<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def function_call_action(self, text, loc, fun):

 """Code executed after recognising the whole function call"""

        exshared.setpos(loc, text)
        if DEBUG > 0:
            print("FUN_CALL:",fun)
            if DEBUG == 2: self.symtab.display()
            if DEBUG > 2: return
        #check number of arguments
        if len(self.function_arguments) != self.symtab.get_attribute(self.function_call_index):
            raise SemanticException("Wrong number of arguments for function '%s'" % fun.name)
        #arguments should be pushed to stack in reverse order
        self.function_arguments.reverse()
        self.codegen.function_call(self.function_call_index, self.function_arguments)
        self.codegen.restore_used_registers()
        return_type = self.symtab.get_type(self.function_call_index)
        #restore previous function call data
        self.function_call_index = self.function_call_stack.pop()
        self.function_arguments = self.function_arguments_stack.pop()
        register = self.codegen.take_register(return_type)
        #move result to a new free register, to allow the next function call
        self.codegen.move(self.codegen.take_function_register(return_type), register)
        return register