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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,287 @@ | ||
| //! s390x 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| lateout("r2") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| in("r2") a0.to_asm(), | ||
| options(nostack, preserves_flags, noreturn) | ||
| ) | ||
| } | ||
|
|
||
| #[inline] | ||
| pub(in crate::backend) unsafe fn syscall2( | ||
| nr: SyscallNumber<'_>, | ||
| a0: ArgReg<'_, A0>, | ||
| a1: ArgReg<'_, A1>, | ||
| ) -> RetReg<R0> { | ||
| let r0; | ||
| asm!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") a3.to_asm(), | ||
| in("r6") 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!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") a3.to_asm(), | ||
| in("r6") 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> { | ||
| if nr.nr == linux_raw_sys::general::__NR_mmap as usize { | ||
| let mut a = [ | ||
| a0.to_asm(), | ||
| a1.to_asm(), | ||
| a2.to_asm(), | ||
| a3.to_asm(), | ||
| a4.to_asm(), | ||
| a5.to_asm(), | ||
| ]; | ||
| return syscall1(nr, a.as_mut_ptr().into()); | ||
| } | ||
| let r0; | ||
| asm!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") a3.to_asm(), | ||
| in("r6") a4.to_asm(), | ||
| in("r7") 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> { | ||
| if nr.nr == linux_raw_sys::general::__NR_mmap as usize { | ||
| let a = [ | ||
| a0.to_asm(), | ||
| a1.to_asm(), | ||
| a2.to_asm(), | ||
| a3.to_asm(), | ||
| a4.to_asm(), | ||
| a5.to_asm(), | ||
| ]; | ||
| return syscall1_readonly(nr, a.as_ptr().into()); | ||
| } | ||
| let r0; | ||
| asm!( | ||
| "svc 0", | ||
| in("r1") nr.to_asm(), | ||
| inlateout("r2") a0.to_asm() => r0, | ||
| in("r3") a1.to_asm(), | ||
| in("r4") a2.to_asm(), | ||
| in("r5") a3.to_asm(), | ||
| in("r6") a4.to_asm(), | ||
| in("r7") a5.to_asm(), | ||
| options(nostack, preserves_flags, readonly) | ||
| ); | ||
| FromAsm::from_asm(r0) | ||
| } |
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