diff options
| author |  xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-05-23 15:26:33 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-05-23 15:26:33 +0000 |
| commit | 3a050b22f37f3c79a10a8ebae3d292fa77e91b76 (patch) | |
| tree | 16a0d9366f6805cfc9726c0b80dd8da84cb63a3d /arm | |
| parent | 7999c9ee1f09f7d555e3efc39f030564f76a3354 (diff) | |
More faithful semantics for volatile reads and writes.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1346 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'arm')
| -rw-r--r-- | arm/Asm.v | 2 | ||||
| -rw-r--r-- | arm/Asmgenproof.v | 13 |
2 files changed, 12 insertions, 3 deletions
@@ -616,7 +616,7 @@ Inductive step: state -> trace -> state -> Prop := forall b ef args res rs m t rs' m', rs PC = Vptr b Int.zero -> Genv.find_funct_ptr ge b = Some (External ef) -> - external_call ef (Genv.find_symbol ge) args m t res m' -> + external_call ef ge args m t res m' -> extcall_arguments rs m ef.(ef_sig) args -> rs' = (rs#(loc_external_result ef.(ef_sig)) <- res #PC <- (rs IR14)) -> diff --git a/arm/Asmgenproof.v b/arm/Asmgenproof.v index 0a1180c..9975972 100644 --- a/arm/Asmgenproof.v +++ b/arm/Asmgenproof.v @@ -81,6 +81,14 @@ Proof. congruence. intro; omega. Qed. +Lemma varinfo_preserved: + forall b, Genv.find_var_info tge b = Genv.find_var_info ge b. +Proof. + intros. unfold ge, tge. + apply Genv.find_var_info_transf_partial with transf_fundef. + exact TRANSF. +Qed. + (** * Properties of control flow *) Lemma find_instr_in: @@ -1135,7 +1143,7 @@ Lemma exec_function_external_prop: (m : mem) (t0 : trace) (ms' : RegEq.t -> val) (ef : external_function) (args : list val) (res : val) (m': mem), Genv.find_funct_ptr ge fb = Some (External ef) -> - external_call ef (Genv.find_symbol ge) args m t0 res m' -> + external_call ef ge args m t0 res m' -> Machconcr.extcall_arguments ms m (parent_sp s) (ef_sig ef) args -> ms' = Regmap.set (Conventions.loc_result (ef_sig ef)) res ms -> exec_instr_prop (Machconcr.Callstate s fb ms m) @@ -1147,7 +1155,8 @@ Proof. left; exists (State (rs#(loc_external_result (ef_sig ef)) <- res #PC <- (rs IR14)) m'); split. apply plus_one. eapply exec_step_external; eauto. - eapply external_call_symbols_preserved; eauto. exact symbols_preserved. + eapply external_call_symbols_preserved; eauto. + exact symbols_preserved. exact varinfo_preserved. eapply extcall_arguments_match; eauto. econstructor; eauto. unfold loc_external_result. auto with ppcgen. |