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  //go:build loong64 && linux
     6  
     7  package unix
     8  
     9  import "unsafe"
    10  
    11  //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
    12  //sys	Fchown(fd int, uid int, gid int) (err error)
    13  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
    14  //sys	Ftruncate(fd int, length int64) (err error)
    15  //sysnb	Getegid() (egid int)
    16  //sysnb	Geteuid() (euid int)
    17  //sysnb	Getgid() (gid int)
    18  //sysnb	Getuid() (uid int)
    19  //sys	Listen(s int, n int) (err error)
    20  //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    21  //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    22  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
    23  
    24  func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
    25  	var ts *Timespec
    26  	if timeout != nil {
    27  		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
    28  	}
    29  	return pselect6(nfd, r, w, e, ts, nil)
    30  }
    31  
    32  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
    33  //sys	setfsgid(gid int) (prev int, err error)
    34  //sys	setfsuid(uid int) (prev int, err error)
    35  //sys	Shutdown(fd int, how int) (err error)
    36  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
    37  
    38  func timespecFromStatxTimestamp(x StatxTimestamp) Timespec {
    39  	return Timespec{
    40  		Sec:  x.Sec,
    41  		Nsec: int64(x.Nsec),
    42  	}
    43  }
    44  
    45  func Fstatat(fd int, path string, stat *Stat_t, flags int) error {
    46  	var r Statx_t
    47  	// Do it the glibc way, add AT_NO_AUTOMOUNT.
    48  	if err := Statx(fd, path, AT_NO_AUTOMOUNT|flags, STATX_BASIC_STATS, &r); err != nil {
    49  		return err
    50  	}
    51  
    52  	stat.Dev = Mkdev(r.Dev_major, r.Dev_minor)
    53  	stat.Ino = r.Ino
    54  	stat.Mode = uint32(r.Mode)
    55  	stat.Nlink = r.Nlink
    56  	stat.Uid = r.Uid
    57  	stat.Gid = r.Gid
    58  	stat.Rdev = Mkdev(r.Rdev_major, r.Rdev_minor)
    59  	// hope we don't get to process files so large to overflow these size
    60  	// fields...
    61  	stat.Size = int64(r.Size)
    62  	stat.Blksize = int32(r.Blksize)
    63  	stat.Blocks = int64(r.Blocks)
    64  	stat.Atim = timespecFromStatxTimestamp(r.Atime)
    65  	stat.Mtim = timespecFromStatxTimestamp(r.Mtime)
    66  	stat.Ctim = timespecFromStatxTimestamp(r.Ctime)
    67  
    68  	return nil
    69  }
    70  
    71  func Fstat(fd int, stat *Stat_t) (err error) {
    72  	return Fstatat(fd, "", stat, AT_EMPTY_PATH)
    73  }
    74  
    75  func Stat(path string, stat *Stat_t) (err error) {
    76  	return Fstatat(AT_FDCWD, path, stat, 0)
    77  }
    78  
    79  func Lchown(path string, uid int, gid int) (err error) {
    80  	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
    81  }
    82  
    83  func Lstat(path string, stat *Stat_t) (err error) {
    84  	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
    85  }
    86  
    87  //sys	Statfs(path string, buf *Statfs_t) (err error)
    88  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
    89  //sys	Truncate(path string, length int64) (err error)
    90  
    91  func Ustat(dev int, ubuf *Ustat_t) (err error) {
    92  	return ENOSYS
    93  }
    94  
    95  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    96  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    97  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    98  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
    99  //sysnb	setgroups(n int, list *_Gid_t) (err error)
   100  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
   101  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
   102  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
   103  //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
   104  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   105  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   106  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
   107  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
   108  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
   109  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
   110  //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
   111  
   112  //sysnb	Gettimeofday(tv *Timeval) (err error)
   113  
   114  func setTimespec(sec, nsec int64) Timespec {
   115  	return Timespec{Sec: sec, Nsec: nsec}
   116  }
   117  
   118  func setTimeval(sec, usec int64) Timeval {
   119  	return Timeval{Sec: sec, Usec: usec}
   120  }
   121  
   122  func Getrlimit(resource int, rlim *Rlimit) (err error) {
   123  	err = Prlimit(0, resource, nil, rlim)
   124  	return
   125  }
   126  
   127  func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
   128  	if tv == nil {
   129  		return utimensat(dirfd, path, nil, 0)
   130  	}
   131  
   132  	ts := []Timespec{
   133  		NsecToTimespec(TimevalToNsec(tv[0])),
   134  		NsecToTimespec(TimevalToNsec(tv[1])),
   135  	}
   136  	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   137  }
   138  
   139  func Time(t *Time_t) (Time_t, error) {
   140  	var tv Timeval
   141  	err := Gettimeofday(&tv)
   142  	if err != nil {
   143  		return 0, err
   144  	}
   145  	if t != nil {
   146  		*t = Time_t(tv.Sec)
   147  	}
   148  	return Time_t(tv.Sec), nil
   149  }
   150  
   151  func Utime(path string, buf *Utimbuf) error {
   152  	if buf == nil {
   153  		return Utimes(path, nil)
   154  	}
   155  	tv := []Timeval{
   156  		{Sec: buf.Actime},
   157  		{Sec: buf.Modtime},
   158  	}
   159  	return Utimes(path, tv)
   160  }
   161  
   162  func utimes(path string, tv *[2]Timeval) (err error) {
   163  	if tv == nil {
   164  		return utimensat(AT_FDCWD, path, nil, 0)
   165  	}
   166  
   167  	ts := []Timespec{
   168  		NsecToTimespec(TimevalToNsec(tv[0])),
   169  		NsecToTimespec(TimevalToNsec(tv[1])),
   170  	}
   171  	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   172  }
   173  
   174  func (r *PtraceRegs) PC() uint64 { return r.Era }
   175  
   176  func (r *PtraceRegs) SetPC(era uint64) { r.Era = era }
   177  
   178  func (iov *Iovec) SetLen(length int) {
   179  	iov.Len = uint64(length)
   180  }
   181  
   182  func (msghdr *Msghdr) SetControllen(length int) {
   183  	msghdr.Controllen = uint64(length)
   184  }
   185  
   186  func (msghdr *Msghdr) SetIovlen(length int) {
   187  	msghdr.Iovlen = uint64(length)
   188  }
   189  
   190  func (cmsg *Cmsghdr) SetLen(length int) {
   191  	cmsg.Len = uint64(length)
   192  }
   193  
   194  func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
   195  	rsa.Service_name_len = uint64(length)
   196  }
   197  
   198  func Pause() error {
   199  	_, err := ppoll(nil, 0, nil, nil)
   200  	return err
   201  }
   202  
   203  func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
   204  	return Renameat2(olddirfd, oldpath, newdirfd, newpath, 0)
   205  }
   206  
   207  //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
   208  
   209  func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
   210  	cmdlineLen := len(cmdline)
   211  	if cmdlineLen > 0 {
   212  		// Account for the additional NULL byte added by
   213  		// BytePtrFromString in kexecFileLoad. The kexec_file_load
   214  		// syscall expects a NULL-terminated string.
   215  		cmdlineLen++
   216  	}
   217  	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
   218  }
   219  
   220  const SYS_FSTATAT = SYS_NEWFSTATAT
   221
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