First draft of the sh4 port

src/sh4/frames-sh4.cc

Index: src/sh4/frames-sh4.cc
diff --git a/src/ia32/frames-ia32.cc b/src/sh4/frames-sh4.cc
similarity index 93%
copy from src/ia32/frames-ia32.cc
copy to src/sh4/frames-sh4.cc
index dd44f0ee5ff12dc7de0df1a33a544e6c19723934..bb7d672aed2b507fd841f461ef4533162df7ae13 100644
--- a/src/ia32/frames-ia32.cc
+++ b/src/sh4/frames-sh4.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011-2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -27,7 +27,7 @@
 
 #include "v8.h"
 
-#if defined(V8_TARGET_ARCH_IA32)
+#if defined(V8_TARGET_ARCH_SH4)
 
 #include "frames-inl.h"
 
@@ -42,4 +42,4 @@ Address ExitFrame::ComputeStackPointer(Address fp) {
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_TARGET_ARCH_SH4