_IOWR              42 src/runtime/hexagon_remote/host_malloc.cpp #define ION_IOC_ALLOC _IOWR('I', 0, ion_allocation_data)
_IOWR              43 src/runtime/hexagon_remote/host_malloc.cpp #define ION_IOC_FREE _IOWR('I', 1, ion_handle_data)
_IOWR              44 src/runtime/hexagon_remote/host_malloc.cpp #define ION_IOC_MAP _IOWR('I', 2, ion_fd_data)