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Re: 2nd Linux kernel patch to remove stack exec
From: borchert () MATHEMATIK UNI-ULM DE (Andreas Borchert)
Date: Mon, 14 Apr 1997 09:12:31 +0200


Bryan Reece <reece () TAZ NCEYE NET> wrote:

Wouldn't it be a better idea to patch crt0 and the function entry and
exit code to generate a magic cookie a word or so long at startup,
write this cookie just below the return address on entry, and test it
before returning, dying horribly if it's not correct anymore?

No -- this is far too expensive. The other proposal has the advantage
of not slowing down all applications and of not requiring recompilation.

Andreas.

--
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Andreas Borchert, Universitaet Ulm, SAI, Helmholtzstr. 18, 89069 Ulm,  Germany

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