| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| |
| |
| #ifndef V8_MIPS_FRAMES_MIPS_H_ |
| #define V8_MIPS_FRAMES_MIPS_H_ |
| |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Register lists. |
| // Note that the bit values must match those used in actual instruction |
| // encoding. |
| static const int kNumRegs = 32; |
| |
| static const RegList kJSCallerSaved = |
| 1 << 2 | // v0 |
| 1 << 4 | // a0 |
| 1 << 5 | // a1 |
| 1 << 6 | // a2 |
| 1 << 7; // a3 |
| |
| static const int kNumJSCallerSaved = 5; |
| |
| |
| // Return the code of the n-th caller-saved register available to JavaScript |
| // e.g. JSCallerSavedReg(0) returns a0.code() == 4. |
| int JSCallerSavedCode(int n); |
| |
| |
| // Callee-saved registers preserved when switching from C to JavaScript. |
| static const RegList kCalleeSaved = |
| // Saved temporaries. |
| 1 << 16 | 1 << 17 | 1 << 18 | 1 << 19 | |
| 1 << 20 | 1 << 21 | 1 << 22 | 1 << 23 | |
| // fp. |
| 1 << 30; |
| |
| static const int kNumCalleeSaved = 9; |
| |
| |
| // Number of registers for which space is reserved in safepoints. Must be a |
| // multiple of 8. |
| // TODO(mips): Only 8 registers may actually be sufficient. Revisit. |
| static const int kNumSafepointRegisters = 16; |
| |
| // 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. |
| static const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; |
| static const int kNumSafepointSavedRegisters = |
| kNumJSCallerSaved + kNumCalleeSaved; |
| |
| typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; |
| |
| static const int kUndefIndex = -1; |
| // Map with indexes on stack that corresponds to codes of saved registers. |
| static const int kSafepointRegisterStackIndexMap[kNumRegs] = { |
| kUndefIndex, |
| kUndefIndex, |
| 0, // v0 |
| kUndefIndex, |
| 1, // a0 |
| 2, // a1 |
| 3, // a2 |
| 4, // a3 |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| 5, // Saved temporaries. |
| 6, |
| 7, |
| 8, |
| 9, |
| 10, |
| 11, |
| 12, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| kUndefIndex, |
| 13, // gp |
| 14, // sp |
| 15, // fp |
| kUndefIndex |
| }; |
| |
| |
| // ---------------------------------------------------- |
| |
| class StackHandlerConstants : public AllStatic { |
| public: |
| static const int kNextOffset = 0 * kPointerSize; |
| static const int kStateOffset = 1 * kPointerSize; |
| static const int kContextOffset = 2 * kPointerSize; |
| static const int kFPOffset = 3 * kPointerSize; |
| static const int kPCOffset = 4 * kPointerSize; |
| |
| static const int kSize = kPCOffset + kPointerSize; |
| }; |
| |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| static const int kCallerFPOffset = -3 * kPointerSize; |
| }; |
| |
| |
| class ExitFrameConstants : public AllStatic { |
| public: |
| // See some explanation in MacroAssembler::EnterExitFrame. |
| // This marks the top of the extra allocated stack space. |
| static const int kStackSpaceOffset = -3 * kPointerSize; |
| |
| 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 between FP and PC. |
| static const int kCallerPCOffset = +1 * kPointerSize; |
| |
| // MIPS-specific: a pointer to the old sp to avoid unnecessary calculations. |
| static const int kCallerSPOffset = +2 * kPointerSize; |
| |
| // FP-relative displacement of the caller's SP. |
| static const int kCallerSPDisplacement = +2 * kPointerSize; |
| }; |
| |
| |
| class StandardFrameConstants : public AllStatic { |
| public: |
| static const int kExpressionsOffset = -3 * kPointerSize; |
| static const int kMarkerOffset = -2 * kPointerSize; |
| static const int kContextOffset = -1 * kPointerSize; |
| static const int kCallerFPOffset = 0 * kPointerSize; |
| static const int kCallerPCOffset = +1 * kPointerSize; |
| static const int kCallerSPOffset = +2 * kPointerSize; |
| |
| // Size of the MIPS 4 32-bit argument slots. |
| // This is just an alias with a shorter name. Use it from now on. |
| static const int kRArgsSlotsSize = 4 * kPointerSize; |
| static const int kRegularArgsSlotsSize = kRArgsSlotsSize; |
| |
| // C/C++ argument slots size. |
| static const int kCArgSlotCount = 4; |
| static const int kCArgsSlotsSize = kCArgSlotCount * kPointerSize; |
| // JS argument slots size. |
| static const int kJSArgsSlotsSize = 0 * kPointerSize; |
| // Assembly builtins argument slots size. |
| static const int kBArgsSlotsSize = 0 * 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: |
| static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; |
| }; |
| |
| |
| class InternalFrameConstants : public AllStatic { |
| public: |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| }; |
| |
| |
| inline Object* JavaScriptFrame::function_slot_object() const { |
| const int offset = JavaScriptFrameConstants::kFunctionOffset; |
| return Memory::Object_at(fp() + offset); |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif |