fallback:
	MOVD	$SYS_clock_gettime, R8
	SVC

finish:
	MOVD	0(RSP), R3	// sec
	MOVD	8(RSP), R5	// nsec

	MOVD	R20, RSP	// restore SP
	// Restore vdsoPC, vdsoSP
	// We don't worry about being signaled between the two stores.
	// If we are not in a signal handler, we'll restore vdsoSP to 0,
	// and no one will care about vdsoPC. If we are in a signal handler,
	// we cannot receive another signal.
	MOVD	16(RSP), R1

//                      TOC save slot is rewrittent to restore TOC.
// NOTOC -> TOC [P10]: A PIC call stub using P10 instructions to call the global entry
// NOTOC -> TOC [P8]:  A PIC call stub using P8 instructions to call the global entry
//
// TOC   -> dynamic:              A PLT call stub is generated which saves R2.
//                                 TOC save slot is rewritten to restore TOC.

	CMP	R1, $0
	BEQ	nocgo
	MOVD	$_rt0_s390x_lib_go(SB), R2
	MOVD	$0, R3
	BL	R1
	BR	restore

nocgo:
	MOVD	$0x800000, R1              // stacksize
	MOVD	R1, 0(R15)
	MOVD	$_rt0_s390x_lib_go(SB), R1
	MOVD	R1, 8(R15)                 // fn
	MOVD	$runtime·newosproc(SB), R1
	BL	R1

restore:
	// Restore F8-F15 from our stack frame.
	FMOVD	16(R15), F8
	FMOVD	24(R15), F9
	FMOVD	32(R15), F10

//
TEXT ·CallLeFuncWithErr(SB), NOSPLIT, $0
	MOVW PSALAA, R8
	MOVD LCA64(R8), R8
	MOVD CAA(R8), R9
	MOVD g, GOCB(R9)

	// Restore LE stack.
	MOVD SAVSTACK_ASYNC(R8), R9 // R9-> LE stack frame saving address
	MOVD 0(R9), R4              // R4-> restore previously saved stack frame pointer

	MOVD parms_base+8(FP), R7 // R7 -> argument array
	MOVD parms_len+16(FP), R8 // R8 number of arguments

	BEQZ	T0, nocgo
	MOV	$_rt0_riscv64_freebsd_lib_go(SB), A0
	MOV	$0, A1
	JALR	RA, T0
	JMP	restore

nocgo:
	MOV	$0x800000, A0                     // stacksize = 8192KB
	MOV	$_rt0_riscv64_freebsd_lib_go(SB), A1
	MOV	A0, 8(X2)
	MOV	A1, 16(X2)
	MOV	$runtime·newosproc0(SB), T0
	JALR	RA, T0

restore:
	// Restore callee-save registers, along with X1 (LR).
	MOV	(8*3)(X2), X1
	MOV	(8*4)(X2), X8
	MOV	(8*5)(X2), X9

			DetectedBinary:        "ip6tables",
			DetectedSaveBinary:    "ip6tables-save",
			DetectedRestoreBinary: "ip6tables-restore",
		}, nil
	}
	return IptablesVersion{
		DetectedBinary:        "iptables",
		DetectedSaveBinary:    "iptables-save",
		DetectedRestoreBinary: "iptables-restore",
	}, nil
}

	CMP	$0, R6
	BEQ	exit	// g.m == nil

	// restore libcall
	MOVD	96(R1), R7
	MOVD	R7, (m_libcall+libcall_fn)(R6)
	MOVD	104(R1), R7
	MOVD	R7, (m_libcall+libcall_args)(R6)
	MOVD	112(R1), R7
	MOVD	R7, (m_libcall+libcall_n)(R6)
	MOVD	120(R1), R7
	MOVD	R7, (m_libcall+libcall_r1)(R6)
	MOVD	128(R1), R7
	MOVD	R7, (m_libcall+libcall_r2)(R6)

	// restore errno
	MOVD	(m_mOS+mOS_perrno)(R6), R7
	MOVD	136(R1), R8

func sysWriteBits() fs.FileMode {
	// Read current umask. There's no way to read it without also setting it,
	// so set it conservatively and then restore the original one.
	m := syscall.Umask(0o777)
	syscall.Umask(m)    // restore bits
	if m&0o22 == 0o22 { // group and world are unwritable by default
		return 0o700
	}
	if m&0o2 == 0o2 { // group is writable by default, but not world
		return 0o770
	}

}

func getState(fd int) (*State, error) {
	return nil, fmt.Errorf("terminal: GetState not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

func restore(fd int, state *State) error {
	return fmt.Errorf("terminal: Restore not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

func getSize(fd int) (width, height int, err error) {

        when:
        succeeds "restore"

        then:
        executedAndNotSkipped(':restore')
        original.text == backup.text
        original.text == "Original"

        when:
        // The whole setup is as follows:
        // - Both the restore and the backup task have an entry in the task history
        // - The output of the restore path is the input of the backup task.