github.com/hlts2/go@v0.0.0-20170904000733-812b34efaed8/src/syscall/asm_darwin_amd64.s (about)

     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  #include "textflag.h"
     6  #include "funcdata.h"
     7  
     8  //
     9  // System call support for AMD64, Darwin
    10  //
    11  
    12  // Trap # in AX, args in DI SI DX, return in AX DX
    13  
    14  // func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno);
    15  TEXT	·Syscall(SB),NOSPLIT,$0-56
    16  	CALL	runtime·entersyscall(SB)
    17  	MOVQ	a1+8(FP), DI
    18  	MOVQ	a2+16(FP), SI
    19  	MOVQ	a3+24(FP), DX
    20  	MOVQ	$0, R10
    21  	MOVQ	$0, R8
    22  	MOVQ	$0, R9
    23  	MOVQ	trap+0(FP), AX	// syscall entry
    24  	ADDQ	$0x2000000, AX
    25  	SYSCALL
    26  	JCC	ok
    27  	MOVQ	$-1, r1+32(FP)
    28  	MOVQ	$0, r2+40(FP)
    29  	MOVQ	AX, err+48(FP)
    30  	CALL	runtime·exitsyscall(SB)
    31  	RET
    32  ok:
    33  	MOVQ	AX, r1+32(FP)
    34  	MOVQ	DX, r2+40(FP)
    35  	MOVQ	$0, err+48(FP)
    36  	CALL	runtime·exitsyscall(SB)
    37  	RET
    38  
    39  // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno);
    40  TEXT	·Syscall6(SB),NOSPLIT,$0-80
    41  	CALL	runtime·entersyscall(SB)
    42  	MOVQ	a1+8(FP), DI
    43  	MOVQ	a2+16(FP), SI
    44  	MOVQ	a3+24(FP), DX
    45  	MOVQ	a4+32(FP), R10
    46  	MOVQ	a5+40(FP), R8
    47  	MOVQ	a6+48(FP), R9
    48  	MOVQ	trap+0(FP), AX	// syscall entry
    49  	ADDQ	$0x2000000, AX
    50  	SYSCALL
    51  	JCC	ok6
    52  	MOVQ	$-1, r1+56(FP)
    53  	MOVQ	$0, r2+64(FP)
    54  	MOVQ	AX, err+72(FP)
    55  	CALL	runtime·exitsyscall(SB)
    56  	RET
    57  ok6:
    58  	MOVQ	AX, r1+56(FP)
    59  	MOVQ	DX, r2+64(FP)
    60  	MOVQ	$0, err+72(FP)
    61  	CALL	runtime·exitsyscall(SB)
    62  	RET
    63  
    64  // func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
    65  TEXT	·Syscall9(SB),NOSPLIT,$0-104
    66  	CALL	runtime·entersyscall(SB)
    67  	MOVQ	trap+0(FP), AX	// syscall entry
    68  	MOVQ	a1+8(FP), DI
    69  	MOVQ	a2+16(FP), SI
    70  	MOVQ	a3+24(FP), DX
    71  	MOVQ	a4+32(FP), R10
    72  	MOVQ	a5+40(FP), R8
    73  	MOVQ	a6+48(FP), R9
    74  	MOVQ	a7+56(FP), R11
    75  	MOVQ	a8+64(FP), R12
    76  	MOVQ	a9+72(FP), R13
    77  	SUBQ	$32, SP
    78  	MOVQ	R11, 8(SP)
    79  	MOVQ	R12, 16(SP)
    80  	MOVQ	R13, 24(SP)
    81  	ADDQ	$0x2000000, AX
    82  	SYSCALL
    83  	JCC	ok9
    84  	ADDQ	$32, SP
    85  	MOVQ	$-1, r1+80(FP)
    86  	MOVQ	$0, r2+88(FP)
    87  	MOVQ	AX, err+96(FP)
    88  	CALL	runtime·exitsyscall(SB)
    89  	RET
    90  ok9:
    91  	ADDQ	$32, SP
    92  	MOVQ	AX, r1+80(FP)
    93  	MOVQ	DX, r2+88(FP)
    94  	MOVQ	$0, err+96(FP)
    95  	CALL	runtime·exitsyscall(SB)
    96  	RET
    97  
    98  // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
    99  TEXT ·RawSyscall(SB),NOSPLIT,$0-56
   100  	MOVQ	a1+8(FP), DI
   101  	MOVQ	a2+16(FP), SI
   102  	MOVQ	a3+24(FP), DX
   103  	MOVQ	$0, R10
   104  	MOVQ	$0, R8
   105  	MOVQ	$0, R9
   106  	MOVQ	trap+0(FP), AX	// syscall entry
   107  	ADDQ	$0x2000000, AX
   108  	SYSCALL
   109  	JCC	ok1
   110  	MOVQ	$-1, r1+32(FP)
   111  	MOVQ	$0, r2+40(FP)
   112  	MOVQ	AX, err+48(FP)
   113  	RET
   114  ok1:
   115  	MOVQ	AX, r1+32(FP)
   116  	MOVQ	DX, r2+40(FP)
   117  	MOVQ	$0, err+48(FP)
   118  	RET
   119  
   120  // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
   121  TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
   122  	MOVQ	a1+8(FP), DI
   123  	MOVQ	a2+16(FP), SI
   124  	MOVQ	a3+24(FP), DX
   125  	MOVQ	a4+32(FP), R10
   126  	MOVQ	a5+40(FP), R8
   127  	MOVQ	a6+48(FP), R9
   128  	MOVQ	trap+0(FP), AX	// syscall entry
   129  	ADDQ	$0x2000000, AX
   130  	SYSCALL
   131  	JCC	ok2
   132  	MOVQ	$-1, r1+56(FP)
   133  	MOVQ	$0, r2+64(FP)
   134  	MOVQ	AX, err+72(FP)
   135  	RET
   136  ok2:
   137  	MOVQ	AX, r1+56(FP)
   138  	MOVQ	DX, r2+64(FP)
   139  	MOVQ	$0, err+72(FP)
   140  	RET