Re: booting grub, loading kernels and unloading kernels question

[Lubomir Kundrak]

> "adrian15" <address@hidden> writes:
>
>> Can we boot grub
>> and boot linux
>> so that
>> linux don't write on grub reserved memory (let's say first 640k)
>> And then make an special halt command
>> that halts linux and boots again grub? (without rebooting)

When we discussed thhis on IRC i expressed an idea of having grub in linux
kernel format. Then we could use kexec facility to return to grub. But it
would also need patching linux so that it doesnt't clobber BIOS memory.
NetBSD takes care not to do so afaik, so if kloader worked on i386 thhis
could be another option.

>
> GRUB depends on the BIOS to function.  I think linux changes the
> hardware state too much.  So even if you can return to GRUB, I don't
> think the hardware state is reliable enough for GRUB or the BIOS to
> function reliably and properly, if it is possible at all.

Hardware state? What hardware is in question, except disks?

>> Currently I want an easy way of showing an image with a lot of colours
>> in
>> grub without having to code vesa and all of that. (Talking about grub
>> legacy, as always ;) )
>
> No.
>
>> If this works... I will need to know how to patch the kernel and how to
>> strip gnu/linux distro to have only the display command or equivalent to
>> show images in framebuffer or equivalent.
>
> Sorry, but I don't think it works like you hoped it would.
>
> --
> Marco
>
>
>
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>


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  o        Lubomir Kundrak
 °O°        <address@hidden>, http://skosi.org/~lkundrak/
 (_)        SKOSI -- Slovak OpenSource Initiative
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