[PATCH v4 19/22] aarch64: Process gnu properties in static exe

[Yury Khrustalev]

On Tue, Dec 03, 2024 at 03:56:45PM -0300, Adhemerval Zanella Netto wrote:
> 
> 
> On 29/11/24 13:37, Yury Khrustalev wrote:
> > From: Szabolcs Nagy <szabolcs.nagy@arm.com>
> > 
> > Unlike for BTI, the kernel does not process GCS properties so update
> > GL(dl_aarch64_gcs) before the GCS status is set.
> 
> Although it would only used for aarch64, I think we should make this change
> generic as I suggested for memory sealing support [1].
> 
> [1] https://patchwork.sourceware.org/project/glibc/patch/20240930200831.1669010-3-adhemerval.zanella@linaro.org/

I can see some similatiry however in the case of GCS it's crucial to initialise
it as early as possible. In the patch [1] you referenced this setup would occur
after a number of function calls (as far as I can tell from the sources).

I agree that it makes sense to make this change generic eventually, but at this
point I don't see how to do it. I'd like to leave it AArch64 specific for now.

Thanks,
Yury