Date: Tue, 30 Sep 2008 23:35:37 +0200 From: Olivier Smedts <olivier@gid0.org> To: Mel <fbsd.questions@rachie.is-a-geek.net> Cc: questions@freebsd.org Subject: Re: chrooting in a 32-bit world from a 64-bit kernel+world Message-ID: <20080930213536.GA24601@q.gid0.org> In-Reply-To: <200809302238.10566.fbsd.questions@rachie.is-a-geek.net> References: <20080930184401.GA23783@q.gid0.org> <200809302128.40212.fbsd.questions@rachie.is-a-geek.net> <20080930195721.GA24099@q.gid0.org> <200809302238.10566.fbsd.questions@rachie.is-a-geek.net>
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On Tue, Sep 30, 2008 at 10:38:10PM +0200, Mel wrote:
> On Tuesday 30 September 2008 21:57:22 Olivier Smedts wrote:
> > On Tue, Sep 30, 2008 at 09:28:39PM +0200, Mel wrote:
> > > On Tuesday 30 September 2008 20:44:02 Olivier Smedts wrote:
> > > > So far I've got a working FreeBSD (kernel+world) in a 512MB image I can
> > > > dump on a CompactFlash card :
> > > > # cd /usr/src
> > > > # make buildworld TARGET=i386
> > > > # make buildkernel TARGET=i386
> > > > # mount /dev/md0a /mnt
> > > > (md0 is a 512MB file backed image I bsdlabel'd and newfs'd before)
> > > > # make installworld TARGET=i386 DESTDIR=/mnt
> > > > # make distribution TARGET=i386 DESTDIR=/mnt
> > > > # make installkernel TARGET=i386 DESTDIR=/mnt
> > > >
> > > > The problem is that I can't chroot in this 32-bit world.
> > > > Say I want to install the sysutils/screen port in /mnt :
> > > >
> > > > # mkdir /mnt/usr/ports
> > > > # mount -t nullfs /usr/ports /mnt/usr/ports
> > > > # mount -t devfs devfs /mnt/dev
> > >
> > > It's a guess, but at this point:
> > > chroot /mnt /etc/rc.d/ldconfig start
> >
> > First, thank you for replying so fast !
> >
> > /etc/rc.d/ldconfig is a /bin/sh script, and I can't run /bin/sh in this
> > chroot. Same errors.
> >
> > > If that don't work:
> > > /sbin/ldconfig -32 -s -f /mnt/var/run/ld-elf.so.hints /mnt/lib \
> > > /mnt/usr/lib
> >
> > After that command, the shared libraries are found, but ld refers to /mnt :
> > # ldconfig -rf /mnt/var/run/ld-elf.so.hints
> > /mnt/var/run/ld-elf.so.hints:
> > search directories: /mnt/lib:/mnt/usr/lib
> > 0:-lc.7 => /mnt/lib/libc.so.7
> > 1:-lcrypt.4 => /mnt/lib/libcrypt.so.4
> > [...]
>
> Right.
> cd /mnt
> rmdir mnt
> ln -s . mnt
>
> The old chroot symlink hack.
>
> > And then when trying to chroot, still the same problem. I also can't launch
> > ldconfig in the jail :
> > # chroot /mnt/ /sbin/ldconfig -32 -s -f /var/run/ld-elf.so.hints /lib
> > /usr/lib ELF interpreter /libexec/ld-elf.so.1 not found
> > Abandon
>
> If you have /rescue there, maybe chroot /mnt /rescue/ldconfig /lib /usr/lib
> will help you. I'm pretty sure it's the missing hints causing this.
>
> If all this fails, I'd try running /mnt as a jail.
Thanks for the advices. At least statically compiled binaries in /rescue work.
# chroot /mnt /rescue/sh
# /rescue/ldconfig /lib /usr/lib
# /rescue/ldconfig -r
/var/run/ld-elf.so.hints:
search directories: /lib:/usr/lib
0:-lc.7 => /lib/libc.so.7
1:-lcrypt.4 => /lib/libcrypt.so.4
[...]
# sh
ELF interpreter /libexec/ld-elf.so.1 not found
Abort trap
#
No luck with the symlink hack or a jail :
Configuring jails:.
Starting jails:ELF interpreter /libexec/ld-elf.so.1 not found
cannot start jail "fanless":
Abort trap
.
I'll try to boot directly in the 32-bit world with my 64-bit kernel.
I think it should work. In that case, there's maybe something to configure
in the amd64 host's ldconfig or ld-elf.so.1 before chrooting in a 32-bit world.
> --
> Mel
>
> Problem with today's modular software: they start with the modules
> and never get to the software part.
--
Olivier Smedts _
ASCII ribbon campaign ( )
e-mail: olivier@gid0.org - against HTML email & vCards X
www: http://www.gid0.org - against proprietary attachments / \
"Il y a seulement 10 sortes de gens dans le monde :
ceux qui comprennent le binaire,
et ceux qui ne le comprennent pas."
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