Definition local_out_of_reach mu (m : mem) (b : block) (ofs : Z): Prop :=
  locBlocksTgt mu b = true /\
  forall b0 delta, local_of mu b0 = Some (b, delta) ->
                  (~ Mem.perm m b0 (ofs - delta) Max Nonempty \/
                   pubBlocksSrc mu b0 = false).

Lemma restrict_preserves_globals: forall {F V} (ge:Genv.t F V) j X (PG : meminj_preserves_globals ge j) (Glob : forall b, isGlobalBlock ge b = true -> X b = true), meminj_preserves_globals ge (restrict j X).