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Message-ID: <49880077.6000006@exactcode.de>
Date: Tue, 03 Feb 2009 09:29:43 +0100
From: Rene Rebe <rene@exactcode.de>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH] Add multi-boot kernel loading support
References: <49873680.2040603@exactcode.de> <498776EC.1050208@codemonkey.ws>
	<D84C730F-64D3-48FA-A467-256583B9803C@suse.de>
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To: Alexander Graf <agraf@suse.de>
Cc: qemu-devel@nongnu.org

Alexander Graf wrote:
>=20
> On 02.02.2009, at 23:42, Anthony Liguori wrote:
>=20
>> Rene Rebe wrote:
>>> Hi all,
>>>
>>> Alexander Graf implemented multi-boot kernel loading during
>>> his work to run Darwin inside Qemu/KVM. As the boot loader
>>> expects to load the kernel in an EFI environment a custom
>>> booter is used to load the kernel using a legacy BIOS.
>>>
>>> This is a port of the patch to the new extload / INT 19
>>> machinery (including minor cleanups).
>>>
>>> Signed-off-by: Ren=E9 Rebe <rene@exactcode.de>
>>>
>>> Index: elf_ops.h
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>> --- elf_ops.h    (revision 6501)
>>> +++ elf_ops.h    (working copy)
>>> @@ -195,6 +195,10 @@
>>>     }
>>>
>>>     if (ELF_MACHINE !=3D ehdr.e_machine)
>>> +#if (ELF_MACHINE =3D=3D EM_X86_64) && !defined(CONFIG_USER_ONLY)
>>> +      /* x86_64 systems can run i386 code as well */
>>> +      if(ehdr.e_machine !=3D EM_386)
>>> +#endif
>>>         goto fail;
>>>
>>>     if (pentry)
>>
>> Seems like an unrelated fix.
>=20
> Actually it's not. If you want to load a 32-bit elf (multiboot)=20
> executable on an x86_64 system, you need this patch.

Thanks, I was just about to re-reply to the other mail with this
question lost while answering.

--=20
   Ren=E9 Rebe - ExactCODE GmbH - Europe, Germany, Berlin
   http://exactcode.de | http://t2-project.org | http://rene.rebe.name