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use crate::io::{Error as IoError, Result as IoResult};
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.
#[unstable(feature = "sgx_platform", issue = "56975")]
pub fn read(fd: Fd, buf: &mut [u8]) -> IoResult<usize> {
unsafe {
let mut userbuf = alloc::User::<[u8]>::uninitialized(buf.len());
let len = raw::read(fd, userbuf.as_mut_ptr(), userbuf.len()).from_sgx_result()?;
userbuf[..len].copy_to_enclave(&mut buf[..len]);
Ok(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.
#[unstable(feature = "sgx_platform", issue = "56975")]
pub fn write(fd: Fd, buf: &[u8]) -> IoResult<usize> {
unsafe {
let userbuf = alloc::User::new_from_enclave(buf);
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)))
}
}
}
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