On 08/19/2012 06:20 PM, Kevin O'Connor wrote: > On Sun, Aug 19, 2012 at 02:39:04PM +0300, Avi Kivity wrote: >> On 08/19/2012 12:27 PM, Avi Kivity wrote: >> > On 08/17/2012 08:53 AM, Gerd Hoffmann wrote: >> >> This looks suspious. vcpu migration issue? Or just something missing >> >> in the trace? >> > Looks like tracing with a too-small buffer size. I generally trace using >> > >> > trace-cmd record -e kvm -b 100000 >> > >> > and with fingers crossed. >> > >> > The RET FAR instruction failure (which trace-cmd report decodes) is >> > probably not the original failure. >> >> In fact it is, we mis-emulated stack operations when SS.B=0 but the >> address size was 32-bits, and there are bits set in the top 16 bits of ESP. >> >> Why ESP has bits set in the top 16 bits is another question. Is seabios >> polluting those bits? > > During the WinXP install/boot, when it makes 16bit calls it only > resets the lower bits of %esp. It expects the 16bit code to only use > %sp. Quite spectacularly, WinXP requires the top bits of %esp to not > be mangled by the 16bit code. > > SeaBIOS is very careful to not spuriously alter calling state. This > includes backing up the top bits of %esp and restoring them on return.
Okay, I'll try to track down where this came from. -- error compiling committee.c: too many arguments to function _______________________________________________ SeaBIOS mailing list [email protected] http://www.seabios.org/mailman/listinfo/seabios
