SW_R17 92 arch/nios2/include/asm/entry.h stw r17, SW_R17(sp) SW_R17 106 arch/nios2/include/asm/entry.h ldw r17, SW_R17(sp) SW_R17 55 arch/nios2/kernel/asm-offsets.c OFFSET(SW_R17, switch_stack, r17);