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	*/			*/
	void			void
	cpu_copy_thread(struct thread td, struct thread td0)			cpu_copy_thread(struct thread td, struct thread td0)
	{			{
	struct pcb *pcb2;			struct pcb *pcb2;

	pcb2 = td->td_pcb;			pcb2 = td->td_pcb;

				/* Ensure that td0's pcb is up to date. */
				fpuexit(td0);
				if (td0 == curthread)
				update_pcb_bases(td0->td_pcb);

	/*			/*
	* Copy the upcall pcb. This loads kernel regs.			* Copy the upcall pcb. This loads kernel regs.
	* Those not loaded individually below get their default			* Those not loaded individually below get their default
	* values here.			* values here.
	*/			*/
	if (td0 == curthread)
	update_pcb_bases(td0->td_pcb);
	bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));			bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
	clear_pcb_flags(pcb2, PCB_FPUINITDONE \| PCB_USERFPUINITDONE \|			clear_pcb_flags(pcb2, PCB_KERNFPU);
	PCB_KERNFPU);
	pcb2->pcb_save = get_pcb_user_save_pcb(pcb2);			pcb2->pcb_save = get_pcb_user_save_pcb(pcb2);
	bcopy(get_pcb_user_save_td(td0), pcb2->pcb_save,			bcopy(get_pcb_user_save_td(td0), pcb2->pcb_save,
	cpu_max_ext_state_size);			cpu_max_ext_state_size);
	set_pcb_flags_raw(pcb2, PCB_FULL_IRET);			set_pcb_flags_raw(pcb2, PCB_FULL_IRET);

	/*			/*
	* Create a new fresh stack for the new thread.			* Create a new fresh stack for the new thread.
	*/			*/
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