On 09/09, Jan Kratochvil wrote:
>
> On Thu, 09 Sep 2010 17:50:47 +0200, Oleg Nesterov wrote:
> > Probably I need to implement G/P first, otherwise gdb can't change ip.
> >
> > Still, I'd appreciate if someone can explain me what gdb needs/expects
> > to handle breakpoints before I start to read the sources.
>
> Yes, GDB tries to set PC to PC-1 to skip back after the hit of 0xCC.
> As it fails to fix-up PC then PC is wrong and trap_expected is then 0 (it
> should be 1) and everything fails.

OK. I'll implement G or P, then we will see.

But probably not right now, I have to switch to bug-report I have.

> BTW ugdb needs one simple fix. :-)
> (gdb) p/x done=0x5a
> $1 = 0xa5

OOPS! indeed, unhex() confuses lo and hi. I am attaching ugdb.c with
the trivial fix.

Thanks!

Cough... could you tell me how can I change the variable "done"
without printing it?

Oleg.