github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/syscall/asm9_unix1_amd64.s (about)

     1  // Copyright 2016 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  //go:build netbsd
     6  // +build netbsd
     7  
     8  #include "textflag.h"
     9  #include "funcdata.h"
    10  
    11  //
    12  // Syscall9 support for AMD64, NetBSD
    13  //
    14  
    15  // func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
    16  TEXT	·Syscall9(SB),NOSPLIT,$0-104
    17  	CALL	runtime·entersyscall(SB)
    18  	MOVQ	num+0(FP), AX	// syscall entry
    19  	MOVQ	a1+8(FP), DI
    20  	MOVQ	a2+16(FP), SI
    21  	MOVQ	a3+24(FP), DX
    22  	MOVQ	a4+32(FP), R10
    23  	MOVQ	a5+40(FP), R8
    24  	MOVQ	a6+48(FP), R9
    25  	MOVQ	a7+56(FP), R11
    26  	MOVQ	a8+64(FP), R12
    27  	MOVQ	a9+72(FP), R13
    28  	SUBQ    $32, SP
    29  	MOVQ	R11, 8(SP)	// arg 7
    30  	MOVQ	R12, 16(SP)	// arg 8
    31  	MOVQ	R13, 24(SP)	// arg 9
    32  	SYSCALL
    33  	JCC	ok9
    34  	ADDQ    $32, SP
    35  	MOVQ	$-1, 88(SP)	// r1
    36  	MOVQ	$0, 96(SP)	// r2
    37  	MOVQ	AX, 104(SP)	// errno
    38  	CALL	runtime·exitsyscall(SB)
    39  	RET
    40  ok9:
    41  	ADDQ    $32, SP
    42  	MOVQ	AX, 88(SP)	// r1
    43  	MOVQ	DX, 96(SP)	// r2
    44  	MOVQ	$0, 104(SP)	// errno
    45  	CALL	runtime·exitsyscall(SB)
    46  	RET