summaryrefslogtreecommitdiffstats
path: root/vendor/rustix/src/mm/userfaultfd.rs
blob: 201d54772d478e0bb4f8496f6a027b8fd4874128 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
//! The Linux `userfaultfd` API.
//!
//! # Safety
//!
//! Calling `userfaultfd` is safe, but the returned file descriptor lets users
//! observe and manipulate process memory in magical ways.
#![allow(unsafe_code)]

use crate::fd::OwnedFd;
use crate::{backend, io};

pub use backend::mm::types::UserfaultfdFlags;

/// `userfaultfd(flags)`
///
/// # Safety
///
/// The call itself is safe, but the returned file descriptor lets users
/// observe and manipulate process memory in magical ways.
///
/// # References
///  - [Linux]
///  - [Linux userfaultfd]
///
/// [Linux]: https://man7.org/linux/man-pages/man2/userfaultfd.2.html
/// [Linux userfaultfd]: https://www.kernel.org/doc/Documentation/vm/userfaultfd.txt
#[inline]
pub unsafe fn userfaultfd(flags: UserfaultfdFlags) -> io::Result<OwnedFd> {
    backend::mm::syscalls::userfaultfd(flags)
}