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 }