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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef VM_STACK_FRAME_X64_H_
#define VM_STACK_FRAME_X64_H_
namespace dart {
/* X64 Dart Frame Layout
| | <- TOS
Callee frame | ... |
| saved PP |
| code object |
| saved RBP | (RBP of current frame)
| saved PC | (PC of current frame)
+--------------------+
Current frame | ... T| <- RSP of current frame
| first local T|
| caller's PP T|
| code object T| (current frame's code object)
| caller's RBP | <- RBP of current frame
| caller's ret addr | (PC of caller frame)
+--------------------+
Caller frame | last parameter | <- RSP of caller frame
| ... |
T against a slot indicates it needs to be traversed during GC.
*/
static const int kDartFrameFixedSize = 4; // PC marker, RBP, PP, PC.
static const int kSavedPcSlotFromSp = -1;
static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack.
static const int kFirstLocalSlotFromFp = -3;
static const int kSavedCallerPpSlotFromFp = -2;
static const int kPcMarkerSlotFromFp = -1;
static const int kSavedCallerFpSlotFromFp = 0;
static const int kSavedCallerPcSlotFromFp = 1;
static const int kParamEndSlotFromFp = 1; // One slot past last parameter.
static const int kCallerSpSlotFromFp = 2;
static const int kSavedAboveReturnAddress = 3; // Saved above return address.
// Entry and exit frame layout.
#if defined(_WIN64)
static const int kExitLinkSlotFromEntryFp = -32;
#else
static const int kExitLinkSlotFromEntryFp = -10;
#endif // defined(_WIN64)
} // namespace dart
#endif // VM_STACK_FRAME_X64_H_