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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2021-02-17 13:35:19 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2021-06-15 10:42:11 -0300
commit47f24c21ee38701ae275aa9e451f70fa3e77478c (patch)
treeb4cc52206173fb2ed427a1e797769d12369a89ad /time/sys
parent8af344feb5ae3e6e3374a6cf2175b44cc904a94e (diff)
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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>
Diffstat (limited to 'time/sys')
-rw-r--r--time/sys/time.h71
1 files changed, 71 insertions, 0 deletions
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