SDT_ADDR2NDX
sdt_probetab[SDT_ADDR2NDX(sdpd->sdpd_offset)];
sdt_probetab[SDT_ADDR2NDX(sdpd->sdpd_offset)] = sdp;
ndx = SDT_ADDR2NDX(sdp->sdp_patchpoint);
sdt_probe_t *sdt = sdt_probetab[SDT_ADDR2NDX(addr)];