feature: print_stack working (dont use opti flags, else the stack is broken)

src/debug/print_stack.c

@@ -0,0 +1,13 @@
+#include "debug.h"
+#include "kprintf.h"
+
+void print_stack(void)
+{
+	struct stackframe *stack =
+	    (struct stackframe *)__builtin_frame_address(0);
+
+	while (stack) {
+		kprintf(0, "stack->ebp: %d\n", stack->ebp);
+		stack = stack->ebp;
+	}
+}