Inductive valid_genv {F V:Type} (ge:Genv.t F V) (m:mem) : Type :=
mk_valid_genv :
(forall b, isGlobalBlock ge b=true -> val_valid (Vptr b Ptrofs.zero) m) ->
(forall b f, Genv.find_funct_ptr ge b = Some f -> val_valid (Vptr b Ptrofs.zero) m) ->
valid_genv ge m.

Lemma mem_wd_storebytes: forall m b ofs bytes m' (WDm: mem_wd m)
(ST: Mem.storebytes m b ofs bytes = Some m')
(BytesValid: forall v, In v bytes ->
memval_inject (Mem.flat_inj (Mem.nextblock m)) v v),
mem_wd m'.