Resolving ambiguous external symbol references in Loadable Kernel Modules ( LKM )

Asked Dec 05 '19 at 12:15

Active Dec 05 '19 at 12:28

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Lets suppose there are two loaded kernel modules that have exported two different functions as identically named symbols. For example:
MyFn in MyLKM1.ko
MyFn in MyLKM2.ko

How does a third kernel module ( e.g. MyLKM3.ko ) disambiguate between these two external symbols when it wants to import the 'MyFn` symbol in order to do its code relocation when it gets loaded?

P.S. I am not looking for instructions how to build kernel modules. I am looking for a description of the mechanism for ambiguous external symbol resolution in LKMs as ELF files.

edited Dec 05 '19 at 12:28

asked Dec 05 '19 at 12:15

George Robinson

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There is only one definition of each symbol. See depmod. – stark Dec 05 '19 at 12:42
If it is impossible to export two symbols with the same name, then it answers my question. Unfortunately I have no answer to accept :( – George Robinson Dec 05 '19 at 12:59

Resolving ambiguous external symbol references in Loadable Kernel Modules ( LKM )

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