Source file src/pkg/syscall/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	package syscall
     6	
     7	import "unsafe"
     8	
     9	const (
    10		_SYS_dup       = SYS_DUP2
    11		_SYS_setgroups = SYS_SETGROUPS32
    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 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	//sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
    85	//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
    86	//sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
    87	//sysnb	Getegid() (egid int) = SYS_GETEGID32
    88	//sysnb	Geteuid() (euid int) = SYS_GETEUID32
    89	//sysnb	Getgid() (gid int) = SYS_GETGID32
    90	//sysnb	Getuid() (uid int) = SYS_GETUID32
    91	//sysnb	InotifyInit() (fd int, err error)
    92	//sys	Listen(s int, n int) (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	
   104	// Vsyscalls on amd64.
   105	//sysnb	Gettimeofday(tv *Timeval) (err error)
   106	//sysnb	Time(t *Time_t) (tt Time_t, err error)
   107	
   108	//sys   Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
   109	//sys   Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
   110	//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
   111	//sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
   112	
   113	//sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
   114	//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
   115	
   116	func Stat(path string, stat *Stat_t) (err error) {
   117		return fstatat(_AT_FDCWD, path, stat, 0)
   118	}
   119	
   120	func Lchown(path string, uid int, gid int) (err error) {
   121		return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
   122	}
   123	
   124	func Lstat(path string, stat *Stat_t) (err error) {
   125		return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
   126	}
   127	
   128	func Fstatfs(fd int, buf *Statfs_t) (err error) {
   129		_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   130		if e != 0 {
   131			err = e
   132		}
   133		return
   134	}
   135	
   136	func Statfs(path string, buf *Statfs_t) (err error) {
   137		pathp, err := BytePtrFromString(path)
   138		if err != nil {
   139			return err
   140		}
   141		_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
   142		if e != 0 {
   143			err = e
   144		}
   145		return
   146	}
   147	
   148	func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
   149		page := uintptr(offset / 4096)
   150		if offset != int64(page)*4096 {
   151			return 0, EINVAL
   152		}
   153		return mmap2(addr, length, prot, flags, fd, page)
   154	}
   155	
   156	type rlimit32 struct {
   157		Cur uint32
   158		Max uint32
   159	}
   160	
   161	//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
   162	
   163	const rlimInf32 = ^uint32(0)
   164	const rlimInf64 = ^uint64(0)
   165	
   166	func Getrlimit(resource int, rlim *Rlimit) (err error) {
   167		err = prlimit(0, resource, nil, rlim)
   168		if err != ENOSYS {
   169			return err
   170		}
   171	
   172		rl := rlimit32{}
   173		err = getrlimit(resource, &rl)
   174		if err != nil {
   175			return
   176		}
   177	
   178		if rl.Cur == rlimInf32 {
   179			rlim.Cur = rlimInf64
   180		} else {
   181			rlim.Cur = uint64(rl.Cur)
   182		}
   183	
   184		if rl.Max == rlimInf32 {
   185			rlim.Max = rlimInf64
   186		} else {
   187			rlim.Max = uint64(rl.Max)
   188		}
   189		return
   190	}
   191	
   192	//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
   193	
   194	func Setrlimit(resource int, rlim *Rlimit) (err error) {
   195		err = prlimit(0, resource, rlim, nil)
   196		if err != ENOSYS {
   197			return err
   198		}
   199	
   200		rl := rlimit32{}
   201		if rlim.Cur == rlimInf64 {
   202			rl.Cur = rlimInf32
   203		} else if rlim.Cur < uint64(rlimInf32) {
   204			rl.Cur = uint32(rlim.Cur)
   205		} else {
   206			return EINVAL
   207		}
   208		if rlim.Max == rlimInf64 {
   209			rl.Max = rlimInf32
   210		} else if rlim.Max < uint64(rlimInf32) {
   211			rl.Max = uint32(rlim.Max)
   212		} else {
   213			return EINVAL
   214		}
   215	
   216		return setrlimit(resource, &rl)
   217	}
   218	
   219	func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
   220	
   221	func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
   222	
   223	func (iov *Iovec) SetLen(length int) {
   224		iov.Len = uint32(length)
   225	}
   226	
   227	func (msghdr *Msghdr) SetControllen(length int) {
   228		msghdr.Controllen = uint32(length)
   229	}
   230	
   231	func (cmsg *Cmsghdr) SetLen(length int) {
   232		cmsg.Len = uint32(length)
   233	}
   234	
   235	func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) {
   236		panic("not implemented")
   237	}
   238	

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