mirror of https://go.googlesource.com/go
126 lines
2.8 KiB
ArmAsm
126 lines
2.8 KiB
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 riscv64, FreeBSD
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//
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// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
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TEXT ·Syscall(SB),NOSPLIT,$0-56
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CALL runtime·entersyscall(SB)
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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), T0 // syscall entry
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ECALL
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BNE T0, ZERO, err
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MOV A0, r1+32(FP) // r1
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MOV A1, r2+40(FP) // r2
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MOV ZERO, err+48(FP) // errno
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CALL runtime·exitsyscall(SB)
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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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MOV ZERO, r2+40(FP) // r2
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MOV A0, err+48(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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CALL runtime·entersyscall(SB)
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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 a4+32(FP), A3
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MOV a5+40(FP), A4
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MOV a6+48(FP), A5
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MOV trap+0(FP), T0 // syscall entry
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ECALL
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BNE T0, ZERO, err
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MOV A0, r1+56(FP) // r1
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MOV A1, r2+64(FP) // r2
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MOV ZERO, err+72(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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err:
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MOV $-1, T0
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MOV T0, r1+56(FP) // r1
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MOV ZERO, r2+64(FP) // r2
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MOV A0, err+72(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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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), T0 // syscall entry
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ECALL
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BNE T0, ZERO, err
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MOV A0, r1+32(FP) // r1
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MOV A1, r2+40(FP) // r2
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MOV ZERO, err+48(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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MOV ZERO, r2+40(FP) // r2
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MOV A0, err+48(FP) // errno
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RET
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// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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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 a4+32(FP), A3
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MOV a5+40(FP), A4
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MOV a6+48(FP), A5
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MOV trap+0(FP), T0 // syscall entry
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ECALL
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BNE T0, ZERO, err
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MOV A0, r1+56(FP) // r1
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MOV A1, r2+64(FP) // r2
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MOV ZERO, err+72(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+56(FP) // r1
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MOV ZERO, r2+64(FP) // r2
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MOV A0, err+72(FP) // errno
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RET
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// Actually Syscall7
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// func Syscall9(num uintptr, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr)
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TEXT ·Syscall9(SB),NOSPLIT,$0-104
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CALL runtime·entersyscall(SB)
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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 a4+32(FP), A3
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MOV a5+40(FP), A4
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MOV a6+48(FP), A5
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MOV a7+56(FP), A6
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MOV num+0(FP), T0 // syscall entry
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ECALL
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BNE T0, ZERO, err
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MOV A0, r1+80(FP) // r1
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MOV A1, r2+88(FP) // r2
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MOV ZERO, err+96(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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err:
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MOV $-1, T0
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MOV T0, r1+80(FP) // r1
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MOV ZERO, r2+88(FP) // r2
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MOV A0, err+96(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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