Re: RELRO and Xorg

2013.Október 25.(P) 15:18 időpontban Alexander Tsoy ezt írta:
> В Wed, 2 Oct 2013 22:58:35 +0200
> "Tóth Attila" <[email protected]> пишет:
>
>> 2013.Október 2.(Sze) 21:07 időpontban Magnus Granberg ezt írta:
>> > onsdag 02 oktober 2013 20.41.32 skrev  Alex Efros:
>> >> Hi!
>> >>
>> >> On Tue, Oct 01, 2013 at 09:21:00PM +0200, Hinnerk van Bruinehsen
>> wrote:
>> >> > > I can test proprietary nvidia if someone provide me with modified
>> >> ebuild
>> >> > > or patch or instructions what's to do.
>> >> >
>> >> > If you want to try, you could try the xorg-2.eclass from here:
>> >> I've tried both rebuilding only xorg-server first, restart X, then
>> >> rebuilde all x11-drivers/* packages and reboot (to reload kernel
>> >> module) - in both cases everything works fine with proprietary
>> nvidia.
>> >>
>> >> I've also tried nouveau and nv drivers, but got "Failed to load …
>> >> undefined symbol: …" errors (with different symbols for each driver).
>> >> Maybe this happens because some other libs should be recompiled, or
>> >> because of already loaded nvidia kernel module.
>> >
>> > When i tred nouveau and the radeaon driver i needed to define the load
>> > order of
>> > the drivers modules else i did get undefined symbols. On radeon i
>> could
>> > not
>> > even load some of the needed modules. But all this was some long time
>> ago.
>> > /Magnus
>> >
>> Aha!
>>
>> As a last step I also compiled radeon with full relro. And Xorg fails to
>> load.
>> The error message says:
>> Failed to load /usr/lib64/xorg/modules/drivers/radeon_drv.so:
>> /usr/lib64/xorg/modules/drivers/radeon_drv.so: undefined symbol:
>> exaWaitSync
>>
>> So radeon still needs lazy. But Xorg and other drivers are RELRO now.
>> I have to say the first load of X takes a bit longer than usuall - makes
>> sense because of the BIND_NOW...
>>
>> How I can define the load order of the modules?
>> I may play around with it. A bit more false sense of security! :-)
>>
>> Thx: Dw.
>
> Same problem with glamor. See comment 1 for an example of how to
> define the load order of modules.
>
> https://bugs.gentoo.org/show_bug.cgi?id=488906

Ahh, so this is the problem with glamor.
I've already figured out the way how to specify module loading order.
However I couldn't solve the radeon driver load problem with full relro.
My efforts weren't enough. Although I haven't considered fb module. So
I'll give it another try. And also retest glamor.

Thanks:
Dwokfur
-- 
dr Tóth Attila, Radiológus, 06-20-825-8057
Attila Toth MD, Radiologist, +36-20-825-8057