// 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