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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 static const int kNumRegs = 8;
40 // Caller-saved registers
41 static const RegList kJSCallerSaved =
45 1 << 3 | // ebx - used as a caller-saved register in JavaScript code
46 1 << 7; // edi - callee function
48 static const int kNumJSCallerSaved = 5;
50 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
52 // ----------------------------------------------------
55 class StackHandlerConstants : public AllStatic {
57 static const int kNextOffset = 0 * kPointerSize;
58 static const int kFPOffset = 1 * kPointerSize;
60 static const int kStateOffset = 2 * kPointerSize;
61 static const int kPCOffset = 3 * kPointerSize;
63 static const int kAddressDisplacement = -1 * kPointerSize;
64 static const int kSize = kPCOffset + kPointerSize;
68 class EntryFrameConstants : public AllStatic {
70 static const int kCallerFPOffset = -6 * kPointerSize;
72 static const int kFunctionArgOffset = +3 * kPointerSize;
73 static const int kReceiverArgOffset = +4 * kPointerSize;
74 static const int kArgcOffset = +5 * kPointerSize;
75 static const int kArgvOffset = +6 * kPointerSize;
79 class ExitFrameConstants : public AllStatic {
81 static const int kDebugMarkOffset = -2 * kPointerSize;
82 static const int kSPOffset = -1 * kPointerSize;
84 // Let the parameters pointer for exit frames point just below the
85 // frame structure on the stack (frame pointer and return address).
86 static const int kPPDisplacement = +2 * kPointerSize;
88 static const int kCallerFPOffset = 0 * kPointerSize;
89 static const int kCallerPCOffset = +1 * kPointerSize;
93 class StandardFrameConstants : public AllStatic {
95 static const int kExpressionsOffset = -3 * kPointerSize;
96 static const int kMarkerOffset = -2 * kPointerSize;
97 static const int kContextOffset = -1 * kPointerSize;
98 static const int kCallerFPOffset = 0 * kPointerSize;
99 static const int kCallerPCOffset = +1 * kPointerSize;
100 static const int kCallerSPOffset = +2 * kPointerSize;
104 class JavaScriptFrameConstants : public AllStatic {
107 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
108 static const int kSavedRegistersOffset = +2 * kPointerSize;
109 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
111 // CallerSP-relative (aka PP-relative)
112 static const int kParam0Offset = -2 * kPointerSize;
113 static const int kReceiverOffset = -1 * kPointerSize;
117 class ArgumentsAdaptorFrameConstants : public AllStatic {
119 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
123 class InternalFrameConstants : public AllStatic {
125 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
129 inline Object* JavaScriptFrame::function_slot_object() const {
130 const int offset = JavaScriptFrameConstants::kFunctionOffset;
131 return Memory::Object_at(fp() + offset);
135 } } // namespace v8::internal
137 #endif // V8_IA32_FRAMES_IA32_H_