[U-Boot] Fix for overlapping sections?

[U-Boot] Fix for overlapping sections?

[Ciummo, Larry]

Designation: Non-SSA/Finmeccanica 

A while back there was a fix for the overlapping section link problem
(see below) involving changing some sort of global.  Does anyone have a
pointer to the change.  I'm using a fairly old uboot for AMCC
Canyonlands/460Ex and can't easily upgrade to a newer uboot build.

Thanks
Larry

eldk/usr/bin/../lib/gcc/powerpc-linux/4.2.2/pic -lgcc -Map u-boot.map -o
u-boot
/opt/eldk/usr/bin/ppc_4xx-ld: section .bootpg [fffff000 -> fffff303]
overlaps section .data.rel.local [ffffe1d8 -> fffffebb]
/opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .bootpg lma 0xfffff000
overlaps previous sections
/opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .u_boot_cmd lma 0xfffffebc
overlaps previous sections
make: *** [u-boot] Error 1

3.1.0805

3.1.0805

[U-Boot] Fix for overlapping sections?

[Wolfgang Denk]

Dear "Larry",

In message <F4BA0E7CACFBAC4384DC92F2D5AAB507AB43EA@DSGBURGMAIL001.gburg.drs-ds.master> you wrote:
> 
> A while back there was a fix for the overlapping section link problem
> (see below) involving changing some sort of global.  Does anyone have a
> pointer to the change.  I'm using a fairly old uboot for AMCC
> Canyonlands/460Ex and can't easily upgrade to a newer uboot build.

I don't understand what you mean.  Why exactly can you not upgrade to
a recent version of U-Boot?  All it takes to get a current version of
U-Boot for the Canyonlands board is to type "./MAKEALL canyonlands".



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
A fail-safe circuit will destroy others.                 -- Klipstein

[U-Boot] Fix for overlapping sections?

[Charles Manning]

On Tuesday 19 April 2011 11:20:47 Ciummo, Larry (DS-1) wrote:
> Designation: Non-SSA/Finmeccanica
>
> A while back there was a fix for the overlapping section link problem
> (see below) involving changing some sort of global.  Does anyone have a
> pointer to the change.  I'm using a fairly old uboot for AMCC
> Canyonlands/460Ex and can't easily upgrade to a newer uboot build.
>
> Thanks
> Larry
>
> eldk/usr/bin/../lib/gcc/powerpc-linux/4.2.2/pic -lgcc -Map u-boot.map -o
> u-boot
> /opt/eldk/usr/bin/ppc_4xx-ld: section .bootpg [fffff000 -> fffff303]
> overlaps section .data.rel.local [ffffe1d8 -> fffffebb]
> /opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .bootpg lma 0xfffff000
> overlaps previous sections
> /opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .u_boot_cmd lma 0xfffffebc
> overlaps previous sections
> make: *** [u-boot] Error 1

Overlapping sections are commonly caused by one of two problems:
1) You have set up the memory map in a way that does not give enough space so 
the sections do indeed overlap.
2) Your ld script is not handling all the sections being fed to it. This is  
likely if you have switched to  using -ffunction-sections etc.

In the case of (2) you will need to modify your ld script with something like:
@@ -34,8 +34,8 @@ SECTIONS
        . = ALIGN(4);
        .text   :
        {
-               arch/arm/cpu/armv7/start.o      (.text)
-               *(.text)
+               KEEP(arch/arm/cpu/armv7/start.o (.text*))
+               *(.text*)
        }
 
        . = ALIGN(4);
@@ -70,7 +70,7 @@ SECTIONS
 
        .bss __rel_dyn_start (OVERLAY) : {
                __bss_start = .;
-               *(.bss)
+               *(.bss*)
                 . = ALIGN(4);
                __bss_end__ = .;
        }

[U-Boot] Fix for overlapping sections?

[Albert ARIBAUD]

Le 20/04/2011 21:03, Charles Manning a ?crit :
> On Tuesday 19 April 2011 11:20:47 Ciummo, Larry (DS-1) wrote:
>> Designation: Non-SSA/Finmeccanica
>>
>> A while back there was a fix for the overlapping section link problem
>> (see below) involving changing some sort of global.  Does anyone have a
>> pointer to the change.  I'm using a fairly old uboot for AMCC
>> Canyonlands/460Ex and can't easily upgrade to a newer uboot build.
>>
>> Thanks
>> Larry
>>
>> eldk/usr/bin/../lib/gcc/powerpc-linux/4.2.2/pic -lgcc -Map u-boot.map -o
>> u-boot
>> /opt/eldk/usr/bin/ppc_4xx-ld: section .bootpg [fffff000 ->  fffff303]
>> overlaps section .data.rel.local [ffffe1d8 ->  fffffebb]
>> /opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .bootpg lma 0xfffff000
>> overlaps previous sections
>> /opt/eldk/usr/bin/ppc_4xx-ld: u-boot: section .u_boot_cmd lma 0xfffffebc
>> overlaps previous sections
>> make: *** [u-boot] Error 1
>
> Overlapping sections are commonly caused by one of two problems:
> 1) You have set up the memory map in a way that does not give enough space so
> the sections do indeed overlap.
> 2) Your ld script is not handling all the sections being fed to it. This is
> likely if you have switched to  using -ffunction-sections etc.
>
> In the case of (2) you will need to modify your ld script with something like:
> @@ -34,8 +34,8 @@ SECTIONS
>          . = ALIGN(4);
>          .text   :
>          {
> -               arch/arm/cpu/armv7/start.o      (.text)
> -               *(.text)
> +               KEEP(arch/arm/cpu/armv7/start.o (.text*))
> +               *(.text*)
>          }
>
>          . = ALIGN(4);
> @@ -70,7 +70,7 @@ SECTIONS
>
>          .bss __rel_dyn_start (OVERLAY) : {
>                  __bss_start = .;
> -               *(.bss)
> +               *(.bss*)
>                   . = ALIGN(4);
>                  __bss_end__ = .;
>          }

Watch out: these are ARM excerpts. The original problem is on PPC, to 
which these might possibly not apply.

Aside: I understand the stars added because of the -ffunction-section in 
your example, but why the KEEP(), or more specifically, what makes it 
required with -ffunction-section? Unless you assume --gc-sections also?

Amicalement,
-- 
Albert.

[U-Boot] Fix for overlapping sections?

[Wolfgang Denk]

Dear "Ciummo, Larry (DS-1)",

please keep the mailing list on Cc:.

In message <F4BA0E7CACFBAC4384DC92F2D5AAB507B1165B@DSGBURGMAIL001.gburg.drs-ds.master> you wrote:
> 
> Stephan:

I'm not Stephan.

> Out board really isn't a Canyonlands, but a 460GT based board with a lot
> of custom hardware and mfg/bringup diagnostics code added.  Certainly
> porting to a newer uboot is possible, but would require a lot of work.

I expected something like this.  This is the penalty you have to pay
for not pushing your changes into mainline as soon as they are ready.

> I'd also like to wait until the AMCC folks get the DDR2 auto cal timing
> code in the main stream - I ported that myself and it took about a day
> to get it working, and I still haven't found a way to save the DDR2
> timing data somewhere to avoid the long boot process to determine them
> each time.  

Are you aware of any such activities?  I don't remember any related
postings.  The last posting from AMCC/APM appears to be from early
December 2010, and I cannot find any DDR initialization related
postings from them before that either.

I would not hold my breath waiting for any cod updates from that side.

> If you have any ideas on that let me know.

Well, with an out-of-tree port you are basicly on your own.  We don't
know that code, so the community cannot help you with it.

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
Anyone who isn't confused here doesn't really know what's going on.