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//go:build linux && (mips || mipsle)
6
7package syscall
8
9import "unsafe"
10
11const (
12	_SYS_setgroups  = SYS_SETGROUPS
13	_SYS_clone3     = 4435
14	_SYS_faccessat2 = 4439
15	_SYS_fchmodat2  = 4452
16)
17
18func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
19
20//sys	Dup2(oldfd int, newfd int) (err error)
21//sys	Fchown(fd int, uid int, gid int) (err error)
22//sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
23//sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
24//sysnb	Getegid() (egid int)
25//sysnb	Geteuid() (euid int)
26//sysnb	Getgid() (gid int)
27//sysnb	Getuid() (uid int)
28//sys	Lchown(path string, uid int, gid int) (err error)
29//sys	Listen(s int, n int) (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
33//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
34//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
35//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
36//sys	Setfsgid(gid int) (err error)
37//sys	Setfsuid(uid int) (err error)
38//sys	Shutdown(fd int, how int) (err error)
39//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
40
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	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
45//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
46//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
47//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
48//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
49//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
50//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
51//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
52//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
53//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
54//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
55//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
56//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
57//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
58
59//sysnb	InotifyInit() (fd int, err error)
60//sys	Ioperm(from int, num int, on int) (err error)
61//sys	Iopl(level int) (err error)
62
63//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
64//sysnb	Gettimeofday(tv *Timeval) (err error)
65//sysnb	Time(t *Time_t) (tt Time_t, err error)
66//sys	Utime(path string, buf *Utimbuf) (err error)
67//sys	utimes(path string, times *[2]Timeval) (err error)
68
69//sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
70//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
71//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
72//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
73
74func Fstatfs(fd int, buf *Statfs_t) (err error) {
75	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
76	if e != 0 {
77		err = errnoErr(e)
78	}
79	return
80}
81
82func Statfs(path string, buf *Statfs_t) (err error) {
83	p, err := BytePtrFromString(path)
84	if err != nil {
85		return err
86	}
87	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(p)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
88	if e != 0 {
89		err = errnoErr(e)
90	}
91	return
92}
93
94func Seek(fd int, offset int64, whence int) (off int64, err error) {
95	_, _, e := Syscall6(SYS__LLSEEK, uintptr(fd), uintptr(offset>>32), uintptr(offset), uintptr(unsafe.Pointer(&off)), uintptr(whence), 0)
96	if e != 0 {
97		err = errnoErr(e)
98	}
99	return
100}
101
102func setTimespec(sec, nsec int64) Timespec {
103	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
104}
105
106func setTimeval(sec, usec int64) Timeval {
107	return Timeval{Sec: int32(sec), Usec: int32(usec)}
108}
109
110//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
111
112func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
113	page := uintptr(offset / 4096)
114	if offset != int64(page)*4096 {
115		return 0, EINVAL
116	}
117	return mmap2(addr, length, prot, flags, fd, page)
118}
119
120const rlimInf32 = ^uint32(0)
121const rlimInf64 = ^uint64(0)
122
123type rlimit32 struct {
124	Cur uint32
125	Max uint32
126}
127
128//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
129
130func Getrlimit(resource int, rlim *Rlimit) (err error) {
131	err = prlimit(0, resource, nil, rlim)
132	if err != ENOSYS {
133		return err
134	}
135
136	rl := rlimit32{}
137	err = getrlimit(resource, &rl)
138	if err != nil {
139		return
140	}
141
142	if rl.Cur == rlimInf32 {
143		rlim.Cur = rlimInf64
144	} else {
145		rlim.Cur = uint64(rl.Cur)
146	}
147
148	if rl.Max == rlimInf32 {
149		rlim.Max = rlimInf64
150	} else {
151		rlim.Max = uint64(rl.Max)
152	}
153	return
154}
155
156//sysnb setrlimit1(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
157
158func setrlimit(resource int, rlim *Rlimit) (err error) {
159	err = prlimit(0, resource, rlim, nil)
160	if err != ENOSYS {
161		return err
162	}
163
164	rl := rlimit32{}
165	if rlim.Cur == rlimInf64 {
166		rl.Cur = rlimInf32
167	} else if rlim.Cur < uint64(rlimInf32) {
168		rl.Cur = uint32(rlim.Cur)
169	} else {
170		return EINVAL
171	}
172	if rlim.Max == rlimInf64 {
173		rl.Max = rlimInf32
174	} else if rlim.Max < uint64(rlimInf32) {
175		rl.Max = uint32(rlim.Max)
176	} else {
177		return EINVAL
178	}
179
180	return setrlimit1(resource, &rl)
181}
182
183//go:nosplit
184func rawSetrlimit(resource int, rlim *Rlimit) Errno {
185	_, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
186	if errno != ENOSYS {
187		return errno
188	}
189
190	rl := rlimit32{}
191	if rlim.Cur == rlimInf64 {
192		rl.Cur = rlimInf32
193	} else if rlim.Cur < uint64(rlimInf32) {
194		rl.Cur = uint32(rlim.Cur)
195	} else {
196		return EINVAL
197	}
198	if rlim.Max == rlimInf64 {
199		rl.Max = rlimInf32
200	} else if rlim.Max < uint64(rlimInf32) {
201		rl.Max = uint32(rlim.Max)
202	} else {
203		return EINVAL
204	}
205
206	_, _, errno = RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
207	return errno
208}
209
210func (r *PtraceRegs) PC() uint64 { return uint64(r.Regs[64]) }
211
212func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = uint32(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