| // Copyright 2022 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" |
| |
| // func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr) |
| // |
| // Syscall # in AX, args in DI SI DX R10 R8 R9, return in AX DX. |
| // |
| // Note that this differs from "standard" ABI convention, which would pass 4th |
| // arg in CX, not R10. |
| TEXT ·Syscall6(SB),NOSPLIT,$0-80 |
| MOVQ num+0(FP), AX // syscall entry |
| MOVQ a1+8(FP), DI |
| MOVQ a2+16(FP), SI |
| MOVQ a3+24(FP), DX |
| MOVQ a4+32(FP), R10 |
| MOVQ a5+40(FP), R8 |
| MOVQ a6+48(FP), R9 |
| SYSCALL |
| CMPQ AX, $0xfffffffffffff001 |
| JLS ok |
| MOVQ $-1, r1+56(FP) |
| MOVQ $0, r2+64(FP) |
| NEGQ AX |
| MOVQ AX, errno+72(FP) |
| RET |
| ok: |
| MOVQ AX, r1+56(FP) |
| MOVQ DX, r2+64(FP) |
| MOVQ $0, errno+72(FP) |
| RET |
