github.com/go-xe2/third@v1.0.3/golang.org/x/sys/unix/syscall_linux_arm.go (about)

     1  // Copyright 2009 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  // +build arm,linux
     6  
     7  package unix
     8  
     9  import (
    10  	"syscall"
    11  	"unsafe"
    12  )
    13  
    14  func setTimespec(sec, nsec int64) Timespec {
    15  	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
    16  }
    17  
    18  func setTimeval(sec, usec int64) Timeval {
    19  	return Timeval{Sec: int32(sec), Usec: int32(usec)}
    20  }
    21  
    22  func Pipe(p []int) (err error) {
    23  	if len(p) != 2 {
    24  		return EINVAL
    25  	}
    26  	var pp [2]_C_int
    27  	err = pipe2(&pp, 0)
    28  	p[0] = int(pp[0])
    29  	p[1] = int(pp[1])
    30  	return
    31  }
    32  
    33  //sysnb pipe2(p *[2]_C_int, flags int) (err error)
    34  
    35  func Pipe2(p []int, flags int) (err error) {
    36  	if len(p) != 2 {
    37  		return EINVAL
    38  	}
    39  	var pp [2]_C_int
    40  	err = pipe2(&pp, flags)
    41  	p[0] = int(pp[0])
    42  	p[1] = int(pp[1])
    43  	return
    44  }
    45  
    46  // Underlying system call writes to newoffset via pointer.
    47  // Implemented in assembly to avoid allocation.
    48  func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)
    49  
    50  func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
    51  	newoffset, errno := seek(fd, offset, whence)
    52  	if errno != 0 {
    53  		return 0, errno
    54  	}
    55  	return newoffset, nil
    56  }
    57  
    58  //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
    59  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    60  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    61  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    62  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
    63  //sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
    64  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    65  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    66  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    67  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    68  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    69  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    70  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    71  //sysnb	socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
    72  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    73  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    74  
    75  // 64-bit file system and 32-bit uid calls
    76  // (16-bit uid calls are not always supported in newer kernels)
    77  //sys	Dup2(oldfd int, newfd int) (err error)
    78  //sysnb	EpollCreate(size int) (fd int, err error)
    79  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
    80  //sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
    81  //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
    82  //sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
    83  //sysnb	Getegid() (egid int) = SYS_GETEGID32
    84  //sysnb	Geteuid() (euid int) = SYS_GETEUID32
    85  //sysnb	Getgid() (gid int) = SYS_GETGID32
    86  //sysnb	Getuid() (uid int) = SYS_GETUID32
    87  //sysnb	InotifyInit() (fd int, err error)
    88  //sys	Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
    89  //sys	Listen(s int, n int) (err error)
    90  //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
    91  //sys	Pause() (err error)
    92  //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    93  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
    94  //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
    95  //sys	Setfsgid(gid int) (err error) = SYS_SETFSGID32
    96  //sys	Setfsuid(uid int) (err error) = SYS_SETFSUID32
    97  //sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
    98  //sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
    99  //sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
   100  //sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
   101  //sys	Shutdown(fd int, how int) (err error)
   102  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
   103  //sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
   104  //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
   105  
   106  //sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
   107  //sysnb	Gettimeofday(tv *Timeval) (err error)
   108  
   109  func Time(t *Time_t) (Time_t, error) {
   110  	var tv Timeval
   111  	err := Gettimeofday(&tv)
   112  	if err != nil {
   113  		return 0, err
   114  	}
   115  	if t != nil {
   116  		*t = Time_t(tv.Sec)
   117  	}
   118  	return Time_t(tv.Sec), nil
   119  }
   120  
   121  func Utime(path string, buf *Utimbuf) error {
   122  	tv := []Timeval{
   123  		{Sec: buf.Actime},
   124  		{Sec: buf.Modtime},
   125  	}
   126  	return Utimes(path, tv)
   127  }
   128  
   129  //sys	utimes(path string, times *[2]Timeval) (err error)
   130  
   131  //sys   Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
   132  //sys   Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
   133  //sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
   134  //sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
   135  
   136  func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
   137  	_, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
   138  	if e1 != 0 {
   139  		err = errnoErr(e1)
   140  	}
   141  	return
   142  }
   143  
   144  //sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
   145  
   146  func Fstatfs(fd int, buf *Statfs_t) (err error) {
   147  	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   148  	if e != 0 {
   149  		err = e
   150  	}
   151  	return
   152  }
   153  
   154  func Statfs(path string, buf *Statfs_t) (err error) {
   155  	pathp, err := BytePtrFromString(path)
   156  	if err != nil {
   157  		return err
   158  	}
   159  	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   160  	if e != 0 {
   161  		err = e
   162  	}
   163  	return
   164  }
   165  
   166  func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
   167  	page := uintptr(offset / 4096)
   168  	if offset != int64(page)*4096 {
   169  		return 0, EINVAL
   170  	}
   171  	return mmap2(addr, length, prot, flags, fd, page)
   172  }
   173  
   174  type rlimit32 struct {
   175  	Cur uint32
   176  	Max uint32
   177  }
   178  
   179  //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
   180  
   181  const rlimInf32 = ^uint32(0)
   182  const rlimInf64 = ^uint64(0)
   183  
   184  func Getrlimit(resource int, rlim *Rlimit) (err error) {
   185  	err = prlimit(0, resource, nil, rlim)
   186  	if err != ENOSYS {
   187  		return err
   188  	}
   189  
   190  	rl := rlimit32{}
   191  	err = getrlimit(resource, &rl)
   192  	if err != nil {
   193  		return
   194  	}
   195  
   196  	if rl.Cur == rlimInf32 {
   197  		rlim.Cur = rlimInf64
   198  	} else {
   199  		rlim.Cur = uint64(rl.Cur)
   200  	}
   201  
   202  	if rl.Max == rlimInf32 {
   203  		rlim.Max = rlimInf64
   204  	} else {
   205  		rlim.Max = uint64(rl.Max)
   206  	}
   207  	return
   208  }
   209  
   210  //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
   211  
   212  func Setrlimit(resource int, rlim *Rlimit) (err error) {
   213  	err = prlimit(0, resource, rlim, nil)
   214  	if err != ENOSYS {
   215  		return err
   216  	}
   217  
   218  	rl := rlimit32{}
   219  	if rlim.Cur == rlimInf64 {
   220  		rl.Cur = rlimInf32
   221  	} else if rlim.Cur < uint64(rlimInf32) {
   222  		rl.Cur = uint32(rlim.Cur)
   223  	} else {
   224  		return EINVAL
   225  	}
   226  	if rlim.Max == rlimInf64 {
   227  		rl.Max = rlimInf32
   228  	} else if rlim.Max < uint64(rlimInf32) {
   229  		rl.Max = uint32(rlim.Max)
   230  	} else {
   231  		return EINVAL
   232  	}
   233  
   234  	return setrlimit(resource, &rl)
   235  }
   236  
   237  func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
   238  
   239  func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
   240  
   241  func (iov *Iovec) SetLen(length int) {
   242  	iov.Len = uint32(length)
   243  }
   244  
   245  func (msghdr *Msghdr) SetControllen(length int) {
   246  	msghdr.Controllen = uint32(length)
   247  }
   248  
   249  func (cmsg *Cmsghdr) SetLen(length int) {
   250  	cmsg.Len = uint32(length)
   251  }
   252  
   253  //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
   254  
   255  func Poll(fds []PollFd, timeout int) (n int, err error) {
   256  	if len(fds) == 0 {
   257  		return poll(nil, 0, timeout)
   258  	}
   259  	return poll(&fds[0], len(fds), timeout)
   260  }
   261  
   262  //sys	armSyncFileRange(fd int, flags int, off int64, n int64) (err error) = SYS_ARM_SYNC_FILE_RANGE
   263  
   264  func SyncFileRange(fd int, off int64, n int64, flags int) error {
   265  	// The sync_file_range and arm_sync_file_range syscalls differ only in the
   266  	// order of their arguments.
   267  	return armSyncFileRange(fd, flags, off, n)
   268  }