2018/03/28

Linux Kernal Module Exported Symbol

How LKM A can call functions exported by LKM B? 

When LKM B is loaded, Exported symbols are registered to system symbol table in Linux kernel.
When LKM A is loaded,  system do binary search in system symbol table and other modules' symbol table to resolve symbols referenced by LKM A.







Reference
https://www.slideshare.net/shimosawa/nlkb20150221
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