1// Copyright 2014 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#include "../runtime/syscall_nacl.h"
8
9//
10// System call support for ARM, Native Client
11//
12
13#define NACL_SYSCALL(code) \
14	MOVW $(0x10000 + ((code)<<5)), R8; BL (R8)
15
16#define NACL_SYSJMP(code) \
17	MOVW $(0x10000 + ((code)<<5)), R8; B (R8)
18
19TEXT ·Syscall(SB),NOSPLIT,$0-28
20	BL	runtime·entersyscall(SB)
21	MOVW	trap+0(FP), R8
22	MOVW	a1+4(FP), R0
23	MOVW	a2+8(FP), R1
24	MOVW	a3+12(FP), R2
25	// more args would use R3, and then stack.
26	MOVW	$0x10000, R7
27	ADD	R8<<5, R7
28	BL	(R7)
29	CMP	$0, R0
30	BGE	ok
31	MOVW	$-1, R1
32	MOVW	R1, r1+16(FP)
33	MOVW	R1, r2+20(FP)
34	RSB	$0, R0
35	MOVW	R0, err+24(FP)
36	BL	runtime·exitsyscall(SB)
37	RET
38ok:
39	MOVW	R0, r1+16(FP)
40	MOVW	R1, r2+20(FP)
41	MOVW	$0, R2
42	MOVW	R2, err+24(FP)
43	BL	runtime·exitsyscall(SB)
44	RET
45