On Thu, Aug 15, 2024 at 04:29:54PM +0100, Mark Brown wrote: > On Thu, Aug 15, 2024 at 04:11:56PM +0100, Dave Martin wrote: > > On Thu, Aug 15, 2024 at 03:45:45PM +0100, Mark Brown wrote: > > > On Thu, Aug 15, 2024 at 02:37:22PM +0100, Dave Martin wrote: > > > > > Is there a test for taking and returning from a signal on an alternate > > > > (main) stack, when a shadow stack is in use? Sounds like something > > > > that would be good to check if not. > > > > Not specifically for any of the architectures. > > > Can you see any reason why this shouldn't work? > > No, it's expected to work - I'm just not specifically aware of an > explicit test for it. Possibly some of the userspace bringup work > might've covered it? Any libc tests for altstack support should've > exercised it for example. That's true; if libc is built to use shadow stack, generic API tests ought to cover this. > > Maybe I'll hacking up a test if I get around to it, but don't take this > > as a promise! > > Thanks for your firm commitment! :P No problem... Cheers ---Dave
