Re: [avr-libc-dev] noinitdata section ?

[daniel_laptop]

"Theodore A. Roth" wrote:

> On Wed, 28 Aug 2002, daniel_laptop wrote:
>
> :)"Theodore A. Roth" wrote:
> :)
> :)> On Wed, 28 Aug 2002, daniel_laptop wrote:
> :)>
> :)> :) Has any of the noinitdata section been implemented ?
> :)> :) If so - where can I find info. (source or doc file etc.) ?
> :)> :) If not - is noinitdata going to be looked at ?
> :)>
> :)> Well, I just grep'ed for 'noinitdata' through all the files in binutils,
> :)> gcc and avr-libc (all cvs, about a week old) and didn't see anything.
> :)>
> :)> Marek would know more about this than me.
> :)>
> :)
> :)OK so "noinitdata" is all possible future stuff then ;-)
>
> I was just digging around and saw this in one of the linker scripts
> (avr5.x):
>
>   /* Global data not cleared after reset.  */
>   .noinit  SIZEOF(.bss) + ADDR(.bss) :
>   {
>      PROVIDE (__noinit_start = .) ;
>     *(.noinit*)
>      PROVIDE (__noinit_end = .) ;
>      _end = . ;
>      PROVIDE (__heap_start = .) ;
>   }  > data
>
> Is this what you are looking for?
>
>
> I'd like to know what this .noinit section is and what it's relationship to
> .bss is so that I can document it.
>
>
> Ted Roth

Yes this looks like what I was talking about :-)
(data area that will survive a reset,
or if in external battery backed sram survive power off/on)

documentation would be nice ;-)

Now I'm going to go and try this out.

Thanks

Daniel