[syslinux] hdt error on syslinux 6.0.4-pre1?

[Ady]

> On 05.04.2016 01:18, Michael D. Setzer II via Syslinux wrote:
> 
> > This is in the BIOS mode. I changed all the syslinux files from the 6.0.3 to the 
> > 6.0.4 versions when available. (There are a few C32 files that are not 
> > there??). In Virtual Box, the EFI doesn't work at all, but booting in BIOS 
> > mode, the kernels all work as in 6.0.3 and all the C32 options work except 
> > hdt that gives this error?
> > 
> 
> Notice the OVMF's genesis - VirtualBox stable/current and QEMU
> 
> = VBox/OVMF =
> $ grep -i edk2 VirtualBox-5.0.16/src/VBox/Devices/EFI/Firmware/ReadMe.vbox
> EFI firmware based on the opensource EDK2 project.  The current base is
> revision 13361 from: https://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1
> 
> https://www.virtualbox.org/browser/vbox/trunk/src/VBox/Devices/EFI/Firmware/ReadMe.vbox#L5
> EFI firmware based on the opensource EDK2 project.  The current base is
> revision 18601 from: https://svn.code.sf.net/p/edk2/code/branches/UDK2014.SP1
> ...
> 
> = QEMU/OVMF =
> $ rpm -q edk2.git-ovmf-x64
> edk2.git-ovmf-x64-0-20160401.b1656.gde70b8c.noarch
> 
> https://github.com/tianocore/edk2/commit/de70b8c
> 
> 
> VBox stable  - OVMF 2010
>      current - OVMF 2014
> QEMU all     - OVMF 2016
> 
> 
 
 
The described behavior refers to BIOS, not UEFI.

hdt.c32 in BIOS firmware would / should be expected to work correctly 
even in older BIOS versions.

Whichever the case, I tend to have a different perspective about the 
behavior presented in VMs. Instead of immediately thinking that the VM 
software should be updated (which is a perfectly-valid point too), we 
should rather take its behavior as "it is probably happening in some 
real hardware too".

My (wild, UNeducated) assumption / guess: developers are testing 
hdt.c32 (just as other parts of Syslinux) mostly in network-booting 
scenarios, and much less (or not at all) tested / developed under other 
situations.

If Erwan doesn't show up, it would be beneficial if some other 
developer takes a look at HDT in the meantime.

Regards,
Ady. 


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