1// Copyright 2015 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
7//
8// System call support for ARM64, Darwin
9//
10
11// func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
12TEXT	·Syscall(SB),NOSPLIT,$0-56
13	BL	runtime·entersyscall(SB)
14	MOVD	trap+0(FP), R16
15	MOVD	a1+8(FP), R0
16	MOVD	a2+16(FP), R1
17	MOVD	a3+24(FP), R2
18	SVC	$0x80
19	BCC	ok
20	MOVD	$-1, R1
21	MOVD	R1, r1+32(FP)	// r1
22	MOVD	ZR, r2+40(FP)	// r2
23	MOVD	R0, err+48(FP)	// err
24	BL	runtime·exitsyscall(SB)
25	RET
26ok:
27	MOVD	R0, r1+32(FP) // r1
28	MOVD	R1, r2+40(FP)	// r2
29	MOVD	ZR, err+48(FP)	// err
30	BL	runtime·exitsyscall(SB)
31	RET
32
33// func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
34TEXT ·RawSyscall(SB),NOSPLIT,$0-56
35	MOVD	trap+0(FP), R16	// syscall entry
36	MOVD	a1+8(FP), R0
37	MOVD	a2+16(FP), R1
38	MOVD	a3+24(FP), R2
39	SVC	$0x80
40	BCC	ok
41	MOVD	$-1, R1
42	MOVD	R1, r1+32(FP)	// r1
43	MOVD	ZR, r2+40(FP)	// r2
44	MOVD	R0, err+48(FP)	// err
45	RET
46ok:
47	MOVD	R0, r1+32(FP) // r1
48	MOVD	R1, r2+40(FP)	// r2
49	MOVD	ZR, err+48(FP)	// err
50	RET
51
52// func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
53TEXT	·Syscall6(SB),NOSPLIT,$0-80
54	BL	runtime·entersyscall(SB)
55	MOVD	trap+0(FP), R16	// syscall entry
56	MOVD	a1+8(FP), R0
57	MOVD	a2+16(FP), R1
58	MOVD	a3+24(FP), R2
59	MOVD	a4+32(FP), R3
60	MOVD	a5+40(FP), R4
61	MOVD	a6+48(FP), R5
62	SVC	$0x80
63	BCC	ok
64	MOVD	$-1, R1
65	MOVD	R1, r1+56(FP)	// r1
66	MOVD	ZR, r2+64(FP)	// r2
67	MOVD	R0, err+72(FP)	// err
68	BL	runtime·exitsyscall(SB)
69	RET
70ok:
71	MOVD	R0, r1+56(FP) // r1
72	MOVD	R1, r2+64(FP)	// r2
73	MOVD	ZR, err+72(FP)	// err
74	BL	runtime·exitsyscall(SB)
75	RET
76
77// func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
78TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
79	MOVD	trap+0(FP), R16	// syscall entry
80	MOVD	a1+8(FP), R0
81	MOVD	a2+16(FP), R1
82	MOVD	a3+24(FP), R2
83	MOVD	a4+32(FP), R3
84	MOVD	a5+40(FP), R4
85	MOVD	a6+48(FP), R5
86	SVC	$0x80
87	BCC	ok
88	MOVD	$-1, R1
89	MOVD	R1, r1+56(FP)	// r1
90	MOVD	ZR, r2+64(FP)	// r2
91	MOVD	R0, err+72(FP)	// err
92	RET
93ok:
94	MOVD	R0, r1+56(FP) // r1
95	MOVD	R1, r2+64(FP)	// r2
96	MOVD	ZR, R0
97	MOVD	R0, err+72(FP)	// err
98	RET
99
100// Actually Syscall7
101TEXT	·Syscall9(SB),NOSPLIT,$0-104
102	BL	runtime·entersyscall(SB)
103	MOVD	num+0(FP), R16	// syscall entry
104	MOVD	a1+8(FP), R0
105	MOVD	a2+16(FP), R1
106	MOVD	a3+24(FP), R2
107	MOVD	a4+32(FP), R3
108	MOVD	a5+40(FP), R4
109	MOVD	a6+48(FP), R5
110	MOVD	a7+56(FP), R6
111	//MOVD	a8+64(FP), R7
112	//MOVD	a9+72(FP), R8
113	SVC	$0x80
114	BCC	ok
115	MOVD	$-1, R1
116	MOVD	R1, r1+80(FP)	// r1
117	MOVD	ZR, r2+88(FP)	// r2
118	MOVD	R0, err+96(FP)	// err
119	BL	runtime·exitsyscall(SB)
120	RET
121ok:
122	MOVD	R0, r1+80(FP) // r1
123	MOVD	R1, r2+88(FP)	// r2
124	MOVD	ZR, err+96(FP)	// err
125	BL	runtime·exitsyscall(SB)
126	RET
127
128