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syscall: darwin/arm64 support
Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f04 Signed-off-by: Shenghou Ma <minux@golang.org> Reviewed-on: https://go-review.googlesource.com/8783 Reviewed-by: David Crawshaw <crawshaw@golang.org>
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‎src/syscall/asm_darwin_arm64.s‎

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

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mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
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mktypes="GOARCH=$GOARCH go tool cgo -godefs"
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;;
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darwin_arm64)
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mkerrors="$mkerrors -m64"
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mksysnum="./mksysnum_darwin.pl /usr/include/sys/syscall.h"
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mktypes="GOARCH=$GOARCH go tool cgo -godefs"
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;;
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dragonfly_386)
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mkerrors="$mkerrors -m32"
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mksyscall="./mksyscall.pl -l32 -dragonfly"

‎src/syscall/syscall_darwin_arm64.go‎

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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package syscall
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import "unsafe"
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func Getpagesize() int { return 16384 }
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func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
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func NsecToTimespec(nsec int64) (ts Timespec) {
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ts.Sec = nsec / 1e9
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ts.Nsec = nsec % 1e9
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return
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}
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func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
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func NsecToTimeval(nsec int64) (tv Timeval) {
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nsec += 999 // round up to microsecond
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tv.Usec = int32(nsec % 1e9 / 1e3)
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tv.Sec = int64(nsec / 1e9)
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return
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}
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//sysnb gettimeofday(tp *Timeval) (sec int64, usec int32, err error)
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func Gettimeofday(tv *Timeval) (err error) {
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// The tv passed to gettimeofday must be non-nil
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// but is otherwise unused. The answers come back
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// in the two registers.
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sec, usec, err := gettimeofday(tv)
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tv.Sec = sec
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tv.Usec = usec
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return err
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}
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func SetKevent(k *Kevent_t, fd, mode, flags int) {
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k.Ident = uint64(fd)
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k.Filter = int16(mode)
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k.Flags = uint16(flags)
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}
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func (iov *Iovec) SetLen(length int) {
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iov.Len = uint64(length)
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}
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func (msghdr *Msghdr) SetControllen(length int) {
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msghdr.Controllen = uint32(length)
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}
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func (cmsg *Cmsghdr) SetLen(length int) {
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cmsg.Len = uint32(length)
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}
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func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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var length = uint64(count)
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_, _, e1 := Syscall6(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(unsafe.Pointer(&length)), 0, 0)
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written = int(length)
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if e1 != 0 {
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err = e1
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}
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return
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}
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func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic

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