hemanth.venkatesh@xxxxxxxxx wrote:
> Hi All,
>
>
>
> I ran the below program on an IA32 and AU1100 machine, both being little
> endian machines and got different results. Does anyone know what could
> be the cause of this behaviour. This problem is blocking us from booting
> the cramfs rootfs.
>
>
>
> #include <stdio.h>
>
> typedef unsigned int u32;
>
> main()
>
> {
>
> struct tmp{
>
> u32 namelen:6,offset:26;
>
> }tmp1;
>
> (*(int *)(&tmp1))=0x4c0;
This makes non-portable assumptions about the bitfield layout. The
results are platform-dependent (or rather ABI-dependent). Portable
code needs to avoid acessing bitfields via typecasts.
Thiemo
