KTR_SYSRET
ktrinitheader(&kth, p, KTR_SYSRET);
#define KTRFAC_SYSRET (1<<KTR_SYSRET)
if (KTRPOINT(p, KTR_SYSRET))
if (KTRPOINT(p, KTR_SYSRET))
case KTR_SYSRET:
case KTR_SYSRET: