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Re: [Xen-devel] Re: [PATCH] xen: Disable stack protector for irq helper

On Mon, Oct 05, 2009 at 10:21:01AM -0700, Jeremy Fitzhardinge wrote:
> > Save all caller-saved registers on x86_32 for the paravirt callee saved
> > registers.
> That looks better, but it is still overkill.  We only need to save the
> set of registers the ABI requires the callee to preserve.  What
> additional register(s) gets clobbered by stack-protector that need to be
> saved?

Well, exactly the two, ecx and edx. eax is still clobbered by the return
value. Anyway, it works in praxis.


Superior ability breeds superior ambition.
                -- Spock, "Space Seed", stardate 3141.9

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