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.
5 // TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
6 // so that go vet can check that they are correct.
16 func setTimespec(sec, nsec int64) Timespec {
17 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
20 func setTimeval(sec, usec int64) Timeval {
21 return Timeval{Sec: int32(sec), Usec: int32(usec)}
24 //sysnb pipe(p *[2]_C_int) (err error)
26 func Pipe(p []int) (err error) {
37 //sysnb pipe2(p *[2]_C_int, flags int) (err error)
39 func Pipe2(p []int, flags int) (err error) {
44 err = pipe2(&pp, flags)
50 // 64-bit file system and 32-bit uid calls
51 // (386 default is 32-bit file system and 16-bit uid).
52 //sys Dup2(oldfd int, newfd int) (err error)
53 //sysnb EpollCreate(size int) (fd int, err error)
54 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
55 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64
56 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
57 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
58 //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
59 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
60 //sysnb Getegid() (egid int) = SYS_GETEGID32
61 //sysnb Geteuid() (euid int) = SYS_GETEUID32
62 //sysnb Getgid() (gid int) = SYS_GETGID32
63 //sysnb Getuid() (uid int) = SYS_GETUID32
64 //sysnb InotifyInit() (fd int, err error)
65 //sys Ioperm(from int, num int, on int) (err error)
66 //sys Iopl(level int) (err error)
67 //sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
68 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
69 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
70 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
71 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
72 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
73 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
74 //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
75 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
76 //sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
77 //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
78 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
79 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
80 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
81 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
82 //sys Ustat(dev int, ubuf *Ustat_t) (err error)
83 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
84 //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
85 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
87 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
88 //sys Pause() (err error)
90 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
91 page := uintptr(offset / 4096)
92 if offset != int64(page)*4096 {
95 return mmap2(addr, length, prot, flags, fd, page)
98 type rlimit32 struct {
103 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
105 const rlimInf32 = ^uint32(0)
106 const rlimInf64 = ^uint64(0)
108 func Getrlimit(resource int, rlim *Rlimit) (err error) {
109 err = prlimit(0, resource, nil, rlim)
115 err = getrlimit(resource, &rl)
120 if rl.Cur == rlimInf32 {
123 rlim.Cur = uint64(rl.Cur)
126 if rl.Max == rlimInf32 {
129 rlim.Max = uint64(rl.Max)
134 //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
136 func Setrlimit(resource int, rlim *Rlimit) (err error) {
137 err = prlimit(0, resource, rlim, nil)
143 if rlim.Cur == rlimInf64 {
145 } else if rlim.Cur < uint64(rlimInf32) {
146 rl.Cur = uint32(rlim.Cur)
150 if rlim.Max == rlimInf64 {
152 } else if rlim.Max < uint64(rlimInf32) {
153 rl.Max = uint32(rlim.Max)
158 return setrlimit(resource, &rl)
161 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
162 newoffset, errno := seek(fd, offset, whence)
166 return newoffset, nil
169 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
170 //sysnb Gettimeofday(tv *Timeval) (err error)
171 //sysnb Time(t *Time_t) (tt Time_t, err error)
172 //sys Utime(path string, buf *Utimbuf) (err error)
173 //sys utimes(path string, times *[2]Timeval) (err error)
175 // On x86 Linux, all the socket calls go through an extra indirection,
176 // I think because the 5-register system call interface can't handle
177 // the 6-argument calls like sendto and recvfrom. Instead the
178 // arguments to the underlying system call are the number below
179 // and a pointer to an array of uintptr. We hide the pointer in the
180 // socketcall assembly to avoid allocation on every system call.
206 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
207 fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
214 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
215 fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
222 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
223 _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
230 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
231 _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
238 func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
239 _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
246 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
247 _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
254 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
255 _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
262 func socket(domain int, typ int, proto int) (fd int, err error) {
263 fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
270 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
271 _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
278 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
279 _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
286 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
289 base = uintptr(unsafe.Pointer(&p[0]))
291 n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
298 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
301 base = uintptr(unsafe.Pointer(&p[0]))
303 _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
310 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
311 n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
318 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
319 n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
326 func Listen(s int, n int) (err error) {
327 _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
334 func Shutdown(s, how int) (err error) {
335 _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
342 func Fstatfs(fd int, buf *Statfs_t) (err error) {
343 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
350 func Statfs(path string, buf *Statfs_t) (err error) {
351 pathp, err := BytePtrFromString(path)
355 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
362 func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
364 func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
366 func (iov *Iovec) SetLen(length int) {
367 iov.Len = uint32(length)
370 func (msghdr *Msghdr) SetControllen(length int) {
371 msghdr.Controllen = uint32(length)
374 func (cmsg *Cmsghdr) SetLen(length int) {
375 cmsg.Len = uint32(length)
378 //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
380 func Poll(fds []PollFd, timeout int) (n int, err error) {
382 return poll(nil, 0, timeout)
384 return poll(&fds[0], len(fds), timeout)