// See cmd/compile/internal/amd64/galign.go arch.MAXWIDTH initialization.
	vdsoArrayMax = 1<<50 - 1
)

var vdsoLinuxVersion = vdsoVersionKey{"LINUX_2.6", 0x3ae75f6}

var vdsoSymbolKeys = []vdsoSymbolKey{
	{"__vdso_gettimeofday", 0x315ca59, 0xb01bca00, &vdsoGettimeofdaySym},
	{"__vdso_clock_gettime", 0xd35ec75, 0x6e43a318, &vdsoClockgettimeSym},
}

var (
	vdsoGettimeofdaySym uintptr
	vdsoClockgettimeSym uintptr
)

	// an atomic_thread_fence_acq() call which behaves as an instruction reordering and
	// memory barrier.
	binuptimeDummy uint32

	zeroBintime bintime
)

// based on /usr/src/lib/libc/sys/__vdso_gettimeofday.c
//
//go:nosplit
func binuptime(abs bool) (bt bintime) {
	timehands := (*[_VDSO_TH_NUM]vdsoTimehands)(add(unsafe.Pointer(timekeepSharedPage), vdsoTimekeepSize))
	for {
		if timekeepSharedPage.enabled == 0 {