Nucleus

diff --git a/kernel/panic.c b/kernel/panic.c
new file mode 100644
index 0000000..415b2b1
--- /dev/null
+++ b/kernel/panic.c
@@ -0,0 +1,29 @@
+/*
+ * This file implements the full kernel panic routine.  This routine does not
+ * return, and is essentially a shutdown routine.  It will print a message to
+ * the debug port and halt the processor.  In an ideal build, this function
+ * won't need to be linked in.
+ */
+
+#include <stdint.h>
+#include <io.h>
+
+/* Kernel panic */
+_Noreturn void
+panic(char *fmt, ...)
+{
+	outb(0xE9, '\033');
+	outb(0xE9, '[');
+	outb(0xE9, '3');
+	outb(0xE9, '1');
+	outb(0xE9, 'm');
+
+	char *p = fmt;
+	while (*p)
+		outb(0xE9, *p++);
+	outb(0xE9, '\n');
+
+	asm volatile("cli");
+	while (1)
+		asm volatile("hlt");
+}