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.
6 use crate::io::ErrorKind;
7 use crate::os::raw::c_char;
8 use crate::sync::atomic::{AtomicBool, Ordering};
15 #[cfg(feature = "backtrace")]
33 pub mod stack_overflow;
43 /// This function is used to implement functionality that simply doesn't exist.
44 /// Programs relying on this functionality will need to deal with the error.
45 pub fn unsupported<T>() -> crate::io::Result<T> {
46 Err(unsupported_err())
49 pub fn unsupported_err() -> crate::io::Error {
50 crate::io::Error::new(ErrorKind::Other,
51 "operation not supported on SGX yet")
54 /// This function is used to implement various functions that doesn't exist,
55 /// but the lack of which might not be reason for error. If no error is
56 /// returned, the program might very well be able to function normally. This is
57 /// what happens when `SGX_INEFFECTIVE_ERROR` is set to `true`. If it is
58 /// `false`, the behavior is the same as `unsupported`.
59 pub fn sgx_ineffective<T>(v: T) -> crate::io::Result<T> {
60 static SGX_INEFFECTIVE_ERROR: AtomicBool = AtomicBool::new(false);
61 if SGX_INEFFECTIVE_ERROR.load(Ordering::Relaxed) {
62 Err(crate::io::Error::new(ErrorKind::Other,
63 "operation can't be trusted to have any effect on SGX"))
69 pub fn decode_error_kind(code: i32) -> ErrorKind {
70 use fortanix_sgx_abi::Error;
72 // FIXME: not sure how to make sure all variants of Error are covered
73 if code == Error::NotFound as _ {
75 } else if code == Error::PermissionDenied as _ {
76 ErrorKind::PermissionDenied
77 } else if code == Error::ConnectionRefused as _ {
78 ErrorKind::ConnectionRefused
79 } else if code == Error::ConnectionReset as _ {
80 ErrorKind::ConnectionReset
81 } else if code == Error::ConnectionAborted as _ {
82 ErrorKind::ConnectionAborted
83 } else if code == Error::NotConnected as _ {
84 ErrorKind::NotConnected
85 } else if code == Error::AddrInUse as _ {
87 } else if code == Error::AddrNotAvailable as _ {
88 ErrorKind::AddrNotAvailable
89 } else if code == Error::BrokenPipe as _ {
91 } else if code == Error::AlreadyExists as _ {
92 ErrorKind::AlreadyExists
93 } else if code == Error::WouldBlock as _ {
95 } else if code == Error::InvalidInput as _ {
96 ErrorKind::InvalidInput
97 } else if code == Error::InvalidData as _ {
98 ErrorKind::InvalidData
99 } else if code == Error::TimedOut as _ {
101 } else if code == Error::WriteZero as _ {
103 } else if code == Error::Interrupted as _ {
104 ErrorKind::Interrupted
105 } else if code == Error::Other as _ {
107 } else if code == Error::UnexpectedEof as _ {
108 ErrorKind::UnexpectedEof
114 // This enum is used as the storage for a bunch of types which can't actually
116 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
119 pub unsafe fn strlen(mut s: *const c_char) -> usize {
128 pub unsafe fn abort_internal() -> ! {
129 abi::usercalls::exit(true)
132 pub fn hashmap_random_keys() -> (u64, u64) {
133 fn rdrand64() -> u64 {
135 let mut ret: u64 = crate::mem::uninitialized();
137 if crate::arch::x86_64::_rdrand64_step(&mut ret) == 1 {
141 panic!("Failed to obtain random data");
144 (rdrand64(), rdrand64())
147 pub use crate::sys_common::{AsInner, FromInner, IntoInner};
149 pub trait TryIntoInner<Inner>: Sized {
150 fn try_into_inner(self) -> Result<Inner, Self>;