| // 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_X64_FRAMES_X64_H_ |
| #define V8_X64_FRAMES_X64_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| const int kNumRegs = 16; |
| const RegList kJSCallerSaved = |
| 1 << 0 | // rax |
| 1 << 1 | // rcx |
| 1 << 2 | // rdx |
| 1 << 3 | // rbx - used as a caller-saved register in JavaScript code |
| 1 << 7; // rdi - callee function |
| |
| const int kNumJSCallerSaved = 5; |
| |
| // Number of registers for which space is reserved in safepoints. |
| const int kNumSafepointRegisters = 16; |
| |
| // ---------------------------------------------------- |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| #ifdef _WIN64 |
| static const int kCalleeSaveXMMRegisters = 10; |
| static const int kXMMRegisterSize = 16; |
| static const int kXMMRegistersBlockSize = |
| kXMMRegisterSize * kCalleeSaveXMMRegisters; |
| static const int kCallerFPOffset = |
| -3 * kPointerSize + -7 * kRegisterSize - kXMMRegistersBlockSize; |
| #else |
| // We have 3 Push and 5 pushq in the JSEntryStub::GenerateBody. |
| static const int kCallerFPOffset = -3 * kPointerSize + -5 * kRegisterSize; |
| #endif |
| static const int kArgvOffset = 6 * kPointerSize; |
| }; |
| |
| |
| class ExitFrameConstants : public AllStatic { |
| public: |
| static const int kFrameSize = 2 * kPointerSize; |
| |
| static const int kCodeOffset = -2 * kPointerSize; |
| static const int kSPOffset = -1 * kPointerSize; |
| |
| static const int kCallerFPOffset = +0 * kPointerSize; |
| static const int kCallerPCOffset = kFPOnStackSize; |
| |
| // FP-relative displacement of the caller's SP. It points just |
| // below the saved PC. |
| static const int kCallerSPDisplacement = kCallerPCOffset + kPCOnStackSize; |
| |
| static const int kConstantPoolOffset = 0; // Not used |
| }; |
| |
| |
| class JavaScriptFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
| static const int kLastParameterOffset = kFPOnStackSize + kPCOnStackSize; |
| static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
| |
| // Caller SP-relative. |
| static const int kParam0Offset = -2 * kPointerSize; |
| static const int kReceiverOffset = -1 * kPointerSize; |
| }; |
| |
| |
| 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 kImplicitReceiverOffset = -5 * kPointerSize; |
| static const int kConstructorOffset = kMinInt; |
| static const int kLengthOffset = -4 * kPointerSize; |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| |
| static const int kFrameSize = |
| StandardFrameConstants::kFixedFrameSize + 3 * 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) { |
| if (kFPOnStackSize == 2 * kPointerSize) { |
| // Zero out the high-32 bit of FP for x32 port. |
| Memory::Address_at(slot + kPointerSize) = 0; |
| } |
| Memory::Address_at(slot) = fp; |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_X64_FRAMES_X64_H_ |