Source file src/pkg/cmd/vendor/golang.org/x/sys/unix/syscall_linux_s390x.go

     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	}
   339	

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