Syslinux - Nov 2013 - [Arch] syslinux 6.02 patch test result

Started a new thread as the old one is huge, which doesn't play well with
gmail.

Justed tested the patch by Gerardo:
http://www.syslinux.org/archives/2013-November/021190.html

Boot failed. Error message was:


*Failed to load ldlinux.c32*
*Boot failed: press a key to retry*

@ Gerardo: Only just saw the request on the forum...

Carl

Hi,

Carl Duff:
> http://www.syslinux.org/archives/2013-November/021190.html
> Boot failed. Error message was:
> *Failed to load ldlinux.c32*
So Gerardo's fix was successful.

It should be possible to transplant the fixed isolinux.bin
into other ISOLINUX 6.02 bootable images, which boot further
than just to the expected failure to find ldlinux.c32.

After the following steps, the resultng arch_repacked.iso
boots for me to menu and root prompt:

  # mount -o loop test-isolinux-6.02.patched.iso /mnt

  $ cp /mnt/isolinux/isolinux.bin /tmp/isolinux.bin

  # umount /mnt
  # mount -o loop archlinux-2013.11.01-dual.iso /mnt

  $ xorriso -as mkisofs \
      -o arch_repacked.iso \
      -c isolinux/boot.cat \
      -b isolinux/isolinux.bin \
         -no-emul-boot -boot-load-size 4 -boot-info-table \
      -V "ARCH_201311" \
      -iso-level 2 \
      --sort-weight -1 /isolinux/isolinux.bin \
      -graft-points \
      /mnt \
      /isolinux/isolinux.bin=/tmp/isolinux.bin

  $ rm /tmp/isolinux.bin

--sort-weight -1 brings the boot image to the highest possible
block address .i.e into the dangerous area.

The files /isolinux/isolinux.bin of test-isolinux-6.02.patched.iso
and arch_repacked.iso should then only differ by bytes 12 to 15,
where the block address in the ISO image is recorded.
(I see quite some diff towards the original isolinux.bin of
 archlinux-2013.11.01-dual.iso.)


Have a nice day :)

Thomas