X64: Implement CEntryStub and JSEntryTrampoline.

src/x64/frames-x64.h

 // Copyright 2009 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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_X64_FRAMES_X64_H_
 #define V8_X64_FRAMES_X64_H_
 
 namespace v8 {
 namespace internal {
 
 // TODO(x64): This is a stub, mostly just a copy of the ia32 bit version.
-// This will all need to change to be correct for x64.
+// This might all need to change to be correct for x64.
 
 static const int kNumRegs = 8;
-static const RegList kJSCallerSaved = 0;
+static const RegList kJSCallerSaved =
+    1 << 0 |  // rax
+    1 << 1 |  // rcx
+    1 << 2 |  // rdx
+    1 << 3 |  // rbx - used as a caller-saved register in JavaScript code
+    1 << 7;   // rdi - callee function
+
 static const int kNumJSCallerSaved = 5;
+
 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
 
 class StackHandlerConstants : public AllStatic {
  public:
   static const int kNextOffset  = 0 * kPointerSize;
-  static const int kPPOffset    = 1 * kPointerSize;
-  static const int kFPOffset    = 2 * kPointerSize;
+  static const int kFPOffset    = 1 * kPointerSize;
 
-  static const int kCodeOffset  = 3 * kPointerSize;
+  static const int kCodeOffset  = 2 * kPointerSize;
 
-  static const int kStateOffset = 4 * kPointerSize;
-  static const int kPCOffset    = 5 * kPointerSize;
+  static const int kStateOffset = 3 * kPointerSize;
+  static const int kPCOffset    = 4 * kPointerSize;
 
   static const int kAddressDisplacement = -1 * kPointerSize;
-  static const int kSize = 6 * kPointerSize;
+  static const int kSize = 5 * kPointerSize;
 };
 
 
 class EntryFrameConstants : public AllStatic {
  public:
-  static const int kCallerFPOffset      = -1 * kPointerSize;
+  static const int kCallerFPOffset      = 0 * kPointerSize;
 
-  static const int kFunctionArgOffset   = -1 * kPointerSize;
-  static const int kReceiverArgOffset   = -1 * kPointerSize;
-  static const int kArgcOffset          = -1 * kPointerSize;
-  static const int kArgvOffset          = -1 * kPointerSize;
+  static const int kFunctionArgOffset   = 1 * kPointerSize;
+  static const int kReceiverArgOffset   = 2 * kPointerSize;
+  static const int kArgcOffset          = 3 * kPointerSize;
+  static const int kArgvOffset          = 4 * kPointerSize;
 };
 
 
 class ExitFrameConstants : public AllStatic {
  public:
-  static const int kDebugMarkOffset = -1 * kPointerSize;
+  static const int kDebugMarkOffset = -2 * kPointerSize;
   static const int kSPOffset        = -1 * kPointerSize;
 
-  static const int kPPDisplacement = -1 * kPointerSize;
+  // TODO(X64): Remove usage of PP in exit frames?
+  // Still used though StackFrame::pp()
+  static const int kPPDisplacement  = +2 * kPointerSize;
 
-  static const int kCallerFPOffset = -1 * kPointerSize;
-  static const int kCallerPCOffset = -1 * kPointerSize;
+  static const int kCallerFPOffset  = +0 * kPointerSize;
+  static const int kCallerPCOffset  = +1 * kPointerSize;
 };
 
 
 class StandardFrameConstants : public AllStatic {
  public:
   static const int kExpressionsOffset = -1 * kPointerSize;
   static const int kMarkerOffset      = -1 * kPointerSize;
   static const int kContextOffset     = -1 * kPointerSize;
   static const int kCallerFPOffset    = -1 * kPointerSize;
   static const int kCallerPCOffset    = -1 * kPointerSize;
@@ skipping 25 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_X64_FRAMES_X64_H_