sysdeps/unix/sysv/linux/arm/eabi/pwrite64.c

   1 /* Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2005
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <endian.h>
  23 #include <unistd.h>
  24
  25 #include <sysdep-cancel.h>
  26 #include <sys/syscall.h>
  27 #include <bp-checks.h>
  28
  29 ssize_t
  30 __libc_pwrite64 (fd, buf, count, offset)
  31      int fd;
  32      const void *buf;
  33      size_t count;
  34      off64_t offset;
  35 {
  36   ssize_t result;
  37
  38   if (SINGLE_THREAD_P)
  39     {
  40       /* In the ARM EABI, 64-bit values are aligned to even/odd register
  41          pairs for syscalls.  */
  42       result = INLINE_SYSCALL (pwrite64, 6, fd, CHECK_N (buf, count), count, 0,
  43                                __LONG_LONG_PAIR ((off_t) (offset >> 32),
  44                                                  (off_t) (offset & 0xffffffff)));
  45
  46       return result;
  47     }
  48
  49   int oldtype = LIBC_CANCEL_ASYNC ();
  50
  51   /* In the ARM EABI, 64-bit values are aligned to even/odd register
  52      pairs for syscalls.  */
  53   result = INLINE_SYSCALL (pwrite64, 6, fd, CHECK_N (buf, count), count, 0,
  54                            __LONG_LONG_PAIR ((off_t) (offset >> 32),
  55                                              (off_t) (offset & 0xffffffff)));
  56
  57   LIBC_CANCEL_RESET (oldtype);
  58
  59   return result;
  60 }
  61
  62 weak_alias (__libc_pwrite64, __pwrite64)
  63 libc_hidden_weak (__pwrite64)
  64 weak_alias (__libc_pwrite64, pwrite64)