mirror of https://go.googlesource.com/go
45 lines
947 B
ArmAsm
45 lines
947 B
ArmAsm
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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//
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// System calls for loong64, Linux
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//
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// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
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TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-48
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MOVV a1+8(FP), R4
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MOVV a2+16(FP), R5
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MOVV a3+24(FP), R6
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MOVV $0, R7
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MOVV $0, R8
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MOVV $0, R9
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MOVV trap+0(FP), R11 // syscall entry
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SYSCALL
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MOVW $-4096, R12
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BGEU R12, R4, ok
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MOVV $-1, R12
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MOVV R12, r1+32(FP) // r1
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SUBVU R4, R0, R4
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MOVV R4, err+40(FP) // errno
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RET
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ok:
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MOVV R4, r1+32(FP) // r1
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MOVV R0, err+40(FP) // errno
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RET
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TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
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MOVV a1+8(FP), R4
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MOVV a2+16(FP), R5
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MOVV a3+24(FP), R6
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MOVV R0, R7
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MOVV R0, R8
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MOVV R0, R9
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MOVV trap+0(FP), R11 // syscall entry
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SYSCALL
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MOVV R4, r1+32(FP)
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MOVV R0, r2+40(FP) // r2 is not used. Always set to 0.
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RET
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