1 // Copyright 2009 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 static const int kNumRegs = 8;
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 class 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
57 class EntryFrameConstants : public AllStatic {
58 public:
59 static const int kCallerFPOffset = -10 * kPointerSize;
60 static const int kArgvOffset = 6 * kPointerSize;
61 };
62
63
64 class 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
78 class 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
89 class 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
102 class ArgumentsAdaptorFrameConstants : public AllStatic {
103 public:
104 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
105 };
106
107
108 class InternalFrameConstants : public AllStatic {
109 public:
110 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
111 };
112
113
function_slot_object()114 inline 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