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
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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
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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
function_slot_object()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