mirror of https://go.googlesource.com/go
130 lines
2.8 KiB
ArmAsm
130 lines
2.8 KiB
ArmAsm
// Copyright 2020 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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// 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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JAL runtime·entersyscall(SB)
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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), R2 // syscall entry
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SYSCALL
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BEQ R7, ok
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MOVV $-1, R1
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MOVV R1, r1+32(FP) // r1
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MOVV R0, r2+40(FP) // r2
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MOVV R2, err+48(FP) // errno
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JAL runtime·exitsyscall(SB)
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RET
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ok:
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MOVV R2, r1+32(FP) // r1
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MOVV R3, r2+40(FP) // r2
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MOVV R0, err+48(FP) // errno
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JAL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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JAL runtime·entersyscall(SB)
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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 a4+32(FP), R7
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MOVV a5+40(FP), R8
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MOVV a6+48(FP), R9
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MOVV trap+0(FP), R2 // syscall entry
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SYSCALL
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BEQ R7, ok6
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MOVV $-1, R1
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MOVV R1, r1+56(FP) // r1
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MOVV R0, r2+64(FP) // r2
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MOVV R2, err+72(FP) // errno
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JAL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVV R2, r1+56(FP) // r1
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MOVV R3, r2+64(FP) // r2
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MOVV R0, err+72(FP) // errno
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JAL runtime·exitsyscall(SB)
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RET
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// func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
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// The openbsd/mips64 kernel only accepts eight syscall arguments, except
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// for SYS_syscall, where an additional argument can be passed on the stack.
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TEXT ·Syscall9(SB),NOSPLIT,$0-104
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JAL runtime·entersyscall(SB)
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MOVV num+0(FP), R2 // syscall entry
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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 a4+32(FP), R7
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MOVV a5+40(FP), R8
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MOVV a6+48(FP), R9
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MOVV a7+56(FP), R10
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MOVV a8+64(FP), R11
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MOVV a9+72(FP), R12
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SUBVU $16, R29
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MOVV R12, 0(R29) // arg 9 - only used for SYS_syscall.
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SYSCALL
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ADDV $16, R29
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BEQ R7, ok9
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MOVV $-1, R1
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MOVV R1, r1+80(FP) // r1
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MOVV R0, r2+88(FP) // r2
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MOVV R2, err+96(FP) // errno
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JAL runtime·exitsyscall(SB)
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RET
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ok9:
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MOVV R2, r1+80(FP) // r1
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MOVV R3, r2+88(FP) // r2
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MOVV R0, err+96(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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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), R2 // syscall entry
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SYSCALL
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BEQ R7, ok1
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MOVV $-1, R1
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MOVV R1, r1+32(FP) // r1
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MOVV R0, r2+40(FP) // r2
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MOVV R2, err+48(FP) // errno
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RET
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ok1:
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MOVV R2, r1+32(FP) // r1
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MOVV R3, r2+40(FP) // r2
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MOVV R0, err+48(FP) // errno
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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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 a4+32(FP), R7
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MOVV a5+40(FP), R8
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MOVV a6+48(FP), R9
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MOVV trap+0(FP), R2 // syscall entry
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SYSCALL
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BEQ R7, ok2
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MOVV $-1, R1
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MOVV R1, r1+56(FP) // r1
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MOVV R0, r2+64(FP) // r2
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MOVV R2, err+72(FP) // errno
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RET
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ok2:
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MOVV R2, r1+56(FP) // r1
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MOVV R3, r2+64(FP) // r2
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MOVV R0, err+72(FP) // errno
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RET
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