Modules.Symvers - What is (not) and how to use it?

Modules.Symvers - What is (not) and how to use it?

[Ismael Farfán]

Hello guys

I work on 3 modules, let's say:
KServervices, mod1, mod2

KServices exports functions consumed by mod1 and mod2.

Accidentally I was deleting Modules.Symvers after compiling KServices
and mod1 and mod2 failed to load because thery where looking for the
functions in a different offset than the one shown in /proc/kallsyms


QUESTION:
What is and how do I use that file?


I was hopping to find some good documentation in tldp.org, but
nothing, I only find forums that mention it, but nothing that can help
me understand it and probably find a way to stop requiring it.

Regards
Farfan



-- 
Do not let me induce you to satisfy my curiosity, from an expectation,
that I shall gratify yours. What I may judge proper to conceal, does
not concern myself alone.

Re: Modules.Symvers - What is (not) and how to use it?

[Randy Dunlap]

On 04/08/2014 09:55 AM, Ismael Farfán wrote:
> Hello guys
> 
> I work on 3 modules, let's say:
> KServervices, mod1, mod2
> 
> KServices exports functions consumed by mod1 and mod2.
> 
> Accidentally I was deleting Modules.Symvers after compiling KServices
> and mod1 and mod2 failed to load because thery where looking for the
> functions in a different offset than the one shown in /proc/kallsyms
> 
> 
> QUESTION:
> What is and how do I use that file?
> 
> 
> I was hopping to find some good documentation in tldp.org, but
> nothing, I only find forums that mention it, but nothing that can help
> me understand it and probably find a way to stop requiring it.

There is a small bit of documentation for it in
kernel tree:Documentation/kbuild/modules.txt.


-- 
~Randy