frames-mips.cc revision f7060e27768c550ace7ec48ad8c093466db52dfa 
1// Copyright 2010 the V8 project authors. All rights reserved.
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27
28
29#include "v8.h"
30
31#if defined(V8_TARGET_ARCH_MIPS)
32
33#include "frames-inl.h"
34#include "mips/assembler-mips-inl.h"
35
36namespace v8 {
37namespace internal {
38
39
40StackFrame::Type StackFrame::ComputeType(State* state) {
41  ASSERT(state->fp != NULL);
42  if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
43    return ARGUMENTS_ADAPTOR;
44  }
45  // The marker and function offsets overlap. If the marker isn't a
46  // smi then the frame is a JavaScript frame -- and the marker is
47  // really the function.
48  const int offset = StandardFrameConstants::kMarkerOffset;
49  Object* marker = Memory::Object_at(state->fp + offset);
50  if (!marker->IsSmi()) return JAVA_SCRIPT;
51  return static_cast<StackFrame::Type>(Smi::cast(marker)->value());
52}
53
54
55StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) {
56  if (fp == 0) return NONE;
57  // Compute frame type and stack pointer.
58  Address sp = fp + ExitFrameConstants::kSPDisplacement;
59  const int offset = ExitFrameConstants::kCodeOffset;
60  Object* code = Memory::Object_at(fp + offset);
61  bool is_debug_exit = code->IsSmi();
62  if (is_debug_exit) {
63    sp -= kNumJSCallerSaved * kPointerSize;
64  }
65  // Fill in the state.
66  state->sp = sp;
67  state->fp = fp;
68  state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize);
69  return EXIT;
70}
71
72
73void ExitFrame::Iterate(ObjectVisitor* v) const {
74  // Do nothing
75}
76
77
78int JavaScriptFrame::GetProvidedParametersCount() const {
79  return ComputeParametersCount();
80}
81
82
83Address JavaScriptFrame::GetCallerStackPointer() const {
84  UNIMPLEMENTED_MIPS();
85  return static_cast<Address>(NULL);  // UNIMPLEMENTED RETURN
86}
87
88
89Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
90  UNIMPLEMENTED_MIPS();
91  return static_cast<Address>(NULL);  // UNIMPLEMENTED RETURN
92}
93
94
95Address InternalFrame::GetCallerStackPointer() const {
96  return fp() + StandardFrameConstants::kCallerSPOffset;
97}
98
99
100} }  // namespace v8::internal
101
102#endif  // V8_TARGET_ARCH_MIPS
103