[Qemu-devel] Re: [OpenBIOS] QEMU OpenBIOS booting?

[Laurent Vivier <Laurent@lvivier.info>]

Le dimanche 19 avril 2009 à 11:59 -0700, Steven Noonan a écrit :
> On Sun, Apr 19, 2009 at 1:24 AM, Laurent Vivier <Laurent@lvivier.info> wrote:
> > Le dimanche 19 avril 2009 à 00:50 -0700, Steven Noonan a écrit :
> >> On Tue, Apr 14, 2009 at 10:46 PM, Steven Noonan <steven@uplinklabs.net> wrote:
> >> > On Sun, Apr 12, 2009 at 1:39 AM, Laurent Vivier <Laurent@lvivier.info> wrote:
> >> >> OpenBIOS is not able to boot MacOS X.
> >> >
> >> > Well, that's a silly limitation. Is there a reason this isn't
> >> > implemented? I see that the Mac-on-Linux OpenBIOS version has such
> >> > support, so it seems strange that the QEMU version does not.
> >>
> >> I don't know if anyone here is actually interested (this list seems
> >> -very- quiet), but...
> >
> > Hi,
> >
> >> I've been hacking at OpenBIOS for a bit, and I got it to properly read
> >> Mac OS X discs (it kept failing because it would hit an Apple
> >> Partition Map header instead of an HFS+ filesystem header). I'm
> >> working on adding an XCOFF loader, too, so it should be able to boot
> >> Mac OS X soon.
> >
> > You can copy it from OpenHackWare.
> > I made some tests and it seems to have some memory conflicts between
> > MacOS kernel and OpenBIOS.

In fact what I have is a Mach-O loader which load mach_kernel from "/".

> > Good Luck.
> >
> 
> Two more pre-XCOFF loader commits up:
> http://github.com/tycho/openbios/commit/e43daa3447b5ce4a2b05b2f32882e49891156200
> http://github.com/tycho/openbios/commit/7023b78a10f5632fd08d4749615efd3e73ab1036

Seems good but do you really need to check for embedded XCOFF in this
patch and are you really able to execute the boot-script ?

In Panther Install CD, BootX is:

<CHRP-BOOT>
<COMPATIBLE>
MacRISC MacRISC3 MacRISC4
</COMPATIBLE>
<DESCRIPTION>
Boot Loader for Mac OS X.
</DESCRIPTION>
<OS-BADGE-ICONS>
</OS-BADGE-ICONS>
<BOOT-SCRIPT>
...
<BOOT-SCRIPT>
load-base
begin
 dup 6 " &lt;/CHRP" $= if
  6 + dup 6 " -BOOT&gt;" $= if
   8 + true
  else
   false
  then
 else
  1+ false
 then
until
( xcoff-base )
load-size over load-base - -
( xcoff-base xcoff-size )
load-base swap move
init-program go
</BOOT-SCRIPT>
</CHRP-BOOT>
[...XCOFF HERE]


Regards,
Laurent