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

     1  // Copyright 2013 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 ARM, NetBSD
    10  //
    11  
    12  // func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
    13  // func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
    14  // func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32)
    15  
    16  TEXT	·Syscall(SB),NOSPLIT,$0-28
    17  	BL runtime·entersyscall(SB)
    18  	MOVW trap+0(FP), R0 // sigcall num
    19  	MOVW a1+4(FP), R1 // a1
    20  	MOVW a2+8(FP), R2 // a2
    21  	MOVW a3+12(FP), R3 // a3
    22  	SWI $0 // syscall
    23  	MOVW $0, R2
    24  	BCS error
    25  	MOVW R0, r1+16(FP) // r1
    26  	MOVW R1, r2+20(FP) // r2
    27  	MOVW R2, err+24(FP) // err
    28  	BL runtime·exitsyscall(SB)
    29  	RET
    30  error:
    31  	MOVW $-1, R3
    32  	MOVW R3, r1+16(FP) // r1
    33  	MOVW R2, r2+20(FP) // r2
    34  	MOVW R0, err+24(FP) // err
    35  	BL runtime·exitsyscall(SB)
    36  	RET
    37  
    38  TEXT	·Syscall6(SB),NOSPLIT,$0-40
    39  	BL runtime·entersyscall(SB)
    40  	MOVW trap+0(FP), R0 // sigcall num
    41  	MOVW a1+4(FP), R1 // a1
    42  	MOVW a2+8(FP), R2 // a2
    43  	MOVW a3+12(FP), R3 // a3
    44  	MOVW R13, R4
    45  	MOVW $a4+16(FP), R13 // a4 to a6 are passed on stack
    46  	SWI $0 // syscall
    47  	MOVW R4, R13
    48  	MOVW $0, R2
    49  	BCS error6
    50  	MOVW R0, r1+28(FP) // r1
    51  	MOVW R1, r2+32(FP) // r2
    52  	MOVW R2, err+36(FP) // err
    53  	BL runtime·exitsyscall(SB)
    54  	RET
    55  error6:
    56  	MOVW $-1, R3
    57  	MOVW R3, r1+28(FP) // r1
    58  	MOVW R2, r2+32(FP) // r2
    59  	MOVW R0, err+36(FP) // err
    60  	BL runtime·exitsyscall(SB)
    61  	RET
    62  
    63  TEXT	·Syscall9(SB),NOSPLIT,$0-52
    64  	BL runtime·entersyscall(SB)
    65  	MOVW trap+0(FP), R0 // sigcall num
    66  	MOVW a1+4(FP), R1 // a1
    67  	MOVW a2+8(FP), R2 // a2
    68  	MOVW a3+12(FP), R3 // a3
    69  	MOVW R13, R4
    70  	MOVW $a4+16(FP), R13 // a4 to a9 are passed on stack
    71  	SWI $0 // syscall
    72  	MOVW R4, R13
    73  	MOVW $0, R2
    74  	BCS error9
    75  	MOVW R0, r1+40(FP) // r1
    76  	MOVW R1, r2+44(FP) // r2
    77  	MOVW R2, err+48(FP) // err
    78  	BL runtime·exitsyscall(SB)
    79  	RET
    80  error9:
    81  	MOVW $-1, R3
    82  	MOVW R3, r1+40(FP) // r1
    83  	MOVW R2, r2+44(FP) // r2
    84  	MOVW R0, err+48(FP) // err
    85  	BL runtime·exitsyscall(SB)
    86  	RET
    87  
    88  TEXT	·RawSyscall(SB),NOSPLIT,$0-28
    89  	MOVW trap+0(FP), R0 // sigcall num
    90  	MOVW a1+4(FP), R1 // a1
    91  	MOVW a2+8(FP), R2 // a2
    92  	MOVW a3+12(FP), R3 // a3
    93  	SWI $0 // syscall
    94  	MOVW $0, R2
    95  	BCS errorr
    96  	MOVW R0, r1+16(FP) // r1
    97  	MOVW R1, r2+20(FP) // r2
    98  	MOVW R2, err+24(FP) // err
    99  	RET
   100  errorr:
   101  	MOVW $-1, R3
   102  	MOVW R3, r1+16(FP) // r1
   103  	MOVW R2, r2+20(FP) // r2
   104  	MOVW R0, err+24(FP) // err
   105  	RET
   106  
   107  TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
   108  	MOVW trap+0(FP), R0 // sigcall num
   109  	MOVW a1+4(FP), R1 // a1
   110  	MOVW a2+8(FP), R2 // a2
   111  	MOVW a3+12(FP), R3 // a3
   112  	MOVW R13, R4
   113  	MOVW $a4+16(FP), R13 // a4 to a9 are passed on stack
   114  	SWI $0 // syscall
   115  	MOVW R4, R13
   116  	MOVW $0, R2
   117  	BCS errorr6
   118  	MOVW R0, r1+28(FP) // r1
   119  	MOVW R1, r2+32(FP) // r2
   120  	MOVW R2, err+36(FP) // err
   121  	RET
   122  errorr6:
   123  	MOVW $-1, R3
   124  	MOVW R3, r1+28(FP) // r1
   125  	MOVW R2, r2+32(FP) // r2
   126  	MOVW R0, err+36(FP) // err
   127  	RET