| use crate::cmp; |
| use crate::io::{Error as IoError, Result as IoResult, IoSlice, IoSliceMut}; |
| use crate::time::Duration; |
| |
| pub(crate) mod alloc; |
| #[macro_use] |
| pub(crate) mod raw; |
| |
| use self::raw::*; |
| |
| /// Usercall `read`. See the ABI documentation for more information. |
| /// |
| /// This will do a single `read` usercall and scatter the read data among |
| /// `bufs`. To read to a single buffer, just pass a slice of length one. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn read(fd: Fd, bufs: &mut [IoSliceMut<'_>]) -> IoResult<usize> { |
| unsafe { |
| let total_len = bufs.iter().fold(0usize, |sum, buf| sum.saturating_add(buf.len())); |
| let mut userbuf = alloc::User::<[u8]>::uninitialized(total_len); |
| let ret_len = raw::read(fd, userbuf.as_mut_ptr(), userbuf.len()).from_sgx_result()?; |
| let userbuf = &userbuf[..ret_len]; |
| let mut index = 0; |
| for buf in bufs { |
| let end = cmp::min(index + buf.len(), userbuf.len()); |
| if let Some(buflen) = end.checked_sub(index) { |
| userbuf[index..end].copy_to_enclave(&mut buf[..buflen]); |
| index += buf.len(); |
| } else { |
| break |
| } |
| } |
| Ok(userbuf.len()) |
| } |
| } |
| |
| /// Usercall `read_alloc`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn read_alloc(fd: Fd) -> IoResult<Vec<u8>> { |
| unsafe { |
| let userbuf = ByteBuffer { data: crate::ptr::null_mut(), len: 0 }; |
| let mut userbuf = alloc::User::new_from_enclave(&userbuf); |
| raw::read_alloc(fd, userbuf.as_raw_mut_ptr()).from_sgx_result()?; |
| Ok(userbuf.copy_user_buffer()) |
| } |
| } |
| |
| /// Usercall `write`. See the ABI documentation for more information. |
| /// |
| /// This will do a single `write` usercall and gather the written data from |
| /// `bufs`. To write from a single buffer, just pass a slice of length one. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn write(fd: Fd, bufs: &[IoSlice<'_>]) -> IoResult<usize> { |
| unsafe { |
| let total_len = bufs.iter().fold(0usize, |sum, buf| sum.saturating_add(buf.len())); |
| let mut userbuf = alloc::User::<[u8]>::uninitialized(total_len); |
| let mut index = 0; |
| for buf in bufs { |
| let end = cmp::min(index + buf.len(), userbuf.len()); |
| if let Some(buflen) = end.checked_sub(index) { |
| userbuf[index..end].copy_from_enclave(&buf[..buflen]); |
| index += buf.len(); |
| } else { |
| break |
| } |
| } |
| raw::write(fd, userbuf.as_ptr(), userbuf.len()).from_sgx_result() |
| } |
| } |
| |
| /// Usercall `flush`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn flush(fd: Fd) -> IoResult<()> { |
| unsafe { raw::flush(fd).from_sgx_result() } |
| } |
| |
| /// Usercall `close`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn close(fd: Fd) { |
| unsafe { raw::close(fd) } |
| } |
| |
| fn string_from_bytebuffer(buf: &alloc::UserRef<ByteBuffer>, usercall: &str, arg: &str) -> String { |
| String::from_utf8(buf.copy_user_buffer()) |
| .unwrap_or_else(|_| rtabort!("Usercall {}: expected {} to be valid UTF-8", usercall, arg)) |
| } |
| |
| /// Usercall `bind_stream`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn bind_stream(addr: &str) -> IoResult<(Fd, String)> { |
| unsafe { |
| let addr_user = alloc::User::new_from_enclave(addr.as_bytes()); |
| let mut local = alloc::User::<ByteBuffer>::uninitialized(); |
| let fd = raw::bind_stream( |
| addr_user.as_ptr(), |
| addr_user.len(), |
| local.as_raw_mut_ptr() |
| ).from_sgx_result()?; |
| let local = string_from_bytebuffer(&local, "bind_stream", "local_addr"); |
| Ok((fd, local)) |
| } |
| } |
| |
| /// Usercall `accept_stream`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn accept_stream(fd: Fd) -> IoResult<(Fd, String, String)> { |
| unsafe { |
| let mut bufs = alloc::User::<[ByteBuffer; 2]>::uninitialized(); |
| let mut buf_it = alloc::UserRef::iter_mut(&mut *bufs); // FIXME: can this be done |
| // without forcing coercion? |
| let (local, peer) = (buf_it.next().unwrap(), buf_it.next().unwrap()); |
| let fd = raw::accept_stream( |
| fd, |
| local.as_raw_mut_ptr(), |
| peer.as_raw_mut_ptr() |
| ).from_sgx_result()?; |
| let local = string_from_bytebuffer(&local, "accept_stream", "local_addr"); |
| let peer = string_from_bytebuffer(&peer, "accept_stream", "peer_addr"); |
| Ok((fd, local, peer)) |
| } |
| } |
| |
| /// Usercall `connect_stream`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn connect_stream(addr: &str) -> IoResult<(Fd, String, String)> { |
| unsafe { |
| let addr_user = alloc::User::new_from_enclave(addr.as_bytes()); |
| let mut bufs = alloc::User::<[ByteBuffer; 2]>::uninitialized(); |
| let mut buf_it = alloc::UserRef::iter_mut(&mut *bufs); // FIXME: can this be done |
| // without forcing coercion? |
| let (local, peer) = (buf_it.next().unwrap(), buf_it.next().unwrap()); |
| let fd = raw::connect_stream( |
| addr_user.as_ptr(), |
| addr_user.len(), |
| local.as_raw_mut_ptr(), |
| peer.as_raw_mut_ptr() |
| ).from_sgx_result()?; |
| let local = string_from_bytebuffer(&local, "connect_stream", "local_addr"); |
| let peer = string_from_bytebuffer(&peer, "connect_stream", "peer_addr"); |
| Ok((fd, local, peer)) |
| } |
| } |
| |
| /// Usercall `launch_thread`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub unsafe fn launch_thread() -> IoResult<()> { |
| raw::launch_thread().from_sgx_result() |
| } |
| |
| /// Usercall `exit`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn exit(panic: bool) -> ! { |
| unsafe { raw::exit(panic) } |
| } |
| |
| /// Usercall `wait`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn wait(event_mask: u64, timeout: u64) -> IoResult<u64> { |
| unsafe { raw::wait(event_mask, timeout).from_sgx_result() } |
| } |
| |
| /// Usercall `send`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn send(event_set: u64, tcs: Option<Tcs>) -> IoResult<()> { |
| unsafe { raw::send(event_set, tcs).from_sgx_result() } |
| } |
| |
| /// Usercall `insecure_time`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn insecure_time() -> Duration { |
| let t = unsafe { raw::insecure_time() }; |
| Duration::new(t / 1_000_000_000, (t % 1_000_000_000) as _) |
| } |
| |
| /// Usercall `alloc`. See the ABI documentation for more information. |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| pub fn alloc(size: usize, alignment: usize) -> IoResult<*mut u8> { |
| unsafe { raw::alloc(size, alignment).from_sgx_result() } |
| } |
| |
| #[unstable(feature = "sgx_platform", issue = "56975")] |
| #[doc(inline)] |
| pub use self::raw::free; |
| |
| fn check_os_error(err: Result) -> i32 { |
| // FIXME: not sure how to make sure all variants of Error are covered |
| if err == Error::NotFound as _ || |
| err == Error::PermissionDenied as _ || |
| err == Error::ConnectionRefused as _ || |
| err == Error::ConnectionReset as _ || |
| err == Error::ConnectionAborted as _ || |
| err == Error::NotConnected as _ || |
| err == Error::AddrInUse as _ || |
| err == Error::AddrNotAvailable as _ || |
| err == Error::BrokenPipe as _ || |
| err == Error::AlreadyExists as _ || |
| err == Error::WouldBlock as _ || |
| err == Error::InvalidInput as _ || |
| err == Error::InvalidData as _ || |
| err == Error::TimedOut as _ || |
| err == Error::WriteZero as _ || |
| err == Error::Interrupted as _ || |
| err == Error::Other as _ || |
| err == Error::UnexpectedEof as _ || |
| ((Error::UserRangeStart as _)..=(Error::UserRangeEnd as _)).contains(&err) |
| { |
| err |
| } else { |
| rtabort!("Usercall: returned invalid error value {}", err) |
| } |
| } |
| |
| trait FromSgxResult { |
| type Return; |
| |
| fn from_sgx_result(self) -> IoResult<Self::Return>; |
| } |
| |
| impl<T> FromSgxResult for (Result, T) { |
| type Return = T; |
| |
| fn from_sgx_result(self) -> IoResult<Self::Return> { |
| if self.0 == RESULT_SUCCESS { |
| Ok(self.1) |
| } else { |
| Err(IoError::from_raw_os_error(check_os_error(self.0))) |
| } |
| } |
| } |
| |
| impl FromSgxResult for Result { |
| type Return = (); |
| |
| fn from_sgx_result(self) -> IoResult<Self::Return> { |
| if self == RESULT_SUCCESS { |
| Ok(()) |
| } else { |
| Err(IoError::from_raw_os_error(check_os_error(self))) |
| } |
| } |
| } |
