[U-Boot] relocation problem on powerpc

[Chris Packham]

On Mon, Sep 8, 2014 at 4:32 PM, Chris Packham <judge.packham at gmail.com> wrote:
> Hi All,
>
> I have come across what I think is a relocation problem for powerpc.
>
> I've added the following to ArpTimeoutCheck
>
> +       printf("NetArpWaitTimerStart = %ld\n", NetArpWaitTimerStart);
> +       printf("&NetArpWaitTimerStart = %p\n", &NetArpWaitTimerStart);
> +       printf("NetArpWaitTry = %d\n", NetArpWaitTry);
> +       printf("&NetArpWaitTry = %p\n", &NetArpWaitTry);
> +       printf("NetArpWaitTxPacketSize = %d\n", NetArpWaitTxPacketSize);
> +       printf("&NetArpWaitTxPacketSize = %p\n", &NetArpWaitTxPacketSize);
>
> Which yields the following output
>
>   NetArpWaitTimerStart = 0
>   &NetArpWaitTimerStart = f00000d0
>   NetArpWaitTry = 1
>   &NetArpWaitTry = 7ffb0058
>   NetArpWaitTxPacketSize = 42
>   &NetArpWaitTxPacketSize = 7ffb0078
>
> That looks to me like NetArpWaitTimerStart hasn't been relocated for
> some reason. Looking at my u-boot.map NetArpWaitTimerStart is the last
> item in the .sbss section
>
> Here's the relevant snippets for the variables I'm displaying
>
>  0x00000000f0000058                NetArpWaitTry
>  0x00000000f0000078                NetArpWaitTxPacketSize
>  0x00000000f00000d0                NetArpWaitTimerStart
>
> The actual problem for me is that ARPs timeout and various network
> things fail. Has anyone got any clues as to why this one particular
> variable isn't getting relocated.
>
> Thanks,
> Chris
>
> More info:
>   I'm building P2041RDB_config
>
>   $ git describe
>   v2014.10-rc2-15-g2ec8915
>
>   => version
>   U-Boot 2014.10-rc2-00015-g2ec8915-dirty (Sep 08 2014 - 16:18:42)
>   powerpc-e500-linux-gnu-gcc (Gentoo 4.6.3-r1 p1.9, pie-0.5.2) 4.6.3
>   GNU ld (GNU Binutils) 2.21

Actually could this be a compiler problem? I tried a different
toolchain and got some different results. Any suggestions for
diagnosing it?