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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/rustix/src/backend/linux_raw/arch/mod.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
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diff --git a/vendor/rustix/src/backend/linux_raw/arch/mod.rs b/vendor/rustix/src/backend/linux_raw/arch/mod.rs
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-//! Architecture-specific syscall code.
-//!
-//! This module also has a `choose` submodule which chooses a scheme and is
-//! what most of the `rustix` syscalls use.
-//!
-//! Compilers should really have intrinsics for making system calls. They're
-//! much like regular calls, with custom calling conventions, and calling
-//! conventions are otherwise the compiler's job. But for now, use inline asm.
-//!
-//! The calling conventions for Linux syscalls are [documented here].
-//!
-//! [documented here]: https://man7.org/linux/man-pages/man2/syscall.2.html
-//!
-//! # Safety
-//!
-//! This contains the inline `asm` statements performing the syscall
-//! instructions.
-
-#![allow(unsafe_code)]
-#![cfg_attr(not(feature = "all-apis"), allow(unused_imports))]
-// We'll use as many arguments as syscalls need.
-#![allow(clippy::too_many_arguments)]
-
-// These functions always use the machine's syscall instruction, even when it
-// isn't the fastest option available.
-#[cfg_attr(target_arch = "aarch64", path = "aarch64.rs")]
-#[cfg_attr(all(target_arch = "arm", not(thumb_mode)), path = "arm.rs")]
-#[cfg_attr(all(target_arch = "arm", thumb_mode), path = "thumb.rs")]
-#[cfg_attr(target_arch = "mips", path = "mips.rs")]
-#[cfg_attr(target_arch = "mips32r6", path = "mips32r6.rs")]
-#[cfg_attr(target_arch = "mips64", path = "mips64.rs")]
-#[cfg_attr(target_arch = "mips64r6", path = "mips64r6.rs")]
-#[cfg_attr(target_arch = "powerpc64", path = "powerpc64.rs")]
-#[cfg_attr(target_arch = "riscv64", path = "riscv64.rs")]
-#[cfg_attr(target_arch = "x86", path = "x86.rs")]
-#[cfg_attr(target_arch = "x86_64", path = "x86_64.rs")]
-pub(in crate::backend) mod asm;
-
-// On most architectures, the architecture syscall instruction is fast, so use
-// it directly.
-#[cfg(any(
- target_arch = "arm",
- target_arch = "aarch64",
- target_arch = "mips",
- target_arch = "mips32r6",
- target_arch = "mips64",
- target_arch = "mips64r6",
- target_arch = "powerpc64",
- target_arch = "riscv64",
- target_arch = "x86_64",
-))]
-pub(in crate::backend) use self::asm as choose;
-
-// On 32-bit x86, use vDSO wrappers for all syscalls. We could use the
-// architecture syscall instruction (`int 0x80`), but the vDSO kernel_vsyscall
-// mechanism is much faster.
-#[cfg(target_arch = "x86")]
-pub(in crate::backend) use super::vdso_wrappers::x86_via_vdso as choose;
-
-// This would be the code for always using `int 0x80` on 32-bit x86.
-//#[cfg(target_arch = "x86")]
-//pub(in crate::backend) use self::asm as choose;
-
-// Macros for invoking system calls.
-//
-// These factor out:
-// - Calling `nr` on the syscall number to convert it into `SyscallNumber`.
-// - Calling `.into()` on each of the arguments to convert them into `ArgReg`.
-// - Qualifying the `syscall*` and `__NR_*` identifiers.
-// - Counting the number of arguments.
-macro_rules! syscall {
- ($nr:ident) => {
- $crate::backend::arch::choose::syscall0($crate::backend::reg::nr(
- linux_raw_sys::general::$nr,
- ))
- };
-
- ($nr:ident, $a0:expr) => {
- $crate::backend::arch::choose::syscall1(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr) => {
- $crate::backend::arch::choose::syscall2(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
- $crate::backend::arch::choose::syscall3(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
- $crate::backend::arch::choose::syscall4(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
- $crate::backend::arch::choose::syscall5(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
- $crate::backend::arch::choose::syscall6(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
- $crate::backend::arch::choose::syscall7(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- $a6.into(),
- )
- };
-}
-
-// Macro to invoke a syscall that always uses direct assembly, rather than the
-// vDSO. Useful when still finding the vDSO.
-#[allow(unused_macros)]
-macro_rules! syscall_always_asm {
- ($nr:ident) => {
- $crate::backend::arch::asm::syscall0($crate::backend::reg::nr(linux_raw_sys::general::$nr))
- };
-
- ($nr:ident, $a0:expr) => {
- $crate::backend::arch::asm::syscall1(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr) => {
- $crate::backend::arch::asm::syscall2(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
- $crate::backend::arch::asm::syscall3(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
- $crate::backend::arch::asm::syscall4(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
- $crate::backend::arch::asm::syscall5(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
- $crate::backend::arch::asm::syscall6(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
- $crate::backend::arch::asm::syscall7(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- $a6.into(),
- )
- };
-}
-
-/// Like `syscall`, but adds the `readonly` attribute to the inline asm, which
-/// indicates that the syscall does not mutate any memory.
-macro_rules! syscall_readonly {
- ($nr:ident) => {
- $crate::backend::arch::choose::syscall0_readonly($crate::backend::reg::nr(
- linux_raw_sys::general::$nr,
- ))
- };
-
- ($nr:ident, $a0:expr) => {
- $crate::backend::arch::choose::syscall1_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr) => {
- $crate::backend::arch::choose::syscall2_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
- $crate::backend::arch::choose::syscall3_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
- $crate::backend::arch::choose::syscall4_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
- $crate::backend::arch::choose::syscall5_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
- $crate::backend::arch::choose::syscall6_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- )
- };
-
- ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
- $crate::backend::arch::choose::syscall7_readonly(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- $a1.into(),
- $a2.into(),
- $a3.into(),
- $a4.into(),
- $a5.into(),
- $a6.into(),
- )
- };
-}
-
-/// Like `syscall`, but indicates that the syscall does not return.
-#[cfg(feature = "runtime")]
-macro_rules! syscall_noreturn {
- ($nr:ident, $a0:expr) => {
- $crate::backend::arch::choose::syscall1_noreturn(
- $crate::backend::reg::nr(linux_raw_sys::general::$nr),
- $a0.into(),
- )
- };
-}