syscall_linux_arm64.go

     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  
     7  package unix
     8  
     9  import "unsafe"
    10  
    11  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
    12  //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
    13  //sys	Fchown(fd int, uid int, gid int) (err error)
    14  //sys	Fstat(fd int, stat *Stat_t) (err error)
    15  //sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
    16  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
    17  //sys	Ftruncate(fd int, length int64) (err error)
    18  //sysnb	Getegid() (egid int)
    19  //sysnb	Geteuid() (euid int)
    20  //sysnb	Getgid() (gid int)
    21  //sysnb	getrlimit(resource int, rlim *Rlimit) (err error)
    22  //sysnb	Getuid() (uid int)
    23  //sys	Listen(s int, n int) (err error)
    24  //sys	MemfdSecret(flags int) (fd int, err error)
    25  //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    26  //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    27  //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    28  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
    29  
    30  func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
    31  	var ts *Timespec
    32  	if timeout != nil {
    33  		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
    34  	}
    35  	return pselect6(nfd, r, w, e, ts, nil)
    36  }
    37  
    38  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
    39  //sys	setfsgid(gid int) (prev int, err error)
    40  //sys	setfsuid(uid int) (prev int, err error)
    41  //sys	Shutdown(fd int, how int) (err error)
    42  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
    43  
    44  func Stat(path string, stat *Stat_t) (err error) {
    45  	return Fstatat(AT_FDCWD, path, stat, 0)
    46  }
    47  
    48  func Lchown(path string, uid int, gid int) (err error) {
    49  	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
    50  }
    51  
    52  func Lstat(path string, stat *Stat_t) (err error) {
    53  	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
    54  }
    55  
    56  //sys	Statfs(path string, buf *Statfs_t) (err error)
    57  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
    58  //sys	Truncate(path string, length int64) (err error)
    59  
    60  func Ustat(dev int, ubuf *Ustat_t) (err error) {
    61  	return ENOSYS
    62  }
    63  
    64  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    65  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    66  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    67  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
    68  //sysnb	setgroups(n int, list *_Gid_t) (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  //sysnb	Gettimeofday(tv *Timeval) (err error)
    82  
    83  func setTimespec(sec, nsec int64) Timespec {
    84  	return Timespec{Sec: sec, Nsec: nsec}
    85  }
    86  
    87  func setTimeval(sec, usec int64) Timeval {
    88  	return Timeval{Sec: sec, Usec: usec}
    89  }
    90  
    91  func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
    92  	if tv == nil {
    93  		return utimensat(dirfd, path, nil, 0)
    94  	}
    95  
    96  	ts := []Timespec{
    97  		NsecToTimespec(TimevalToNsec(tv[0])),
    98  		NsecToTimespec(TimevalToNsec(tv[1])),
    99  	}
   100  	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   101  }
   102  
   103  func Time(t *Time_t) (Time_t, error) {
   104  	var tv Timeval
   105  	err := Gettimeofday(&tv)
   106  	if err != nil {
   107  		return 0, err
   108  	}
   109  	if t != nil {
   110  		*t = Time_t(tv.Sec)
   111  	}
   112  	return Time_t(tv.Sec), nil
   113  }
   114  
   115  func Utime(path string, buf *Utimbuf) error {
   116  	tv := []Timeval{
   117  		{Sec: buf.Actime},
   118  		{Sec: buf.Modtime},
   119  	}
   120  	return Utimes(path, tv)
   121  }
   122  
   123  func utimes(path string, tv *[2]Timeval) (err error) {
   124  	if tv == nil {
   125  		return utimensat(AT_FDCWD, path, nil, 0)
   126  	}
   127  
   128  	ts := []Timespec{
   129  		NsecToTimespec(TimevalToNsec(tv[0])),
   130  		NsecToTimespec(TimevalToNsec(tv[1])),
   131  	}
   132  	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   133  }
   134  
   135  // Getrlimit prefers the prlimit64 system call. See issue 38604.
   136  func Getrlimit(resource int, rlim *Rlimit) error {
   137  	err := Prlimit(0, resource, nil, rlim)
   138  	if err != ENOSYS {
   139  		return err
   140  	}
   141  	return getrlimit(resource, rlim)
   142  }
   143  
   144  func (r *PtraceRegs) PC() uint64 { return r.Pc }
   145  
   146  func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
   147  
   148  func (iov *Iovec) SetLen(length int) {
   149  	iov.Len = uint64(length)
   150  }
   151  
   152  func (msghdr *Msghdr) SetControllen(length int) {
   153  	msghdr.Controllen = uint64(length)
   154  }
   155  
   156  func (msghdr *Msghdr) SetIovlen(length int) {
   157  	msghdr.Iovlen = uint64(length)
   158  }
   159  
   160  func (cmsg *Cmsghdr) SetLen(length int) {
   161  	cmsg.Len = uint64(length)
   162  }
   163  
   164  func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
   165  	rsa.Service_name_len = uint64(length)
   166  }
   167  
   168  func Pause() error {
   169  	_, err := ppoll(nil, 0, nil, nil)
   170  	return err
   171  }
   172  
   173  //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
   174  
   175  func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
   176  	cmdlineLen := len(cmdline)
   177  	if cmdlineLen > 0 {
   178  		// Account for the additional NULL byte added by
   179  		// BytePtrFromString in kexecFileLoad. The kexec_file_load
   180  		// syscall expects a NULL-terminated string.
   181  		cmdlineLen++
   182  	}
   183  	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
   184  }
   185  
   186  const SYS_FSTATAT = SYS_NEWFSTATAT
   187
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