github.com/c12o16h1/go/src@v0.0.0-20200114212001-5a151c0f00ed/syscall/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 package syscall 6 7 import "unsafe" 8 9 const ( 10 _SYS_dup = SYS_DUP2 11 _SYS_setgroups = SYS_SETGROUPS 12 ) 13 14 //sys Dup2(oldfd int, newfd int) (err error) 15 //sysnb EpollCreate(size int) (fd int, err error) 16 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 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) = SYS_GETRLIMIT 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) = SYS_SYNC_FILE_RANGE 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 func Pipe(p []int) (err error) { 80 if len(p) != 2 { 81 return EINVAL 82 } 83 var pp [2]_C_int 84 err = pipe2(&pp, 0) 85 p[0] = int(pp[0]) 86 p[1] = int(pp[1]) 87 return 88 } 89 90 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 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 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. 104 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. 105 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 106 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} 107 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) 108 xaddr = uintptr(r0) 109 if e1 != 0 { 110 err = errnoErr(e1) 111 } 112 return 113 } 114 115 // On s390x Linux, all the socket calls go through an extra indirection. 116 // The arguments to the underlying system call are the number below 117 // and a pointer to an array of uintptr. We hide the pointer in the 118 // socketcall assembly to avoid allocation on every system call. 119 120 const ( 121 // see linux/net.h 122 _SOCKET = 1 123 _BIND = 2 124 _CONNECT = 3 125 _LISTEN = 4 126 _ACCEPT = 5 127 _GETSOCKNAME = 6 128 _GETPEERNAME = 7 129 _SOCKETPAIR = 8 130 _SEND = 9 131 _RECV = 10 132 _SENDTO = 11 133 _RECVFROM = 12 134 _SHUTDOWN = 13 135 _SETSOCKOPT = 14 136 _GETSOCKOPT = 15 137 _SENDMSG = 16 138 _RECVMSG = 17 139 _ACCEPT4 = 18 140 _RECVMMSG = 19 141 _SENDMMSG = 20 142 ) 143 144 func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno) 145 func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno) 146 147 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { 148 fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 149 if e != 0 { 150 err = e 151 } 152 return 153 } 154 155 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) { 156 fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0) 157 if e != 0 { 158 err = e 159 } 160 return 161 } 162 163 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 164 _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 165 if e != 0 { 166 err = e 167 } 168 return 169 } 170 171 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 172 _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 173 if e != 0 { 174 err = e 175 } 176 return 177 } 178 179 func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) { 180 _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0) 181 if e != 0 { 182 err = e 183 } 184 return 185 } 186 187 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 188 _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 189 if e != 0 { 190 err = e 191 } 192 return 193 } 194 195 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 196 _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 197 if e != 0 { 198 err = e 199 } 200 return 201 } 202 203 func socket(domain int, typ int, proto int) (fd int, err error) { 204 fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) 205 if e != 0 { 206 err = e 207 } 208 return 209 } 210 211 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { 212 _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) 213 if e != 0 { 214 err = e 215 } 216 return 217 } 218 219 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { 220 _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0) 221 if e != 0 { 222 err = e 223 } 224 return 225 } 226 227 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { 228 var base uintptr 229 if len(p) > 0 { 230 base = uintptr(unsafe.Pointer(&p[0])) 231 } 232 n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))) 233 if e != 0 { 234 err = e 235 } 236 return 237 } 238 239 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { 240 var base uintptr 241 if len(p) > 0 { 242 base = uintptr(unsafe.Pointer(&p[0])) 243 } 244 _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)) 245 if e != 0 { 246 err = e 247 } 248 return 249 } 250 251 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { 252 n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 253 if e != 0 { 254 err = e 255 } 256 return 257 } 258 259 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { 260 n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 261 if e != 0 { 262 err = e 263 } 264 return 265 } 266 267 func Listen(s int, n int) (err error) { 268 _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0) 269 if e != 0 { 270 err = e 271 } 272 return 273 } 274 275 func Shutdown(s, how int) (err error) { 276 _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0) 277 if e != 0 { 278 err = e 279 } 280 return 281 } 282 283 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 284 285 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 286 287 func (iov *Iovec) SetLen(length int) { 288 iov.Len = uint64(length) 289 } 290 291 func (msghdr *Msghdr) SetControllen(length int) { 292 msghdr.Controllen = uint64(length) 293 } 294 295 func (cmsg *Cmsghdr) SetLen(length int) { 296 cmsg.Len = uint64(length) 297 } 298 299 func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)