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
  7package unix
  8
  9//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
 10//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
 11//sys	Fchown(fd int, uid int, gid int) (err error)
 12//sys	Fstat(fd int, stat *Stat_t) (err error)
 13//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
 14//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
 15//sys	Ftruncate(fd int, length int64) (err error)
 16//sysnb	Getegid() (egid int)
 17//sysnb	Geteuid() (euid int)
 18//sysnb	Getgid() (gid int)
 19//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
 20//sysnb	Getuid() (uid int)
 21//sys	Ioperm(from int, num int, on int) (err error)
 22//sys	Iopl(level int) (err error)
 23//sys	Lchown(path string, uid int, gid int) (err error)
 24//sys	Listen(s int, n int) (err error)
 25
 26func Lstat(path string, stat *Stat_t) (err error) {
 27	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
 28}
 29
 30//sys	MemfdSecret(flags int) (fd int, err error)
 31//sys	Pause() (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 pselect6(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//sys	Shutdown(fd int, how int) (err error)
 49//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
 50
 51func Stat(path string, stat *Stat_t) (err error) {
 52	// Use fstatat, because Android's seccomp policy blocks stat.
 53	return Fstatat(AT_FDCWD, path, stat, 0)
 54}
 55
 56//sys	Statfs(path string, buf *Statfs_t) (err error)
 57//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
 58//sys	Truncate(path string, length int64) (err error)
 59//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
 60//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
 61//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 62//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 63//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
 64//sysnb	setgroups(n int, list *_Gid_t) (err error)
 65//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
 66//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
 67//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
 68//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
 69//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 70//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 71//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
 72//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
 73//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
 74//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
 75//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
 76
 77//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
 78
 79func Gettimeofday(tv *Timeval) (err error) {
 80	errno := gettimeofday(tv)
 81	if errno != 0 {
 82		return errno
 83	}
 84	return nil
 85}
 86
 87func Time(t *Time_t) (tt Time_t, err error) {
 88	var tv Timeval
 89	errno := gettimeofday(&tv)
 90	if errno != 0 {
 91		return 0, errno
 92	}
 93	if t != nil {
 94		*t = Time_t(tv.Sec)
 95	}
 96	return Time_t(tv.Sec), nil
 97}
 98
 99//sys	Utime(path string, buf *Utimbuf) (err error)
100//sys	utimes(path string, times *[2]Timeval) (err error)
101
102func setTimespec(sec, nsec int64) Timespec {
103	return Timespec{Sec: sec, Nsec: nsec}
104}
105
106func setTimeval(sec, usec int64) Timeval {
107	return Timeval{Sec: sec, Usec: usec}
108}
109
110func (r *PtraceRegs) PC() uint64 { return r.Rip }
111
112func (r *PtraceRegs) SetPC(pc uint64) { r.Rip = pc }
113
114func (iov *Iovec) SetLen(length int) {
115	iov.Len = uint64(length)
116}
117
118func (msghdr *Msghdr) SetControllen(length int) {
119	msghdr.Controllen = uint64(length)
120}
121
122func (msghdr *Msghdr) SetIovlen(length int) {
123	msghdr.Iovlen = uint64(length)
124}
125
126func (cmsg *Cmsghdr) SetLen(length int) {
127	cmsg.Len = uint64(length)
128}
129
130func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
131	rsa.Service_name_len = uint64(length)
132}
133
134//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
135
136func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
137	cmdlineLen := len(cmdline)
138	if cmdlineLen > 0 {
139		// Account for the additional NULL byte added by
140		// BytePtrFromString in kexecFileLoad. The kexec_file_load
141		// syscall expects a NULL-terminated string.
142		cmdlineLen++
143	}
144	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
145}