1// Copyright 2009 the V8 project authors. All rights reserved.
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3// modification, are permitted provided that the following conditions are
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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