// Copyright 2013 Google LLC
//
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// 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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// stackwalker_ppc64.h: ppc-specific stackwalker.
//
// Provides stack frames given ppc64 register context and a memory region
// corresponding to a ppc64 stack.


#ifndef PROCESSOR_STACKWALKER_PPC64_H__
#define PROCESSOR_STACKWALKER_PPC64_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 StackwalkerPPC64 : public Stackwalker {
 public:
  // context is a ppc64 context object that gives access to ppc64-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.
  StackwalkerPPC64(const SystemInfo* system_info,
                   const MDRawContextPPC64* context,
                   MemoryRegion* memory,
                   const CodeModules* modules,
                   StackFrameSymbolizer* frame_symbolizer);

 private:
  // Implementation of Stackwalker, using ppc64 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 MDRawContextPPC64* context_;
};


}  // namespace google_breakpad


#endif  // PROCESSOR_STACKWALKER_PPC64_H__