OSDN Git Service

2008-03-26 Thomas Quinot <quinot@adacore.com>
[pf3gnuchains/gcc-fork.git] / 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, 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 2,  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.  See the GNU General Public License *
17  * for  more details.  You should have  received  a copy of the GNU General *
18  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
19  * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
20  * Boston, MA 02110-1301, USA.                                              *
21  *                                                                          *
22  * As a  special  exception,  if you  link  this file  with other  files to *
23  * produce an executable,  this file does not by itself cause the resulting *
24  * executable to be covered by the GNU General Public License. This except- *
25  * ion does not  however invalidate  any other reasons  why the  executable *
26  * file might be covered by the  GNU Public License.                        *
27  *                                                                          *
28  * GNAT was originally developed  by the GNAT team at  New York University. *
29  * Extensive contributions were provided by Ada Core Technologies Inc.      *
30  *                                                                          *
31  ****************************************************************************/
32
33 /* VxWorks-specific file to have access to task-specific data and be able
34    to extract the stack boundaries for stack checking. */
35
36 #include <taskLib.h>
37
38 typedef struct
39 {
40   int  size;
41   char *base;
42   char *end;
43 } stack_info;
44
45 /* __gnat_get_stack_info is used by s-stchop.adb only for VxWorks. This
46    procedure fills the stack information associated to the currently
47    executing task. */
48 extern void __gnat_get_stack_info (stack_info *vxworks_stack_info);
49
50 void
51 __gnat_get_stack_info (stack_info *vxworks_stack_info)
52 {
53   TASK_DESC descriptor;
54
55   /* Ask the VxWorks kernel about stack values */
56   taskInfoGet (taskIdSelf (), &descriptor);
57
58   /* Fill the stack data with the information provided by the kernel */
59   vxworks_stack_info->size = descriptor.td_stackSize;
60   vxworks_stack_info->base = descriptor.td_pStackBase;
61   vxworks_stack_info->end  = descriptor.td_pStackEnd;
62 }