On Mon, Feb 01, 2021 at 07:11:12PM -0500, Keno Fischer wrote: > Hi Andrei, > > > This series introduces the PTRACE_O_ARM64_RAW_REGS option. If it is set, > > PTRACE_GETREGSET returns values of all registers, and PTRACE_SETREGSET > > allows to change any of them. > > thanks for picking this up. I meant to work on this, but unfortunately ran out > of time to be able to push it through, so I'm glad you're working on > it, since it > does absolutely need to get fixed. Besides this issue, the other problem we > ran into when trying to port our ptracer to aarch64 is that orig_x0 is not > accessible through the ptrace interface on aarch64, which can cause tricky > behavior around restarts. Could you describe the problem in more details? I wonder whether we have the same thing in CRIU... > We managed to work around that in the end, > but it's painful. If we're fixing the kernel here anyway, I'm wondering if > we might want to address that as well while we're at it. Sure let think how to do this properly. In this case, I think the ptrace option isn't a good choise. I don't think that it is a good idea to change the layout of regset depending on options... Thanks, Andrei > > Keno
