Mark Cave-Ayland wrote:
Tarl Neustaedter wrote:
Continuing to work on Milax, I've found out that the infinite loop bug I'm getting here is because of an MMU problem - two different virtual addresses appear to be mapped to the same physical address.
I believe that's legal. I know that OBP used to do that on sun4s systems.
Oh that's interesting to know; however in this case I'm fairly confident it's broken :( What happens is that first the volume descriptor is read from the ISO image into a special buffer, and subsequent reads for file entries should then go into a different buffer. Unfortunately the subsequent reads into the second buffer seem to be mapped to the same memory location
Ah. So the problem isn't that you have two virts->one phys, but that you expect your two virts to have different physical backing, and they don't.
Yup, that's a bug :-)