| // 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. |
| |
| // TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP) |
| // so that go vet can check that they are correct. |
| |
| #include "textflag.h" |
| #include "funcdata.h" |
| |
| // |
| // System call support for 386, OpenBSD |
| // |
| |
| // func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32); |
| // func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32); |
| // Trap # in AX, args on stack above caller pc. |
| |
| TEXT ·Syscall(SB),NOSPLIT,$0-28 |
| CALL runtime·entersyscall(SB) |
| MOVL 4(SP), AX // syscall entry |
| // slide args down on top of system call number |
| LEAL 8(SP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL |
| MOVSL |
| MOVSL |
| INT $0x80 |
| JAE ok |
| MOVL $-1, 20(SP) // r1 |
| MOVL $-1, 24(SP) // r2 |
| MOVL AX, 28(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok: |
| MOVL AX, 20(SP) // r1 |
| MOVL DX, 24(SP) // r2 |
| MOVL $0, 28(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·Syscall6(SB),NOSPLIT,$0-40 |
| CALL runtime·entersyscall(SB) |
| MOVL 4(SP), AX // syscall entry |
| // slide args down on top of system call number |
| LEAL 8(SP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| INT $0x80 |
| JAE ok6 |
| MOVL $-1, 32(SP) // r1 |
| MOVL $-1, 36(SP) // r2 |
| MOVL AX, 40(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok6: |
| MOVL AX, 32(SP) // r1 |
| MOVL DX, 36(SP) // r2 |
| MOVL $0, 40(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·Syscall9(SB),NOSPLIT,$0-52 |
| CALL runtime·entersyscall(SB) |
| MOVL 4(SP), AX // syscall entry |
| // slide args down on top of system call number |
| LEAL 8(SP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| INT $0x80 |
| JAE ok9 |
| MOVL $-1, 44(SP) // r1 |
| MOVL $-1, 48(SP) // r2 |
| MOVL AX, 52(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok9: |
| MOVL AX, 44(SP) // r1 |
| MOVL DX, 48(SP) // r2 |
| MOVL $0, 52(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·RawSyscall(SB),NOSPLIT,$0-28 |
| MOVL 4(SP), AX // syscall entry |
| // slide args down on top of system call number |
| LEAL 8(SP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL |
| MOVSL |
| MOVSL |
| INT $0x80 |
| JAE ok1 |
| MOVL $-1, 20(SP) // r1 |
| MOVL $-1, 24(SP) // r2 |
| MOVL AX, 28(SP) // errno |
| RET |
| ok1: |
| MOVL AX, 20(SP) // r1 |
| MOVL DX, 24(SP) // r2 |
| MOVL $0, 28(SP) // errno |
| RET |
| |
| TEXT ·RawSyscall6(SB),NOSPLIT,$0-40 |
| MOVL 4(SP), AX // syscall entry |
| // slide args down on top of system call number |
| LEAL 8(SP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| MOVSL |
| INT $0x80 |
| JAE ok2 |
| MOVL $-1, 32(SP) // r1 |
| MOVL $-1, 36(SP) // r2 |
| MOVL AX, 40(SP) // errno |
| RET |
| ok2: |
| MOVL AX, 32(SP) // r1 |
| MOVL DX, 36(SP) // r2 |
| MOVL $0, 40(SP) // errno |
| RET |
