dtoh64
dumpextent = dtoh64(kdhl.dumpextent);
dumplength = dtoh64(kdhl.dumplength);
dumplen = dtoh64(h->dumplength);
t = dtoh64(h->dumptime);
dumplength = dtoh64(kdhl.dumplength);
extent = dtoh64(kdh->dumpextent);
dumpextent = dtoh64(kdh->dumpextent);