Source file src/cmd/vendor/golang.org/x/sys/unix/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	// +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	//sysnb	pipe(p *[2]_C_int) (err error)
    23	
    24	func Pipe(p []int) (err error) {
    25		if len(p) != 2 {
    26			return EINVAL
    27		}
    28		var pp [2]_C_int
    29		// Try pipe2 first for Android O, then try pipe for kernel 2.6.23.
    30		err = pipe2(&pp, 0)
    31		if err == ENOSYS {
    32			err = pipe(&pp)
    33		}
    34		p[0] = int(pp[0])
    35		p[1] = int(pp[1])
    36		return
    37	}
    38	
    39	//sysnb pipe2(p *[2]_C_int, flags int) (err error)
    40	
    41	func Pipe2(p []int, flags int) (err error) {
    42		if len(p) != 2 {
    43			return EINVAL
    44		}
    45		var pp [2]_C_int
    46		err = pipe2(&pp, flags)
    47		p[0] = int(pp[0])
    48		p[1] = int(pp[1])
    49		return
    50	}
    51	
    52	// Underlying system call writes to newoffset via pointer.
    53	// Implemented in assembly to avoid allocation.
    54	func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)
    55	
    56	func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
    57		newoffset, errno := seek(fd, offset, whence)
    58		if errno != 0 {
    59			return 0, errno
    60		}
    61		return newoffset, nil
    62	}
    63	
    64	//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
    65	//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    66	//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    67	//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    68	//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
    69	//sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
    70	//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    71	//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    72	//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    73	//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    74	//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    75	//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    76	//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    77	//sysnb	socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
    78	//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    79	//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    80	
    81	// 64-bit file system and 32-bit uid calls
    82	// (16-bit uid calls are not always supported in newer kernels)
    83	//sys	Dup2(oldfd int, newfd int) (err error)
    84	//sysnb	EpollCreate(size int) (fd int, err error)
    85	//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
    86	//sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
    87	//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
    88	//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
    89	//sysnb	Getegid() (egid int) = SYS_GETEGID32
    90	//sysnb	Geteuid() (euid int) = SYS_GETEUID32
    91	//sysnb	Getgid() (gid int) = SYS_GETGID32
    92	//sysnb	Getuid() (uid int) = SYS_GETUID32
    93	//sysnb	InotifyInit() (fd int, err error)
    94	//sys	Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
    95	//sys	Listen(s int, n int) (err error)
    96	//sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
    97	//sys	Pause() (err error)
    98	//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
    99	//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
   100	//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
   101	//sys	Setfsgid(gid int) (err error) = SYS_SETFSGID32
   102	//sys	Setfsuid(uid int) (err error) = SYS_SETFSUID32
   103	//sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
   104	//sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
   105	//sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
   106	//sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
   107	//sys	Shutdown(fd int, how int) (err error)
   108	//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
   109	//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
   110	//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
   111	
   112	//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
   113	//sysnb	Gettimeofday(tv *Timeval) (err error)
   114	
   115	func Time(t *Time_t) (Time_t, error) {
   116		var tv Timeval
   117		err := Gettimeofday(&tv)
   118		if err != nil {
   119			return 0, err
   120		}
   121		if t != nil {
   122			*t = Time_t(tv.Sec)
   123		}
   124		return Time_t(tv.Sec), nil
   125	}
   126	
   127	func Utime(path string, buf *Utimbuf) error {
   128		tv := []Timeval{
   129			{Sec: buf.Actime},
   130			{Sec: buf.Modtime},
   131		}
   132		return Utimes(path, tv)
   133	}
   134	
   135	//sys	utimes(path string, times *[2]Timeval) (err error)
   136	
   137	//sys   Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
   138	//sys   Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
   139	//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
   140	//sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
   141	
   142	func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
   143		_, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
   144		if e1 != 0 {
   145			err = errnoErr(e1)
   146		}
   147		return
   148	}
   149	
   150	//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
   151	
   152	func Fstatfs(fd int, buf *Statfs_t) (err error) {
   153		_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   154		if e != 0 {
   155			err = e
   156		}
   157		return
   158	}
   159	
   160	func Statfs(path string, buf *Statfs_t) (err error) {
   161		pathp, err := BytePtrFromString(path)
   162		if err != nil {
   163			return err
   164		}
   165		_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   166		if e != 0 {
   167			err = e
   168		}
   169		return
   170	}
   171	
   172	func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
   173		page := uintptr(offset / 4096)
   174		if offset != int64(page)*4096 {
   175			return 0, EINVAL
   176		}
   177		return mmap2(addr, length, prot, flags, fd, page)
   178	}
   179	
   180	type rlimit32 struct {
   181		Cur uint32
   182		Max uint32
   183	}
   184	
   185	//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
   186	
   187	const rlimInf32 = ^uint32(0)
   188	const rlimInf64 = ^uint64(0)
   189	
   190	func Getrlimit(resource int, rlim *Rlimit) (err error) {
   191		err = prlimit(0, resource, nil, rlim)
   192		if err != ENOSYS {
   193			return err
   194		}
   195	
   196		rl := rlimit32{}
   197		err = getrlimit(resource, &rl)
   198		if err != nil {
   199			return
   200		}
   201	
   202		if rl.Cur == rlimInf32 {
   203			rlim.Cur = rlimInf64
   204		} else {
   205			rlim.Cur = uint64(rl.Cur)
   206		}
   207	
   208		if rl.Max == rlimInf32 {
   209			rlim.Max = rlimInf64
   210		} else {
   211			rlim.Max = uint64(rl.Max)
   212		}
   213		return
   214	}
   215	
   216	//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
   217	
   218	func Setrlimit(resource int, rlim *Rlimit) (err error) {
   219		err = prlimit(0, resource, rlim, nil)
   220		if err != ENOSYS {
   221			return err
   222		}
   223	
   224		rl := rlimit32{}
   225		if rlim.Cur == rlimInf64 {
   226			rl.Cur = rlimInf32
   227		} else if rlim.Cur < uint64(rlimInf32) {
   228			rl.Cur = uint32(rlim.Cur)
   229		} else {
   230			return EINVAL
   231		}
   232		if rlim.Max == rlimInf64 {
   233			rl.Max = rlimInf32
   234		} else if rlim.Max < uint64(rlimInf32) {
   235			rl.Max = uint32(rlim.Max)
   236		} else {
   237			return EINVAL
   238		}
   239	
   240		return setrlimit(resource, &rl)
   241	}
   242	
   243	func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
   244	
   245	func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
   246	
   247	func (iov *Iovec) SetLen(length int) {
   248		iov.Len = uint32(length)
   249	}
   250	
   251	func (msghdr *Msghdr) SetControllen(length int) {
   252		msghdr.Controllen = uint32(length)
   253	}
   254	
   255	func (cmsg *Cmsghdr) SetLen(length int) {
   256		cmsg.Len = uint32(length)
   257	}
   258	
   259	//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
   260	
   261	func Poll(fds []PollFd, timeout int) (n int, err error) {
   262		if len(fds) == 0 {
   263			return poll(nil, 0, timeout)
   264		}
   265		return poll(&fds[0], len(fds), timeout)
   266	}
   267	
   268	//sys	armSyncFileRange(fd int, flags int, off int64, n int64) (err error) = SYS_ARM_SYNC_FILE_RANGE
   269	
   270	func SyncFileRange(fd int, off int64, n int64, flags int) error {
   271		// The sync_file_range and arm_sync_file_range syscalls differ only in the
   272		// order of their arguments.
   273		return armSyncFileRange(fd, flags, off, n)
   274	}
   275	

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