github.com/hbdrawn/golang@v0.0.0-20141214014649-6b835209aba2/src/syscall/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 package syscall 6 7 import "unsafe" 8 9 func Getpagesize() int { return 4096 } 10 11 func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } 12 13 func NsecToTimespec(nsec int64) (ts Timespec) { 14 ts.Sec = int32(nsec / 1e9) 15 ts.Nsec = int32(nsec % 1e9) 16 return 17 } 18 19 func NsecToTimeval(nsec int64) (tv Timeval) { 20 nsec += 999 // round up to microsecond 21 tv.Sec = int32(nsec / 1e9) 22 tv.Usec = int32(nsec % 1e9 / 1e3) 23 return 24 } 25 26 // Underlying system call writes to newoffset via pointer. 27 // Implemented in assembly to avoid allocation. 28 func seek(fd int, offset int64, whence int) (newoffset int64, err Errno) 29 30 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 31 newoffset, errno := seek(fd, offset, whence) 32 if errno != 0 { 33 return 0, errno 34 } 35 return newoffset, nil 36 } 37 38 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 39 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 40 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 41 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 42 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 43 //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 44 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 45 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 46 //sysnb socket(domain int, typ int, proto int) (fd int, err error) 47 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 48 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 49 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 50 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 51 //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) 52 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 53 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 54 55 // 64-bit file system and 32-bit uid calls 56 // (16-bit uid calls are not always supported in newer kernels) 57 //sys Chown(path string, uid int, gid int) (err error) = SYS_CHOWN32 58 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 59 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 60 //sysnb Getegid() (egid int) = SYS_GETEGID32 61 //sysnb Geteuid() (euid int) = SYS_GETEUID32 62 //sysnb Getgid() (gid int) = SYS_GETGID32 63 //sysnb Getuid() (uid int) = SYS_GETUID32 64 //sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 65 //sys Listen(s int, n int) (err error) 66 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 67 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 68 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 69 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 70 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 71 //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 72 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 73 //sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 74 //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 75 //sys Shutdown(fd int, how int) (err error) 76 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 77 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 78 79 // Vsyscalls on amd64. 80 //sysnb Gettimeofday(tv *Timeval) (err error) 81 //sysnb Time(t *Time_t) (tt Time_t, err error) 82 83 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 84 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 85 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 86 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 87 88 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 89 90 func Fstatfs(fd int, buf *Statfs_t) (err error) { 91 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 92 if e != 0 { 93 err = e 94 } 95 return 96 } 97 98 func Statfs(path string, buf *Statfs_t) (err error) { 99 pathp, err := BytePtrFromString(path) 100 if err != nil { 101 return err 102 } 103 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 104 use(unsafe.Pointer(pathp)) 105 if e != 0 { 106 err = e 107 } 108 return 109 } 110 111 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 112 page := uintptr(offset / 4096) 113 if offset != int64(page)*4096 { 114 return 0, EINVAL 115 } 116 return mmap2(addr, length, prot, flags, fd, page) 117 } 118 119 type rlimit32 struct { 120 Cur uint32 121 Max uint32 122 } 123 124 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT 125 126 const rlimInf32 = ^uint32(0) 127 const rlimInf64 = ^uint64(0) 128 129 func Getrlimit(resource int, rlim *Rlimit) (err error) { 130 err = prlimit(0, resource, nil, rlim) 131 if err != ENOSYS { 132 return err 133 } 134 135 rl := rlimit32{} 136 err = getrlimit(resource, &rl) 137 if err != nil { 138 return 139 } 140 141 if rl.Cur == rlimInf32 { 142 rlim.Cur = rlimInf64 143 } else { 144 rlim.Cur = uint64(rl.Cur) 145 } 146 147 if rl.Max == rlimInf32 { 148 rlim.Max = rlimInf64 149 } else { 150 rlim.Max = uint64(rl.Max) 151 } 152 return 153 } 154 155 //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 156 157 func Setrlimit(resource int, rlim *Rlimit) (err error) { 158 err = prlimit(0, resource, rlim, nil) 159 if err != ENOSYS { 160 return err 161 } 162 163 rl := rlimit32{} 164 if rlim.Cur == rlimInf64 { 165 rl.Cur = rlimInf32 166 } else if rlim.Cur < uint64(rlimInf32) { 167 rl.Cur = uint32(rlim.Cur) 168 } else { 169 return EINVAL 170 } 171 if rlim.Max == rlimInf64 { 172 rl.Max = rlimInf32 173 } else if rlim.Max < uint64(rlimInf32) { 174 rl.Max = uint32(rlim.Max) 175 } else { 176 return EINVAL 177 } 178 179 return setrlimit(resource, &rl) 180 } 181 182 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 183 184 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 185 186 func (iov *Iovec) SetLen(length int) { 187 iov.Len = uint32(length) 188 } 189 190 func (msghdr *Msghdr) SetControllen(length int) { 191 msghdr.Controllen = uint32(length) 192 } 193 194 func (cmsg *Cmsghdr) SetLen(length int) { 195 cmsg.Len = uint32(length) 196 }