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 --- rt/aio.h | 15 ++++++++++++--- rt/mqueue.h | 22 ++++++++++++++++++++++ 2 files changed, 34 insertions(+), 3 deletions(-) (limited to 'rt') diff --git a/rt/aio.h b/rt/aio.h index 3a107b2783..72cf626690 100644 --- a/rt/aio.h +++ b/rt/aio.h @@ -193,12 +193,17 @@ extern __ssize_t __REDIRECT_NTH (aio_return, (struct aiocb *__aiocbp), extern int __REDIRECT_NTH (aio_cancel, (int __fildes, struct aiocb *__aiocbp), aio_cancel64); - +# ifdef __USE_TIME_BITS64 +extern int __REDIRECT_NTH (aio_suspend, + (const struct aiocb *const __list[], int __nent, + const struct timespec *__restrict __timeout), + __aio_suspend_time64) __nonnull ((1)); +# else extern int __REDIRECT_NTH (aio_suspend, (const struct aiocb *const __list[], int __nent, const struct timespec *__restrict __timeout), aio_suspend64) __nonnull ((1)); - +# endif extern int __REDIRECT_NTH (aio_fsync, (int __operation, struct aiocb *__aiocbp), aio_fsync64) __nonnull ((2)); @@ -210,7 +215,11 @@ extern int __REDIRECT_NTH (aio_fsync, # define aio_error aio_error64 # define aio_return aio_return64 # define aio_cancel aio_cancel64 -# define aio_suspend aio_suspend64 +# ifdef __USE_TIME_BITS64 +# define aio_suspend __aio_suspend_time64 +# else +# define aio_suspend aio_suspend64 +# endif # define aio_fsync aio_fsync64 # endif #endif diff --git a/rt/mqueue.h b/rt/mqueue.h index 8a62d99f50..e8a85637e4 100644 --- a/rt/mqueue.h +++ b/rt/mqueue.h @@ -71,6 +71,7 @@ extern int mq_send (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len, unsigned int __msg_prio) __nonnull ((2)); #ifdef __USE_XOPEN2K +# ifndef __USE_TIME_BITS64 /* Receive the oldest from highest priority messages in message queue MQDES, stop waiting if ABS_TIMEOUT expires. */ extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr, @@ -85,6 +86,27 @@ extern int mq_timedsend (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len, unsigned int __msg_prio, const struct timespec *__abs_timeout) __nonnull ((2, 5)); +# else +# ifdef __REDIRECT +extern int __REDIRECT (mq_timedreceive, (mqd_t __mqdes, + char *__restrict __msg_ptr, + size_t __msg_len, + unsigned int *__restrict __msg_prio, + const struct timespec *__restrict __abs_timeout), + __mq_timedreceive_time64) + __nonnull ((2, 5)); + +extern int __REDIRECT (mq_timedsend, (mqd_t __mqdes, + const char *__msg_ptr, size_t __msg_len, + unsigned int __msg_prio, + const struct timespec *__abs_timeout), + __mq_timedsend_time64) + __nonnull ((2, 5)); +# else +# define mq_timedreceive __mq_timedreceive_time64 +# define mq_timedsend __mq_timedsend_time64 +# endif +# endif #endif /* Define some inlines helping to catch common problems. */ -- cgit 1.4.1