Re: [PATCH 0/3] x86_64 EFI runtime service support

Yinghai Lu
2007-08-22T07:20:27Z

On 8/21/07, Andi Kleen <ak@suse.de> wrote:
> > current LinuxBIOS's path: the elfboot in LinuxBIOS will prepare the
> > e820 table, and jump to startup_32 in kernel. is that not good and
> > simple?
>
> The problem is that the zero page cannot be changed at all in this
> setup. Or rather it can be only changed by breaking LinuxBios.

FYI.

current mkelfImage is using
#define REAL_MODE_DATA_LOC 0x20000
the %esi will be 0x20000

YH