| // Copyright 2014 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_PPC_FRAMES_PPC_H_ |
| #define V8_PPC_FRAMES_PPC_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Register list in load/store instructions |
| // Note that the bit values must match those used in actual instruction encoding |
| const int kNumRegs = 32; |
| |
| |
| // Caller-saved/arguments registers |
| const RegList kJSCallerSaved = 1 << 3 | // r3 a1 |
| 1 << 4 | // r4 a2 |
| 1 << 5 | // r5 a3 |
| 1 << 6 | // r6 a4 |
| 1 << 7 | // r7 a5 |
| 1 << 8 | // r8 a6 |
| 1 << 9 | // r9 a7 |
| 1 << 10 | // r10 a8 |
| 1 << 11; |
| |
| const int kNumJSCallerSaved = 9; |
| |
| // Return the code of the n-th caller-saved register available to JavaScript |
| // e.g. JSCallerSavedReg(0) returns r0.code() == 0 |
| int JSCallerSavedCode(int n); |
| |
| |
| // Callee-saved registers preserved when switching from C to JavaScript |
| const RegList kCalleeSaved = 1 << 14 | // r14 |
| 1 << 15 | // r15 |
| 1 << 16 | // r16 |
| 1 << 17 | // r17 |
| 1 << 18 | // r18 |
| 1 << 19 | // r19 |
| 1 << 20 | // r20 |
| 1 << 21 | // r21 |
| 1 << 22 | // r22 |
| 1 << 23 | // r23 |
| 1 << 24 | // r24 |
| 1 << 25 | // r25 |
| 1 << 26 | // r26 |
| 1 << 27 | // r27 |
| 1 << 28 | // r28 |
| 1 << 29 | // r29 |
| 1 << 30 | // r20 |
| 1 << 31; // r31 |
| |
| |
| const int kNumCalleeSaved = 18; |
| |
| // Number of registers for which space is reserved in safepoints. Must be a |
| // multiple of 8. |
| // TODO(regis): Only 8 registers may actually be sufficient. Revisit. |
| 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. |
| const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; |
| const int kNumSafepointSavedRegisters = kNumJSCallerSaved + kNumCalleeSaved; |
| |
| // The following constants describe the stack frame linkage area as |
| // defined by the ABI. Note that kNumRequiredStackFrameSlots must |
| // satisfy alignment requirements (rounding up if required). |
| #if V8_TARGET_ARCH_PPC64 && V8_TARGET_LITTLE_ENDIAN |
| // [0] back chain |
| // [1] condition register save area |
| // [2] link register save area |
| // [3] TOC save area |
| // [4] Parameter1 save area |
| // ... |
| // [11] Parameter8 save area |
| // [12] Parameter9 slot (if necessary) |
| // ... |
| const int kNumRequiredStackFrameSlots = 12; |
| const int kStackFrameLRSlot = 2; |
| const int kStackFrameExtraParamSlot = 12; |
| #elif V8_OS_AIX || V8_TARGET_ARCH_PPC64 |
| // [0] back chain |
| // [1] condition register save area |
| // [2] link register save area |
| // [3] reserved for compiler |
| // [4] reserved by binder |
| // [5] TOC save area |
| // [6] Parameter1 save area |
| // ... |
| // [13] Parameter8 save area |
| // [14] Parameter9 slot (if necessary) |
| // ... |
| #if V8_TARGET_ARCH_PPC64 |
| const int kNumRequiredStackFrameSlots = 14; |
| #else |
| const int kNumRequiredStackFrameSlots = 16; |
| #endif |
| const int kStackFrameLRSlot = 2; |
| const int kStackFrameExtraParamSlot = 14; |
| #else |
| // [0] back chain |
| // [1] link register save area |
| // [2] Parameter9 slot (if necessary) |
| // ... |
| const int kNumRequiredStackFrameSlots = 4; |
| const int kStackFrameLRSlot = 1; |
| const int kStackFrameExtraParamSlot = 2; |
| #endif |
| |
| // ---------------------------------------------------- |
| |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| static const int kCallerFPOffset = |
| -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize); |
| }; |
| |
| |
| class ExitFrameConstants : public AllStatic { |
| public: |
| #if V8_OOL_CONSTANT_POOL |
| static const int kFrameSize = 3 * kPointerSize; |
| static const int kConstantPoolOffset = -3 * kPointerSize; |
| #else |
| static const int kFrameSize = 2 * kPointerSize; |
| static const int kConstantPoolOffset = 0; // Not used. |
| #endif |
| static const int kCodeOffset = -2 * kPointerSize; |
| static const int kSPOffset = -1 * kPointerSize; |
| |
| // The caller fields are below the frame pointer on the stack. |
| static const int kCallerFPOffset = 0 * kPointerSize; |
| // The calling JS function is below FP. |
| 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; |
| }; |
| |
| |
| 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; |
| }; |
| |
| |
| 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 = -6 * kPointerSize; |
| static const int kConstructorOffset = -5 * kPointerSize; |
| static const int kLengthOffset = -4 * kPointerSize; |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| |
| 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_PPC_FRAMES_PPC_H_ |