si_code          1484 kern/kern_sig.c 	si->si_code = type;
si_code            42 sys/siginfo.h  #define SI_FROMUSER(sip)	((sip)->si_code <= 0)
si_code            43 sys/siginfo.h  #define SI_FROMKERNEL(sip)	((sip)->si_code > 0)
si_code           134 sys/siginfo.h  	int	si_code;			/* code from above */