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 (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
211	rsa.Service_name_len = uint64(length)
212}
213
214func InotifyInit() (fd int, err error) {
215	return InotifyInit1(0)
216}
217
218// dup2 exists because func Dup3 in syscall_linux.go references
219// it in an unreachable path. dup2 isn't available on arm64.
220func dup2(oldfd int, newfd int) error
221
222func Pause() error {
223	_, err := ppoll(nil, 0, nil, nil)
224	return err
225}
226
227func Poll(fds []PollFd, timeout int) (n int, err error) {
228	var ts *Timespec
229	if timeout >= 0 {
230		ts = new(Timespec)
231		*ts = NsecToTimespec(int64(timeout) * 1e6)
232	}
233	if len(fds) == 0 {
234		return ppoll(nil, 0, ts, nil)
235	}
236	return ppoll(&fds[0], len(fds), ts, nil)
237}
238
239//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
240
241func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
242	cmdlineLen := len(cmdline)
243	if cmdlineLen > 0 {
244		// Account for the additional NULL byte added by
245		// BytePtrFromString in kexecFileLoad. The kexec_file_load
246		// syscall expects a NULL-terminated string.
247		cmdlineLen++
248	}
249	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
250}
251