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 linux
6// +build mips mipsle
7
8package unix
9
10import (
11	"syscall"
12	"unsafe"
13)
14
15func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)
16
17//sys	Dup2(oldfd int, newfd int) (err error)
18//sysnb	EpollCreate(size int) (fd int, err error)
19//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
20//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
21//sys	Fchown(fd int, uid int, gid int) (err error)
22//sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
23//sysnb	Getegid() (egid int)
24//sysnb	Geteuid() (euid int)
25//sysnb	Getgid() (gid int)
26//sysnb	Getuid() (uid int)
27//sys	Lchown(path string, uid int, gid int) (err error)
28//sys	Listen(s int, n int) (err error)
29//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
30//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
31//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
32//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
33//sys	Setfsgid(gid int) (err error)
34//sys	Setfsuid(uid int) (err error)
35//sysnb	Setregid(rgid int, egid int) (err error)
36//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
37//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
38//sysnb	Setreuid(ruid int, euid int) (err error)
39//sys	Shutdown(fd int, how int) (err error)
40//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
41//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
42//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
43//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
44//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
45//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
46//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
47//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
48//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
49//sysnb	setgroups(n int, list *_Gid_t) (err error)
50//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
51//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
52//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
53//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
54//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
55//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
56//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
57//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
58//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
59//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
60
61//sysnb	InotifyInit() (fd int, err error)
62//sys	Ioperm(from int, num int, on int) (err error)
63//sys	Iopl(level int) (err error)
64
65//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
66//sysnb	Gettimeofday(tv *Timeval) (err error)
67//sysnb	Time(t *Time_t) (tt Time_t, err error)
68//sys	Utime(path string, buf *Utimbuf) (err error)
69//sys	utimes(path string, times *[2]Timeval) (err error)
70
71//sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
72//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
73//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
74//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
75
76//sys	Pause() (err error)
77
78func Fstatfs(fd int, buf *Statfs_t) (err error) {
79	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
80	if e != 0 {
81		err = errnoErr(e)
82	}
83	return
84}
85
86func Statfs(path string, buf *Statfs_t) (err error) {
87	p, err := BytePtrFromString(path)
88	if err != nil {
89		return err
90	}
91	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(p)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
92	if e != 0 {
93		err = errnoErr(e)
94	}
95	return
96}
97
98func Seek(fd int, offset int64, whence int) (off int64, err error) {
99	_, _, e := Syscall6(SYS__LLSEEK, uintptr(fd), uintptr(offset>>32), uintptr(offset), uintptr(unsafe.Pointer(&off)), uintptr(whence), 0)
100	if e != 0 {
101		err = errnoErr(e)
102	}
103	return
104}
105
106func setTimespec(sec, nsec int64) Timespec {
107	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
108}
109
110func setTimeval(sec, usec int64) Timeval {
111	return Timeval{Sec: int32(sec), Usec: int32(usec)}
112}
113
114//sysnb pipe2(p *[2]_C_int, flags int) (err error)
115
116func Pipe2(p []int, flags int) (err error) {
117	if len(p) != 2 {
118		return EINVAL
119	}
120	var pp [2]_C_int
121	err = pipe2(&pp, flags)
122	p[0] = int(pp[0])
123	p[1] = int(pp[1])
124	return
125}
126
127//sysnb pipe() (p1 int, p2 int, err error)
128
129func Pipe(p []int) (err error) {
130	if len(p) != 2 {
131		return EINVAL
132	}
133	p[0], p[1], err = pipe()
134	return
135}
136
137//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
138
139func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
140	page := uintptr(offset / 4096)
141	if offset != int64(page)*4096 {
142		return 0, EINVAL
143	}
144	return mmap2(addr, length, prot, flags, fd, page)
145}
146
147const rlimInf32 = ^uint32(0)
148const rlimInf64 = ^uint64(0)
149
150type rlimit32 struct {
151	Cur uint32
152	Max uint32
153}
154
155//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
156
157func Getrlimit(resource int, rlim *Rlimit) (err error) {
158	err = prlimit(0, resource, nil, rlim)
159	if err != ENOSYS {
160		return err
161	}
162
163	rl := rlimit32{}
164	err = getrlimit(resource, &rl)
165	if err != nil {
166		return
167	}
168
169	if rl.Cur == rlimInf32 {
170		rlim.Cur = rlimInf64
171	} else {
172		rlim.Cur = uint64(rl.Cur)
173	}
174
175	if rl.Max == rlimInf32 {
176		rlim.Max = rlimInf64
177	} else {
178		rlim.Max = uint64(rl.Max)
179	}
180	return
181}
182
183//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
184
185func Setrlimit(resource int, rlim *Rlimit) (err error) {
186	err = prlimit(0, resource, rlim, nil)
187	if err != ENOSYS {
188		return err
189	}
190
191	rl := rlimit32{}
192	if rlim.Cur == rlimInf64 {
193		rl.Cur = rlimInf32
194	} else if rlim.Cur < uint64(rlimInf32) {
195		rl.Cur = uint32(rlim.Cur)
196	} else {
197		return EINVAL
198	}
199	if rlim.Max == rlimInf64 {
200		rl.Max = rlimInf32
201	} else if rlim.Max < uint64(rlimInf32) {
202		rl.Max = uint32(rlim.Max)
203	} else {
204		return EINVAL
205	}
206
207	return setrlimit(resource, &rl)
208}
209
210func (r *PtraceRegs) PC() uint64 { return r.Epc }
211
212func (r *PtraceRegs) SetPC(pc uint64) { r.Epc = pc }
213
214func (iov *Iovec) SetLen(length int) {
215	iov.Len = uint32(length)
216}
217
218func (msghdr *Msghdr) SetControllen(length int) {
219	msghdr.Controllen = uint32(length)
220}
221
222func (cmsg *Cmsghdr) SetLen(length int) {
223	cmsg.Len = uint32(length)
224}
225
226//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
227
228func Poll(fds []PollFd, timeout int) (n int, err error) {
229	if len(fds) == 0 {
230		return poll(nil, 0, timeout)
231	}
232	return poll(&fds[0], len(fds), timeout)
233}
234