mirror of https://go.googlesource.com/go
42 lines
861 B
ArmAsm
42 lines
861 B
ArmAsm
// Copyright 2019 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 riscv64, 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|NOFRAME,$0-48
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MOV a1+8(FP), A0
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MOV a2+16(FP), A1
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MOV a3+24(FP), A2
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MOV ZERO, A3
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MOV ZERO, A4
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MOV ZERO, A5
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MOV trap+0(FP), A7 // syscall entry
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ECALL
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MOV $-4096, T0
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BLTU T0, A0, err
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MOV A0, r1+32(FP) // r1
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MOV ZERO, err+40(FP) // errno
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RET
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err:
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MOV $-1, T0
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MOV T0, r1+32(FP) // r1
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SUB A0, ZERO, A0
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MOV A0, err+40(FP) // errno
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RET
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TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
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MOV a1+8(FP), A0
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MOV a2+16(FP), A1
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MOV a3+24(FP), A2
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MOV trap+0(FP), A7 // syscall entry
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ECALL
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MOV A0, r1+32(FP)
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MOV A1, r2+40(FP)
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RET
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