//! 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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 { 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) }