X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fppc%2Fcall.lisp;h=0dab7f0302484c5b8dcbfa84faec5d31c90efd27;hb=5d3a728a1d9a91e7218fe53f12f96ab63b846810;hp=dd68db8aaf9a372570b9f46d85a8c51df8a88d22;hpb=1f8efb3fd750d7c4127ce938a53bf245f190546d;p=sbcl.git

diff --git a/src/compiler/ppc/call.lisp b/src/compiler/ppc/call.lisp
index dd68db8..0dab7f0 100644
--- a/src/compiler/ppc/call.lisp
+++ b/src/compiler/ppc/call.lisp
@@ -121,6 +121,24 @@
       (when nfp
         (inst addi 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)
   (:ignore copy-more-arg-follows)
@@ -381,6 +399,15 @@ default-value-8
               nvals)
   (:temporary (:scs (non-descriptor-reg)) temp))
 
+
+;;; 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))
 
 
 ;;;; Local call with unknown values convention return:
@@ -750,12 +777,10 @@ default-value-8
                   ;; Conditionally insert a conditional trap:
                   (when step-instrumenting
                     ;; Get the symbol-value of SB!IMPL::*STEPPING*
-                    (loadw stepping
-                           null-tn
-                           (+ symbol-value-slot
-                              (truncate (static-symbol-offset 'sb!impl::*stepping*)
-                                        n-word-bytes))
-                           other-pointer-lowtag)
+                    #!-sb-thread
+                    (load-symbol-value stepping sb!impl::*stepping*)
+                    #!+sb-thread
+                    (loadw stepping thread-base-tn thread-stepping-slot)
                     (inst cmpw stepping null-tn)
                     ;; If it's not null, trap.
                     (inst beq step-done-label)
@@ -1239,12 +1264,10 @@ default-value-8
   (:vop-var vop)
   (:generator 3
     ;; Get the symbol-value of SB!IMPL::*STEPPING*
-    (loadw stepping
-           null-tn
-           (+ symbol-value-slot
-              (truncate (static-symbol-offset 'sb!impl::*stepping*)
-                        n-word-bytes))
-           other-pointer-lowtag)
+    #!-sb-thread
+    (load-symbol-value stepping sb!impl::*stepping*)
+    #!+sb-thread
+    (loadw stepping thread-base-tn thread-stepping-slot)
     (inst cmpw stepping null-tn)
     ;; If it's not null, trap.
     (inst beq DONE)