Re: Extboot Option ROM rewritten in C - v2

[Anthony Liguori <aliguori@us.ibm.com>]

Nguyen Anh Quynh wrote:
> Hi Anthony,
>
> I found a bug in the last code: send_command() failed to copy back the
> result into extboot_cmd structure. This patch fixes it.
>
> I succesfully tested this version with guest Win2K (fully updated,
> scsi boot) and Linux 2.6.25-rc8 (virtio).
>
> Let me know if you can boot Windows with this version.
>   

I'll test it out.  Please send it to the list as a patch against 
kvm-userspace.

Regards,

Anthony Liguori

> Thanks,
> Quynh
> ---
> This code is an attempt to rewrite the current extboot option rom in
> C. The new code now minimize the assembly code, so that the assembly
> code is very small and simple: boot.S's only job is to interface with
> C code, which does all the dirty job. "signrom" is modified to adapt
> with the new result binary image.
>
> The result option rom has the same size as the original one: 1.5KB,
> while the actual code size is around the same: 1.2KB (gcc can optimize
> really well)
>
> To install this option rom, do the following steps as root:
>
> make
> make save         <--- backup the original option rom to
> /usr/share/qemu/extboot.bin.org
> make install       <--- overwrite the new option rom to
> /usr/share/qemu/extboot.bin
>   


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