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 // Copyright (c) 2010 Google Inc.

 // All rights reserved.

 //

 // Redistribution and use in source and binary forms, with or without

 // modification, are permitted provided that the following conditions are

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 //

 //     * Redistributions of source code must retain the above copyright

 // notice, this list of conditions and the following disclaimer.

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 // in the documentation and/or other materials provided with the

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 // this software without specific prior written permission.

 //

 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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 // stackwalker_ppc.h: ppc-specific stackwalker.

 //

 // Provides stack frames given ppc register context and a memory region

 // corresponding to a ppc stack.

 //

 // Author: Mark Mentovai

 #ifndef PROCESSOR_STACKWALKER_PPC_H__

 #define PROCESSOR_STACKWALKER_PPC_H__

 #include "google_breakpad/common/breakpad_types.h"

 #include "google_breakpad/common/minidump_format.h"

 #include "google_breakpad/processor/stackwalker.h"

 namespace google_breakpad {

 class CodeModules;

 class StackwalkerPPC : public Stackwalker {

  public:

   // context is a ppc context object that gives access to ppc-specific

   // register state corresponding to the innermost called frame to be

   // included in the stack.  The other arguments are passed directly through

   // to the base Stackwalker constructor.

   StackwalkerPPC(const SystemInfo* system_info,

                  const MDRawContextPPC* context,

                  MemoryRegion* memory,

                  const CodeModules* modules,

                  StackFrameSymbolizer* frame_symbolizer);

  private:

   // Implementation of Stackwalker, using ppc context (stack pointer in %r1,

   // saved program counter in %srr0) and stack conventions (saved stack

   // pointer at 0(%r1), return address at 8(0(%r1)).

   virtual StackFrame* GetContextFrame();

   virtual StackFrame* GetCallerFrame(const CallStack* stack,

                                      bool stack_scan_allowed);

   // Stores the CPU context corresponding to the innermost stack frame to

   // be returned by GetContextFrame.

   const MDRawContextPPC* context_;

 };

 }  // namespace google_breakpad

 #endif  // PROCESSOR_STACKWALKER_PPC_H__