_O_CLOEXEC   = 0x80000
	_SA_RESTORER = 0
)

type stackt struct {
	ss_sp    *byte
	ss_flags int32
	ss_size  uintptr
}

type sigcontext struct {
	psw_mask uint64
	psw_addr uint64
	gregs    [16]uint64
	aregs    [16]uint32
	fpc      uint32
	fpregs   [16]uint64
}

type ucontext struct {
	uc_flags    uint64
	uc_link     *ucontext
	uc_stack    stackt
	uc_mcontext sigcontext

	var (
		frame    unsafe.Pointer
		framecap uintptr
		argRegs  int
	)

	gp := getg()
	lock(&finlock)
	fing = gp
	unlock(&finlock)

	for {
		lock(&finlock)
		fb := finq
		finq = nil
		if fb == nil {
			gopark(finalizercommit, unsafe.Pointer(&finlock), waitReasonFinalizerWait, traceBlockSystemGoroutine, 1)
			continue
		}
		argRegs = intArgRegs
		unlock(&finlock)
		if raceenabled {

	significand [4]uint16
	exponent    uint16
}

type stackt struct {
	ss_sp     *byte
	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type mcontext struct {
	gregs       [23]uint64
	fpregs      *fpstate
	__reserved1 [8]uint64
}

type ucontext struct {
	uc_flags     uint64
	uc_link      *ucontext
	uc_stack     stackt
	uc_mcontext  mcontext