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) 14TEXT ·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 28ok: 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) 36TEXT ·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 48ok: 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) 55TEXT ·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 72ok: 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) 80TEXT ·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 95ok: 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) 103TEXT ·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 123ok: 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