[syslinux] syslinux mkisofs hard-disk-boot isohybrid

[Pascal]

2016-12-23 13:56 GMT+01:00 Ady Ady via Syslinux <syslinux at zytor.com>:

>
> > Hi,
> >
> > Ady wrote:
> > > the UEFI specs do state that the ESP is supposed
> > > to be set/used as no-emulation mode
> > > ...
> > > the UEFI specs should tolerate / accept this situation, rather than
> > < restricting the ESP to no-emulation mode.
> >
> > My criticism towards this UEFI implementation is that it probably cannot
> > serve as realistic test bed for the first stage of UEFI booting. It seems
> > far too tolerant towards standards deviations.
>
>
> At this time I'd rather focus on syslinux.efi not being able to boot
> optical media in UEFI mode by means of the no-emulation method as
> described in the UEFI specs, instead of taking Pascal's case (and its
> resulting qemu's behavior) as base for testing other UEFI
> implementations.
>

as syslinux.efi can not give the hand to the kernel located outside the
image, I left this side to put everything in the image (vmlinux, initrd &
syslinux.efi), but it stuck on isohybrid at the bios level now...


>
>
> >
> > in previous post, Ady wrote:
> > > Is there anyone that is willing to add more options and alternatives
> > > to isohybrid [...] ?
> >
> > That's not easy.
>
> There is no developer that has attempted to answer the question of
> booting optical media in UEFI mode using syslinux.efi, in spite of
> years of being asked in this Syslinux mailing list, again and again.
>

if everything is in the image, syslinux.efi can boot a linux kernel that
will do the rest... at my level, with hard disk emulation, the problem lies
in making the image iso bootable as a disk (eg. isohybrid).


>
> Let's first see syslinux.efi booting (virtual) optical media in UEFI
> mode using the so-called "efiboot.img" (super)floppy image as El Torito
> no-emulation, just as any other UEFI bootloader that claims to do so
> (and actually does). Only then, we can discuss whether there is a need
> for isohybrid changes, or whatever else might be needed / convenient.
>
> @Peter?
>
> Regards,
> Ady.
>
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