Change ARM exit frame layout and alingment handling...

src/arm/frames-arm.h

 // Copyright 2006-2008 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 89 matching lines @@
 
 
 class EntryFrameConstants : public AllStatic {
  public:
   static const int kCallerFPOffset      = -3 * kPointerSize;
 };
 
 
 class ExitFrameConstants : public AllStatic {
  public:
-  static const int kCodeOffset = -1 * kPointerSize;
+  static const int kCodeOffset = -2 * kPointerSize;
   static const int kSPOffset = -1 * kPointerSize;
 
-  // TODO(regis): Use a patched sp value on the stack instead.
-  // A marker of 0 indicates that double registers are saved.
-  static const int kMarkerOffset = -2 * kPointerSize;
-
   // The caller fields are below the frame pointer on the stack.
-  static const int kCallerFPOffset = +0 * kPointerSize;
-  // The calling JS function is between FP and PC.
-  static const int kCallerPCOffset = +2 * kPointerSize;
+  static const int kCallerFPOffset = 0 * kPointerSize;
+  // The calling JS function is below FP.
+  static const int kCallerPCOffset = 1 * kPointerSize;
 
   // FP-relative displacement of the caller's SP.  It points just
   // below the saved PC.
-  static const int kCallerSPDisplacement = +3 * kPointerSize;
+  static const int kCallerSPDisplacement = 2 * kPointerSize;
 };
 
 
 class StandardFrameConstants : public AllStatic {
  public:
   static const int kExpressionsOffset = -3 * kPointerSize;
   static const int kMarkerOffset      = -2 * kPointerSize;
   static const int kContextOffset     = -1 * kPointerSize;
   static const int kCallerFPOffset    =  0 * kPointerSize;
-  static const int kCallerPCOffset    = +1 * kPointerSize;
-  static const int kCallerSPOffset    = +2 * kPointerSize;
+  static const int kCallerPCOffset    =  1 * kPointerSize;
+  static const int kCallerSPOffset    =  2 * kPointerSize;
 };
 
 
 class JavaScriptFrameConstants : public AllStatic {
  public:
   // FP-relative.
   static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
   static const int kSavedRegistersOffset = +2 * kPointerSize;
   static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
 
@@ skipping 17 matching lines @@
 
 inline Object* JavaScriptFrame::function_slot_object() const {
   const int offset = JavaScriptFrameConstants::kFunctionOffset;
   return Memory::Object_at(fp() + offset);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_FRAMES_ARM_H_