RFC: Add GNU_PROPERTY_NEED_PHDRS

[H.J. Lu]

On Fri, Sep 28, 2018 at 7:30 AM, Rich Felker <dalias@libc.org> wrote:
> On Fri, Sep 28, 2018 at 06:42:52AM -0700, H.J. Lu wrote:
>
>> Dynamic loader has no problem.  The problem is kernel passes
>> AT_PHDR to main, which points to the unmmaped address.   We can
>> ask for kernel change or make kernel happy.
>
> Kernel change does not help because nobody is obligated to use a new
> kernel. Binutils would be producing binaries that don't work on
> existing kernels (if the note hack were reverted or if similar changes
> were added to other archs without a note hack; right now of course
> it's working again).

True.

>> My current .note.gnu.property patch only works for x86.   We can
>> add
>>
>> #define GNU_PROPERTY_PHDRS 3
>>
>> so that it can be used for all targets.
>
> What would this do?
>

These are what I have in mind.


-- 
H.J.
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