Index: sc-bad-sp.c
===================================================================
RCS file: /home/staff/gback/cvs/pintos-fall2006/src/tests/userprog/sc-bad-sp.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 sc-bad-sp.c
--- sc-bad-sp.c	22 Aug 2006 23:12:57 -0000	1.1.1.1
+++ sc-bad-sp.c	8 Nov 2006 01:15:17 -0000
@@ -1,6 +1,15 @@
 /* Invokes a system call with the stack pointer (%esp) set to a
    bad address.  The process must be terminated with -1 exit
-   code. */
+   code. 
+
+   For Project 3:
+   Since the bad address lies approximately 64MB below the code 
+   segment, there is no ambiguity that this attempt must
+   be rejected even after stack growth is implemented.
+   Moreover, a good stack growth heuristics should probably 
+   not grow the stack for the purpose of reading the system call 
+   number and arguments.
+ */
 
 #include "tests/lib.h"
 #include "tests/main.h"
@@ -8,6 +17,6 @@
 void
 test_main (void) 
 {
-  asm volatile ("movl $0x20101234, %esp; int $0x30");
+  asm volatile ("movl . - (64*1024*1024), %esp; int $0x30");
   fail ("should have called exit(-1)");
 }