(** * Matching and memory injections. *)
Definition inj_of_bc (bc: block_classification) : meminj :=
fun b => match bc b with BCinvalid => None | _ => Some(b, 0) end.

Lemma mmatch_inj_top:
forall bc m m', Mem.inject (inj_of_bc bc) m m' -> mmatch bc m mtop.