tag	line	file	source code
FR_REG12	31	include/asm-mips/stackframe.h	#define FR_REG13  ((FR_REG12) + 4)
FR_REG12	115	include/asm-mips/stackframe.h	sw  $12,FR_REG12(sp);               \
FR_REG12	168	include/asm-mips/stackframe.h	lw  $12,FR_REG12(sp);               \