(when nfp
(inst addu val nfp (bytes-needed-for-non-descriptor-stack-frame))))))
+;;; Accessing a slot from an earlier stack frame is definite hackery.
+(define-vop (ancestor-frame-ref)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (variable-home-tn :load-if nil))
+ (:results (value :scs (descriptor-reg any-reg)))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (loadw value frame-pointer (tn-offset variable-home-tn))))
+(define-vop (ancestor-frame-set)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (value :scs (descriptor-reg any-reg)))
+ (:results (variable-home-tn :load-if nil))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (storew value frame-pointer (tn-offset variable-home-tn))))
(define-vop (xep-allocate-frame)
(:info start-lab copy-more-arg-follows)
nvals)
(:temporary (:scs (non-descriptor-reg)) temp))
+\f
+;;; This hook in the codegen pass lets us insert code before fall-thru entry
+;;; points, local-call entry points, and tail-call entry points. The default
+;;; does nothing.
+(defun emit-block-header (start-label trampoline-label fall-thru-p alignp)
+ (declare (ignore fall-thru-p alignp))
+ (when trampoline-label
+ (emit-label trampoline-label))
+ (emit-label start-label))
\f
;;;; Local call with unknown values convention return:
(insert-step-instrumenting (callable-tn)
;; Conditionally insert a conditional trap:
(when step-instrumenting
- ;; Get the symbol-value of SB!IMPL::*STEPPING*
- (inst lw stepping null-tn
- (- (+ symbol-value-slot
- (truncate (static-symbol-offset 'sb!impl::*stepping*)
- n-word-bytes))
- other-pointer-lowtag))
+ (load-symbol-value stepping sb!impl::*stepping*)
;; If it's not NIL, trap.
(inst beq stepping null-tn step-done-label)
(inst nop)
(:policy :fast-safe)
(:vop-var vop)
(:generator 3
- ;; Get the symbol-value of SB!IMPL::*STEPPING*
- (inst lw stepping null-tn
- (- (+ symbol-value-slot
- (truncate (static-symbol-offset 'sb!impl::*stepping*)
- n-word-bytes))
- other-pointer-lowtag))
+ (load-symbol-value stepping sb!impl::*stepping*)
;; If it's not NIL, trap.
(inst beq stepping null-tn DONE)
(inst nop)