asm_freebsd_arm.s raw

   1  // Copyright 2012 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, FreeBSD
  10  //
  11  
  12  // func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, errno uintptr);
  13  // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr);
  14  // func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, errno uintptr)
  15  
  16  TEXT	·Syscall(SB),NOSPLIT,$0-28
  17  	BL runtime·entersyscall(SB)
  18  	MOVW trap+0(FP), R7 // syscall number
  19  	MOVW a1+4(FP), R0 // a1
  20  	MOVW a2+8(FP), R1 // a2
  21  	MOVW a3+12(FP), R2 // 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) // errno
  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) // errno
  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), R7 // syscall number
  41  	MOVW a1+4(FP), R0 // a1
  42  	MOVW a2+8(FP), R1 // a2
  43  	MOVW a3+12(FP), R2 // a3
  44  	MOVW a4+16(FP), R3 // a4
  45  	MOVW R13, R4
  46  	MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
  47  	SWI $0 // syscall
  48  	MOVW R4, R13
  49  	MOVW $0, R2
  50  	BCS error6
  51  	MOVW R0, r1+28(FP) // r1
  52  	MOVW R1, r2+32(FP) // r2
  53  	MOVW R2, err+36(FP) // errno
  54  	BL runtime·exitsyscall(SB)
  55  	RET
  56  error6:
  57  	MOVW $-1, R3
  58  	MOVW R3, r1+28(FP) // r1
  59  	MOVW R2, r2+32(FP) // r2
  60  	MOVW R0, err+36(FP) // errno
  61  	BL runtime·exitsyscall(SB)
  62  	RET
  63  
  64  TEXT	·Syscall9(SB),NOSPLIT,$0-52
  65  	BL runtime·entersyscall(SB)
  66  	MOVW num+0(FP), R7 // syscall number
  67  	MOVW a1+4(FP), R0 // a1
  68  	MOVW a2+8(FP), R1 // a2
  69  	MOVW a3+12(FP), R2 // a3
  70  	MOVW a4+16(FP), R3 // a4
  71  	MOVW R13, R4
  72  	MOVW $a5+20(FP), R13 // a5 to a9 are passed on stack
  73  	SWI $0 // syscall
  74  	MOVW R4, R13
  75  	MOVW $0, R2
  76  	BCS error9
  77  	MOVW R0, r1+40(FP) // r1
  78  	MOVW R1, r2+44(FP) // r2
  79  	MOVW R2, err+48(FP) // errno
  80  	BL runtime·exitsyscall(SB)
  81  	RET
  82  error9:
  83  	MOVW $-1, R3
  84  	MOVW R3, r1+40(FP) // r1
  85  	MOVW R2, r2+44(FP) // r2
  86  	MOVW R0, err+48(FP) // errno
  87  	BL runtime·exitsyscall(SB)
  88  	RET
  89  
  90  TEXT	·RawSyscall(SB),NOSPLIT,$0-28
  91  	MOVW trap+0(FP), R7 // syscall number
  92  	MOVW a1+4(FP), R0 // a1
  93  	MOVW a2+8(FP), R1 // a2
  94  	MOVW a3+12(FP), R2 // a3
  95  	SWI $0 // syscall
  96  	MOVW $0, R2
  97  	BCS errorr
  98  	MOVW R0, r1+16(FP) // r1
  99  	MOVW R1, r2+20(FP) // r2
 100  	MOVW R2, err+24(FP) // errno
 101  	RET
 102  errorr:
 103  	MOVW $-1, R3
 104  	MOVW R3, r1+16(FP) // r1
 105  	MOVW R2, r2+20(FP) // r2
 106  	MOVW R0, err+24(FP) // errno
 107  	RET
 108  
 109  TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
 110  	MOVW trap+0(FP), R7 // syscall number
 111  	MOVW a1+4(FP), R0 // a1
 112  	MOVW a2+8(FP), R1 // a2
 113  	MOVW a3+12(FP), R2 // a3
 114  	MOVW a4+16(FP), R3 // a4
 115  	MOVW R13, R4
 116  	MOVW $a5+20(FP), R13 // a5 to a6 are passed on stack
 117  	SWI $0 // syscall
 118  	MOVW R4, R13
 119  	MOVW $0, R2
 120  	BCS errorr6
 121  	MOVW R0, r1+28(FP) // r1
 122  	MOVW R1, r2+32(FP) // r2
 123  	MOVW R2, err+36(FP) // errno
 124  	RET
 125  errorr6:
 126  	MOVW $-1, R3
 127  	MOVW R3, r1+28(FP) // r1
 128  	MOVW R2, r2+32(FP) // r2
 129  	MOVW R0, err+36(FP) // errno
 130  	RET
 131