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 Getpagesize() int { return 4096 } 15 16func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } 17 18func NsecToTimespec(nsec int64) (ts Timespec) { 19 ts.Sec = int32(nsec / 1e9) 20 ts.Nsec = int32(nsec % 1e9) 21 return 22} 23 24func 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 31func 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 44func 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. 57func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno) 58 59func 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//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 112//sys Pause() (err error) 113 114func Time(t *Time_t) (Time_t, error) { 115 var tv Timeval 116 err := Gettimeofday(&tv) 117 if err != nil { 118 return 0, err 119 } 120 if t != nil { 121 *t = Time_t(tv.Sec) 122 } 123 return Time_t(tv.Sec), nil 124} 125 126func Utime(path string, buf *Utimbuf) error { 127 tv := []Timeval{ 128 {Sec: buf.Actime}, 129 {Sec: buf.Modtime}, 130 } 131 return Utimes(path, tv) 132} 133 134//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 135//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 136//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 137//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 138 139func Fadvise(fd int, offset int64, length int64, advice int) (err error) { 140 _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32)) 141 if e1 != 0 { 142 err = errnoErr(e1) 143 } 144 return 145} 146 147//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 148 149func Fstatfs(fd int, buf *Statfs_t) (err error) { 150 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 151 if e != 0 { 152 err = e 153 } 154 return 155} 156 157func Statfs(path string, buf *Statfs_t) (err error) { 158 pathp, err := BytePtrFromString(path) 159 if err != nil { 160 return err 161 } 162 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 163 if e != 0 { 164 err = e 165 } 166 return 167} 168 169func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 170 page := uintptr(offset / 4096) 171 if offset != int64(page)*4096 { 172 return 0, EINVAL 173 } 174 return mmap2(addr, length, prot, flags, fd, page) 175} 176 177type rlimit32 struct { 178 Cur uint32 179 Max uint32 180} 181 182//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT 183 184const rlimInf32 = ^uint32(0) 185const rlimInf64 = ^uint64(0) 186 187func Getrlimit(resource int, rlim *Rlimit) (err error) { 188 err = prlimit(0, resource, nil, rlim) 189 if err != ENOSYS { 190 return err 191 } 192 193 rl := rlimit32{} 194 err = getrlimit(resource, &rl) 195 if err != nil { 196 return 197 } 198 199 if rl.Cur == rlimInf32 { 200 rlim.Cur = rlimInf64 201 } else { 202 rlim.Cur = uint64(rl.Cur) 203 } 204 205 if rl.Max == rlimInf32 { 206 rlim.Max = rlimInf64 207 } else { 208 rlim.Max = uint64(rl.Max) 209 } 210 return 211} 212 213//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 214 215func Setrlimit(resource int, rlim *Rlimit) (err error) { 216 err = prlimit(0, resource, rlim, nil) 217 if err != ENOSYS { 218 return err 219 } 220 221 rl := rlimit32{} 222 if rlim.Cur == rlimInf64 { 223 rl.Cur = rlimInf32 224 } else if rlim.Cur < uint64(rlimInf32) { 225 rl.Cur = uint32(rlim.Cur) 226 } else { 227 return EINVAL 228 } 229 if rlim.Max == rlimInf64 { 230 rl.Max = rlimInf32 231 } else if rlim.Max < uint64(rlimInf32) { 232 rl.Max = uint32(rlim.Max) 233 } else { 234 return EINVAL 235 } 236 237 return setrlimit(resource, &rl) 238} 239 240func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 241 242func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 243 244func (iov *Iovec) SetLen(length int) { 245 iov.Len = uint32(length) 246} 247 248func (msghdr *Msghdr) SetControllen(length int) { 249 msghdr.Controllen = uint32(length) 250} 251 252func (cmsg *Cmsghdr) SetLen(length int) { 253 cmsg.Len = uint32(length) 254} 255