Re: Loading modules with an embedded config file seems to fail

[Andrei Borzenkov <arvidjaar@gmail.com>]

08.10.2015 20:28, Colin Close пишет:
> Thanks for your prompt reply, is this likely to change or is it dictated by thge 32k size limit?

Code that goes into core.img should be kept as small as possible. In 
your case using grub-mkrescue and placing grub.cfg there would be easier.


> Best,
> Colin Close
>
> On Thursday 08 Oct 2015 17:15:27 Andrei Borzenkov wrote:
>> On Thu, Oct 8, 2015 at 4:55 PM, Colin Close <itchka@compuserve.com> wrote:
>>> I have created an embedded image like this:-
>>> chroot "$CHROOTNAME" /usr/bin/grub2-mkimage -d "$GRUB_LIB" -O i386-pc -o "$GRUB_IMG" -p /boot/grub \-c /ISO/boot/grub/start_cfg  iso9660 biosdisk test
>>> cat "$CHROOTNAME"/"$GRUB_LIB"/boot.img "$CHROOTNAME"/"$GRUB_IMG" > "$ISOROOTNAME"/boot/grub/grub2-embed_img
>>> cat "$CHROOTNAME"/"$GRUB_LIB"/cdboot.img "$CHROOTNAME"/"$GRUB_IMG" > "$ISOROOTNAME"/boot/grub/grub2-eltorito.img
>>>
>>> and used the following options with xorriso to build an iso image
>>>
>>> XORRISO_OPTIONS1=" -b boot/grub/grub2-eltorito.img -no-emul-boot -boot-info-table --embedded-boot $ISOROOTNAME/boot/grub/grub2-embed_img --protective-msdos-label"
>>>
>>> The embedded image contain this start_cfg file
>>>
>>> if [ "${grub_platform}" == "efi" ]; then

This is defined by normal.mod which is not loaded at this point.

>>> search --no-floppy --set=root --fs-uuid '%GRUB_UUID%'
>>> set prefix=($root)/boot/grub
>>> set efi=1
>>> source ($root)/boot/grub/grub.cfg

That won't work using your command line anyway - you include neither 
search command not normal.mod.

>>> fi
>>> insmod part_apple
>>> insmod part_bsd
>>> insmod part_gpt
>>> insmod part_msdos

grub-mkrescue does it for you and is guaranteed to continue to work if 
these modules change.

>>> set bios=1
>>> set efi=0
>>> source ($root)/boot/grub/grub.cfg
>>>
>>> When I boot the iso in BIOS mode I get the following errors reported
>>> Unknown command ` if '
>>> Unknown command ` search '
>>> Unknown command ` source '
>>> Unknown command ` fi '
>>> Unknown command ` source '
>>>
>>
>> Embedded config is processed using rescue parser which does not
>> understand compound statements. This has been discussed just recently
>> on help-grub. The guy intended to open bug report for misleading
>> documentation but apparently never came around to do it.
>>
>>> Can anyone help me with this I have tried every possible strategy and nothing seems to work. Currently the config file is set up so it falls through to the bios boot and the flags get set right and things do work but obviously this is not ideal.
>>> Best,
>>> Colin Close
>>> OpenMandriva
>>>
>>> _______________________________________________
>>> Grub-devel mailing list
>>> Grub-devel@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/grub-devel
>>
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>
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