priovec
priovec_t priovec; /* PCREAD, PCWRITE */
priovec_t priovec;
priovec.pio_base =
(void *)(uintptr_t)argp->priovec.pio_base;
priovec.pio_len = (size_t)argp->priovec.pio_len;
priovec.pio_offset = (off_t)
(uint32_t)argp->priovec.pio_offset;
error = pr_rdwr(p, rw, &priovec);
error = pr_rdwr(p, UIO_READ, &argp->priovec);
error = pr_rdwr(p, UIO_WRITE, &argp->priovec);
priovec32_t priovec; /* PCREAD, PCWRITE */