start_func: abi.FuncPCABI0(lwp_start),
		arg:        unsafe.Pointer(mp),
		stack:      uintptr(stk),
		tid1:       nil, // minit will record tid
		tid2:       nil,
	}

	// TODO: Check for error.
	retryOnEAGAIN(func() int32 {
		lwp_create(&params)
		return 0
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
}

func osinit() {
	ncpu = getncpu()
	if physPageSize == 0 {
		physPageSize = getPageSize()
	}

	}

	// Disable signals during create, so that the new thread starts
	// with signals disabled. It will enable them in minit.
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	ret := retryOnEAGAIN(func() int32 {
		return pthread_create(&tid, &attr, &tstart, unsafe.Pointer(mp))
	})
	sigprocmask(_SIG_SETMASK, &oset, nil)
	if ret != 0 {