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
12//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
13//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
14//sys	Fchown(fd int, uid int, gid int) (err error)
15//sys	Fstat(fd int, stat *Stat_t) (err error)
16//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
17//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
18//sys	Ftruncate(fd int, length int64) (err error)
19//sysnb	Getegid() (egid int)
20//sysnb	Geteuid() (euid int)
21//sysnb	Getgid() (gid int)
22//sysnb	getrlimit(resource int, rlim *Rlimit) (err error)
23//sysnb	Getuid() (uid int)
24//sys	Listen(s int, n int) (err error)
25//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
26//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
27//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
28//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
29
30func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
31	var ts *Timespec
32	if timeout != nil {
33		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
34	}
35	return Pselect(nfd, r, w, e, ts, nil)
36}
37
38//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
39//sys	setfsgid(gid int) (prev int, err error)
40//sys	setfsuid(uid int) (prev int, err error)
41//sysnb	Setregid(rgid int, egid int) (err error)
42//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
43//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
44//sysnb	setrlimit(resource int, rlim *Rlimit) (err error)
45//sysnb	Setreuid(ruid int, euid int) (err error)
46//sys	Shutdown(fd int, how int) (err error)
47//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
48
49func Stat(path string, stat *Stat_t) (err error) {
50	return Fstatat(AT_FDCWD, path, stat, 0)
51}
52
53func Lchown(path string, uid int, gid int) (err error) {
54	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
55}
56
57func Lstat(path string, stat *Stat_t) (err error) {
58	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
59}
60
61//sys	Statfs(path string, buf *Statfs_t) (err error)
62//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
63//sys	Truncate(path string, length int64) (err error)
64
65func Ustat(dev int, ubuf *Ustat_t) (err error) {
66	return ENOSYS
67}
68
69//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
70//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
71//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
72//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
73//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
74//sysnb	setgroups(n int, list *_Gid_t) (err error)
75//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
76//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
77//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
78//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
79//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
80//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
81//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
82//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
83//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
84//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
85//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
86
87//sysnb	Gettimeofday(tv *Timeval) (err error)
88
89func setTimespec(sec, nsec int64) Timespec {
90	return Timespec{Sec: sec, Nsec: nsec}
91}
92
93func setTimeval(sec, usec int64) Timeval {
94	return Timeval{Sec: sec, Usec: usec}
95}
96
97func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
98	if tv == nil {
99		return utimensat(dirfd, path, nil, 0)
100	}
101
102	ts := []Timespec{
103		NsecToTimespec(TimevalToNsec(tv[0])),
104		NsecToTimespec(TimevalToNsec(tv[1])),
105	}
106	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
107}
108
109func Time(t *Time_t) (Time_t, error) {
110	var tv Timeval
111	err := Gettimeofday(&tv)
112	if err != nil {
113		return 0, err
114	}
115	if t != nil {
116		*t = Time_t(tv.Sec)
117	}
118	return Time_t(tv.Sec), nil
119}
120
121func Utime(path string, buf *Utimbuf) error {
122	tv := []Timeval{
123		{Sec: buf.Actime},
124		{Sec: buf.Modtime},
125	}
126	return Utimes(path, tv)
127}
128
129func utimes(path string, tv *[2]Timeval) (err error) {
130	if tv == nil {
131		return utimensat(AT_FDCWD, path, nil, 0)
132	}
133
134	ts := []Timespec{
135		NsecToTimespec(TimevalToNsec(tv[0])),
136		NsecToTimespec(TimevalToNsec(tv[1])),
137	}
138	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
139}
140
141// Getrlimit prefers the prlimit64 system call. See issue 38604.
142func Getrlimit(resource int, rlim *Rlimit) error {
143	err := Prlimit(0, resource, nil, rlim)
144	if err != ENOSYS {
145		return err
146	}
147	return getrlimit(resource, rlim)
148}
149
150// Setrlimit prefers the prlimit64 system call. See issue 38604.
151func Setrlimit(resource int, rlim *Rlimit) error {
152	err := Prlimit(0, resource, rlim, nil)
153	if err != ENOSYS {
154		return err
155	}
156	return setrlimit(resource, rlim)
157}
158
159func (r *PtraceRegs) PC() uint64 { return r.Pc }
160
161func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
162
163func (iov *Iovec) SetLen(length int) {
164	iov.Len = uint64(length)
165}
166
167func (msghdr *Msghdr) SetControllen(length int) {
168	msghdr.Controllen = uint64(length)
169}
170
171func (msghdr *Msghdr) SetIovlen(length int) {
172	msghdr.Iovlen = uint64(length)
173}
174
175func (cmsg *Cmsghdr) SetLen(length int) {
176	cmsg.Len = uint64(length)
177}
178
179func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
180	rsa.Service_name_len = uint64(length)
181}
182
183func Pause() error {
184	_, err := ppoll(nil, 0, nil, nil)
185	return err
186}
187
188//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
189
190func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
191	cmdlineLen := len(cmdline)
192	if cmdlineLen > 0 {
193		// Account for the additional NULL byte added by
194		// BytePtrFromString in kexecFileLoad. The kexec_file_load
195		// syscall expects a NULL-terminated string.
196		cmdlineLen++
197	}
198	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
199}
200