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

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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>
This commit is contained in:
Adhemerval Zanella
2021-02-17 13:35:19 -03:00
parent 8af344feb5
commit 47f24c21ee
118 changed files with 2387 additions and 61 deletions
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71
time/sys/time.h
View File

@@ -63,10 +63,21 @@ struct timezone
use localtime etc. instead.
This function itself is semi-obsolete;
most callers should use time or clock_gettime instead. */
#ifndef __USE_TIME_BITS64
extern int gettimeofday (struct timeval *__restrict __tv,
void *__restrict __tz) __THROW __nonnull ((1));
#else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (gettimeofday, (struct timeval *__restrict __tv,
void *__restrict __tz),
__gettimeofday64) __nonnull ((1));
# else
# define gettimeofday __gettimeofday64
# endif
#endif
#ifdef __USE_MISC
# ifndef __USE_TIME_BITS64
/* Set the current time of day and timezone information.
This call is restricted to the super-user.
Setting the timezone in this way is obsolete, but we don't yet
@@ -82,6 +93,20 @@ extern int settimeofday (const struct timeval *__tv,
This call is restricted to the super-user. */
extern int adjtime (const struct timeval *__delta,
struct timeval *__olddelta) __THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (settimeofday, (const struct timeval *__tv,
const struct timezone *__tz),
__settimeofday64);
extern int __REDIRECT_NTH (adjtime, (const struct timeval *__delta,
struct timeval *__olddelta),
__adjtime64);
# else
# define settimeofday __settimeofday64
# define adjtime __adjtime64
# endif
# endif
#endif
@@ -118,6 +143,7 @@ typedef enum __itimer_which __itimer_which_t;
typedef int __itimer_which_t;
#endif
#ifndef __USE_TIME_BITS64
/* Set *VALUE to the current setting of timer WHICH.
Return 0 on success, -1 on errors. */
extern int getitimer (__itimer_which_t __which,
@@ -136,21 +162,66 @@ extern int setitimer (__itimer_which_t __which,
extern int utimes (const char *__file, const struct timeval __tvp[2])
__THROW __nonnull ((1));
#else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (getitimer, (__itimer_which_t __which,
struct itimerval *__value),
__getitimer64);
extern int __REDIRECT_NTH (setitimer, (__itimer_which_t __which,
const struct itimerval *__restrict __new,
struct itimerval *__restrict __old),
__setitimer64);
extern int __REDIRECT_NTH (utimes, (const char *__file,
const struct timeval __tvp[2]),
__utimes64) __nonnull ((1));
# else
# define getitimer __getitimer64
# define setitimer __setitimer64
# define utimes __utimes64
# endif
#endif
#ifdef __USE_MISC
# ifndef __USE_TIME_BITS64
/* Same as `utimes', but does not follow symbolic links. */
extern int lutimes (const char *__file, const struct timeval __tvp[2])
__THROW __nonnull ((1));
/* Same as `utimes', but takes an open file descriptor instead of a name. */
extern int futimes (int __fd, const struct timeval __tvp[2]) __THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (lutimes, (const char *__file,
const struct timeval __tvp[2]),
__lutimes64) __nonnull ((1));
extern int __REDIRECT_NTH (futimes, (int __fd, const struct timeval __tvp[2]),
__futimes64);
# else
# define lutimes __lutimes64
# define futimes __futimes64
# endif
# endif
#endif
#ifdef __USE_GNU
# ifndef __USE_TIME_BITS64
/* Change the access time of FILE relative to FD to TVP[0] and the
modification time of FILE to TVP[1]. If TVP is a null pointer, use
the current time instead. Returns 0 on success, -1 on errors. */
extern int futimesat (int __fd, const char *__file,
const struct timeval __tvp[2]) __THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (futimesat, (int __fd, const char *__file,
const struct timeval __tvp[2]),
__futimesat64);
# else
# define futimesat __futimesat64
# endif
# endif
#endif