1// Copyright 2009 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//go:build 386 && linux 6// +build 386,linux 7 8package unix 9 10import ( 11 "unsafe" 12) 13 14func setTimespec(sec, nsec int64) Timespec { 15 return Timespec{Sec: int32(sec), Nsec: int32(nsec)} 16} 17 18func setTimeval(sec, usec int64) Timeval { 19 return Timeval{Sec: int32(sec), Usec: int32(usec)} 20} 21 22//sysnb pipe(p *[2]_C_int) (err error) 23 24func Pipe(p []int) (err error) { 25 if len(p) != 2 { 26 return EINVAL 27 } 28 var pp [2]_C_int 29 err = pipe(&pp) 30 p[0] = int(pp[0]) 31 p[1] = int(pp[1]) 32 return 33} 34 35//sysnb pipe2(p *[2]_C_int, flags int) (err error) 36 37func Pipe2(p []int, flags int) (err error) { 38 if len(p) != 2 { 39 return EINVAL 40 } 41 var pp [2]_C_int 42 err = pipe2(&pp, flags) 43 p[0] = int(pp[0]) 44 p[1] = int(pp[1]) 45 return 46} 47 48// 64-bit file system and 32-bit uid calls 49// (386 default is 32-bit file system and 16-bit uid). 50//sys dup2(oldfd int, newfd int) (err error) 51//sysnb EpollCreate(size int) (fd int, err error) 52//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 53//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64 54//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 55//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 56//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 57//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 58//sysnb Getegid() (egid int) = SYS_GETEGID32 59//sysnb Geteuid() (euid int) = SYS_GETEUID32 60//sysnb Getgid() (gid int) = SYS_GETGID32 61//sysnb Getuid() (uid int) = SYS_GETUID32 62//sysnb InotifyInit() (fd int, err error) 63//sys Ioperm(from int, num int, on int) (err error) 64//sys Iopl(level int) (err error) 65//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 66//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 67//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 68//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 69//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 70//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 71//sys setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32 72//sys setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32 73//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 74//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 75//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 76//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 77//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 78//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 79//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) 80//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 81//sys Ustat(dev int, ubuf *Ustat_t) (err error) 82//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 83//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 84//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 85 86//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 87//sys Pause() (err error) 88 89func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 90 page := uintptr(offset / 4096) 91 if offset != int64(page)*4096 { 92 return 0, EINVAL 93 } 94 return mmap2(addr, length, prot, flags, fd, page) 95} 96 97type rlimit32 struct { 98 Cur uint32 99 Max uint32 100} 101 102//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT 103 104const rlimInf32 = ^uint32(0) 105const rlimInf64 = ^uint64(0) 106 107func Getrlimit(resource int, rlim *Rlimit) (err error) { 108 err = Prlimit(0, resource, nil, rlim) 109 if err != ENOSYS { 110 return err 111 } 112 113 rl := rlimit32{} 114 err = getrlimit(resource, &rl) 115 if err != nil { 116 return 117 } 118 119 if rl.Cur == rlimInf32 { 120 rlim.Cur = rlimInf64 121 } else { 122 rlim.Cur = uint64(rl.Cur) 123 } 124 125 if rl.Max == rlimInf32 { 126 rlim.Max = rlimInf64 127 } else { 128 rlim.Max = uint64(rl.Max) 129 } 130 return 131} 132 133//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 134 135func Setrlimit(resource int, rlim *Rlimit) (err error) { 136 err = Prlimit(0, resource, rlim, nil) 137 if err != ENOSYS { 138 return err 139 } 140 141 rl := rlimit32{} 142 if rlim.Cur == rlimInf64 { 143 rl.Cur = rlimInf32 144 } else if rlim.Cur < uint64(rlimInf32) { 145 rl.Cur = uint32(rlim.Cur) 146 } else { 147 return EINVAL 148 } 149 if rlim.Max == rlimInf64 { 150 rl.Max = rlimInf32 151 } else if rlim.Max < uint64(rlimInf32) { 152 rl.Max = uint32(rlim.Max) 153 } else { 154 return EINVAL 155 } 156 157 return setrlimit(resource, &rl) 158} 159 160func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 161 newoffset, errno := seek(fd, offset, whence) 162 if errno != 0 { 163 return 0, errno 164 } 165 return newoffset, nil 166} 167 168//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 169//sysnb Gettimeofday(tv *Timeval) (err error) 170//sysnb Time(t *Time_t) (tt Time_t, err error) 171//sys Utime(path string, buf *Utimbuf) (err error) 172//sys utimes(path string, times *[2]Timeval) (err error) 173 174// On x86 Linux, all the socket calls go through an extra indirection, 175// I think because the 5-register system call interface can't handle 176// the 6-argument calls like sendto and recvfrom. Instead the 177// arguments to the underlying system call are the number below 178// and a pointer to an array of uintptr. We hide the pointer in the 179// socketcall assembly to avoid allocation on every system call. 180 181const ( 182 // see linux/net.h 183 _SOCKET = 1 184 _BIND = 2 185 _CONNECT = 3 186 _LISTEN = 4 187 _ACCEPT = 5 188 _GETSOCKNAME = 6 189 _GETPEERNAME = 7 190 _SOCKETPAIR = 8 191 _SEND = 9 192 _RECV = 10 193 _SENDTO = 11 194 _RECVFROM = 12 195 _SHUTDOWN = 13 196 _SETSOCKOPT = 14 197 _GETSOCKOPT = 15 198 _SENDMSG = 16 199 _RECVMSG = 17 200 _ACCEPT4 = 18 201 _RECVMMSG = 19 202 _SENDMMSG = 20 203) 204 205func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { 206 fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 207 if e != 0 { 208 err = e 209 } 210 return 211} 212 213func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) { 214 fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0) 215 if e != 0 { 216 err = e 217 } 218 return 219} 220 221func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 222 _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 223 if e != 0 { 224 err = e 225 } 226 return 227} 228 229func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { 230 _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) 231 if e != 0 { 232 err = e 233 } 234 return 235} 236 237func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) { 238 _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0) 239 if e != 0 { 240 err = e 241 } 242 return 243} 244 245func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 246 _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 247 if e != 0 { 248 err = e 249 } 250 return 251} 252 253func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { 254 _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) 255 if e != 0 { 256 err = e 257 } 258 return 259} 260 261func socket(domain int, typ int, proto int) (fd int, err error) { 262 fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) 263 if e != 0 { 264 err = e 265 } 266 return 267} 268 269func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { 270 _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) 271 if e != 0 { 272 err = e 273 } 274 return 275} 276 277func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { 278 _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0) 279 if e != 0 { 280 err = e 281 } 282 return 283} 284 285func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { 286 var base uintptr 287 if len(p) > 0 { 288 base = uintptr(unsafe.Pointer(&p[0])) 289 } 290 n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))) 291 if e != 0 { 292 err = e 293 } 294 return 295} 296 297func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { 298 var base uintptr 299 if len(p) > 0 { 300 base = uintptr(unsafe.Pointer(&p[0])) 301 } 302 _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)) 303 if e != 0 { 304 err = e 305 } 306 return 307} 308 309func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { 310 n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 311 if e != 0 { 312 err = e 313 } 314 return 315} 316 317func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { 318 n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) 319 if e != 0 { 320 err = e 321 } 322 return 323} 324 325func Listen(s int, n int) (err error) { 326 _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0) 327 if e != 0 { 328 err = e 329 } 330 return 331} 332 333func Shutdown(s, how int) (err error) { 334 _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0) 335 if e != 0 { 336 err = e 337 } 338 return 339} 340 341func Fstatfs(fd int, buf *Statfs_t) (err error) { 342 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 343 if e != 0 { 344 err = e 345 } 346 return 347} 348 349func Statfs(path string, buf *Statfs_t) (err error) { 350 pathp, err := BytePtrFromString(path) 351 if err != nil { 352 return err 353 } 354 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 355 if e != 0 { 356 err = e 357 } 358 return 359} 360 361func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) } 362 363func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) } 364 365func (iov *Iovec) SetLen(length int) { 366 iov.Len = uint32(length) 367} 368 369func (msghdr *Msghdr) SetControllen(length int) { 370 msghdr.Controllen = uint32(length) 371} 372 373func (msghdr *Msghdr) SetIovlen(length int) { 374 msghdr.Iovlen = uint32(length) 375} 376 377func (cmsg *Cmsghdr) SetLen(length int) { 378 cmsg.Len = uint32(length) 379} 380 381func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 382 rsa.Service_name_len = uint32(length) 383} 384 385//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) 386 387func Poll(fds []PollFd, timeout int) (n int, err error) { 388 if len(fds) == 0 { 389 return poll(nil, 0, timeout) 390 } 391 return poll(&fds[0], len(fds), timeout) 392} 393