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Re: Whacky ia64: linux_proc_xfer_partial and lseek vs pread64


Daniel Jacobowitz <drow@false.org> writes:

> Fascinating.  That definitely seems like a kernel bug to me; why not?

The vDSO page is quite special, since it is only executable, but not
readable.

> I see some magic bits in the kernel ptrace support to read backing
> stores, which are obviously going to get fouled up by pread support.
> But I don't see anything that would affect the vDSO.

That's problably the effect of ptrace overriding page protections.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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