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      1 // Copyright (c) 2013 Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 //     * Redistributions of source code must retain the above copyright
      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
     11 // copyright notice, this list of conditions and the following disclaimer
     12 // in the documentation and/or other materials provided with the
     13 // distribution.
     14 //     * Neither the name of Google Inc. nor the names of its
     15 // contributors may be used to endorse or promote products derived from
     16 // this software without specific prior written permission.
     17 //
     18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 // stackwalker_ppc64.h: ppc-specific stackwalker.
     31 //
     32 // Provides stack frames given ppc64 register context and a memory region
     33 // corresponding to a ppc64 stack.
     34 
     35 
     36 #ifndef PROCESSOR_STACKWALKER_PPC64_H__
     37 #define PROCESSOR_STACKWALKER_PPC64_H__
     38 
     39 
     40 #include "google_breakpad/common/breakpad_types.h"
     41 #include "google_breakpad/common/minidump_format.h"
     42 #include "google_breakpad/processor/stackwalker.h"
     43 
     44 namespace google_breakpad {
     45 
     46 class CodeModules;
     47 
     48 class StackwalkerPPC64 : public Stackwalker {
     49  public:
     50   // context is a ppc64 context object that gives access to ppc64-specific
     51   // register state corresponding to the innermost called frame to be
     52   // included in the stack.  The other arguments are passed directly through
     53   // to the base Stackwalker constructor.
     54   StackwalkerPPC64(const SystemInfo* system_info,
     55                    const MDRawContextPPC64* context,
     56                    MemoryRegion* memory,
     57                    const CodeModules* modules,
     58                    StackFrameSymbolizer* frame_symbolizer);
     59 
     60  private:
     61   // Implementation of Stackwalker, using ppc64 context (stack pointer in %r1,
     62   // saved program counter in %srr0) and stack conventions (saved stack
     63   // pointer at 0(%r1), return address at 8(0(%r1)).
     64   virtual StackFrame* GetContextFrame();
     65   virtual StackFrame* GetCallerFrame(const CallStack* stack,
     66                                      bool stack_scan_allowed);
     67 
     68   // Stores the CPU context corresponding to the innermost stack frame to
     69   // be returned by GetContextFrame.
     70   const MDRawContextPPC64* context_;
     71 };
     72 
     73 
     74 }  // namespace google_breakpad
     75 
     76 
     77 #endif  // PROCESSOR_STACKWALKER_PPC64_H__
     78