CFRAME_UNWIND_FF  172 lj_err.c             return (void *)((intptr_t)cf | CFRAME_UNWIND_FF);
CFRAME_UNWIND_FF  167 lj_frame.h     #define CFRAME_RAWMASK		(~(intptr_t)(CFRAME_RESUME|CFRAME_UNWIND_FF))
CFRAME_UNWIND_FF  183 lj_frame.h     #define cframe_unwind_ff(cf)	((intptr_t)(cf) & CFRAME_UNWIND_FF)