| // Copyright 2013 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 amd64, Native Client |
| // |
| |
| #define NACL_SYSCALL(code) \ |
| MOVL $(0x10000 + ((code)<<5)), AX; CALL AX |
| |
| #define NACL_SYSJMP(code) \ |
| MOVL $(0x10000 + ((code)<<5)), AX; JMP AX |
| |
| TEXT ·Syscall(SB),NOSPLIT,$0-28 |
| CALL runtime·entersyscall(SB) |
| MOVL trap+0(FP), AX |
| MOVL a1+4(FP), DI |
| MOVL a2+8(FP), SI |
| MOVL a3+12(FP), DX |
| // more args would use CX, R8, R9 |
| SHLL $5, AX |
| ADDL $0x10000, AX |
| CALL AX |
| CMPL AX, $0 |
| JGE ok |
| MOVL $-1, r1+16(FP) |
| MOVL $-1, r2+20(FP) |
| NEGL AX |
| MOVL AX, err+24(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok: |
| MOVL AX, r1+16(FP) |
| MOVL DX, r2+20(FP) |
| MOVL $0, err+24(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
