diff -u src/userprog/syscall.c~ src/userprog/syscall.c
--- src/userprog/syscall.c~ 2004-09-26 14:15:17.000000000 -0700
+++ src/userprog/syscall.c 2005-06-08 13:45:28.000000000 -0700
diff -u src/userprog/syscall.c~ src/userprog/syscall.c
--- src/userprog/syscall.c~ 2004-09-26 14:15:17.000000000 -0700
+++ src/userprog/syscall.c 2005-06-08 13:45:28.000000000 -0700