blob: 11930fc8facf4cc0493997020b83ed6bf9733aa2 [file] [log] [blame]
Don Newton98fd8812019-09-23 15:15:02 -04001// 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
Don Newton7577f072020-01-06 12:41:11 -050022//sysnb pipe(p *[2]_C_int) (err error)
23
Don Newton98fd8812019-09-23 15:15:02 -040024func Pipe(p []int) (err error) {
25 if len(p) != 2 {
26 return EINVAL
27 }
28 var pp [2]_C_int
Don Newton7577f072020-01-06 12:41:11 -050029 // Try pipe2 first for Android O, then try pipe for kernel 2.6.23.
Don Newton98fd8812019-09-23 15:15:02 -040030 err = pipe2(&pp, 0)
Don Newton7577f072020-01-06 12:41:11 -050031 if err == ENOSYS {
32 err = pipe(&pp)
33 }
Don Newton98fd8812019-09-23 15:15:02 -040034 p[0] = int(pp[0])
35 p[1] = int(pp[1])
36 return
37}
38
39//sysnb pipe2(p *[2]_C_int, flags int) (err error)
40
41func Pipe2(p []int, flags int) (err error) {
42 if len(p) != 2 {
43 return EINVAL
44 }
45 var pp [2]_C_int
46 err = pipe2(&pp, flags)
47 p[0] = int(pp[0])
48 p[1] = int(pp[1])
49 return
50}
51
52// Underlying system call writes to newoffset via pointer.
53// Implemented in assembly to avoid allocation.
54func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)
55
56func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
57 newoffset, errno := seek(fd, offset, whence)
58 if errno != 0 {
59 return 0, errno
60 }
61 return newoffset, nil
62}
63
64//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
65//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
66//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
67//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
68//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
69//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
70//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
71//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
72//sysnb socket(domain int, typ int, proto int) (fd int, err error)
73//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
74//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
75//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
76//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
77//sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
78//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
79//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
80
81// 64-bit file system and 32-bit uid calls
82// (16-bit uid calls are not always supported in newer kernels)
83//sys Dup2(oldfd int, newfd int) (err error)
84//sysnb EpollCreate(size int) (fd int, err error)
85//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
86//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
87//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
88//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
89//sysnb Getegid() (egid int) = SYS_GETEGID32
90//sysnb Geteuid() (euid int) = SYS_GETEUID32
91//sysnb Getgid() (gid int) = SYS_GETGID32
92//sysnb Getuid() (uid int) = SYS_GETUID32
93//sysnb InotifyInit() (fd int, err error)
94//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
95//sys Listen(s int, n int) (err error)
96//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
97//sys Pause() (err error)
98//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
99//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
100//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
101//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
102//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
103//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
104//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
105//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
106//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
107//sys Shutdown(fd int, how int) (err error)
108//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
109//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
110//sys Ustat(dev int, ubuf *Ustat_t) (err error)
111
112//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
113//sysnb Gettimeofday(tv *Timeval) (err error)
114
115func Time(t *Time_t) (Time_t, error) {
116 var tv Timeval
117 err := Gettimeofday(&tv)
118 if err != nil {
119 return 0, err
120 }
121 if t != nil {
122 *t = Time_t(tv.Sec)
123 }
124 return Time_t(tv.Sec), nil
125}
126
127func Utime(path string, buf *Utimbuf) error {
128 tv := []Timeval{
129 {Sec: buf.Actime},
130 {Sec: buf.Modtime},
131 }
132 return Utimes(path, tv)
133}
134
135//sys utimes(path string, times *[2]Timeval) (err error)
136
137//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
138//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
139//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
140//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
141
142func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
143 _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
144 if e1 != 0 {
145 err = errnoErr(e1)
146 }
147 return
148}
149
150//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
151
152func Fstatfs(fd int, buf *Statfs_t) (err error) {
153 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
154 if e != 0 {
155 err = e
156 }
157 return
158}
159
160func Statfs(path string, buf *Statfs_t) (err error) {
161 pathp, err := BytePtrFromString(path)
162 if err != nil {
163 return err
164 }
165 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
166 if e != 0 {
167 err = e
168 }
169 return
170}
171
172func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
173 page := uintptr(offset / 4096)
174 if offset != int64(page)*4096 {
175 return 0, EINVAL
176 }
177 return mmap2(addr, length, prot, flags, fd, page)
178}
179
180type rlimit32 struct {
181 Cur uint32
182 Max uint32
183}
184
185//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
186
187const rlimInf32 = ^uint32(0)
188const rlimInf64 = ^uint64(0)
189
190func Getrlimit(resource int, rlim *Rlimit) (err error) {
191 err = prlimit(0, resource, nil, rlim)
192 if err != ENOSYS {
193 return err
194 }
195
196 rl := rlimit32{}
197 err = getrlimit(resource, &rl)
198 if err != nil {
199 return
200 }
201
202 if rl.Cur == rlimInf32 {
203 rlim.Cur = rlimInf64
204 } else {
205 rlim.Cur = uint64(rl.Cur)
206 }
207
208 if rl.Max == rlimInf32 {
209 rlim.Max = rlimInf64
210 } else {
211 rlim.Max = uint64(rl.Max)
212 }
213 return
214}
215
216//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
217
218func Setrlimit(resource int, rlim *Rlimit) (err error) {
219 err = prlimit(0, resource, rlim, nil)
220 if err != ENOSYS {
221 return err
222 }
223
224 rl := rlimit32{}
225 if rlim.Cur == rlimInf64 {
226 rl.Cur = rlimInf32
227 } else if rlim.Cur < uint64(rlimInf32) {
228 rl.Cur = uint32(rlim.Cur)
229 } else {
230 return EINVAL
231 }
232 if rlim.Max == rlimInf64 {
233 rl.Max = rlimInf32
234 } else if rlim.Max < uint64(rlimInf32) {
235 rl.Max = uint32(rlim.Max)
236 } else {
237 return EINVAL
238 }
239
240 return setrlimit(resource, &rl)
241}
242
243func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
244
245func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
246
247func (iov *Iovec) SetLen(length int) {
248 iov.Len = uint32(length)
249}
250
251func (msghdr *Msghdr) SetControllen(length int) {
252 msghdr.Controllen = uint32(length)
253}
254
Don Newton7577f072020-01-06 12:41:11 -0500255func (msghdr *Msghdr) SetIovlen(length int) {
256 msghdr.Iovlen = uint32(length)
257}
258
Don Newton98fd8812019-09-23 15:15:02 -0400259func (cmsg *Cmsghdr) SetLen(length int) {
260 cmsg.Len = uint32(length)
261}
262
263//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
264
265func Poll(fds []PollFd, timeout int) (n int, err error) {
266 if len(fds) == 0 {
267 return poll(nil, 0, timeout)
268 }
269 return poll(&fds[0], len(fds), timeout)
270}
271
272//sys armSyncFileRange(fd int, flags int, off int64, n int64) (err error) = SYS_ARM_SYNC_FILE_RANGE
273
274func SyncFileRange(fd int, off int64, n int64, flags int) error {
275 // The sync_file_range and arm_sync_file_range syscalls differ only in the
276 // order of their arguments.
277 return armSyncFileRange(fd, flags, off, n)
278}
Don Newton7577f072020-01-06 12:41:11 -0500279
280//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
281
282func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
283 cmdlineLen := len(cmdline)
284 if cmdlineLen > 0 {
285 // Account for the additional NULL byte added by
286 // BytePtrFromString in kexecFileLoad. The kexec_file_load
287 // syscall expects a NULL-terminated string.
288 cmdlineLen++
289 }
290 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
291}