asm_unix_amd64.s raw

   1  // Copyright 2009 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  //go:build dragonfly || freebsd || netbsd
   6  
   7  #include "textflag.h"
   8  #include "funcdata.h"
   9  
  10  //
  11  // System call support for AMD64 unixes
  12  //
  13  
  14  // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
  15  // func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64)
  16  // Trap # in AX, args in DI SI DX, return in AX DX
  17  
  18  TEXT	·Syscall(SB),NOSPLIT,$0-56
  19  	CALL	runtime·entersyscall<ABIInternal>(SB)
  20  	MOVQ	trap+0(FP), AX	// syscall entry
  21  	MOVQ	a1+8(FP), DI
  22  	MOVQ	a2+16(FP), SI
  23  	MOVQ	a3+24(FP), DX
  24  	SYSCALL
  25  	JCC	ok
  26  	MOVQ	$-1, r1+32(FP)	// r1
  27  	MOVQ	$0, r2+40(FP)	// r2
  28  	MOVQ	AX, err+48(FP)	// errno
  29  	CALL	runtime·exitsyscall<ABIInternal>(SB)
  30  	RET
  31  ok:
  32  	MOVQ	AX, r1+32(FP)	// r1
  33  	MOVQ	DX, r2+40(FP)	// r2
  34  	MOVQ	$0, err+48(FP)	// errno
  35  	CALL	runtime·exitsyscall<ABIInternal>(SB)
  36  	RET
  37  
  38  TEXT	·Syscall6(SB),NOSPLIT,$0-80
  39  	CALL	runtime·entersyscall<ABIInternal>(SB)
  40  	MOVQ	trap+0(FP), AX	// syscall entry
  41  	MOVQ	a1+8(FP), DI
  42  	MOVQ	a2+16(FP), SI
  43  	MOVQ	a3+24(FP), DX
  44  	MOVQ	a4+32(FP), R10
  45  	MOVQ	a5+40(FP), R8
  46  	MOVQ	a6+48(FP), R9
  47  	SYSCALL
  48  	JCC	ok6
  49  	MOVQ	$-1, r1+56(FP)	// r1
  50  	MOVQ	$0, r2+64(FP)	// r2
  51  	MOVQ	AX, err+72(FP)  // errno
  52  	CALL	runtime·exitsyscall<ABIInternal>(SB)
  53  	RET
  54  ok6:
  55  	MOVQ	AX, r1+56(FP)	// r1
  56  	MOVQ	DX, r2+64(FP)	// r2
  57  	MOVQ	$0, err+72(FP)	// errno
  58  	CALL	runtime·exitsyscall<ABIInternal>(SB)
  59  	RET
  60  
  61  TEXT	·RawSyscall(SB),NOSPLIT,$0-56
  62  	MOVQ	a1+8(FP), DI
  63  	MOVQ	a2+16(FP), SI
  64  	MOVQ	a3+24(FP), DX
  65  	MOVQ	trap+0(FP), AX	// syscall entry
  66  	SYSCALL
  67  	JCC	ok1
  68  	MOVQ	$-1, r1+32(FP)	// r1
  69  	MOVQ	$0, r2+40(FP)	// r2
  70  	MOVQ	AX, err+48(FP)	// errno
  71  	RET
  72  ok1:
  73  	MOVQ	AX, r1+32(FP)	// r1
  74  	MOVQ	DX, r2+40(FP)	// r2
  75  	MOVQ	$0, err+48(FP)	// errno
  76  	RET
  77  
  78  TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
  79  	MOVQ	a1+8(FP), DI
  80  	MOVQ	a2+16(FP), SI
  81  	MOVQ	a3+24(FP), DX
  82  	MOVQ	a4+32(FP), R10
  83  	MOVQ	a5+40(FP), R8
  84  	MOVQ	a6+48(FP), R9
  85  	MOVQ	trap+0(FP), AX	// syscall entry
  86  	SYSCALL
  87  	JCC	ok2
  88  	MOVQ	$-1, r1+56(FP)	// r1
  89  	MOVQ	$0, r2+64(FP)	// r2
  90  	MOVQ	AX, err+72(FP)	// errno
  91  	RET
  92  ok2:
  93  	MOVQ	AX, r1+56(FP)	// r1
  94  	MOVQ	DX, r2+64(FP)	// r2
  95  	MOVQ	$0, err+72(FP)	// errno
  96  	RET
  97