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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 | // +build s390x,linux | |
6 | ||
7 | package unix | |
8 | ||
9 | import ( | |
10 | "unsafe" | |
11 | ) | |
12 | ||
13 | //sys Dup2(oldfd int, newfd int) (err error) | |
14 | //sysnb EpollCreate(size int) (fd int, err error) | |
15 | //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) | |
16 | //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 | |
17 | //sys Fchown(fd int, uid int, gid int) (err error) | |
18 | //sys Fstat(fd int, stat *Stat_t) (err error) | |
19 | //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT | |
20 | //sys Fstatfs(fd int, buf *Statfs_t) (err error) | |
21 | //sys Ftruncate(fd int, length int64) (err error) | |
22 | //sysnb Getegid() (egid int) | |
23 | //sysnb Geteuid() (euid int) | |
24 | //sysnb Getgid() (gid int) | |
25 | //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) | |
26 | //sysnb Getuid() (uid int) | |
27 | //sysnb InotifyInit() (fd int, err error) | |
28 | //sys Lchown(path string, uid int, gid int) (err error) | |
29 | //sys Lstat(path string, stat *Stat_t) (err error) | |
30 | //sys Pause() (err error) | |
31 | //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 | |
32 | //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 | |
107c1cdb | 33 | //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
15c0b25d AP |
34 | //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK |
35 | //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) | |
36 | //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) | |
37 | //sys Setfsgid(gid int) (err error) | |
38 | //sys Setfsuid(uid int) (err error) | |
39 | //sysnb Setregid(rgid int, egid int) (err error) | |
40 | //sysnb Setresgid(rgid int, egid int, sgid int) (err error) | |
41 | //sysnb Setresuid(ruid int, euid int, suid int) (err error) | |
42 | //sysnb Setrlimit(resource int, rlim *Rlimit) (err error) | |
43 | //sysnb Setreuid(ruid int, euid int) (err error) | |
44 | //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) | |
45 | //sys Stat(path string, stat *Stat_t) (err error) | |
46 | //sys Statfs(path string, buf *Statfs_t) (err error) | |
47 | //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) | |
48 | //sys Truncate(path string, length int64) (err error) | |
49 | //sys Ustat(dev int, ubuf *Ustat_t) (err error) | |
50 | //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) | |
51 | //sysnb setgroups(n int, list *_Gid_t) (err error) | |
52 | ||
53 | //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) | |
54 | //sysnb Gettimeofday(tv *Timeval) (err error) | |
55 | ||
56 | func Time(t *Time_t) (tt Time_t, err error) { | |
57 | var tv Timeval | |
58 | err = Gettimeofday(&tv) | |
59 | if err != nil { | |
60 | return 0, err | |
61 | } | |
62 | if t != nil { | |
63 | *t = Time_t(tv.Sec) | |
64 | } | |
65 | return Time_t(tv.Sec), nil | |
66 | } | |
67 | ||
68 | //sys Utime(path string, buf *Utimbuf) (err error) | |
69 | //sys utimes(path string, times *[2]Timeval) (err error) | |
70 | ||
71 | func setTimespec(sec, nsec int64) Timespec { | |
72 | return Timespec{Sec: sec, Nsec: nsec} | |
73 | } | |
74 | ||
75 | func setTimeval(sec, usec int64) Timeval { | |
76 | return Timeval{Sec: sec, Usec: usec} | |
77 | } | |
78 | ||
79 | //sysnb pipe2(p *[2]_C_int, flags int) (err error) | |
80 | ||
81 | func Pipe(p []int) (err error) { | |
82 | if len(p) != 2 { | |
83 | return EINVAL | |
84 | } | |
85 | var pp [2]_C_int | |
86 | err = pipe2(&pp, 0) // pipe2 is the same as pipe when flags are set to 0. | |
87 | p[0] = int(pp[0]) | |
88 | p[1] = int(pp[1]) | |
89 | return | |
90 | } | |
91 | ||
92 | func Pipe2(p []int, flags int) (err error) { | |
93 | if len(p) != 2 { | |
94 | return EINVAL | |
95 | } | |
96 | var pp [2]_C_int | |
97 | err = pipe2(&pp, flags) | |
98 | p[0] = int(pp[0]) | |
99 | p[1] = int(pp[1]) | |
100 | return | |
101 | } | |
102 | ||
103 | func Ioperm(from int, num int, on int) (err error) { | |
104 | return ENOSYS | |
105 | } | |
106 | ||
107 | func Iopl(level int) (err error) { | |
108 | return ENOSYS | |
109 | } | |
110 | ||
111 | func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } | |
112 | ||
113 | func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } | |
114 | ||
115 | func (iov *Iovec) SetLen(length int) { | |
116 | iov.Len = uint64(length) | |
117 | } | |
118 | ||
119 | func (msghdr *Msghdr) SetControllen(length int) { | |
120 | msghdr.Controllen = uint64(length) | |
121 | } | |
122 | ||
123 | func (cmsg *Cmsghdr) SetLen(length int) { | |
124 | cmsg.Len = uint64(length) | |
125 | } | |
126 | ||
127 | // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. | |
128 | // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. | |
129 | func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { | |
130 | mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} | |
131 | r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) | |
132 | xaddr = uintptr(r0) | |
133 | if e1 != 0 { | |
134 | err = errnoErr(e1) | |
135 | } | |
136 | return | |
137 | } | |
138 | ||
139 | // On s390x Linux, all the socket calls go through an extra indirection. | |
140 | // The arguments to the underlying system call (SYS_SOCKETCALL) are the | |
141 | // number below and a pointer to an array of uintptr. | |
142 | const ( | |
143 | // see linux/net.h | |
144 | netSocket = 1 | |
145 | netBind = 2 | |
146 | netConnect = 3 | |
147 | netListen = 4 | |
148 | netAccept = 5 | |
149 | netGetSockName = 6 | |
150 | netGetPeerName = 7 | |
151 | netSocketPair = 8 | |
152 | netSend = 9 | |
153 | netRecv = 10 | |
154 | netSendTo = 11 | |
155 | netRecvFrom = 12 | |
156 | netShutdown = 13 | |
157 | netSetSockOpt = 14 | |
158 | netGetSockOpt = 15 | |
159 | netSendMsg = 16 | |
160 | netRecvMsg = 17 | |
161 | netAccept4 = 18 | |
162 | netRecvMMsg = 19 | |
163 | netSendMMsg = 20 | |
164 | ) | |
165 | ||
166 | func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (int, error) { | |
167 | args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} | |
168 | fd, _, err := Syscall(SYS_SOCKETCALL, netAccept, uintptr(unsafe.Pointer(&args)), 0) | |
169 | if err != 0 { | |
170 | return 0, err | |
171 | } | |
172 | return int(fd), nil | |
173 | } | |
174 | ||
175 | func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) { | |
176 | args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)} | |
177 | fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0) | |
178 | if err != 0 { | |
179 | return 0, err | |
180 | } | |
181 | return int(fd), nil | |
182 | } | |
183 | ||
184 | func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { | |
185 | args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} | |
186 | _, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0) | |
187 | if err != 0 { | |
188 | return err | |
189 | } | |
190 | return nil | |
191 | } | |
192 | ||
193 | func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { | |
194 | args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} | |
195 | _, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0) | |
196 | if err != 0 { | |
197 | return err | |
198 | } | |
199 | return nil | |
200 | } | |
201 | ||
202 | func socketpair(domain int, typ int, flags int, fd *[2]int32) error { | |
203 | args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))} | |
204 | _, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0) | |
205 | if err != 0 { | |
206 | return err | |
207 | } | |
208 | return nil | |
209 | } | |
210 | ||
211 | func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error { | |
212 | args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} | |
213 | _, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0) | |
214 | if err != 0 { | |
215 | return err | |
216 | } | |
217 | return nil | |
218 | } | |
219 | ||
220 | func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error { | |
221 | args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} | |
222 | _, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0) | |
223 | if err != 0 { | |
224 | return err | |
225 | } | |
226 | return nil | |
227 | } | |
228 | ||
229 | func socket(domain int, typ int, proto int) (int, error) { | |
230 | args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)} | |
231 | fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0) | |
232 | if err != 0 { | |
233 | return 0, err | |
234 | } | |
235 | return int(fd), nil | |
236 | } | |
237 | ||
238 | func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error { | |
239 | args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))} | |
240 | _, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0) | |
241 | if err != 0 { | |
242 | return err | |
243 | } | |
244 | return nil | |
245 | } | |
246 | ||
247 | func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error { | |
248 | args := [4]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val)} | |
249 | _, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0) | |
250 | if err != 0 { | |
251 | return err | |
252 | } | |
253 | return nil | |
254 | } | |
255 | ||
256 | func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) { | |
257 | var base uintptr | |
258 | if len(p) > 0 { | |
259 | base = uintptr(unsafe.Pointer(&p[0])) | |
260 | } | |
261 | args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))} | |
262 | n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0) | |
263 | if err != 0 { | |
264 | return 0, err | |
265 | } | |
266 | return int(n), nil | |
267 | } | |
268 | ||
269 | func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error { | |
270 | var base uintptr | |
271 | if len(p) > 0 { | |
272 | base = uintptr(unsafe.Pointer(&p[0])) | |
273 | } | |
274 | args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)} | |
275 | _, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0) | |
276 | if err != 0 { | |
277 | return err | |
278 | } | |
279 | return nil | |
280 | } | |
281 | ||
282 | func recvmsg(s int, msg *Msghdr, flags int) (int, error) { | |
283 | args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} | |
284 | n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0) | |
285 | if err != 0 { | |
286 | return 0, err | |
287 | } | |
288 | return int(n), nil | |
289 | } | |
290 | ||
291 | func sendmsg(s int, msg *Msghdr, flags int) (int, error) { | |
292 | args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} | |
293 | n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0) | |
294 | if err != 0 { | |
295 | return 0, err | |
296 | } | |
297 | return int(n), nil | |
298 | } | |
299 | ||
300 | func Listen(s int, n int) error { | |
301 | args := [2]uintptr{uintptr(s), uintptr(n)} | |
302 | _, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0) | |
303 | if err != 0 { | |
304 | return err | |
305 | } | |
306 | return nil | |
307 | } | |
308 | ||
309 | func Shutdown(s, how int) error { | |
310 | args := [2]uintptr{uintptr(s), uintptr(how)} | |
311 | _, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0) | |
312 | if err != 0 { | |
313 | return err | |
314 | } | |
315 | return nil | |
316 | } | |
317 | ||
318 | //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) | |
319 | ||
320 | func Poll(fds []PollFd, timeout int) (n int, err error) { | |
321 | if len(fds) == 0 { | |
322 | return poll(nil, 0, timeout) | |
323 | } | |
324 | return poll(&fds[0], len(fds), timeout) | |
325 | } | |
326 | ||
327 | //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) | |
328 | ||
329 | func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { | |
330 | cmdlineLen := len(cmdline) | |
331 | if cmdlineLen > 0 { | |
332 | // Account for the additional NULL byte added by | |
333 | // BytePtrFromString in kexecFileLoad. The kexec_file_load | |
334 | // syscall expects a NULL-terminated string. | |
335 | cmdlineLen++ | |
336 | } | |
337 | return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) | |
338 | } |