X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Fshow.lisp;h=5fb38b9b5976588754c66979a12b6d3f29f652a7;hb=b28aadc5bd34a0d9fa0ff15c52b2b4164d955831;hp=4d291f10c39ed28f498d48acc5e01de102926426;hpb=0d871fd7a98fc4af92a8b942a1154761466ad8c9;p=sbcl.git

diff --git a/src/compiler/x86/show.lisp b/src/compiler/x86/show.lisp
index 4d291f1..5fb38b9 100644
--- a/src/compiler/x86/show.lisp
+++ b/src/compiler/x86/show.lisp
@@ -22,11 +22,20 @@
                :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)
+    ;; 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))
-    (inst add esp-tn n-word-bytes)
+    #!-darwin (inst add esp-tn n-word-bytes)
+    #!+darwin (inst mov esp-tn prev-stack-pointer)
     (move result eax)))