mirror of https://go.googlesource.com/go
69 lines
1.3 KiB
ArmAsm
69 lines
1.3 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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#define SYS_gettimeofday 96
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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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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 $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+32(FP)
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NEGQ AX
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MOVQ AX, err+40(FP)
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RET
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ok2:
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MOVQ AX, r1+32(FP)
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MOVQ $0, err+40(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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TESTQ AX, AX
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JZ fallback
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CALL AX
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ret:
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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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fallback:
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MOVL $SYS_gettimeofday, AX
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SYSCALL
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JMP ret
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ok7:
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MOVQ $0, err+8(FP)
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RET
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