| // Copyright 2009 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. |
| |
| // |
| // System calls for 386, Native Client |
| // |
| |
| #define SYSCALL(x) $(0x10000+x * 32) |
| |
| // func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); |
| // Trap # in AX, args in BX CX DX SI DI, return in AX |
| |
| TEXT syscall·Syscall(SB),7,$20 |
| CALL runtime·entersyscall(SB) |
| MOVL trap+0(FP), AX // syscall entry |
| MOVL a1+4(FP), BX |
| MOVL a2+8(FP), CX |
| MOVL a3+12(FP), DX |
| MOVL $0, SI |
| MOVL $0, DI |
| |
| MOVL BX, 0(SP) |
| MOVL CX, 4(SP) |
| MOVL DX, 8(SP) |
| MOVL SI, 12(SP) |
| MOVL DI, 16(SP) |
| |
| // Call $(0x10000+32*AX) |
| SHLL $5, AX |
| ADDL $0x10000, AX |
| CALL AX |
| |
| CMPL AX, $0xfffff001 |
| JLS ok |
| MOVL $-1, r1+16(FP) |
| MOVL $0, r2+20(FP) |
| NEGL AX |
| MOVL AX, errno+24(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok: |
| MOVL AX, r1+16(FP) |
| MOVL DX, r2+20(FP) |
| MOVL $0, errno+24(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| // func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr); |
| TEXT syscall·Syscall6(SB),7,$24 |
| CALL runtime·entersyscall(SB) |
| MOVL a1+4(FP), BX |
| MOVL a2+8(FP), CX |
| MOVL a3+12(FP), DX |
| MOVL a4+16(FP), SI |
| MOVL a5+20(FP), DI |
| MOVL a6+24(FP), AX |
| |
| MOVL BX, 0(SP) |
| MOVL CX, 4(SP) |
| MOVL DX, 8(SP) |
| MOVL SI, 12(SP) |
| MOVL DI, 16(SP) |
| MOVL AX, 20(SP) |
| |
| // Call $(0x10000+32*trap) |
| MOVL trap+0(FP), AX // syscall entry |
| SHLL $5, AX |
| ADDL $0x10000, AX |
| CALL AX |
| |
| CMPL AX, $0xfffff001 |
| JLS ok6 |
| MOVL $-1, r1+28(FP) |
| MOVL $0, r2+32(FP) |
| NEGL AX |
| MOVL AX, errno+36(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok6: |
| MOVL AX, r1+28(FP) |
| MOVL DX, r2+32(FP) |
| MOVL $0, errno+36(FP) |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); |
| TEXT syscall·RawSyscall(SB),7,$20 |
| MOVL trap+0(FP), AX // syscall entry |
| MOVL a1+4(FP), BX |
| MOVL a2+8(FP), CX |
| MOVL a3+12(FP), DX |
| MOVL $0, SI |
| MOVL $0, DI |
| |
| MOVL BX, 0(SP) |
| MOVL CX, 4(SP) |
| MOVL DX, 8(SP) |
| MOVL SI, 12(SP) |
| MOVL DI, 16(SP) |
| |
| // Call $(0x10000+32*AX) |
| SHLL $5, AX |
| ADDL $0x10000, AX |
| CALL AX |
| |
| CMPL AX, $0xfffff001 |
| JLS ok1 |
| MOVL $-1, r1+16(FP) |
| MOVL $0, r2+20(FP) |
| NEGL AX |
| MOVL AX, errno+24(FP) |
| RET |
| ok1: |
| MOVL AX, r1+16(FP) |
| MOVL DX, r2+20(FP) |
| MOVL $0, errno+24(FP) |
| RET |
| |
