EXCEPTION_LOAD_GPR4  104 arch/openrisc/kernel/head.S #define EXCEPTION_LOAD_GPR4		l.mfspr r4,r0,SPR_SHADOW_GPR(4)
EXCEPTION_LOAD_GPR4  120 arch/openrisc/kernel/head.S #define EXCEPTION_LOAD_GPR4		l.lwz   r4,0x6c(r0)