y2038: Add support for 64-bit time on legacy ABIs

A new build flag, _TIME_BITS, enables the usage of the newer 64-bit
time symbols for legacy ABI (where 32-bit time_t is default).  The 64
bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is
also used.

Different than LFS support, the y2038 symbols are added only for the
required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32,
mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh).  The ABIs with
64-bit time support are unchanged, both for symbol and types
redirection.

On Linux the full 64-bit time support requires a minimum of kernel
version v5.1.  Otherwise, the 32-bit fallbacks are used and might
results in error with overflow return code (EOVERFLOW).

The i686-gnu does not yet support 64-bit time.

This patch exports following rediretions to support 64-bit time:

  * libc:
    adjtime
    adjtimex
    clock_adjtime
    clock_getres
    clock_gettime
    clock_nanosleep
    clock_settime
    cnd_timedwait
    ctime
    ctime_r
    difftime
    fstat
    fstatat
    futimens
    futimes
    futimesat
    getitimer
    getrusage
    gettimeofday
    gmtime
    gmtime_r
    localtime
    localtime_r
    lstat_time
    lutimes
    mktime
    msgctl
    mtx_timedlock
    nanosleep
    nanosleep
    ntp_gettime
    ntp_gettimex
    ppoll
    pselec
    pselect
    pthread_clockjoin_np
    pthread_cond_clockwait
    pthread_cond_timedwait
    pthread_mutex_clocklock
    pthread_mutex_timedlock
    pthread_rwlock_clockrdlock
    pthread_rwlock_clockwrlock
    pthread_rwlock_timedrdlock
    pthread_rwlock_timedwrlock
    pthread_timedjoin_np
    recvmmsg
    sched_rr_get_interval
    select
    sem_clockwait
    semctl
    semtimedop
    sem_timedwait
    setitimer
    settimeofday
    shmctl
    sigtimedwait
    stat
    thrd_sleep
    time
    timegm
    timerfd_gettime
    timerfd_settime
    timespec_get
    utime
    utimensat
    utimes
    utimes
    wait3
    wait4

  * librt:
    aio_suspend
    mq_timedreceive
    mq_timedsend
    timer_gettime
    timer_settime

  * libanl:
    gai_suspend

Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>

10 files changed, 22 insertions, 24 deletions

diff --git a/nptl/pthread_clockjoin.c b/nptl/pthread_clockjoin.c
index f5007d7..2d01ba0 100644
--- a/nptl/pthread_clockjoin.c
+++ b/nptl/pthread_clockjoin.c
@@ -36,7 +36,8 @@ ___pthread_clockjoin_np64 (pthread_t threadid, void **thread_return,
 #if __TIMESIZE == 64
 strong_alias (___pthread_clockjoin_np64, ___pthread_clockjoin_np)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_clockjoin_np64, __pthread_clockjoin_np64)
+strong_alias (___pthread_clockjoin_np64, __pthread_clockjoin_np64)
+libc_hidden_def (__pthread_clockjoin_np64)
 
 int
 ___pthread_clockjoin_np (pthread_t threadid, void **thread_return,
diff --git a/nptl/pthread_cond_wait.c b/nptl/pthread_cond_wait.c
index 409a99e..daba860 100644
--- a/nptl/pthread_cond_wait.c
+++ b/nptl/pthread_cond_wait.c
@@ -647,10 +647,8 @@ ___pthread_cond_timedwait64 (pthread_cond_t *cond, pthread_mutex_t *mutex,
 #if __TIMESIZE == 64
 strong_alias (___pthread_cond_timedwait64, ___pthread_cond_timedwait)
 #else
-libc_hidden_ver (___pthread_cond_timedwait64, __pthread_cond_timedwait64)
-#ifndef SHARED
 strong_alias (___pthread_cond_timedwait64, __pthread_cond_timedwait64)
-#endif
+libc_hidden_def (__pthread_cond_timedwait64)
 
 int
 ___pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
@@ -688,9 +686,8 @@ ___pthread_cond_clockwait64 (pthread_cond_t *cond, pthread_mutex_t *mutex,
 #if __TIMESIZE == 64
 strong_alias (___pthread_cond_clockwait64, ___pthread_cond_clockwait)
 #else
-versioned_symbol (libc, ___pthread_cond_clockwait64,
-		  __pthread_cond_clockwait64, GLIBC_PRIVATE);
-libc_hidden_ver (___pthread_cond_clockwait64, __pthread_cond_clockwait64)
+strong_alias (___pthread_cond_clockwait64, __pthread_cond_clockwait64);
+libc_hidden_def (__pthread_cond_clockwait64)
 
 int
 ___pthread_cond_clockwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
diff --git a/nptl/pthread_mutex_timedlock.c b/nptl/pthread_mutex_timedlock.c
index acd7813..5afd622 100644
--- a/nptl/pthread_mutex_timedlock.c
+++ b/nptl/pthread_mutex_timedlock.c
@@ -585,7 +585,8 @@ ___pthread_mutex_clocklock64 (pthread_mutex_t *mutex,
 #if __TIMESIZE == 64
 strong_alias (___pthread_mutex_clocklock64, ___pthread_mutex_clocklock)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_mutex_clocklock64, __pthread_mutex_clocklock64)
+strong_alias (___pthread_mutex_clocklock64, __pthread_mutex_clocklock64)
+libc_hidden_def (__pthread_mutex_clocklock64)
 
 int
 ___pthread_mutex_clocklock (pthread_mutex_t *mutex,
@@ -618,9 +619,8 @@ ___pthread_mutex_timedlock64 (pthread_mutex_t *mutex,
 #if __TIMESIZE == 64
 strong_alias (___pthread_mutex_timedlock64, ___pthread_mutex_timedlock)
 #else /* __TIMESPEC64 != 64 */
-versioned_symbol (libc, ___pthread_mutex_timedlock64,
-		  __pthread_mutex_timedlock64, GLIBC_PRIVATE);
-libc_hidden_ver (___pthread_mutex_timedlock64, __pthread_mutex_timedlock64)
+strong_alias (___pthread_mutex_timedlock64, __pthread_mutex_timedlock64);
+libc_hidden_def (__pthread_mutex_timedlock64)
 
 int
 ___pthread_mutex_timedlock (pthread_mutex_t *mutex,
diff --git a/nptl/pthread_rwlock_clockrdlock.c b/nptl/pthread_rwlock_clockrdlock.c
index 9db96b9..83ae1d1 100644
--- a/nptl/pthread_rwlock_clockrdlock.c
+++ b/nptl/pthread_rwlock_clockrdlock.c
@@ -31,8 +31,8 @@ ___pthread_rwlock_clockrdlock64 (pthread_rwlock_t *rwlock, clockid_t clockid,
 #if __TIMESIZE == 64
 strong_alias (___pthread_rwlock_clockrdlock64, ___pthread_rwlock_clockrdlock)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_rwlock_clockrdlock64,
-		 __pthread_rwlock_clockrdlock64)
+strong_alias (___pthread_rwlock_clockrdlock64, __pthread_rwlock_clockrdlock64)
+libc_hidden_def (__pthread_rwlock_clockrdlock64)
 
 int
 ___pthread_rwlock_clockrdlock (pthread_rwlock_t *rwlock, clockid_t clockid,
diff --git a/nptl/pthread_rwlock_clockwrlock.c b/nptl/pthread_rwlock_clockwrlock.c
index ca0ebe2..08a2276 100644
--- a/nptl/pthread_rwlock_clockwrlock.c
+++ b/nptl/pthread_rwlock_clockwrlock.c
@@ -31,8 +31,8 @@ ___pthread_rwlock_clockwrlock64 (pthread_rwlock_t *rwlock, clockid_t clockid,
 #if __TIMESIZE == 64
 strong_alias (___pthread_rwlock_clockwrlock64, ___pthread_rwlock_clockwrlock)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_rwlock_clockwrlock64,
-		 __pthread_rwlock_clockwrlock64)
+strong_alias (___pthread_rwlock_clockwrlock64, __pthread_rwlock_clockwrlock64)
+libc_hidden_def (__pthread_rwlock_clockwrlock64)
 
 int
 ___pthread_rwlock_clockwrlock (pthread_rwlock_t *rwlock, clockid_t clockid,
diff --git a/nptl/pthread_rwlock_timedrdlock.c b/nptl/pthread_rwlock_timedrdlock.c
index dd9b7cb..8c73af2 100644
--- a/nptl/pthread_rwlock_timedrdlock.c
+++ b/nptl/pthread_rwlock_timedrdlock.c
@@ -30,8 +30,8 @@ ___pthread_rwlock_timedrdlock64 (pthread_rwlock_t *rwlock,
 #if __TIMESIZE == 64
 strong_alias (___pthread_rwlock_timedrdlock64, ___pthread_rwlock_timedrdlock)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_rwlock_timedrdlock64,
-		 __pthread_rwlock_timedrdlock64)
+strong_alias (___pthread_rwlock_timedrdlock64, __pthread_rwlock_timedrdlock64)
+libc_hidden_def (__pthread_rwlock_timedrdlock64)
 
 int
 ___pthread_rwlock_timedrdlock (pthread_rwlock_t *rwlock,
diff --git a/nptl/pthread_rwlock_timedwrlock.c b/nptl/pthread_rwlock_timedwrlock.c
index e660a54..890da92 100644
--- a/nptl/pthread_rwlock_timedwrlock.c
+++ b/nptl/pthread_rwlock_timedwrlock.c
@@ -30,8 +30,8 @@ ___pthread_rwlock_timedwrlock64 (pthread_rwlock_t *rwlock,
 #if __TIMESIZE == 64
 strong_alias (___pthread_rwlock_timedwrlock64, ___pthread_rwlock_timedwrlock)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_rwlock_timedwrlock64,
-		 __pthread_rwlock_timedwrlock64)
+strong_alias (___pthread_rwlock_timedwrlock64, __pthread_rwlock_timedwrlock64)
+libc_hidden_def (__pthread_rwlock_timedwrlock64)
 
 int
 ___pthread_rwlock_timedwrlock (pthread_rwlock_t *rwlock,
diff --git a/nptl/pthread_timedjoin.c b/nptl/pthread_timedjoin.c
index ebc31f9..0b40266 100644
--- a/nptl/pthread_timedjoin.c
+++ b/nptl/pthread_timedjoin.c
@@ -31,7 +31,8 @@ ___pthread_timedjoin_np64 (pthread_t threadid, void **thread_return,
 #if __TIMESIZE == 64
 strong_alias (___pthread_timedjoin_np64, ___pthread_timedjoin_np)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___pthread_timedjoin_np64, __pthread_timedjoin_np64)
+strong_alias (___pthread_timedjoin_np64, __pthread_timedjoin_np64)
+libc_hidden_def (__pthread_timedjoin_np64)
 
 int
   ___pthread_timedjoin_np (pthread_t threadid, void **thread_return,
diff --git a/nptl/sem_clockwait.c b/nptl/sem_clockwait.c
index 2739799..19751af 100644
--- a/nptl/sem_clockwait.c
+++ b/nptl/sem_clockwait.c
@@ -49,7 +49,8 @@ ___sem_clockwait64 (sem_t *sem, clockid_t clockid,
 #if __TIMESIZE == 64
 strong_alias (___sem_clockwait64, ___sem_clockwait)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___sem_clockwait64, __sem_clockwait64)
+strong_alias (___sem_clockwait64, __sem_clockwait64)
+libc_hidden_def (__sem_clockwait64)
 
 int
 ___sem_clockwait (sem_t *sem, clockid_t clockid, const struct timespec *abstime)
diff --git a/nptl/sem_timedwait.c b/nptl/sem_timedwait.c
index 584546c..5c8f37d 100644
--- a/nptl/sem_timedwait.c
+++ b/nptl/sem_timedwait.c
@@ -45,10 +45,8 @@ ___sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
 #if __TIMESIZE == 64
 strong_alias (___sem_timedwait64, ___sem_timedwait)
 #else /* __TIMESPEC64 != 64 */
-libc_hidden_ver (___sem_timedwait64, __sem_timedwait64)
-#ifndef SHARED
 strong_alias (___sem_timedwait64, __sem_timedwait64)
-#endif
+libc_hidden_def (__sem_timedwait64)
 
 int
 ___sem_timedwait (sem_t *sem, const struct timespec *abstime)