github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/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 //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 }