| // 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_IA32_FRAMES_IA32_H_ |
| #define V8_IA32_FRAMES_IA32_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Register lists |
| // Note that the bit values must match those used in actual instruction encoding |
| const int kNumRegs = 8; |
| |
| |
| // Caller-saved registers |
| const RegList kJSCallerSaved = |
| 1 << 0 | // eax |
| 1 << 1 | // ecx |
| 1 << 2 | // edx |
| 1 << 3 | // ebx - used as a caller-saved register in JavaScript code |
| 1 << 7; // edi - callee function |
| |
| const int kNumJSCallerSaved = 5; |
| |
| |
| // Number of registers for which space is reserved in safepoints. |
| const int kNumSafepointRegisters = 8; |
| |
| const int kNoAlignmentPadding = 0; |
| const int kAlignmentPaddingPushed = 2; |
| const int kAlignmentZapValue = 0x12345678; // Not heap object tagged. |
| |
| // ---------------------------------------------------- |
| |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| static const int kCallerFPOffset = -6 * kPointerSize; |
| |
| static const int kFunctionArgOffset = +3 * kPointerSize; |
| static const int kReceiverArgOffset = +4 * kPointerSize; |
| static const int kArgcOffset = +5 * kPointerSize; |
| 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 = +1 * kPointerSize; |
| |
| // FP-relative displacement of the caller's SP. It points just |
| // below the saved PC. |
| static const int kCallerSPDisplacement = +2 * kPointerSize; |
| |
| static const int kConstantPoolOffset = 0; // Not used |
| }; |
| |
| |
| class JavaScriptFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
| static const int kLastParameterOffset = +2 * kPointerSize; |
| static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
| |
| // Caller SP-relative. |
| static const int kParam0Offset = -2 * kPointerSize; |
| static const int kReceiverOffset = -1 * kPointerSize; |
| |
| static const int kDynamicAlignmentStateOffset = kLocal0Offset; |
| }; |
| |
| |
| 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) { |
| Memory::Address_at(slot) = fp; |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_IA32_FRAMES_IA32_H_ |