scheduler: sched_die() and new thread state

src/include/kernel/sched.h

@@ -17,6 +17,7 @@
 #define THREAD_STATE_RUNNING 1
 #define THREAD_STATE_BLOCKED 2
 #define THREAD_STATE_BLOCKED_INTR 3
+#define THREAD_STATE_DEAD 4
 
 #define PROC_STATE_NORMAL 0
 #define PROC_STATE_ZOMBIE 1

src/sys/sched/scheduler.c

@@ -373,6 +373,13 @@ void sched_dequeue(){
 
 }
 
+__attribute__((noreturn)) int sched_die(){
+	
+	arch_getcls()->thread->state = THREAD_STATE_DEAD;
+
+	sched_dequeue();
+}
+
 void sched_block(bool interruptible){
 	
 	thread_t* thread = arch_getcls()->thread;