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Groups > comp.sys.acorn.programmer > #551

Re: Problem with longjmp on A9

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In message <5c3080f151.pittdj+@iyonix.home>
 on 12 Jul 2011 David Pitt  wrote:

> In message <a0470ef151.martin@bach.planiverse.com>
>   Martin Wuerthner <spamtrap@mw-software.com> wrote:
> 
> > In message <ac6ff5ef51.Matthew@sinenomine.freeserve.co.uk>
> >           Matthew Phillips <spam2011m@yahoo.co.uk> wrote:
> 
> [snip]
> 
> >> I'm not very familiar with the A9: would it be possible (or indeed
> >> advisable)
> >> to softload a different version of the Shared C Library?
> 
> > Yes, that should be possible. It was not an option in 2006 because
> > there was no such version available for public distribution (the
> > softload CLib for the Iyonix could not be used), but it should be easy
> > enough nowadays to build a suitable CLib from the ROOL sources.
> 
> I tried my luck on the A9home using the 32bit build of the 32bit CLib 
> 5.56, as supplied in the EndUser directory of the ROOL Tools, the one 
> in Modules.500 that is. Using a test from Matthew the longjmp then 
> landed in the right place.

Or more to the point, landed with the registers intact.  The longjmp was
going to the correct place, but with a register corrupted.

My test only exercised printf, fopen, fprintf and fclose, so it's not very
rigorous as far as detecting whether it is safe to run that version of the
Shared C Library on the A9.

You'd really need to load it and then run a selection of C-based applications
to give it a good test.  I don't know anything about how the Shared C Library
interacts with the rest of the OS, so I wouldn't like to suggest what things
might go wrong if it does prove to be incompatible.

It would be very interesting if the fix was as simple as loading this version
though.  Do please let us know what you find.

-- 
Matthew Phillips
Durham

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Problem with longjmp on A9 Matthew Phillips <spam2011m@yahoo.co.uk> - 2011-07-09 07:31 +0100
  Re: Problem with longjmp on A9 wpb <willblatchley@yahoo.com> - 2011-07-10 21:20 -0700
    Re: Problem with longjmp on A9 David Pitt <pittdj@pittdj.co.uk> - 2011-07-11 07:28 +0100
  Re: Problem with longjmp on A9 Martin Wuerthner <spamtrap@mw-software.com> - 2011-07-11 11:39 +0200
    Re: Problem with longjmp on A9 David Pitt <pittdj@pittdj.co.uk> - 2011-07-12 07:23 +0100
      Re: Problem with longjmp on A9 Matthew Phillips <spam2011m@yahoo.co.uk> - 2011-07-12 21:15 +0100

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