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
16TEXT	·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
30error:
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
38TEXT	·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
56error6:
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
64TEXT	·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
82error9:
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
90TEXT	·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
102errorr:
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
109TEXT	·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
125errorr6:
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
131