X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86-64%2Fnlx.lisp;h=523ef3199ebbeda15f70680685acc456a84b3690;hb=b83353d9f998e5c0e34604b5593df70c66d2c510;hp=abd9c623d142739ef9fcedfd8a416807d0ba8e38;hpb=4d5a8689d1d303f65c2fa933bb8757063641a8f9;p=sbcl.git

diff --git a/src/compiler/x86-64/nlx.lisp b/src/compiler/x86-64/nlx.lisp
index abd9c62..523ef31 100644
--- a/src/compiler/x86-64/nlx.lisp
+++ b/src/compiler/x86-64/nlx.lisp
@@ -12,19 +12,19 @@
 (in-package "SB!VM")
 
 ;;; Make an environment-live stack TN for saving the SP for NLX entry.
-(!def-vm-support-routine make-nlx-sp-tn (env)
+(defun make-nlx-sp-tn (env)
   (physenv-live-tn
    (make-representation-tn *fixnum-primitive-type* any-reg-sc-number)
    env))
 
 ;;; Make a TN for the argument count passing location for a non-local entry.
-(!def-vm-support-routine make-nlx-entry-arg-start-location ()
+(defun make-nlx-entry-arg-start-location ()
   (make-wired-tn *fixnum-primitive-type* any-reg-sc-number rbx-offset))
 
 (defun catch-block-ea (tn)
   (aver (sc-is tn catch-block))
   (make-ea :qword :base rbp-tn
-           :disp (- (* (+ (tn-offset tn) catch-block-size) n-word-bytes))))
+           :disp (frame-byte-offset (+ -1 (tn-offset tn) catch-block-size))))
 
 
 ;;;; Save and restore dynamic environment.
@@ -148,32 +148,39 @@
           ((= nvals 1)
            (let ((no-values (gen-label)))
              (inst mov (tn-ref-tn values) nil-value)
-             (inst jecxz no-values)
+             (inst jrcxz no-values)
              (loadw (tn-ref-tn values) start -1)
              (emit-label no-values)))
           (t
+           ;; FIXME: this is mostly copied from
+           ;; DEFAULT-UNKNOWN-VALUES.
            (collect ((defaults))
              (do ((i 0 (1+ i))
                   (tn-ref values (tn-ref-across tn-ref)))
                  ((null tn-ref))
                (let ((default-lab (gen-label))
-                     (tn (tn-ref-tn tn-ref)))
-                 (defaults (cons default-lab tn))
-
+                     (tn (tn-ref-tn tn-ref))
+                     (first-stack-arg-p (= i register-arg-count)))
+                 (defaults (cons default-lab (cons tn first-stack-arg-p)))
                  (inst cmp count (fixnumize i))
                  (inst jmp :le default-lab)
+                 (when first-stack-arg-p
+                   (storew rdx-tn rbx-tn -1))
                  (sc-case tn
                    ((descriptor-reg any-reg)
-                    (loadw tn start (- (1+ i))))
+                    (loadw tn start (frame-word-offset (+ sp->fp-offset i))))
                    ((control-stack)
-                    (loadw move-temp start (- (1+ i)))
+                    (loadw move-temp start
+                           (frame-word-offset (+ sp->fp-offset i)))
                     (inst mov tn move-temp)))))
              (let ((defaulting-done (gen-label)))
                (emit-label defaulting-done)
                (assemble (*elsewhere*)
-                 (dolist (def (defaults))
-                   (emit-label (car def))
-                   (inst mov (cdr def) nil-value))
+                 (dolist (default (defaults))
+                   (emit-label (car default))
+                   (when (cddr default)
+                     (inst push rdx-tn))
+                   (inst mov (second default) nil-value))
                  (inst jmp defaulting-done))))))
     (inst mov rsp-tn sp)))
 
@@ -205,14 +212,14 @@
     (inst sub rdi n-word-bytes)
     (move rcx count)                    ; fixnum words == bytes
     (move num rcx)
-    (inst shr rcx word-shift)           ; word count for <rep movs>
+    (inst shr rcx n-fixnum-tag-bits)    ; word count for <rep movs>
     ;; If we got zero, we be done.
-    (inst jecxz DONE)
+    (inst jrcxz DONE)
     ;; Copy them down.
     (inst std)
     (inst rep)
     (inst movs :qword)
-
+    (inst cld)
     DONE
     ;; Reset the CSP at last moved arg.
     (inst lea rsp-tn (make-ea :qword :base rdi :disp n-word-bytes))))
@@ -228,3 +235,56 @@
   (:generator 0
     (emit-label label)
     (note-this-location vop :non-local-entry)))
+
+(define-vop (unwind-to-frame-and-call)
+    (:args (ofp :scs (descriptor-reg))
+           (uwp :scs (descriptor-reg))
+           (function :scs (descriptor-reg) :to :load :target saved-function))
+  (:arg-types system-area-pointer system-area-pointer t)
+  (:temporary (:sc sap-reg) temp)
+  (:temporary (:sc descriptor-reg :offset rbx-offset) saved-function)
+  (:temporary (:sc unsigned-reg :offset rax-offset) block)
+  (:generator 22
+    ;; Store the function into a non-stack location, since we'll be
+    ;; unwinding the stack and destroying register contents before we
+    ;; use it.  It turns out that RBX is preserved as part of the
+    ;; normal multiple-value handling of an unwind, so use that.
+    (move saved-function function)
+
+    ;; Allocate space for magic UWP block.
+    (inst sub rsp-tn (* unwind-block-size n-word-bytes))
+    ;; Set up magic catch / UWP block.
+    (move block rsp-tn)
+    (loadw temp uwp sap-pointer-slot other-pointer-lowtag)
+    (storew temp block unwind-block-current-uwp-slot)
+    (loadw temp ofp sap-pointer-slot other-pointer-lowtag)
+    (storew temp block unwind-block-current-cont-slot)
+
+    (inst lea temp-reg-tn (make-fixup nil :code-object entry-label))
+    (storew temp-reg-tn
+            block
+            catch-block-entry-pc-slot)
+
+    ;; Run any required UWPs.
+    (inst mov temp-reg-tn (make-fixup 'unwind :assembly-routine))
+    (inst jmp temp-reg-tn)
+    ENTRY-LABEL
+
+    ;; Move our saved function to where we want it now.
+    (move block saved-function)
+
+    ;; No parameters
+    (zeroize rcx-tn)
+
+    ;; Clear the stack
+    (inst lea rsp-tn
+          (make-ea :qword :base rbp-tn
+                   :disp (* (- sp->fp-offset 3) n-word-bytes)))
+
+    ;; Push the return-pc so it looks like we just called.
+    (pushw rbp-tn (frame-word-offset return-pc-save-offset))
+
+    ;; Call it
+    (inst jmp (make-ea :qword :base block
+                       :disp (- (* closure-fun-slot n-word-bytes)
+                                fun-pointer-lowtag)))))