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📄 Makefile.inc(10.5 KB)
📄 Symbol.map(14.62 KB)
📄 __error.c(1.92 KB)
📄 __vdso_gettimeofday.c(4.46 KB)
📄 _exit.2(3.63 KB)
📄 _umtx_op.2(39.07 KB)
📄 abort2.2(3.05 KB)
📄 accept.2(6.12 KB)
📄 accept.c(1.96 KB)
📄 accept4.c(1.99 KB)
📄 access.2(6.76 KB)
📄 acct.2(4.23 KB)
📄 adjtime.2(3.48 KB)
📄 aio_cancel.2(3.31 KB)
📄 aio_error.2(2.76 KB)
📄 aio_fsync.2(5.05 KB)
📄 aio_mlock.2(3.97 KB)
📄 aio_read.2(6.56 KB)
📄 aio_return.2(2.91 KB)
📄 aio_suspend.2(3.2 KB)
📄 aio_suspend.c(2.02 KB)
📄 aio_waitcomplete.2(3.71 KB)
📄 aio_write.2(6.52 KB)
📄 bind.2(4.41 KB)
📄 bindat.2(2.99 KB)
📄 brk.2(4.74 KB)
📄 brk.c(2.76 KB)
📄 cap_enter.2(4.78 KB)
📄 cap_fcntls_limit.2(3.38 KB)
📄 cap_ioctls_limit.2(4.42 KB)
📄 cap_rights_limit.2(4.27 KB)
📄 chdir.2(3.88 KB)
📄 chflags.2(9.61 KB)
📄 chmod.2(9.27 KB)
📄 chown.2(6.94 KB)
📄 chroot.2(4.89 KB)
📄 clock_gettime.2(5.29 KB)
📄 clock_gettime.c(1.94 KB)
📄 clock_nanosleep.c(2.06 KB)
📄 close.2(4.32 KB)
📄 close.c(1.86 KB)
📄 closefrom.2(2.63 KB)
📄 closefrom.c(1.75 KB)
📄 compat-ino64.h(3.41 KB)
📄 compat-stub.c(2.33 KB)
📄 connect.2(5.59 KB)
📄 connect.c(1.97 KB)
📄 connectat.2(3 KB)
📄 copy_file_range.2(4.89 KB)
📄 cpuset.2(6.94 KB)
📄 cpuset_getaffinity.2(4.82 KB)
📄 cpuset_getdomain.2(5.46 KB)
📄 dup.2(4.09 KB)
📄 eventfd.2(5.29 KB)
📄 execve.2(10.77 KB)
📄 extattr_get_file.2(8.32 KB)
📄 fcntl.2(17.85 KB)
📄 fcntl.c(2.06 KB)
📄 fdatasync.c(1.8 KB)
📄 ffclock.2(6.31 KB)
📄 fhlink.2(5.67 KB)
📄 fhopen.2(3.78 KB)
📄 fhreadlink.2(2.63 KB)
📄 flock.2(4.92 KB)
📄 fork.2(4.55 KB)
📄 fork.c(1.83 KB)
📄 fstat.c(1.83 KB)
📄 fstatat.c(1.82 KB)
📄 fstatfs.c(1.86 KB)
📄 fsync.2(3.69 KB)
📄 fsync.c(1.84 KB)
📄 getdents.c(1.76 KB)
📄 getdirentries.2(5.53 KB)
📄 getdirentries.c(3.87 KB)
📄 getdtablesize.2(2.29 KB)
📄 getfh.2(5.13 KB)
📄 getfsstat.2(3.71 KB)
📄 getfsstat.c(2.23 KB)
📄 getgid.2(2.67 KB)
📄 getgroups.2(3.14 KB)
📄 getitimer.2(4.86 KB)
📄 getlogin.2(5.46 KB)
📄 getloginclass.2(2.94 KB)
📄 getpeername.2(2.96 KB)
📄 getpgrp.2(3.85 KB)
📄 getpid.2(2.57 KB)
📄 getpriority.2(3.84 KB)
📄 getrandom.2(3.39 KB)
📄 getrlimit.2(7.42 KB)
📄 getrusage.2(6 KB)
📄 getsid.2(2.36 KB)
📄 getsockname.2(2.94 KB)
📄 getsockopt.2(18.1 KB)
📄 gettimeofday.2(3.99 KB)
📄 gettimeofday.c(1.83 KB)
📄 getuid.2(2.69 KB)
📄 interposing_table.c(3.35 KB)
📄 intro.2(27.98 KB)
📄 ioctl.2(4.27 KB)
📄 issetugid.2(3.36 KB)
📄 jail.2(9.56 KB)
📄 kenv.2(4.2 KB)
📄 kevent.c(2.12 KB)
📄 kill.2(4.53 KB)
📄 kldfind.2(2.34 KB)
📄 kldfirstmod.2(2.2 KB)
📄 kldload.2(2.65 KB)
📄 kldnext.2(2.41 KB)
📄 kldstat.2(3.48 KB)
📄 kldsym.2(2.99 KB)
📄 kldunload.2(2.61 KB)
📄 kqueue.2(21.15 KB)
📄 ktrace.2(6.26 KB)
📄 link.2(7.32 KB)
📄 lio_listio.2(4.8 KB)
📄 listen.2(5.43 KB)
📄 lseek.2(6.34 KB)
📄 lstat.c(1.88 KB)
📄 madvise.2(6.32 KB)
📄 mincore.2(4.49 KB)
📄 minherit.2(4.62 KB)
📄 mkdir.2(5.28 KB)
📄 mkfifo.2(5.21 KB)
📄 mknod.2(5.17 KB)
📄 mknod.c(1.71 KB)
📄 mlock.2(5.6 KB)
📄 mlockall.2(4.55 KB)
📄 mmap.2(15.29 KB)
📄 modfind.2(2.37 KB)
📄 modnext.2(2.48 KB)
📄 modstat.2(3.23 KB)
📄 mount.2(10.66 KB)
📄 mprotect.2(3.52 KB)
📄 mq_close.2(3.85 KB)
📄 mq_getattr.2(4.32 KB)
📄 mq_notify.2(5.7 KB)
📄 mq_open.2(9.36 KB)
📄 mq_receive.2(6.92 KB)
📄 mq_send.2(7.06 KB)
📄 mq_setattr.2(4.3 KB)
📄 msgctl.2(5.66 KB)
📄 msgget.2(4.06 KB)
📄 msgrcv.2(5.31 KB)
📄 msgsnd.2(4.62 KB)
📄 msync.2(3.5 KB)
📄 msync.c(1.92 KB)
📄 munmap.2(2.47 KB)
📄 nanosleep.2(5.15 KB)
📄 nanosleep.c(1.95 KB)
📄 nfssvc.2(6.66 KB)
📄 ntp_adjtime.2(8.96 KB)
📄 open.2(15.7 KB)
📄 open.c(2.07 KB)
📄 openat.c(2.21 KB)
📄 pathconf.2(7.65 KB)
📄 pdfork.2(4.97 KB)
📄 pdfork.c(1.83 KB)
📄 pipe.2(4.52 KB)
📄 pipe.c(1.79 KB)
📄 poll.2(6.82 KB)
📄 poll.c(1.91 KB)
📄 posix_fadvise.2(4.3 KB)
📄 posix_fallocate.2(4.21 KB)
📄 posix_openpt.2(4.32 KB)
📄 ppoll.c(2.04 KB)
📄 procctl.2(20.29 KB)
📄 profil.2(3.7 KB)
📄 pselect.2(3.3 KB)
📄 pselect.c(2.03 KB)
📄 ptrace.2(28.87 KB)
📄 ptrace.c(1.87 KB)
📄 quotactl.2(6.9 KB)
📄 rctl_add_rule.2(5.74 KB)
📄 read.2(7.23 KB)
📄 read.c(1.92 KB)
📄 readlink.2(4.33 KB)
📄 readv.c(1.97 KB)
📄 reboot.2(5.31 KB)
📄 recv.2(9.94 KB)
📄 recvfrom.c(2.08 KB)
📄 recvmsg.c(1.94 KB)
📄 rename.2(8.36 KB)
📄 revoke.2(3.76 KB)
📄 rfork.2(5.15 KB)
📄 rmdir.2(3.71 KB)
📄 rtprio.2(6.11 KB)
📄 sched_get_priority_max.2(3.59 KB)
📄 sched_setparam.2(5.34 KB)
📄 sched_setscheduler.2(4.62 KB)
📄 sched_yield.2(1.97 KB)
📄 sctp_generic_recvmsg.2(2.57 KB)
📄 sctp_generic_sendmsg.2(2.86 KB)
📄 sctp_peeloff.2(2.49 KB)
📄 select.2(5.9 KB)
📄 select.c(1.96 KB)
📄 semctl.2(5.36 KB)
📄 semget.2(3.99 KB)
📄 semop.2(6.98 KB)
📄 send.2(7.81 KB)
📄 sendfile.2(10.57 KB)
📄 sendmsg.c(1.95 KB)
📄 sendto.c(2.06 KB)
📄 setcontext.c(2.04 KB)
📄 setfib.2(3.03 KB)
📄 setgroups.2(3.19 KB)
📄 setpgid.2(3.42 KB)
📄 setregid.2(3.09 KB)
📄 setresuid.2(2.55 KB)
📄 setreuid.2(3.04 KB)
📄 setsid.2(2.81 KB)
📄 setuid.2(5.49 KB)
📄 shm_open.2(10.56 KB)
📄 shm_open.c(4.58 KB)
📄 shmat.2(3.7 KB)
📄 shmctl.2(4.33 KB)
📄 shmget.2(3.82 KB)
📄 shutdown.2(4.63 KB)
📄 sigaction.2(19.07 KB)
📄 sigaction.c(2.01 KB)
📄 sigaltstack.2(5.04 KB)
📄 sigfastblock.2(5.45 KB)
📄 sigpending.2(2.58 KB)
📄 sigprocmask.2(3.57 KB)
📄 sigprocmask.c(2 KB)
📄 sigqueue.2(4.43 KB)
📄 sigreturn.2(3.01 KB)
📄 sigstack.2(1.97 KB)
📄 sigsuspend.2(2.89 KB)
📄 sigsuspend.c(1.94 KB)
📄 sigtimedwait.c(2.03 KB)
📄 sigwait.2(3.65 KB)
📄 sigwait.c(1.87 KB)
📄 sigwaitinfo.2(5.22 KB)
📄 sigwaitinfo.c(1.95 KB)
📄 socket.2(9.3 KB)
📄 socketpair.2(3.13 KB)
📄 stat.2(11.23 KB)
📄 stat.c(1.86 KB)
📄 statfs.2(6.99 KB)
📄 statfs.c(1.79 KB)
📄 swapcontext.c(2.07 KB)
📄 swapon.2(4.11 KB)
📄 symlink.2(5.61 KB)
📄 sync.2(2.47 KB)
📄 sysarch.2(2.71 KB)
📄 syscall.2(2.72 KB)
📄 thr_exit.2(2.75 KB)
📄 thr_kill.2(3.59 KB)
📄 thr_new.2(6.85 KB)
📄 thr_self.2(2.79 KB)
📄 thr_set_name.2(2.89 KB)
📄 thr_suspend.2(3.58 KB)
📄 thr_wake.2(3.36 KB)
📄 timer_create.2(4.93 KB)
📄 timer_delete.2(2.39 KB)
📄 timer_settime.2(7.16 KB)
📄 trivial-vdso_tc.c(1.67 KB)
📄 truncate.2(4.62 KB)
📄 umask.2(2.71 KB)
📄 undelete.2(3.56 KB)
📄 unlink.2(7.26 KB)
📄 utimensat.2(7.73 KB)
📄 utimes.2(6.78 KB)
📄 utrace.2(2.44 KB)
📄 uuidgen.2(5 KB)
📄 vadvise.c(1.76 KB)
📄 vfork.2(3.94 KB)
📄 wait.2(14.9 KB)
📄 wait4.c(1.94 KB)
📄 wait6.c(2.04 KB)
📄 write.2(7.16 KB)
📄 write.c(1.94 KB)
📄 writev.c(1.97 KB)

Editing: __vdso_gettimeofday.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/elf.h>
#include <sys/time.h>
#include <sys/vdso.h>
#include <errno.h>
#include <strings.h>
#include <time.h>
#include <machine/atomic.h>
#include "libc_private.h"

static int
tc_delta(const struct vdso_timehands *th, u_int *delta)
{
	int error;
	u_int tc;

error = __vdso_gettc(th, &tc);
	if (error == 0)
		*delta = (tc - th->th_offset_count) & th->th_counter_mask;
	return (error);
}

/*
 * Calculate the absolute or boot-relative time from the
 * machine-specific fast timecounter and the published timehands
 * structure read from the shared page.
 *
 * The lockless reading scheme is similar to the one used to read the
 * in-kernel timehands, see sys/kern/kern_tc.c:binuptime().  This code
 * is based on the kernel implementation.
 */
static int
binuptime(struct bintime *bt, struct vdso_timekeep *tk, int abs)
{
	struct vdso_timehands *th;
	uint32_t curr, gen;
	uint64_t scale, x;
	u_int delta, scale_bits;
	int error;

do {
		if (!tk->tk_enabled)
			return (ENOSYS);

curr = atomic_load_acq_32(&tk->tk_current);
		th = &tk->tk_th[curr];
		gen = atomic_load_acq_32(&th->th_gen);
		*bt = th->th_offset;
		error = tc_delta(th, &delta);
		if (error == EAGAIN)
			continue;
		if (error != 0)
			return (error);
		scale = th->th_scale;
#ifdef _LP64
		scale_bits = ffsl(scale);
#else
		scale_bits = ffsll(scale);
#endif
		if (__predict_false(scale_bits + fls(delta) > 63)) {
			x = (scale >> 32) * delta;
			scale &= 0xffffffff;
			bt->sec += x >> 32;
			bintime_addx(bt, x << 32);
		}
		bintime_addx(bt, scale * delta);
		if (abs)
			bintime_add(bt, &th->th_boottime);

/*
		 * Ensure that the load of th_offset is completed
		 * before the load of th_gen.
		 */
		atomic_thread_fence_acq();
	} while (curr != tk->tk_current || gen == 0 || gen != th->th_gen);
	return (0);
}

static struct vdso_timekeep *tk;

#pragma weak __vdso_gettimeofday
int
__vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
{
	struct bintime bt;
	int error;

if (tz != NULL)
		return (ENOSYS);
	if (tk == NULL) {
		error = __vdso_gettimekeep(&tk);
		if (error != 0 || tk == NULL)
			return (ENOSYS);
	}
	if (tk->tk_ver != VDSO_TK_VER_CURR)
		return (ENOSYS);
	error = binuptime(&bt, tk, 1);
	if (error != 0)
		return (error);
	bintime2timeval(&bt, tv);
	return (0);
}

#pragma weak __vdso_clock_gettime
int
__vdso_clock_gettime(clockid_t clock_id, struct timespec *ts)
{
	struct bintime bt;
	int abs, error;

if (tk == NULL) {
		error = _elf_aux_info(AT_TIMEKEEP, &tk, sizeof(tk));
		if (error != 0 || tk == NULL)
			return (ENOSYS);
	}
	if (tk->tk_ver != VDSO_TK_VER_CURR)
		return (ENOSYS);
	switch (clock_id) {
	case CLOCK_REALTIME:
	case CLOCK_REALTIME_PRECISE:
	case CLOCK_REALTIME_FAST:
	case CLOCK_SECOND:
		abs = 1;
		break;
	case CLOCK_MONOTONIC:
	case CLOCK_MONOTONIC_PRECISE:
	case CLOCK_MONOTONIC_FAST:
	case CLOCK_UPTIME:
	case CLOCK_UPTIME_PRECISE:
	case CLOCK_UPTIME_FAST:
		abs = 0;
		break;
	default:
		return (ENOSYS);
	}
	error = binuptime(&bt, tk, abs);
	if (error != 0)
		return (error);
	bintime2timespec(&bt, ts);
	if (clock_id == CLOCK_SECOND)
		ts->tv_nsec = 0;
	return (0);
}

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Editing: __vdso_gettimeofday.c

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