1// Copyright 2009 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 amd64 && linux
  6// +build amd64,linux
  7
  8package unix
  9
 10//sys	dup2(oldfd int, newfd int) (err error)
 11//sysnb	EpollCreate(size int) (fd int, err error)
 12//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
 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(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
 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//sysnb	inotifyInit() (fd int, err error)
 25
 26func InotifyInit() (fd int, err error) {
 27	// First try inotify_init1, because Android's seccomp policy blocks the latter.
 28	fd, err = InotifyInit1(0)
 29	if err == ENOSYS {
 30		fd, err = inotifyInit()
 31	}
 32	return
 33}
 34
 35//sys	Ioperm(from int, num int, on int) (err error)
 36//sys	Iopl(level int) (err error)
 37//sys	Lchown(path string, uid int, gid int) (err error)
 38//sys	Listen(s int, n int) (err error)
 39
 40func Lstat(path string, stat *Stat_t) (err error) {
 41	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
 42}
 43
 44//sys	Pause() (err error)
 45//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
 46//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
 47//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
 48//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
 49
 50func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
 51	var ts *Timespec
 52	if timeout != nil {
 53		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
 54	}
 55	return Pselect(nfd, r, w, e, ts, nil)
 56}
 57
 58//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
 59//sys	setfsgid(gid int) (prev int, err error)
 60//sys	setfsuid(uid int) (prev int, err error)
 61//sysnb	Setregid(rgid int, egid int) (err error)
 62//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
 63//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
 64//sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
 65//sysnb	Setreuid(ruid int, euid int) (err error)
 66//sys	Shutdown(fd int, how int) (err error)
 67//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
 68
 69func Stat(path string, stat *Stat_t) (err error) {
 70	// Use fstatat, because Android's seccomp policy blocks stat.
 71	return Fstatat(AT_FDCWD, path, stat, 0)
 72}
 73
 74//sys	Statfs(path string, buf *Statfs_t) (err error)
 75//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
 76//sys	Truncate(path string, length int64) (err error)
 77//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
 78//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
 79//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
 80//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 81//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 82//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
 83//sysnb	setgroups(n int, list *_Gid_t) (err error)
 84//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
 85//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
 86//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
 87//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
 88//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 89//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 90//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
 91//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
 92//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
 93//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
 94//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
 95
 96//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
 97
 98func Gettimeofday(tv *Timeval) (err error) {
 99	errno := gettimeofday(tv)
100	if errno != 0 {
101		return errno
102	}
103	return nil
104}
105
106func Time(t *Time_t) (tt Time_t, err error) {
107	var tv Timeval
108	errno := gettimeofday(&tv)
109	if errno != 0 {
110		return 0, errno
111	}
112	if t != nil {
113		*t = Time_t(tv.Sec)
114	}
115	return Time_t(tv.Sec), nil
116}
117
118//sys	Utime(path string, buf *Utimbuf) (err error)
119//sys	utimes(path string, times *[2]Timeval) (err error)
120
121func setTimespec(sec, nsec int64) Timespec {
122	return Timespec{Sec: sec, Nsec: nsec}
123}
124
125func setTimeval(sec, usec int64) Timeval {
126	return Timeval{Sec: sec, Usec: usec}
127}
128
129//sysnb	pipe(p *[2]_C_int) (err error)
130
131func Pipe(p []int) (err error) {
132	if len(p) != 2 {
133		return EINVAL
134	}
135	var pp [2]_C_int
136	err = pipe(&pp)
137	p[0] = int(pp[0])
138	p[1] = int(pp[1])
139	return
140}
141
142//sysnb	pipe2(p *[2]_C_int, flags int) (err error)
143
144func Pipe2(p []int, flags int) (err error) {
145	if len(p) != 2 {
146		return EINVAL
147	}
148	var pp [2]_C_int
149	err = pipe2(&pp, flags)
150	p[0] = int(pp[0])
151	p[1] = int(pp[1])
152	return
153}
154
155func (r *PtraceRegs) PC() uint64 { return r.Rip }
156
157func (r *PtraceRegs) SetPC(pc uint64) { r.Rip = pc }
158
159func (iov *Iovec) SetLen(length int) {
160	iov.Len = uint64(length)
161}
162
163func (msghdr *Msghdr) SetControllen(length int) {
164	msghdr.Controllen = uint64(length)
165}
166
167func (msghdr *Msghdr) SetIovlen(length int) {
168	msghdr.Iovlen = uint64(length)
169}
170
171func (cmsg *Cmsghdr) SetLen(length int) {
172	cmsg.Len = uint64(length)
173}
174
175//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
176
177func Poll(fds []PollFd, timeout int) (n int, err error) {
178	if len(fds) == 0 {
179		return poll(nil, 0, timeout)
180	}
181	return poll(&fds[0], len(fds), timeout)
182}
183
184//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
185
186func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
187	cmdlineLen := len(cmdline)
188	if cmdlineLen > 0 {
189		// Account for the additional NULL byte added by
190		// BytePtrFromString in kexecFileLoad. The kexec_file_load
191		// syscall expects a NULL-terminated string.
192		cmdlineLen++
193	}
194	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
195}