github.com/c9s/go@v0.0.0-20180120015821-984e81f64e0c/src/syscall/asm_darwin_arm.s (about)

     1  // Copyright 2014 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  //
     8  // System call support for ARM, Darwin
     9  //
    10  
    11  // func Syscall(syscall uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
    12  TEXT	·Syscall(SB),NOSPLIT,$0-28
    13  	BL		runtime·entersyscall(SB)
    14  	MOVW	trap+0(FP), R12
    15  	MOVW	a1+4(FP), R0
    16  	MOVW	a2+8(FP), R1
    17  	MOVW	a3+12(FP), R2
    18  	SWI		$0x80
    19  	BCC		ok
    20  	MOVW	$-1, R1
    21  	MOVW	R1, r1+16(FP)	// r1
    22  	MOVW	$0, R2
    23  	MOVW	R2, r2+20(FP)	// r2
    24  	MOVW	R0, err+24(FP)	// err
    25  	BL		runtime·exitsyscall(SB)
    26  	RET
    27  ok:
    28  	MOVW	R0, r1+16(FP) // r1
    29  	MOVW	R1, r2+20(FP)	// r2
    30  	MOVW	$0, R0
    31  	MOVW	R0, err+24(FP)	// err
    32  	BL		runtime·exitsyscall(SB)
    33  	RET
    34  
    35  // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
    36  TEXT ·RawSyscall(SB),NOSPLIT,$0-28
    37  	MOVW	trap+0(FP), R12	// syscall entry
    38  	MOVW	a1+4(FP), R0
    39  	MOVW	a2+8(FP), R1
    40  	MOVW	a3+12(FP), R2
    41  	SWI		$0x80
    42  	BCC		ok1
    43  	MOVW	$-1, R1
    44  	MOVW	R1, r1+16(FP)	// r1
    45  	MOVW	$0, R2
    46  	MOVW	R2, r2+20(FP)	// r2
    47  	MOVW	R0, err+24(FP)	// err
    48  	RET
    49  ok1:
    50  	MOVW	R0, r1+16(FP) // r1
    51  	MOVW	R1, r2+20(FP)	// r2
    52  	MOVW	$0, R0
    53  	MOVW	R0, err+24(FP)	// err
    54  	RET
    55  
    56  // func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
    57  TEXT	·Syscall6(SB),NOSPLIT,$0-40
    58  	BL		runtime·entersyscall(SB)
    59  	MOVW	trap+0(FP), R12	// syscall entry
    60  	MOVW	a1+4(FP), R0
    61  	MOVW	a2+8(FP), R1
    62  	MOVW	a3+12(FP), R2
    63  	MOVW	a4+16(FP), R3
    64  	MOVW	a5+20(FP), R4
    65  	MOVW	a6+24(FP), R5
    66  	SWI		$0x80
    67  	BCC		ok6
    68  	MOVW	$-1, R1
    69  	MOVW	R1, r1+28(FP)	// r1
    70  	MOVW	$0, R2
    71  	MOVW	R2, r2+32(FP)	// r2
    72  	MOVW	R0, err+36(FP)	// err
    73  	BL		runtime·exitsyscall(SB)
    74  	RET
    75  ok6:
    76  	MOVW	R0, r1+28(FP) // r1
    77  	MOVW	R1, r2+32(FP)	// r2
    78  	MOVW	$0, R0
    79  	MOVW	R0, err+36(FP)	// err
    80  	BL		runtime·exitsyscall(SB)
    81  	RET
    82  
    83  // func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
    84  TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
    85  	MOVW	trap+0(FP), R12	// syscall entry
    86  	MOVW	a1+4(FP), R0
    87  	MOVW	a2+8(FP), R1
    88  	MOVW	a3+12(FP), R2
    89  	MOVW	a4+16(FP), R3
    90  	MOVW	a5+20(FP), R4
    91  	MOVW	a6+24(FP), R5
    92  	SWI		$0x80
    93  	BCC		ok2
    94  	MOVW	$-1, R1
    95  	MOVW	R1, r1+28(FP)	// r1
    96  	MOVW	$0, R2
    97  	MOVW	R2, r2+32(FP)	// r2
    98  	MOVW	R0, err+36(FP)	// err
    99  	RET
   100  ok2:
   101  	MOVW	R0, r1+28(FP) // r1
   102  	MOVW	R1, r2+32(FP)	// r2
   103  	MOVW	$0, R0
   104  	MOVW	R0, err+36(FP)	// err
   105  	RET
   106  
   107  // Actually Syscall7.
   108  TEXT	·Syscall9(SB),NOSPLIT,$0-52
   109  	BL runtime·entersyscall(SB)
   110  	MOVW	num+0(FP), R12	// syscall entry
   111  	MOVW	a1+4(FP), R0
   112  	MOVW	a2+8(FP), R1
   113  	MOVW	a3+12(FP), R2
   114  	MOVW	a4+16(FP), R3
   115  	MOVW	a5+20(FP), R4
   116  	MOVW	a6+24(FP), R5
   117  	MOVW	a7+28(FP), R6
   118  	SWI		$0x80
   119  	BCC		ok9
   120  	MOVW	$-1, R1
   121  	MOVW	R1, r1+40(FP)	// r1
   122  	MOVW	$0, R2
   123  	MOVW	R2, r2+44(FP)	// r2
   124  	MOVW	R0, err+48(FP)	// err
   125  	BL		runtime·exitsyscall(SB)
   126  	RET
   127  ok9:
   128  	MOVW	R0, r1+40(FP) // r1
   129  	MOVW	R1, r2+44(FP)	// r2
   130  	MOVW	$0, R0
   131  	MOVW	R0, err+48(FP)	// err
   132  	BL	runtime·exitsyscall(SB)
   133  	RET