| // 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" |
| |
| // |
| // System calls for loong64, Linux |
| // |
| |
| // func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr) |
| TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-48 |
| MOVV a1+8(FP), R4 |
| MOVV a2+16(FP), R5 |
| MOVV a3+24(FP), R6 |
| MOVV $0, R7 |
| MOVV $0, R8 |
| MOVV $0, R9 |
| MOVV trap+0(FP), R11 // syscall entry |
| SYSCALL |
| MOVW $-4096, R12 |
| BGEU R12, R4, ok |
| MOVV $-1, R12 |
| MOVV R12, r1+32(FP) // r1 |
| SUBVU R4, R0, R4 |
| MOVV R4, err+40(FP) // errno |
| RET |
| ok: |
| MOVV R4, r1+32(FP) // r1 |
| MOVV R0, err+40(FP) // errno |
| RET |
| |
| TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48 |
| MOVV a1+8(FP), R4 |
| MOVV a2+16(FP), R5 |
| MOVV a3+24(FP), R6 |
| MOVV R0, R7 |
| MOVV R0, R8 |
| MOVV R0, R9 |
| MOVV trap+0(FP), R11 // syscall entry |
| SYSCALL |
| MOVV R4, r1+32(FP) |
| MOVV R0, r2+40(FP) // r2 is not used. Always set to 0. |
| RET |
