Unaligned access exception

Somewhat similar to this: https://answers.launchpad.net/gcc-arm-embedded/+question/452880

No, it looks similar, but isn't same.
Cortex-A/R can access to unaligned pointer. Problem is difference between LDR/STR and LDRD/STRD instructions.
First (LDR/STR) work without problem. Second (LDRD/STRD) used by optimalizator can't access unaligned memory.

OK it isn't same issue, but solution is same. We are miss to use __attribute((__packed__)) somewhere in complex code.

Lets have this sample of C code
    typedef struct unaligned_struct {
      int a;
      int b;
    } __attribute((__packed__)) unaligned_struct_t;

    int unalignedTest (unaligned_struct_t *x)
    {
      return x->a + x->b;
    }

Without __attribute((__packed__)) it produce code like this:
       ldmia r0, {r0, r2}
        add r0, r0, r2
        bx lr

And with __attribute((__packed__)) magic it produce this correct code:
      ldr r2, [r0] @ unaligned
      ldr r0, [r0, #4] @ unaligned
      add r0, r0, r2
     bx lr

This code is aslo correct:
    typedef struct unaligned_struct {
      int a;
      int b;
    } __attribute((__packed__));

    int unalignedTest (struct unaligned_struct *x)
    {
      return x->a + x->b;
    }

Thanks for keeping us updating with the solution to your problem. Much appreciated!