github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/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 Getpagesize() int { return 4096 }
    15  
    16  func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
    17  
    18  func NsecToTimespec(nsec int64) (ts Timespec) {
    19  	ts.Sec = int32(nsec / 1e9)
    20  	ts.Nsec = int32(nsec % 1e9)
    21  	return
    22  }
    23  
    24  func NsecToTimeval(nsec int64) (tv Timeval) {
    25  	nsec += 999 // round up to microsecond
    26  	tv.Sec = int32(nsec / 1e9)
    27  	tv.Usec = int32(nsec % 1e9 / 1e3)
    28  	return
    29  }
    30  
    31  func Pipe(p []int) (err error) {
    32  	if len(p) != 2 {
    33  		return EINVAL
    34  	}
    35  	var pp [2]_C_int
    36  	err = pipe2(&pp, 0)
    37  	p[0] = int(pp[0])
    38  	p[1] = int(pp[1])
    39  	return
    40  }
    41  
    42  //sysnb pipe2(p *[2]_C_int, flags int) (err error)
    43  
    44  func Pipe2(p []int, flags int) (err error) {
    45  	if len(p) != 2 {
    46  		return EINVAL
    47  	}
    48  	var pp [2]_C_int
    49  	err = pipe2(&pp, flags)
    50  	p[0] = int(pp[0])
    51  	p[1] = int(pp[1])
    52  	return
    53  }
    54  
    55  // Underlying system call writes to newoffset via pointer.
    56  // Implemented in assembly to avoid allocation.
    57  func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)
    58  
    59  func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
    60  	newoffset, errno := seek(fd, offset, whence)
    61  	if errno != 0 {
    62  		return 0, errno
    63  	}
    64  	return newoffset, nil
    65  }
    66  
    67  //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
    68  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    69  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    70  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    71  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
    72  //sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
    73  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    74  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    75  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    76  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    77  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    78  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    79  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    80  //sysnb	socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
    81  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    82  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    83  
    84  // 64-bit file system and 32-bit uid calls
    85  // (16-bit uid calls are not always supported in newer kernels)
    86  //sys	Dup2(oldfd int, newfd int) (err error)
    87  //sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
    88  //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
    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	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
    98  //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
    99  //sys	Setfsgid(gid int) (err error) = SYS_SETFSGID32
   100  //sys	Setfsuid(uid int) (err error) = SYS_SETFSUID32
   101  //sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
   102  //sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
   103  //sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
   104  //sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
   105  //sys	Shutdown(fd int, how int) (err error)
   106  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
   107  //sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
   108  
   109  // Vsyscalls on amd64.
   110  //sysnb	Gettimeofday(tv *Timeval) (err error)
   111  //sysnb	Time(t *Time_t) (tt Time_t, err error)
   112  
   113  //sys   Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
   114  //sys   Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
   115  //sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
   116  //sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
   117  
   118  func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
   119  	_, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
   120  	if e1 != 0 {
   121  		err = errnoErr(e1)
   122  	}
   123  	return
   124  }
   125  
   126  //sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
   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  }