x_lastcp
cp = x_lastcp();
static char *x_lastcp ARGS((void));
int lim = x_lastcp() - xbp;
shellf("\txlp == 0x%lx\n", (long) x_lastcp());
x_lastcp();
for (cp = x_lastcp(); cp > xcp; )
x_lastcp();
if (xep > x_lastcp())