1  // Copyright 2013 Google LLC
 2  //
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28  
29  // stackwalker_ppc64.h: ppc-specific stackwalker.
30  //
31  // Provides stack frames given ppc64 register context and a memory region
32  // corresponding to a ppc64 stack.
33  
34  
35  #ifndef PROCESSOR_STACKWALKER_PPC64_H__
36  #define PROCESSOR_STACKWALKER_PPC64_H__
37  
38  
39  #include "google_breakpad/common/breakpad_types.h"
40  #include "google_breakpad/common/minidump_format.h"
41  #include "google_breakpad/processor/stackwalker.h"
42  
43  namespace google_breakpad {
44  
45  class CodeModules;
46  
47  class StackwalkerPPC64 : public Stackwalker {
48   public:
49    // context is a ppc64 context object that gives access to ppc64-specific
50    // register state corresponding to the innermost called frame to be
51    // included in the stack.  The other arguments are passed directly through
52    // to the base Stackwalker constructor.
53    StackwalkerPPC64(const SystemInfo* system_info,
54                     const MDRawContextPPC64* context,
55                     MemoryRegion* memory,
56                     const CodeModules* modules,
57                     StackFrameSymbolizer* frame_symbolizer);
58  
59   private:
60    // Implementation of Stackwalker, using ppc64 context (stack pointer in %r1,
61    // saved program counter in %srr0) and stack conventions (saved stack
62    // pointer at 0(%r1), return address at 8(0(%r1)).
63    virtual StackFrame* GetContextFrame();
64    virtual StackFrame* GetCallerFrame(const CallStack* stack,
65                                       bool stack_scan_allowed);
66  
67    // Stores the CPU context corresponding to the innermost stack frame to
68    // be returned by GetContextFrame.
69    const MDRawContextPPC64* context_;
70  };
71  
72  
73  }  // namespace google_breakpad
74  
75  
76  #endif  // PROCESSOR_STACKWALKER_PPC64_H__