Subversion Repositories openrisc_me

/*

Copyright (c) 2005 Red Hat Incorporated.

All rights reserved.

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

    Redistributions of source code must retain the above copyright

    notice, this list of conditions and the following disclaimer.

    Redistributions in binary form must reproduce the above copyright

    notice, this list of conditions and the following disclaimer in the

    documentation and/or other materials provided with the distribution.

    The name of Red Hat Incorporated may not be used to endorse

    or promote products derived from this software without specific

    prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY

DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

extern void _set_heaptop(void *ptr);

/* Normally these would be in unistd.h but we don't rely on that being

   available during this build.  */

#if defined(__r8c_cpu__) || defined(__m16c_cpu__)

#define PTRDIFF_T int

#else

#define PTRDIFF_T long

#endif

char *

sbrk(PTRDIFF_T adj)

{

  extern char end;

  static char *heap = &end;

  char *rv = heap;

  heap += adj;

  _set_heaptop(heap);

  return rv;

}