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9b12e4fe JC |
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 | ||
7 | package unix | |
8 | ||
9 | import ( | |
10 | "syscall" | |
11 | "unsafe" | |
12 | ) | |
13 | ||
14 | func Getpagesize() int { return 4096 } | |
15 | ||
16 | func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } | |
17 | ||
18 | func NsecToTimespec(nsec int64) (ts Timespec) { | |
19 | ts.Sec = int32(nsec / 1e9) | |
20 | ts.Nsec = int32(nsec % 1e9) | |
21 | return | |
22 | } | |
23 | ||
24 | func NsecToTimeval(nsec int64) (tv Timeval) { | |
25 | nsec += 999 // round up to microsecond | |
26 | tv.Sec = int32(nsec / 1e9) | |
27 | tv.Usec = int32(nsec % 1e9 / 1e3) | |
28 | return | |
29 | } | |
30 | ||
31 | func Pipe(p []int) (err error) { | |
32 | if len(p) != 2 { | |
33 | return EINVAL | |
34 | } | |
35 | var pp [2]_C_int | |
36 | err = pipe2(&pp, 0) | |
37 | p[0] = int(pp[0]) | |
38 | p[1] = int(pp[1]) | |
39 | return | |
40 | } | |
41 | ||
42 | //sysnb pipe2(p *[2]_C_int, flags int) (err error) | |
43 | ||
44 | func Pipe2(p []int, flags int) (err error) { | |
45 | if len(p) != 2 { | |
46 | return EINVAL | |
47 | } | |
48 | var pp [2]_C_int | |
49 | err = pipe2(&pp, flags) | |
50 | p[0] = int(pp[0]) | |
51 | p[1] = int(pp[1]) | |
52 | return | |
53 | } | |
54 | ||
55 | // Underlying system call writes to newoffset via pointer. | |
56 | // Implemented in assembly to avoid allocation. | |
57 | func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno) | |
58 | ||
59 | func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { | |
60 | newoffset, errno := seek(fd, offset, whence) | |
61 | if errno != 0 { | |
62 | return 0, errno | |
63 | } | |
64 | return newoffset, nil | |
65 | } | |
66 | ||
67 | //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) | |
68 | //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) | |
69 | //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) | |
70 | //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) | |
71 | //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 | |
72 | //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 | |
73 | //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) | |
74 | //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) | |
75 | //sysnb socket(domain int, typ int, proto int) (fd int, err error) | |
76 | //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) | |
77 | //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) | |
78 | //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) | |
79 | //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) | |
80 | //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) | |
81 | //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) | |
82 | //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) | |
83 | ||
84 | // 64-bit file system and 32-bit uid calls | |
85 | // (16-bit uid calls are not always supported in newer kernels) | |
86 | //sys Dup2(oldfd int, newfd int) (err error) | |
87 | //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 | |
88 | //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 | |
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 sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 | |
98 | //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT | |
99 | //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 | |
100 | //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 | |
101 | //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 | |
102 | //sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 | |
103 | //sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 | |
104 | //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 | |
105 | //sys Shutdown(fd int, how int) (err error) | |
106 | //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) | |
107 | //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 | |
108 | ||
109 | // Vsyscalls on amd64. | |
110 | //sysnb Gettimeofday(tv *Timeval) (err error) | |
111 | //sysnb Time(t *Time_t) (tt Time_t, err error) | |
112 | ||
113 | //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 | |
114 | //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 | |
115 | //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 | |
116 | //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 | |
117 | ||
118 | func Fadvise(fd int, offset int64, length int64, advice int) (err error) { | |
119 | _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32)) | |
120 | if e1 != 0 { | |
121 | err = errnoErr(e1) | |
122 | } | |
123 | return | |
124 | } | |
125 | ||
126 | //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) | |
127 | ||
128 | func Fstatfs(fd int, buf *Statfs_t) (err error) { | |
129 | _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) | |
130 | if e != 0 { | |
131 | err = e | |
132 | } | |
133 | return | |
134 | } | |
135 | ||
136 | func Statfs(path string, buf *Statfs_t) (err error) { | |
137 | pathp, err := BytePtrFromString(path) | |
138 | if err != nil { | |
139 | return err | |
140 | } | |
141 | _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) | |
142 | if e != 0 { | |
143 | err = e | |
144 | } | |
145 | return | |
146 | } | |
147 | ||
148 | func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { | |
149 | page := uintptr(offset / 4096) | |
150 | if offset != int64(page)*4096 { | |
151 | return 0, EINVAL | |
152 | } | |
153 | return mmap2(addr, length, prot, flags, fd, page) | |
154 | } | |
155 | ||
156 | type rlimit32 struct { | |
157 | Cur uint32 | |
158 | Max uint32 | |
159 | } | |
160 | ||
161 | //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT | |
162 | ||
163 | const rlimInf32 = ^uint32(0) | |
164 | const rlimInf64 = ^uint64(0) | |
165 | ||
166 | func Getrlimit(resource int, rlim *Rlimit) (err error) { | |
167 | err = prlimit(0, resource, nil, rlim) | |
168 | if err != ENOSYS { | |
169 | return err | |
170 | } | |
171 | ||
172 | rl := rlimit32{} | |
173 | err = getrlimit(resource, &rl) | |
174 | if err != nil { | |
175 | return | |
176 | } | |
177 | ||
178 | if rl.Cur == rlimInf32 { | |
179 | rlim.Cur = rlimInf64 | |
180 | } else { | |
181 | rlim.Cur = uint64(rl.Cur) | |
182 | } | |
183 | ||
184 | if rl.Max == rlimInf32 { | |
185 | rlim.Max = rlimInf64 | |
186 | } else { | |
187 | rlim.Max = uint64(rl.Max) | |
188 | } | |
189 | return | |
190 | } | |
191 | ||
192 | //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT | |
193 | ||
194 | func Setrlimit(resource int, rlim *Rlimit) (err error) { | |
195 | err = prlimit(0, resource, rlim, nil) | |
196 | if err != ENOSYS { | |
197 | return err | |
198 | } | |
199 | ||
200 | rl := rlimit32{} | |
201 | if rlim.Cur == rlimInf64 { | |
202 | rl.Cur = rlimInf32 | |
203 | } else if rlim.Cur < uint64(rlimInf32) { | |
204 | rl.Cur = uint32(rlim.Cur) | |
205 | } else { | |
206 | return EINVAL | |
207 | } | |
208 | if rlim.Max == rlimInf64 { | |
209 | rl.Max = rlimInf32 | |
210 | } else if rlim.Max < uint64(rlimInf32) { | |
211 | rl.Max = uint32(rlim.Max) | |
212 | } else { | |
213 | return EINVAL | |
214 | } | |
215 | ||
216 | return setrlimit(resource, &rl) | |
217 | } | |
218 | ||
219 | func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } | |
220 | ||
221 | func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } | |
222 | ||
223 | func (iov *Iovec) SetLen(length int) { | |
224 | iov.Len = uint32(length) | |
225 | } | |
226 | ||
227 | func (msghdr *Msghdr) SetControllen(length int) { | |
228 | msghdr.Controllen = uint32(length) | |
229 | } | |
230 | ||
231 | func (cmsg *Cmsghdr) SetLen(length int) { | |
232 | cmsg.Len = uint32(length) | |
233 | } |