Currently, yaboot is the ISO boot loader in fedora and the Fedora on
POWER team is making an effort in order to replace it by GRUB2 in the
F20 release cycle. I'm sending a lorax patch so you guys can comment
on it. I'm planning to create a feature page for that too.
This patch only change the lorax template for ppc and should not
affect other archs, like x86.
--
Paulo Flabiano Smorigo
Software Engineer
Linux Technology Center - IBM Systems & Technology Group
Using root= overrides the anaconda magic code for finding product.img
and updates.img. Anaconda can find the CDROM itself without needing
root=, though, so we can omit it safely for boot.iso.
If yaboot so much as catches a whiff of a backslash in yaboot.conf, it
will reject the entire file. No bootloader config means no booting.
So as long as we're still using yaboot on PPC, we need to use ISO volume
labels it can handle. So: filter the isolabel, replacing any non-ASCII
characters with underscores.
So there's actually two copies of yaboot on a PPC image, and they each
use different config files:
ppc/chrp/yaboot --> /etc/yaboot.conf
ppc/mac/yaboot --> /ppc/ppc{32,64}/yaboot.conf
So we need two copies of yaboot.conf - one in each place - to
boot properly (or all three if we're making hybrid images). Whee!
The comments should now make this more clear for future reference.
move arch-specific stuff to arch-specific subdirs and move all the
common stuff to a subdir named 'common'. Also, rename '.profile' and
'.bash_history' so you actually see them when you 'ls' the 'common' dir.
also added some helpful(?) comments to the templates.
New images find their root device by looking at the CDLABEL. Since pungi
is building ISO images separately from lorax, if it uses a different ISO
Volume Label we'll end up with unbootable images.
This changes the volume labels to match what pungi uses, so both should
boot OK.
Since pungi doesn't know that images/install.img needs to be moved to
LiveOS/squashfs.img for images to be "live", they aren't bootable.
This is the simple solution to the problem. Thanks to Karsten Hopp
for the original patch.
This adds the boot config files from anaconda to lorax's configdir.
They've been edited to include a '@ROOT@' placeholder, so lorax can put
the proper root=... argument in place, and to use the @VAR@ convention
everywhere (instead of some using @VAR@ and some using %VAR%).
This should probably fix EFI booting, since the EFI BOOT*.conf was
missing its root=... arg.
Also some default settings were changed in syslinux.cfg (so we don't
have to rewrite those two lines every time).
One last change - the '-magic' arg and ppc 'magic' file have been
dropped, because that's kind of silly and unnecessary.
TreeBuilder uses templates full of commands (like ramdisk.ltmpl) to
create the output tree and boot images. There are 4 arch-specific
templates, plus a bonus EFI template which can handle EFI image creation
for any arch that implements EFI.
David W. Aquilina
Paulo Flabiano Smorigo
Martin Gracik
Dennis Gilmore
Will Woods