U_REG
xaddr -= REGADDR-U_REG;
xaddr -= REGADDR-U_REG;
if ((int)xaddr >= U_REG && xaddr < U_REG+sizeof (gregset_t)) {
int rx = (xaddr-U_REG)/sizeof (greg_t);
xaddr -= REGADDR-U_REG;
xaddr -= REGADDR-U_REG;
if ((int)xaddr >= U_REG && xaddr < U_REG+sizeof (gregset_t)) {
int rx = (xaddr-U_REG)/sizeof (greg_t);