[U-Boot] "arm: keep all sections in ELF file" breaks Arndale

[Andre Przywara]

On 12/21/2013 09:57 PM, Andre Przywara wrote:
> On 12/21/2013 11:46 AM, Albert ARIBAUD wrote:
>> Hi Andre,
>>
>> On Wed, 18 Dec 2013 15:06:04 +0100, Andre Przywara
>> <andre.przywara at linaro.org> wrote:
>>
>>> On 12/17/2013 04:57 PM, Tom Rini wrote:
>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>> Hash: SHA1
>>>>
>>>> On 12/17/2013 10:47 AM, Andre Przywara wrote:
>>>>> (CCing Inderpal, Chander and Minkyu)
>>>>>
>>>>> On 12/17/2013 04:30 PM, Tom Rini wrote:
>>>>> On 12/17/2013 10:24 AM, Andre Przywara wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> the Arndale board does not work anymore with current master HEAD.
>>>>>>>> If I turn on the board, I see exactly nothing.
>>>>>>>>
>>>>>>>> I bisected it down to:
>>>>>>>> 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7 is the first bad commit
>>>>>>>> commit 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7
>>>>>>>> Author: Albert ARIBAUD <albert.u.boot at aribaud.net>
>>>>>>>> Date:   Thu Nov 7 14:21:46 2013 +0100
>>>>>>>>
>>>>>>>>        arm: keep all sections in ELF file
>>>>>>>>
>>>>>>>> That patch looks like Chinese to me, does one of you have an
>>>>>>>> idea what's
>>>>>>>> wrong here?
>>>>>>>> Are we missing a section, maybe for the SPL build?
>>>>>
>>>>> So on Arndale, what file do you boot exactly?  It sounds like not
>>>>> u-boot.img but some tool stripping / modifying u-boot (or
>>>>> spl/u-boot-spl) and having relied on certain sections being
>>>>> stripped out
>>>>> before being run.
>>>>>
>>>>>> Good point. Indeed I boot u-boot-dtb.bin (the SPL is
>>>>>> spl/arndale-spl.bin). So the Makefile does:
>>>>>> cat u-boot.bin u-boot.dtb >u-boot-dtb.bin
>>>>>
>>>>>> I guess the address under which U-boot expects to find the
>>>>>> attached dtb
>>>>>> changes due to the non-discarding.
>>>>>
>>>>>> Does any of the Arndale people have an idea how to fix this?
>>>>
>>>> That's a little confusing as we use objcopy -O binary to make
>>>> u-boot.bin/u-boot-spl.bin and that would, I would think, drop these
>>>> sections anyhow.  But some checking of binary size with the patch in
>>>> question locally reverted would help shed some light here.
>>>
>>> So I did objdump -h on ./u-boot, the diff (sorted by the section name,
>>> as the order of the section differed, and the size) is:
>>>
>>>    .ARM.attributes 0000002d
>>> -.bss            00048b10
>>> +.bss            00048b08
>>>    .bss_end        00000000
>>>    .bss_start      00000000
>>>    .comment        0000001c
>>> @@ -14,8 +14,12 @@
>>>    .debug_loc      00045a4e
>>>    .debug_ranges   00006f70
>>>    .debug_str      000123b4
>>> +.dynamic        00000080
>>> +.dynstr         0000001d
>>> +.dynsym         00000060
>>>    .got.plt        0000000c
>>>    .hash           0000002c
>>> +.interp         00000011
>>>    .rel.dyn        00006fd8
>>>    .rodata         0000ae47
>>>    .text           0002cdf0
>>>
>>> - works, + is broken.
>>> + is HEAD as of yesterday, - is the same with the patch in question
>>> reverted. So the patch _adds_ some sections to the file.
>>> u-boot-spl is exactly the same, for u-boot-spl.bin the broken version
>>> ends earlier (but until then is identical). arndale-spl.bin (which I
>>> flash) is different, though.
>>> Arndale uses CONFIG_OF_SEPARATE, and .text stays the same AFAICS.
>>>
>>> I can do some more debugging tomorrow, am grateful for any hints.
>>
>> Sorry for chiming in late. Did you try this?
>>
>> http://patchwork.ozlabs.org/patch/300928/
>
> I cannot reach the server. Can you give me a hint what this patch is
> about (or a Subject: line to search for on the ML?)

OK, now the server works again. Looks like this could fix it on the 
first glance, but I momentarily cannot test this. Will try to do this ASAP.

Thanks,
André.