32-bit jail on 64-bit host

[Peter Blok]

Chris, that was the right hint.

I copied host /rescue/route to the jail in /amd64. Changed the dhclient-script to use /amd64/route and it worked.

Using dynamic linked version failed with /libexec/ld-elf.so.1.

Peter


> On 22 Apr 2021, at 21:27, Chris <bsd-lists at BSDforge.com> wrote:
> 
> On 2021-04-22 11:13, Peter Blok wrote:
>> I tried to replace some of the 32-bit binaries before, but it started to require
>> shared libs as well, so I stopped. I’ll give it a shot later.
> I'm not sure which binaries you might need either. But could /rescue bring you
> any closer?
> 
> --Chris
>> I now run it with out vnet and it indeed works. I have managed to compile
>> p5-DBD-Oracle which works now.
>> Because all of my other jails were vnet jails, I didn’t think about doing it the
>> old way without vnet.
>> Peter
>>> On 22 Apr 2021, at 15:39, Ian Lepore <ian at freebsd.org> wrote:
>>> On Thu, 2021-04-22 at 12:32 +0200, Daniel Dettlaff via freebsd-hackers
>>> wrote:
>>>> If you need to run 32bit software with 64bit base system just try
>>>> creating 64bit jail with lib32 subsystem present. Then 32bit software
>>>> should be able to run properly in such jail, but you can't run 32bit
>>>> jail on 64bit base as Eugene said.
>>> That is not what Eugene said, and you CAN run a 32-bit jail on a 64-bit
>>> host; I do so on this machine.  As Eugene said, you simply need to copy
>>> a few selected 64-bit binaries into the jail, replacing the 32-bit
>>> version of those programs.  That is, install the jail from a 32-bit
>>> build or packages, and then just copy the necessary few binaries from
>>> your host root filesystem into the jail.
>>> It would be nice if there was a list somewhere of which binaries need
>>> to be replaced.  I just did it by trial and error... when I ran into
>>> things that didn't work, I tried using a 64-bit copy of that program
>>> and if it worked: problem solved.
>>> -- Ian
>>>>> On 22 Apr 2021, at 10:36, Peter Blok <pblok at bsd4all.org> wrote:
>>>>> Hi,
>>>>> I have created a 32-bit jail on a 64-bit running 12-STABLE. The
>>>>> jail is also build using the same source.
>>>>> The jail gives me a 32-bit environment. I’m getting an IP address
>>>>> and I can ping others on the same network segment.
>>>>> But I can’t set a default route.
>>>>> route add default 192.168.1.1
>>>>> route: writing to routing socket: Invalid argument
>>>>> add net default: gateway 192.168.1.1 fib 0: Invalid argument
>>>>> # netstat -rn
>>>>> Routing tables
>>>>> (0) (0) UH
>>>>> (0) (0) U
>>>>> (0) (0) UHS
>>>>> (0) (0) UH
>>>>> (0) (0) U
>>>>> (0) (0) UHS
>>>>> # ifconfig -a
>>>>> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>>>>> 	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
>>>>> 	inet6 ::1 prefixlen 128
>>>>> 	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
>>>>> 	inet 127.0.0.1 netmask 0xff000000
>>>>> 	groups: lo
>>>>> 	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>>>>> e0b_websip: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
>>>>> metric 0 mtu 1500
>>>>> 	options=8<VLAN_MTU>
>>>>> 	ether 0e:88:d7:20:99:80
>>>>> 	hwaddr 02:80:ad:6e:79:0b
>>>>> 	inet 192.168.1.205 netmask 0xffffff00 broadcast 192.168.1.255
>>>>> 	groups: epair
>>>>> 	media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
>>>>> 	status: active
>>>>> 	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>>>>> Any idea how to fix this?
>>>>> I’m using vnet bridge
>>>>> Peter
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