sb!vm::*alien-stack*
#!+sb-thread sb!thread::*foreground-thread-stack*
sb!vm::*control-stack-start*
+ sb!vm::*control-stack-end*
sb!vm::*binding-stack-start*
;; FIXME: The pseudo-atomic variable stuff should be
;; conditional on :SB-PSEUDO-ATOMIC-SYMBOLS, which