Re: [devel] Fwd: lj_udrepper: Text Relocations

["Dmitry V. Levin" <ldv@altlinux.org>]

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On Tue, Jun 06, 2006 at 07:29:21PM +0400, Alexey Tourbin wrote:
> textrelocs.html -- довольно интересный текст.
> 
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> 
> Text Relocations at 03-06-2006 17:50:03
> http://udrepper.livejournal.com/10666.html
>    People treated creating DSOs with text relocations so far cavalier
>    offense. The runtime automatically works around the problems the
>    programmers are responsible for and the costs and risks are not
>    immediately visible unless one thinks about the issue.
> 
>    This changed with the SELinux memory protection bits which are enabled
>    in FC5 and later. Text relocations are a fatal flaw of a DSO or PIE
>    and must be avoided. Since people complain that it's hard to fix the
>    problem I've written code and wrote a little article on [0] how to fix
>    them.
> 
>    For completeness I should mention that it is possible to label DSOs so
>    that the kernel allows text relocations.

А в некоторых ядрах эту сомнительную возможность можно отключать частично
или совсем.


-- 
ldv

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