在哪里可以找到Linux全局mem_map数组的地址? [英] Where can I find the address of the Linux global mem_map array?

问题描述

我的发行版(Ubuntu 14.04.3 LTS)似乎没有导出此引用，因此我无法在模块加载时解析地址.我正在寻找另一种无需重新编译内核即可确定地址的方法.

My distro (Ubuntu 14.04.3 LTS) doesn't seem to export this reference so I can't resolve the address at module load time. I'm looking for another way to determine the address without a kernel re-compile.

我正在Macbook Pro上以VMware Fusion的身份来宾运行.内核是3.13.0-74通用的.

I'm running as a guest under VMware Fusion on a macbook pro. Kernel is 3.13.0-74-generic.

预先感谢

推荐答案

使用kallsyms_lookup_name.在linux/kallsyms.h中定义为

unsigned long kallsyms_lookup_name(const char *name);

用法很简单:

struct page *my_mem_map = (struct page*)kallsyms_lookup_name("mem_map");

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从内核2.6.33开始，为模块导出

kallsyms_lookup_name.

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kallsyms_lookup_name is exported for modules since kernel 2.6.33.

对于较早的内核，或一次发现多个符号，可以使用通用函数kallsyms_on_each_symbol.迭代所有符号并为它们调用用户指定的函数.

For earlier kernels, or for find several symbols at once, generic function kallsyms_on_each_symbol can be used. It iterates over all symbols and calls user-specified function for them.

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