Method read

core/src/mm.rs:385–395

(&mut self, start: usize, buf: &mut [MaybeUninit<u8>])

    }

    fn read(&mut self, start: usize, buf: &mut [MaybeUninit<u8>]) -> VmResult {
        check_access(start, buf.len())?;
        let failed_at = access_user_memory(|| unsafe {
            user_copy(buf.as_mut_ptr() as *mut _, start as _, buf.len())
        });
        if unlikely(failed_at != 0) {
            Err(VmError::AccessDenied)
        } else {
            Ok(())
        }
    }

    fn write(&mut self, start: usize, buf: &[u8]) -> VmResult {
        check_access(start, buf.len())?;