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
37typedef 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. */
47extern void __gnat_get_stack_info (stack_info *vxworks_stack_info);
48
49void
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}
62