Outside the chroot:
livecd ~ # mount
tmpfs on / type tmpfs (rw)
/dev/cdroms/cdrom0 on /mnt/cdrom type iso9660 (ro)
/dev/loop/0 on /mnt/livecd type squashfs (ro)
proc on /proc type proc (rw,nodiratime)
sysfs on /sys type sysfs (rw)
udev on /dev type tmpfs (rw,nosuid)
devpts on /dev/pts type devpts (rw)
cachedir on /mnt/livecd/lib/splash/cache type tmpfs (rw)
tmpfs on /lib/firmware type tmpfs (rw)
tmpfs on /usr/portage type tmpfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/hda2 on /mnt/gentoo type ext3 (rw)
none on /mnt/gentoo/proc type proc (rw)

Inside the chroot:
livecd / # mount
rootfs on / type rootfs (rw)
tmpfs on /newroot type tmpfs (rw)
/dev/cdroms/cdrom0 on /newroot/mnt/cdrom type iso9660 (ro)
/dev/loop/0 on /newroot/mnt/livecd type squashfs (ro)
proc on /newroot/proc type proc (rw,nodiratime)
sysfs on /newroot/sys type sysfs (rw)
udev on /newroot/dev type tmpfs (rw,nosuid)
devpts on /newroot/dev/pts type devpts (rw)
tmpfs on /newroot/mnt/livecd/lib/firmware type tmpfs (rw)
tmpfs on /newroot/mnt/livecd/usr/portage type tmpfs (rw)
usbfs on /newroot/proc/bus/usb type usbfs (rw)
/dev/hda2 on / type ext3 (rw)
none on /proc type proc (rw,nodiratime)