X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Fshow.lisp;h=5fb38b9b5976588754c66979a12b6d3f29f652a7;hb=cd8fe50554652680dde36396d7862fc6cc83839c;hp=b52d6a500d329846e4b70d86f9b05c97de00f175;hpb=50305b602c3953440af716137a56f50cd204375d;p=sbcl.git

diff --git a/src/compiler/x86/show.lisp b/src/compiler/x86/show.lisp
index b52d6a5..5fb38b9 100644
--- a/src/compiler/x86/show.lisp
+++ b/src/compiler/x86/show.lisp
@@ -17,16 +17,25 @@
 (define-vop (print)
   (:args (object :scs (descriptor-reg any-reg)))
   (:temporary (:sc unsigned-reg
-	       :offset eax-offset
-	       :target result
-	       :from :eval
-	       :to (:result 0))
-	      eax)
+               :offset eax-offset
+               :target result
+               :from :eval
+               :to (:result 0))
+              eax)
+  #!+darwin (:temporary (:sc unsigned-reg
+                            :offset esi-offset)
+                       prev-stack-pointer)
   (:results (result :scs (descriptor-reg)))
   (:save-p t)
   (:generator 100
-    (inst push object)
-    (inst lea eax (make-fixup (extern-alien-name "debug_print") :foreign))
-    (inst call (make-fixup (extern-alien-name "call_into_c") :foreign))
-    (inst add esp-tn n-word-bytes)
+    ;; the stack should be 16-byte aligned on Darwin
+    #!-darwin (inst push object)
+    #!+darwin (progn (inst mov prev-stack-pointer esp-tn)
+                     (inst sub esp-tn n-word-bytes)
+                     (inst and esp-tn -16)
+                     (storew object esp-tn))
+    (inst lea eax (make-fixup "debug_print" :foreign))
+    (inst call (make-fixup "call_into_c" :foreign))
+    #!-darwin (inst add esp-tn n-word-bytes)
+    #!+darwin (inst mov esp-tn prev-stack-pointer)
     (move result eax)))