Aug. 11, 2011
2:53 p.m.
On Thu, Aug 11, 2011 at 18:18, jiangtao.jit <jiangtao.jit@gmail.com> wrote:
Hi all:
on booting of x86 top of file arch/x86/boot/pmjump.S there is code ------------------- GLOBAL(protected_mode_jump) movl %edx, %esi xorl %ebx, %ebx
i think it's zeroing bx (l--> low I suppose)
movw %cs, %bx
then, it should zero the content of cs. Quite likely, it means to jump to cpu ring level 0 and do something there.. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com