[syslinux] chaing freebsd pxeboot.0 from pxelinux.0

[Gianpaolo Del Matto]

Hi Folks,

I have configured pxelinux.0 to allow chain-booting freebsd pxeboot.0 
from it like this:

label fbsdpxe
              KERNEL pxeboot.0

This works as expected, so no issue with that.

There's one weird thing however.
If I rename pxeboot.0 to pxeboot (omitting .0) and change the config 
file accordingly
it throws this error at me:

Invalid or corrupt kernel image.

Same happens if I rename it to 'pxeboot.1' or if I try to do the same 
with pxelinux.0
itself by renaming it to 'pxelinux', 'pxelinux.abc' or some other name.

This is interresting as obviously a stock linux kernel can be named 
anything.
This behaviour is only seen with pxe loaders.

While I've read the pxe specs which state the NBP may be split in two if 
greater than 32k
thus leading to the .0 and eventually .1 in NBP filenames the behaviour 
seen may be
absolutely intenional.

Can you confirm this, Peter?

Greetings

Gianpaolo