Re: [PATCH 0/9] x86 EFI boot stub

From: Matt Fleming
Date: Thu Aug 11 2011 - 11:14:44 EST

On Thu, 2011-08-11 at 15:05 +0200, Maarten Lankhorst wrote:
> On 08/11/2011 12:59 PM, Matt Fleming wrote:
> > From: Matt Fleming <matt.fleming@xxxxxxxxx>
> >
> > This series adds support for an EFI boot stub, similar to the existing
> > BIOS boot stub. The result is that you can boot a bzImage on an EFI
> > machine without the use of a boot loader by making the bzImage appear
> > to the EFI firmware to be an EFI application. Also, a single bzImage
> > can be booted on either a BIOS or EFI machine.
> >
> > Using the EFI boot stub has the advantage that the kernel is
> > responsible for configuring the machine to the point where we can
> > fully boot the kernel, so we are no longer at the mercy of the boot
> > loader.
> >
> Fails to boot here. I thought changing characteristics from 0x60500020 to 0xe0500020 would help, but no. :/
> This change would make the code section writable.

Thanks for testing out the patches Maarten!

> FileAlignment you use is probably wrong, I think it should be 0x200 not 0x2000 .

Yep, thanks. That looks like a typo.

> Maybe you need to add a data section and fix SizeOfInitializedData too?

Hmm.. possibly. Is this on x86-64?

> It just hangs on a blinking cursor, no idea if it actually started executing anything yet or not, since nothing is printed out.

Hmm.. do you have early printk enabled? Can you hook up a serial console
to this machine?

Matt Fleming, Intel Open Source Technology Center

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