On Fri, Dec 08, 2023 at 07:35:25PM +0100, Florian Weimer wrote: > * Kees Cook: > > > I significantly prefer APIs not being arch-specific, so I'd prefer we > > always include AT_PAGE_SHIFT_MASK. For an architecture that doesn't > > define its own ARCH_AT_PAGE_SHIFT_MASK, it's not _inaccurate_ to report > > 1 << PAGE_SHIFT, but it might be incomplete. > > The downside is that as an application programmer, I have to go and > chase for the information the legacy way if I encounter > getauxval(AT_PAGE_SHIFT_MASK) == getpagesize() for a longer time > because the interface does not signal the absence of any extended > page sizes. Are there architectures besides x86 where AT_PAGE_SHIFT_MASK isn't a single bit? If so, let's get them added now along with x86. -- Kees Cook
