Syslinux - May 2018 - UEFI support for chain.c32 in 6.04 syslinux

Hi Folks ,

Can you please let me know if there is any fix for chain loading  UEFI boot
loader using chain.c32  in 6.04 release ?
I am booting my system with syslinux.efi and want to chain load to windows or
sex specific boot loader in the second stage  .

Thanks
Robin

Hi Folks ,

Can you please let me know if there is any fix for chain loading  UEFI boot
loader using chain.c32  in 6.04 release ?
I am booting my system with syslinux.efi and want to chain load to windows or
sex specific boot loader in the second stage  .

Thanks
Robin

On Thu, Dec 15, 2016 at 2:59 PM, Robin Mathews (robimath) via Syslinux
<syslinux at zytor.com> wrote:
> Hi Folks ,
>
> Can you please let me know if there is any fix for chain loading  UEFI boot
loader using chain.c32  in 6.04 release ?
> I am booting my system with syslinux.efi and want to chain load to windows
or sex specific boot loader in the second stage  .
chain.c32 has a lot of BIOS-isms and probably isn't worth modifying.
I believe none of the chain.c32 options apply to a (U)EFI environment.

There is a patch I'm reviewing for a new module to chainload (U)EFI
but it needs a lot of style cleanup. The chainloading of (U)EFI
binaries should be a lot closer to how linux.c32 works though might in
the future contain (U)EFI-specific options.  See
EFI_BOOT_SERVICES.LoadImage().

-- 
-Gene

On Fri, Dec 23, 2016 at 08:43:04AM -0500, Gene Cumm via Syslinux
wrote:
> On Thu, Dec 15, 2016 at 2:59 PM, Robin Mathews (robimath) via Syslinux
> <syslinux at zytor.com> wrote:
> > Hi Folks ,
> >
> > Can you please let me know if there is any fix for chain loading  UEFI
boot loader using chain.c32  in 6.04 release ?
> > I am booting my system with syslinux.efi and want to chain load to
windows or sex specific boot loader in the second stage  .
> 
> chain.c32 has a lot of BIOS-isms and probably isn't worth modifying.
> I believe none of the chain.c32 options apply to a (U)EFI environment.
> 
> There is a patch I'm reviewing for a new module to chainload (U)EFI
> but it needs a lot of style cleanup.
FWIW: Is the submitter of the patch aware that the patch is being reviewed?

> The chainloading of (U)EFI
> binaries should be a lot closer to how linux.c32 works though might in
> the future contain (U)EFI-specific options.  See
> EFI_BOOT_SERVICES.LoadImage().

Wishing you a nice chrismas/midwinterfest
Geert Stappers
-- 
Leven en laten leven

On Fri, 2016-12-23 at 08:43 -0500, Gene Cumm via Syslinux
wrote:
> On Thu, Dec 15, 2016 at 2:59 PM, Robin Mathews (robimath) via
> Syslinux
> <syslinux at zytor.com> wrote:
> > 
> > Hi Folks ,
> > 
> > Can you please let me know if there is any fix for chain
> > loading??UEFI boot loader using chain.c32??in 6.04 release ?
> > I am booting my system with syslinux.efi and want to chain load to
> > windows or sex specific boot loader in the second stage??.
> chain.c32 has a lot of BIOS-isms and probably isn't worth modifying.
> I believe none of the chain.c32 options apply to a (U)EFI
> environment.
> 
> There is a patch I'm reviewing for a new module to chainload (U)EFI
> but it needs a lot of style cleanup. The chainloading of (U)EFI
> binaries should be a lot closer to how linux.c32 works though might
> in
> the future contain (U)EFI-specific options.??See
> EFI_BOOT_SERVICES.LoadImage().
Did anything ever come of this? I'm about to be under some pressure to
upgrade our aging PXE boot menu system to support UEFI, and as you
might imagine, we currently rely quite heavily on chainloading (there
are currently at least 38 invocations of pxechain.cbt, and yes, I'm
still using that :-)).

-- Jeff