Re: Kernel 2.6.10-rc1 yet not running on ads8272

[alebas@televes.com]

Mark,

I have tried this before and this doesn't work.
Execution flow never arrives to "2:".

All the other values are extra info I have collected.
But problem was isolated using breakpoints to avoid
stepping influence.

Best regards,

Alex

Citando Mark Chambers <markc@mail.com>:


> RFI = Return From Interrupt.  In normal usage the current
> address is copied into SRR0 when an exception occurs so
> the processor will return to that point with an RFI.  So this
> code is 'faking out' the RFI instruction to return to 2:
>
> Are you maybe trying to trace through this code?  If so,
> and depending on your debugger, you may not be able to.
> If your debugger uses trace or some other exception to do
> single step, once you get past mtspr SRR0,r4 the single
> step exception will overwrite the correct SRR0.  You
> can see if this is the case by only tracing to mtspr SRR0,r4
> and then putting a breakpoint at 2:
>
> Good luck,
> Mark Chambers
>