rss-tools/vendor/golang.org/x/sys/unix/syscall_linux_386.go (view raw)
| 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 | |
| 7 | package unix |
| 8 | |
| 9 | import ( |
| 10 | "unsafe" |
| 11 | ) |
| 12 | |
| 13 | func setTimespec(sec, nsec int64) Timespec { |
| 14 | return Timespec{Sec: int32(sec), Nsec: int32(nsec)} |
| 15 | } |
| 16 | |
| 17 | func setTimeval(sec, usec int64) Timeval { |
| 18 | return Timeval{Sec: int32(sec), Usec: int32(usec)} |
| 19 | } |
| 20 | |
| 21 | // 64-bit file system and 32-bit uid calls |
| 22 | // (386 default is 32-bit file system and 16-bit uid). |
| 23 | //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) |
| 24 | //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64 |
| 25 | //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 |
| 26 | //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 |
| 27 | //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 |
| 28 | //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 |
| 29 | //sysnb Getegid() (egid int) = SYS_GETEGID32 |
| 30 | //sysnb Geteuid() (euid int) = SYS_GETEUID32 |
| 31 | //sysnb Getgid() (gid int) = SYS_GETGID32 |
| 32 | //sysnb Getuid() (uid int) = SYS_GETUID32 |
| 33 | //sys Ioperm(from int, num int, on int) (err error) |
| 34 | //sys Iopl(level int) (err error) |
| 35 | //sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 |
| 36 | //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 |
| 37 | //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 |
| 38 | //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 |
| 39 | //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
| 40 | //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 |
| 41 | //sys setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32 |
| 42 | //sys setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32 |
| 43 | //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) |
| 44 | //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 |
| 45 | //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) |
| 46 | //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 |
| 47 | //sys Ustat(dev int, ubuf *Ustat_t) (err error) |
| 48 | //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 |
| 49 | //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 |
| 50 | //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT |
| 51 | |
| 52 | //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) |
| 53 | //sys Pause() (err error) |
| 54 | |
| 55 | func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { |
| 56 | page := uintptr(offset / 4096) |
| 57 | if offset != int64(page)*4096 { |
| 58 | return 0, EINVAL |
| 59 | } |
| 60 | return mmap2(addr, length, prot, flags, fd, page) |
| 61 | } |
| 62 | |
| 63 | type rlimit32 struct { |
| 64 | Cur uint32 |
| 65 | Max uint32 |
| 66 | } |
| 67 | |
| 68 | //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT |
| 69 | |
| 70 | const rlimInf32 = ^uint32(0) |
| 71 | const rlimInf64 = ^uint64(0) |
| 72 | |
| 73 | func Getrlimit(resource int, rlim *Rlimit) (err error) { |
| 74 | err = Prlimit(0, resource, nil, rlim) |
| 75 | if err != ENOSYS { |
| 76 | return err |
| 77 | } |
| 78 | |
| 79 | rl := rlimit32{} |
| 80 | err = getrlimit(resource, &rl) |
| 81 | if err != nil { |
| 82 | return |
| 83 | } |
| 84 | |
| 85 | if rl.Cur == rlimInf32 { |
| 86 | rlim.Cur = rlimInf64 |
| 87 | } else { |
| 88 | rlim.Cur = uint64(rl.Cur) |
| 89 | } |
| 90 | |
| 91 | if rl.Max == rlimInf32 { |
| 92 | rlim.Max = rlimInf64 |
| 93 | } else { |
| 94 | rlim.Max = uint64(rl.Max) |
| 95 | } |
| 96 | return |
| 97 | } |
| 98 | |
| 99 | func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { |
| 100 | newoffset, errno := seek(fd, offset, whence) |
| 101 | if errno != 0 { |
| 102 | return 0, errno |
| 103 | } |
| 104 | return newoffset, nil |
| 105 | } |
| 106 | |
| 107 | //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) |
| 108 | //sysnb Gettimeofday(tv *Timeval) (err error) |
| 109 | //sysnb Time(t *Time_t) (tt Time_t, err error) |
| 110 | //sys Utime(path string, buf *Utimbuf) (err error) |
| 111 | //sys utimes(path string, times *[2]Timeval) (err error) |
| 112 | |
| 113 | // On x86 Linux, all the socket calls go through an extra indirection, |
| 114 | // I think because the 5-register system call interface can't handle |
| 115 | // the 6-argument calls like sendto and recvfrom. Instead the |
| 116 | // 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 accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) { |
| 145 | fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0) |
| 146 | if e != 0 { |
| 147 | err = e |
| 148 | } |
| 149 | return |
| 150 | } |
| 151 | |
| 152 | func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { |
| 153 | _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) |
| 154 | if e != 0 { |
| 155 | err = e |
| 156 | } |
| 157 | return |
| 158 | } |
| 159 | |
| 160 | func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { |
| 161 | _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) |
| 162 | if e != 0 { |
| 163 | err = e |
| 164 | } |
| 165 | return |
| 166 | } |
| 167 | |
| 168 | func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) { |
| 169 | _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0) |
| 170 | if e != 0 { |
| 171 | err = e |
| 172 | } |
| 173 | return |
| 174 | } |
| 175 | |
| 176 | func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { |
| 177 | _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) |
| 178 | if e != 0 { |
| 179 | err = e |
| 180 | } |
| 181 | return |
| 182 | } |
| 183 | |
| 184 | func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { |
| 185 | _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) |
| 186 | if e != 0 { |
| 187 | err = e |
| 188 | } |
| 189 | return |
| 190 | } |
| 191 | |
| 192 | func socket(domain int, typ int, proto int) (fd int, err error) { |
| 193 | fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) |
| 194 | if e != 0 { |
| 195 | err = e |
| 196 | } |
| 197 | return |
| 198 | } |
| 199 | |
| 200 | func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { |
| 201 | _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) |
| 202 | if e != 0 { |
| 203 | err = e |
| 204 | } |
| 205 | return |
| 206 | } |
| 207 | |
| 208 | func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { |
| 209 | _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0) |
| 210 | if e != 0 { |
| 211 | err = e |
| 212 | } |
| 213 | return |
| 214 | } |
| 215 | |
| 216 | func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { |
| 217 | var base uintptr |
| 218 | if len(p) > 0 { |
| 219 | base = uintptr(unsafe.Pointer(&p[0])) |
| 220 | } |
| 221 | n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))) |
| 222 | if e != 0 { |
| 223 | err = e |
| 224 | } |
| 225 | return |
| 226 | } |
| 227 | |
| 228 | func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { |
| 229 | var base uintptr |
| 230 | if len(p) > 0 { |
| 231 | base = uintptr(unsafe.Pointer(&p[0])) |
| 232 | } |
| 233 | _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)) |
| 234 | if e != 0 { |
| 235 | err = e |
| 236 | } |
| 237 | return |
| 238 | } |
| 239 | |
| 240 | func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { |
| 241 | n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) |
| 242 | if e != 0 { |
| 243 | err = e |
| 244 | } |
| 245 | return |
| 246 | } |
| 247 | |
| 248 | func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { |
| 249 | n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) |
| 250 | if e != 0 { |
| 251 | err = e |
| 252 | } |
| 253 | return |
| 254 | } |
| 255 | |
| 256 | func Listen(s int, n int) (err error) { |
| 257 | _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0) |
| 258 | if e != 0 { |
| 259 | err = e |
| 260 | } |
| 261 | return |
| 262 | } |
| 263 | |
| 264 | func Shutdown(s, how int) (err error) { |
| 265 | _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0) |
| 266 | if e != 0 { |
| 267 | err = e |
| 268 | } |
| 269 | return |
| 270 | } |
| 271 | |
| 272 | func Fstatfs(fd int, buf *Statfs_t) (err error) { |
| 273 | _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) |
| 274 | if e != 0 { |
| 275 | err = e |
| 276 | } |
| 277 | return |
| 278 | } |
| 279 | |
| 280 | func Statfs(path string, buf *Statfs_t) (err error) { |
| 281 | pathp, err := BytePtrFromString(path) |
| 282 | if err != nil { |
| 283 | return err |
| 284 | } |
| 285 | _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) |
| 286 | if e != 0 { |
| 287 | err = e |
| 288 | } |
| 289 | return |
| 290 | } |
| 291 | |
| 292 | func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) } |
| 293 | |
| 294 | func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) } |
| 295 | |
| 296 | func (iov *Iovec) SetLen(length int) { |
| 297 | iov.Len = uint32(length) |
| 298 | } |
| 299 | |
| 300 | func (msghdr *Msghdr) SetControllen(length int) { |
| 301 | msghdr.Controllen = uint32(length) |
| 302 | } |
| 303 | |
| 304 | func (msghdr *Msghdr) SetIovlen(length int) { |
| 305 | msghdr.Iovlen = uint32(length) |
| 306 | } |
| 307 | |
| 308 | func (cmsg *Cmsghdr) SetLen(length int) { |
| 309 | cmsg.Len = uint32(length) |
| 310 | } |
| 311 | |
| 312 | func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { |
| 313 | rsa.Service_name_len = uint32(length) |
| 314 | } |