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//sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
45//sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
46//sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
47//sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
48//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
49//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
50//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
51//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
52//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
53//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
54//sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
55//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
56
57//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
58//sys	Pause() (err error)
59
60func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
61	page := uintptr(offset / 4096)
62	if offset != int64(page)*4096 {
63		return 0, EINVAL
64	}
65	return mmap2(addr, length, prot, flags, fd, page)
66}
67
68type rlimit32 struct {
69	Cur uint32
70	Max uint32
71}
72
73//sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
74
75const rlimInf32 = ^uint32(0)
76const rlimInf64 = ^uint64(0)
77
78func Getrlimit(resource int, rlim *Rlimit) (err error) {
79	err = Prlimit(0, resource, nil, rlim)
80	if err != ENOSYS {
81		return err
82	}
83
84	rl := rlimit32{}
85	err = getrlimit(resource, &rl)
86	if err != nil {
87		return
88	}
89
90	if rl.Cur == rlimInf32 {
91		rlim.Cur = rlimInf64
92	} else {
93		rlim.Cur = uint64(rl.Cur)
94	}
95
96	if rl.Max == rlimInf32 {
97		rlim.Max = rlimInf64
98	} else {
99		rlim.Max = uint64(rl.Max)
100	}
101	return
102}
103
104//sysnb	setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
105
106func Setrlimit(resource int, rlim *Rlimit) (err error) {
107	err = Prlimit(0, resource, rlim, nil)
108	if err != ENOSYS {
109		return err
110	}
111
112	rl := rlimit32{}
113	if rlim.Cur == rlimInf64 {
114		rl.Cur = rlimInf32
115	} else if rlim.Cur < uint64(rlimInf32) {
116		rl.Cur = uint32(rlim.Cur)
117	} else {
118		return EINVAL
119	}
120	if rlim.Max == rlimInf64 {
121		rl.Max = rlimInf32
122	} else if rlim.Max < uint64(rlimInf32) {
123		rl.Max = uint32(rlim.Max)
124	} else {
125		return EINVAL
126	}
127
128	return setrlimit(resource, &rl)
129}
130
131func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
132	newoffset, errno := seek(fd, offset, whence)
133	if errno != 0 {
134		return 0, errno
135	}
136	return newoffset, nil
137}
138
139//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
140//sysnb	Gettimeofday(tv *Timeval) (err error)
141//sysnb	Time(t *Time_t) (tt Time_t, err error)
142//sys	Utime(path string, buf *Utimbuf) (err error)
143//sys	utimes(path string, times *[2]Timeval) (err error)
144
145// On x86 Linux, all the socket calls go through an extra indirection,
146// I think because the 5-register system call interface can't handle
147// the 6-argument calls like sendto and recvfrom. Instead the
148// arguments to the underlying system call are the number below
149// and a pointer to an array of uintptr. We hide the pointer in the
150// socketcall assembly to avoid allocation on every system call.
151
152const (
153	// see linux/net.h
154	_SOCKET      = 1
155	_BIND        = 2
156	_CONNECT     = 3
157	_LISTEN      = 4
158	_ACCEPT      = 5
159	_GETSOCKNAME = 6
160	_GETPEERNAME = 7
161	_SOCKETPAIR  = 8
162	_SEND        = 9
163	_RECV        = 10
164	_SENDTO      = 11
165	_RECVFROM    = 12
166	_SHUTDOWN    = 13
167	_SETSOCKOPT  = 14
168	_GETSOCKOPT  = 15
169	_SENDMSG     = 16
170	_RECVMSG     = 17
171	_ACCEPT4     = 18
172	_RECVMMSG    = 19
173	_SENDMMSG    = 20
174)
175
176func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
177	fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
178	if e != 0 {
179		err = e
180	}
181	return
182}
183
184func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
185	fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
186	if e != 0 {
187		err = e
188	}
189	return
190}
191
192func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
193	_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
194	if e != 0 {
195		err = e
196	}
197	return
198}
199
200func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
201	_, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
202	if e != 0 {
203		err = e
204	}
205	return
206}
207
208func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
209	_, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
210	if e != 0 {
211		err = e
212	}
213	return
214}
215
216func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
217	_, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
218	if e != 0 {
219		err = e
220	}
221	return
222}
223
224func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
225	_, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
226	if e != 0 {
227		err = e
228	}
229	return
230}
231
232func socket(domain int, typ int, proto int) (fd int, err error) {
233	fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
234	if e != 0 {
235		err = e
236	}
237	return
238}
239
240func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
241	_, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
242	if e != 0 {
243		err = e
244	}
245	return
246}
247
248func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
249	_, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
250	if e != 0 {
251		err = e
252	}
253	return
254}
255
256func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
257	var base uintptr
258	if len(p) > 0 {
259		base = uintptr(unsafe.Pointer(&p[0]))
260	}
261	n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
262	if e != 0 {
263		err = e
264	}
265	return
266}
267
268func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
269	var base uintptr
270	if len(p) > 0 {
271		base = uintptr(unsafe.Pointer(&p[0]))
272	}
273	_, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
274	if e != 0 {
275		err = e
276	}
277	return
278}
279
280func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
281	n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
282	if e != 0 {
283		err = e
284	}
285	return
286}
287
288func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
289	n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
290	if e != 0 {
291		err = e
292	}
293	return
294}
295
296func Listen(s int, n int) (err error) {
297	_, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
298	if e != 0 {
299		err = e
300	}
301	return
302}
303
304func Shutdown(s, how int) (err error) {
305	_, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
306	if e != 0 {
307		err = e
308	}
309	return
310}
311
312func Fstatfs(fd int, buf *Statfs_t) (err error) {
313	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
314	if e != 0 {
315		err = e
316	}
317	return
318}
319
320func Statfs(path string, buf *Statfs_t) (err error) {
321	pathp, err := BytePtrFromString(path)
322	if err != nil {
323		return err
324	}
325	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
326	if e != 0 {
327		err = e
328	}
329	return
330}
331
332func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
333
334func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
335
336func (iov *Iovec) SetLen(length int) {
337	iov.Len = uint32(length)
338}
339
340func (msghdr *Msghdr) SetControllen(length int) {
341	msghdr.Controllen = uint32(length)
342}
343
344func (msghdr *Msghdr) SetIovlen(length int) {
345	msghdr.Iovlen = uint32(length)
346}
347
348func (cmsg *Cmsghdr) SetLen(length int) {
349	cmsg.Len = uint32(length)
350}
351
352func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
353	rsa.Service_name_len = uint32(length)
354}
355