From 47f24c21ee38701ae275aa9e451f70fa3e77478c Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella 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 Reviewed-by: Carlos O'Donell Tested-by: Carlos O'Donell --- time/sys/time.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) (limited to 'time/sys/time.h') diff --git a/time/sys/time.h b/time/sys/time.h index 42f91f186b..d21411c0b4 100644 --- a/time/sys/time.h +++ b/time/sys/time.h @@ -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 -- cgit 1.4.1