[syslinux] Booting FreeBSD

[Geert Stappers]

Op 2013-07-31 om 21:06 schreef Daniel O'Connor:
> Hi,
> I am trying to create a hybrid ISO image for FreeBSD
> 9.2 using syslinux 6.01 and isohybrid.pl I found at
> http://www.overclockix.com/sources/isohybrid.pl (I know there is a
> C version in syslinux but I haven't been able to build it yet due to
> the UUID library being different to the one in FreeBSD).
> 
> According to the wiki mboot.c32 can boot FreeBSD, however I haven't
> been able to get it working. I have the following..
> root op build92:~ # ll /tmp/iso/isolinux/
> total 356
> -r--r--r--  1 root  wheel    1185 Jul 31 01:55 cdboot.bin
> -rw-r--r--  1 root  wheel   38912 Jul 31 08:17 isolinux.bin
> -rw-r--r--  1 root  wheel      78 Jul 31 11:34 isolinux.cfg
> -rwxr-xr-x  1 root  wheel  115472 Jul 31 01:39 ldlinux.c32*
> -rwxr-xr-x  1 root  wheel  182520 Jul 31 08:17 libcom32.c32*
> -rwxr-xr-x  1 root  wheel   10056 Jul 31 08:12 mboot.c32*
> 
> And syslinux.cfg contains..
> DEFAULT FreeBSD
> LABEL FreeBSD
>   KERNEL mboot.c32
>   APPEND /boot/kernel/kernel
> 
> I create the ISO with..
> mkisofs -JR -o /tmp/test.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -V FREEBSD_INSTALL /usr/obj/usr/src/release/bootonly /tmp/iso/
> 
> (/usr/obj/usr/src/release/bootonly is created by make release in FreeBSD)
> 
> Syslinux loads & runs fine (indeed I can use it to run cdboot.bin and
> that actually runs FreeBSD if I am on a CD but it does not grok HD
> booting) however mboot does not like /boot/kernel/kernel. I get..
> "Invalid Multiboot image: neither ELF header nor a.out kludge found"
> 
> I also tried running the loader (/boot/loader) but I get the same message.
> 
> I am not really sure how I go about getting more debugging information
> so any ideas gratefully received :)

(-:  Then here an idea disguished in questions:

What kind (what type) of filesystem is /boot in?
Is that type filesystem known to Syslinux?


> I am pretty sure I could fall back to using memdisk (I have used it to
> boot FreeBSD from syslinux in the past) but it makes the build process
> more complex (and this way is neater :)

AFAIK is memdisk filesystem type VFAT


Groeten
Geert Stappers
-- 
Leven en laten leven