-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathasm_freebsd_riscv64.s
125 lines (117 loc) · 2.76 KB
/
asm_freebsd_riscv64.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
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
// Copyright 2022 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.
#include "textflag.h"
//
// System calls for riscv64, FreeBSD
//
// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
TEXT ·Syscall(SB),NOSPLIT,$0-56
CALL runtime·entersyscall(SB)
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV trap+0(FP), T0 // syscall entry
ECALL
BNE T0, ZERO, err
MOV A0, r1+32(FP) // r1
MOV A1, r2+40(FP) // r2
MOV ZERO, err+48(FP) // errno
CALL runtime·exitsyscall(SB)
RET
err:
MOV $-1, T0
MOV T0, r1+32(FP) // r1
MOV ZERO, r2+40(FP) // r2
MOV A0, err+48(FP) // errno
CALL runtime·exitsyscall(SB)
RET
// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
CALL runtime·entersyscall(SB)
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV a4+32(FP), A3
MOV a5+40(FP), A4
MOV a6+48(FP), A5
MOV trap+0(FP), T0 // syscall entry
ECALL
BNE T0, ZERO, err
MOV A0, r1+56(FP) // r1
MOV A1, r2+64(FP) // r2
MOV ZERO, err+72(FP) // errno
CALL runtime·exitsyscall(SB)
RET
err:
MOV $-1, T0
MOV T0, r1+56(FP) // r1
MOV ZERO, r2+64(FP) // r2
MOV A0, err+72(FP) // errno
CALL runtime·exitsyscall(SB)
RET
// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
TEXT ·RawSyscall(SB),NOSPLIT,$0-56
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV trap+0(FP), T0 // syscall entry
ECALL
BNE T0, ZERO, err
MOV A0, r1+32(FP) // r1
MOV A1, r2+40(FP) // r2
MOV ZERO, err+48(FP) // errno
RET
err:
MOV $-1, T0
MOV T0, r1+32(FP) // r1
MOV ZERO, r2+40(FP) // r2
MOV A0, err+48(FP) // errno
RET
// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV a4+32(FP), A3
MOV a5+40(FP), A4
MOV a6+48(FP), A5
MOV trap+0(FP), T0 // syscall entry
ECALL
BNE T0, ZERO, err
MOV A0, r1+56(FP) // r1
MOV A1, r2+64(FP) // r2
MOV ZERO, err+72(FP) // errno
RET
err:
MOV $-1, T0
MOV T0, r1+56(FP) // r1
MOV ZERO, r2+64(FP) // r2
MOV A0, err+72(FP) // errno
RET
// Actually Syscall7
// func Syscall9(num uintptr, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr)
TEXT ·Syscall9(SB),NOSPLIT,$0-104
CALL runtime·entersyscall(SB)
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV a4+32(FP), A3
MOV a5+40(FP), A4
MOV a6+48(FP), A5
MOV a7+56(FP), A6
MOV num+0(FP), T0 // syscall entry
ECALL
BNE T0, ZERO, err
MOV A0, r1+80(FP) // r1
MOV A1, r2+88(FP) // r2
MOV ZERO, err+96(FP) // errno
CALL runtime·exitsyscall(SB)
RET
err:
MOV $-1, T0
MOV T0, r1+80(FP) // r1
MOV ZERO, r2+88(FP) // r2
MOV A0, err+96(FP) // errno
CALL runtime·exitsyscall(SB)
RET