// Save LR and REGCTXT
		const frameSize = 16
		p = ctxt.StartUnsafePoint(p, newprog)

		// Spill Arguments. This has to happen before we open
		// any more frame space.
		p = cursym.Func().SpillRegisterArgs(p, newprog)

		// MOV LR, -16(SP)
		p = obj.Appendp(p, newprog)
		p.As = AMOV
		p.From = obj.Addr{Type: obj.TYPE_REG, Reg: REG_LR}
		p.To = obj.Addr{Type: obj.TYPE_MEM, Reg: REG_SP, Offset: -frameSize}