[syslinux] PXE boot img for both BIOS and EFI

[Gene Cumm]

On Wed, Dec 12, 2018 at 6:30 PM Joakim Tjernlund via Syslinux
<syslinux at zytor.com> wrote:
>
> On Wed, 2018-12-12 at 17:10 -0600, Carl Karsten wrote:
> > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
> >
> >
> > On Wed, Dec 12, 2018 at 4:54 PM Joakim Tjernlund
> > <Joakim.Tjernlund at infinera.com> wrote:
> >
> > > While I am here, I want to ask:
> > > Is there a way to create a combined PXE boot img for both BIOS and EFI ?
> > > Currently one have to use 2 different images.
> >
> > I'm a little fuzzy what you mean here.
>
> Can you have one pxelinux.0 which will work for both UEFI resp. BIOS PXE ?

BIOS PXE always enters execution at the first byte. UEFI uses a PE32+
image format.  The PE32 header starts with the string "MZ" which
doesn't bode well for this idea.

-- 
-Gene