github.com/nibnait/go-learn@v0.0.0-20220227013611-dfa47ea6d2da/src/pkg/mod/golang.org/x/sys@v0.0.0-20210630005230-0f9fa26af87c/unix/syscall_linux_arm64.go (about) 1 // Copyright 2015 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 //go:build arm64 && linux 6 // +build arm64,linux 7 8 package unix 9 10 import "unsafe" 11 12 func EpollCreate(size int) (fd int, err error) { 13 if size <= 0 { 14 return -1, EINVAL 15 } 16 return EpollCreate1(0) 17 } 18 19 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT 20 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 21 //sys Fchown(fd int, uid int, gid int) (err error) 22 //sys Fstat(fd int, stat *Stat_t) (err error) 23 //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) 24 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 25 //sys Ftruncate(fd int, length int64) (err error) 26 //sysnb Getegid() (egid int) 27 //sysnb Geteuid() (euid int) 28 //sysnb Getgid() (gid int) 29 //sysnb getrlimit(resource int, rlim *Rlimit) (err error) 30 //sysnb Getuid() (uid int) 31 //sys Listen(s int, n int) (err error) 32 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 33 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 34 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 35 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 36 37 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) { 38 var ts *Timespec 39 if timeout != nil { 40 ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000} 41 } 42 return Pselect(nfd, r, w, e, ts, nil) 43 } 44 45 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 46 //sys setfsgid(gid int) (prev int, err error) 47 //sys setfsuid(uid int) (prev int, err error) 48 //sysnb Setregid(rgid int, egid int) (err error) 49 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 50 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 51 //sysnb setrlimit(resource int, rlim *Rlimit) (err error) 52 //sysnb Setreuid(ruid int, euid int) (err error) 53 //sys Shutdown(fd int, how int) (err error) 54 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 55 56 func Stat(path string, stat *Stat_t) (err error) { 57 return Fstatat(AT_FDCWD, path, stat, 0) 58 } 59 60 func Lchown(path string, uid int, gid int) (err error) { 61 return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW) 62 } 63 64 func Lstat(path string, stat *Stat_t) (err error) { 65 return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW) 66 } 67 68 //sys Statfs(path string, buf *Statfs_t) (err error) 69 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) 70 //sys Truncate(path string, length int64) (err error) 71 72 func Ustat(dev int, ubuf *Ustat_t) (err error) { 73 return ENOSYS 74 } 75 76 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 77 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 78 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 79 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 80 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 81 //sysnb setgroups(n int, list *_Gid_t) (err error) 82 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 83 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 84 //sysnb socket(domain int, typ int, proto int) (fd int, err error) 85 //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) 86 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 87 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 88 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 89 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 90 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 91 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 92 //sys mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) 93 94 //sysnb Gettimeofday(tv *Timeval) (err error) 95 96 func setTimespec(sec, nsec int64) Timespec { 97 return Timespec{Sec: sec, Nsec: nsec} 98 } 99 100 func setTimeval(sec, usec int64) Timeval { 101 return Timeval{Sec: sec, Usec: usec} 102 } 103 104 func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) { 105 if tv == nil { 106 return utimensat(dirfd, path, nil, 0) 107 } 108 109 ts := []Timespec{ 110 NsecToTimespec(TimevalToNsec(tv[0])), 111 NsecToTimespec(TimevalToNsec(tv[1])), 112 } 113 return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 114 } 115 116 func Time(t *Time_t) (Time_t, error) { 117 var tv Timeval 118 err := Gettimeofday(&tv) 119 if err != nil { 120 return 0, err 121 } 122 if t != nil { 123 *t = Time_t(tv.Sec) 124 } 125 return Time_t(tv.Sec), nil 126 } 127 128 func Utime(path string, buf *Utimbuf) error { 129 tv := []Timeval{ 130 {Sec: buf.Actime}, 131 {Sec: buf.Modtime}, 132 } 133 return Utimes(path, tv) 134 } 135 136 func utimes(path string, tv *[2]Timeval) (err error) { 137 if tv == nil { 138 return utimensat(AT_FDCWD, path, nil, 0) 139 } 140 141 ts := []Timespec{ 142 NsecToTimespec(TimevalToNsec(tv[0])), 143 NsecToTimespec(TimevalToNsec(tv[1])), 144 } 145 return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 146 } 147 148 func Pipe(p []int) (err error) { 149 if len(p) != 2 { 150 return EINVAL 151 } 152 var pp [2]_C_int 153 err = pipe2(&pp, 0) 154 p[0] = int(pp[0]) 155 p[1] = int(pp[1]) 156 return 157 } 158 159 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 160 161 func Pipe2(p []int, flags int) (err error) { 162 if len(p) != 2 { 163 return EINVAL 164 } 165 var pp [2]_C_int 166 err = pipe2(&pp, flags) 167 p[0] = int(pp[0]) 168 p[1] = int(pp[1]) 169 return 170 } 171 172 // Getrlimit prefers the prlimit64 system call. See issue 38604. 173 func Getrlimit(resource int, rlim *Rlimit) error { 174 err := prlimit(0, resource, nil, rlim) 175 if err != ENOSYS { 176 return err 177 } 178 return getrlimit(resource, rlim) 179 } 180 181 // Setrlimit prefers the prlimit64 system call. See issue 38604. 182 func Setrlimit(resource int, rlim *Rlimit) error { 183 err := prlimit(0, resource, rlim, nil) 184 if err != ENOSYS { 185 return err 186 } 187 return setrlimit(resource, rlim) 188 } 189 190 func (r *PtraceRegs) PC() uint64 { return r.Pc } 191 192 func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc } 193 194 func (iov *Iovec) SetLen(length int) { 195 iov.Len = uint64(length) 196 } 197 198 func (msghdr *Msghdr) SetControllen(length int) { 199 msghdr.Controllen = uint64(length) 200 } 201 202 func (msghdr *Msghdr) SetIovlen(length int) { 203 msghdr.Iovlen = uint64(length) 204 } 205 206 func (cmsg *Cmsghdr) SetLen(length int) { 207 cmsg.Len = uint64(length) 208 } 209 210 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 211 rsa.Service_name_len = uint64(length) 212 } 213 214 func InotifyInit() (fd int, err error) { 215 return InotifyInit1(0) 216 } 217 218 // dup2 exists because func Dup3 in syscall_linux.go references 219 // it in an unreachable path. dup2 isn't available on arm64. 220 func dup2(oldfd int, newfd int) error 221 222 func Pause() error { 223 _, err := ppoll(nil, 0, nil, nil) 224 return err 225 } 226 227 func Poll(fds []PollFd, timeout int) (n int, err error) { 228 var ts *Timespec 229 if timeout >= 0 { 230 ts = new(Timespec) 231 *ts = NsecToTimespec(int64(timeout) * 1e6) 232 } 233 if len(fds) == 0 { 234 return ppoll(nil, 0, ts, nil) 235 } 236 return ppoll(&fds[0], len(fds), ts, nil) 237 } 238 239 //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) 240 241 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { 242 cmdlineLen := len(cmdline) 243 if cmdlineLen > 0 { 244 // Account for the additional NULL byte added by 245 // BytePtrFromString in kexecFileLoad. The kexec_file_load 246 // syscall expects a NULL-terminated string. 247 cmdlineLen++ 248 } 249 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) 250 }