github.com/s1s1ty/go@v0.0.0-20180207192209-104445e3140f/src/syscall/asm_linux_arm64.s (about)

     1  // Copyright 2015 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  
     7  // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
     8  
     9  TEXT	·Syscall(SB),NOSPLIT,$0-56
    10  	BL	runtime·entersyscall(SB)
    11  	MOVD	a1+8(FP), R0
    12  	MOVD	a2+16(FP), R1
    13  	MOVD	a3+24(FP), R2
    14  	MOVD	$0, R3
    15  	MOVD	$0, R4
    16  	MOVD	$0, R5
    17  	MOVD	trap+0(FP), R8	// syscall entry
    18  	SVC
    19  	CMN	$4095, R0
    20  	BCC	ok
    21  	MOVD	$-1, R4
    22  	MOVD	R4, r1+32(FP)	// r1
    23  	MOVD	ZR, r2+40(FP)	// r2
    24  	NEG	R0, R0
    25  	MOVD	R0, err+48(FP)	// errno
    26  	BL	runtime·exitsyscall(SB)
    27  	RET
    28  ok:
    29  	MOVD	R0, r1+32(FP)	// r1
    30  	MOVD	R1, r2+40(FP)	// r2
    31  	MOVD	ZR, err+48(FP)	// errno
    32  	BL	runtime·exitsyscall(SB)
    33  	RET
    34  
    35  TEXT ·Syscall6(SB),NOSPLIT,$0-80
    36  	BL	runtime·entersyscall(SB)
    37  	MOVD	a1+8(FP), R0
    38  	MOVD	a2+16(FP), R1
    39  	MOVD	a3+24(FP), R2
    40  	MOVD	a4+32(FP), R3
    41  	MOVD	a5+40(FP), R4
    42  	MOVD	a6+48(FP), R5
    43  	MOVD	trap+0(FP), R8	// syscall entry
    44  	SVC
    45  	CMN	$4095, R0
    46  	BCC	ok
    47  	MOVD	$-1, R4
    48  	MOVD	R4, r1+56(FP)	// r1
    49  	MOVD	ZR, r2+64(FP)	// r2
    50  	NEG	R0, R0
    51  	MOVD	R0, err+72(FP)	// errno
    52  	BL	runtime·exitsyscall(SB)
    53  	RET
    54  ok:
    55  	MOVD	R0, r1+56(FP)	// r1
    56  	MOVD	R1, r2+64(FP)	// r2
    57  	MOVD	ZR, err+72(FP)	// errno
    58  	BL	runtime·exitsyscall(SB)
    59  	RET
    60  
    61  TEXT ·RawSyscall(SB),NOSPLIT,$0-56
    62  	MOVD	a1+8(FP), R0
    63  	MOVD	a2+16(FP), R1
    64  	MOVD	a3+24(FP), R2
    65  	MOVD	$0, R3
    66  	MOVD	$0, R4
    67  	MOVD	$0, R5
    68  	MOVD	trap+0(FP), R8	// syscall entry
    69  	SVC
    70  	CMN	$4095, R0
    71  	BCC	ok
    72  	MOVD	$-1, R4
    73  	MOVD	R4, r1+32(FP)	// r1
    74  	MOVD	ZR, r2+40(FP)	// r2
    75  	NEG	R0, R0
    76  	MOVD	R0, err+48(FP)	// errno
    77  	RET
    78  ok:
    79  	MOVD	R0, r1+32(FP)	// r1
    80  	MOVD	R1, r2+40(FP)	// r2
    81  	MOVD	ZR, err+48(FP)	// errno
    82  	RET
    83  
    84  TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
    85  	MOVD	a1+8(FP), R0
    86  	MOVD	a2+16(FP), R1
    87  	MOVD	a3+24(FP), R2
    88  	MOVD	a4+32(FP), R3
    89  	MOVD	a5+40(FP), R4
    90  	MOVD	a6+48(FP), R5
    91  	MOVD	trap+0(FP), R8	// syscall entry
    92  	SVC
    93  	CMN	$4095, R0
    94  	BCC	ok
    95  	MOVD	$-1, R4
    96  	MOVD	R4, r1+56(FP)	// r1
    97  	MOVD	ZR, r2+64(FP)	// r2
    98  	NEG	R0, R0
    99  	MOVD	R0, err+72(FP)	// errno
   100  	RET
   101  ok:
   102  	MOVD	R0, r1+56(FP)	// r1
   103  	MOVD	R1, r2+64(FP)	// r2
   104  	MOVD	ZR, err+72(FP)	// errno
   105  	RET