Re: RELRO and Xorg

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.
-- 
dr Tóth Attila, Radiológus, 06-20-825-8057
Attila Toth MD, Radiologist, +36-20-825-8057