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}		}

pcb2 = (struct pcb *)(td2->td_kstack +		pcb2 = (struct pcb *)(td2->td_kstack +
td2->td_kstack_pages * PAGE_SIZE) - 1;		td2->td_kstack_pages * PAGE_SIZE) - 1;

td2->td_pcb = pcb2;		td2->td_pcb = pcb2;
bcopy(td1->td_pcb, pcb2, sizeof(*pcb2));		bcopy(td1->td_pcb, pcb2, sizeof(*pcb2));

		/* Clear the debug register state. */
		bzero(&pcb2->pcb_dbg_regs, sizeof(pcb2->pcb_dbg_regs));

tf = (struct trapframe )STACKALIGN((struct trapframe )pcb2 - 1);		tf = (struct trapframe )STACKALIGN((struct trapframe )pcb2 - 1);
bcopy(td1->td_frame, tf, sizeof(*tf));		bcopy(td1->td_frame, tf, sizeof(*tf));
tf->tf_x[0] = 0;		tf->tf_x[0] = 0;
tf->tf_x[1] = 0;		tf->tf_x[1] = 0;
tf->tf_spsr = td1->td_frame->tf_spsr & (PSR_M_32 \| PSR_DAIF);		tf->tf_spsr = td1->td_frame->tf_spsr & (PSR_M_32 \| PSR_DAIF);

td2->td_frame = tf;		td2->td_frame = tf;

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