mirror of https://github.com/golang/go.git
131 lines
2.7 KiB
ArmAsm
131 lines
2.7 KiB
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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// See comment in runtime/sys_openbsd_arm64.s re this construction.
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#define INVOKE_SYSCALL \
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SVC; \
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NOOP; \
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NOOP
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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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BL runtime·entersyscall(SB)
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MOVD a1+8(FP), R0
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MOVD a2+16(FP), R1
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MOVD a3+24(FP), R2
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MOVD $0, R3
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MOVD $0, R4
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MOVD $0, R5
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MOVD trap+0(FP), R8 // syscall number
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INVOKE_SYSCALL
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BCC ok
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MOVD $-1, R4
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MOVD R4, r1+32(FP) // r1
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MOVD ZR, r2+40(FP) // r2
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MOVD R0, err+48(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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ok:
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MOVD R0, r1+32(FP) // r1
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MOVD R1, r2+40(FP) // r2
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MOVD ZR, err+48(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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BL runtime·entersyscall(SB)
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MOVD a1+8(FP), R0
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MOVD a2+16(FP), R1
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MOVD a3+24(FP), R2
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MOVD a4+32(FP), R3
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MOVD a5+40(FP), R4
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MOVD a6+48(FP), R5
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MOVD trap+0(FP), R8 // syscall number
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INVOKE_SYSCALL
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BCC ok
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MOVD $-1, R4
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MOVD R4, r1+56(FP) // r1
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MOVD ZR, r2+64(FP) // r2
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MOVD R0, err+72(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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ok:
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MOVD R0, r1+56(FP) // r1
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MOVD R1, r2+64(FP) // r2
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MOVD ZR, err+72(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall9(SB),NOSPLIT,$0-104
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BL runtime·entersyscall(SB)
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MOVD a1+8(FP), R0
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MOVD a2+16(FP), R1
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MOVD a3+24(FP), R2
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MOVD a4+32(FP), R3
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MOVD a5+40(FP), R4
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MOVD a6+48(FP), R5
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MOVD a7+56(FP), R6
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MOVD a8+64(FP), R7
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MOVD a9+72(FP), R8 // on stack
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MOVD R8, 8(RSP)
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MOVD num+0(FP), R8 // syscall number
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INVOKE_SYSCALL
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BCC ok
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MOVD $-1, R4
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MOVD R4, r1+80(FP) // r1
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MOVD ZR, r2+88(FP) // r2
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MOVD R0, err+96(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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ok:
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MOVD R0, r1+80(FP) // r1
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MOVD R1, r2+88(FP) // r2
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MOVD ZR, err+96(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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MOVD a1+8(FP), R0
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MOVD a2+16(FP), R1
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MOVD a3+24(FP), R2
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MOVD $0, R3
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MOVD $0, R4
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MOVD $0, R5
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MOVD trap+0(FP), R8 // syscall number
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INVOKE_SYSCALL
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BCC ok
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MOVD $-1, R4
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MOVD R4, r1+32(FP) // r1
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MOVD ZR, r2+40(FP) // r2
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MOVD R0, err+48(FP) // errno
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RET
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ok:
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MOVD R0, r1+32(FP) // r1
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MOVD R1, r2+40(FP) // r2
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MOVD ZR, err+48(FP) // errno
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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MOVD a1+8(FP), R0
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MOVD a2+16(FP), R1
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MOVD a3+24(FP), R2
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MOVD a4+32(FP), R3
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MOVD a5+40(FP), R4
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MOVD a6+48(FP), R5
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MOVD trap+0(FP), R8 // syscall number
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INVOKE_SYSCALL
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BCC ok
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MOVD $-1, R4
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MOVD R4, r1+56(FP) // r1
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MOVD ZR, r2+64(FP) // r2
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MOVD R0, err+72(FP) // errno
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RET
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ok:
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MOVD R0, r1+56(FP) // r1
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MOVD R1, r2+64(FP) // r2
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MOVD ZR, err+72(FP) // errno
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RET
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