#ifdef STM
#define trace(op, ...) ;
#else
-#define trace(op, ...) ;
-//printf("pc: %d, sp: %d, op: " op "\n", pc, sp, ##__VA_ARGS__);
+#define trace(op, ...) printf("pc: %d, sp: %d, op: " op "\n", pc, sp, ##__VA_ARGS__);
#endif
void run_task(struct task *t)