ldc_mem_map
status = ldc_mem_map(task->mhdl, request->cookie, request->ncookies,
rv = ldc_mem_map(ldcp->tx_data_handle, emsg->data_cookie,
rv = ldc_mem_map(dp->data_handle, emsg->data_cookie,
int ldc_mem_map(ldc_mem_handle_t mhandle, ldc_mem_cookie_t *cookie,