GetReadWriterAt returns a ReadWriterAt that reads from / writes to the given host file descriptor, starting at the given offset and using the given preadv2(2)/pwritev2(2) flags.

Preadv2 reads up to dsts.NumBytes() bytes from host file descriptor fd into dsts.

PutReadWriterAt releases a ReadWriterAt returned by a previous call to GetReadWriterAt that is no longer in use.

Pwritev2 writes up to srcs.NumBytes() from srcs into host file descriptor fd.

UIO_MAXIOV.

UIO_MAXIOV.

ReadWriterAt implements safemem.Reader and safemem.Writer by reading from and writing to a host file descriptor respectively.