export symbols

Alberich de megres alberich2k5@gmail.com
Sun Aug 2 15:03:00 GMT 2009


No one have tried to implement modules on his apps? Or know how to do it?

thanks once again,.. and sorry to insist, but i'm lost here :(


On Tue, Jul 28, 2009 at 9:30 PM, Alberich de
megres<alberich2k5@gmail.com> wrote:
> I know it's been a long since i first send my question.. but i'm still stucked.
> Versioning symbols does not add them to dynsym table.
>
> Maybe i explained myself in the wrong way:
>
> - I got host program P, with its functions and i want only one to be
> seen by modules (function F).
>
> - In the other side i got a program M (module), that is loaded by P
> and then it uses the F function from P.
>
> If i compile with -rdynamic option in gcc, it works fine but it
> exports all the functions on .dynsym.
>
> Using versioning, and adding this on my code:
>
> __asm__(".symver F,  F@");
>
> Only adds F@ to .symtab, but not to .dynsym. So when executing the
> program i get the following message:
>
> ./main: symbol lookup error: ../mod/log: undefined symbol: F
>
>
> And i tried to  --dynamic-list option.. but with no results.
>
> Any idea or tip??
>
> Thanks!!
>
>
>
> On Sat, Apr 25, 2009 at 11:15 PM, Andi Hellmund<mail@andihellmund.com> wrote:
>> Ian Lance Taylor wrote:
>>> Alberich de megres <alberich2k5@gmail.com> writes:
>>>
>>>
>>>> but i just want to export some of symbol on main.c. Is it some way to
>>>> control which symbols i export?
>>>>
>>>
>>> http://sourceware.org/binutils/docs-2.19/ld/VERSION.html
>>>
>>> Ian
>>>
>>>
>> Beside the versioning of symbols, you could also use use one of the
>> following ld commands (check out the man page for more details):
>>
>> --exclude-symbols symbol,symbol,...
>>
>> --dynamic-list=dynamic-list-file
>>
>> If you are using gcc for linking, then prepend -Wl, to the command, like
>> -Wl,--exclude-symbols,...
>>
>> Hope that helps and best regards,
>> Andi
>>
>>
>



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