[U-Boot] embedded standalone app for AVR32

[FLYNN Sean]

I suspected the linkerscript was the issue.

Can anyone point me in the right direction to a correct linker script
for my purposes or even a good online source on how to correctly edit or
generate a linker scripts with regards to interrupts/heap/stack/etc
allocation rules/guidelines?.  I have tried editing these on my own
(using scripts from Atmel, gnu script for the atap7000 chips, u-boot and
freertos) with no luck.

I'm having difficulty understanding why my app isn't working.  I'm
guessing I'm close but I'm missing a piece of this puzzle.

Best regards,
Sean

Sean Flynn Sean.Flynn at HexagonMetrology.com
Senior Software Engineer
Hexagon Metrology, Inc
Brown & Sharpe division
250 Circuit Drive
North Kingstown, RI, 02852
phone:  1-401-886-2686
fax:       1-401-886-2228
www.HexagonMetrology.us

-----Original Message-----
From: Haavard Skinnemoen [mailto:haavard.skinnemoen at atmel.com] 
Sent: Friday, September 12, 2008 5:17 AM
To: FLYNN Sean
Cc: u-boot at lists.denx.de
Subject: Re: [U-Boot] embedded standalone app for AVR32


"FLYNN Sean" <Sean.Flynn at hexagonmetrology.com> wrote:
> When I included the interrupts in this application I was receiving
> __heap_start__ and __heap_end__ undefined (along with a few other
minor
> linking errors that I fixed due to gcc libraries that were not linked
> in).  I attempted to define these areas in the linkerscript and was
able
> to get my app to build but it would not run.  I attempted many
different
> iterations defining the heap sections unsuccessfully.   FWIW I also
> attempted to allocate some memory using malloc to see if the heap was
> the problem and that wouldn't run either.

Please keep talking to support about this. It sounds like a problem
with the linkerscript you're using and has nothing to do with u-boot.

> Hopefully I made myself clear in this e-mail but my ultimate goal is
to
> run an embedded app under u-boot, exit and boot to linux.

I don't think you can return to u-boot if you reprogram the interrupt
controller, or alter any other hardware that u-boot is using.

Haavard