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
7package unix
8
9import (
10 "unsafe"
11)
12
13func setTimespec(sec, nsec int64) Timespec {
14 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
15}
16
17func 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
55func 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
63type rlimit32 struct {
64 Cur uint32
65 Max uint32
66}
67
68//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
69
70const rlimInf32 = ^uint32(0)
71const rlimInf64 = ^uint64(0)
72
73func 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
99func 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
120const (
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
144func 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
152func 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
160func 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
168func 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
176func 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
184func 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
192func 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
200func 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
208func 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
216func 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
228func 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
240func 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
248func 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
256func 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
264func 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
272func 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
280func 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
292func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
293
294func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
295
296func (iov *Iovec) SetLen(length int) {
297 iov.Len = uint32(length)
298}
299
300func (msghdr *Msghdr) SetControllen(length int) {
301 msghdr.Controllen = uint32(length)
302}
303
304func (msghdr *Msghdr) SetIovlen(length int) {
305 msghdr.Iovlen = uint32(length)
306}
307
308func (cmsg *Cmsghdr) SetLen(length int) {
309 cmsg.Len = uint32(length)
310}
311
312func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
313 rsa.Service_name_len = uint32(length)
314}