1// Copyright 2012 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#ifndef V8_X64_FRAMES_X64_H_ 29#define V8_X64_FRAMES_X64_H_ 30 31namespace v8 { 32namespace internal { 33 34const int kNumRegs = 16; 35const RegList kJSCallerSaved = 36 1 << 0 | // rax 37 1 << 1 | // rcx 38 1 << 2 | // rdx 39 1 << 3 | // rbx - used as a caller-saved register in JavaScript code 40 1 << 7; // rdi - callee function 41 42const int kNumJSCallerSaved = 5; 43 44typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; 45 46// Number of registers for which space is reserved in safepoints. 47const int kNumSafepointRegisters = 16; 48 49// ---------------------------------------------------- 50 51class EntryFrameConstants : public AllStatic { 52 public: 53#ifdef _WIN64 54 static const int kCalleeSaveXMMRegisters = 10; 55 static const int kXMMRegisterSize = 16; 56 static const int kXMMRegistersBlockSize = 57 kXMMRegisterSize * kCalleeSaveXMMRegisters; 58 static const int kCallerFPOffset = 59 -10 * kPointerSize - kXMMRegistersBlockSize; 60#else 61 static const int kCallerFPOffset = -8 * kPointerSize; 62#endif 63 static const int kArgvOffset = 6 * kPointerSize; 64}; 65 66 67class ExitFrameConstants : public AllStatic { 68 public: 69 static const int kCodeOffset = -2 * kPointerSize; 70 static const int kSPOffset = -1 * kPointerSize; 71 72 static const int kCallerFPOffset = +0 * kPointerSize; 73 static const int kCallerPCOffset = kFPOnStackSize; 74 75 // FP-relative displacement of the caller's SP. It points just 76 // below the saved PC. 77 static const int kCallerSPDisplacement = kCallerPCOffset + kPCOnStackSize; 78}; 79 80 81class JavaScriptFrameConstants : public AllStatic { 82 public: 83 // FP-relative. 84 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 85 static const int kLastParameterOffset = kFPOnStackSize + kPCOnStackSize; 86 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 87 88 // Caller SP-relative. 89 static const int kParam0Offset = -2 * kPointerSize; 90 static const int kReceiverOffset = -1 * kPointerSize; 91}; 92 93 94class ArgumentsAdaptorFrameConstants : public AllStatic { 95 public: 96 // FP-relative. 97 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 98 99 static const int kFrameSize = 100 StandardFrameConstants::kFixedFrameSize + kPointerSize; 101}; 102 103 104class ConstructFrameConstants : public AllStatic { 105 public: 106 // FP-relative. 107 static const int kImplicitReceiverOffset = -5 * kPointerSize; 108 static const int kConstructorOffset = kMinInt; 109 static const int kLengthOffset = -4 * kPointerSize; 110 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 111 112 static const int kFrameSize = 113 StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize; 114}; 115 116 117class InternalFrameConstants : public AllStatic { 118 public: 119 // FP-relative. 120 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 121}; 122 123 124inline Object* JavaScriptFrame::function_slot_object() const { 125 const int offset = JavaScriptFrameConstants::kFunctionOffset; 126 return Memory::Object_at(fp() + offset); 127} 128 129 130inline void StackHandler::SetFp(Address slot, Address fp) { 131 Memory::Address_at(slot) = fp; 132} 133 134 135} } // namespace v8::internal 136 137#endif // V8_X64_FRAMES_X64_H_ 138