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//! riscv64 Linux system calls.
use crate::backend::reg::{
ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
};
use core::arch::asm;
#[inline]
pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
lateout("a0") r0,
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall1_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
asm!(
"ecall",
in("a7") nr.to_asm(),
in("a0") a0.to_asm(),
options(nostack, noreturn)
);
}
#[inline]
pub(in crate::backend) unsafe fn syscall2(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall2_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall3(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall3_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall4(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall4_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall5(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
a4: ArgReg<'_, A4>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
in("a4") a4.to_asm(),
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall5_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
a4: ArgReg<'_, A4>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
in("a4") a4.to_asm(),
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall6(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
a4: ArgReg<'_, A4>,
a5: ArgReg<'_, A5>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
in("a4") a4.to_asm(),
in("a5") a5.to_asm(),
options(nostack, preserves_flags)
);
FromAsm::from_asm(r0)
}
#[inline]
pub(in crate::backend) unsafe fn syscall6_readonly(
nr: SyscallNumber<'_>,
a0: ArgReg<'_, A0>,
a1: ArgReg<'_, A1>,
a2: ArgReg<'_, A2>,
a3: ArgReg<'_, A3>,
a4: ArgReg<'_, A4>,
a5: ArgReg<'_, A5>,
) -> RetReg<R0> {
let r0;
asm!(
"ecall",
in("a7") nr.to_asm(),
inlateout("a0") a0.to_asm() => r0,
in("a1") a1.to_asm(),
in("a2") a2.to_asm(),
in("a3") a3.to_asm(),
in("a4") a4.to_asm(),
in("a5") a5.to_asm(),
options(nostack, preserves_flags, readonly)
);
FromAsm::from_asm(r0)
}