Re: [hatari-devel] Pure debugger, illegal opcodes, exceptions

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On keskiviikko 10 lokakuu 2012, Thomas Huth wrote:
> I remember that we had to fix bus error handling in the old UAE core a
> couple of years ago ... maybe the WinUAE core also does not use the
> right stack frames yet (at least the 68030 MMU mode uses the wrong
> stack frames as Andreas already discovered).
> 
> I'm quite busy this week, but if somebody wants to have a look, check
> the exception functions in cpu/newcpu.c for the right bus error stack
> layout...

I noticed that there was one exception handling fix in v1.6.2 to old UAE
core by Nicolas that doesn't seem to have been applied to WinUAE core:
http://hg.tuxfamily.org/mercurialroot/hatari/hatari/log/tip/src/uae-
cpu/gencpu.c

E.g. the "Fix return PC when JMP generates an illegal address exception"
wasn't applied to WinUAE core:
http://hg.tuxfamily.org/mercurialroot/hatari/hatari/log/tip/src/cpu/gencpu.c


Another one could be here:
http://hg.tuxfamily.org/mercurialroot/hatari/hatari/log/tip/src/uae-
cpu/newcpu.c

"While processing an exception, raise an address error exception if
the new PC is not even" isn't mentioned in WinUAE log:
http://hg.tuxfamily.org/mercurialroot/hatari/hatari/log/tip/src/cpu/newcpu.c

For exceptions there's just some commits for MMU and for disabling
Amiga specific stuff.


	- Eero