add dummys

kernel/thread/thread.h

@@ -35,6 +35,11 @@ class Thread {
 	 */
 	alignas(16) char reserved_stack_space[STACK_SIZE];
 
+	struct{
+		void* user;
+		void* isr;
+	} StackPointer;
+
    protected:
 	/*! \brief Context of the thread, used for saving and restoring the register
 	 * values when context switching.
@@ -59,6 +64,8 @@ class Thread {
 	 */
 	static void kickoff(uintptr_t param1, uintptr_t param2, uintptr_t param3);
 
+	static void kickoffUsermode (Thread *object);
+
    public:
 	/*! \brief Unique thread id */
 	const size_t id;