1 // Copyright 2012 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 const int kNumRegs = 16;
35 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 const int kNumJSCallerSaved = 5;
43
44 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
45
46 // Number of registers for which space is reserved in safepoints.
47 const int kNumSafepointRegisters = 16;
48
49 // ----------------------------------------------------
50
51 class EntryFrameConstants : public AllStatic {
52 public:
53 #ifdef _WIN64
54 static const int kCalleeSaveXMMRegisters = 10;
55 static const int kXMMRegisterSize = 16;
56 static const int kXMMRegistersBlockSize =
57 kXMMRegisterSize * kCalleeSaveXMMRegisters;
58 static const int kCallerFPOffset =
59 -10 * kPointerSize - kXMMRegistersBlockSize;
60 #else
61 static const int kCallerFPOffset = -8 * kPointerSize;
62 #endif
63 static const int kArgvOffset = 6 * kPointerSize;
64 };
65
66
67 class ExitFrameConstants : public AllStatic {
68 public:
69 static const int kCodeOffset = -2 * kPointerSize;
70 static const int kSPOffset = -1 * kPointerSize;
71
72 static const int kCallerFPOffset = +0 * kPointerSize;
73 static const int kCallerPCOffset = kFPOnStackSize;
74
75 // FP-relative displacement of the caller's SP. It points just
76 // below the saved PC.
77 static const int kCallerSPDisplacement = kCallerPCOffset + kPCOnStackSize;
78 };
79
80
81 class JavaScriptFrameConstants : public AllStatic {
82 public:
83 // FP-relative.
84 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
85 static const int kLastParameterOffset = kFPOnStackSize + kPCOnStackSize;
86 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
87
88 // Caller SP-relative.
89 static const int kParam0Offset = -2 * kPointerSize;
90 static const int kReceiverOffset = -1 * kPointerSize;
91 };
92
93
94 class ArgumentsAdaptorFrameConstants : public AllStatic {
95 public:
96 // FP-relative.
97 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
98
99 static const int kFrameSize =
100 StandardFrameConstants::kFixedFrameSize + kPointerSize;
101 };
102
103
104 class ConstructFrameConstants : public AllStatic {
105 public:
106 // FP-relative.
107 static const int kImplicitReceiverOffset = -5 * kPointerSize;
108 static const int kConstructorOffset = kMinInt;
109 static const int kLengthOffset = -4 * kPointerSize;
110 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
111
112 static const int kFrameSize =
113 StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize;
114 };
115
116
117 class InternalFrameConstants : public AllStatic {
118 public:
119 // FP-relative.
120 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
121 };
122
123
function_slot_object()124 inline Object* JavaScriptFrame::function_slot_object() const {
125 const int offset = JavaScriptFrameConstants::kFunctionOffset;
126 return Memory::Object_at(fp() + offset);
127 }
128
129
SetFp(Address slot,Address fp)130 inline void StackHandler::SetFp(Address slot, Address fp) {
131 Memory::Address_at(slot) = fp;
132 }
133
134
135 } } // namespace v8::internal
136
137 #endif // V8_X64_FRAMES_X64_H_
138