Re: running old binaries on -current

On Sun, Dec 04, 2011 at 08:54:27PM +0100, Yamagi Burmeister wrote:
> On Fri, 2 Jul 2010 21:44:26 +0300
> Kostik Belousov <kostikbel_at_gmail.com> wrote:
> 
> > On Fri, Jul 02, 2010 at 11:12:13AM -0700, Julian Elischer wrote:
> > > every now and then, for fun I run up a chroot of freebsd 1.1. or 1.0 
> > > under a chroot.  Usually hillarity ensues with teh 15 second kernel 
> > > compile and the 4 minute make world.
> > > 
> > > in -current I can't do that any more.. any binary just exits with 'Abort'.
> > > 
> > > I think I last tried it in 7.0 or there abouts.
> > > 
> > > I have options COMPAT_AOUT and COMPAT_FREEBSD4 through COMPAT_FREEBSD7
> > > 
> > > does anyone else have any ideas as to what may be needed?
> > > 
> > > I vaguely remember another option but I am not seeing it at the moment.
> > > 
> > > For those of you who do not remember, 1.0 had a.out static binaries only.
> > > 
> > 
> > Can you ktrace/kdump the run attempt, I suspect that abort is
> > sent by image activator.
> > 
> > Also, please put some static binary somewhere to download.
> 
> Hi,
> digging around I found one of the first programs ever written. It's an
> static aout binary from 1994 or so, running it on FreeBSD 8.2 shows
> exactly this problem. Some more extensive tests narrowed this problem
> down to FreeBSD 1.x binaries, they're all broken. FreeBSD 2 aout
> binaries are still working. 
> Since Google found this rather old thread I decided to provide the data
> your requested, but I do not insist on a fix. I guess that nobody will
> try to run FreeBSD 1.x binaries these day... So if you want to spend
> some work on this I'll test patches but if you decide to do nothing
> it's okay.
> 
> This is the /bin/sh of FreeBSD 1.0 (taken from the official
> installation cd image f?r i386):
> 
> % file sh
> sh: VAX demand paged pure executable
> 
> % ./sh
> Abort
> 
> The ktrace / kdump:
>   1065 ktrace   RET   ktrace 0
>   1065 ktrace   CALL  execve(0xbfbfee1b,0xbfbfecf8,0xbfbfed00)
>   1065 ktrace   NAMI  "./sh"
> 
> I've uploaded the binary to:
> http://deponie.yamagi.org/freebsd/tmp/sh_freebsd1
Try to set sysctl security.bsd.map_at_zero to 1.