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};
30 pub mod stack_overflow;
33 pub mod thread_local_key;
36 pub use crate::sys_common::os_str_bytes as os_str;
41 /// This function is used to implement functionality that simply doesn't exist.
42 /// Programs relying on this functionality will need to deal with the error.
43 pub fn unsupported<T>() -> crate::io::Result<T> {
44 Err(unsupported_err())
47 pub fn unsupported_err() -> crate::io::Error {
48 crate::io::Error::new(ErrorKind::Other, "operation not supported on SGX yet")
51 /// This function is used to implement various functions that doesn't exist,
52 /// but the lack of which might not be reason for error. If no error is
53 /// returned, the program might very well be able to function normally. This is
54 /// what happens when `SGX_INEFFECTIVE_ERROR` is set to `true`. If it is
55 /// `false`, the behavior is the same as `unsupported`.
56 pub fn sgx_ineffective<T>(v: T) -> crate::io::Result<T> {
57 static SGX_INEFFECTIVE_ERROR: AtomicBool = AtomicBool::new(false);
58 if SGX_INEFFECTIVE_ERROR.load(Ordering::Relaxed) {
59 Err(crate::io::Error::new(
61 "operation can't be trusted to have any effect on SGX",
68 pub fn decode_error_kind(code: i32) -> ErrorKind {
69 use fortanix_sgx_abi::Error;
71 // FIXME: not sure how to make sure all variants of Error are covered
72 if code == Error::NotFound as _ {
74 } else if code == Error::PermissionDenied as _ {
75 ErrorKind::PermissionDenied
76 } else if code == Error::ConnectionRefused as _ {
77 ErrorKind::ConnectionRefused
78 } else if code == Error::ConnectionReset as _ {
79 ErrorKind::ConnectionReset
80 } else if code == Error::ConnectionAborted as _ {
81 ErrorKind::ConnectionAborted
82 } else if code == Error::NotConnected as _ {
83 ErrorKind::NotConnected
84 } else if code == Error::AddrInUse as _ {
86 } else if code == Error::AddrNotAvailable as _ {
87 ErrorKind::AddrNotAvailable
88 } else if code == Error::BrokenPipe as _ {
90 } else if code == Error::AlreadyExists as _ {
91 ErrorKind::AlreadyExists
92 } else if code == Error::WouldBlock as _ {
94 } else if code == Error::InvalidInput as _ {
95 ErrorKind::InvalidInput
96 } else if code == Error::InvalidData as _ {
97 ErrorKind::InvalidData
98 } else if code == Error::TimedOut as _ {
100 } else if code == Error::WriteZero as _ {
102 } else if code == Error::Interrupted as _ {
103 ErrorKind::Interrupted
104 } else if code == Error::Other as _ {
106 } else if code == Error::UnexpectedEof as _ {
107 ErrorKind::UnexpectedEof
113 // This enum is used as the storage for a bunch of types which can't actually
115 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
118 pub unsafe fn strlen(mut s: *const c_char) -> usize {
127 pub fn abort_internal() -> ! {
128 abi::usercalls::exit(true)
131 // This function is needed by the panic runtime. The symbol is named in
132 // pre-link args for the target specification, so keep that in sync.
135 // NB. used by both libunwind and libpanic_abort
136 pub extern "C" fn __rust_abort() {
141 pub fn rdrand64() -> u64 {
143 let mut ret: u64 = 0;
145 if crate::arch::x86_64::_rdrand64_step(&mut ret) == 1 {
149 rtabort!("Failed to obtain random data");
154 pub fn hashmap_random_keys() -> (u64, u64) {
155 (self::rand::rdrand64(), self::rand::rdrand64())
158 pub use crate::sys_common::{AsInner, FromInner, IntoInner};
160 pub trait TryIntoInner<Inner>: Sized {
161 fn try_into_inner(self) -> Result<Inner, Self>;