github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/syscall/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 package syscall 6 7 import "unsafe" 8 9 // archHonorsR2 captures the fact that r2 is honored by the 10 // runtime.GOARCH. Syscall conventions are generally r1, r2, err := 11 // syscall(trap, ...). Not all architectures define r2 in their 12 // ABI. See "man syscall". 13 const archHonorsR2 = true 14 15 const _SYS_setgroups = SYS_SETGROUPS 16 17 func EpollCreate(size int) (fd int, err error) { 18 if size <= 0 { 19 return -1, EINVAL 20 } 21 return EpollCreate1(0) 22 } 23 24 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT 25 //sys Fchown(fd int, uid int, gid int) (err error) 26 //sys Fstat(fd int, stat *Stat_t) (err error) 27 //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) 28 //sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) 29 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 30 //sys Ftruncate(fd int, length int64) (err error) 31 //sysnb Getegid() (egid int) 32 //sysnb Geteuid() (euid int) 33 //sysnb Getgid() (gid int) 34 //sysnb getrlimit(resource int, rlim *Rlimit) (err error) 35 //sysnb Getuid() (uid int) 36 //sys Listen(s int, n int) (err error) 37 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 38 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 39 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 40 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 41 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 42 //sys Setfsgid(gid int) (err error) 43 //sys Setfsuid(uid int) (err error) 44 //sysnb setrlimit(resource int, rlim *Rlimit) (err error) 45 //sysnb Setreuid(ruid int, euid int) (err error) 46 //sys Shutdown(fd int, how int) (err error) 47 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 48 49 func Stat(path string, stat *Stat_t) (err error) { 50 return Fstatat(_AT_FDCWD, path, stat, 0) 51 } 52 53 func Lchown(path string, uid int, gid int) (err error) { 54 return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW) 55 } 56 57 func Lstat(path string, stat *Stat_t) (err error) { 58 return Fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW) 59 } 60 61 //sys Statfs(path string, buf *Statfs_t) (err error) 62 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) = SYS_SYNC_FILE_RANGE2 63 //sys Truncate(path string, length int64) (err error) 64 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 65 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 66 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 67 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 68 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 69 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 70 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 71 //sysnb socket(domain int, typ int, proto int) (fd int, err error) 72 //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) 73 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 74 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 75 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 76 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 77 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 78 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 79 //sys mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) 80 81 type sigset_t struct { 82 X__val [16]uint64 83 } 84 85 //sys pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6 86 87 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) { 88 var ts *Timespec 89 if timeout != nil { 90 ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000} 91 } 92 return pselect(nfd, r, w, e, ts, nil) 93 } 94 95 //sysnb Gettimeofday(tv *Timeval) (err error) 96 97 func setTimespec(sec, nsec int64) Timespec { 98 return Timespec{Sec: sec, Nsec: nsec} 99 } 100 101 func setTimeval(sec, usec int64) Timeval { 102 return Timeval{Sec: sec, Usec: usec} 103 } 104 105 func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) { 106 if tv == nil { 107 return utimensat(dirfd, path, nil, 0) 108 } 109 110 ts := []Timespec{ 111 NsecToTimespec(TimevalToNsec(tv[0])), 112 NsecToTimespec(TimevalToNsec(tv[1])), 113 } 114 return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 115 } 116 117 func Time(t *Time_t) (Time_t, error) { 118 var tv Timeval 119 err := Gettimeofday(&tv) 120 if err != nil { 121 return 0, err 122 } 123 if t != nil { 124 *t = Time_t(tv.Sec) 125 } 126 return Time_t(tv.Sec), nil 127 } 128 129 func Utime(path string, buf *Utimbuf) error { 130 tv := []Timeval{ 131 {Sec: buf.Actime}, 132 {Sec: buf.Modtime}, 133 } 134 return Utimes(path, tv) 135 } 136 137 func utimes(path string, tv *[2]Timeval) (err error) { 138 if tv == nil { 139 return utimensat(_AT_FDCWD, path, nil, 0) 140 } 141 142 ts := []Timespec{ 143 NsecToTimespec(TimevalToNsec(tv[0])), 144 NsecToTimespec(TimevalToNsec(tv[1])), 145 } 146 return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 147 } 148 149 func Pipe(p []int) (err error) { 150 if len(p) != 2 { 151 return EINVAL 152 } 153 var pp [2]_C_int 154 err = pipe2(&pp, 0) 155 if err == nil { 156 p[0] = int(pp[0]) 157 p[1] = int(pp[1]) 158 } 159 return 160 } 161 162 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 163 164 func Pipe2(p []int, flags int) (err error) { 165 if len(p) != 2 { 166 return EINVAL 167 } 168 var pp [2]_C_int 169 err = pipe2(&pp, flags) 170 if err == nil { 171 p[0] = int(pp[0]) 172 p[1] = int(pp[1]) 173 } 174 return 175 } 176 177 // Getrlimit prefers the prlimit64 system call. See issue 38604. 178 func Getrlimit(resource int, rlim *Rlimit) error { 179 err := prlimit(0, resource, nil, rlim) 180 if err != ENOSYS { 181 return err 182 } 183 return getrlimit(resource, rlim) 184 } 185 186 // Setrlimit prefers the prlimit64 system call. See issue 38604. 187 func Setrlimit(resource int, rlim *Rlimit) error { 188 err := prlimit(0, resource, rlim, nil) 189 if err != ENOSYS { 190 return err 191 } 192 return setrlimit(resource, rlim) 193 } 194 195 func (r *PtraceRegs) PC() uint64 { return r.Pc } 196 197 func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc } 198 199 func (iov *Iovec) SetLen(length int) { 200 iov.Len = uint64(length) 201 } 202 203 func (msghdr *Msghdr) SetControllen(length int) { 204 msghdr.Controllen = uint64(length) 205 } 206 207 func (cmsg *Cmsghdr) SetLen(length int) { 208 cmsg.Len = uint64(length) 209 } 210 211 func InotifyInit() (fd int, err error) { 212 return InotifyInit1(0) 213 } 214 215 //sys ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error) 216 217 func Pause() error { 218 _, err := ppoll(nil, 0, nil, nil) 219 return err 220 } 221 222 func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)