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