Re: [Qemu-devel] Fiber switching and stack protection

[Kevin Wolf]

Am 06.04.2012 12:38, schrieb Pavel Dovgaluk:
> Hello.
> 
>  
> 
> Recently I tried to build qemu-1.0 with MinGW and start it with qcow
> file created with previous version of qemu.
> 
> But after starting guest Windows loading process qemu had closed because
> of an exception.
> 
>  
> 
> I figured out that this exception is “stack smashing” and it happened in
> qemu_coroutine_switch of coroutine-win32.c file.
> 
> But when I remove -fstack-protector-all option from makefile nothing
> changes – an exception occurs again.
> 
>  
> 
> Does anyone have an idea about such behavior?

I guess it's this non-thread-local TLS once again, basically a compiler bug.

Paolo, wasn't there a compiler option that works around the problem?

Kevin