exception stack and TLB's

[degan]

Is it possible to define a TLB for the exception stack or must the exception stack always be in miss-proof memory?

If I can, what happens if a stack overflow/underflow occurs while handling an exception? What I am seeing is TLB miss after TLB miss and the stack just walks off the end of memory.


Thanks,

Doug

[mnorman]

Is the TLB miss occuring on an instruction fetch (fault status 0101)?   It sounds like the access to either the vector table or the exception routine is causing a miss that results in a recursive miss-exception loop.

[degan]

No, the miss is happening when the interrupt stack is blown when pushing data onto it. We would like to setup guard pages around the interrupt stack to cleanly recover from overflowing it. I haven't been able to see how to do that.