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