Source file src/syscall/syscall_openbsd.go
1 // Copyright 2009,2010,2020 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 // OpenBSD system calls. 6 // This file is compiled as ordinary Go code, 7 // but it is also input to mksyscall, 8 // which parses the //sys lines and generates system call stubs. 9 // Note that sometimes we use a lowercase //sys name and wrap 10 // it in our own nicer implementation, either here or in 11 // syscall_bsd.go or syscall_unix.go. 12 13 package syscall 14 15 import ( 16 "internal/abi" 17 "unsafe" 18 ) 19 20 var dupTrampoline = abi.FuncPCABI0(libc_dup3_trampoline) 21 22 func init() { 23 execveLibc = execve 24 } 25 26 func syscallInternal(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) { 27 // OpenBSD 7.5+ no longer supports indirect syscalls. A number of Go 28 // packages make use of syscall.Syscall with SYS_IOCTL since it is 29 // not well supported by golang.org/x/sys/unix. Reroute this system 30 // call number to the respective libc stub so that it continues to 31 // work for the time being. See #63900 for further details. 32 if trap == SYS_IOCTL { 33 return syscallX(abi.FuncPCABI0(libc_ioctl_trampoline), a1, a2, a3) 34 } 35 return 0, 0, ENOSYS 36 } 37 38 func syscall6Internal(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) { 39 // OpenBSD 7.5+ no longer supports indirect syscalls. A number of Go 40 // packages make use of syscall.Syscall with SYS___SYSCTL since it is 41 // not well supported by golang.org/x/sys/unix. Reroute this system 42 // call number to the respective libc stub so that it continues to 43 // work for the time being. See #63900 for further details. 44 if trap == SYS___SYSCTL { 45 return syscall6X(abi.FuncPCABI0(libc_sysctl_trampoline), a1, a2, a3, a4, a5, a6) 46 } 47 return 0, 0, ENOSYS 48 } 49 50 func rawSyscallInternal(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) { 51 return 0, 0, ENOSYS 52 } 53 54 func rawSyscall6Internal(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) { 55 return 0, 0, ENOSYS 56 } 57 58 func syscall9Internal(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) { 59 return 0, 0, ENOSYS 60 } 61 62 // Implemented in the runtime package (runtime/sys_openbsd.go) 63 func syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 64 func syscallX(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 65 func syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 66 func syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 67 func syscall10(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2 uintptr, err Errno) 68 func syscall10X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2 uintptr, err Errno) 69 func rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 70 func rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 71 func rawSyscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 72 func rawSyscall10X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2 uintptr, err Errno) 73 74 func syscall9(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) { 75 return syscall10(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, 0) 76 } 77 func syscall9X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) { 78 return syscall10X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, 0) 79 } 80 81 func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 82 func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 83 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) 84 func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 85 func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) 86 87 type SockaddrDatalink struct { 88 Len uint8 89 Family uint8 90 Index uint16 91 Type uint8 92 Nlen uint8 93 Alen uint8 94 Slen uint8 95 Data [24]int8 96 raw RawSockaddrDatalink 97 } 98 99 func nametomib(name string) (mib []_C_int, err error) { 100 // Perform lookup via a binary search 101 left := 0 102 right := len(sysctlMib) - 1 103 for { 104 idx := int(uint(left+right) >> 1) 105 switch { 106 case name == sysctlMib[idx].ctlname: 107 return sysctlMib[idx].ctloid, nil 108 case name > sysctlMib[idx].ctlname: 109 left = idx + 1 110 default: 111 right = idx - 1 112 } 113 if left > right { 114 break 115 } 116 } 117 return nil, EINVAL 118 } 119 120 func direntIno(buf []byte) (uint64, bool) { 121 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) 122 } 123 124 func direntReclen(buf []byte) (uint64, bool) { 125 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 126 } 127 128 func direntNamlen(buf []byte) (uint64, bool) { 129 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 130 } 131 132 func Pipe(p []int) error { 133 return Pipe2(p, 0) 134 } 135 136 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 137 138 func Pipe2(p []int, flags int) error { 139 if len(p) != 2 { 140 return EINVAL 141 } 142 var pp [2]_C_int 143 err := pipe2(&pp, flags) 144 if err == nil { 145 p[0] = int(pp[0]) 146 p[1] = int(pp[1]) 147 } 148 return err 149 } 150 151 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 152 153 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 154 var rsa RawSockaddrAny 155 var len _Socklen = SizeofSockaddrAny 156 nfd, err = accept4(fd, &rsa, &len, flags) 157 if err != nil { 158 return 159 } 160 if len > SizeofSockaddrAny { 161 panic("RawSockaddrAny too small") 162 } 163 sa, err = anyToSockaddr(&rsa) 164 if err != nil { 165 Close(nfd) 166 nfd = 0 167 } 168 return 169 } 170 171 //sys getdents(fd int, buf []byte) (n int, err error) 172 173 func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { 174 return getdents(fd, buf) 175 } 176 177 // TODO, see golang.org/issue/5847 178 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 179 return -1, ENOSYS 180 } 181 182 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 183 var bufptr *Statfs_t 184 var bufsize uintptr 185 if len(buf) > 0 { 186 bufptr = &buf[0] 187 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 188 } 189 return getfsstat(bufptr, bufsize, flags) 190 } 191 192 /* 193 * Exposed directly 194 */ 195 //sys Access(path string, mode uint32) (err error) 196 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 197 //sys Chdir(path string) (err error) 198 //sys Chflags(path string, flags int) (err error) 199 //sys Chmod(path string, mode uint32) (err error) 200 //sys Chown(path string, uid int, gid int) (err error) 201 //sys Chroot(path string) (err error) 202 //sys Close(fd int) (err error) 203 //sys Dup(fd int) (nfd int, err error) 204 //sys Dup2(from int, to int) (err error) 205 //sys dup3(from int, to int, flags int) (err error) 206 //sys Fchdir(fd int) (err error) 207 //sys Fchflags(fd int, flags int) (err error) 208 //sys Fchmod(fd int, mode uint32) (err error) 209 //sys Fchown(fd int, uid int, gid int) (err error) 210 //sys Flock(fd int, how int) (err error) 211 //sys Fpathconf(fd int, name int) (val int, err error) 212 //sys Fstat(fd int, stat *Stat_t) (err error) 213 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 214 //sys Fsync(fd int) (err error) 215 //sys Ftruncate(fd int, length int64) (err error) 216 //sysnb Getegid() (egid int) 217 //sysnb Geteuid() (uid int) 218 //sysnb Getgid() (gid int) 219 //sysnb Getpgid(pid int) (pgid int, err error) 220 //sysnb Getpgrp() (pgrp int) 221 //sysnb Getpid() (pid int) 222 //sysnb Getppid() (ppid int) 223 //sys Getpriority(which int, who int) (prio int, err error) 224 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 225 //sysnb Getrusage(who int, rusage *Rusage) (err error) 226 //sysnb Getsid(pid int) (sid int, err error) 227 //sysnb Gettimeofday(tv *Timeval) (err error) 228 //sysnb Getuid() (uid int) 229 //sys Issetugid() (tainted bool) 230 //sys Kill(pid int, signum Signal) (err error) 231 //sys Kqueue() (fd int, err error) 232 //sys Lchown(path string, uid int, gid int) (err error) 233 //sys Link(path string, link string) (err error) 234 //sys Listen(s int, backlog int) (err error) 235 //sys Lstat(path string, stat *Stat_t) (err error) 236 //sys Mkdir(path string, mode uint32) (err error) 237 //sys Mkfifo(path string, mode uint32) (err error) 238 //sys Mknod(path string, mode uint32, dev int) (err error) 239 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 240 //sys Open(path string, mode int, perm uint32) (fd int, err error) 241 //sys Pathconf(path string, name int) (val int, err error) 242 //sys pread(fd int, p []byte, offset int64) (n int, err error) 243 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) 244 //sys read(fd int, p []byte) (n int, err error) 245 //sys Readlink(path string, buf []byte) (n int, err error) 246 //sys Rename(from string, to string) (err error) 247 //sys Revoke(path string) (err error) 248 //sys Rmdir(path string) (err error) 249 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 250 //sysnb Setegid(egid int) (err error) 251 //sysnb Seteuid(euid int) (err error) 252 //sysnb Setgid(gid int) (err error) 253 //sys Setlogin(name string) (err error) 254 //sysnb Setpgid(pid int, pgid int) (err error) 255 //sys Setpriority(which int, who int, prio int) (err error) 256 //sysnb Setregid(rgid int, egid int) (err error) 257 //sysnb Setreuid(ruid int, euid int) (err error) 258 //sysnb setrlimit(which int, lim *Rlimit) (err error) 259 //sysnb Setsid() (pid int, err error) 260 //sysnb Settimeofday(tp *Timeval) (err error) 261 //sysnb Setuid(uid int) (err error) 262 //sys Stat(path string, stat *Stat_t) (err error) 263 //sys Statfs(path string, stat *Statfs_t) (err error) 264 //sys Symlink(path string, link string) (err error) 265 //sys Sync() (err error) 266 //sys Truncate(path string, length int64) (err error) 267 //sys Umask(newmask int) (oldmask int) 268 //sys Unlink(path string) (err error) 269 //sys Unmount(path string, flags int) (err error) 270 //sys write(fd int, p []byte) (n int, err error) 271 //sys writev(fd int, iovecs []Iovec) (n uintptr, err error) 272 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 273 //sys munmap(addr uintptr, length uintptr) (err error) 274 //sys getfsstat(stat *Statfs_t, bufsize uintptr, flags int) (n int, err error) 275 //sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) 276 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_read 277 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_lseek 278 //sys getcwd(buf []byte) (n int, err error) 279 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) 280 //sysnb fork() (pid int, err error) 281 //sysnb execve(path *byte, argv **byte, envp **byte) (err error) 282 //sysnb exit(res int) (err error) 283 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 284 //sys fstatat(fd int, path string, stat *Stat_t, flags int) (err error) 285 //sys unlinkat(fd int, path string, flags int) (err error) 286 //sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error) 287