1 // Copyright 2010 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 static const int kNumRegs = 16; 35 static 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 static const int kNumJSCallerSaved = 5; 43 44 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; 45 46 // Number of registers for which space is reserved in safepoints. 47 static 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 kFPOffset = 1 * kPointerSize; 55 static const int kStateOffset = 2 * kPointerSize; 56 static const int kPCOffset = 3 * kPointerSize; 57 58 static const int kSize = 4 * kPointerSize; 59 }; 60 61 62 class EntryFrameConstants : public AllStatic { 63 public: 64 #ifdef _WIN64 65 static const int kCallerFPOffset = -10 * kPointerSize; 66 #else 67 static const int kCallerFPOffset = -8 * kPointerSize; 68 #endif 69 static const int kArgvOffset = 6 * kPointerSize; 70 }; 71 72 73 class ExitFrameConstants : public AllStatic { 74 public: 75 static const int kCodeOffset = -2 * kPointerSize; 76 static const int kSPOffset = -1 * kPointerSize; 77 78 static const int kCallerFPOffset = +0 * kPointerSize; 79 static const int kCallerPCOffset = +1 * kPointerSize; 80 81 // FP-relative displacement of the caller's SP. It points just 82 // below the saved PC. 83 static const int kCallerSPDisplacement = +2 * kPointerSize; 84 }; 85 86 87 class StandardFrameConstants : public AllStatic { 88 public: 89 static const int kExpressionsOffset = -3 * kPointerSize; 90 static const int kMarkerOffset = -2 * kPointerSize; 91 static const int kContextOffset = -1 * kPointerSize; 92 static const int kCallerFPOffset = 0 * kPointerSize; 93 static const int kCallerPCOffset = +1 * kPointerSize; 94 static const int kCallerSPOffset = +2 * kPointerSize; 95 }; 96 97 98 class JavaScriptFrameConstants : public AllStatic { 99 public: 100 // FP-relative. 101 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 102 static const int kLastParameterOffset = +2 * kPointerSize; 103 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 104 105 // Caller SP-relative. 106 static const int kParam0Offset = -2 * kPointerSize; 107 static const int kReceiverOffset = -1 * kPointerSize; 108 }; 109 110 111 class ArgumentsAdaptorFrameConstants : public AllStatic { 112 public: 113 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 114 }; 115 116 117 class InternalFrameConstants : public AllStatic { 118 public: 119 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 120 }; 121 122 123 inline Object* JavaScriptFrame::function_slot_object() const { 124 const int offset = JavaScriptFrameConstants::kFunctionOffset; 125 return Memory::Object_at(fp() + offset); 126 } 127 128 } } // namespace v8::internal 129 130 #endif // V8_X64_FRAMES_X64_H_ 131
