Re: [Qemu-devel] Signal management in qemu-user

[Andreas Färber]

Am 17.05.2012 11:23, schrieb Alex Barcelo:
> Running it in a i386 machine works and gives an output of "0x0d\n0x20".
> Running it in a qemu-i386 segfaults. Because the self-modifying code
> raises a SIGSEGV in the qemu (I understand that it is the method used by
> qemu to handle self-modifying code). But the sigprocmask disables the
> SIGSEGV and the qemu-user... does nothing to avoid it. So the SIGSEGV is
> unmanaged and breaks the program.

Alex has the following SIGSEGV workaround queued for our openSUSE package:
http://repo.or.cz/w/qemu/agraf.git/commit/0760e24b52ff20a328f168ed23b52c9b9c0fd28f

Don't know if it fixes your specific problem. Peter had some ideas how
to refactor signal handling but iirc didn't have time to work on it himself.

Andreas

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