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 valid_genv_alloc_globals:
forall F V (ge: Genv.t F V) init_list m0 m
(GA: Genv.alloc_globals ge m0 init_list = Some m),
valid_genv ge m0 -> valid_genv ge m.