memlist_cat_span
memlist_cat_span(t_mp->sbm_dyn_segs,
memlist_cat_span(t_mp->sbm_dyn_segs,
b_ml = memlist_cat_span(b_ml, ml->ml_address, ml->ml_size);
x_ml = memlist_cat_span(x_ml, del_base, del_end - del_base);
x_ml = memlist_cat_span(x_ml, nr_base, nr_end - nr_base);