include/stackinfo.h

   1 /* Details about the machine's stack: wrapper header.
   2    Copyright (C) 2014-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #ifndef _INCLUDE_STACKINFO_H
  20 #define _INCLUDE_STACKINFO_H    1
  21
  22 /* A sysdeps/.../stackinfo.h file defines details for the CPU.
  23    It is obliged to define either _STACK_GROWS_DOWN or _STACK_GROWS_UP.  */
  24 #include_next <stackinfo.h>
  25
  26 #if defined _STACK_GROWS_DOWN && _STACK_GROWS_DOWN
  27 # ifdef _STACK_GROWS_UP
  28 #  error "stackinfo.h should not define both!"
  29 # else
  30 #  define _STACK_GROWS_UP       0
  31 # endif
  32 #elif defined _STACK_GROWS_UP && _STACK_GROWS_UP
  33 # ifdef _STACK_GROWS_DOWN
  34 #  error "stackinfo.h should not define both!"
  35 # else
  36 #  define _STACK_GROWS_DOWN     0
  37 # endif
  38 #else
  39 # error "stackinfo.h must define _STACK_GROWS_UP or _STACK_GROWS_DOWN!"
  40 #endif
  41
  42 #endif  /* include/stackinfo.h */