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3 // modification, are permitted provided that the following conditions are
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28 #ifndef V8_IA32_FRAMES_IA32_H_
29 #define V8_IA32_FRAMES_IA32_H_
36 // Note that the bit values must match those used in actual instruction encoding
37 const int kNumRegs = 8;
40 // Caller-saved registers
41 const RegList kJSCallerSaved =
45 1 << 3 | // ebx - used as a caller-saved register in JavaScript code
46 1 << 7; // edi - callee function
48 const int kNumJSCallerSaved = 5;
50 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
53 // Number of registers for which space is reserved in safepoints.
54 const int kNumSafepointRegisters = 8;
56 const int kNoAlignmentPadding = 0;
57 const int kAlignmentPaddingPushed = 2;
58 const int kAlignmentZapValue = 0x12345678; // Not heap object tagged.
60 // ----------------------------------------------------
63 class EntryFrameConstants : public AllStatic {
65 static const int kCallerFPOffset = -6 * kPointerSize;
67 static const int kFunctionArgOffset = +3 * kPointerSize;
68 static const int kReceiverArgOffset = +4 * kPointerSize;
69 static const int kArgcOffset = +5 * kPointerSize;
70 static const int kArgvOffset = +6 * kPointerSize;
74 class ExitFrameConstants : public AllStatic {
76 static const int kCodeOffset = -2 * kPointerSize;
77 static const int kSPOffset = -1 * kPointerSize;
79 static const int kCallerFPOffset = 0 * kPointerSize;
80 static const int kCallerPCOffset = +1 * kPointerSize;
82 // FP-relative displacement of the caller's SP. It points just
83 // below the saved PC.
84 static const int kCallerSPDisplacement = +2 * kPointerSize;
88 class JavaScriptFrameConstants : public AllStatic {
91 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
92 static const int kLastParameterOffset = +2 * kPointerSize;
93 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
95 // Caller SP-relative.
96 static const int kParam0Offset = -2 * kPointerSize;
97 static const int kReceiverOffset = -1 * kPointerSize;
99 static const int kDynamicAlignmentStateOffset = kLocal0Offset;
103 class ArgumentsAdaptorFrameConstants : public AllStatic {
106 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
108 static const int kFrameSize =
109 StandardFrameConstants::kFixedFrameSize + kPointerSize;
113 class ConstructFrameConstants : public AllStatic {
116 static const int kImplicitReceiverOffset = -5 * kPointerSize;
117 static const int kConstructorOffset = kMinInt;
118 static const int kLengthOffset = -4 * kPointerSize;
119 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
121 static const int kFrameSize =
122 StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize;
126 class InternalFrameConstants : public AllStatic {
129 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
133 inline Object* JavaScriptFrame::function_slot_object() const {
134 const int offset = JavaScriptFrameConstants::kFunctionOffset;
135 return Memory::Object_at(fp() + offset);
139 } } // namespace v8::internal
141 #endif // V8_IA32_FRAMES_IA32_H_