Re: [hatari-devel] Debugger 'n' command

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

Vincent, is the patch enough for what you were looking for?

	- Eero

On 04/11/2016 01:55 AM, Eero Tamminen wrote:
> Hi,
>
> On 04/11/2016 01:01 AM, Nicolas Pomarède wrote:
> > Le 10/04/2016 23:40, Eero Tamminen a écrit :
> >
> > > The reason why it's not currently supported, is that branching
> > > can also be forwards.  Then "n" command breakpoint for the next
> > > instruction might never terminate, which IMHO is worse than
> > > lacking support for skipping loops.
> > >
> > > Does somebody feel adding support for determining when instruction
> > > at PC is a branch going backwards?  :-)
> >
> > For bne/beq it would be more complicated, but in the case of dbcc it
> > will mostly be backward ; dbcc uses 2 words, 1 with the opcode, 1 with
> > the displacement ; if the the 2nd word is <0, then it will go backward
> > and a breakpoint after the dbcc will work.
> >
> > format for DBcc is : 0101 cccc 1100 1rrr  . so if ( opcode & 0x50A8 ) ==
> > 0x50a8, then you have a DBcc and you can check the next word.
>
> Does the attached patch work OK?
>
>
>      - Eero