On Fri, Jul 25, 2025 at 04:13:27PM +0000, Sami Tolvanen wrote:
> On Thu, Jul 24, 2025 at 04:37:03PM -0700, Deepak Gupta wrote:

> > If shadow stack have memory protections from underlying cpu, use those
> > protections. arches can define PAGE_KERNEL_SHADOWSTACK to vmalloc such shadow
> > stack pages. Hw assisted shadow stack pages grow downwards like regular
> > stack. Clang based software shadow call stack grows low to high address.

> Is this the case for all the current hardware shadow stack
> implementations? If not, we might want a separate config for the
> shadow stack direction instead.

It's true for arm64.