[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[Joey Oravec]

This email is to report a problem building u-boot 2011.12 with a gcc 
4.3.2 toolchain. I've added support locally for a marvell 78xx0 based 
board. It's using arm926ejs and I have not modified the *.lds linker script.

Case 1: With gcc 4.3.2 provided by marvell, the build fails with this error:

arm-mv5vfp-linux-gnueabi-ld: section .bss [00000000fffbba08 -> 
00000000fffc3137] overlaps section .rel.dyn [00000000fffbba08 -> 
00000000fffbeea7]
arm-mv5vfp-linux-gnueabi-ld: section .dynsym [00000000fffbeea8 -> 
00000000fffbef57] overlaps section .bss [00000000fffbba08 -> 
00000000fffc3137]
arm-mv5vfp-linux-gnueabi-ld: u-boot: section .bss lma 0xfffbba08 
overlaps previous sections
make: *** [u-boot] Error 1

Through trial-and-error, I found that this error only occurs when .bss 
is unaligned. In my example .bss is only 2-byte aligned and u-boot.map 
indicates that the linker added 2-bytes of zero fill at the end of bss. 
If I add a global unsigned short so .bss is 4-byte aligned the error 
goes away and gcc produces a good binary.

Case 2: With gcc 4.6.3 built with crosstool-ng, the build has no problem.

I can provide u-boot.map files (~70k) for each case.

-joey

[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[Wolfgang Denk]

Dear Joey Oravec,

In message <4F834E09.3010600@drewtech.com> you wrote:
> This email is to report a problem building u-boot 2011.12 with a gcc 
> 4.3.2 toolchain. I've added support locally for a marvell 78xx0 based 
> board. It's using arm926ejs and I have not modified the *.lds linker script.
> 
> Case 1: With gcc 4.3.2 provided by marvell, the build fails with this error:
...
> I can provide u-boot.map files (~70k) for each case.

Thanks, but what should we do about that?  You are referring to code
that is unknown to us, and to a tool chain we have no access to.

It would probably be best to report this to the Marvell compiler team.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
There were meetings. There were always meetings. And they were  dull,
which is part of the reason they were meetings. Dull likes company.
                                    - Terry Pratchett, _Making_Money_

[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[Joey Oravec]

On 4/9/2012 5:12 PM, Wolfgang Denk wrote:
> Dear Joey Oravec,
>
> In message<4F834E09.3010600@drewtech.com>  you wrote:
>> This email is to report a problem building u-boot 2011.12 with a gcc
>> 4.3.2 toolchain. I've added support locally for a marvell 78xx0 based
>> board. It's using arm926ejs and I have not modified the *.lds linker script.
>>
>> Case 1: With gcc 4.3.2 provided by marvell, the build fails with this error:
> ...
>> I can provide u-boot.map files (~70k) for each case.
> Thanks, but what should we do about that?  You are referring to code
> that is unknown to us, and to a tool chain we have no access to.
>
> It would probably be best to report this to the Marvell compiler team.

Possibly nothing -- I'm reporting it because there have been other 
mailing list thread with the same error message, sometimes without a 
clear resolution:

http://lists.denx.de/pipermail/u-boot/2012-February/117009.html
http://lists.denx.de/pipermail/u-boot/2010-November/082122.html

I don't know enough about the linker or *.map file to understand the 
root cause of the error message. I can only report my observations and 
suggest that if somebody else hits the same problem they should try 
using a newer toolchain. In my case it fixed the problem.

I don't need anybody to take any action on this, so feel free to 
disregard if this report is not interesting. I have no support through 
Marvell but I thought it was appropriate to share my results with this 
mailing list.

-joey

[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[Wolfgang Denk]

Dear Joey,

In message <4F835962.7010902@drewtech.com> you wrote:
>
> I don't need anybody to take any action on this, so feel free to 
> disregard if this report is not interesting. I have no support through 
> Marvell but I thought it was appropriate to share my results with this 
> mailing list.

Please don't misunderstand me.  This is certainly interesting
information, and probably even important to some.  Unfortunately we
can do nothing to help it, as we don;t have access to the Marvell code
nor tool chain.

I think you should still report it to Marvell, so they know as well.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Drun'? 'm not drun'! You woudn' dare call m' drun' if I was sober!
                                     - Terry Pratchett, _Men at Arms_

[U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12

[Dirk Behme]

On 10.04.2012 10:02, Wolfgang Denk wrote:
> Dear Joey,
>
> In message<4F835962.7010902@drewtech.com>  you wrote:
>>
>> I don't need anybody to take any action on this, so feel free to
>> disregard if this report is not interesting. I have no support through
>> Marvell but I thought it was appropriate to share my results with this
>> mailing list.
>
> Please don't misunderstand me.  This is certainly interesting
> information, and probably even important to some.  Unfortunately we
> can do nothing to help it, as we don;t have access to the Marvell code
> nor tool chain.

If I read the logs correctly, this was seen with other tool chains, 
e.g. Codesourcery ones, too.

But if I remember correctly, the conclusion was to use newer, not 
'broken' tool chains. Whatever 'broken' does mean here ;)

Best regards

Dirk