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// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_ARM64_FRAME_CONSTANTS_ARM64_H_
#define V8_ARM64_FRAME_CONSTANTS_ARM64_H_
#include "src/base/macros.h"
#include "src/frame-constants.h"
#include "src/globals.h"
namespace v8 {
namespace internal {
// The layout of an EntryFrame is as follows:
//
// slot Entry frame
// +---------------------+-----------------------
// 0 | bad frame pointer | <-- frame ptr
// | (0xFFF.. FF) |
// |- - - - - - - - - - -|
// 1 | stack frame marker |
// | (ENTRY) |
// |- - - - - - - - - - -|
// 2 | stack frame marker |
// | (0) |
// |- - - - - - - - - - -|
// 3 | C entry FP |
// |- - - - - - - - - - -|
// 4 | JS entry frame |
// | marker |
// |- - - - - - - - - - -|
// 5 | padding | <-- stack ptr
// -----+---------------------+-----------------------
//
class EntryFrameConstants : public AllStatic {
public:
// This is the offset to where JSEntry pushes the current value of
// Isolate::c_entry_fp onto the stack.
static constexpr int kCallerFPOffset = -3 * kSystemPointerSize;
static constexpr int kFixedFrameSize = 6 * kSystemPointerSize;
};
class ExitFrameConstants : public TypedFrameConstants {
public:
static constexpr int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
static constexpr int kCodeOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(1);
static constexpr int kPaddingOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(2);
DEFINE_TYPED_FRAME_SIZES(3);
static constexpr int kLastExitFrameField = kPaddingOffset;
static constexpr int kConstantPoolOffset = 0; // Not used
};
class WasmCompileLazyFrameConstants : public TypedFrameConstants {
public:
static constexpr int kNumberOfSavedGpParamRegs = 8;
static constexpr int kNumberOfSavedFpParamRegs = 8;
// FP-relative.
static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(1);
static constexpr int kFixedFrameSizeFromFp =
// Header is padded to 16 byte (see {MacroAssembler::EnterFrame}).
RoundUp<16>(TypedFrameConstants::kFixedFrameSizeFromFp) +
kNumberOfSavedGpParamRegs * kSystemPointerSize +
kNumberOfSavedFpParamRegs * kDoubleSize;
};
class JavaScriptFrameConstants : public AllStatic {
public:
// FP-relative.
static constexpr int kLocal0Offset =
StandardFrameConstants::kExpressionsOffset;
// There are two words on the stack (saved fp and saved lr) between fp and
// the arguments.
static constexpr int kLastParameterOffset = 2 * kSystemPointerSize;
static constexpr int kFunctionOffset =
StandardFrameConstants::kFunctionOffset;
};
} // namespace internal
} // namespace v8
#endif // V8_ARM64_FRAME_CONSTANTS_ARM64_H_
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