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