Listing 2. Example Program Containing Instruction Skip

void func(int a, int b)
{
 int * p; /* pointer to point return address */
 p = &b ; /* p points to the address of b */
 p -= 2 ; /* sub 8 bytes to from p (or &b) so */
          /* it points to the return address */
 printf("The return address is %x \n",*p); 
 (*p)+= 10; /* add 10 bytes to the return address 
             * to skip the num = 1 */
 printf("The new return address is %x \n",*p); 
}
main()
{
 int num;
 num = 0;
 func(1,2);
 num = 1;
 printf(" Num is now %d \n",num);
}