Re: [PATCH v2] arm64: vdso: Fix ABI regression in compat vdso

John Stultz
2019-07-10T15:44:57Z

On Wed, Jul 10, 2019 at 7:01 AM Vincenzo Frascino
<vincenzo.frascino@arm.com> wrote:
>
> Prior to the introduction of Unified vDSO support and compat layer for
> vDSO on arm64, AT_SYSINFO_EHDR was not defined for compat tasks.
> In the current implementation, AT_SYSINFO_EHDR is defined even if the
> compat vdso layer is not built and this causes a regression in the
> expected behavior of the ABI.
>
> Restore the ABI behavior making sure that AT_SYSINFO_EHDR for compat
> tasks is defined only when CONFIG_COMPAT_VDSO is enabled.
>
> Reported-by: John Stultz <john.stultz@linaro.org>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

This seems to solve it for me!
Thanks so much for the quick turnaround on a fix. I really appreciate it!

Tested-by: John Stultz <john.stultz@linaro.org>

thanks
-john