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) 1992-2018, 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 "tconfig.h"
  45 #include "tsystem.h"
  46 /* We don't have libiberty, so use malloc.  */
  47 #define xmalloc(S) malloc (S)
  48 #define xrealloc(V,S) realloc (V,S)
  49 #else
  50 #include "config.h"
  51 #include "system.h"
  52 #endif
  53
  54 #include "raise.h"
  55 #include <fcntl.h>
  56
  57 #ifdef __cplusplus
  58 extern "C" {
  59 #endif
  60
  61 /******************************************/
  62 /* __gnat_initialize (NT-mingw32 Version) */
  63 /******************************************/
  64
  65 #if defined (__MINGW32__)
  66
  67 extern void __gnat_install_SEH_handler (void *);
  68
  69 void
  70 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
  71 {
  72    /* Note that we do not activate this for the compiler itself to avoid a
  73       bootstrap path problem.  Older version of gnatbind will generate a call
  74       to __gnat_initialize() without argument. Therefore we cannot use eh in
  75       this case.  It will be possible to remove the following #ifdef at some
  76       point.  */
  77 #ifdef IN_RTS
  78    /* Install the Structured Exception handler.  */
  79    if (eh)
  80      __gnat_install_SEH_handler (eh);
  81 #endif
  82 }
  83
  84 /******************************************/
  85 /* __gnat_initialize (init_float version) */
  86 /******************************************/
  87
  88 #elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
  89   || defined (__OpenBSD__) || defined (__DragonFly__)
  90
  91 void
  92 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
  93 {
  94 }
  95
  96 /***************************************/
  97 /* __gnat_initialize (VxWorks Version) */
  98 /***************************************/
  99
 100 #elif defined(__vxworks)
 101
 102 void
 103 __gnat_initialize (void *eh)
 104 {
 105 }
 106
 107 #elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
 108
 109 /************************************************/
 110 /* __gnat_initialize (PA-RISC HP-UX 10 Version) */
 111 /************************************************/
 112
 113 extern void __main (void);
 114
 115 void
 116 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
 117 {
 118   __main ();
 119 }
 120
 121 #else
 122
 123 /* For all other versions of GNAT, the initialize routine and handler
 124    installation do nothing */
 125
 126 /***************************************/
 127 /* __gnat_initialize (Default Version) */
 128 /***************************************/
 129
 130 void
 131 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
 132 {
 133 }
 134 #endif
 135
 136 #ifdef __cplusplus
 137 }
 138 #endif