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// Copyright 2012 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_ARM_FRAME_CONSTANTS_ARM_H_
#define V8_ARM_FRAME_CONSTANTS_ARM_H_
#include "src/base/macros.h"
#include "src/frame-constants.h"
namespace v8 {
namespace internal {
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 =
-(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize);
// Stack offsets for arguments passed to JSEntry.
static constexpr int kArgcOffset = +0 * kSystemPointerSize;
static constexpr int kArgvOffset = +1 * 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);
DEFINE_TYPED_FRAME_SIZES(2);
// The caller fields are below the frame pointer on the stack.
static constexpr int kCallerFPOffset = 0 * kPointerSize;
// The calling JS function is below FP.
static constexpr int kCallerPCOffset = 1 * kPointerSize;
// FP-relative displacement of the caller's SP. It points just
// below the saved PC.
static constexpr int kCallerSPDisplacement = 2 * kPointerSize;
};
class WasmCompileLazyFrameConstants : public TypedFrameConstants {
public:
static constexpr int kNumberOfSavedGpParamRegs = 4;
static constexpr int kNumberOfSavedFpParamRegs = 8;
// FP-relative.
static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
static constexpr int kFixedFrameSizeFromFp =
TypedFrameConstants::kFixedFrameSizeFromFp +
kNumberOfSavedGpParamRegs * kPointerSize +
kNumberOfSavedFpParamRegs * kDoubleSize;
};
class JavaScriptFrameConstants : public AllStatic {
public:
// FP-relative.
static constexpr int kLocal0Offset =
StandardFrameConstants::kExpressionsOffset;
static constexpr int kLastParameterOffset = +2 * kPointerSize;
static constexpr int kFunctionOffset =
StandardFrameConstants::kFunctionOffset;
// Caller SP-relative.
static constexpr int kParam0Offset = -2 * kPointerSize;
static constexpr int kReceiverOffset = -1 * kPointerSize;
};
} // namespace internal
} // namespace v8
#endif // V8_ARM_FRAME_CONSTANTS_ARM_H_
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