github.com/riscv/riscv-go@v0.0.0-20200123204226-124ebd6fcc8e/src/syscall/syscall_nacl.go (about) 1 // Copyright 2013 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 ( 8 "sync" 9 "unsafe" 10 ) 11 12 //sys naclClose(fd int) (err error) = sys_close 13 //sys Exit(code int) (err error) 14 //sys naclFstat(fd int, stat *Stat_t) (err error) = sys_fstat 15 //sys naclRead(fd int, b []byte) (n int, err error) = sys_read 16 //sys naclSeek(fd int, off *int64, whence int) (err error) = sys_lseek 17 //sys naclGetRandomBytes(b []byte) (err error) = sys_get_random_bytes 18 19 const direntSize = 8 + 8 + 2 + 256 20 21 // native_client/src/trusted/service_runtime/include/sys/dirent.h 22 type Dirent struct { 23 Ino int64 24 Off int64 25 Reclen uint16 26 Name [256]byte 27 } 28 29 func direntIno(buf []byte) (uint64, bool) { 30 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 31 } 32 33 func direntReclen(buf []byte) (uint64, bool) { 34 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 35 } 36 37 func direntNamlen(buf []byte) (uint64, bool) { 38 reclen, ok := direntReclen(buf) 39 if !ok { 40 return 0, false 41 } 42 return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true 43 } 44 45 const PathMax = 256 46 47 // An Errno is an unsigned number describing an error condition. 48 // It implements the error interface. The zero Errno is by convention 49 // a non-error, so code to convert from Errno to error should use: 50 // err = nil 51 // if errno != 0 { 52 // err = errno 53 // } 54 type Errno uintptr 55 56 func (e Errno) Error() string { 57 if 0 <= int(e) && int(e) < len(errorstr) { 58 s := errorstr[e] 59 if s != "" { 60 return s 61 } 62 } 63 return "errno " + itoa(int(e)) 64 } 65 66 func (e Errno) Temporary() bool { 67 return e == EINTR || e == EMFILE || e.Timeout() 68 } 69 70 func (e Errno) Timeout() bool { 71 return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT 72 } 73 74 // A Signal is a number describing a process signal. 75 // It implements the os.Signal interface. 76 type Signal int 77 78 const ( 79 _ Signal = iota 80 SIGCHLD 81 SIGINT 82 SIGKILL 83 SIGTRAP 84 SIGQUIT 85 ) 86 87 func (s Signal) Signal() {} 88 89 func (s Signal) String() string { 90 if 0 <= s && int(s) < len(signals) { 91 str := signals[s] 92 if str != "" { 93 return str 94 } 95 } 96 return "signal " + itoa(int(s)) 97 } 98 99 var signals = [...]string{} 100 101 // File system 102 103 const ( 104 Stdin = 0 105 Stdout = 1 106 Stderr = 2 107 ) 108 109 // native_client/src/trusted/service_runtime/include/sys/fcntl.h 110 const ( 111 O_RDONLY = 0 112 O_WRONLY = 1 113 O_RDWR = 2 114 O_ACCMODE = 3 115 116 O_CREAT = 0100 117 O_CREATE = O_CREAT // for ken 118 O_TRUNC = 01000 119 O_APPEND = 02000 120 O_EXCL = 0200 121 O_NONBLOCK = 04000 122 O_NDELAY = O_NONBLOCK 123 O_SYNC = 010000 124 O_FSYNC = O_SYNC 125 O_ASYNC = 020000 126 127 O_CLOEXEC = 0 128 129 FD_CLOEXEC = 1 130 ) 131 132 // native_client/src/trusted/service_runtime/include/sys/fcntl.h 133 const ( 134 F_DUPFD = 0 135 F_GETFD = 1 136 F_SETFD = 2 137 F_GETFL = 3 138 F_SETFL = 4 139 F_GETOWN = 5 140 F_SETOWN = 6 141 F_GETLK = 7 142 F_SETLK = 8 143 F_SETLKW = 9 144 F_RGETLK = 10 145 F_RSETLK = 11 146 F_CNVT = 12 147 F_RSETLKW = 13 148 149 F_RDLCK = 1 150 F_WRLCK = 2 151 F_UNLCK = 3 152 F_UNLKSYS = 4 153 ) 154 155 // native_client/src/trusted/service_runtime/include/bits/stat.h 156 const ( 157 S_IFMT = 0000370000 158 S_IFSHM_SYSV = 0000300000 159 S_IFSEMA = 0000270000 160 S_IFCOND = 0000260000 161 S_IFMUTEX = 0000250000 162 S_IFSHM = 0000240000 163 S_IFBOUNDSOCK = 0000230000 164 S_IFSOCKADDR = 0000220000 165 S_IFDSOCK = 0000210000 166 167 S_IFSOCK = 0000140000 168 S_IFLNK = 0000120000 169 S_IFREG = 0000100000 170 S_IFBLK = 0000060000 171 S_IFDIR = 0000040000 172 S_IFCHR = 0000020000 173 S_IFIFO = 0000010000 174 175 S_UNSUP = 0000370000 176 177 S_ISUID = 0004000 178 S_ISGID = 0002000 179 S_ISVTX = 0001000 180 181 S_IREAD = 0400 182 S_IWRITE = 0200 183 S_IEXEC = 0100 184 185 S_IRWXU = 0700 186 S_IRUSR = 0400 187 S_IWUSR = 0200 188 S_IXUSR = 0100 189 190 S_IRWXG = 070 191 S_IRGRP = 040 192 S_IWGRP = 020 193 S_IXGRP = 010 194 195 S_IRWXO = 07 196 S_IROTH = 04 197 S_IWOTH = 02 198 S_IXOTH = 01 199 ) 200 201 // native_client/src/trusted/service_runtime/include/sys/stat.h 202 // native_client/src/trusted/service_runtime/include/machine/_types.h 203 type Stat_t struct { 204 Dev int64 205 Ino uint64 206 Mode uint32 207 Nlink uint32 208 Uid uint32 209 Gid uint32 210 Rdev int64 211 Size int64 212 Blksize int32 213 Blocks int32 214 Atime int64 215 AtimeNsec int64 216 Mtime int64 217 MtimeNsec int64 218 Ctime int64 219 CtimeNsec int64 220 } 221 222 // Processes 223 // Not supported on NaCl - just enough for package os. 224 225 var ForkLock sync.RWMutex 226 227 type WaitStatus uint32 228 229 func (w WaitStatus) Exited() bool { return false } 230 func (w WaitStatus) ExitStatus() int { return 0 } 231 func (w WaitStatus) Signaled() bool { return false } 232 func (w WaitStatus) Signal() Signal { return 0 } 233 func (w WaitStatus) CoreDump() bool { return false } 234 func (w WaitStatus) Stopped() bool { return false } 235 func (w WaitStatus) Continued() bool { return false } 236 func (w WaitStatus) StopSignal() Signal { return 0 } 237 func (w WaitStatus) TrapCause() int { return 0 } 238 239 // XXX made up 240 type Rusage struct { 241 Utime Timeval 242 Stime Timeval 243 } 244 245 // XXX made up 246 type ProcAttr struct { 247 Dir string 248 Env []string 249 Files []uintptr 250 Sys *SysProcAttr 251 } 252 253 type SysProcAttr struct { 254 } 255 256 // System 257 258 func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 259 func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) { return 0, 0, ENOSYS } 260 func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) { return 0, 0, ENOSYS } 261 func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) { 262 return 0, 0, ENOSYS 263 } 264 265 func Sysctl(key string) (string, error) { 266 if key == "kern.hostname" { 267 return "naclbox", nil 268 } 269 return "", ENOSYS 270 } 271 272 // Unimplemented Unix midden heap. 273 274 const ImplementsGetwd = false 275 276 func Getwd() (wd string, err error) { return "", ENOSYS } 277 func Getegid() int { return 1 } 278 func Geteuid() int { return 1 } 279 func Getgid() int { return 1 } 280 func Getgroups() ([]int, error) { return []int{1}, nil } 281 func Getppid() int { return 2 } 282 func Getpid() int { return 3 } 283 func Gettimeofday(tv *Timeval) error { return ENOSYS } 284 func Getuid() int { return 1 } 285 func Kill(pid int, signum Signal) error { return ENOSYS } 286 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 287 return 0, ENOSYS 288 } 289 func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle uintptr, err error) { 290 return 0, 0, ENOSYS 291 } 292 func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { 293 return 0, ENOSYS 294 } 295 func RouteRIB(facility, param int) ([]byte, error) { return nil, ENOSYS } 296 func ParseRoutingMessage(b []byte) ([]RoutingMessage, error) { return nil, ENOSYS } 297 func ParseRoutingSockaddr(msg RoutingMessage) ([]Sockaddr, error) { return nil, ENOSYS } 298 func SysctlUint32(name string) (value uint32, err error) { return 0, ENOSYS } 299 300 type Iovec struct{} // dummy