Re: Move loader.c out of the kernel

[phcoder]

Yoshinori K. Okuji wrote:
> On Sunday 22 March 2009 22:30:24 phcoder wrote:
> > Yoshinori K. Okuji wrote:
> > > On Sunday 22 March 2009 22:06:36 phcoder wrote:
> > > > Yoshinori K. Okuji wrote:
> > > > > On Sunday 22 March 2009 21:48:21 phcoder wrote:
> > > > > > Hello. Now when boot command isn't in kernel anymore I don't see why
> > > > > > loader.c stays in kernel. Here is the patch to move it to boot.mod
> > > > > This is not useful in reality, because the loader interface needs to be
> > > > > pre-loaded into core.img anyway.
> > > > Why? I successfully tested core.img with just pc fat and biosdisk
> > > > modules integrated. It loads boot.mod just fine and boots linux and
> > > > multiboot with no problem
> > > Try the rescue mode with no extra module loaded. If the core.img does not
> > > have any loader, it is useless.
> > If it's unable to read FS then it can't boot much anyway. If it's it can
> > load modules from its own partition. The only use I see is when grub
> > partition is corrupted but OS one is intact and you already have FS
> > driver for root in grub2.
> > Alternatively commands/boot.c can be a part of minicmd
>
> "cannot load any more module" != "cannot read the filesystem"
>
> The most typical case is where the user has failed in installing GRUB 
> correctly; in this case, the user can still reset the prefix, and load 
> normal.mod manually. But, surprisingly, some users accidentally remove 
> modules. Indeed, I have heard many times this kind of "bug reports" in GRUB 
> Legacy. In this case, the only way is to boot an OS somehow and re-install 
> GRUB.

Well if user damages grub2 then we can't do much. He can also accidently 
 rewrite mbr or first track (some non-booting-realted software does it 
on purpose). For failsafe solution only cd is a viable alternative
grub-install already handles the correct installation of grub2. 
Additionally if user has "accidently" deleted modules chances are he 
used grub-install or some wrapper around it. But grub-install doesn't 
put any loader modules to core.img.

> Regards,
> Okuji
>
>
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--

Regards
Vladimir 'phcoder' Serbinenko