Subramanyam Badri wrote:
> Hi,
>
> I am using a GCC compiler for ARM and see an alignment problem with pointer typecasting. We're porting code to ARM and found some writes to incorrect addresses. Can you help? For example:
>
> char * pChar = (char *)0x100000; /* hardcoded for example purposes */
> pChar[0] = 0x0;
> *(int *)&pChar[1] = 0x11223344;
>
> /* We really want pChar[0] to equal 0x00, but it equals 0x44 on ARM!!!! */
> printf ("pChar[0] = 0x%02x\n", pChar[0]);
>
> My understanding is that non-aligned memory access is allowed on ARM,
No, that's not true. *Some* versions of ARM have some support for unaligned
memory accesses, some don't. You need to be sure which one you've got.
Andrew.
