Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Patrick Georgi]

Hi,

third installment in my mini-series - the fourth one vanished on the way.

Move segment table to the beginning of the ELF image, so it can be used 
while parsing the rest. There was some patch for this on this list 
already (http://www.mail-archive.com/grub-devel@gnu.org/msg03547.html), 
which might help as inspiration.


Regards,
Patrick Georgi

Re: Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Pavel Roskin]

Hello!

On Sat, 2008-01-12 at 18:02 +0000, Patrick Georgi wrote:
> Hi,
> 
> third installment in my mini-series - the fourth one vanished on the way.
> 
> Move segment table to the beginning of the ELF image, so it can be used 
> while parsing the rest. There was some patch for this on this list 
> already (http://www.mail-archive.com/grub-devel@gnu.org/msg03547.html), 
> which might help as inspiration.

Maybe you meant to attach a patch?

I'd be interested to try changes to grub-mkimage on PowerPC.

-- 
Regards,
Pavel Roskin

Re: Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Robert Millan]

On Sat, Jan 12, 2008 at 06:02:10PM +0000, Patrick Georgi wrote:
> Hi,
> 
> third installment in my mini-series - the fourth one vanished on the way.
> 
> Move segment table to the beginning of the ELF image, so it can be used 
> while parsing the rest.

I have two concerns before investing time in this:

  - I heard CoreBoot was deprecating ELF for size reasons.

  - On an earlier discussion (about boot issues on Apple hardware), Pavel
    proposed switching util/elf/grub-mkimage.c to use libbfd.  This would
    solve a few problems automaticaly, including this one.

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call, if you are unable to speak?
(as seen on /.)

Re: Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Patrick Georgi]

Am Tue, 15 Jan 2008 19:09:19 +0100 schrieb Robert Millan:
>   - I heard CoreBoot was deprecating ELF for size reasons.
Version 3 splits them up, yes. Version 2 will keep ELF.
 
>   - On an earlier discussion (about boot issues on Apple hardware),
>   Pavel
>     proposed switching util/elf/grub-mkimage.c to use libbfd.  This
>     would solve a few problems automaticaly, including this one.
I'm fine with whatever path is taken to solve it (or if you decide that 
it's not worth the effort, and require coreboot v3). There's a patch out 
there for anyone who needs this kind of setup, after all.

And if that libbfd-change fixes this issue, all the better.


Regards,
Patrick Georgi

Re: Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Robert Millan]

On Tue, Jan 15, 2008 at 06:42:20PM +0000, Patrick Georgi wrote:
> Am Tue, 15 Jan 2008 19:09:19 +0100 schrieb Robert Millan:
> >   - I heard CoreBoot was deprecating ELF for size reasons.
> Version 3 splits them up, yes. Version 2 will keep ELF.

What do you mean "splits" ?  Is ELF supported as a build option?

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call… if you are unable to speak?
(as seen on /.)

Re: Using GRUB2 with CoreBoot (formerly known as LinuxBIOS) 3/3: grub-mkimage should create streamable ELFs

[Patrick Georgi]

Am Wed, 16 Jan 2008 14:47:38 +0100 schrieb Robert Millan:
> What do you mean "splits" ?  Is ELF supported as a build option?
You give it an ELF file and it adds per-segment files to the LAR image. 
Mostly transparent to the user.


Regards,
Patrick Georgi