Pidin and Semaphores

When using the pidin command, I can see some threads of my process blocked
on a semaphore (status SEM), On the right I can see a value corresponding
(it seems) to the semaphore. But I don’t know what is this value, on a x86
computer it seems to be the address of the sem_t structure, but on my ppc
board (some application) it is not. Who can help me because I want to locate
which semaphore the threads are blocked on ?
Best Regards,