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a9acb7b39e
Currently glibc uses in_time_t_range to detects time_t overflow, and if it occurs fallbacks to 64 bit syscall version. The function name is confusing because internally time_t might be either 32 bits or 64 bits (depending on __TIMESIZE). This patch refactors the in_time_t_range by replacing it with in_int32_t_range for the case to check if the 64 bit time_t syscall should be used. The in_time_t range is used to detect overflow of the syscall return value. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* Copyright (C) 2003-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sysdep.h>
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#include <time.h>
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#include <shlib-compat.h>
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#include <kernel-features.h>
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/* Set CLOCK to value TP. */
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int
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__clock_settime64 (clockid_t clock_id, const struct __timespec64 *tp)
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{
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/* Make sure the time cvalue is OK. */
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if (! valid_nanoseconds (tp->tv_nsec))
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{
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__set_errno (EINVAL);
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return -1;
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}
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#ifndef __NR_clock_settime64
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# define __NR_clock_settime64 __NR_clock_settime
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#endif
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int ret = INLINE_SYSCALL_CALL (clock_settime64, clock_id, tp);
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#ifndef __ASSUME_TIME64_SYSCALLS
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if (ret == 0 || errno != ENOSYS)
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return ret;
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if (! in_int32_t_range (tp->tv_sec))
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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struct timespec ts32 = valid_timespec64_to_timespec (*tp);
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ret = INLINE_SYSCALL_CALL (clock_settime, clock_id, &ts32);
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#endif
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return ret;
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__clock_settime64)
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int
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__clock_settime (clockid_t clock_id, const struct timespec *tp)
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{
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struct __timespec64 ts64 = valid_timespec_to_timespec64 (*tp);
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return __clock_settime64 (clock_id, &ts64);
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}
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#endif
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libc_hidden_def (__clock_settime)
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versioned_symbol (libc, __clock_settime, clock_settime, GLIBC_2_17);
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/* clock_settime moved to libc in version 2.17;
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old binaries may expect the symbol version it had in librt. */
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#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
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strong_alias (__clock_settime, __clock_settime_2);
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compat_symbol (libc, __clock_settime_2, clock_settime, GLIBC_2_2);
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#endif
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