github.com/jgarto/itcv@v0.0.0-20180826224514-4eea09c1aa0d/_vendor/src/golang.org/x/sys/unix/syscall_linux_arm.go (about) 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 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 112 //sys Pause() (err error) 113 114 func 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 } 125 126 func 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 138 139 func 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) 148 149 func 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 } 156 157 func 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 } 168 169 func 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 } 176 177 type rlimit32 struct { 178 Cur uint32 179 Max uint32 180 } 181 182 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT 183 184 const rlimInf32 = ^uint32(0) 185 const rlimInf64 = ^uint64(0) 186 187 func 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 214 215 func 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 } 239 240 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 241 242 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 243 244 func (iov *Iovec) SetLen(length int) { 245 iov.Len = uint32(length) 246 } 247 248 func (msghdr *Msghdr) SetControllen(length int) { 249 msghdr.Controllen = uint32(length) 250 } 251 252 func (cmsg *Cmsghdr) SetLen(length int) { 253 cmsg.Len = uint32(length) 254 } 255 256 //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) 257 258 func Poll(fds []PollFd, timeout int) (n int, err error) { 259 if len(fds) == 0 { 260 return poll(nil, 0, timeout) 261 } 262 return poll(&fds[0], len(fds), timeout) 263 }