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