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frames-ia32.h
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27 
28 #ifndef V8_IA32_FRAMES_IA32_H_
29 #define V8_IA32_FRAMES_IA32_H_
30 
31 namespace v8 {
32 namespace internal {
33 
34 
35 // Register lists
36 // Note that the bit values must match those used in actual instruction encoding
37 const int kNumRegs = 8;
38 
39 
40 // Caller-saved registers
41 const RegList kJSCallerSaved =
42  1 << 0 | // eax
43  1 << 1 | // ecx
44  1 << 2 | // edx
45  1 << 3 | // ebx - used as a caller-saved register in JavaScript code
46  1 << 7; // edi - callee function
47 
48 const int kNumJSCallerSaved = 5;
49 
51 
52 
53 // Number of registers for which space is reserved in safepoints.
54 const int kNumSafepointRegisters = 8;
55 
56 const int kNoAlignmentPadding = 0;
58 const int kAlignmentZapValue = 0x12345678; // Not heap object tagged.
59 
60 // ----------------------------------------------------
61 
62 
63 class StackHandlerConstants : public AllStatic {
64  public:
65  static const int kNextOffset = 0 * kPointerSize;
66  static const int kCodeOffset = 1 * kPointerSize;
67  static const int kStateOffset = 2 * kPointerSize;
68  static const int kContextOffset = 3 * kPointerSize;
69  static const int kFPOffset = 4 * kPointerSize;
70 
71  static const int kSize = kFPOffset + kPointerSize;
72 };
73 
74 
75 class EntryFrameConstants : public AllStatic {
76  public:
77  static const int kCallerFPOffset = -6 * kPointerSize;
78 
79  static const int kFunctionArgOffset = +3 * kPointerSize;
80  static const int kReceiverArgOffset = +4 * kPointerSize;
81  static const int kArgcOffset = +5 * kPointerSize;
82  static const int kArgvOffset = +6 * kPointerSize;
83 };
84 
85 
86 class ExitFrameConstants : public AllStatic {
87  public:
88  static const int kCodeOffset = -2 * kPointerSize;
89  static const int kSPOffset = -1 * kPointerSize;
90 
91  static const int kCallerFPOffset = 0 * kPointerSize;
92  static const int kCallerPCOffset = +1 * kPointerSize;
93 
94  // FP-relative displacement of the caller's SP. It points just
95  // below the saved PC.
96  static const int kCallerSPDisplacement = +2 * kPointerSize;
97 };
98 
99 
100 class StandardFrameConstants : public AllStatic {
101  public:
102  // Fixed part of the frame consists of return address, caller fp,
103  // context and function.
104  // StandardFrame::IterateExpressions assumes that kContextOffset is the last
105  // object pointer.
106  static const int kFixedFrameSize = 4 * kPointerSize;
107  static const int kExpressionsOffset = -3 * kPointerSize;
108  static const int kMarkerOffset = -2 * kPointerSize;
109  static const int kContextOffset = -1 * kPointerSize;
110  static const int kCallerFPOffset = 0 * kPointerSize;
111  static const int kCallerPCOffset = +1 * kPointerSize;
112  static const int kCallerSPOffset = +2 * kPointerSize;
113 };
114 
115 
116 class JavaScriptFrameConstants : public AllStatic {
117  public:
118  // FP-relative.
120  static const int kLastParameterOffset = +2 * kPointerSize;
122 
123  // Caller SP-relative.
124  static const int kParam0Offset = -2 * kPointerSize;
125  static const int kReceiverOffset = -1 * kPointerSize;
126 
128 };
129 
130 
132  public:
134  static const int kFrameSize =
136 };
137 
138 
139 class InternalFrameConstants : public AllStatic {
140  public:
142 };
143 
144 
145 inline Object* JavaScriptFrame::function_slot_object() const {
147  return Memory::Object_at(fp() + offset);
148 }
149 
150 
151 } } // namespace v8::internal
152 
153 #endif // V8_IA32_FRAMES_IA32_H_
static Object *& Object_at(Address addr)
Definition: v8memory.h:75
uint32_t RegList
Definition: frames.h:38
const int kNoAlignmentPadding
Definition: frames-ia32.h:56
const RegList kJSCallerSaved
Definition: frames-arm.h:47
const int kAlignmentPaddingPushed
Definition: frames-ia32.h:57
static const int kCallerPCOffset
Definition: frames-arm.h:129
static const int kCallerFPOffset
Definition: frames-arm.h:127
const int kPointerSize
Definition: globals.h:220
static const int kDynamicAlignmentStateOffset
Definition: frames-ia32.h:127
const int kNumJSCallerSaved
Definition: frames-arm.h:53
const int kAlignmentZapValue
Definition: frames-ia32.h:58
static const int kArgcOffset
Definition: frames-ia32.h:81
static const int kFunctionArgOffset
Definition: frames-ia32.h:79
static const int kCallerSPDisplacement
Definition: frames-arm.h:133
static const int kCallerFPOffset
Definition: frames-arm.h:117
const int kNumSafepointRegisters
Definition: frames-arm.h:92
static const int kReceiverArgOffset
Definition: frames-ia32.h:80
Object * JSCallerSavedBuffer[kNumJSCallerSaved]
Definition: frames-arm.h:55
static const int kArgvOffset
Definition: frames-ia32.h:82
const Register fp
const int kNumRegs
Definition: frames-arm.h:43