1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build dragonfly || freebsd
// +build dragonfly freebsd
#include "textflag.h"
#include "funcdata.h"
//
// Syscall9 support for AMD64, DragonFly and FreeBSD
//
// func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
TEXT ·Syscall9(SB),NOSPLIT,$0-104
CALL runtime·entersyscall(SB)
MOVQ num+0(FP), AX // syscall entry
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
MOVQ a4+32(FP), R10
MOVQ a5+40(FP), R8
MOVQ a6+48(FP), R9
// shift around the last three arguments so they're at the
// top of the stack when the syscall is called.
// note that we are scribbling over the Go arguments now.
MOVQ SP, CX // hide (SP) writes from vet
MOVQ a7+56(FP), R11 // arg 7
MOVQ R11, 8(CX)
MOVQ a8+64(FP), R11 // arg 8
MOVQ R11, 16(CX)
MOVQ a9+72(FP), R11 // arg 9
MOVQ R11, 24(CX)
SYSCALL
JCC ok9
MOVQ $-1, r1+80(FP) // r1
MOVQ $0, r2+88(FP) // r2
MOVQ AX, err+96(FP) // errno
CALL runtime·exitsyscall(SB)
RET
ok9:
MOVQ AX, r1+80(FP) // r1
MOVQ DX, r2+88(FP) // r2
MOVQ $0, err+96(FP) // errno
CALL runtime·exitsyscall(SB)
RET
|
