/* Copy the context stack up to the context just below the target. */
si->si_cxix = (cxix < 0) ? -1 : (cxix - 1);
if (si->si_cxmax < cxix) {
/* Copy the context stack up to the context just below the target. */
si->si_cxix = (cxix < 0) ? -1 : (cxix - 1);
if (si->si_cxmax < cxix) {