extern void enlargeStablePtrTable ( void );
extern StgWord lookupStableName ( StgPtr p );
-extern void markStablePtrTable ( evac_fn evac );
-extern void threadStablePtrTable ( evac_fn evac );
+extern void markStablePtrTable ( evac_fn evac, void *user );
+extern void threadStablePtrTable ( evac_fn evac, void *user );
extern void gcStablePtrTable ( void );
extern void updateStablePtrTable ( rtsBool full );