Initial version

code/test/halt.c

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+/* halt.c
+ *	Simple program to test whether running a user program works.
+ *	
+ *	Just do a "syscall" that shuts down the OS.
+ *
+ * 	NOTE: for some reason, user programs with global data structures 
+ *	sometimes haven't worked in the Nachos environment.  So be careful
+ *	out there!  One option is to allocate data structures as 
+ * 	automatics within a procedure, but if you do this, you have to
+ *	be careful to allocate a big enough stack to hold the automatics!
+ */
+
+#include "syscall.h"
+
+int
+main ()
+{
+    Halt ();
+
+    /* not reached */
+    return 0;
+}