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 31 namespace v8 { 32 namespace internal { 33 34 const int kNumRegs = 16; 35 const 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 42 const int kNumJSCallerSaved = 5; 43 44 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; 45 46 // Number of registers for which space is reserved in safepoints. 47 const int kNumSafepointRegisters = 16; 48 49 // ---------------------------------------------------- 50 51 class StackHandlerConstants : public AllStatic { 52 public: 53 static const int kNextOffset = 0 * kPointerSize; 54 static const int kCodeOffset = 1 * kPointerSize; 55 static const int kStateOffset = 2 * kPointerSize; 56 static const int kContextOffset = 3 * kPointerSize; 57 static const int kFPOffset = 4 * kPointerSize; 58 59 static const int kSize = kFPOffset + kPointerSize; 60 }; 61 62 63 class EntryFrameConstants : public AllStatic { 64 public: 65 #ifdef _WIN64 66 static const int kCallerFPOffset = -10 * kPointerSize; 67 #else 68 static const int kCallerFPOffset = -8 * kPointerSize; 69 #endif 70 static const int kArgvOffset = 6 * kPointerSize; 71 }; 72 73 74 class ExitFrameConstants : public AllStatic { 75 public: 76 static const int kCodeOffset = -2 * kPointerSize; 77 static const int kSPOffset = -1 * kPointerSize; 78 79 static const int kCallerFPOffset = +0 * kPointerSize; 80 static const int kCallerPCOffset = +1 * kPointerSize; 81 82 // FP-relative displacement of the caller's SP. It points just 83 // below the saved PC. 84 static const int kCallerSPDisplacement = +2 * kPointerSize; 85 }; 86 87 88 class StandardFrameConstants : public AllStatic { 89 public: 90 // Fixed part of the frame consists of return address, caller fp, 91 // context and function. 92 static const int kFixedFrameSize = 4 * kPointerSize; 93 static const int kExpressionsOffset = -3 * kPointerSize; 94 static const int kMarkerOffset = -2 * kPointerSize; 95 static const int kContextOffset = -1 * kPointerSize; 96 static const int kCallerFPOffset = 0 * kPointerSize; 97 static const int kCallerPCOffset = +1 * kPointerSize; 98 static const int kCallerSPOffset = +2 * kPointerSize; 99 }; 100 101 102 class JavaScriptFrameConstants : public AllStatic { 103 public: 104 // FP-relative. 105 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 106 static const int kLastParameterOffset = +2 * kPointerSize; 107 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 108 109 // Caller SP-relative. 110 static const int kParam0Offset = -2 * kPointerSize; 111 static const int kReceiverOffset = -1 * kPointerSize; 112 }; 113 114 115 class ArgumentsAdaptorFrameConstants : public AllStatic { 116 public: 117 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 118 static const int kFrameSize = 119 StandardFrameConstants::kFixedFrameSize + kPointerSize; 120 }; 121 122 123 class InternalFrameConstants : public AllStatic { 124 public: 125 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 126 }; 127 128 129 inline Object* JavaScriptFrame::function_slot_object() const { 130 const int offset = JavaScriptFrameConstants::kFunctionOffset; 131 return Memory::Object_at(fp() + offset); 132 } 133 134 } } // namespace v8::internal 135 136 #endif // V8_X64_FRAMES_X64_H_ 137
