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Edit File: asm_darwin_amd64.s

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"
#include "funcdata.h"

//
// System call support for AMD64, Darwin
//

// Trap # in AX, args in DI SI DX, return in AX DX

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno);
TEXT	·Syscall(SB),NOSPLIT,$0-56
	CALL	runtime·entersyscall(SB)
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	trap+0(FP), AX	// syscall entry
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok
	MOVQ	$-1, r1+32(FP)
	MOVQ	$0, r2+40(FP)
	MOVQ	AX, err+48(FP)
	CALL	runtime·exitsyscall(SB)
	RET
ok:
	MOVQ	AX, r1+32(FP)
	MOVQ	DX, r2+40(FP)
	MOVQ	$0, err+48(FP)
	CALL	runtime·exitsyscall(SB)
	RET

// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno);
TEXT	·Syscall6(SB),NOSPLIT,$0-80
	CALL	runtime·entersyscall(SB)
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	a4+32(FP), R10
	MOVQ	a5+40(FP), R8
	MOVQ	a6+48(FP), R9
	MOVQ	trap+0(FP), AX	// syscall entry
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok6
	MOVQ	$-1, r1+56(FP)
	MOVQ	$0, r2+64(FP)
	MOVQ	AX, err+72(FP)
	CALL	runtime·exitsyscall(SB)
	RET
ok6:
	MOVQ	AX, r1+56(FP)
	MOVQ	DX, r2+64(FP)
	MOVQ	$0, err+72(FP)
	CALL	runtime·exitsyscall(SB)
	RET

// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall9(SB),NOSPLIT,$0-104
	CALL	runtime·entersyscall(SB)
	MOVQ	trap+0(FP), AX	// syscall entry
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	a4+32(FP), R10
	MOVQ	a5+40(FP), R8
	MOVQ	a6+48(FP), R9
	MOVQ	a7+56(FP), R11
	MOVQ	a8+64(FP), R12
	MOVQ	a9+72(FP), R13
	SUBQ	$32, SP
	MOVQ	R11, 8(SP)
	MOVQ	R12, 16(SP)
	MOVQ	R13, 24(SP)
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok9
	ADDQ	$32, SP
	MOVQ	$-1, r1+80(FP)
	MOVQ	$0, r2+88(FP)
	MOVQ	AX, err+96(FP)
	CALL	runtime·exitsyscall(SB)
	RET
ok9:
	ADDQ	$32, SP
	MOVQ	AX, r1+80(FP)
	MOVQ	DX, r2+88(FP)
	MOVQ	$0, err+96(FP)
	CALL	runtime·exitsyscall(SB)
	RET

// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT ·RawSyscall(SB),NOSPLIT,$0-56
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	trap+0(FP), AX	// syscall entry
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok1
	MOVQ	$-1, r1+32(FP)
	MOVQ	$0, r2+40(FP)
	MOVQ	AX, err+48(FP)
	RET
ok1:
	MOVQ	AX, r1+32(FP)
	MOVQ	DX, r2+40(FP)
	MOVQ	$0, err+48(FP)
	RET

// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	a4+32(FP), R10
	MOVQ	a5+40(FP), R8
	MOVQ	a6+48(FP), R9
	MOVQ	trap+0(FP), AX	// syscall entry
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok2
	MOVQ	$-1, r1+56(FP)
	MOVQ	$0, r2+64(FP)
	MOVQ	AX, err+72(FP)
	RET
ok2:
	MOVQ	AX, r1+56(FP)
	MOVQ	DX, r2+64(FP)
	MOVQ	$0, err+72(FP)
	RET