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). Eric will know better but I do think that bzImage64 loader should be able to parse user specified entry point and honor that. > kexec -t bzImage64 -l ... > kexec -l ... > will try to load high and use 64bit entry. This one violates the existing syntax where --real-mode is supposed to jump to real mode entry point of bzImage. Eric will know better but I do think that bzImage64 loader should be able to parse user specified entry point and honor that. Thanks Vivek
