github.com/dolotech/hongbao@v0.0.0-20191130105438-fd59d7a5dda5/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 TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } 15 16 func NsecToTimespec(nsec int64) (ts Timespec) { 17 ts.Sec = int32(nsec / 1e9) 18 ts.Nsec = int32(nsec % 1e9) 19 return 20 } 21 22 func NsecToTimeval(nsec int64) (tv Timeval) { 23 nsec += 999 // round up to microsecond 24 tv.Sec = int32(nsec / 1e9) 25 tv.Usec = int32(nsec % 1e9 / 1e3) 26 return 27 } 28 29 func Pipe(p []int) (err error) { 30 if len(p) != 2 { 31 return EINVAL 32 } 33 var pp [2]_C_int 34 err = pipe2(&pp, 0) 35 p[0] = int(pp[0]) 36 p[1] = int(pp[1]) 37 return 38 } 39 40 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 41 42 func Pipe2(p []int, flags int) (err error) { 43 if len(p) != 2 { 44 return EINVAL 45 } 46 var pp [2]_C_int 47 err = pipe2(&pp, flags) 48 p[0] = int(pp[0]) 49 p[1] = int(pp[1]) 50 return 51 } 52 53 // Underlying system call writes to newoffset via pointer. 54 // Implemented in assembly to avoid allocation. 55 func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno) 56 57 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 58 newoffset, errno := seek(fd, offset, whence) 59 if errno != 0 { 60 return 0, errno 61 } 62 return newoffset, nil 63 } 64 65 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 66 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 67 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 68 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 69 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 70 //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 71 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 72 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 73 //sysnb socket(domain int, typ int, protocol int) (fd int, err error) 74 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 75 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 76 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 77 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 78 //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) 79 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 80 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 81 82 // 64-bit file system and 32-bit uid calls 83 // (16-bit uid calls are not always supported in newer kernels) 84 //sys Dup2(oldfd int, newfd int) (err error) 85 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 86 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 87 //sysnb Getegid() (egid int) = SYS_GETEGID32 88 //sysnb Geteuid() (euid int) = SYS_GETEUID32 89 //sysnb Getgid() (gid int) = SYS_GETGID32 90 //sysnb Getuid() (uid int) = SYS_GETUID32 91 //sysnb InotifyInit() (fd int, err error) 92 //sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 93 //sys Listen(s int, n int) (err error) 94 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 95 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 96 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 97 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 98 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 99 //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 100 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 101 //sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 102 //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 103 //sys Shutdown(fd int, how int) (err error) 104 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 105 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 106 107 // Vsyscalls on amd64. 108 //sysnb Gettimeofday(tv *Timeval) (err error) 109 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 110 //sys Pause() (err error) 111 112 func Time(t *Time_t) (Time_t, error) { 113 var tv Timeval 114 err := Gettimeofday(&tv) 115 if err != nil { 116 return 0, err 117 } 118 if t != nil { 119 *t = Time_t(tv.Sec) 120 } 121 return Time_t(tv.Sec), nil 122 } 123 124 func Utime(path string, buf *Utimbuf) error { 125 tv := []Timeval{ 126 {Sec: buf.Actime}, 127 {Sec: buf.Modtime}, 128 } 129 return Utimes(path, tv) 130 } 131 132 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 133 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 134 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 135 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 136 137 func Fadvise(fd int, offset int64, length int64, advice int) (err error) { 138 _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32)) 139 if e1 != 0 { 140 err = errnoErr(e1) 141 } 142 return 143 } 144 145 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 146 147 func Fstatfs(fd int, buf *Statfs_t) (err error) { 148 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 149 if e != 0 { 150 err = e 151 } 152 return 153 } 154 155 func Statfs(path string, buf *Statfs_t) (err error) { 156 pathp, err := BytePtrFromString(path) 157 if err != nil { 158 return err 159 } 160 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 161 if e != 0 { 162 err = e 163 } 164 return 165 } 166 167 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 168 page := uintptr(offset / 4096) 169 if offset != int64(page)*4096 { 170 return 0, EINVAL 171 } 172 return mmap2(addr, length, prot, flags, fd, page) 173 } 174 175 type rlimit32 struct { 176 Cur uint32 177 Max uint32 178 } 179 180 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT 181 182 const rlimInf32 = ^uint32(0) 183 const rlimInf64 = ^uint64(0) 184 185 func Getrlimit(resource int, rlim *Rlimit) (err error) { 186 err = prlimit(0, resource, nil, rlim) 187 if err != ENOSYS { 188 return err 189 } 190 191 rl := rlimit32{} 192 err = getrlimit(resource, &rl) 193 if err != nil { 194 return 195 } 196 197 if rl.Cur == rlimInf32 { 198 rlim.Cur = rlimInf64 199 } else { 200 rlim.Cur = uint64(rl.Cur) 201 } 202 203 if rl.Max == rlimInf32 { 204 rlim.Max = rlimInf64 205 } else { 206 rlim.Max = uint64(rl.Max) 207 } 208 return 209 } 210 211 //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 212 213 func Setrlimit(resource int, rlim *Rlimit) (err error) { 214 err = prlimit(0, resource, rlim, nil) 215 if err != ENOSYS { 216 return err 217 } 218 219 rl := rlimit32{} 220 if rlim.Cur == rlimInf64 { 221 rl.Cur = rlimInf32 222 } else if rlim.Cur < uint64(rlimInf32) { 223 rl.Cur = uint32(rlim.Cur) 224 } else { 225 return EINVAL 226 } 227 if rlim.Max == rlimInf64 { 228 rl.Max = rlimInf32 229 } else if rlim.Max < uint64(rlimInf32) { 230 rl.Max = uint32(rlim.Max) 231 } else { 232 return EINVAL 233 } 234 235 return setrlimit(resource, &rl) 236 } 237 238 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 239 240 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 241 242 func (iov *Iovec) SetLen(length int) { 243 iov.Len = uint32(length) 244 } 245 246 func (msghdr *Msghdr) SetControllen(length int) { 247 msghdr.Controllen = uint32(length) 248 } 249 250 func (cmsg *Cmsghdr) SetLen(length int) { 251 cmsg.Len = uint32(length) 252 } 253 254 //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) 255 256 func Poll(fds []PollFd, timeout int) (n int, err error) { 257 if len(fds) == 0 { 258 return poll(nil, 0, timeout) 259 } 260 return poll(&fds[0], len(fds), timeout) 261 }