1// Copyright 2009 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 34static const int kNumRegs = 8; 35static 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 42static const int kNumJSCallerSaved = 5; 43 44typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; 45 46class StackHandlerConstants : public AllStatic { 47 public: 48 static const int kNextOffset = 0 * kPointerSize; 49 static const int kFPOffset = 1 * kPointerSize; 50 static const int kStateOffset = 2 * kPointerSize; 51 static const int kPCOffset = 3 * kPointerSize; 52 53 static const int kSize = 4 * kPointerSize; 54}; 55 56 57class EntryFrameConstants : public AllStatic { 58 public: 59 static const int kCallerFPOffset = -10 * kPointerSize; 60 static const int kArgvOffset = 6 * kPointerSize; 61}; 62 63 64class ExitFrameConstants : public AllStatic { 65 public: 66 static const int kCodeOffset = -2 * kPointerSize; 67 static const int kSPOffset = -1 * kPointerSize; 68 69 static const int kCallerFPOffset = +0 * kPointerSize; 70 static const int kCallerPCOffset = +1 * kPointerSize; 71 72 // FP-relative displacement of the caller's SP. It points just 73 // below the saved PC. 74 static const int kCallerSPDisplacement = +2 * kPointerSize; 75}; 76 77 78class StandardFrameConstants : public AllStatic { 79 public: 80 static const int kExpressionsOffset = -3 * kPointerSize; 81 static const int kMarkerOffset = -2 * kPointerSize; 82 static const int kContextOffset = -1 * kPointerSize; 83 static const int kCallerFPOffset = 0 * kPointerSize; 84 static const int kCallerPCOffset = +1 * kPointerSize; 85 static const int kCallerSPOffset = +2 * kPointerSize; 86}; 87 88 89class JavaScriptFrameConstants : public AllStatic { 90 public: 91 // FP-relative. 92 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 93 static const int kSavedRegistersOffset = +2 * kPointerSize; 94 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 95 96 // Caller SP-relative. 97 static const int kParam0Offset = -2 * kPointerSize; 98 static const int kReceiverOffset = -1 * kPointerSize; 99}; 100 101 102class ArgumentsAdaptorFrameConstants : public AllStatic { 103 public: 104 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 105}; 106 107 108class InternalFrameConstants : public AllStatic { 109 public: 110 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 111}; 112 113 114inline Object* JavaScriptFrame::function_slot_object() const { 115 const int offset = JavaScriptFrameConstants::kFunctionOffset; 116 return Memory::Object_at(fp() + offset); 117} 118 119} } // namespace v8::internal 120 121#endif // V8_X64_FRAMES_X64_H_ 122