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// +build arm,linux
6
7package unix
8
9import (
10 "syscall"
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
22func Pipe(p []int) (err error) {
23 if len(p) != 2 {
24 return EINVAL
25 }
26 var pp [2]_C_int
27 err = pipe2(&pp, 0)
28 p[0] = int(pp[0])
29 p[1] = int(pp[1])
30 return
31}
32
33//sysnb pipe2(p *[2]_C_int, flags int) (err error)
34
35func Pipe2(p []int, flags int) (err error) {
36 if len(p) != 2 {
37 return EINVAL
38 }
39 var pp [2]_C_int
40 err = pipe2(&pp, flags)
41 p[0] = int(pp[0])
42 p[1] = int(pp[1])
43 return
44}
45
46// Underlying system call writes to newoffset via pointer.
47// Implemented in assembly to avoid allocation.
48func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)
49
50func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
51 newoffset, errno := seek(fd, offset, whence)
52 if errno != 0 {
53 return 0, errno
54 }
55 return newoffset, nil
56}
57
58//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
59//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
60//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
61//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
62//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
63//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
64//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
65//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
66//sysnb socket(domain int, typ int, proto int) (fd int, err error)
67//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
68//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
69//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
70//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
71//sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
72//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
73//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
74
75// 64-bit file system and 32-bit uid calls
76// (16-bit uid calls are not always supported in newer kernels)
77//sys Dup2(oldfd int, newfd int) (err error)
78//sysnb EpollCreate(size int) (fd int, err error)
79//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
80//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
81//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
82//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
83//sysnb Getegid() (egid int) = SYS_GETEGID32
84//sysnb Geteuid() (euid int) = SYS_GETEUID32
85//sysnb Getgid() (gid int) = SYS_GETGID32
86//sysnb Getuid() (uid int) = SYS_GETUID32
87//sysnb InotifyInit() (fd int, err error)
88//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
89//sys Listen(s int, n int) (err error)
90//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
91//sys Pause() (err error)
92//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
93//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
94//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
95//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
96//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
97//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
98//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
99//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
100//sys Shutdown(fd int, how int) (err error)
101//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
102//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
103//sys Ustat(dev int, ubuf *Ustat_t) (err error)
104
105//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
106//sysnb Gettimeofday(tv *Timeval) (err error)
107
108func Time(t *Time_t) (Time_t, error) {
109 var tv Timeval
110 err := Gettimeofday(&tv)
111 if err != nil {
112 return 0, err
113 }
114 if t != nil {
115 *t = Time_t(tv.Sec)
116 }
117 return Time_t(tv.Sec), nil
118}
119
120func Utime(path string, buf *Utimbuf) error {
121 tv := []Timeval{
122 {Sec: buf.Actime},
123 {Sec: buf.Modtime},
124 }
125 return Utimes(path, tv)
126}
127
128//sys utimes(path string, times *[2]Timeval) (err error)
129
130//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
131//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
132//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
133//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
134
135func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
136 _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
137 if e1 != 0 {
138 err = errnoErr(e1)
139 }
140 return
141}
142
143//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
144
145func Fstatfs(fd int, buf *Statfs_t) (err error) {
146 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
147 if e != 0 {
148 err = e
149 }
150 return
151}
152
153func Statfs(path string, buf *Statfs_t) (err error) {
154 pathp, err := BytePtrFromString(path)
155 if err != nil {
156 return err
157 }
158 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
159 if e != 0 {
160 err = e
161 }
162 return
163}
164
165func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
166 page := uintptr(offset / 4096)
167 if offset != int64(page)*4096 {
168 return 0, EINVAL
169 }
170 return mmap2(addr, length, prot, flags, fd, page)
171}
172
173type rlimit32 struct {
174 Cur uint32
175 Max uint32
176}
177
178//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
179
180const rlimInf32 = ^uint32(0)
181const rlimInf64 = ^uint64(0)
182
183func Getrlimit(resource int, rlim *Rlimit) (err error) {
184 err = prlimit(0, resource, nil, rlim)
185 if err != ENOSYS {
186 return err
187 }
188
189 rl := rlimit32{}
190 err = getrlimit(resource, &rl)
191 if err != nil {
192 return
193 }
194
195 if rl.Cur == rlimInf32 {
196 rlim.Cur = rlimInf64
197 } else {
198 rlim.Cur = uint64(rl.Cur)
199 }
200
201 if rl.Max == rlimInf32 {
202 rlim.Max = rlimInf64
203 } else {
204 rlim.Max = uint64(rl.Max)
205 }
206 return
207}
208
209//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
210
211func Setrlimit(resource int, rlim *Rlimit) (err error) {
212 err = prlimit(0, resource, rlim, nil)
213 if err != ENOSYS {
214 return err
215 }
216
217 rl := rlimit32{}
218 if rlim.Cur == rlimInf64 {
219 rl.Cur = rlimInf32
220 } else if rlim.Cur < uint64(rlimInf32) {
221 rl.Cur = uint32(rlim.Cur)
222 } else {
223 return EINVAL
224 }
225 if rlim.Max == rlimInf64 {
226 rl.Max = rlimInf32
227 } else if rlim.Max < uint64(rlimInf32) {
228 rl.Max = uint32(rlim.Max)
229 } else {
230 return EINVAL
231 }
232
233 return setrlimit(resource, &rl)
234}
235
236func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
237
238func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
239
240func (iov *Iovec) SetLen(length int) {
241 iov.Len = uint32(length)
242}
243
244func (msghdr *Msghdr) SetControllen(length int) {
245 msghdr.Controllen = uint32(length)
246}
247
248func (cmsg *Cmsghdr) SetLen(length int) {
249 cmsg.Len = uint32(length)
250}
251
252//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
253
254func Poll(fds []PollFd, timeout int) (n int, err error) {
255 if len(fds) == 0 {
256 return poll(nil, 0, timeout)
257 }
258 return poll(&fds[0], len(fds), timeout)
259}