nursery_bdescr_blocks = cmmOffset stgCurrentNursery oFFSET_bdescr_blocks
tso_SP, tso_STACK, tso_CCCS :: ByteOff
-tso_SP = tsoFieldB oFFSET_StgTSO_sp
-tso_STACK = tsoFieldB oFFSET_StgTSO_stack
+tso_SP = tsoFieldB undefined --oFFSET_StgTSO_sp
+tso_STACK = tsoFieldB undefined --oFFSET_StgTSO_stack
tso_CCCS = tsoProfFieldB oFFSET_StgTSO_CCCS
-- The TSO struct has a variable header, and an optional StgTSOProfInfo in