mirror of https://github.com/golang/go.git
157 lines
3.2 KiB
ArmAsm
157 lines
3.2 KiB
ArmAsm
// Copyright 2009 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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#include "funcdata.h"
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//
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// System calls for AMD64, Linux
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//
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// func Syscall(trap int64, a1, a2, a3 uintptr) (r1, r2, err uintptr);
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// Trap # in AX, args in DI SI DX R10 R8 R9, return in AX DX
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// Note that this differs from "standard" ABI convention, which
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// would pass 4th arg in CX, not R10.
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TEXT ·Syscall(SB),NOSPLIT,$0-56
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CALL runtime·entersyscall(SB)
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MOVQ a1+8(FP), DI
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MOVQ a2+16(FP), SI
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MOVQ a3+24(FP), DX
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MOVQ trap+0(FP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok
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MOVQ $-1, r1+32(FP)
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MOVQ $0, r2+40(FP)
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NEGQ AX
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MOVQ AX, err+48(FP)
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CALL runtime·exitsyscall(SB)
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RET
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ok:
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MOVQ AX, r1+32(FP)
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MOVQ DX, r2+40(FP)
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MOVQ $0, err+48(FP)
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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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MOVQ a1+8(FP), DI
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MOVQ a2+16(FP), SI
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MOVQ a3+24(FP), DX
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MOVQ a4+32(FP), R10
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MOVQ a5+40(FP), R8
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MOVQ a6+48(FP), R9
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MOVQ trap+0(FP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok6
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MOVQ $-1, r1+56(FP)
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MOVQ $0, r2+64(FP)
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NEGQ AX
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MOVQ AX, err+72(FP)
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CALL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVQ AX, r1+56(FP)
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MOVQ DX, r2+64(FP)
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MOVQ $0, err+72(FP)
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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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MOVQ a1+8(FP), DI
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MOVQ a2+16(FP), SI
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MOVQ a3+24(FP), DX
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MOVQ trap+0(FP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok1
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MOVQ $-1, r1+32(FP)
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MOVQ $0, r2+40(FP)
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NEGQ AX
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MOVQ AX, err+48(FP)
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RET
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ok1:
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MOVQ AX, r1+32(FP)
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MOVQ DX, r2+40(FP)
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MOVQ $0, err+48(FP)
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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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MOVQ a1+8(FP), DI
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MOVQ a2+16(FP), SI
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MOVQ a3+24(FP), DX
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MOVQ a4+32(FP), R10
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MOVQ a5+40(FP), R8
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MOVQ a6+48(FP), R9
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MOVQ trap+0(FP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok2
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MOVQ $-1, r1+56(FP)
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MOVQ $0, r2+64(FP)
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NEGQ AX
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MOVQ AX, err+72(FP)
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RET
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ok2:
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MOVQ AX, r1+56(FP)
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MOVQ DX, r2+64(FP)
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MOVQ $0, err+72(FP)
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RET
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// func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr)
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TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-32
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MOVQ a1+8(FP), DI
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MOVQ $0, SI
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MOVQ $0, DX
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MOVQ $0, R10
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MOVQ $0, R8
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MOVQ $0, R9
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MOVQ trap+0(FP), AX // syscall entry
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POPQ R12 // preserve return address
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SYSCALL
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PUSHQ R12
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CMPQ AX, $0xfffffffffffff001
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JLS ok2
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MOVQ $-1, r1+16(FP)
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NEGQ AX
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MOVQ AX, err+24(FP)
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RET
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ok2:
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MOVQ AX, r1+16(FP)
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MOVQ $0, err+24(FP)
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RET
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// func rawSyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr)
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TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
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MOVQ a1+8(FP), DI
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MOVQ a2+16(FP), SI
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MOVQ a3+24(FP), DX
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MOVQ trap+0(FP), AX // syscall entry
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SYSCALL
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MOVQ AX, r1+32(FP)
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MOVQ DX, r2+40(FP)
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RET
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// func gettimeofday(tv *Timeval) (err uintptr)
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TEXT ·gettimeofday(SB),NOSPLIT,$0-16
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MOVQ tv+0(FP), DI
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MOVQ $0, SI
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MOVQ runtime·vdsoGettimeofdaySym(SB), AX
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CALL AX
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CMPQ AX, $0xfffffffffffff001
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JLS ok7
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NEGQ AX
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MOVQ AX, err+8(FP)
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RET
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ok7:
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MOVQ $0, err+8(FP)
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RET
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