compat4x broken in FreeBSD 8.1-RELEASE?

[Devin Teske]

On Tue, 2010-09-21 at 23:01 -0400, Steve Polyack wrote:
>   Is anyone else having issues using compat4x / running FreeBSD 4 
> binaries on 8.1-RELEASE?

At our shop, we're currently running 150+ 4.11-compiled i386 binaries on
FreeBSD-8.1 amd64. No problems found yet, but there were gotchas (keep
reading).


>   The requisite package is installed

I assume you're talking about the "compat4x" package (specifically
compat4x-i386-5.3_9).

You might interested to know that if you're trying to fully support 4.x
binaries on 8.1, you should also install the following package:

	compat5x-amd64-5.4.0.8_11

We've noticed here in our shop that not all 4.x shared-libraries are
available in the compat4x package. To get all the shared-libraries that
we were linking against in 4.x, we also had to install the compat5x
package.

Specifically, we found these 4.x shared-libraries were missing from
compat4x (at minimum; I'm sure there is more but the below list
encompases the ones that we ourselves needed):

/usr/local/lib32/compat/libcam.so.2
/usr/local/lib32/compat/libsbuf.so.2
/usr/local/lib32/compat/libz.so.2


> $ grep -ir compat /usr/src/sys/amd64/conf/PFSYNC-MFIB
> options         COMPAT_43TTY            # BSD 4.3 TTY compat (sgtty)
> options         COMPAT_IA32             # Compatible with i386 binaries
> options         COMPAT_FREEBSD4         # Compatible with FreeBSD4
> options         COMPAT_FREEBSD5         # Compatible with FreeBSD5
> options         COMPAT_FREEBSD6         # Compatible with FreeBSD6
> options         COMPAT_FREEBSD7         # Compatible with FreeBSD7

Here's our list:

[dteske at oos0a /]$ config -x `sysctl -n kern.bootfile` | grep -i compat | grep -v '^#'
options         COMPAT_43TTY            # BSD 4.3 TTY compat (sgtty)
options         COMPAT_FREEBSD32        # Compatible with i386 binaries
options         COMPAT_FREEBSD4         # Compatible with FreeBSD4
options         COMPAT_FREEBSD5         # Compatible with FreeBSD5
options         COMPAT_FREEBSD6         # Compatible with FreeBSD6
options         COMPAT_FREEBSD7         # Compatible with FreeBSD7
device          pty             # BSD-style compatibility pseudo ttys
device          ubsa            # Belkin F5U103 and compatible serial adapters
options         COMPAT_43       # Compatible with BSD 4.3 [KEEP THIS!]

Hmmm....

You're missing "COMPAT_43" ... that seems serious and likely to be the
cause of your "Exec format" error (below).

NOTE: I presume that the kernel config that you used does NOT include
"GENERIC" as all the COMPAT_* options that are in our kernel (shown
above) were actually there because we included the GENERIC config and
then used `nodevice'/`nooptions' to disable things we didn't like in
GENERIC and `device'/`options' to enable things that were missing from
GENERIC. I think that's a much safer route to go if you're not an
experienced kernel configurator.



> Interestingly enough, the compat4 libraries themselves don't seem to be 
> recognized:
> $ ldd /usr/local/lib32/compat/libfetch.so.2
> ldd: /usr/bin/ldd32: Exec format error

Here it is on our system:

[dteske at oos0a /]$ uname -a
FreeBSD oos0a.vbsd.vicor.com 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Fri Aug  6 14:52:42 UTC 2010     dteske at oos0a.vbsd.vicor.com:/usr/src/sys/amd64/compile/FIS-amd64  amd64

[dteske at oos0a /]$ ldd /usr/local/lib32/compat/libfetch.so.2
/usr/local/lib32/compat/libfetch.so.2:

Again, I think it's because your lack of "COMPAT_43" in your kernel.


> 
> Compat5x libraries do not appear to be affected:
> $ ldd /usr/local/lib/compat/libfetch.so.3
> /usr/local/lib/compat/libfetch.so.3:
>          libssl.so.3 => /usr/local/lib/compat/libssl.so.3 (0x800c00000)
>          libcrypto.so.3 => /usr/local/lib/compat/libcrypto.so.3 
> (0x800d3a000)

Same on our system.


> Has anyone else ran into this issue? I realize trying to use things 
> built for FreeBSD 4 may be like beating a dead horse at this point, I'm 
> just surprised that the compatibility was broken during a minor release 
> upgrade.

During the upgrade process, I think your kernel config lost something
(COMPAT_43).



> Thanks,
> 
> Steve Polyack
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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-- 
Cheers,
Devin Teske

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