Text file src/syscall/asm_freebsd_arm.s
1 // Copyright 2012 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 #include "textflag.h"
6 #include "funcdata.h"
7
8 //
9 // System call support for ARM, FreeBSD
10 //
11
12 // func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, errno uintptr);
13 // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr);
14 // func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, errno uintptr)
15
16 TEXT ·Syscall(SB),NOSPLIT,$0-28
17 BL runtime·entersyscall(SB)
18 MOVW trap+0(FP), R7 // syscall number
19 MOVW a1+4(FP), R0 // a1
20 MOVW a2+8(FP), R1 // a2
21 MOVW a3+12(FP), R2 // a3
22 SWI $0 // syscall
23 MOVW $0, R2
24 BCS error
25 MOVW R0, r1+16(FP) // r1
26 MOVW R1, r2+20(FP) // r2
27 MOVW R2, err+24(FP) // errno
28 BL runtime·exitsyscall(SB)
29 RET
30 error:
31 MOVW $-1, R3
32 MOVW R3, r1+16(FP) // r1
33 MOVW R2, r2+20(FP) // r2
34 MOVW R0, err+24(FP) // errno
35 BL runtime·exitsyscall(SB)
36 RET
37
38 TEXT ·Syscall6(SB),NOSPLIT,$0-40
39 BL runtime·entersyscall(SB)
40 MOVW trap+0(FP), R7 // syscall number
41 MOVW a1+4(FP), R0 // a1
42 MOVW a2+8(FP), R1 // a2
43 MOVW a3+12(FP), R2 // a3
44 MOVW a4+16(FP), R3 // a4
45 MOVW R13, R4
46 MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
47 SWI $0 // syscall
48 MOVW R4, R13
49 MOVW $0, R2
50 BCS error6
51 MOVW R0, r1+28(FP) // r1
52 MOVW R1, r2+32(FP) // r2
53 MOVW R2, err+36(FP) // errno
54 BL runtime·exitsyscall(SB)
55 RET
56 error6:
57 MOVW $-1, R3
58 MOVW R3, r1+28(FP) // r1
59 MOVW R2, r2+32(FP) // r2
60 MOVW R0, err+36(FP) // errno
61 BL runtime·exitsyscall(SB)
62 RET
63
64 TEXT ·Syscall9(SB),NOSPLIT,$0-52
65 BL runtime·entersyscall(SB)
66 MOVW num+0(FP), R7 // syscall number
67 MOVW a1+4(FP), R0 // a1
68 MOVW a2+8(FP), R1 // a2
69 MOVW a3+12(FP), R2 // a3
70 MOVW a4+16(FP), R3 // a4
71 MOVW R13, R4
72 MOVW $a5+20(FP), R13 // a5 to a9 are passed on stack
73 SWI $0 // syscall
74 MOVW R4, R13
75 MOVW $0, R2
76 BCS error9
77 MOVW R0, r1+40(FP) // r1
78 MOVW R1, r2+44(FP) // r2
79 MOVW R2, err+48(FP) // errno
80 BL runtime·exitsyscall(SB)
81 RET
82 error9:
83 MOVW $-1, R3
84 MOVW R3, r1+40(FP) // r1
85 MOVW R2, r2+44(FP) // r2
86 MOVW R0, err+48(FP) // errno
87 BL runtime·exitsyscall(SB)
88 RET
89
90 TEXT ·RawSyscall(SB),NOSPLIT,$0-28
91 MOVW trap+0(FP), R7 // syscall number
92 MOVW a1+4(FP), R0 // a1
93 MOVW a2+8(FP), R1 // a2
94 MOVW a3+12(FP), R2 // a3
95 SWI $0 // syscall
96 MOVW $0, R2
97 BCS errorr
98 MOVW R0, r1+16(FP) // r1
99 MOVW R1, r2+20(FP) // r2
100 MOVW R2, err+24(FP) // errno
101 RET
102 errorr:
103 MOVW $-1, R3
104 MOVW R3, r1+16(FP) // r1
105 MOVW R2, r2+20(FP) // r2
106 MOVW R0, err+24(FP) // errno
107 RET
108
109 TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
110 MOVW trap+0(FP), R7 // syscall number
111 MOVW a1+4(FP), R0 // a1
112 MOVW a2+8(FP), R1 // a2
113 MOVW a3+12(FP), R2 // a3
114 MOVW a4+16(FP), R3 // a4
115 MOVW R13, R4
116 MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
117 SWI $0 // syscall
118 MOVW R4, R13
119 MOVW $0, R2
120 BCS errorr6
121 MOVW R0, r1+28(FP) // r1
122 MOVW R1, r2+32(FP) // r2
123 MOVW R2, err+36(FP) // errno
124 RET
125 errorr6:
126 MOVW $-1, R3
127 MOVW R3, r1+28(FP) // r1
128 MOVW R2, r2+32(FP) // r2
129 MOVW R0, err+36(FP) // errno
130 RET
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