Add Klog.fatal_error()

src/hulk/acpi.d

@@ -120,7 +120,7 @@ struct Acpi
         const(XSDT) * xsdt = cast(const(XSDT) *)acpi_xsdt_phys;
         if (xsdt.header.signature != XSDT_SIGNATURE)
         {
-            Klog.writef("XSDT signature invalid\n");
+            Klog.fatal_error("XSDT signature invalid");
             return;
         }
         /* Map the entire XSDT. */

src/hulk/klog.d

@@ -6,6 +6,7 @@ module hulk.klog;
 import core.stdc.stdarg;
 import hulk.console;
 static import hulk.writef;
+import hulk.cpu;
 
 struct Klog
 {
@@ -70,4 +71,17 @@ struct Klog
         writef("\n", args);
         va_end(args);
     }
+
+    /**
+     * Print a fatal kernel error and loop forever.
+     */
+    public static void fatal_error(T...)(T args)
+    {
+        writef("FATAL ERROR: ");
+        writefln(args);
+        cli();
+        for (;;)
+        {
+        }
+    }
 }