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 StackHandlerConstants : public AllStatic {
52 public:
53 static const int kNextOffset = 0 * kPointerSize;
54 static const int kCodeOffset = 1 * kPointerSize;
55 static const int kStateOffset = 2 * kPointerSize;
56 static const int kContextOffset = 3 * kPointerSize;
57 static const int kFPOffset = 4 * kPointerSize;
58
59 static const int kSize = kFPOffset + kPointerSize;
60 };
61
62
63 class EntryFrameConstants : public AllStatic {
64 public:
65 #ifdef _WIN64
66 static const int kCallerFPOffset = -10 * kPointerSize;
67 #else
68 static const int kCallerFPOffset = -8 * kPointerSize;
69 #endif
70 static const int kArgvOffset = 6 * kPointerSize;
71 };
72
73
74 class ExitFrameConstants : public AllStatic {
75 public:
76 static const int kCodeOffset = -2 * kPointerSize;
77 static const int kSPOffset = -1 * kPointerSize;
78
79 static const int kCallerFPOffset = +0 * kPointerSize;
80 static const int kCallerPCOffset = +1 * kPointerSize;
81
82 // FP-relative displacement of the caller's SP. It points just
83 // below the saved PC.
84 static const int kCallerSPDisplacement = +2 * kPointerSize;
85 };
86
87
88 class StandardFrameConstants : public AllStatic {
89 public:
90 // Fixed part of the frame consists of return address, caller fp,
91 // context and function.
92 static const int kFixedFrameSize = 4 * kPointerSize;
93 static const int kExpressionsOffset = -3 * kPointerSize;
94 static const int kMarkerOffset = -2 * kPointerSize;
95 static const int kContextOffset = -1 * kPointerSize;
96 static const int kCallerFPOffset = 0 * kPointerSize;
97 static const int kCallerPCOffset = +1 * kPointerSize;
98 static const int kCallerSPOffset = +2 * kPointerSize;
99 };
100
101
102 class JavaScriptFrameConstants : public AllStatic {
103 public:
104 // FP-relative.
105 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
106 static const int kLastParameterOffset = +2 * kPointerSize;
107 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
108
109 // Caller SP-relative.
110 static const int kParam0Offset = -2 * kPointerSize;
111 static const int kReceiverOffset = -1 * kPointerSize;
112 };
113
114
115 class ArgumentsAdaptorFrameConstants : public AllStatic {
116 public:
117 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
118 static const int kFrameSize =
119 StandardFrameConstants::kFixedFrameSize + kPointerSize;
120 };
121
122
123 class InternalFrameConstants : public AllStatic {
124 public:
125 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
126 };
127
128
function_slot_object()129 inline Object* JavaScriptFrame::function_slot_object() const {
130 const int offset = JavaScriptFrameConstants::kFunctionOffset;
131 return Memory::Object_at(fp() + offset);
132 }
133
134 } } // namespace v8::internal
135
136 #endif // V8_X64_FRAMES_X64_H_
137