Re: [Qemu-devel] [PATCH 3/4] Multiboot support v2

[Avi Kivity]

On 06/17/2009 07:41 PM, Alexander Graf wrote:
> This patch implements support for Multiboot on x86 for -kernel.
> Multiboot is a "new" approach to get rid of different bootloaders, providing
> a unified interface for the kernel. It supports command line options and
> kernel modules.
>
> The two probably best known projects using multiboot are Xen and GNU Hurd.
>
> This implementation should be mostly feature-complete. It is missing VBE
> extensions, but as no system uses them currently it does not really hurt.
>
> To use multiboot, specify the kernel as -kernel option. Modules should be given
> as -initrd options, seperated by a comma (,). -append also works.
>
> Please bear in mind that grub also does gzip decompression, which qemu does
> not do yet. To run existing images, please ungzip them first.
>
> The guest multiboot loader code is implemented as option rom using int 19.
> Parts of the work are based on efforts by Rene Rebe, who originally ported
> my code to int 19.
>    

This will be very useful for running test cases.

> +    /* Ok, let's see if it is a multiboot image.
> +       The header is 12x32bit long, so the latest entry may be 8192 - 48. */
> +    for(i = 0; i<  (8192 - 48); i += 4) {
>    

Here (and in many other places in the patch) you have a control flow 
keyword followed immediately by a parentheses, so it looks like a 
function call.  Really reduced readability IMO.

--
error compiling committee.c: too many arguments to function