Peter Maydell wrote: > On 19 September 2012 14:32, Jamie Lokier <ja...@shareable.org> wrote: > > However, someone may run QEMU on a kernel before 2.6.32, which isn't > > that old. (E.g. my phone is running 2.6.28). > > NB that ARM kernels that old have other amusing bugs, such > as not saving the floating point registers when invoking > signal handlers.
Hi Peter, It's not that old (< 3 years). Granted that's not a nice one, but I'm under the impression it occurs only when the signal handler uses (VFP hardware) floating point. I.e. most programs don't do that, they keep the signal handlers simple (probably including QEMU). (I've read about other platforms that have similar issues using floating point in signal handlers; best avoided.) Anyway, people are running those kernels, someone will try to run QEMU on it unless... > I would be happy for QEMU to just say "your kernel is too old!"... I'd be quite happy with that as well, if you want to put a check in and refuse to run (like Glibc does). Less happy with obscure, rare failures of atomicity that are practically undebuggable, and easily fixed. Cheers, -- Jamie
