1// Copyright 2013 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#include "src/arm64/assembler-arm64.h" 6#include "src/arm64/constants-arm64.h" 7 8#ifndef V8_ARM64_FRAMES_ARM64_H_ 9#define V8_ARM64_FRAMES_ARM64_H_ 10 11namespace v8 { 12namespace internal { 13 14const int kNumRegs = kNumberOfRegisters; 15// Registers x0-x17 are caller-saved. 16const int kNumJSCallerSaved = 18; 17const RegList kJSCallerSaved = 0x3ffff; 18 19// Number of registers for which space is reserved in safepoints. Must be a 20// multiple of eight. 21// TODO(all): Refine this number. 22const int kNumSafepointRegisters = 32; 23 24// Define the list of registers actually saved at safepoints. 25// Note that the number of saved registers may be smaller than the reserved 26// space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. 27#define kSafepointSavedRegisters CPURegList::GetSafepointSavedRegisters().list() 28#define kNumSafepointSavedRegisters \ 29 CPURegList::GetSafepointSavedRegisters().Count(); 30 31class EntryFrameConstants : public AllStatic { 32 public: 33 static const int kCallerFPOffset = 34 -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize); 35}; 36 37 38class ExitFrameConstants : public AllStatic { 39 public: 40 static const int kFrameSize = 2 * kPointerSize; 41 42 static const int kCallerSPDisplacement = 2 * kPointerSize; 43 static const int kCallerPCOffset = 1 * kPointerSize; 44 static const int kCallerFPOffset = 0 * kPointerSize; // <- fp 45 static const int kSPOffset = -1 * kPointerSize; 46 static const int kCodeOffset = -2 * kPointerSize; 47 static const int kLastExitFrameField = kCodeOffset; 48 49 static const int kConstantPoolOffset = 0; // Not used 50}; 51 52 53class JavaScriptFrameConstants : public AllStatic { 54 public: 55 // FP-relative. 56 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; 57 58 // There are two words on the stack (saved fp and saved lr) between fp and 59 // the arguments. 60 static const int kLastParameterOffset = 2 * kPointerSize; 61 62 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; 63}; 64 65 66class ArgumentsAdaptorFrameConstants : public AllStatic { 67 public: 68 // FP-relative. 69 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; 70 71 static const int kFrameSize = 72 StandardFrameConstants::kFixedFrameSize + kPointerSize; 73}; 74 75 76class ConstructFrameConstants : public AllStatic { 77 public: 78 // FP-relative. 79 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 80 static const int kLengthOffset = -4 * kPointerSize; 81 static const int kConstructorOffset = -5 * kPointerSize; 82 static const int kImplicitReceiverOffset = -6 * kPointerSize; 83 84 static const int kFrameSize = 85 StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize; 86}; 87 88 89class InternalFrameConstants : public AllStatic { 90 public: 91 // FP-relative. 92 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; 93}; 94 95 96inline Object* JavaScriptFrame::function_slot_object() const { 97 const int offset = JavaScriptFrameConstants::kFunctionOffset; 98 return Memory::Object_at(fp() + offset); 99} 100 101 102inline void StackHandler::SetFp(Address slot, Address fp) { 103 Memory::Address_at(slot) = fp; 104} 105 106 107} } // namespace v8::internal 108 109#endif // V8_ARM64_FRAMES_ARM64_H_ 110