Re: [PATCH] binfmt_elf: fix PIE load with randomization disabled

From: H. Peter Anvin
Date: Mon Dec 09 2013 - 17:02:19 EST


On 12/09/2013 01:59 PM, H.J. Lu wrote:
>
> A Linux/x86-64 user came to me at the end of 2008. He needed
> to load an executable above 4GB. I added -Ttext-segment option
> to linker:
>
> https://sourceware.org/ml/binutils/2009-01/msg00173.html
>
> so that he could load his program compiled as PIE above 4GB.
> If kernel is changed not to honor it, his program won't work any more.
> In normal case, PIE has zero vaddr and this doesn't apply.
>

That doesn't seem to be PIE at all, and if it is PIE, then it should be
relocatable (I agree btw with randomizing upward from the selected address.)

-hpa

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