1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/rustix/src/prctl.rs b/vendor/rustix/src/prctl.rs
new file mode 100644
index 000000000..49cb062d6
--- /dev/null
+++ b/vendor/rustix/src/prctl.rs
@@ -0,0 +1,68 @@
+//! Helper functions for `prctl` syscalls.
+
+#![allow(unsafe_code)]
+
+use crate::backend::c::{c_int, c_void};
+use crate::backend::prctl::syscalls;
+use crate::io;
+use crate::utils::as_mut_ptr;
+use bitflags::bitflags;
+use core::mem::MaybeUninit;
+use core::ptr::null_mut;
+
+bitflags! {
+    /// `PR_PAC_AP*`.
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PointerAuthenticationKeys: u32 {
+        /// `PR_PAC_APIAKEY`—Instruction authentication key `A`.
+        const INSTRUCTION_AUTHENTICATION_KEY_A = linux_raw_sys::prctl::PR_PAC_APIAKEY;
+        /// `PR_PAC_APIBKEY`—Instruction authentication key `B`.
+        const INSTRUCTION_AUTHENTICATION_KEY_B = linux_raw_sys::prctl::PR_PAC_APIBKEY;
+        /// `PR_PAC_APDAKEY`—Data authentication key `A`.
+        const DATA_AUTHENTICATION_KEY_A = linux_raw_sys::prctl::PR_PAC_APDAKEY;
+        /// `PR_PAC_APDBKEY`—Data authentication key `B`.
+        const DATA_AUTHENTICATION_KEY_B = linux_raw_sys::prctl::PR_PAC_APDBKEY;
+        /// `PR_PAC_APGAKEY`—Generic authentication `A` key.
+        const GENERIC_AUTHENTICATION_KEY_A = linux_raw_sys::prctl::PR_PAC_APGAKEY;
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn prctl_1arg(option: c_int) -> io::Result<c_int> {
+    const NULL: *mut c_void = null_mut();
+    syscalls::prctl(option, NULL, NULL, NULL, NULL)
+}
+
+#[inline]
+pub(crate) unsafe fn prctl_2args(option: c_int, arg2: *mut c_void) -> io::Result<c_int> {
+    const NULL: *mut c_void = null_mut();
+    syscalls::prctl(option, arg2, NULL, NULL, NULL)
+}
+
+#[inline]
+pub(crate) unsafe fn prctl_3args(
+    option: c_int,
+    arg2: *mut c_void,
+    arg3: *mut c_void,
+) -> io::Result<c_int> {
+    syscalls::prctl(option, arg2, arg3, null_mut(), null_mut())
+}
+
+#[inline]
+pub(crate) unsafe fn prctl_get_at_arg2_optional<P>(option: i32) -> io::Result<P> {
+    let mut value: MaybeUninit<P> = MaybeUninit::uninit();
+    prctl_2args(option, value.as_mut_ptr().cast())?;
+    Ok(value.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn prctl_get_at_arg2<P, T>(option: i32) -> io::Result<T>
+where
+    P: Default,
+    T: TryFrom<P, Error = io::Errno>,
+{
+    let mut value: P = Default::default();
+    prctl_2args(option, as_mut_ptr(&mut value).cast())?;
+    TryFrom::try_from(value)
+}