Intial Thumb2 Sandbox (naclrev 6680)

src/trusted/validator_arm/ncvalidate.cc

Index: src/trusted/validator_arm/ncvalidate.cc
diff --git a/src/trusted/validator_arm/ncvalidate.cc b/src/trusted/validator_arm/ncvalidate.cc
index 6601d7a77fe68142c79273c241cf5779b5118bf6..4697d90b1b12dfa5111fbe17ae73f3e35c5e5177 100644
--- a/src/trusted/validator_arm/ncvalidate.cc
+++ b/src/trusted/validator_arm/ncvalidate.cc
@@ -46,14 +46,19 @@ class EarlyExitProblemSink : public nacl_arm_val::ProblemSink {
 
 EXTERN_C_BEGIN
 
-int NCValidateSegment(uint8_t *mbase, uint32_t vbase, size_t size) {
+int NCValidateSegment(uint8_t *mbase, uint32_t vbase, size_t size,
+                      bool thumb) {
+  nacl_arm_dec::RegisterList roRegs = Register(9);
+  if (thumb) {
+    roRegs = nacl_arm_dec::kRegisterListNothing;
+  }
   SfiValidator validator(
       16,  // bytes per bundle
       1U * 1024 * 1024 * 1024,  // bytes of code space
       1U * 1024 * 1024 * 1024,  // bytes of data space
-      Register(9),  // read only register(s)
-      kRegisterStack);  // data addressing register(s)
-
+      roRegs,  // read only register(s)
+      kRegisterStack,  // data addressing register(s)
+      thumb);
   EarlyExitProblemSink sink;
 
   vector<CodeSegment> segments;
@@ -74,10 +79,11 @@ NaClValidationStatus NACL_SUBARCH_NAME(ApplyValidator, arm, 32) (
     Bool local_cpu) {
   NaClValidationStatus status = NaClValidationFailedNotImplemented;
   UNREFERENCED_PARAMETER(local_cpu);
-  UNREFERENCED_PARAMETER(sb_kind);
+
   if (bundle_size == 16) {
     if (kind == NaClApplyCodeValidation) {
-        status = ((0 == NCValidateSegment(data, guest_addr, size))
+        status = ((0 == NCValidateSegment(data, guest_addr, size,
+                                          sb_kind == NACL_SB_ARM_THUMB2))
                   ? NaClValidationSucceeded : NaClValidationFailed);
     }
   }