On Wednesday 27 May 2009 16:20:16 Nathan Wharton wrote:

On Tue, May 26, 2009 at 5:13 PM, Sven Eckelmann sven.eckelmann@gmx.de

wrote:

...

========================================= #include <stdio.h> #include <stdlib.h>

#define x_moved(pos) ((int*)&x[pos])[0] static const int value1 = 0x01234567; static const int value2 = 0x89abcdef;

int main() { volatile char *x = (char*)malloc(sizeof(int) * 2); x_moved(0) = value1; x_moved(2) = value2;

   if (x_moved(2) != value2) {
           printf("ERROR Value: ");
   } else {
           printf("Value: ");
   }
   printf("%x %x\n", x_moved(0) , x_moved(2));

   free(x);
   return 0;

}

This results in: ERROR Value: 89abcdef cdef89ab

Thanks. This is completely unexpecting for a kernel with alignment trap. The expected result is "Value: 12389ab 89abcdef". Can you check the value of /proc/cpu/alignment ? I will look further at it this evening.

Regards, Sven