github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/unix/syscall_linux_s390x.go (about)

     1  // Copyright 2016 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  // +build s390x,linux
     6  
     7  package unix
     8  
     9  import (
    10  	"unsafe"
    11  )
    12  
    13  //sys	Dup2(oldfd int, newfd int) (err error)
    14  //sysnb	EpollCreate(size int) (fd int, err error)
    15  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
    16  //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
    17  //sys	Fchown(fd int, uid int, gid int) (err error)
    18  //sys	Fstat(fd int, stat *Stat_t) (err error)
    19  //sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
    20  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
    21  //sys	Ftruncate(fd int, length int64) (err error)
    22  //sysnb	Getegid() (egid int)
    23  //sysnb	Geteuid() (euid int)
    24  //sysnb	Getgid() (gid int)
    25  //sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
    26  //sysnb	Getuid() (uid int)
    27  //sysnb	InotifyInit() (fd int, err error)
    28  //sys	Lchown(path string, uid int, gid int) (err error)
    29  //sys	Lstat(path string, stat *Stat_t) (err error)
    30  //sys	Pause() (err error)
    31  //sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    32  //sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    33  //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    34  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
    35  //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
    36  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
    37  //sys	Setfsgid(gid int) (err error)
    38  //sys	Setfsuid(uid int) (err error)
    39  //sysnb	Setregid(rgid int, egid int) (err error)
    40  //sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
    41  //sysnb	Setresuid(ruid int, euid int, suid int) (err error)
    42  //sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
    43  //sysnb	Setreuid(ruid int, euid int) (err error)
    44  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
    45  //sys	Stat(path string, stat *Stat_t) (err error)
    46  //sys	Statfs(path string, buf *Statfs_t) (err error)
    47  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
    48  //sys	Truncate(path string, length int64) (err error)
    49  //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
    50  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
    51  //sysnb	setgroups(n int, list *_Gid_t) (err error)
    52  
    53  //sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
    54  //sysnb	Gettimeofday(tv *Timeval) (err error)
    55  
    56  func Time(t *Time_t) (tt Time_t, err error) {
    57  	var tv Timeval
    58  	err = Gettimeofday(&tv)
    59  	if err != nil {
    60  		return 0, err
    61  	}
    62  	if t != nil {
    63  		*t = Time_t(tv.Sec)
    64  	}
    65  	return Time_t(tv.Sec), nil
    66  }
    67  
    68  //sys	Utime(path string, buf *Utimbuf) (err error)
    69  //sys	utimes(path string, times *[2]Timeval) (err error)
    70  
    71  func setTimespec(sec, nsec int64) Timespec {
    72  	return Timespec{Sec: sec, Nsec: nsec}
    73  }
    74  
    75  func setTimeval(sec, usec int64) Timeval {
    76  	return Timeval{Sec: sec, Usec: usec}
    77  }
    78  
    79  //sysnb pipe2(p *[2]_C_int, flags int) (err error)
    80  
    81  func Pipe(p []int) (err error) {
    82  	if len(p) != 2 {
    83  		return EINVAL
    84  	}
    85  	var pp [2]_C_int
    86  	err = pipe2(&pp, 0) // pipe2 is the same as pipe when flags are set to 0.
    87  	p[0] = int(pp[0])
    88  	p[1] = int(pp[1])
    89  	return
    90  }
    91  
    92  func Pipe2(p []int, flags int) (err error) {
    93  	if len(p) != 2 {
    94  		return EINVAL
    95  	}
    96  	var pp [2]_C_int
    97  	err = pipe2(&pp, flags)
    98  	p[0] = int(pp[0])
    99  	p[1] = int(pp[1])
   100  	return
   101  }
   102  
   103  func Ioperm(from int, num int, on int) (err error) {
   104  	return ENOSYS
   105  }
   106  
   107  func Iopl(level int) (err error) {
   108  	return ENOSYS
   109  }
   110  
   111  func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
   112  
   113  func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
   114  
   115  func (iov *Iovec) SetLen(length int) {
   116  	iov.Len = uint64(length)
   117  }
   118  
   119  func (msghdr *Msghdr) SetControllen(length int) {
   120  	msghdr.Controllen = uint64(length)
   121  }
   122  
   123  func (cmsg *Cmsghdr) SetLen(length int) {
   124  	cmsg.Len = uint64(length)
   125  }
   126  
   127  // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
   128  // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
   129  func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
   130  	mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
   131  	r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
   132  	xaddr = uintptr(r0)
   133  	if e1 != 0 {
   134  		err = errnoErr(e1)
   135  	}
   136  	return
   137  }
   138  
   139  // On s390x Linux, all the socket calls go through an extra indirection.
   140  // The arguments to the underlying system call (SYS_SOCKETCALL) are the
   141  // number below and a pointer to an array of uintptr.
   142  const (
   143  	// see linux/net.h
   144  	netSocket      = 1
   145  	netBind        = 2
   146  	netConnect     = 3
   147  	netListen      = 4
   148  	netAccept      = 5
   149  	netGetSockName = 6
   150  	netGetPeerName = 7
   151  	netSocketPair  = 8
   152  	netSend        = 9
   153  	netRecv        = 10
   154  	netSendTo      = 11
   155  	netRecvFrom    = 12
   156  	netShutdown    = 13
   157  	netSetSockOpt  = 14
   158  	netGetSockOpt  = 15
   159  	netSendMsg     = 16
   160  	netRecvMsg     = 17
   161  	netAccept4     = 18
   162  	netRecvMMsg    = 19
   163  	netSendMMsg    = 20
   164  )
   165  
   166  func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (int, error) {
   167  	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
   168  	fd, _, err := Syscall(SYS_SOCKETCALL, netAccept, uintptr(unsafe.Pointer(&args)), 0)
   169  	if err != 0 {
   170  		return 0, err
   171  	}
   172  	return int(fd), nil
   173  }
   174  
   175  func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) {
   176  	args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)}
   177  	fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0)
   178  	if err != 0 {
   179  		return 0, err
   180  	}
   181  	return int(fd), nil
   182  }
   183  
   184  func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
   185  	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
   186  	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0)
   187  	if err != 0 {
   188  		return err
   189  	}
   190  	return nil
   191  }
   192  
   193  func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
   194  	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
   195  	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0)
   196  	if err != 0 {
   197  		return err
   198  	}
   199  	return nil
   200  }
   201  
   202  func socketpair(domain int, typ int, flags int, fd *[2]int32) error {
   203  	args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))}
   204  	_, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0)
   205  	if err != 0 {
   206  		return err
   207  	}
   208  	return nil
   209  }
   210  
   211  func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error {
   212  	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
   213  	_, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0)
   214  	if err != 0 {
   215  		return err
   216  	}
   217  	return nil
   218  }
   219  
   220  func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error {
   221  	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
   222  	_, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0)
   223  	if err != 0 {
   224  		return err
   225  	}
   226  	return nil
   227  }
   228  
   229  func socket(domain int, typ int, proto int) (int, error) {
   230  	args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)}
   231  	fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0)
   232  	if err != 0 {
   233  		return 0, err
   234  	}
   235  	return int(fd), nil
   236  }
   237  
   238  func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error {
   239  	args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))}
   240  	_, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
   241  	if err != 0 {
   242  		return err
   243  	}
   244  	return nil
   245  }
   246  
   247  func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error {
   248  	args := [4]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val)}
   249  	_, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
   250  	if err != 0 {
   251  		return err
   252  	}
   253  	return nil
   254  }
   255  
   256  func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) {
   257  	var base uintptr
   258  	if len(p) > 0 {
   259  		base = uintptr(unsafe.Pointer(&p[0]))
   260  	}
   261  	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))}
   262  	n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0)
   263  	if err != 0 {
   264  		return 0, err
   265  	}
   266  	return int(n), nil
   267  }
   268  
   269  func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error {
   270  	var base uintptr
   271  	if len(p) > 0 {
   272  		base = uintptr(unsafe.Pointer(&p[0]))
   273  	}
   274  	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)}
   275  	_, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0)
   276  	if err != 0 {
   277  		return err
   278  	}
   279  	return nil
   280  }
   281  
   282  func recvmsg(s int, msg *Msghdr, flags int) (int, error) {
   283  	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
   284  	n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0)
   285  	if err != 0 {
   286  		return 0, err
   287  	}
   288  	return int(n), nil
   289  }
   290  
   291  func sendmsg(s int, msg *Msghdr, flags int) (int, error) {
   292  	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
   293  	n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0)
   294  	if err != 0 {
   295  		return 0, err
   296  	}
   297  	return int(n), nil
   298  }
   299  
   300  func Listen(s int, n int) error {
   301  	args := [2]uintptr{uintptr(s), uintptr(n)}
   302  	_, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0)
   303  	if err != 0 {
   304  		return err
   305  	}
   306  	return nil
   307  }
   308  
   309  func Shutdown(s, how int) error {
   310  	args := [2]uintptr{uintptr(s), uintptr(how)}
   311  	_, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0)
   312  	if err != 0 {
   313  		return err
   314  	}
   315  	return nil
   316  }
   317  
   318  //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
   319  
   320  func Poll(fds []PollFd, timeout int) (n int, err error) {
   321  	if len(fds) == 0 {
   322  		return poll(nil, 0, timeout)
   323  	}
   324  	return poll(&fds[0], len(fds), timeout)
   325  }
   326  
   327  //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
   328  
   329  func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
   330  	cmdlineLen := len(cmdline)
   331  	if cmdlineLen > 0 {
   332  		// Account for the additional NULL byte added by
   333  		// BytePtrFromString in kexecFileLoad. The kexec_file_load
   334  		// syscall expects a NULL-terminated string.
   335  		cmdlineLen++
   336  	}
   337  	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
   338  }