Implement callback function for fallback type library

Author: river-li

binaryninjaapi.h

@@ -14556,6 +14556,7 @@ namespace BinaryNinja {
 			char** sourceFileValues,
 			size_t sourceFilesLen
 		);
+		static bool GetFallbackEnabledCallback(void* ctxt);
 
 	  public:
 		Platform(BNPlatform* platform);
@@ -14728,6 +14729,13 @@ namespace BinaryNinja {
 			std::vector<std::pair<std::string, std::string>>& sourceFiles
 		);
 
+		/*! Provide an option for platforms to decide whether to use
+		 * the fallback type library.
+		 *
+		 * Allows the Platform to override it to false.
+		 */
+		virtual bool GetFallbackEnabled();
+
 		Ref<Platform> GetRelatedPlatform(Architecture* arch);
 		void AddRelatedPlatform(Architecture* arch, Platform* platform);
 		Ref<Platform> GetAssociatedPlatformByAddress(uint64_t& addr);

binaryninjacore.h

@@ -1906,6 +1906,8 @@ extern "C"
 			char** sourceFileValues,
 			size_t sourceFilesLen
 		);
+
+		bool (*getFallbackEnabled)(void* ctxt);
 	} BNCustomPlatform;
 
 	typedef struct BNBasicBlockEdge

platform.cpp

@@ -44,6 +44,7 @@ Platform::Platform(Architecture* arch, const string& name)
 	plat.getGlobalRegisterType = GetGlobalRegisterTypeCallback;
 	plat.adjustTypeParserInput = AdjustTypeParserInputCallback;
 	plat.freeTypeParserInput = FreeTypeParserInputCallback;
+	plat.getFallbackEnabled = GetFallbackEnabledCallback;
 	m_object = BNCreateCustomPlatform(arch->GetObject(), name.c_str(), &plat);
 	AddRefForRegistration();
 }
@@ -60,6 +61,7 @@ Platform::Platform(Architecture* arch, const string& name, const string& typeFil
 	plat.getGlobalRegisterType = GetGlobalRegisterTypeCallback;
 	plat.adjustTypeParserInput = AdjustTypeParserInputCallback;
 	plat.freeTypeParserInput = FreeTypeParserInputCallback;
+	plat.getFallbackEnabled = GetFallbackEnabledCallback;
 	const char** includeDirList = new const char*[includeDirs.size()];
 	for (size_t i = 0; i < includeDirs.size(); i++)
 		includeDirList[i] = includeDirs[i].c_str();
@@ -191,6 +193,12 @@ BNType* Platform::GetGlobalRegisterTypeCallback(void* ctxt, uint32_t reg)
 	return BNNewTypeReference(result->GetObject());
 }
 
+bool Platform::GetFallbackEnabledCallback(void* ctxt)
+{
+	CallbackRef<Platform> plat(ctxt);
+	return plat->GetFallbackEnabled();
+}
+
 
 Ref<Architecture> Platform::GetArchitecture() const
 {
@@ -410,6 +418,12 @@ Ref<Type> Platform::GetGlobalRegisterType(uint32_t reg)
 }
 
 
+bool Platform::GetFallbackEnabled()
+{
+	return true;
+}
+
+
 std::vector<uint32_t> CorePlatform::GetGlobalRegisters()
 {
 	size_t count;