On Wed, Nov 21, 2012 at 12:00 PM, Vivek Goyal <vgoyal at redhat.com> wrote: > On Wed, Nov 21, 2012 at 11:50:56AM -0800, Yinghai Lu wrote: > > [..] >> > So how do I force a 16bit or 32bit entry using a bzImage64? >> >> kexec -t bzImage -l .... >> will load low and use 32bit entry. >> > > Ok, so user needs to enforce image type (using -t option) to bzImage > (for a bzImage which supports 64bit entry point) to be able to use > 32bit entry. > > I think a better option is that bzImage64 loader parses the user specified > entry options and call into 32bit bzImage loader if user is asking for 32bit > or 16bit entry. For 16bit, we already have option --real-mode option. May > be we need to introduce another one for forcing 32bit entry, say --entry-32bit > or --protected-mode (whatever makes sense). that is doable. add checking entry-32bit and real-mode checking in kexec-bzImage64.c and bail early to leave kexec-bzImage.c to take over.
