CLBR_RET_REG       16 arch/x86/include/asm/paravirt_types.h #define CLBR_RET_REG	(CLBR_EAX | CLBR_EDX)
CLBR_RET_REG       33 arch/x86/include/asm/paravirt_types.h #define CLBR_RET_REG	(CLBR_RAX)