asm_freebsd_arm64.s

     1  // Copyright 2019 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 ARM64, FreeBSD
     9  //
    10  
    11  #define SYS_syscall	0
    12  
    13  // func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
    14  TEXT ·Syscall(SB),NOSPLIT,$0-56
    15  	BL	runtime·entersyscall<ABIInternal>(SB)
    16  	MOVD	trap+0(FP), R8	// syscall entry
    17  	MOVD	a1+8(FP), R0
    18  	MOVD	a2+16(FP), R1
    19  	MOVD	a3+24(FP), R2
    20  	SVC	$SYS_syscall
    21  	BCC	ok
    22  	MOVD	$-1, R1
    23  	MOVD	R1, r1+32(FP)
    24  	MOVD	ZR, r2+40(FP)
    25  	MOVD	R0, err+48(FP)
    26  	BL	runtime·exitsyscall<ABIInternal>(SB)
    27  	RET
    28  ok:
    29  	MOVD	R0, r1+32(FP)
    30  	MOVD	R1, r2+40(FP)
    31  	MOVD	ZR, err+48(FP)
    32  	BL	runtime·exitsyscall<ABIInternal>(SB)
    33  	RET
    34  
    35  // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
    36  TEXT ·RawSyscall(SB),NOSPLIT,$0-56
    37  	MOVD	trap+0(FP), R8	// syscall entry
    38  	MOVD	a1+8(FP), R0
    39  	MOVD	a2+16(FP), R1
    40  	MOVD	a3+24(FP), R2
    41  	SVC	$SYS_syscall
    42  	BCC	ok
    43  	MOVD	$-1, R1
    44  	MOVD	R1, r1+32(FP)
    45  	MOVD	ZR, r2+40(FP)
    46  	MOVD	R0, err+48(FP)
    47  	RET
    48  ok:
    49  	MOVD	R0, r1+32(FP)
    50  	MOVD	R1, r2+40(FP)
    51  	MOVD	ZR, err+48(FP)
    52  	RET
    53  
    54  // func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
    55  TEXT ·Syscall6(SB),NOSPLIT,$0-80
    56  	BL	runtime·entersyscall<ABIInternal>(SB)
    57  	MOVD	trap+0(FP), R8	// syscall entry
    58  	MOVD	a1+8(FP), R0
    59  	MOVD	a2+16(FP), R1
    60  	MOVD	a3+24(FP), R2
    61  	MOVD	a4+32(FP), R3
    62  	MOVD	a5+40(FP), R4
    63  	MOVD	a6+48(FP), R5
    64  	SVC	$SYS_syscall
    65  	BCC	ok
    66  	MOVD	$-1, R1
    67  	MOVD	R1, r1+56(FP)
    68  	MOVD	ZR, r2+64(FP)
    69  	MOVD	R0, err+72(FP)
    70  	BL	runtime·exitsyscall<ABIInternal>(SB)
    71  	RET
    72  ok:
    73  	MOVD	R0, r1+56(FP)
    74  	MOVD	R1, r2+64(FP)
    75  	MOVD	ZR, err+72(FP)
    76  	BL	runtime·exitsyscall<ABIInternal>(SB)
    77  	RET
    78  
    79  // func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
    80  TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
    81  	MOVD	trap+0(FP), R8	// syscall entry
    82  	MOVD	a1+8(FP), R0
    83  	MOVD	a2+16(FP), R1
    84  	MOVD	a3+24(FP), R2
    85  	MOVD	a4+32(FP), R3
    86  	MOVD	a5+40(FP), R4
    87  	MOVD	a6+48(FP), R5
    88  	SVC	$SYS_syscall
    89  	BCC	ok
    90  	MOVD	$-1, R1
    91  	MOVD	R1, r1+56(FP)
    92  	MOVD	ZR, r2+64(FP)
    93  	MOVD	R0, err+72(FP)
    94  	RET
    95  ok:
    96  	MOVD	R0, r1+56(FP)
    97  	MOVD	R1, r2+64(FP)
    98  	MOVD	ZR, err+72(FP)
    99  	RET
   100  
   101  // Actually Syscall7
   102  // func Syscall9(num uintptr, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr)
   103  TEXT ·Syscall9(SB),NOSPLIT,$0-104
   104  	BL	runtime·entersyscall<ABIInternal>(SB)
   105  	MOVD	num+0(FP), R8	// syscall entry
   106  	MOVD	a1+8(FP), R0
   107  	MOVD	a2+16(FP), R1
   108  	MOVD	a3+24(FP), R2
   109  	MOVD	a4+32(FP), R3
   110  	MOVD	a5+40(FP), R4
   111  	MOVD	a6+48(FP), R5
   112  	MOVD	a7+56(FP), R6
   113  	// MOVD	a8+64(FP), R7
   114  	// MOVD	a9+72(FP), R8
   115  	SVC	$SYS_syscall
   116  	BCC	ok
   117  	MOVD	$-1, R1
   118  	MOVD	R1, r1+80(FP)
   119  	MOVD	ZR, r2+88(FP)
   120  	MOVD	R0, err+96(FP)
   121  	BL	runtime·exitsyscall<ABIInternal>(SB)
   122  	RET
   123  ok:
   124  	MOVD	R0, r1+80(FP)
   125  	MOVD	R1, r2+88(FP)
   126  	MOVD	ZR, err+96(FP)
   127  	BL	runtime·exitsyscall<ABIInternal>(SB)
   128  	RET
   129
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