Re: [MiNT] Corruption of high TPA

["Konrad M. Kokoszkiewicz" <draco@obta.uw.edu.pl>]

> On my problematic MiNT setup, it crashes even before displaying the message! 
> But if I subtract 36 bytes from my new stack, it works. So it looks like the 
> 36 highest bytes of the TPA are getting corrupted by something.

Is memory protection enabled in your setup? If so, setting the sp at the 
end of the TPA will, IIRC, cause the program to crash at the nearest 
system call. This is so because the kernel entry code copies similar 
amount of bytes from the user stack to the supervisor stack. Because it 
does not know, how many bytes it should copy, it always copies the maximum 
amount, and there are kludges in the kernel to fix the sp at the correct 
value, when the program starts, but if you set it "manually", it will not 
work.

That's what I remember, but maybe it is something else.

Pozdrawiam
KMK