gcc/ada/initialize.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                           I N I T I A L I Z E                            *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *          Copyright (C) 1992-2019, 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 /*  This unit provides default implementation for __gnat_initialize ()
  33     which is called before the elaboration of the partition. It is provided
  34     in a separate file/object so that users can replace it easily.
  35     The default implementation should be null on most targets.  */
  36
  37 /* The following include is here to meet the published VxWorks requirement
  38    that the __vxworks header appear before any other include.  */
  39 #ifdef __vxworks
  40 #include "vxWorks.h"
  41 #endif
  42
  43 #ifdef IN_RTS
  44 #include "runtime.h"
  45 /* We don't have libiberty, so use malloc.  */
  46 #define xmalloc(S) malloc (S)
  47 #define xrealloc(V,S) realloc (V,S)
  48 #else
  49 #include "config.h"
  50 #include "system.h"
  51 #endif
  52
  53 #include "raise.h"
  54 #include <fcntl.h>
  55
  56 #ifdef __cplusplus
  57 extern "C" {
  58 #endif
  59
  60 /******************************************/
  61 /* __gnat_initialize (NT-mingw32 Version) */
  62 /******************************************/
  63
  64 #if defined (__MINGW32__)
  65
  66 extern void __gnat_install_SEH_handler (void *);
  67
  68 void
  69 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
  70 {
  71    /* Note that we do not activate this for the compiler itself to avoid a
  72       bootstrap path problem.  Older version of gnatbind will generate a call
  73       to __gnat_initialize() without argument. Therefore we cannot use eh in
  74       this case.  It will be possible to remove the following #ifdef at some
  75       point.  */
  76 #ifdef IN_RTS
  77    /* Install the Structured Exception handler.  */
  78    if (eh)
  79      __gnat_install_SEH_handler (eh);
  80 #endif
  81 }
  82
  83 /******************************************/
  84 /* __gnat_initialize (init_float version) */
  85 /******************************************/
  86
  87 #elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
  88   || defined (__OpenBSD__) || defined (__DragonFly__)
  89
  90 void
  91 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
  92 {
  93 }
  94
  95 /***************************************/
  96 /* __gnat_initialize (VxWorks Version) */
  97 /***************************************/
  98
  99 #elif defined(__vxworks)
 100
 101 void
 102 __gnat_initialize (void *eh)
 103 {
 104 }
 105
 106 #elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
 107
 108 /************************************************/
 109 /* __gnat_initialize (PA-RISC HP-UX 10 Version) */
 110 /************************************************/
 111
 112 extern void __main (void);
 113
 114 void
 115 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
 116 {
 117   __main ();
 118 }
 119
 120 #else
 121
 122 /* For all other versions of GNAT, the initialize routine and handler
 123    installation do nothing */
 124
 125 /***************************************/
 126 /* __gnat_initialize (Default Version) */
 127 /***************************************/
 128
 129 void
 130 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
 131 {
 132 }
 133 #endif
 134
 135 #ifdef __cplusplus
 136 }
 137 #endif