Auto 54 arch/arc/include/asm/entry-arcv2.h ; 3. Auto save: (mandatory) Push PC and STAT32 on stack Auto 56 arch/arc/include/asm/entry-arcv2.h ; 4. Auto save: (optional) r0-r11, blink, LPE,LPS,LPC, JLI,LDI,EI Auto 143 arch/arc/include/asm/entry-arcv2.h ; Auto stack switch works