| // 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. |
| |
| #include "arm64/constants-arm64.h" |
| #include "arm64/assembler-arm64.h" |
| |
| #ifndef V8_ARM64_FRAMES_ARM64_H_ |
| #define V8_ARM64_FRAMES_ARM64_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| const int kNumRegs = kNumberOfRegisters; |
| // Registers x0-x17 are caller-saved. |
| const int kNumJSCallerSaved = 18; |
| const RegList kJSCallerSaved = 0x3ffff; |
| typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; |
| |
| // Number of registers for which space is reserved in safepoints. Must be a |
| // multiple of eight. |
| // TODO(all): Refine this number. |
| const int kNumSafepointRegisters = 32; |
| |
| // Define the list of registers actually saved at safepoints. |
| // Note that the number of saved registers may be smaller than the reserved |
| // space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. |
| #define kSafepointSavedRegisters CPURegList::GetSafepointSavedRegisters().list() |
| #define kNumSafepointSavedRegisters \ |
| CPURegList::GetSafepointSavedRegisters().Count(); |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| static const int kCallerFPOffset = |
| -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize); |
| }; |
| |
| |
| class ExitFrameConstants : public AllStatic { |
| public: |
| static const int kFrameSize = 2 * kPointerSize; |
| |
| static const int kCallerSPDisplacement = 2 * kPointerSize; |
| static const int kCallerPCOffset = 1 * kPointerSize; |
| static const int kCallerFPOffset = 0 * kPointerSize; // <- fp |
| static const int kSPOffset = -1 * kPointerSize; |
| static const int kCodeOffset = -2 * kPointerSize; |
| static const int kLastExitFrameField = kCodeOffset; |
| |
| static const int kConstantPoolOffset = 0; // Not used |
| }; |
| |
| |
| class JavaScriptFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
| |
| // There are two words on the stack (saved fp and saved lr) between fp and |
| // the arguments. |
| static const int kLastParameterOffset = 2 * kPointerSize; |
| |
| static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
| }; |
| |
| |
| class ArgumentsAdaptorFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; |
| |
| static const int kFrameSize = |
| StandardFrameConstants::kFixedFrameSize + kPointerSize; |
| }; |
| |
| |
| class ConstructFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| static const int kLengthOffset = -4 * kPointerSize; |
| static const int kConstructorOffset = -5 * kPointerSize; |
| static const int kImplicitReceiverOffset = -6 * kPointerSize; |
| |
| static const int kFrameSize = |
| StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize; |
| }; |
| |
| |
| class InternalFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| }; |
| |
| |
| inline Object* JavaScriptFrame::function_slot_object() const { |
| const int offset = JavaScriptFrameConstants::kFunctionOffset; |
| return Memory::Object_at(fp() + offset); |
| } |
| |
| |
| inline void StackHandler::SetFp(Address slot, Address fp) { |
| Memory::Address_at(slot) = fp; |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_ARM64_FRAMES_ARM64_H_ |