syscall_linux_arm.go

     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  //go:build arm && linux
     6  
     7  package unix
     8  
     9  import (
    10  	"unsafe"
    11  )
    12  
    13  func setTimespec(sec, nsec int64) Timespec {
    14  	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
    15  }
    16  
    17  func setTimeval(sec, usec int64) Timeval {
    18  	return Timeval{Sec: int32(sec), Usec: int32(usec)}
    19  }
    20  
    21  func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
    22  	newoffset, errno := seek(fd, offset, whence)
    23  	if errno != 0 {
    24  		return 0, errno
    25  	}
    26  	return newoffset, nil
    27  }
    28  
    29  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    30  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    31  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    32  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
    33  //sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
    34  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    35  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    36  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    37  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    38  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    39  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    40  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    41  //sysnb	socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
    42  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    43  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    44  
    45  // 64-bit file system and 32-bit uid calls
    46  // (16-bit uid calls are not always supported in newer kernels)
    47  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
    48  //sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
    49  //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
    50  //sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
    51  //sysnb	Getegid() (egid int) = SYS_GETEGID32
    52  //sysnb	Geteuid() (euid int) = SYS_GETEUID32
    53  //sysnb	Getgid() (gid int) = SYS_GETGID32
    54  //sysnb	Getuid() (uid int) = SYS_GETUID32
    55  //sys	Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
    56  //sys	Listen(s int, n int) (err error)
    57  //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
    58  //sys	Pause() (err error)
    59  //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    60  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
    61  //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
    62  //sys	setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32
    63  //sys	setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32
    64  //sys	Shutdown(fd int, how int) (err error)
    65  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
    66  //sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
    67  //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
    68  
    69  //sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
    70  //sysnb	Gettimeofday(tv *Timeval) (err error)
    71  
    72  func Time(t *Time_t) (Time_t, error) {
    73  	var tv Timeval
    74  	err := Gettimeofday(&tv)
    75  	if err != nil {
    76  		return 0, err
    77  	}
    78  	if t != nil {
    79  		*t = Time_t(tv.Sec)
    80  	}
    81  	return Time_t(tv.Sec), nil
    82  }
    83  
    84  func Utime(path string, buf *Utimbuf) error {
    85  	if buf == nil {
    86  		return Utimes(path, nil)
    87  	}
    88  	tv := []Timeval{
    89  		{Sec: buf.Actime},
    90  		{Sec: buf.Modtime},
    91  	}
    92  	return Utimes(path, tv)
    93  }
    94  
    95  //sys	utimes(path string, times *[2]Timeval) (err error)
    96  
    97  //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    98  //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    99  //sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
   100  //sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
   101  
   102  func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
   103  	_, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
   104  	if e1 != 0 {
   105  		err = errnoErr(e1)
   106  	}
   107  	return
   108  }
   109  
   110  //sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
   111  
   112  func Fstatfs(fd int, buf *Statfs_t) (err error) {
   113  	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   114  	if e != 0 {
   115  		err = e
   116  	}
   117  	return
   118  }
   119  
   120  func Statfs(path string, buf *Statfs_t) (err error) {
   121  	pathp, err := BytePtrFromString(path)
   122  	if err != nil {
   123  		return err
   124  	}
   125  	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   126  	if e != 0 {
   127  		err = e
   128  	}
   129  	return
   130  }
   131  
   132  func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
   133  	page := uintptr(offset / 4096)
   134  	if offset != int64(page)*4096 {
   135  		return 0, EINVAL
   136  	}
   137  	return mmap2(addr, length, prot, flags, fd, page)
   138  }
   139  
   140  type rlimit32 struct {
   141  	Cur uint32
   142  	Max uint32
   143  }
   144  
   145  //sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
   146  
   147  const rlimInf32 = ^uint32(0)
   148  const rlimInf64 = ^uint64(0)
   149  
   150  func Getrlimit(resource int, rlim *Rlimit) (err error) {
   151  	err = Prlimit(0, resource, nil, rlim)
   152  	if err != ENOSYS {
   153  		return err
   154  	}
   155  
   156  	rl := rlimit32{}
   157  	err = getrlimit(resource, &rl)
   158  	if err != nil {
   159  		return
   160  	}
   161  
   162  	if rl.Cur == rlimInf32 {
   163  		rlim.Cur = rlimInf64
   164  	} else {
   165  		rlim.Cur = uint64(rl.Cur)
   166  	}
   167  
   168  	if rl.Max == rlimInf32 {
   169  		rlim.Max = rlimInf64
   170  	} else {
   171  		rlim.Max = uint64(rl.Max)
   172  	}
   173  	return
   174  }
   175  
   176  func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
   177  
   178  func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
   179  
   180  func (iov *Iovec) SetLen(length int) {
   181  	iov.Len = uint32(length)
   182  }
   183  
   184  func (msghdr *Msghdr) SetControllen(length int) {
   185  	msghdr.Controllen = uint32(length)
   186  }
   187  
   188  func (msghdr *Msghdr) SetIovlen(length int) {
   189  	msghdr.Iovlen = uint32(length)
   190  }
   191  
   192  func (cmsg *Cmsghdr) SetLen(length int) {
   193  	cmsg.Len = uint32(length)
   194  }
   195  
   196  func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
   197  	rsa.Service_name_len = uint32(length)
   198  }
   199  
   200  //sys	armSyncFileRange(fd int, flags int, off int64, n int64) (err error) = SYS_ARM_SYNC_FILE_RANGE
   201  
   202  func SyncFileRange(fd int, off int64, n int64, flags int) error {
   203  	// The sync_file_range and arm_sync_file_range syscalls differ only in the
   204  	// order of their arguments.
   205  	return armSyncFileRange(fd, flags, off, n)
   206  }
   207  
   208  //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
   209  
   210  func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
   211  	cmdlineLen := len(cmdline)
   212  	if cmdlineLen > 0 {
   213  		// Account for the additional NULL byte added by
   214  		// BytePtrFromString in kexecFileLoad. The kexec_file_load
   215  		// syscall expects a NULL-terminated string.
   216  		cmdlineLen++
   217  	}
   218  	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
   219  }
   220
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