github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/internal/syscall/asm_linux_s390x.s (about)

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "textflag.h"
     6  
     7  // func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
     8  TEXT ·Syscall6(SB),NOSPLIT,$0-80
     9  	MOVD	num+0(FP), R1	// syscall entry
    10  	MOVD	a1+8(FP), R2
    11  	MOVD	a2+16(FP), R3
    12  	MOVD	a3+24(FP), R4
    13  	MOVD	a4+32(FP), R5
    14  	MOVD	a5+40(FP), R6
    15  	MOVD	a6+48(FP), R7
    16  	SYSCALL
    17  	MOVD	$0xfffffffffffff001, R8
    18  	CMPUBLT	R2, R8, ok
    19  	MOVD	$-1, r1+56(FP)
    20  	MOVD	$0, r2+64(FP)
    21  	NEG	R2, R2
    22  	MOVD	R2, errno+72(FP)
    23  	RET
    24  ok:
    25  	MOVD	R2, r1+56(FP)
    26  	MOVD	R3, r2+64(FP)
    27  	MOVD	$0, errno+72(FP)
    28  	RET