From 47f24c21ee38701ae275aa9e451f70fa3e77478c Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Wed, 17 Feb 2021 13:35:19 -0300
Subject: 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>
---
 sysdeps/unix/sysv/linux/include/sys/msg.h   | 2 --
 sysdeps/unix/sysv/linux/include/sys/shm.h   | 2 --
 sysdeps/unix/sysv/linux/include/sys/timex.h | 1 +
 3 files changed, 1 insertion(+), 4 deletions(-)

(limited to 'sysdeps/unix/sysv/linux/include')

diff --git a/sysdeps/unix/sysv/linux/include/sys/msg.h b/sysdeps/unix/sysv/linux/include/sys/msg.h
index 522903f818..c460be0dc9 100644
--- a/sysdeps/unix/sysv/linux/include/sys/msg.h
+++ b/sysdeps/unix/sysv/linux/include/sys/msg.h
@@ -7,8 +7,6 @@ extern ssize_t __libc_msgrcv (int msqid, void *msgp, size_t msgsz,
 extern int __libc_msgsnd (int msqid, const void *msgp, size_t msgsz,
 			  int msgflg);
 
-# include <bits/types/struct_msqid64_ds.h>
-
 # if __TIMESIZE == 64
 #  define __msgctl64 __msgctl
 # else
diff --git a/sysdeps/unix/sysv/linux/include/sys/shm.h b/sysdeps/unix/sysv/linux/include/sys/shm.h
index 530a1cdfc9..85177a632d 100644
--- a/sysdeps/unix/sysv/linux/include/sys/shm.h
+++ b/sysdeps/unix/sysv/linux/include/sys/shm.h
@@ -3,8 +3,6 @@
 
 #ifndef _ISOMAC
 
-# include <bits/types/struct_shmid64_ds.h>
-
 # if __TIMESIZE == 64
 #  define __shmctl64 __shmctl
 # else
diff --git a/sysdeps/unix/sysv/linux/include/sys/timex.h b/sysdeps/unix/sysv/linux/include/sys/timex.h
index e136ed172e..ec03813795 100644
--- a/sysdeps/unix/sysv/linux/include/sys/timex.h
+++ b/sysdeps/unix/sysv/linux/include/sys/timex.h
@@ -23,6 +23,7 @@
 
 # ifndef _ISOMAC
 
+extern int __adjtimex (struct timex *__ntx);
 libc_hidden_proto (__adjtimex)
 
 #  include <time.h>
-- 
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