1 // Copyright 2012 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_X64_FRAMES_X64_H_ 6 #define V8_X64_FRAMES_X64_H_ 7 8 namespace v8 { 9 namespace internal { 10 11 const int kNumRegs = 16; 12 const RegList kJSCallerSaved = 13 1 << 0 | // rax 14 1 << 1 | // rcx 15 1 << 2 | // rdx 16 1 << 3 | // rbx - used as a caller-saved register in JavaScript code 17 1 << 7; // rdi - callee function 18 19 const int kNumJSCallerSaved = 5; 20 21 // Number of registers for which space is reserved in safepoints. 22 const int kNumSafepointRegisters = 16; 23 24 // ---------------------------------------------------- 25 26 class EntryFrameConstants : public AllStatic { 27 public: 28 #ifdef _WIN64 29 static const int kCalleeSaveXMMRegisters = 10; 30 static const int kXMMRegisterSize = 16; 31 static const int kXMMRegistersBlockSize = 32 kXMMRegisterSize * kCalleeSaveXMMRegisters; 33 static const int kCallerFPOffset = 34 -3 * kPointerSize + -7 * kRegisterSize - kXMMRegistersBlockSize; 35 #else 36 // We have 3 Push and 5 pushq in the JSEntryStub::GenerateBody. 37 static const int kCallerFPOffset = -3 * kPointerSize + -5 * kRegisterSize; 38 #endif 39 static const int kArgvOffset = 6 * kPointerSize; 40 }; 41 42 43 class ExitFrameConstants : public AllStatic { 44 public: 45 static const int kFrameSize = 2 * kPointerSize; 46 47 static const int kCodeOffset = -2 * kPointerSize; 48 static const int kSPOffset = -1 * kPointerSize; 49 50 static const int kCallerFPOffset = +0 * kPointerSize; 51 static const int kCallerPCOffset = kFPOnStackSize; 52 53 // FP-relative displacement of the caller's SP. It points just 54 // below the saved PC. 55 static const int kCallerSPDisplacement = kCallerPCOffset + kPCOnStackSize; 56 57 static const int kConstantPoolOffset = 0; // Not used 58 }; 59 60 61 class JavaScriptFrameConstants : public AllStatic { 62 public: 63 // FP-relative. 64 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 65 static const int kLastParameterOffset = kFPOnStackSize + kPCOnStackSize; 66 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 67 68 // Caller SP-relative. 69 static const int kParam0Offset = -2 * kPointerSize; 70 static const int kReceiverOffset = -1 * kPointerSize; 71 }; 72 73 74 class ArgumentsAdaptorFrameConstants : public AllStatic { 75 public: 76 // FP-relative. 77 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 78 79 static const int kFrameSize = 80 StandardFrameConstants::kFixedFrameSize + kPointerSize; 81 }; 82 83 84 class ConstructFrameConstants : public AllStatic { 85 public: 86 // FP-relative. 87 static const int kImplicitReceiverOffset = -5 * kPointerSize; 88 static const int kConstructorOffset = kMinInt; 89 static const int kLengthOffset = -4 * kPointerSize; 90 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 91 92 static const int kFrameSize = 93 StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize; 94 }; 95 96 97 class InternalFrameConstants : public AllStatic { 98 public: 99 // FP-relative. 100 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 101 }; 102 103 104 inline Object* JavaScriptFrame::function_slot_object() const { 105 const int offset = JavaScriptFrameConstants::kFunctionOffset; 106 return Memory::Object_at(fp() + offset); 107 } 108 109 110 inline void StackHandler::SetFp(Address slot, Address fp) { 111 if (kFPOnStackSize == 2 * kPointerSize) { 112 // Zero out the high-32 bit of FP for x32 port. 113 Memory::Address_at(slot + kPointerSize) = 0; 114 } 115 Memory::Address_at(slot) = fp; 116 } 117 118 119 } } // namespace v8::internal 120 121 #endif // V8_X64_FRAMES_X64_H_ 122
