Linux内核中的函数调用程序 [英] Function caller in linux kernel

问题描述

有没有一种方法可以在Linux内核中获取函数调用者?我知道 __ func __ 返回正在执行的函数名称.我正在寻找名为" __ func __ "

Is there a way to get function caller in linux kernel? I know __func__ returns the function name which is executing. I am looking for the function which called "__func__"

推荐答案

您可以使用__builtin_return_address(0)来获得呼叫者.

You can get the caller with __builtin_return_address(0).

呼叫者的呼叫者是__builtin_return_address(1)，依此类推.

The caller's caller is __builtin_return_address(1) and so on.

这是GCC扩展，在gcc手册中有记录: http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html

It's a GCC extension, documented in the gcc manual: http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html

编辑:我可能应该指出，这可以为您提供呼叫者的地址.如果需要函数名称，可以使用%pS打印它，例如:

I should probably point out, that gets you the address of the caller. If you want the function name you can print it with %pS, eg:

printk("Caller is %pS\n", __builtin_return_address(0));

如果不想打印，可以使用kallsyms_lookup()等.

If you don't want to print it, you can use kallsyms_lookup() etc.

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