gcc/ada/vx_stack_info.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                         V X _ S T A C K _ I N F O                        *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *              Copyright (C) 2007-2009  Free Software Foundation, Inc.     *
  10  *                                                                          *
  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  12  * terms of the  GNU General Public License as published  by the Free Soft- *
  13  * ware  Foundation;  either version 3,  or (at your option) any later ver- *
  14  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  15  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  16  * or FITNESS FOR A PARTICULAR PURPOSE.                                     *
  17  *                                                                          *
  18  * As a special exception under Section 7 of GPL version 3, you are granted *
  19  * additional permissions described in the GCC Runtime Library Exception,   *
  20  * version 3.1, as published by the Free Software Foundation.               *
  21  *                                                                          *
  22  * You should have received a copy of the GNU General Public License and    *
  23  * a copy of the GCC Runtime Library Exception along with this program;     *
  24  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    *
  25  * <http://www.gnu.org/licenses/>.                                          *
  26  *                                                                          *
  27  * GNAT was originally developed  by the GNAT team at  New York University. *
  28  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  29  *                                                                          *
  30  ****************************************************************************/
  31
  32 /* VxWorks-specific file to have access to task-specific data and be able
  33    to extract the stack boundaries for stack checking. */
  34
  35 #include <taskLib.h>
  36
  37 typedef struct
  38 {
  39   int  size;
  40   char *base;
  41   char *end;
  42 } stack_info;
  43
  44 /* __gnat_get_stack_info is used by s-stchop.adb only for VxWorks. This
  45    procedure fills the stack information associated to the currently
  46    executing task. */
  47 extern void __gnat_get_stack_info (stack_info *vxworks_stack_info);
  48
  49 void
  50 __gnat_get_stack_info (stack_info *vxworks_stack_info)
  51 {
  52   TASK_DESC descriptor;
  53
  54   /* Ask the VxWorks kernel about stack values */
  55   taskInfoGet (taskIdSelf (), &descriptor);
  56
  57   /* Fill the stack data with the information provided by the kernel */
  58   vxworks_stack_info->size = descriptor.td_stackSize;
  59   vxworks_stack_info->base = descriptor.td_pStackBase;
  60   vxworks_stack_info->end  = descriptor.td_pStackEnd;
  61 }