sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c

   1 /* Copyright (C) 1997-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22
  23 #include <sysdep-cancel.h>
  24 #include <sys/syscall.h>
  25
  26 #include <kernel-features.h>
  27
  28
  29 ssize_t
  30 __libc_pwrite (fd, buf, count, offset)
  31      int fd;
  32      const void *buf;
  33      size_t count;
  34      off_t offset;
  35 {
  36   ssize_t result;
  37
  38   if (SINGLE_THREAD_P)
  39     {
  40       /* On PPC32 64bit values are aligned in odd/even register pairs.  */
  41       result = INLINE_SYSCALL (pwrite, 6, fd, buf, count,
  42                                0, offset >> 31, offset);
  43
  44       return result;
  45     }
  46
  47   int oldtype = LIBC_CANCEL_ASYNC ();
  48
  49   /* On PPC32 64bit values are aligned in odd/even register pairs.  */
  50   result = INLINE_SYSCALL (pwrite, 6, fd, buf, count,
  51                            0, offset >> 31, offset);
  52
  53   LIBC_CANCEL_RESET (oldtype);
  54
  55   return result;
  56 }
  57
  58 strong_alias (__libc_pwrite, __pwrite)
  59 weak_alias (__libc_pwrite, pwrite)