[Vm-dev] 64bit squeak VM to run 32bit images? Catalina

[Clément Béra]

Ok,

I thought Bert had implemented support for Spur images in SystemTracer.

Simulator then. Thanks for the answer.

On Tue, Oct 22, 2019 at 4:17 AM David T. Lewis <lewis at mail.msen.com> wrote:

>
> Hi Cl??ment,
>
> As far as I know, the only way to convert a 32-bit Spur image to
> 64-bit Spur is with the VMMaker similator based conversion. No
> reverse conversion (64 bit to 32 bit) is currently available.
>
> SystemTracer has not been adapted to trace Spur images, so no
> in-image tool is available. But using the simulator tools in
> VMMaker to do conversions makes a lot of sense, because they
> are easier to debug and support. The only negative is that they
> require a separate helper image to perform the image tracing.
>
> As an aside, even though we may no longer have a need for tracing
> images on tiny machines with extremely small memories, the
> SystemTracer approach is really very cool and I cannot resist
> quoting this snippet from the comment of class SystemTracer:
>
>    NOTE:  The SystemTracer was invented by Ted Kaehler.  It has gone
>    through many variations.  I have simplified it and adapted it to
>    work with Squeak's limited Object hashing.  It has written runnable
>    Mac images on a Mac.  Some changes may be needed for it to produce
>    runnable images on a bigEndian machine.  -- Dan I. 9/29/97
>
> Dave
>
> On Mon, Oct 21, 2019 at 04:57:04PM +0300, Cl??ment B??ra wrote:
> >
> > Is there a tool to convert 32 bits images into 64 bits images?
> > I know it's possible through the Spur64bootstrap in the VMMaker packager.
> > But is it possible to do it with the ImageWriter? Is there an easy way to
> > load the packages and do it?
> > Sorry I'm not on squeak-dev, maybe I should be.
> >
> > On Fri, Oct 18, 2019 at 3:49 AM David T. Lewis <lewis at mail.msen.com>
> wrote:
> >
> > >  Hi John,
> > >
> > > On Thu, Oct 17, 2019 at 09:56:16PM +0000, John M McIntosh wrote:
> > > >
> > > > Does anyone have a build for making a 64bit squeak VM that runs 32bit
> > > images?
> > > > I have one from July 8th 2010.
> > > > Was there any created over the years since? Say pre-cog etc?
> > > > People are migrating to Catalina and discovering they can't access
> their
> > > old images.
> > > >
> > >
> > > See attached screen image.
> > >
> > > So yes, a 64-bit VM that runs 32-bit images is still available, and
> > > I use it on a daily basis.
> > >
> > > But two caveats:
> > >
> > > 1) You have to compile it yourself from squeakvm.org sources.
> > >
> > > 2) I use Linux, and nobody has been maintaining OS X or Windows
> > > for the interpreter VM.
> > >
> > > The traditional interpreter VM has problems on OS X nowadays. The
> > > Quartz VM display module does not build (the X11 display module is
> > > fine). And the VM "works" but crashes quickly as soon as you do
> > > something real with it. It looks to me like issues related to
> > > the llvm compiler (versus gcc). The updates by Nicolas and others
> > > in the oscog branch would probably address these issues, but I am
> > > not in a position to confirm.
> > >
> > > At the present time, older images are supported by either the
> > > SqueakJS VM, or by the traditional interpreter VM on Linux.
> > >
> > > Dave
> > >
> > >
> >
> > --
> > Cl??ment B??ra
> > https://clementbera.github.io/
> > https://clementbera.wordpress.com/
>
>

-- 
Clément Béra
https://clementbera.github.io/
https://clementbera.wordpress.com/
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