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 7package unix 8 9import ( 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 56func 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 71func setTimespec(sec, nsec int64) Timespec { 72 return Timespec{Sec: sec, Nsec: nsec} 73} 74 75func 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 81func 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 92func 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 103func Ioperm(from int, num int, on int) (err error) { 104 return ENOSYS 105} 106 107func Iopl(level int) (err error) { 108 return ENOSYS 109} 110 111func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 112 113func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 114 115func (iov *Iovec) SetLen(length int) { 116 iov.Len = uint64(length) 117} 118 119func (msghdr *Msghdr) SetControllen(length int) { 120 msghdr.Controllen = uint64(length) 121} 122 123func (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>. 129func 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. 142const ( 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 166func 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 175func 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 184func 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 193func 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 202func 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 211func 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 220func 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 229func 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 238func 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 247func 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 256func 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 269func 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 282func 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 291func 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 300func 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 309func 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 320func 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 329func 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