1 //! System bindings for the Fortanix SGX platform
3 //! This module contains the facade (aka platform-specific) implementations of
4 //! OS level functionality for Fortanix SGX.
5 #![deny(unsafe_op_in_unsafe_fn)]
7 use crate::io::ErrorKind;
8 use crate::os::raw::c_char;
9 use crate::sync::atomic::{AtomicBool, Ordering};
21 #[path = "../unsupported/fs.rs"]
23 #[path = "../unsupported/io.rs"]
30 #[path = "../unsupported/pipe.rs"]
32 #[path = "../unsupported/process.rs"]
35 pub mod stack_overflow;
38 pub mod thread_local_key;
41 pub use crate::sys_common::os_str_bytes as os_str;
46 /// This function is used to implement functionality that simply doesn't exist.
47 /// Programs relying on this functionality will need to deal with the error.
48 pub fn unsupported<T>() -> crate::io::Result<T> {
49 Err(unsupported_err())
52 pub fn unsupported_err() -> crate::io::Error {
53 crate::io::Error::new_const(ErrorKind::Other, &"operation not supported on SGX yet")
56 /// This function is used to implement various functions that doesn't exist,
57 /// but the lack of which might not be reason for error. If no error is
58 /// returned, the program might very well be able to function normally. This is
59 /// what happens when `SGX_INEFFECTIVE_ERROR` is set to `true`. If it is
60 /// `false`, the behavior is the same as `unsupported`.
61 pub fn sgx_ineffective<T>(v: T) -> crate::io::Result<T> {
62 static SGX_INEFFECTIVE_ERROR: AtomicBool = AtomicBool::new(false);
63 if SGX_INEFFECTIVE_ERROR.load(Ordering::Relaxed) {
64 Err(crate::io::Error::new_const(
66 &"operation can't be trusted to have any effect on SGX",
73 pub fn decode_error_kind(code: i32) -> ErrorKind {
74 use fortanix_sgx_abi::Error;
76 // FIXME: not sure how to make sure all variants of Error are covered
77 if code == Error::NotFound as _ {
79 } else if code == Error::PermissionDenied as _ {
80 ErrorKind::PermissionDenied
81 } else if code == Error::ConnectionRefused as _ {
82 ErrorKind::ConnectionRefused
83 } else if code == Error::ConnectionReset as _ {
84 ErrorKind::ConnectionReset
85 } else if code == Error::ConnectionAborted as _ {
86 ErrorKind::ConnectionAborted
87 } else if code == Error::NotConnected as _ {
88 ErrorKind::NotConnected
89 } else if code == Error::AddrInUse as _ {
91 } else if code == Error::AddrNotAvailable as _ {
92 ErrorKind::AddrNotAvailable
93 } else if code == Error::BrokenPipe as _ {
95 } else if code == Error::AlreadyExists as _ {
96 ErrorKind::AlreadyExists
97 } else if code == Error::WouldBlock as _ {
99 } else if code == Error::InvalidInput as _ {
100 ErrorKind::InvalidInput
101 } else if code == Error::InvalidData as _ {
102 ErrorKind::InvalidData
103 } else if code == Error::TimedOut as _ {
105 } else if code == Error::WriteZero as _ {
107 } else if code == Error::Interrupted as _ {
108 ErrorKind::Interrupted
109 } else if code == Error::Other as _ {
111 } else if code == Error::UnexpectedEof as _ {
112 ErrorKind::UnexpectedEof
118 // This enum is used as the storage for a bunch of types which can't actually
120 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
123 pub unsafe fn strlen(mut s: *const c_char) -> usize {
125 while unsafe { *s } != 0 {
127 s = unsafe { s.offset(1) };
132 pub fn abort_internal() -> ! {
133 abi::usercalls::exit(true)
136 // This function is needed by the panic runtime. The symbol is named in
137 // pre-link args for the target specification, so keep that in sync.
140 // NB. used by both libunwind and libpanic_abort
141 pub extern "C" fn __rust_abort() {
146 pub fn rdrand64() -> u64 {
148 let mut ret: u64 = 0;
150 if crate::arch::x86_64::_rdrand64_step(&mut ret) == 1 {
154 rtabort!("Failed to obtain random data");
159 pub fn hashmap_random_keys() -> (u64, u64) {
160 (self::rand::rdrand64(), self::rand::rdrand64())
163 pub use crate::sys_common::{AsInner, FromInner, IntoInner};
165 pub trait TryIntoInner<Inner>: Sized {
166 fn try_into_inner(self) -> Result<Inner, Self>;