github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/internal/syscall/asm_linux_loong64.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  	MOVV	num+0(FP), R11  // syscall entry
    10  	MOVV	a1+8(FP), R4
    11  	MOVV	a2+16(FP), R5
    12  	MOVV	a3+24(FP), R6
    13  	MOVV	a4+32(FP), R7
    14  	MOVV	a5+40(FP), R8
    15  	MOVV	a6+48(FP), R9
    16  	SYSCALL
    17  	MOVW	$-4096, R12
    18  	BGEU	R12, R4, ok
    19  	MOVV	$-1, R12
    20  	MOVV	R12, r1+56(FP)
    21  	MOVV	R0, r2+64(FP)
    22  	SUBVU	R4, R0, R4
    23  	MOVV	R4, errno+72(FP)
    24  	RET
    25  ok:
    26  	MOVV	R4, r1+56(FP)
    27  	MOVV	R0, r2+64(FP)	// r2 is not used. Always set to 0.
    28  	MOVV	R0, errno+72(FP)
    29  	RET