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