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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs')
-rw-r--r-- | vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs b/vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs new file mode 100644 index 000000000..49a29b2a2 --- /dev/null +++ b/vendor/rustix/src/imp/linux_raw/runtime/syscalls.rs @@ -0,0 +1,104 @@ +//! linux_raw syscalls supporting `rustix::runtime`. +//! +//! # Safety +//! +//! See the `rustix::imp` module documentation for details. +#![allow(unsafe_code)] +#![allow(clippy::undocumented_unsafe_blocks)] + +use super::super::c; +#[cfg(target_arch = "x86")] +use super::super::conv::by_mut; +use super::super::conv::{c_int, c_uint, ret, ret_c_uint, ret_error, ret_usize_infallible, zero}; +use crate::fd::BorrowedFd; +use crate::ffi::CStr; +use crate::fs::AtFlags; +use crate::io; +use crate::process::{Pid, RawNonZeroPid}; +use linux_raw_sys::general::{__kernel_pid_t, PR_SET_NAME, SIGCHLD}; +#[cfg(target_arch = "x86_64")] +use {super::super::conv::ret_infallible, linux_raw_sys::general::ARCH_SET_FS}; + +#[inline] +pub(crate) unsafe fn fork() -> io::Result<Option<Pid>> { + let pid = ret_c_uint(syscall_readonly!( + __NR_clone, + c_uint(SIGCHLD), + zero(), + zero(), + zero(), + zero() + ))?; + Ok(Pid::from_raw(pid)) +} + +pub(crate) unsafe fn execveat( + dirfd: BorrowedFd<'_>, + path: &CStr, + args: *const *const u8, + env_vars: *const *const u8, + flags: AtFlags, +) -> io::Errno { + ret_error(syscall_readonly!( + __NR_execveat, + dirfd, + path, + args, + env_vars, + flags + )) +} + +pub(crate) unsafe fn execve( + path: &CStr, + args: *const *const u8, + env_vars: *const *const u8, +) -> io::Errno { + ret_error(syscall_readonly!(__NR_execve, path, args, env_vars)) +} + +pub(crate) mod tls { + #[cfg(target_arch = "x86")] + use super::super::tls::UserDesc; + use super::*; + + #[cfg(target_arch = "x86")] + #[inline] + pub(crate) unsafe fn set_thread_area(u_info: &mut UserDesc) -> io::Result<()> { + ret(syscall!(__NR_set_thread_area, by_mut(u_info))) + } + + #[cfg(target_arch = "arm")] + #[inline] + pub(crate) unsafe fn arm_set_tls(data: *mut c::c_void) -> io::Result<()> { + ret(syscall_readonly!(__ARM_NR_set_tls, data)) + } + + #[cfg(target_arch = "x86_64")] + #[inline] + pub(crate) unsafe fn set_fs(data: *mut c::c_void) { + ret_infallible(syscall_readonly!( + __NR_arch_prctl, + c_uint(ARCH_SET_FS), + data + )) + } + + #[inline] + pub(crate) unsafe fn set_tid_address(data: *mut c::c_void) -> Pid { + let tid: i32 = + ret_usize_infallible(syscall_readonly!(__NR_set_tid_address, data)) as __kernel_pid_t; + debug_assert_ne!(tid, 0); + Pid::from_raw_nonzero(RawNonZeroPid::new_unchecked(tid as u32)) + } + + #[inline] + pub(crate) unsafe fn set_thread_name(name: &CStr) -> io::Result<()> { + ret(syscall_readonly!(__NR_prctl, c_uint(PR_SET_NAME), name)) + } + + #[inline] + pub(crate) fn exit_thread(code: c::c_int) -> ! { + unsafe { syscall_noreturn!(__NR_exit, c_int(code)) } + } +} |