Source file src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_386.go

     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	// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
     6	// so that go vet can check that they are correct.
     7	
     8	// +build 386,linux
     9	
    10	package unix
    11	
    12	import (
    13		"unsafe"
    14	)
    15	
    16	func setTimespec(sec, nsec int64) Timespec {
    17		return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
    18	}
    19	
    20	func setTimeval(sec, usec int64) Timeval {
    21		return Timeval{Sec: int32(sec), Usec: int32(usec)}
    22	}
    23	
    24	//sysnb	pipe(p *[2]_C_int) (err error)
    25	
    26	func Pipe(p []int) (err error) {
    27		if len(p) != 2 {
    28			return EINVAL
    29		}
    30		var pp [2]_C_int
    31		err = pipe(&pp)
    32		p[0] = int(pp[0])
    33		p[1] = int(pp[1])
    34		return
    35	}
    36	
    37	//sysnb pipe2(p *[2]_C_int, flags int) (err error)
    38	
    39	func Pipe2(p []int, flags int) (err error) {
    40		if len(p) != 2 {
    41			return EINVAL
    42		}
    43		var pp [2]_C_int
    44		err = pipe2(&pp, flags)
    45		p[0] = int(pp[0])
    46		p[1] = int(pp[1])
    47		return
    48	}
    49	
    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	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    72	//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
    73	//sys	Setfsgid(gid int) (err error) = SYS_SETFSGID32
    74	//sys	Setfsuid(uid int) (err error) = SYS_SETFSUID32
    75	//sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
    76	//sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
    77	//sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
    78	//sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
    79	//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
    80	//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
    81	//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
    82	//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
    83	//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
    84	//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
    85	//sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
    86	//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
    87	
    88	//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
    89	//sys	Pause() (err error)
    90	
    91	func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
    92		page := uintptr(offset / 4096)
    93		if offset != int64(page)*4096 {
    94			return 0, EINVAL
    95		}
    96		return mmap2(addr, length, prot, flags, fd, page)
    97	}
    98	
    99	type rlimit32 struct {
   100		Cur uint32
   101		Max uint32
   102	}
   103	
   104	//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
   105	
   106	const rlimInf32 = ^uint32(0)
   107	const rlimInf64 = ^uint64(0)
   108	
   109	func Getrlimit(resource int, rlim *Rlimit) (err error) {
   110		err = prlimit(0, resource, nil, rlim)
   111		if err != ENOSYS {
   112			return err
   113		}
   114	
   115		rl := rlimit32{}
   116		err = getrlimit(resource, &rl)
   117		if err != nil {
   118			return
   119		}
   120	
   121		if rl.Cur == rlimInf32 {
   122			rlim.Cur = rlimInf64
   123		} else {
   124			rlim.Cur = uint64(rl.Cur)
   125		}
   126	
   127		if rl.Max == rlimInf32 {
   128			rlim.Max = rlimInf64
   129		} else {
   130			rlim.Max = uint64(rl.Max)
   131		}
   132		return
   133	}
   134	
   135	//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
   136	
   137	func Setrlimit(resource int, rlim *Rlimit) (err error) {
   138		err = prlimit(0, resource, rlim, nil)
   139		if err != ENOSYS {
   140			return err
   141		}
   142	
   143		rl := rlimit32{}
   144		if rlim.Cur == rlimInf64 {
   145			rl.Cur = rlimInf32
   146		} else if rlim.Cur < uint64(rlimInf32) {
   147			rl.Cur = uint32(rlim.Cur)
   148		} else {
   149			return EINVAL
   150		}
   151		if rlim.Max == rlimInf64 {
   152			rl.Max = rlimInf32
   153		} else if rlim.Max < uint64(rlimInf32) {
   154			rl.Max = uint32(rlim.Max)
   155		} else {
   156			return EINVAL
   157		}
   158	
   159		return setrlimit(resource, &rl)
   160	}
   161	
   162	func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
   163		newoffset, errno := seek(fd, offset, whence)
   164		if errno != 0 {
   165			return 0, errno
   166		}
   167		return newoffset, nil
   168	}
   169	
   170	//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
   171	//sysnb	Gettimeofday(tv *Timeval) (err error)
   172	//sysnb	Time(t *Time_t) (tt Time_t, err error)
   173	//sys	Utime(path string, buf *Utimbuf) (err error)
   174	//sys	utimes(path string, times *[2]Timeval) (err error)
   175	
   176	// On x86 Linux, all the socket calls go through an extra indirection,
   177	// I think because the 5-register system call interface can't handle
   178	// the 6-argument calls like sendto and recvfrom. Instead the
   179	// arguments to the underlying system call are the number below
   180	// and a pointer to an array of uintptr. We hide the pointer in the
   181	// socketcall assembly to avoid allocation on every system call.
   182	
   183	const (
   184		// see linux/net.h
   185		_SOCKET      = 1
   186		_BIND        = 2
   187		_CONNECT     = 3
   188		_LISTEN      = 4
   189		_ACCEPT      = 5
   190		_GETSOCKNAME = 6
   191		_GETPEERNAME = 7
   192		_SOCKETPAIR  = 8
   193		_SEND        = 9
   194		_RECV        = 10
   195		_SENDTO      = 11
   196		_RECVFROM    = 12
   197		_SHUTDOWN    = 13
   198		_SETSOCKOPT  = 14
   199		_GETSOCKOPT  = 15
   200		_SENDMSG     = 16
   201		_RECVMSG     = 17
   202		_ACCEPT4     = 18
   203		_RECVMMSG    = 19
   204		_SENDMMSG    = 20
   205	)
   206	
   207	func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
   208		fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
   209		if e != 0 {
   210			err = e
   211		}
   212		return
   213	}
   214	
   215	func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
   216		fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
   217		if e != 0 {
   218			err = e
   219		}
   220		return
   221	}
   222	
   223	func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
   224		_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
   225		if e != 0 {
   226			err = e
   227		}
   228		return
   229	}
   230	
   231	func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
   232		_, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
   233		if e != 0 {
   234			err = e
   235		}
   236		return
   237	}
   238	
   239	func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
   240		_, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
   241		if e != 0 {
   242			err = e
   243		}
   244		return
   245	}
   246	
   247	func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
   248		_, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
   249		if e != 0 {
   250			err = e
   251		}
   252		return
   253	}
   254	
   255	func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
   256		_, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
   257		if e != 0 {
   258			err = e
   259		}
   260		return
   261	}
   262	
   263	func socket(domain int, typ int, proto int) (fd int, err error) {
   264		fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
   265		if e != 0 {
   266			err = e
   267		}
   268		return
   269	}
   270	
   271	func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
   272		_, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
   273		if e != 0 {
   274			err = e
   275		}
   276		return
   277	}
   278	
   279	func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
   280		_, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
   281		if e != 0 {
   282			err = e
   283		}
   284		return
   285	}
   286	
   287	func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
   288		var base uintptr
   289		if len(p) > 0 {
   290			base = uintptr(unsafe.Pointer(&p[0]))
   291		}
   292		n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
   293		if e != 0 {
   294			err = e
   295		}
   296		return
   297	}
   298	
   299	func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
   300		var base uintptr
   301		if len(p) > 0 {
   302			base = uintptr(unsafe.Pointer(&p[0]))
   303		}
   304		_, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
   305		if e != 0 {
   306			err = e
   307		}
   308		return
   309	}
   310	
   311	func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
   312		n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
   313		if e != 0 {
   314			err = e
   315		}
   316		return
   317	}
   318	
   319	func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
   320		n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
   321		if e != 0 {
   322			err = e
   323		}
   324		return
   325	}
   326	
   327	func Listen(s int, n int) (err error) {
   328		_, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
   329		if e != 0 {
   330			err = e
   331		}
   332		return
   333	}
   334	
   335	func Shutdown(s, how int) (err error) {
   336		_, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
   337		if e != 0 {
   338			err = e
   339		}
   340		return
   341	}
   342	
   343	func Fstatfs(fd int, buf *Statfs_t) (err error) {
   344		_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   345		if e != 0 {
   346			err = e
   347		}
   348		return
   349	}
   350	
   351	func Statfs(path string, buf *Statfs_t) (err error) {
   352		pathp, err := BytePtrFromString(path)
   353		if err != nil {
   354			return err
   355		}
   356		_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   357		if e != 0 {
   358			err = e
   359		}
   360		return
   361	}
   362	
   363	func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
   364	
   365	func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
   366	
   367	func (iov *Iovec) SetLen(length int) {
   368		iov.Len = uint32(length)
   369	}
   370	
   371	func (msghdr *Msghdr) SetControllen(length int) {
   372		msghdr.Controllen = uint32(length)
   373	}
   374	
   375	func (cmsg *Cmsghdr) SetLen(length int) {
   376		cmsg.Len = uint32(length)
   377	}
   378	
   379	//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
   380	
   381	func Poll(fds []PollFd, timeout int) (n int, err error) {
   382		if len(fds) == 0 {
   383			return poll(nil, 0, timeout)
   384		}
   385		return poll(&fds[0], len(fds), timeout)
   386	}
   387	

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