Jui-Nan Lin's Blog » amd64 http://en.jnlin.org My Mumuring in English, about Un*x, FreeBSD, Network in Taiwan Sat, 07 Nov 2009 03:42:11 +0000 en hourly 1 http://wordpress.org/?v=3.0 FreeBSD: i386 inside a jail in amd64 http://en.jnlin.org/2008/06/07/12/ http://en.jnlin.org/2008/06/07/12/#comments Sat, 07 Jun 2008 04:35:33 +0000 jnlin http://en.jnlin.org/2008/06/07/12/ The key point: make a symlink of jailed /libexec/ld-elf.so.1 to /libexec/ld-elf32.so.1. Of course, your kernel should have COMPAT_IA32 option compiled.

# cd /usr/src && make TARGET_ARCH=i386 TARGET=i386 buildworld
# mkdir -p /home/jails/i386 && make TARGET_ARCH=i386 TARGET=i386 DESTDIR=/home/jails/i386 installworld
# make TARGET_ARCH=i386 TARGET=i386 DESTDIR=/home/jails/i386 distribution
# ln -s /home/jails/i386/libexec/ld-elf.so.1 /home/jails/i386/libexec/ld-elf32.so.1

Then, edit rc.conf in jail to run sshd and start jails. Some utilities, like w/ps/top can not run because they retrieve data from FreeBSD kernel, and the kernel returns 64-bit structures, not 32-bit.

w
4:37AM  up 12 days,  8:40, 1 user, load averages: 0.03, 0.18, 0.20
USER             TTY      FROM              LOGIN@  IDLE WHAT
w: kinfo_proc size mismatch (expected 768, got 1088): No such file or directory

I am doing further test to make sure there aren’t any mines :)

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