RE: [avr-gcc-list] Option to remove unused trampoline space gives bad link

[Stu Bell]

Hi Eric!

I don't believe it to be a FreeRTOS bug, per se, but I cannot see what
is going wrong.  I admit that I haven't spent much time on it recently.
(Darn customers!  They actually expect you to work for THEM! ;-) ).

It is possible that I am not initializing the task stacks correctly for
the mega2560, since the failure seems to occur at the task switch.
Perhaps I missed an extra state bit somewhere -- no, it's not the PC, I
GOT that!  I don't know why the --relax option on the linker would
sensitize the problem this way.  At any rate, I plan to spend more time
on it but for now the extra 1200 bytes aren't killing me.

Please leave it open for the moment, but feel free to ping me.  If you
would like me to put it into some "delayed" state, I would be happy with
that.  I don't think the bug should be closed -- until I run this down
to root cause, it is possible someone else will come across it.

Best regards, 

Stu Bell 
DataPlay (DPHI, Inc.) 


-----Original Message-----
From: Eric Weddington [mailto:address@hidden 
Sent: Tuesday, April 10, 2007 4:52 PM
To: Stu Bell
Cc: address@hidden
Subject: RE: [avr-gcc-list] Option to remove unused trampoline space
gives bad link

Hi Stu,

Any more information on this potential bug? If the bug is in FreeRTOS,
would
you be willing to close the binutils bug report?

Thanks
Eric

> -----Original Message-----
> From: Stu Bell [mailto:address@hidden 
> Sent: Friday, March 30, 2007 11:02 AM
> To: Francesco Sacchi; Eric Weddington
> Cc: address@hidden
> Subject: RE: [avr-gcc-list] Option to remove unused 
> trampoline space gives bad link
> 
> Hi all,
> 
> Just a quick update -- I've spent over a day now trying to chase it
> down.  The generated code looks fine, but it doesn't work.  My error
> seems to be occurring in the task switching code in FreeRTOS.  None of
> the code is currently over the 128K Flash page boundary, so 
> I'm still in
> a 16-bit PC address.  *sigh*
> 
> More info as I get it.
> 
> Best regards, 
> 
> Stu Bell 
> DataPlay (DPHI, Inc.) 
> 
> 
> -----Original Message-----
> From: Francesco Sacchi [mailto:address@hidden 
> Sent: Friday, March 30, 2007 7:15 AM
> To: Eric Weddington
> Cc: Stu Bell; address@hidden
> Subject: Re: [avr-gcc-list] Option to remove unused trampoline space
> gives bad link
> 
> Eric Weddington ha scritto:
> > Hi Stu,
> > 
> > Can you fill out a bug report?:
> > <http://sourceware.org/bugzilla/enter_bug.cgi>
> > Select the "binutils" product, and under the "target 
> triplet" item put
> > "avr". Let me know what the bug # is so I can help to track it.
> 
> 
> This option is very interesting, can free a very large amount 
> of flash.
> 
> I've tried but there must be something wrong, cause my 
> (large) code was 
> not working anymore. I'll try to supply a testcase but it's not easy, 
> cause I have to look directly in elf file.
> 
> Please put me in CC of the bug too, maybe I can add more info to bug 
> report soon.
> -- 
> _|/ Francesco Sacchi - Develer S.r.l., R&D dept.
>   |\ http://www.develer.com/
>