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References: <1235833386-30272-1-git-send-email-agraf@suse.de>
Date: Sat, 28 Feb 2009 17:30:35 +0200
Message-ID: <f43fc5580902280730o47bc2286gef0e4245d24f03eb@mail.gmail.com>
Subject: Re: [Qemu-devel] [PATCH] Make the ELF loader aware of backwards
	compatibility
From: Blue Swirl <blauwirbel@gmail.com>
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To: qemu-devel@nongnu.org
Cc: Alexander Graf <alex@csgraf.de>

On 2/28/09, Alexander Graf <agraf@suse.de> wrote:
> Most 64 bit architectures I'm aware of support running 32 bit code
>  of the same architecture as well.

For Sparc64 this is only true for userland, kernel level code is not
compatible at all. Sparc64 kernel can run Sparc64 and Sparc32
binaries, but a Sparc32 kernel will crash on Sparc64.

>   /* Load a 32 bit BIOS also on 64 bit machines */
>  -#if defined (TARGET_PPC64) && defined(CONFIG_USER_ONLY)
>  +#if defined (TARGET_PPC64)
>   #define ELF_MACHINE     EM_PPC64
>   #else
>   #define ELF_MACHINE     EM_PPC

The comment should be removed with the hack.