github.com/tidwall/go@v0.0.0-20170415222209-6694a6888b7d/src/syscall/asm9_unix1_amd64.s (about)

     1  // +build netbsd openbsd
     2  
     3  // Copyright 2016 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  #include "textflag.h"
     8  #include "funcdata.h"
     9  
    10  //
    11  // Syscall9 support for AMD64, NetBSD and OpenBSD
    12  //
    13  
    14  // func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
    15  TEXT	·Syscall9(SB),NOSPLIT,$0-104
    16  	CALL	runtime·entersyscall(SB)
    17  	MOVQ	num+0(FP), AX	// syscall entry
    18  	MOVQ	a1+8(FP), DI
    19  	MOVQ	a2+16(FP), SI
    20  	MOVQ	a3+24(FP), DX
    21  	MOVQ	a4+32(FP), R10
    22  	MOVQ	a5+40(FP), R8
    23  	MOVQ	a6+48(FP), R9
    24  	MOVQ	a7+56(FP), R11
    25  	MOVQ	a8+64(FP), R12
    26  	MOVQ	a9+72(FP), R13
    27  	SUBQ    $32, SP
    28  	MOVQ	R11, 8(SP)	// arg 7
    29  	MOVQ	R12, 16(SP)	// arg 8
    30  	MOVQ	R13, 24(SP)	// arg 9
    31  	SYSCALL
    32  	JCC	ok9
    33  	ADDQ    $32, SP
    34  	MOVQ	$-1, 88(SP)	// r1
    35  	MOVQ	$0, 96(SP)	// r2
    36  	MOVQ	AX, 104(SP)	// errno
    37  	CALL	runtime·exitsyscall(SB)
    38  	RET
    39  ok9:
    40  	ADDQ    $32, SP
    41  	MOVQ	AX, 88(SP)	// r1
    42  	MOVQ	DX, 96(SP)	// r2
    43  	MOVQ	$0, 104(SP)	// errno
    44  	CALL	runtime·exitsyscall(SB)
    45  	RET