hotspot/src/cpu/x86/vm/registerMap_x86.hpp

/*
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#ifndef CPU_X86_VM_REGISTERMAP_X86_HPP
#define CPU_X86_VM_REGISTERMAP_X86_HPP

// machine-dependent implemention for register maps
  friend class frame;

 private:
  // This is the hook for finding a register in an "well-known" location,
  // such as a register block of a predetermined format.
  // Since there is none, we just return NULL.
  // See registerMap_sparc.hpp for an example of grabbing registers
  // from register save areas of a standard layout.
   address pd_location(VMReg reg) const {return NULL;}

  // no PD state to clear or copy:
  void pd_clear() {}
  void pd_initialize() {}
  void pd_initialize_from(const RegisterMap* map) {}

#endif // CPU_X86_VM_REGISTERMAP_X86_HPP