github.com/zebozhuang/go@v0.0.0-20200207033046-f8a98f6f5c5d/src/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_getdents = SYS_GETDENTS64 12 _SYS_setgroups = SYS_SETGROUPS 13 ) 14 15 //sys Dup2(oldfd int, newfd int) (err error) 16 //sys Fchown(fd int, uid int, gid int) (err error) 17 //sys Fstat(fd int, stat *Stat_t) (err error) 18 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 19 //sys Ftruncate(fd int, length int64) (err error) 20 //sysnb Getegid() (egid int) 21 //sysnb Geteuid() (euid int) 22 //sysnb Getgid() (gid int) 23 //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT 24 //sysnb Getuid() (uid int) 25 //sysnb InotifyInit() (fd int, err error) 26 //sys Lchown(path string, uid int, gid int) (err error) 27 //sys Lstat(path string, stat *Stat_t) (err error) 28 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 29 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 30 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 31 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) 32 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 33 //sys Setfsgid(gid int) (err error) 34 //sys Setfsuid(uid int) (err error) 35 //sysnb Setregid(rgid int, egid int) (err error) 36 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 37 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 38 //sysnb Setrlimit(resource int, rlim *Rlimit) (err error) 39 //sysnb Setreuid(ruid int, euid int) (err error) 40 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 41 //sys Stat(path string, stat *Stat_t) (err error) 42 //sys Statfs(path string, buf *Statfs_t) (err error) 43 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) = SYS_SYNC_FILE_RANGE 44 //sys Truncate(path string, length int64) (err error) 45 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 46 //sysnb setgroups(n int, list *_Gid_t) (err error) 47 48 //sysnb Gettimeofday(tv *Timeval) (err error) 49 50 func Time(t *Time_t) (tt Time_t, err error) { 51 var tv Timeval 52 err = Gettimeofday(&tv) 53 if err != nil { 54 return 0, err 55 } 56 if t != nil { 57 *t = Time_t(tv.Sec) 58 } 59 return Time_t(tv.Sec), nil 60 } 61 62 func setTimespec(sec, nsec int64) Timespec { 63 return Timespec{Sec: sec, Nsec: nsec} 64 } 65 66 func setTimeval(sec, usec int64) Timeval { 67 return Timeval{Sec: sec, Usec: usec} 68 } 69 70 func Pipe(p []int) (err error) { 71 if len(p) != 2 { 72 return EINVAL 73 } 74 var pp [2]_C_int 75 err = pipe2(&pp, 0) 76 p[0] = int(pp[0]) 77 p[1] = int(pp[1]) 78 return 79 } 80 81 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 82 83 func Pipe2(p []int, flags int) (err error) { 84 if len(p) != 2 { 85 return EINVAL 86 } 87 var pp [2]_C_int 88 err = pipe2(&pp, flags) 89 p[0] = int(pp[0]) 90 p[1] = int(pp[1]) 91 return 92 } 93 94 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. 95 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. 96 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 97 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} 98 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) 99 xaddr = uintptr(r0) 100 if e1 != 0 { 101 err = errnoErr(e1) 102 } 103 return 104 } 105 106 // On s390x Linux, all the socket calls go through an extra indirection. 107 // The arguments to the underlying system call are the number below 108 // and a pointer to an array of uintptr. We hide the pointer in the 109 // socketcall assembly to avoid allocation on every system call. 110 111 const ( 112 // see linux/net.h 113 _SOCKET = 1 114 _BIND = 2 115 _CONNECT = 3 116 _LISTEN = 4 117 _ACCEPT = 5 118 _GETSOCKNAME = 6 119 _GETPEERNAME = 7 120 _SOCKETPAIR = 8 121 _SEND = 9 122 _RECV = 10 123 _SENDTO = 11 124 _RECVFROM = 12 125 _SHUTDOWN = 13 126 _SETSOCKOPT = 14 127 _GETSOCKOPT = 15 128 _SENDMSG = 16 129 _RECVMSG = 17 130 _ACCEPT4 = 18 131 _RECVMMSG = 19 132 _SENDMMSG = 20 133 ) 134 135 func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno) 136 func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno) 137 138 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { 139 fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 140 if e != 0 { 141 err = e 142 } 143 return 144 } 145 146 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) { 147 fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0) 148 if e != 0 { 149 err = e 150 } 151 return 152 } 153 154 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 155 _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 156 if e != 0 { 157 err = e 158 } 159 return 160 } 161 162 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 163 _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 164 if e != 0 { 165 err = e 166 } 167 return 168 } 169 170 func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) { 171 _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0) 172 if e != 0 { 173 err = e 174 } 175 return 176 } 177 178 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 179 _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 180 if e != 0 { 181 err = e 182 } 183 return 184 } 185 186 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 187 _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 188 if e != 0 { 189 err = e 190 } 191 return 192 } 193 194 func socket(domain int, typ int, proto int) (fd int, err error) { 195 fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) 196 if e != 0 { 197 err = e 198 } 199 return 200 } 201 202 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { 203 _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) 204 if e != 0 { 205 err = e 206 } 207 return 208 } 209 210 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { 211 _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0) 212 if e != 0 { 213 err = e 214 } 215 return 216 } 217 218 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { 219 var base uintptr 220 if len(p) > 0 { 221 base = uintptr(unsafe.Pointer(&p[0])) 222 } 223 n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))) 224 if e != 0 { 225 err = e 226 } 227 return 228 } 229 230 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { 231 var base uintptr 232 if len(p) > 0 { 233 base = uintptr(unsafe.Pointer(&p[0])) 234 } 235 _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)) 236 if e != 0 { 237 err = e 238 } 239 return 240 } 241 242 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { 243 n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 244 if e != 0 { 245 err = e 246 } 247 return 248 } 249 250 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { 251 n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 252 if e != 0 { 253 err = e 254 } 255 return 256 } 257 258 func Listen(s int, n int) (err error) { 259 _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0) 260 if e != 0 { 261 err = e 262 } 263 return 264 } 265 266 func Shutdown(s, how int) (err error) { 267 _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0) 268 if e != 0 { 269 err = e 270 } 271 return 272 } 273 274 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 275 276 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 277 278 func (iov *Iovec) SetLen(length int) { 279 iov.Len = uint64(length) 280 } 281 282 func (msghdr *Msghdr) SetControllen(length int) { 283 msghdr.Controllen = uint64(length) 284 } 285 286 func (cmsg *Cmsghdr) SetLen(length int) { 287 cmsg.Len = uint64(length) 288 } 289 290 func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) { 291 panic("not implemented") 292 }