/* libunwind - a platform-independent unwind library

   Copyright (C) 2002-2005 Hewlett-Packard Co

        Contributed by David Mosberger-Tang <davidm@hpl.hp.com>

This file is part of libunwind.

Permission is hereby granted, free of charge, to any person obtaining

a copy of this software and associated documentation files (the

"Software"), to deal in the Software without restriction, including

without limitation the rights to use, copy, modify, merge, publish,

distribute, sublicense, and/or sell copies of the Software, and to

permit persons to whom the Software is furnished to do so, subject to

the following conditions:

The above copyright notice and this permission notice shall be

included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */

#include "libunwind_i.h"

HIDDEN intrmask_t unwi_full_mask;

static const char rcsid[] UNUSED =

  "$Id: " PACKAGE_STRING " --- report bugs to " PACKAGE_BUGREPORT " $";

#if UNW_DEBUG

/* Must not be declared HIDDEN because libunwind.so and

   libunwind-PLATFORM.so will both define their own copies of this

   variable and we want to use only one or the other when both

   libraries are loaded.  */

long unwi_debug_level;

#endif /* UNW_DEBUG */

long unw_page_size;

static void

unw_init_page_size (void)

{

  errno = 0;

  long result = sysconf (_SC_PAGESIZE);

  if (result == -1)

    {

      if (errno != 0)

        {

          print_error ("Failed to get _SC_PAGESIZE: ");

          print_error (strerror(errno));

          print_error ("\n");

        }

        else

          print_error ("Failed to get _SC_PAGESIZE, errno was not set.\n");

      unw_page_size = 4096;

    }

  else

    {

      unw_page_size = result;

    }

}

HIDDEN void

mi_init (void)

{

#if UNW_DEBUG

  const char *str = getenv ("UNW_DEBUG_LEVEL");

  if (str)

    unwi_debug_level = atoi (str);

  if (unwi_debug_level > 0)

    {

      setbuf (stdout, NULL);

      setbuf (stderr, NULL);

    }

#endif

  unw_init_page_size();

  assert(sizeof(struct cursor) <= sizeof(unw_cursor_t));

}