Re: [MiNT] Current beta problems - solved

[Maurits van de Kamp <maurits@bassment.demon.nl>]

On Fri, 27 Aug 1999, Lonny Pursell wrote:

> >I don't see that there is any way MiNT can know whether the program is
> >relying on the values in those registers or not...
> 
> I think what kellis was trying to say was this.  The kernal could help
> by noting the values of these registers prior to such a call and then
> check the values after the call to see if they have indeed changed.  If they
> changed it could issue some debug message depending on the debug level.
> Perhaps saying... "Process blah might be relying on registers blah..."
> Might slow things down perhaps so this test could only be applied if the debug
> level is high enough.

This basically means, warning about every system call that changes any
registers. Aren't there loads that do that? And wouldn't the output of
such a debug version be just a messy version of a simple doc that tells
you which calls change which registers?

Might be easier to adapt the kernel to support some "buggy-programs-mode"
in which it just preserves all register values.. a lot easier than
detecting changes and logging them. :)

Maurits.


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