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// +build 386,linux
7
8package unix
9
10import (
11 "unsafe"
12)
13
14func setTimespec(sec, nsec int64) Timespec {
15 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
16}
17
18func setTimeval(sec, usec int64) Timeval {
19 return Timeval{Sec: int32(sec), Usec: int32(usec)}
20}
21
22// 64-bit file system and 32-bit uid calls
23// (386 default is 32-bit file system and 16-bit uid).
24//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
25//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64
26//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
27//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
28//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
29//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
30//sysnb Getegid() (egid int) = SYS_GETEGID32
31//sysnb Geteuid() (euid int) = SYS_GETEUID32
32//sysnb Getgid() (gid int) = SYS_GETGID32
33//sysnb Getuid() (uid int) = SYS_GETUID32
34//sys Ioperm(from int, num int, on int) (err error)
35//sys Iopl(level int) (err error)
36//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
37//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
38//sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
39//sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
40//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
41//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
42//sys setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32
43//sys setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32
44//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
45//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
46//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
47//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
48//sys Ustat(dev int, ubuf *Ustat_t) (err error)
49//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
50//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
51//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
52
53//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
54//sys Pause() (err error)
55
56func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
57 page := uintptr(offset / 4096)
58 if offset != int64(page)*4096 {
59 return 0, EINVAL
60 }
61 return mmap2(addr, length, prot, flags, fd, page)
62}
63
64type rlimit32 struct {
65 Cur uint32
66 Max uint32
67}
68
69//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
70
71const rlimInf32 = ^uint32(0)
72const rlimInf64 = ^uint64(0)
73
74func Getrlimit(resource int, rlim *Rlimit) (err error) {
75 err = Prlimit(0, resource, nil, rlim)
76 if err != ENOSYS {
77 return err
78 }
79
80 rl := rlimit32{}
81 err = getrlimit(resource, &rl)
82 if err != nil {
83 return
84 }
85
86 if rl.Cur == rlimInf32 {
87 rlim.Cur = rlimInf64
88 } else {
89 rlim.Cur = uint64(rl.Cur)
90 }
91
92 if rl.Max == rlimInf32 {
93 rlim.Max = rlimInf64
94 } else {
95 rlim.Max = uint64(rl.Max)
96 }
97 return
98}
99
100func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
101 newoffset, errno := seek(fd, offset, whence)
102 if errno != 0 {
103 return 0, errno
104 }
105 return newoffset, nil
106}
107
108//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
109//sysnb Gettimeofday(tv *Timeval) (err error)
110//sysnb Time(t *Time_t) (tt Time_t, err error)
111//sys Utime(path string, buf *Utimbuf) (err error)
112//sys utimes(path string, times *[2]Timeval) (err error)
113
114// On x86 Linux, all the socket calls go through an extra indirection,
115// I think because the 5-register system call interface can't handle
116// the 6-argument calls like sendto and recvfrom. Instead the
117// arguments to the underlying system call are the number below
118// and a pointer to an array of uintptr. We hide the pointer in the
119// socketcall assembly to avoid allocation on every system call.
120
121const (
122 // see linux/net.h
123 _SOCKET = 1
124 _BIND = 2
125 _CONNECT = 3
126 _LISTEN = 4
127 _ACCEPT = 5
128 _GETSOCKNAME = 6
129 _GETPEERNAME = 7
130 _SOCKETPAIR = 8
131 _SEND = 9
132 _RECV = 10
133 _SENDTO = 11
134 _RECVFROM = 12
135 _SHUTDOWN = 13
136 _SETSOCKOPT = 14
137 _GETSOCKOPT = 15
138 _SENDMSG = 16
139 _RECVMSG = 17
140 _ACCEPT4 = 18
141 _RECVMMSG = 19
142 _SENDMMSG = 20
143)
144
145func 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
153func 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
161func 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
169func 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
177func 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
185func 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
193func 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
201func 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
209func 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
217func 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
229func 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
241func 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
249func 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
257func 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
265func 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
273func Fstatfs(fd int, buf *Statfs_t) (err error) {
274 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
275 if e != 0 {
276 err = e
277 }
278 return
279}
280
281func Statfs(path string, buf *Statfs_t) (err error) {
282 pathp, err := BytePtrFromString(path)
283 if err != nil {
284 return err
285 }
286 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
287 if e != 0 {
288 err = e
289 }
290 return
291}
292
293func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
294
295func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
296
297func (iov *Iovec) SetLen(length int) {
298 iov.Len = uint32(length)
299}
300
301func (msghdr *Msghdr) SetControllen(length int) {
302 msghdr.Controllen = uint32(length)
303}
304
305func (msghdr *Msghdr) SetIovlen(length int) {
306 msghdr.Iovlen = uint32(length)
307}
308
309func (cmsg *Cmsghdr) SetLen(length int) {
310 cmsg.Len = uint32(length)
311}
312
313func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
314 rsa.Service_name_len = uint32(length)
315}