diff options
Diffstat (limited to 'vendor/rustix/src/backend/linux_raw/arch/mod.rs')
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/arch/mod.rs | 317 |
1 files changed, 0 insertions, 317 deletions
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mod.rs b/vendor/rustix/src/backend/linux_raw/arch/mod.rs deleted file mode 100644 index ac9e25f..0000000 --- a/vendor/rustix/src/backend/linux_raw/arch/mod.rs +++ /dev/null @@ -1,317 +0,0 @@ -//! 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(), - ) - }; -} |