-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathasm_unix_amd64.s
96 lines (88 loc) · 2.15 KB
/
asm_unix_amd64.s
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
// 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 dragonfly || freebsd || netbsd
#include "textflag.h"
#include "funcdata.h"
//
// System call support for AMD64 unixes
//
// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
// func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64)
// Trap # in AX, args in DI SI DX, return in AX DX
TEXT ·Syscall(SB),NOSPLIT,$0-56
CALL runtime·entersyscall<ABIInternal>(SB)
MOVQ trap+0(FP), AX // syscall entry
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
SYSCALL
JCC ok
MOVQ $-1, r1+32(FP) // r1
MOVQ $0, r2+40(FP) // r2
MOVQ AX, err+48(FP) // errno
CALL runtime·exitsyscall<ABIInternal>(SB)
RET
ok:
MOVQ AX, r1+32(FP) // r1
MOVQ DX, r2+40(FP) // r2
MOVQ $0, err+48(FP) // errno
CALL runtime·exitsyscall<ABIInternal>(SB)
RET
TEXT ·Syscall6(SB),NOSPLIT,$0-80
CALL runtime·entersyscall<ABIInternal>(SB)
MOVQ trap+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
SYSCALL
JCC ok6
MOVQ $-1, r1+56(FP) // r1
MOVQ $0, r2+64(FP) // r2
MOVQ AX, err+72(FP) // errno
CALL runtime·exitsyscall<ABIInternal>(SB)
RET
ok6:
MOVQ AX, r1+56(FP) // r1
MOVQ DX, r2+64(FP) // r2
MOVQ $0, err+72(FP) // errno
CALL runtime·exitsyscall<ABIInternal>(SB)
RET
TEXT ·RawSyscall(SB),NOSPLIT,$0-56
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
MOVQ trap+0(FP), AX // syscall entry
SYSCALL
JCC ok1
MOVQ $-1, r1+32(FP) // r1
MOVQ $0, r2+40(FP) // r2
MOVQ AX, err+48(FP) // errno
RET
ok1:
MOVQ AX, r1+32(FP) // r1
MOVQ DX, r2+40(FP) // r2
MOVQ $0, err+48(FP) // errno
RET
TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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
MOVQ trap+0(FP), AX // syscall entry
SYSCALL
JCC ok2
MOVQ $-1, r1+56(FP) // r1
MOVQ $0, r2+64(FP) // r2
MOVQ AX, err+72(FP) // errno
RET
ok2:
MOVQ AX, r1+56(FP) // r1
MOVQ DX, r2+64(FP) // r2
MOVQ $0, err+72(FP) // errno
RET