docs: def call(self, callsite_addr, addr, retn_target=None, stack_pointer=None):
          """
          Push a stack frame into the call stack. This method is called when calling a function in CFG recovery.
  
          :param int callsite_addr: Address of the call site
          :param int addr: Address of the call target
          :param int or None retn_target: Address of the return target
          :param int stack_pointer: Value of the stack pointer
          :return: None
          """
  
          frame = CallStack(call_site_addr=callsite_addr, func_addr=addr, ret_addr=retn_target,
                            stack_ptr=stack_pointer)
          return self.push(frame)