I figured out how to get top working.

diff --git a/plat/pdpv7/descr b/plat/pdpv7/descr
index 88c77ce..ee69bf1 100644 (file)
--- a/plat/pdpv7/descr
+++ b/plat/pdpv7/descr
@@ -30,20 +30,16 @@ name be
        stdout
        need .e
 end
-
-# There's an ack driver bug where if the .s file needs preprocessing, the path
-# isn't set correctly in stages other than the first; this affects the PDP/11
-# libsys assembler files. Work around this for now by disabling asopt.
-#name asopt
-#      from .s
-#      to .so
-#      program {EM}/lib/ack/{PLATFORM}/top
-#      args
-#      optimizer
-#      stdin
-#      stdout
-#end
-
+name asopt
+       from .s
+       to .so
+       program {EM}/lib/ack/{PLATFORM}/top
+       args
+       optimizer
+       stdin
+       stdout
+       prep cond
+end
 name as
        from .s.so
        to .o