// stackNosplit is the maximum number of bytes that a chain of NOSPLIT
	// functions can use.
	// This arithmetic must match that in cmd/internal/objabi/stack.go:StackNosplit.
	stackNosplit = abi.StackNosplitBase * sys.StackGuardMultiplier

	// The stack guard is a pointer this many bytes above the
	// bottom of the stack.
	//
	// The guard leaves enough room for a stackNosplit chain of NOSPLIT calls

		// We set hi to &size, but there are things above
		// it. The 1024 is supposed to compensate this,
		// but is somewhat arbitrary.
		size := gp.stack.hi
		if size == 0 {
			size = 16384 * sys.StackGuardMultiplier
		}
		gp.stack.hi = uintptr(noescape(unsafe.Pointer(&size)))
		gp.stack.lo = gp.stack.hi - size + 1024
	}
	// Initialize stack guard so that we can start calling regular
	// Go code.