| // Copyright 2014 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" |
| #include "funcdata.h" |
| #include "../runtime/syscall_nacl.h" |
| |
| // |
| // System call support for ARM, Native Client |
| // |
| |
| #define NACL_SYSCALL(code) \ |
| MOVW $(0x10000 + ((code)<<5)), R8; BL (R8) |
| |
| #define NACL_SYSJMP(code) \ |
| MOVW $(0x10000 + ((code)<<5)), R8; B (R8) |
| |
| TEXT ·Syscall(SB),NOSPLIT,$0-28 |
| BL runtime·entersyscall(SB) |
| MOVW trap+0(FP), R8 |
| MOVW a1+4(FP), R0 |
| MOVW a2+8(FP), R1 |
| MOVW a3+12(FP), R2 |
| // more args would use R3, and then stack. |
| MOVW $0x10000, R7 |
| ADD R8<<5, R7 |
| BL (R7) |
| CMP $0, R0 |
| BGE ok |
| MOVW $-1, R1 |
| MOVW R1, r1+16(FP) |
| MOVW R1, r2+20(FP) |
| RSB $0, R0 |
| MOVW R0, err+24(FP) |
| BL runtime·exitsyscall(SB) |
| RET |
| ok: |
| MOVW R0, r1+16(FP) |
| MOVW R1, r2+20(FP) |
| MOVW $0, R2 |
| MOVW R2, err+24(FP) |
| BL runtime·exitsyscall(SB) |
| RET |
