What's the value of %cs before jump in pm32 on booting?

[Mulyadi Santosa]

On Thu, Aug 11, 2011 at 18:18, jiangtao.jit <jiangtao.jit at 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

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