[syslinux] Chainload isohybrid image from extlinux

[H. Peter Anvin]

On 06/11/2011 05:12 PM, Emilio Lazo Zaia wrote:
> Hi,
> 
> I'm trying to boot Debian-Installer image from extlinux with chain.c32;
> i.e.:
> 
> - I'm doing this from a loopback device (loop0) which later will be
> dumped to an USB stick.
> - GPT disklabel.
> - Partition 15 (loop0p15) contains extlinux info, and partition 12
> contains Debian multi-arch installer image *dumped*[1], and its
> corresponding menu entry for extlinux is something like:
> 
> LABEL debian
> MENU LABEL Debian-Installer
> COM32 chain.c32
> APPEND hd0 12
> 
> Using qemu to boot off /dev/loop0, after selecting this option from extlinux's menu the message stored in isohybrid MBR is displayed: "isolinux.bin missing or
> corrupt", but booting from /dev/loop0p12 displays the Debian's splash screen and works.
> 
> I have found no way to chainload this isohybrid image from extlinux. There is a way to do that?
> 

You have to use the version of isohybrid that supports being loaded off
a partition.

	-hpa