1// Copyright 2015 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//go:build arm64 && linux
  6// +build arm64,linux
  7
  8package unix
  9
 10import "unsafe"
 11
 12func EpollCreate(size int) (fd int, err error) {
 13	if size <= 0 {
 14		return -1, EINVAL
 15	}
 16	return EpollCreate1(0)
 17}
 18
 19//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
 20//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
 21//sys	Fchown(fd int, uid int, gid int) (err error)
 22//sys	Fstat(fd int, stat *Stat_t) (err error)
 23//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
 24//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
 25//sys	Ftruncate(fd int, length int64) (err error)
 26//sysnb	Getegid() (egid int)
 27//sysnb	Geteuid() (euid int)
 28//sysnb	Getgid() (gid int)
 29//sysnb	getrlimit(resource int, rlim *Rlimit) (err error)
 30//sysnb	Getuid() (uid int)
 31//sys	Listen(s int, n int) (err error)
 32//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
 33//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
 34//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
 35//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
 36
 37func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
 38	var ts *Timespec
 39	if timeout != nil {
 40		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
 41	}
 42	return Pselect(nfd, r, w, e, ts, nil)
 43}
 44
 45//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
 46//sys	setfsgid(gid int) (prev int, err error)
 47//sys	setfsuid(uid int) (prev int, err error)
 48//sysnb	Setregid(rgid int, egid int) (err error)
 49//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
 50//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
 51//sysnb	setrlimit(resource int, rlim *Rlimit) (err error)
 52//sysnb	Setreuid(ruid int, euid int) (err error)
 53//sys	Shutdown(fd int, how int) (err error)
 54//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
 55
 56func Stat(path string, stat *Stat_t) (err error) {
 57	return Fstatat(AT_FDCWD, path, stat, 0)
 58}
 59
 60func Lchown(path string, uid int, gid int) (err error) {
 61	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
 62}
 63
 64func Lstat(path string, stat *Stat_t) (err error) {
 65	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
 66}
 67
 68//sys	Statfs(path string, buf *Statfs_t) (err error)
 69//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
 70//sys	Truncate(path string, length int64) (err error)
 71
 72func Ustat(dev int, ubuf *Ustat_t) (err error) {
 73	return ENOSYS
 74}
 75
 76//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
 77//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
 78//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 79//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 80//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
 81//sysnb	setgroups(n int, list *_Gid_t) (err error)
 82//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
 83//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
 84//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
 85//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
 86//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 87//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 88//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
 89//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
 90//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
 91//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
 92//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
 93
 94//sysnb	Gettimeofday(tv *Timeval) (err error)
 95
 96func setTimespec(sec, nsec int64) Timespec {
 97	return Timespec{Sec: sec, Nsec: nsec}
 98}
 99
100func setTimeval(sec, usec int64) Timeval {
101	return Timeval{Sec: sec, Usec: usec}
102}
103
104func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
105	if tv == nil {
106		return utimensat(dirfd, path, nil, 0)
107	}
108
109	ts := []Timespec{
110		NsecToTimespec(TimevalToNsec(tv[0])),
111		NsecToTimespec(TimevalToNsec(tv[1])),
112	}
113	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
114}
115
116func Time(t *Time_t) (Time_t, error) {
117	var tv Timeval
118	err := Gettimeofday(&tv)
119	if err != nil {
120		return 0, err
121	}
122	if t != nil {
123		*t = Time_t(tv.Sec)
124	}
125	return Time_t(tv.Sec), nil
126}
127
128func Utime(path string, buf *Utimbuf) error {
129	tv := []Timeval{
130		{Sec: buf.Actime},
131		{Sec: buf.Modtime},
132	}
133	return Utimes(path, tv)
134}
135
136func utimes(path string, tv *[2]Timeval) (err error) {
137	if tv == nil {
138		return utimensat(AT_FDCWD, path, nil, 0)
139	}
140
141	ts := []Timespec{
142		NsecToTimespec(TimevalToNsec(tv[0])),
143		NsecToTimespec(TimevalToNsec(tv[1])),
144	}
145	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
146}
147
148func Pipe(p []int) (err error) {
149	if len(p) != 2 {
150		return EINVAL
151	}
152	var pp [2]_C_int
153	err = pipe2(&pp, 0)
154	p[0] = int(pp[0])
155	p[1] = int(pp[1])
156	return
157}
158
159//sysnb	pipe2(p *[2]_C_int, flags int) (err error)
160
161func Pipe2(p []int, flags int) (err error) {
162	if len(p) != 2 {
163		return EINVAL
164	}
165	var pp [2]_C_int
166	err = pipe2(&pp, flags)
167	p[0] = int(pp[0])
168	p[1] = int(pp[1])
169	return
170}
171
172// Getrlimit prefers the prlimit64 system call. See issue 38604.
173func Getrlimit(resource int, rlim *Rlimit) error {
174	err := prlimit(0, resource, nil, rlim)
175	if err != ENOSYS {
176		return err
177	}
178	return getrlimit(resource, rlim)
179}
180
181// Setrlimit prefers the prlimit64 system call. See issue 38604.
182func Setrlimit(resource int, rlim *Rlimit) error {
183	err := prlimit(0, resource, rlim, nil)
184	if err != ENOSYS {
185		return err
186	}
187	return setrlimit(resource, rlim)
188}
189
190func (r *PtraceRegs) PC() uint64 { return r.Pc }
191
192func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
193
194func (iov *Iovec) SetLen(length int) {
195	iov.Len = uint64(length)
196}
197
198func (msghdr *Msghdr) SetControllen(length int) {
199	msghdr.Controllen = uint64(length)
200}
201
202func (msghdr *Msghdr) SetIovlen(length int) {
203	msghdr.Iovlen = uint64(length)
204}
205
206func (cmsg *Cmsghdr) SetLen(length int) {
207	cmsg.Len = uint64(length)
208}
209
210func InotifyInit() (fd int, err error) {
211	return InotifyInit1(0)
212}
213
214// dup2 exists because func Dup3 in syscall_linux.go references
215// it in an unreachable path. dup2 isn't available on arm64.
216func dup2(oldfd int, newfd int) error
217
218func Pause() error {
219	_, err := ppoll(nil, 0, nil, nil)
220	return err
221}
222
223func Poll(fds []PollFd, timeout int) (n int, err error) {
224	var ts *Timespec
225	if timeout >= 0 {
226		ts = new(Timespec)
227		*ts = NsecToTimespec(int64(timeout) * 1e6)
228	}
229	if len(fds) == 0 {
230		return ppoll(nil, 0, ts, nil)
231	}
232	return ppoll(&fds[0], len(fds), ts, nil)
233}
234
235//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
236
237func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
238	cmdlineLen := len(cmdline)
239	if cmdlineLen > 0 {
240		// Account for the additional NULL byte added by
241		// BytePtrFromString in kexecFileLoad. The kexec_file_load
242		// syscall expects a NULL-terminated string.
243		cmdlineLen++
244	}
245	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
246}