Re: suspend to ram problem

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Wednesday, 6 of February 2008, Pavel Machek wrote:
> Hi!
> 
> >>>>>> instead of existing stack setup. That helped on one of my test-boxes
> >>>>> Thanks, I will try that.
> >>>>> Because clearing the flags imply pop/push in the stack it could be the 
> >>>>> problem
> >>>> That doesn't help : it still crash in pushl $0.
> >>>>
> >>> All stack stuff in wakeup_code crash for me.
> >>> I tried to change the stack position, make sure upper bit of %esp are 
> >>> clear, ... nothing work.
> >>> What's are strange is that according to my x86 manual, in real mode the 
> >>> failure can only happen if the stack wrap which is not the case here.
> >>> Any x86 guru advice ?
> >>>
> >>> If I remove stack access (remove clearing flag stuff, not call to video 
> >>> stuff) the resume works.
> >>
> >> Hm, can you place a "pushl %eax; popl %eax;" in place of the removed code and
> >> see if that breaks?
> > Yes that also break.

Interesting.

> Not sure what is going on...

Looks like ss goes bonkers or the 32-bit opcodes are invalid in real mode.

Matthieu, can you try "pushw %ax; popw %ax;", please?

Rafael