y2038: nptl: Convert sem_{clock|timed}wait to support 64 bit time

The sem_clockwait and sem_timedwait have been converted to support 64 bit time.

This change reuses futex_abstimed_wait_cancelable64 function introduced earlier.
The sem_{clock|timed}wait only accepts absolute time. Moreover, there is no
need to check for NULL passed as *abstime pointer to the syscalls as both calls
have exported symbols marked with __nonull attribute for abstime.

For systems with __TIMESIZE != 64 && __WORDSIZE == 32:
- Conversion from 32 bit time to 64 bit struct __timespec64 was necessary
- Redirection to __sem_{clock|timed}wait64 will provide support for 64 bit
  time

Build tests:
./src/scripts/build-many-glibcs.py glibcs

Run-time tests:
- Run specific tests on ARM/x86 32bit systems (qemu):
  https://github.com/lmajewski/meta-y2038 and run tests:
  https://github.com/lmajewski/y2038-tests/commits/master

Above tests were performed with Y2038 redirection applied as well as without
to test the proper usage of both __sem_{clock|timed}wait64 and
__sem_{clock|timed}wait.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/nptl/semaphoreP.h b/nptl/semaphoreP.h
index e7e1c9763f..f25ba329d7 100644
--- a/nptl/semaphoreP.h
+++ b/nptl/semaphoreP.h
@@ -52,3 +52,16 @@ extern int __new_sem_wait (sem_t *sem);
 extern int __old_sem_wait (sem_t *sem);
 extern int __new_sem_trywait (sem_t *sem);
 extern int __new_sem_getvalue (sem_t *sem, int *sval);
+
+#if __TIMESIZE == 64
+# define __sem_clockwait64 __sem_clockwait
+# define __sem_timedwait64 __sem_timedwait
+#else
+extern int
+__sem_clockwait64 (sem_t *sem, clockid_t clockid,
+                   const struct __timespec64 *abstime);
+libpthread_hidden_proto (__sem_clockwait64)
+extern int
+__sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime);
+libpthread_hidden_proto (__sem_timedwait64)
+#endif