Re: [avr-gcc-list] Frame pointer location

[Johannes Bauer]

On 13.08.2010 10:32, Johannes Bauer wrote:

> If it is not possible and I would like to change that myself for
> debugging - what parts would I have to look at? Is it easily done or is
> that a difficult change?

I've looked into that matter and actually already played around with it 
a bit. The problem I'm seeing after moving around the FP-code is that 
the offsets relative to the frame pointer stay the same in the generated 
code within the function. I.e. when the ldd instruction refers to "Y+n", 
that has to be changed to "Y+n-Framesize" in the variant that pushes the 
FP on the stack first.

I think it's quite doable. Would such a patch have any chance for 
inclusion, if it were done in a clean way? Is that interesting for 
anybody else besides me? The reason I'm asking is this: If I'm not the 
only one interested in the topic, I'd do it in a clean, nice way and 
hope for inclusion. If I'm the only one, I'm going to do a 
quick-and-dirty hack and not care :-)

I'll not be available for the next two weeks, please be patient, I'll 
respond as soon as I'm back.

Kind regards,
Johannes