kernel/entry.S [527:532]:
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	SAVE_STATE		/* Save registers.*/
	/* PC, before IRQ/trap - this is one instruction above */
	swi	r17, r1, PT_PC;
	tovirt(r1,r1)
	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
	addik	r15, r0, ret_from_exc-8
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kernel/entry.S [557:562]:
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	SAVE_STATE		/* Save registers.*/
	/* PC, before IRQ/trap - this is one instruction above */
	swi	r17, r1, PT_PC;
	tovirt(r1,r1)
	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
	addik	r15, r0, ret_from_exc-8
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