On Saturday 2008-10-04 00:21, Martin Schwenke wrote:
> Jan> #include <stdio.h>
> Jan> /* userspace program here */
> Jan> printf("%Zu\n", __alignof__(uint64_t));
>
> Jan> give on ARM?
>
>If I compile using the native Debian etch gcc:
>
> gcc (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
>
>then it prints 4.
It's what I thought. There lies the reason for all those strange issues on
embedded devices ;-)
You can change the XT_ALIGN macro in the
kernel/include/linux/netfilter/x_tables.h and
iptables/include/linux/netfilter/x_tables.h to read
#ifndef roundup
#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
#endif
#define XT_ALIGN(s) roundup(s, sizeof(uint64_t))
and try again. There might be more alignment issues hiding, so
don't expect it to fix it all in a magic whizz.
>If I use the cross-compiler that I use to compile kernels (and use
>--static) then it prints 8. The version is:
>
> arm-none-linux-gnueabi-gcc (Sourcery G++ Lite 2008q1-126) 4.2.3
>
>So there does seem to be a mismatch.
>
>However, compiling iptables statically with the cross-compiler results
>in:
>
> # ./iptables -L
> getsockopt failed strangely: No such file or directory
>
>Of course, I can't strace it because it is static.
stracing is independent of staticness/dynamicness.
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