gcc/ada/vx_crtbegin.inc

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                          V X _ C R T B E G I N                           *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *              Copyright (C) 2017, 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 /* Common body for the various flavors of vx_crtbegin C sources we need
  33    to perform eh frame registration/deregistration in various
  34    circumstances.  #includers should define CDTOR_VISIBILITY. */
  35
  36 #include "tconfig.h"
  37 #include "tsystem.h"
  38 #include "coretypes.h"
  39 #include "tm.h"
  40 #include "unwind-dw2-fde.h"
  41
  42 /* Pick names that the VxWorks muncher will get if involved.
  43    Note: ppc64-vx7 diab uses "_STI_15..." for C++ in kernel mode,
  44    not "_GLOBAL__{I,D}...". ???  */
  45
  46 #ifdef __RTP__
  47 /* 101 is the highest user level priority allowed by VxWorks.  */
  48 #define CTOR_NAME _STI__101____crtbe_register_frame
  49 #define DTOR_NAME _STI__101____crtbe_deregister_frame
  50 #define CTOR_ATTRIBUTE __attribute__((constructor(101)))
  51 #define DTOR_ATTRIBUTE __attribute__((destructor(101)))
  52 #else
  53 #define CTOR_NAME _GLOBAL__I___crtbe_register_frame
  54 #define DTOR_NAME _GLOBAL__D___crtbe_deregister_frame
  55 #define CTOR_ATTRIBUTE __attribute__((unused))
  56 #define DTOR_ATTRIBUTE __attribute__((unused))
  57 #endif
  58
  59 CDTOR_VISIBILITY void CTOR_NAME (void) CTOR_ATTRIBUTE;
  60 CDTOR_VISIBILITY void DTOR_NAME (void) DTOR_ATTRIBUTE;
  61
  62 static const char __EH_FRAME_BEGIN__[]
  63 __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
  64   = { };
  65
  66 CDTOR_VISIBILITY void CTOR_NAME (void)
  67 {
  68   static struct object object;
  69   __register_frame_info (__EH_FRAME_BEGIN__, &object);
  70 }
  71
  72 CDTOR_VISIBILITY void DTOR_NAME (void)
  73 {
  74   __deregister_frame_info (__EH_FRAME_BEGIN__);
  75 }
  76