Incidentally, if you have trouble handling the third case above, you
can eliminate it temporarily by linking the test programs with a
-special ``linker script.'' Read @file{tests/userprog/Makefile} for
+special ``linker script.'' Read @file{Makefile.userprog} for
details. We will not test your submission with this special linker
script, so the code you turn in must properly handle all cases.