gcc/ada/vx_stack_info.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
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   5  *                         V X _ S T A C K _ I N F O                        *
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   7  *                          C Implementation File                           *
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   9  *              Copyright (C) 2007, Free Software Foundation, Inc.          *
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  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
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  28  * GNAT was originally developed  by the GNAT team at  New York University. *
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  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 }