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Re: Fix hppa/ia64/microblaze executable stack default (bug 22156)
On Fri, 22 Sep 2017, John David Anglin wrote:
> On 2017-09-19, at 10:42 AM, Jeff Law wrote:
>
> > I don't think the PA was ever converted to the new bits from the Adacore
> > guys -- meaning I think it still generates executable stack trampolines
> > for nested functions.
>
> Yes.
We now have two different contradictory assertions about hppa, here and
<https://gcc.gnu.org/ml/gcc-patches/2017-09/msg01449.html>.
Can someone with hppa-linux hardware confirm what stack permissions the
kernel in fact starts processes with in the absence of GNU-stack markers
(Andreas's analysis indicates non-executable), what if any changes glibc
makes to those permissions after process creation, and whether trampolines
work in such a process? Testing whether my glibc patch changes the
answers to any of those questions would be a bonus.
--
Joseph S. Myers
joseph@codesourcery.com