LAB 4 IS DONE.

lab/user/evilhello.c

@@ -0,0 +1,12 @@
+// evil hello world -- kernel pointer passed to kernel
+// kernel should destroy user environment in response
+
+#include <inc/lib.h>
+
+void
+umain(int argc, char **argv)
+{
+	// try to print the kernel entry point as a string!  mua ha ha!
+	sys_cputs((char*)0xf010000c, 100);
+}
+