec *tp)
 {

sysdeps/unix/stime64.c

@@ -0,0 +1,47 @@
+/* Set the system clock on a unix system 
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stddef.h>		/* For NULL.  */
+#include <sys/time.h>
+#include <time.h>
+
+/* Set the system clock to *WHEN.  */
+
+int
+__stime64 (const __time64_t *when)
+{
+  struct __timeval64 tv;
+
+  if (when == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  if (*when > INT_MAX)
+    {
+      __set_errno (EOVERFLOW);
+      return -1;
+    }
+
+  tv.tv_sec = *when;
+  tv.tv_usec = 0;
+  return __settimeofday64 (&tv, (struct timezone *) 0);
+}

sysdeps/unix/sysv/linux/Versions

@@ -170,6 +170,8 @@ libc {
     memfd_create;
     mlock2;
     pkey_alloc; pkey_free; pkey_set; pkey_get; pkey_mprotect;
+    __ntp_gettime64;
+    __ntp_gettimex64;
   }
   GLIBC_PRIVATE {
     # functions used in other libraries

sysdeps/unix/sysv/linux/adjtime.c

@@ -19,6 +19,7 @@
 #include <limits.h>
 #include <sys/time.h>
 #include <sys/timex.h>
+#include <include/time.h>
 
 #define MAX_SEC	(INT_MAX / 1000000L - 2)
 #define MIN_SEC	(INT_MIN / 1000000L + 2)

sysdeps/unix/sysv/linux/adjtime64.c

@@ -0,0 +1,164 @@
+/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <limits.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+#include <include/time.h>
+
+#define MAX_SEC	(INT_MAX / 1000000L - 2)
+#define MIN_SEC	(INT_MIN / 1000000L + 2)
+
+#ifndef MOD_OFFSET
+#define modes mode
+#endif
+
+#ifndef TIMEVAL
+#define TIMEVAL timeval
+#endif
+
+#ifndef TIMEX
+#define TIMEX timex
+#endif
+
+#ifndef ADJTIME
+#define ADJTIME __adjtime
+#endif
+
+#ifndef ADJTIMEX
+#define NO_LOCAL_ADJTIME
+#define ADJTIMEX(x) __adjtimex (x)
+#endif
+
+#ifndef LINKAGE
+#define LINKAGE
+#endif
+
+int __adjtime64 (const struct __timeval64 *itv,
+                 struct __timeval64 *otv)
+{
+  struct TIMEX tntx;
+
+  if (itv)
+    {
+      struct TIMEVAL tmp;
+
+      /* We will do some check here. */
+      tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
+      tmp.tv_usec = itv->tv_usec % 1000000L;
+      if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
+	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+      tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
+      tntx.modes = ADJ_OFFSET_SINGLESHOT;
+    }
+  else
+    tntx.modes = ADJ_OFFSET_SS_READ;
+
+  if (__glibc_unlikely (ADJTIMEX (&tntx) < 0))
+    return -1;
+
+  if (otv)
+    {
+      if (tntx.offset < 0)
+	{
+	  otv->tv_usec = -(-tntx.offset % 1000000);
+	  otv->tv_sec  = -(-tntx.offset / 1000000);
+	}
+      else
+	{
+	  otv->tv_usec = tntx.offset % 1000000;
+	  otv->tv_sec  = tntx.offset / 1000000;
+	}
+    }
+  return 0;
+}
+
+int
+__adjtimex64(struct __timex64 *tx)
+{
+  struct timex tx32;
+
+  if (tx == NULL)
+    {
+      __set_errno (EFAULT);
+      return -1;
+    }
+
+  if ((tx->modes & ADJ_SETOFFSET) != 0 && tx->time.tv_sec > INT_MAX)
+    {
+      __set_errno (EOVERFLOW);
+      return -1;
+    }
+
+  /* Implement with existing 32-bit time syscall */
+
+  /* Just copy everything */
+  tx32.modes = tx->modes;
+  tx32.offset = tx->offset;
+  tx32.freq = tx->freq;
+  tx32.maxerror = tx->maxerror;
+  tx32.esterror = tx->esterror;
+  tx32.status = tx->status;
+  tx32.constant = tx->constant;
+  tx32.precision = tx->precision;
+  tx32.tolerance = tx->tolerance;
+  tx32.time.tv_sec = tx->time.tv_sec;
+  tx32.time.tv_usec = tx->time.tv_usec;
+  tx32.tick = tx->tick;
+  tx32.ppsfreq = tx->ppsfreq;
+  tx32.jitter = tx->jitter;
+  tx32.shift = tx->shift;
+  tx32.stabil = tx->stabil;
+  tx32.jitcnt = tx->jitcnt;
+  tx32.calcnt = tx->calcnt;
+  tx32.errcnt = tx->errcnt;
+  tx32.stbcnt = tx->stbcnt;
+
+  tx32.tai = tx->tai;
+  /* WARNING -- anonymous fields after TAI are not copied. */
+
+  int result = ADJTIMEX(&tx32);
+
+  if (result == 0)
+    {
+      /* Just copy back everything */
+      tx->modes = tx32.modes;
+      tx->offset = tx32.offset;
+      tx->freq = tx32.freq;
+      tx->maxerror = tx32.maxerror;
+      tx->esterror = tx32.esterror;
+      tx->status = tx32.status;
+      tx->constant = tx32.constant;
+      tx->precision = tx32.precision;
+      tx->tolerance = tx32.tolerance;
+      tx->time.tv_sec = tx32.time.tv_sec;
+      tx->time.tv_usec = tx32.time.tv_usec;
+      tx->tick = tx32.tick;
+      tx->ppsfreq = tx32.ppsfreq;
+      tx->jitter = tx32.jitter;
+      tx->shift = tx32.shift;
+      tx->stabil = tx32.stabil;
+      tx->jitcnt = tx32.jitcnt;
+      tx->calcnt = tx32.calcnt;
+      tx->errcnt = tx32.errcnt;
+      tx->stbcnt = tx32.stbcnt;
+    }
+
+  return result;
+}
+weak_alias (__adjtimex64, __ntp_adjtime64);

sysdeps/unix/sysv/linux/alpha/bits/resource.h

@@ -176,6 +176,7 @@ enum __rusage_who
 };
 
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 #include <bits/types/struct_rusage.h>
 
 /* Priority limits.  */

sysdeps/unix/sysv/linux/arm/libpthread.abilist

@@ -27,6 +27,9 @@ GLIBC_2.28 tss_create F
 GLIBC_2.28 tss_delete F
 GLIBC_2.28 tss_get F
 GLIBC_2.28 tss_set F
+GLIBC_2.29 __pthread_cond_timedwait64 F
+GLIBC_2.29 __pthread_mutex_timedlock64 F
+GLIBC_2.29 __sem_timedwait64 F
 GLIBC_2.4 _IO_flockfile F
 GLIBC_2.4 _IO_ftrylockfile F
 GLIBC_2.4 _IO_funlockfile F

sysdeps/unix/sysv/linux/arm/librt.abilist

@@ -1,3 +1,10 @@
+GLIBC_2.29 __aio_suspend64 F
+GLIBC_2.29 __mq_timedreceive64 F
+GLIBC_2.29 __mq_timedsend_time64 F
+GLIBC_2.29 __timer_gettime64 F
+GLIBC_2.29 __timer_settime64 F
+GLIBC_2.29 __timerfd_gettime64 F
+GLIBC_2.29 __timerfd_settime64 F
 GLIBC_2.4 aio_cancel F
 GLIBC_2.4 aio_cancel64 F
 GLIBC_2.4 aio_error F

sysdeps/unix/sysv/linux/bits/msq.h

@@ -46,6 +46,22 @@ typedef __syscall_ulong_t msglen_t;
 
 /* Structure of record for one message inside the kernel.
    The type `struct msg' is opaque.  */
+#ifdef __USE_TIME_BITS64
+struct msqid_ds
+{
+  struct ipc_perm msg_perm;	/* structure describing operation permission */
+  __time64_t msg_stime;		/* time of last msgsnd command */
+  __time64_t msg_rtime;		/* time of last msgrcv command */
+  __time64_t msg_ctime;		/* time of last change */
+  unsigned long int __msg_cbytes; /* current number of bytes on queue */
+  msgqnum_t msg_qnum;		/* number of messages currently on queue */
+  msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
+  __pid_t msg_lspid;		/* pid of last msgsnd() */
+  __pid_t msg_lrpid;		/* pid of last msgrcv() */
+  unsigned long int __glibc_reserved4;
+  unsigned long int __glibc_reserved5;
+};
+#else
 struct msqid_ds
 {
   struct ipc_perm msg_perm;	/* structure describing operation permission */
@@ -60,6 +76,7 @@ struct msqid_ds
   __syscall_ulong_t __glibc_reserved4;
   __syscall_ulong_t __glibc_reserved5;
 };
+#endif
 
 #ifdef __USE_MISC
 

sysdeps/unix/sysv/linux/bits/resource.h

@@ -176,6 +176,7 @@ enum __rusage_who
 };
 
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 #include <bits/types/struct_rusage.h>
 
 /* Priority limits.  */

sysdeps/unix/sysv/linux/bits/stat.h

@@ -119,11 +119,11 @@ struct stat64
     struct timespec st_mtim;		/* Time of last modification.  */
     struct timespec st_ctim;		/* Time of last status change.  */
 # else
-    __time_t st_atime;			/* Time of last access.  */
+    time_t st_atime;			/* Time of last access.  */
     unsigned long int st_atimensec;	/* Nscecs of last access.  */
-    __time_t st_mtime;			/* Time of last modification.  */
+    time_t st_mtime;			/* Time of last modification.  */
     unsigned long int st_mtimensec;	/* Nsecs of last modification.  */
-    __time_t st_ctime;			/* Time of last status change.  */
+    time_t st_ctime;			/* Time of last status change.  */
     unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
 # endif
     __ino64_t st_ino;			/* File serial number.		*/

sysdeps/unix/sysv/linux/bits/timex.h

@@ -20,6 +20,7 @@
 
 #include <bits/types.h>
 #include <bits/types/struct_timeval.h>
+#include <bits/types/struct_timeval64.h>
 
 /* These definitions from linux/timex.h as of 3.18.  */
 

sysdeps/unix/sysv/linux/clock_getres.c

@@ -19,6 +19,7 @@
 #include <sysdep.h>
 #include <errno.h>
 #include <time.h>
+#include <y2038-support.h>
 #include "kernel-posix-cpu-timers.h"
 
 #ifdef HAVE_CLOCK_GETRES_VSYSCALL
@@ -48,4 +49,64 @@
 #define SYSDEP_GETRES_CPU SYSCALL_GETRES
 #define SYSDEP_GETRES_CPUTIME	/* Default catches them too.  */
 
+/* The 64-bit version */
+
+// Call the 32-bit syscall and convert to 64-bit time
+#define SYSCALL_GETRES32 \
+  retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, &ts32);		\
+  if (retval==0)							\
+    {									\
+      timespec_to_timespec64(&ts32, res);				\
+      res->tv_pad = 0;							\
+    }
+
+#ifdef __NR_clock_getres_time64
+
+/* We are building with a 64-bit-time getres syscall */
+
+#define SYSCALL_GETRES64 \
+  if (__y2038_linux_support > 0)					\
+    {									\
+      retval = INLINE_SYSCALL (clock_getres_time64, 2, clock_id, res);	\
+      if (retval == -1 && errno == ENOSYS)				\
+	{								\
+	  __y2038_linux_support = -1;					\
+	  SYSCALL_GETRES32;						\
+	}								\
+    }									\
+  else									\
+    {									\
+      SYSCALL_GETRES32;							\
+    }									\
+  break
+
+#else
+
+/* We are building without a 64-bit-time getres syscall */
+
+#define SYSCALL_GETRES64 \
+  SYSCALL_GETRES32;							\
+  break
+
+#endif
+
+/* The REALTIME and MONOTONIC clock are definitely supported in the
+   kernel.  */
+#define SYSDEP_GETRES64							\
+  SYSDEP_GETRES_CPUTIME64						\
+  case CLOCK_REALTIME:							\
+  case CLOCK_MONOTONIC:							\
+  case CLOCK_MONOTONIC_RAW:						\
+  case CLOCK_REALTIME_COARSE:						\
+  case CLOCK_MONOTONIC_COARSE:						\
+    SYSCALL_GETRES64
+
+/* We handled the REALTIME clock here.  */
+#define HANDLED_REALTIME64	1
+#define HANDLED_CPUTIME64	1
+
+#define SYSDEP_GETRES_CPU64 SYSCALL_GETRES64
+#define SYSDEP_GETRES_CPUTIME64 \
+  struct timespec ts32;
+
 #include <sysdeps/posix/clock_getres.c>

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>

sysdeps/unix/sysv/linux/clock_nanosleep.c

@@ -21,7 +21,6 @@
 #include <sysdep-cancel.h>
 #include "kernel-posix-cpu-timers.h"
 
-
 /* We can simply use the syscall.  The CPU clocks are not supported
    with this function.  */
 int
@@ -52,3 +51,51 @@ __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
 	  ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
 }
 weak_alias (__clock_nanosleep, clock_nanosleep)
+
+/* 64-bit time version */
+
+/* We don't have a 64-bit-time syscall yet, so just convert arguments
+ * between 64-bit and 32-bit time, and use the 32-bit implementation.
+ * 
+ * We could do the reverse and make the 32-bit time implementation a
+ * wrapper around the 64-bit-time implementation, but then 32-bit-time
+ * uses would incur four conversions instead of zero right now.
+ */
+int
+__clock_nanosleep64 (clockid_t clock_id, int flags,
+		     const struct __timespec64 *req,
+		     struct __timespec64 *rem)
+{
+  int res;
+  struct timespec req32, rem32, *rem32p = NULL;
+
+  if (req == NULL)
+    {
+      __set_errno (EFAULT);
+      return -1;
+    }
+
+  if (req->tv_sec > INT32_MAX || req->tv_sec < INT32_MIN)
+    {
+      __set_errno (EOVERFLOW);
+      return -1;
+    }
+
+  /* For now, use the 32-bit-time implementation above */
+
+  req32.tv_sec = req->tv_sec;
+  req32.tv_nsec = req->tv_nsec;
+
+  if (rem != NULL)
+    rem32p = &rem32;
+
+  res = __clock_nanosleep (clock_id, flags, &req32, rem32p);
+
+  if (res == 0 && rem != NULL)
+    {
+      rem->tv_sec = rem32.tv_sec;
+      rem->tv_nsec = rem32.tv_nsec;
+    }
+
+  return res;
+}

sysdeps/unix/sysv/linux/clock_settime.c

@@ -18,6 +18,7 @@
 #include <errno.h>
 #include <sysdep.h>
 #include <time.h>
+#include <y2038-support.h>
 
 #include "kernel-posix-cpu-timers.h"
 
@@ -35,4 +36,61 @@
 #define SYSDEP_SETTIME_CPU \
   retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp)
 
+/* 64-bit time version */
+
+# define DO_CLOCK_SETTIME_32 \
+  if (! fits_in_time_t(tp->tv_sec))					\
+    {									\
+      __set_errno (EOVERFLOW);						\
+      retval = -1;							\
+    }									\
+  else									\
+    {									\
+      valid_timespec64_to_timespec(tp, &ts32);  			\
+      retval = INLINE_SYSCALL (clock_settime, 2, clock_id, &ts32);	\
+    }
+
+#ifdef __NR_clock_settime64
+
+/* We are building with a 64-bit-time clock_gettime syscall */
+
+# define DO_CLOCK_SETTIME_64 \
+  if (__y2038_linux_support > 0)					\
+    {									\
+      ts64.tv_sec = tp->tv_sec;						\
+      ts64.tv_nsec = tp->tv_nsec;						\
+      ts64.tv_pad = 0;							\
+      retval = INLINE_SYSCALL (clock_settime64, 2, clock_id, &ts64);	\
+      if (retval == 1 && errno==ENOSYS)					\
+	{								\
+	  __y2038_linux_support = -1;					\
+	  DO_CLOCK_SETTIME_32;						\
+	}								\
+    }									\
+  else									\
+    {									\
+      DO_CLOCK_SETTIME_32;						\
+    }
+
+# define SYSDEP_SETTIME64_CPUTIME \
+  struct __timespec64 ts64;						\
+  struct timespec ts32
+
+#else
+
+/* We are building without a 64-bit-time clock_gettime syscall */
+
+# define DO_CLOCK_SETTIME_64 DO_CLOCK_SETTIME_32
+
+# define SYSDEP_SETTIME64_CPUTIME \
+  struct timespec ts32
+
+#endif
+
+#define SYSDEP_SETTIME64 \
+  SYSDEP_SETTIME64_CPUTIME;						\
+  case CLOCK_REALTIME:							\
+    DO_CLOCK_SETTIME_64;						\
+    break
+
 #include <sysdeps/unix/clock_settime.c>

sysdeps/unix/sysv/linux/futex-internal.h

@@ -131,6 +131,32 @@ futex_reltimed_wait (unsigned int *futex_word, unsigned int expected,
     }
 }
 
+/* 64-bit time version */
+static __always_inline int
+futex_reltimed_wait64 (unsigned int *futex_word, unsigned int expected,
+		         const struct __timespec64 *reltime, int private)
+{
+  int err = lll_futex_timed_wait64 (futex_word, expected, reltime,
+                                      private);
+  switch (err)
+    {
+    case 0:
+    case -EAGAIN:
+    case -EINTR:
+    case -ETIMEDOUT:
+      return -err;
+
+    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
+    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
+		     being normalized.  Must have been caused by a glibc or
+		     application bug.  */
+    case -ENOSYS: /* Must have been caused by a glibc bug.  */
+    /* No other errors are documented at this time.  */
+    default:
+      futex_fatal_error ();
+    }
+}
+
 /* See sysdeps/nptl/futex-internal.h for details.  */
 static __always_inline int
 futex_reltimed_wait_cancelable (unsigned int *futex_word,
@@ -160,6 +186,37 @@ futex_reltimed_wait_cancelable (unsigned int *futex_word,
     }
 }
 
+/* 64-bit time version */
+
+static __always_inline int
+futex_reltimed_wait_cancelable64 (unsigned int *futex_word,
+				    unsigned int expected,
+			            const struct __timespec64 *reltime,
+                                    int private)
+{
+  int oldtype;
+  oldtype = __pthread_enable_asynccancel ();
+  int err = lll_futex_timed_wait64 (futex_word, expected, reltime, private);
+  __pthread_disable_asynccancel (oldtype);
+  switch (err)
+    {
+    case 0:
+    case -EAGAIN:
+    case -EINTR:
+    case -ETIMEDOUT:
+      return -err;
+
+    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
+    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
+		     being normalized.  Must have been caused by a glibc or
+		     application bug.  */
+    case -ENOSYS: /* Must have been caused by a glibc bug.  */
+    /* No other errors are documented at this time.  */
+    default:
+      futex_fatal_error ();
+    }
+}
+
 /* See sysdeps/nptl/futex-internal.h for details.  */
 static __always_inline int
 futex_abstimed_wait (unsigned int *futex_word, unsigned int expected,
@@ -190,6 +247,36 @@ futex_abstimed_wait (unsigned int *futex_word, unsigned int expected,
     }
 }
 
+/* 64-bit time version */
+static __always_inline int
+futex_abstimed_wait64 (unsigned int *futex_word, unsigned int expected,
+		         const struct __timespec64 *abstime, int private)
+{
+  /* Work around the fact that the kernel rejects negative timeout values
+     despite them being valid.  */
+  if (__glibc_unlikely ((abstime != NULL) && (abstime->tv_sec < 0)))
+    return ETIMEDOUT;
+  int err = lll_futex_timed_wait_bitset64 (futex_word, expected, abstime,
+					     FUTEX_CLOCK_REALTIME, private);
+  switch (err)
+    {
+    case 0:
+    case -EAGAIN:
+    case -EINTR:
+    case -ETIMEDOUT:
+      return -err;
+
+    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
+    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
+		     being normalized.  Must have been caused by a glibc or
+		     application bug.  */
+    case -ENOSYS: /* Must have been caused by a glibc bug.  */
+    /* No other errors are documented at this time.  */
+    default:
+      futex_fatal_error ();
+    }
+}
+
 /* See sysdeps/nptl/futex-internal.h for details.  */
 static __always_inline int
 futex_abstimed_wait_cancelable (unsigned int *futex_word,
@@ -224,6 +311,42 @@ futex_abstimed_wait_cancelable (unsigned int *futex_word,
     }
 }
 
+/* 64-bit time version */
+
+static __always_inline int
+futex_abstimed_wait_cancelable64 (unsigned int *futex_word,
+				    unsigned int expected,
+			            const struct __timespec64 *abstime,
+                                    int private)
+{
+  /* Work around the fact that the kernel rejects negative timeout values
+     despite them being valid.  */
+  if (__glibc_unlikely ((abstime != NULL) && (abstime->tv_sec < 0)))
+    return ETIMEDOUT;
+  int oldtype;
+  oldtype = __pthread_enable_asynccancel ();
+  int err = lll_futex_timed_wait_bitset64 (futex_word, expected, abstime,
+					     FUTEX_CLOCK_REALTIME, private);
+  __pthread_disable_asynccancel (oldtype);
+  switch (err)
+    {
+    case 0:
+    case -EAGAIN:
+    case -EINTR:
+    case -ETIMEDOUT:
+      return -err;
+
+    case -EFAULT: /* Must have been caused by a glibc or application bug.  */
+    case -EINVAL: /* Either due to wrong alignment or due to the timeout not
+		     being normalized.  Must have been caused by a glibc or
+		     application bug.  */
+    case -ENOSYS: /* Must have been caused by a glibc bug.  */
+    /* No other errors are documented at this time.  */
+    default:
+      futex_fatal_error ();
+    }
+}
+
 /* See sysdeps/nptl/futex-internal.h for details.  */
 static __always_inline void
 futex_wake (unsigned int *futex_word, int processes_to_wake, int private)

sysdeps/unix/sysv/linux/futimens.c

@@ -21,7 +21,7 @@
 #include <string.h>
 #include <time.h>
 #include <sysdep.h>
-
+#include <y2038-support.h>
 
 /* Change the access time of the file associated with FD to TSP[0] and
    the modification time of FILE to TSP[1].
@@ -36,3 +36,50 @@ futimens (int fd, const struct timespec tsp[2])
   /* Avoid implicit array coercion in syscall macros.  */
   return INLINE_SYSCALL (utimensat, 4, fd, NULL, &tsp[0], 0);
 }
+
+/* 64-bit time version */
+
+int
+__futimens64 (int fd, const struct __timespec64 tsp[2])
+{
+  struct timespec ts32[2];
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimesat_time64
+  struct __timespec64 ts64[2];
+  int res;
+#endif
+
+  if (fd < 0)
+    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EBADF);
+
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimesat_time64
+  if (__y2038_linux_support > 0)
+    {
+      ts64[0].tv_sec = tsp[0].tv_sec;
+      ts64[0].tv_nsec = tsp[0].tv_nsec;
+      ts64[0].tv_pad = 0;
+      ts64[1].tv_sec = tsp[1].tv_sec;
+      ts64[1].tv_nsec = tsp[1].tv_nsec;
+      ts64[1].tv_pad = 0;
+      res = INLINE_SYSCALL (utimensat_time64, 4, fd, NULL, &ts64[0], 0);
+      if (res == 0 || errno != ENOSYS)
+        return res;
+      __y2038_linux_support = -1;
+    }
+#endif
+
+  if (! timespec64_to_timespec(&tsp[0], &ts32[0]))
+    {
+      __set_errno(EOVERFLOW);
+      return -1;
+    }
+
+  if (! timespec64_to_timespec(&tsp[1], &ts32[1]))
+    {
+      __set_errno(EOVERFLOW);
+      return -1;
+    }
+
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, &ts32[0], 0);
+}

sysdeps/unix/sysv/linux/futimes.c

@@ -24,6 +24,7 @@
 #include <sys/time.h>
 #include <_itoa.h>
 #include <fcntl.h>
+#include <y2038-support.h>
 
 
 /* Change the access time of the file associated with FD to TVP[0] and
@@ -49,3 +50,61 @@ __futimes (int fd, const struct timeval tvp[2])
   return INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
 }
 weak_alias (__futimes, futimes)
+
+/* 64-bit time version */
+
+int
+__futimes64 (int fd, const struct __timeval64 tvp[2])
+{
+  struct timespec ts32[2], *ts32p = NULL;
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimensat_time64
+  /* The utimensat system call expects timespec not timeval.  */
+  struct __timespec64 ts64[2], *ts64p = NULL;
+  int result;
+#endif
+
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimensat_time64
+  if (__y2038_linux_support > 0)
+    {
+      if (tvp != NULL)
+        {
+          if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+              || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+  	    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+        
+          ts64[0].tv_sec = tvp[0].tv_sec;
+          ts64[0].tv_nsec = tvp[0].tv_usec * 1000;
+          ts64[0].tv_pad = 0;
+          ts64[1].tv_sec = tvp[1].tv_sec;
+          ts64[1].tv_nsec = tvp[1].tv_usec * 1000;
+          ts64[1].tv_pad = 0;
+          ts64p = ts64;
+        }
+    
+      result = INLINE_SYSCALL (utimensat_time64, 4, fd, NULL, ts64p, 0);
+      if (result == 0 || errno != ENOSYS)
+        return result;
+      __y2038_linux_support = -1;
+    }
+#endif
+
+  if (tvp != NULL)
+    {
+      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+        return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+    
+      if (tvp[0].tv_sec > INT_MAX || tvp[1].tv_sec > INT_MAX)
+        return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
+    
+      ts32[0].tv_sec = tvp[0].tv_sec;
+      ts32[0].tv_nsec = tvp[0].tv_usec * 1000;
+      ts32[1].tv_sec = tvp[1].tv_sec;
+      ts32[1].tv_nsec = tvp[1].tv_usec * 1000;
+      ts32p = ts32;
+    }
+
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, ts32p, 0);
+}

sysdeps/unix/sysv/linux/fxstat64.c

@@ -51,3 +51,43 @@ hidden_ver (___fxstat64, __fxstat64)
 strong_alias (___fxstat64, __fxstat64)
 hidden_def (__fxstat64)
 #endif
+
+/* 64-bit time version */
+
+int
+__fxstat64_time64 (int vers, int fd, struct __stat64_t64 *buf)
+{
+  int result;
+  struct stat64 st64;
+
+  result = INLINE_SYSCALL (fstat64, 2, fd, &st64);
+#if defined _HAVE_STAT64___ST_INO && !__ASSUME_ST_INO_64_BIT
+  if (__builtin_expect (!result, 1) && st64.__st_ino != (__ino_t) st64.st_ino)
+    st64.st_ino = st64.__st_ino;
+#endif
+  if (!result)
+    {
+      buf->st_dev          = st64.st_dev;
+#if defined _HAVE_STAT64___ST_INO
+      buf->__st_ino        = st64.__st_ino;
+#endif
+      buf->st_mode         = st64.st_mode;
+      buf->st_nlink        = st64.st_nlink;
+      buf->st_uid          = st64.st_uid;		 
+      buf->st_gid          = st64.st_gid;		 
+      buf->st_rdev         = st64.st_rdev;		 
+      buf->st_size         = st64.st_size;		 
+      buf->st_blksize      = st64.st_blksize;
+    
+      buf->st_blocks       = st64.st_blocks;		
+      buf->st_atim.tv_sec  = st64.st_atim.tv_sec;	
+      buf->st_atim.tv_nsec = st64.st_atim.tv_nsec;	
+      buf->st_mtim.tv_sec  = st64.st_mtim.tv_sec;	
+      buf->st_mtim.tv_nsec = st64.st_mtim.tv_nsec;	
+      buf->st_ctim.tv_sec  = st64.st_ctim.tv_sec;	
+      buf->st_ctim.tv_nsec = st64.st_ctim.tv_nsec;	
+    
+      buf->st_ino          = st64.st_ino;
+    }
+  return result;
+}

sysdeps/unix/sysv/linux/fxstatat64.c

@@ -45,3 +45,48 @@ __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
 								      err));
 }
 libc_hidden_def (__fxstatat64)
+
+/* 64-bit time version */
+
+int
+__fxstatat64_time64 (int vers, int fd, const char *file, struct __stat64_t64 *buf, int flag)
+{
+  if (__glibc_unlikely (vers != _STAT_VER_LINUX))
+    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+
+  int result;
+  struct stat64 st64;
+  INTERNAL_SYSCALL_DECL (err);
+
+  result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, &st64, flag);
+  if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
+    {
+      buf->st_dev          = st64.st_dev;
+    
+#if defined _HAVE_STAT64___ST_INO
+      buf->__st_ino        = st64.__st_ino;
+#endif
+      buf->st_mode         = st64.st_mode;
+      buf->st_nlink        = st64.st_nlink;
+      buf->st_uid          = st64.st_uid;		 
+      buf->st_gid          = st64.st_gid;		 
+      buf->st_rdev         = st64.st_rdev;		 
+      buf->st_size         = st64.st_size;		 
+      buf->st_blksize      = st64.st_blksize;
+    
+      buf->st_blocks       = st64.st_blocks;		
+      buf->st_atim.tv_sec  = st64.st_atim.tv_sec;	
+      buf->st_atim.tv_nsec = st64.st_atim.tv_nsec;	
+      buf->st_mtim.tv_sec  = st64.st_mtim.tv_sec;	
+      buf->st_mtim.tv_nsec = st64.st_mtim.tv_nsec;	
+      buf->st_ctim.tv_sec  = st64.st_ctim.tv_sec;	
+      buf->st_ctim.tv_nsec = st64.st_ctim.tv_nsec;	
+    
+      buf->st_ino          = st64.st_ino;
+    
+      return 0;
+    }
+  else
+    return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result,
+								      err));
+}

sysdeps/unix/sysv/linux/gettimeofday64.c

@@ -0,0 +1,52 @@
+/* Copyright (C) 2015-2018 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sys/time.h>
+
+#undef __gettimeofday
+
+#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
+# define HAVE_VSYSCALL
+#include <sysdep-vdso.h>
+#endif
+
+/* Get the current time of day and timezone information,
+   putting it into *tv and *tz.  If tz is null, *tz is not filled.
+   Returns 0 on success, -1 on errors.  */
+
+int
+__gettimeofday64 (struct __timeval64 *tv, struct timezone *tz)
+{
+  struct timeval tv32;
+  int result;
+
+#ifdef __vdso_gettimeofday
+  result = INLINE_VSYSCALL (gettimeofday, 2, &tv32, tz);
+#else
+  result = INLINE_SYSCALL (gettimeofday, 2, &tv32, tz);
+#endif
+
+  if (result == 0)
+    {
+      tv->tv_sec = tv32.tv_sec;
+      tv->tv_usec = tv32.tv_usec;
+    }
+
+  return result;
+}

sysdeps/unix/sysv/linux/kernel-features.h

@@ -154,3 +154,17 @@
    */
 
 #define __ASSUME_CLONE_DEFAULT 1
+
+/* Support for Y2038-proof times.
+
+   If defined, the underlying kernel always provides a set of syscalls
+   (__NR_* names and numbers) which can handle times beyond Y2038.
+
+   If undefined, whether the underlying kernel provides this set or not
+   must be checked dynamically.
+
+   Definition is commented out until Y2038 syscalls are merged in the
+   kernel.
+   */
+
+/* #define __ASSUME_KERNEL_Y2038_SUPPORT 1 */

sysdeps/unix/sysv/linux/lowlevellock-futex.h

@@ -82,6 +82,16 @@
 		     __lll_private_flag (FUTEX_WAIT, private),  \
 		     val, timeout)
 
+#define lll_futex_timed_wait64(futexp, val, timeout, private)     \
+  ({                                                                       \
+    struct timespec ts;                                                    \
+    ts.tv_sec = timeout->tv_sec;                                           \
+    ts.tv_nsec = timeout->tv_nsec;                                         \
+    lll_futex_syscall (4, futexp,                                 	   \
+		       __lll_private_flag (FUTEX_WAIT, private),  	   \
+		       val, &ts);					   \
+  })
+
 #define lll_futex_timed_wait_bitset(futexp, val, timeout, clockbit, private) \
   lll_futex_syscall (6, futexp,                                         \
 		     __lll_private_flag (FUTEX_WAIT_BITSET | (clockbit), \
@@ -89,6 +99,18 @@
 		     val, timeout, NULL /* Unused.  */,                 \
 		     FUTEX_BITSET_MATCH_ANY)
 
+#define lll_futex_timed_wait_bitset64(futexp, val, timeout, clockbit, private) \
+  ({                                                                       \
+    struct timespec ts;                                                    \
+    ts.tv_sec = timeout->tv_sec;                                           \
+    ts.tv_nsec = timeout->tv_nsec;                                         \
+    lll_futex_syscall (6, futexp,                                          \
+		       __lll_private_flag (FUTEX_WAIT_BITSET | (clockbit), \
+		                           private),                       \
+		       val, &ts, NULL /* Unused.  */,                      \
+		       FUTEX_BITSET_MATCH_ANY);                            \
+  })
+
 #define lll_futex_wake(futexp, nr, private)                             \
   lll_futex_syscall (4, futexp,                                         \
 		     __lll_private_flag (FUTEX_WAKE, private), nr, 0)