github.com/dorkamotorka/go/src@v0.0.0-20230614113921-187095f0e316/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 const ( 10 _SYS_setgroups = SYS_SETGROUPS32 11 _SYS_clone3 = 435 12 _SYS_faccessat2 = 439 13 ) 14 15 func setTimespec(sec, nsec int64) Timespec { 16 return Timespec{Sec: int32(sec), Nsec: int32(nsec)} 17 } 18 19 func setTimeval(sec, usec int64) Timeval { 20 return Timeval{Sec: int32(sec), Usec: int32(usec)} 21 } 22 23 // Underlying system call writes to newoffset via pointer. 24 // Implemented in assembly to avoid allocation. 25 func seek(fd int, offset int64, whence int) (newoffset int64, err Errno) 26 27 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 28 newoffset, errno := seek(fd, offset, whence) 29 if errno != 0 { 30 return 0, errno 31 } 32 return newoffset, nil 33 } 34 35 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 36 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 37 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 38 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 39 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 40 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 41 //sysnb socket(domain int, typ int, proto int) (fd int, err error) 42 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 43 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 44 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 45 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 46 //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) 47 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 48 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 49 50 // 64-bit file system and 32-bit uid calls 51 // (16-bit uid calls are not always supported in newer kernels) 52 //sys Dup2(oldfd int, newfd int) (err error) 53 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 54 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 55 //sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 56 //sysnb Getegid() (egid int) = SYS_GETEGID32 57 //sysnb Geteuid() (euid int) = SYS_GETEUID32 58 //sysnb Getgid() (gid int) = SYS_GETGID32 59 //sysnb Getuid() (uid int) = SYS_GETUID32 60 //sysnb InotifyInit() (fd int, err error) 61 //sys Listen(s int, n int) (err error) 62 //sys Pause() (err error) 63 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 64 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 65 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 66 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 67 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 68 //sys Shutdown(fd int, how int) (err error) 69 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 70 //sys Ustat(dev int, ubuf *Ustat_t) (err error) 71 72 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 73 //sysnb Gettimeofday(tv *Timeval) (err error) 74 //sysnb Time(t *Time_t) (tt Time_t, err error) 75 //sys Utime(path string, buf *Utimbuf) (err error) 76 //sys utimes(path string, times *[2]Timeval) (err error) 77 78 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 79 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 80 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 81 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 82 83 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 84 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 85 86 func Stat(path string, stat *Stat_t) (err error) { 87 return fstatat(_AT_FDCWD, path, stat, 0) 88 } 89 90 func Lchown(path string, uid int, gid int) (err error) { 91 return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW) 92 } 93 94 func Lstat(path string, stat *Stat_t) (err error) { 95 return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW) 96 } 97 98 func Fstatfs(fd int, buf *Statfs_t) (err error) { 99 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 100 if e != 0 { 101 err = e 102 } 103 return 104 } 105 106 func Statfs(path string, buf *Statfs_t) (err error) { 107 pathp, err := BytePtrFromString(path) 108 if err != nil { 109 return err 110 } 111 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 112 if e != 0 { 113 err = e 114 } 115 return 116 } 117 118 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 119 page := uintptr(offset / 4096) 120 if offset != int64(page)*4096 { 121 return 0, EINVAL 122 } 123 return mmap2(addr, length, prot, flags, fd, page) 124 } 125 126 type rlimit32 struct { 127 Cur uint32 128 Max uint32 129 } 130 131 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT 132 133 const rlimInf32 = ^uint32(0) 134 const rlimInf64 = ^uint64(0) 135 136 func Getrlimit(resource int, rlim *Rlimit) (err error) { 137 err = prlimit(0, resource, nil, rlim) 138 if err != ENOSYS { 139 return err 140 } 141 142 rl := rlimit32{} 143 err = getrlimit(resource, &rl) 144 if err != nil { 145 return 146 } 147 148 if rl.Cur == rlimInf32 { 149 rlim.Cur = rlimInf64 150 } else { 151 rlim.Cur = uint64(rl.Cur) 152 } 153 154 if rl.Max == rlimInf32 { 155 rlim.Max = rlimInf64 156 } else { 157 rlim.Max = uint64(rl.Max) 158 } 159 return 160 } 161 162 //sysnb setrlimit1(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 163 164 func setrlimit(resource int, rlim *Rlimit) (err error) { 165 err = prlimit(0, resource, rlim, nil) 166 if err != ENOSYS { 167 return err 168 } 169 170 rl := rlimit32{} 171 if rlim.Cur == rlimInf64 { 172 rl.Cur = rlimInf32 173 } else if rlim.Cur < uint64(rlimInf32) { 174 rl.Cur = uint32(rlim.Cur) 175 } else { 176 return EINVAL 177 } 178 if rlim.Max == rlimInf64 { 179 rl.Max = rlimInf32 180 } else if rlim.Max < uint64(rlimInf32) { 181 rl.Max = uint32(rlim.Max) 182 } else { 183 return EINVAL 184 } 185 186 return setrlimit1(resource, &rl) 187 } 188 189 //go:nosplit 190 func rawSetrlimit(resource int, rlim *Rlimit) Errno { 191 _, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0) 192 if errno != ENOSYS { 193 return errno 194 } 195 196 rl := rlimit32{} 197 if rlim.Cur == rlimInf64 { 198 rl.Cur = rlimInf32 199 } else if rlim.Cur < uint64(rlimInf32) { 200 rl.Cur = uint32(rlim.Cur) 201 } else { 202 return EINVAL 203 } 204 if rlim.Max == rlimInf64 { 205 rl.Max = rlimInf32 206 } else if rlim.Max < uint64(rlimInf32) { 207 rl.Max = uint32(rlim.Max) 208 } else { 209 return EINVAL 210 } 211 212 _, _, errno = RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0) 213 return errno 214 } 215 216 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 217 218 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 219 220 func (iov *Iovec) SetLen(length int) { 221 iov.Len = uint32(length) 222 } 223 224 func (msghdr *Msghdr) SetControllen(length int) { 225 msghdr.Controllen = uint32(length) 226 } 227 228 func (cmsg *Cmsghdr) SetLen(length int) { 229 cmsg.Len = uint32(length) 230 }