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Add syscall functions #116

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Add syscall functions #116

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2 changes: 2 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@
#[cfg(feature = "std")]
pub use std::os::raw as ctypes;

pub mod syscall;

#[cfg(all(not(feature = "std"), feature = "no_std"))]
pub mod ctypes {
// The signedness of `char` is platform-specific, and we have to match
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259 changes: 259 additions & 0 deletions src/syscall/aarch64.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,259 @@
//! aarch64 Linux system calls.

use super::Reg;
use core::arch::asm;

#[cfg(target_pointer_width = "32")]
compile_error!("arm64-ilp32 is not supported yet");

#[inline(always)]
pub unsafe fn syscall0_readonly<R: From<Reg>>(nr: u32) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
lateout("x0") r0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall1<R: From<Reg>>(nr: u32, a0: impl Into<Reg>) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall1_readonly<R: From<Reg>>(nr: u32, a0: impl Into<Reg>) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall1_noreturn<R: From<Reg>>(nr: u32, a0: impl Into<Reg>) -> ! {
asm!(
"svc 0",
in("x8") nr,
in("x0") a0.into().0,
options(nostack, noreturn)
)
}

#[inline(always)]
pub unsafe fn syscall2<R: From<Reg>>(nr: u32, a0: impl Into<Reg>, a1: impl Into<Reg>) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall2_readonly<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall3<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall3_readonly<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall4<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall4_readonly<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall5<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
a4: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
in("x4") a4.into().0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall5_readonly<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
a4: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
in("x4") a4.into().0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall6<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
a4: impl Into<Reg>,
a5: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
in("x4") a4.into().0,
in("x5") a5.into().0,
options(nostack, preserves_flags)
);
R::from(Reg(r0))
}

#[inline(always)]
pub unsafe fn syscall6_readonly<R: From<Reg>>(
nr: u32,
a0: impl Into<Reg>,
a1: impl Into<Reg>,
a2: impl Into<Reg>,
a3: impl Into<Reg>,
a4: impl Into<Reg>,
a5: impl Into<Reg>,
) -> R {
let r0;
asm!(
"svc 0",
in("x8") nr,
inlateout("x0") a0.into().0 => r0,
in("x1") a1.into().0,
in("x2") a2.into().0,
in("x3") a3.into().0,
in("x4") a4.into().0,
in("x5") a5.into().0,
options(nostack, preserves_flags, readonly)
);
R::from(Reg(r0))
}
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