code: def initialize_segment_register_x64(self, state, concrete_target):
          
          _l.debug("Synchronizing gs segment register")
          state.regs.gs = self._read_gs_register_x64(concrete_target)
docs: Set the gs register in the angr to the value of the fs register in the concrete process
  
          :param state:               state which will be modified
          :param concrete_target:     concrete target that will be used to read the fs register
          :return: None