syscall_linux_loong64.go

     1  // Copyright 2022 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_SETGROUPS
    11  	_SYS_clone3     = 435
    12  	_SYS_faccessat2 = 439
    13  )
    14  
    15  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
    16  //sys	Fchown(fd int, uid int, gid int) (err error)
    17  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
    18  //sys	Ftruncate(fd int, length int64) (err error)
    19  //sysnb	Getegid() (egid int)
    20  //sysnb	Geteuid() (euid int)
    21  //sysnb	Getgid() (gid int)
    22  //sysnb	Getuid() (uid int)
    23  //sys	Listen(s int, n int) (err error)
    24  //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    25  //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    26  //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) = SYS_RENAMEAT2
    27  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
    28  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
    29  //sys	Setfsgid(gid int) (err error)
    30  //sys	Setfsuid(uid int) (err error)
    31  //sys	Shutdown(fd int, how int) (err error)
    32  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
    33  //sys	statx(dirfd int, path string, flags int, mask int, stat *statx_t) (err error)
    34  
    35  // makedev makes C dev_t from major and minor numbers the glibc way:
    36  // 0xMMMM_MMMM 0xmmmm_mmmm -> 0xMMMM_Mmmm_mmmM_MMmm
    37  func makedev(major uint32, minor uint32) uint64 {
    38  	majorH := uint64(major >> 12)
    39  	majorL := uint64(major & 0xfff)
    40  	minorH := uint64(minor >> 8)
    41  	minorL := uint64(minor & 0xff)
    42  	return (majorH << 44) | (minorH << 20) | (majorL << 8) | minorL
    43  }
    44  
    45  func timespecFromStatxTimestamp(x statxTimestamp) Timespec {
    46  	return Timespec{
    47  		Sec:  x.Sec,
    48  		Nsec: int64(x.Nsec),
    49  	}
    50  }
    51  
    52  func fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) {
    53  	var r statx_t
    54  	// Do it the glibc way, add AT_NO_AUTOMOUNT.
    55  	if err = statx(dirfd, path, _AT_NO_AUTOMOUNT|flags, _STATX_BASIC_STATS, &r); err != nil {
    56  		return err
    57  	}
    58  
    59  	stat.Dev = makedev(r.Dev_major, r.Dev_minor)
    60  	stat.Ino = r.Ino
    61  	stat.Mode = uint32(r.Mode)
    62  	stat.Nlink = r.Nlink
    63  	stat.Uid = r.Uid
    64  	stat.Gid = r.Gid
    65  	stat.Rdev = makedev(r.Rdev_major, r.Rdev_minor)
    66  	// hope we don't get to process files so large to overflow these size
    67  	// fields...
    68  	stat.Size = int64(r.Size)
    69  	stat.Blksize = int32(r.Blksize)
    70  	stat.Blocks = int64(r.Blocks)
    71  	stat.Atim = timespecFromStatxTimestamp(r.Atime)
    72  	stat.Mtim = timespecFromStatxTimestamp(r.Mtime)
    73  	stat.Ctim = timespecFromStatxTimestamp(r.Ctime)
    74  
    75  	return nil
    76  }
    77  
    78  func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
    79  	return fstatat(fd, path, stat, flags)
    80  }
    81  
    82  func Fstat(fd int, stat *Stat_t) (err error) {
    83  	return fstatat(fd, "", stat, _AT_EMPTY_PATH)
    84  }
    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  //sys	Statfs(path string, buf *Statfs_t) (err error)
    99  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
   100  //sys	Truncate(path string, length int64) (err error)
   101  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
   102  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
   103  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
   104  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
   105  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
   106  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
   107  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
   108  //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
   109  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   110  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   111  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
   112  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
   113  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
   114  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
   115  //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
   116  
   117  type sigset_t struct {
   118  	X__val [16]uint64
   119  }
   120  
   121  //sys	pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
   122  
   123  func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
   124  	var ts *Timespec
   125  	if timeout != nil {
   126  		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
   127  	}
   128  	return pselect(nfd, r, w, e, ts, nil)
   129  }
   130  
   131  //sysnb	Gettimeofday(tv *Timeval) (err error)
   132  
   133  func setTimespec(sec, nsec int64) Timespec {
   134  	return Timespec{Sec: sec, Nsec: nsec}
   135  }
   136  
   137  func setTimeval(sec, usec int64) Timeval {
   138  	return Timeval{Sec: sec, Usec: usec}
   139  }
   140  
   141  func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
   142  	if tv == nil {
   143  		return utimensat(dirfd, path, nil, 0)
   144  	}
   145  
   146  	ts := []Timespec{
   147  		NsecToTimespec(TimevalToNsec(tv[0])),
   148  		NsecToTimespec(TimevalToNsec(tv[1])),
   149  	}
   150  	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   151  }
   152  
   153  func Time(t *Time_t) (Time_t, error) {
   154  	var tv Timeval
   155  	err := Gettimeofday(&tv)
   156  	if err != nil {
   157  		return 0, err
   158  	}
   159  	if t != nil {
   160  		*t = Time_t(tv.Sec)
   161  	}
   162  	return Time_t(tv.Sec), nil
   163  }
   164  
   165  func Utime(path string, buf *Utimbuf) error {
   166  	tv := []Timeval{
   167  		{Sec: buf.Actime},
   168  		{Sec: buf.Modtime},
   169  	}
   170  	return Utimes(path, tv)
   171  }
   172  
   173  func utimes(path string, tv *[2]Timeval) (err error) {
   174  	if tv == nil {
   175  		return utimensat(_AT_FDCWD, path, nil, 0)
   176  	}
   177  
   178  	ts := []Timespec{
   179  		NsecToTimespec(TimevalToNsec(tv[0])),
   180  		NsecToTimespec(TimevalToNsec(tv[1])),
   181  	}
   182  	return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   183  }
   184  
   185  // Getrlimit prefers the prlimit64 system call.
   186  func Getrlimit(resource int, rlim *Rlimit) error {
   187  	return prlimit(0, resource, nil, rlim)
   188  }
   189  
   190  // setrlimit prefers the prlimit64 system call.
   191  func setrlimit(resource int, rlim *Rlimit) error {
   192  	return prlimit(0, resource, rlim, nil)
   193  }
   194  
   195  //go:nosplit
   196  func rawSetrlimit(resource int, rlim *Rlimit) Errno {
   197  	_, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
   198  	return errno
   199  }
   200  
   201  func (r *PtraceRegs) GetEra() uint64 { return r.Era }
   202  
   203  func (r *PtraceRegs) SetEra(era uint64) { r.Era = era }
   204  
   205  func (iov *Iovec) SetLen(length int) {
   206  	iov.Len = uint64(length)
   207  }
   208  
   209  func (msghdr *Msghdr) SetControllen(length int) {
   210  	msghdr.Controllen = uint64(length)
   211  }
   212  
   213  func (cmsg *Cmsghdr) SetLen(length int) {
   214  	cmsg.Len = uint64(length)
   215  }
   216  
   217  func InotifyInit() (fd int, err error) {
   218  	return InotifyInit1(0)
   219  }
   220  
   221  //sys	ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error)
   222  
   223  func Pause() error {
   224  	_, err := ppoll(nil, 0, nil, nil)
   225  	return err
   226  }
   227
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