mmap64 for PA

[Matthew Wilcox]

New file.  Simply enclosing it seems easier than sending a diff.

2001-04-19  Matthew Wilcox  <address@hidden>
        * sysdeps/unix/sysv/linux/hppa/mmap64.c:
        New file to support mmap64.

/* Copyright (C) 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Matthew Wilcox <address@hidden>, 2001.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>

#include <sysdep.h>
#include <sys/syscall.h>
#include <bp-checks.h>

#include "kernel-features.h"

extern void *__unbounded __syscall_mmap2 (void *__unbounded, size_t,
                                          int, int, int, off_t);

__ptr_t
__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset)
{
  if (! (offset & 4095))
    {
      /* This will be always 12, no matter what page size is.  */
      __ptr_t result;
      __ptrvalue (result) =
        (void *__unbounded) INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags,
                                            fd, (off_t) (offset >> 12));
# if __BOUNDED_POINTERS__
      __ptrlow (result) = __ptrvalue (result);
      __ptrhigh (result) = __ptrvalue (result) + len;
# endif
        return result;
    }
  if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len))
    {
      __set_errno (EINVAL);
      return MAP_FAILED;
    }

  return __mmap (addr, len, prot, flags, fd, (off_t) offset);
}

weak_alias (__mmap64, mmap64)