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asm_darwin_arm64.s
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
//
// System call support for ARM64, Darwin
//
// func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
TEXT ·Syscall(SB),NOSPLIT,$0-56
BL runtime·entersyscall<ABIInternal>(SB)
MOVD trap+0(FP), R16
MOVD a1+8(FP), R0
MOVD a2+16(FP), R1
MOVD a3+24(FP), R2
SVC $0x80
BCC ok
MOVD $-1, R1
MOVD R1, r1+32(FP) // r1
MOVD ZR, r2+40(FP) // r2
MOVD R0, err+48(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET
ok:
MOVD R0, r1+32(FP) // r1
MOVD R1, r2+40(FP) // r2
MOVD ZR, err+48(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET
// func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr)
TEXT ·RawSyscall(SB),NOSPLIT,$0-56
MOVD trap+0(FP), R16 // syscall entry
MOVD a1+8(FP), R0
MOVD a2+16(FP), R1
MOVD a3+24(FP), R2
SVC $0x80
BCC ok
MOVD $-1, R1
MOVD R1, r1+32(FP) // r1
MOVD ZR, r2+40(FP) // r2
MOVD R0, err+48(FP) // err
RET
ok:
MOVD R0, r1+32(FP) // r1
MOVD R1, r2+40(FP) // r2
MOVD ZR, err+48(FP) // err
RET
// func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
BL runtime·entersyscall<ABIInternal>(SB)
MOVD trap+0(FP), R16 // syscall entry
MOVD a1+8(FP), R0
MOVD a2+16(FP), R1
MOVD a3+24(FP), R2
MOVD a4+32(FP), R3
MOVD a5+40(FP), R4
MOVD a6+48(FP), R5
SVC $0x80
BCC ok
MOVD $-1, R1
MOVD R1, r1+56(FP) // r1
MOVD ZR, r2+64(FP) // r2
MOVD R0, err+72(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET
ok:
MOVD R0, r1+56(FP) // r1
MOVD R1, r2+64(FP) // r2
MOVD ZR, err+72(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET
// func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
MOVD trap+0(FP), R16 // syscall entry
MOVD a1+8(FP), R0
MOVD a2+16(FP), R1
MOVD a3+24(FP), R2
MOVD a4+32(FP), R3
MOVD a5+40(FP), R4
MOVD a6+48(FP), R5
SVC $0x80
BCC ok
MOVD $-1, R1
MOVD R1, r1+56(FP) // r1
MOVD ZR, r2+64(FP) // r2
MOVD R0, err+72(FP) // err
RET
ok:
MOVD R0, r1+56(FP) // r1
MOVD R1, r2+64(FP) // r2
MOVD ZR, R0
MOVD R0, err+72(FP) // err
RET
// Actually Syscall7
TEXT ·Syscall9(SB),NOSPLIT,$0-104
BL runtime·entersyscall<ABIInternal>(SB)
MOVD num+0(FP), R16 // syscall entry
MOVD a1+8(FP), R0
MOVD a2+16(FP), R1
MOVD a3+24(FP), R2
MOVD a4+32(FP), R3
MOVD a5+40(FP), R4
MOVD a6+48(FP), R5
MOVD a7+56(FP), R6
//MOVD a8+64(FP), R7
//MOVD a9+72(FP), R8
SVC $0x80
BCC ok
MOVD $-1, R1
MOVD R1, r1+80(FP) // r1
MOVD ZR, r2+88(FP) // r2
MOVD R0, err+96(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET
ok:
MOVD R0, r1+80(FP) // r1
MOVD R1, r2+88(FP) // r2
MOVD ZR, err+96(FP) // err
BL runtime·exitsyscall<ABIInternal>(SB)
RET