Date:   Mon, 30 Oct 2017 17:24:34 +0100
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrea Adami <andrea.adami@...il.com>,
        Romain Izard <romain.izard.pro@...il.com>,
        Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>,
        Petr Cvek <petrcvekcz@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: add a private asm/unaligned.h

Hi Russell King,
 
 On lun., oct. 30 2017, Russell King - ARM Linux <linux@...linux.org.uk> wrote:

> On Mon, Oct 30, 2017 at 05:01:44PM +0100, Gregory CLEMENT wrote:
>> Hi Russell King,
>>  
>>  On lun., oct. 30 2017, Russell King - ARM Linux <linux@...linux.org.uk> wrote:
>> 
>> > On Mon, Oct 30, 2017 at 02:48:02PM +0100, Gregory CLEMENT wrote:
>> >> Hi Russell,
>> >> 
>> >> So I tested the branch fixes in your git tree.
>> >> 
>> >> After doing a "make multi_v7_defconfig; make zImage", I got the message
>> >> "arm-linux-gnueabi-ld: error: zImage file size is incorrect" you added
>> >> in the commit "ARM: verify size of zImage".
>> >> 
>> >> It is the same with mvebu_v7_defconfig, so I wonder wich with
>> >> configuration this patch was tested ?
>> >
>> > I heard a similar report from Olof when his autobuilder produced 100%
>> > failure.  I tried one of the same defconfig's that Olof tried here,
>> > and didn't see the failure.  It passes my build tests here, and it
>> > also passes kernelci's build tests too.
>> >
>> > So, I _think_ it's got something to do with the toolchain versions
>> > being used, but at the moment I'm just guessing.  I've no real idea,
>> > because I've no idea what's causing the failure at the moment.
>> >
>> > Olof said that he'd send me one of the build trees, but I'm still
>> > waiting.
>> >
>> > What I need is a tarball of the objects from arch/arm/boot/compressed
>> > to work out what's going on - when grabbing that, it may be a good
>> 
>> I've just attached this tarball to this email. It might be rejected by
>> the mailing list, but as you are also in the "To" field you should
>> receive it.
>> 
>> Actually the archive is the full content of arch/arm/boot/compressed
>> from my build directory and I removed vmlinux and all the piggy files to
>> have a small archive.
>> 
>> If they are also needed then I can provide an url for it.
>
> Thanks.
>
> Unfortunately, I can't reproduce the issue using your objects and my
> linker.
>
> If I modify your vmlinux.lds to add the assert in, and then link using:
>
> $ arm-linux-ld -o vmlinux -T vmlinux.lds *.o --defsym _kernel_bss_size=0 \
>   --defsym input_data_end=0 --defsym input_data=0
>
> Then it links successfully.  If I objcopy that:
>
> $ arm-linux-objcopy -O binary -R .comment -S vmlinux zImage
> $ vdir zImage
> -rwxrwxr-x 1 rmk rmk 27784 Oct 30 16:10 zImage
> $ arm-linux-nm vmlinux |grep _edata
> 00006c88 D _edata
> $ echo $((0x6c88))
> 27784
>
> So it all looks sane here.  So my hunch is that whatever's going wrong,
> it's going wrong at the final link, which means I need the vmlinux as
> generated by your toolchain.

Here you will find all the objects included the vmlinux:

http://free-electrons.com/~gregory/pub/compressed.tgz

Gregory


>
> -- 
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-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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