On Thursday, 7 of February 2008, matthieu castet wrote: > Hi, > > > Pavel Machek wrote: > > Hi! > > So I assume it is some kind of desktop? > Yes. > > >> > >> ...if someone calls start as 0x1234:0, we are okay. But if some broken > >> bios calls us as 0x1:0x234, we've got a problem. > > > > Well, in that case the signature/end_signature tests below would > >trigger, no? > > Yes, and for example the beep flag won't work. > > > > > Not sure what is going on... but if you remove all the stack > > references, does it go up to 32-bit mode? > Yes, but I end up with a kernel panic after console resume and some > resume stuff. > > > Looks like ss goes bonkers or the 32-bit opcodes are invalid in real > mode. > > Matthieu, can you try "pushw %ax; popw %ax;", please? > I still crash. > I also try to set ss to 0, and hardcode the stack (knowing we are loaded > at 0x1000). And it crash. > > > I wonder if there a way to check that we are realy in real mode ? Yes. In real mode bit 0 of the cr0 register should be 0. Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
