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

From: Andreas Färber
Subject: Re: [Qemu-devel] Signal management in qemu-user
Date: Thu, 17 May 2012 15:33:50 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120421 Thunderbird/12.0

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:

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.


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