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

[H.J. Lu]

On Mon, Dec 9, 2013 at 2:01 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> 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.)
>

Kernel can consider PIE with non-zero vaddr isn't real PIE.

-- 
H.J.
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