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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// Copyright 2009 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 freebsd || netbsd
#include "textflag.h"
#include "funcdata.h"
//
// System call support for some 386 unixes
//
// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
// Trap # in AX, args on stack above caller pc.
TEXT ·Syscall(SB),NOSPLIT,$0-28
CALL runtime·entersyscall(SB)
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok
MOVL $-1, r1+16(FP) // r1
MOVL $-1, r2+20(FP) // r2
MOVL AX, err+24(FP) // errno
CALL runtime·exitsyscall(SB)
RET
ok:
MOVL AX, r1+16(FP) // r1
MOVL DX, r2+20(FP) // r2
MOVL $0, err+24(FP) // errno
CALL runtime·exitsyscall(SB)
RET
TEXT ·Syscall6(SB),NOSPLIT,$0-40
CALL runtime·entersyscall(SB)
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok6
MOVL $-1, r1+28(FP) // r1
MOVL $-1, r2+32(FP) // r2
MOVL AX, err+36(FP) // errno
CALL runtime·exitsyscall(SB)
RET
ok6:
MOVL AX, r1+28(FP) // r1
MOVL DX, r2+32(FP) // r2
MOVL $0, err+36(FP) // errno
CALL runtime·exitsyscall(SB)
RET
TEXT ·Syscall9(SB),NOSPLIT,$0-52
CALL runtime·entersyscall(SB)
MOVL num+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL num+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok9
MOVL $-1, r1+40(FP) // r1
MOVL $-1, r2+44(FP) // r2
MOVL AX, err+48(FP) // errno
CALL runtime·exitsyscall(SB)
RET
ok9:
MOVL AX, r1+40(FP) // r1
MOVL DX, r2+44(FP) // r2
MOVL $0, err+48(FP) // errno
CALL runtime·exitsyscall(SB)
RET
TEXT ·RawSyscall(SB),NOSPLIT,$0-28
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok1
MOVL $-1, r1+16(FP) // r1
MOVL $-1, r2+20(FP) // r2
MOVL AX, err+24(FP) // errno
RET
ok1:
MOVL AX, r1+16(FP) // r1
MOVL DX, r2+20(FP) // r2
MOVL $0, err+24(FP) // errno
RET
TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok2
MOVL $-1, r1+28(FP) // r1
MOVL $-1, r2+32(FP) // r2
MOVL AX, err+36(FP) // errno
RET
ok2:
MOVL AX, r1+28(FP) // r1
MOVL DX, r2+32(FP) // r2
MOVL $0, err+36(FP) // errno
RET
|
