gnu/dist/gcc4/gcc/config/i386/netware-crt0.c

   1 /* Startup routines for NetWare.
   2    Contributed by Jan Beulich (jbeulich@novell.com)
   3    Copyright (C) 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 #include <stddef.h>
  23 #include <stdint.h>
  24 #include "unwind-dw2-fde.h"
  25
  26 int __init_environment (void *);
  27 int __deinit_environment (void *);
  28
  29
  30 #define SECTION_DECL(name, decl) decl __attribute__((__section__(name)))
  31
  32 SECTION_DECL(".ctors",   void(*const __CTOR_LIST__)(void))
  33   = (void(*)(void))(intptr_t)-1;
  34 SECTION_DECL(".ctors$_", void(*const __CTOR_END__)(void)) = NULL;
  35
  36 SECTION_DECL(".dtors",   void(*const __DTOR_LIST__)(void))
  37   = (void(*)(void))(intptr_t)-1;
  38 SECTION_DECL(".dtors$_", void(*const __DTOR_END__)(void)) = NULL;
  39
  40 /* No need to use the __[de]register_frame_info_bases functions since
  41    for us the bases are NULL always anyway. */
  42 void __register_frame_info (const void *, struct object *)
  43   __attribute__((__weak__));
  44 void *__deregister_frame_info (const void *) __attribute__((__weak__));
  45
  46 SECTION_DECL(".eh_frame", /*const*/ uint32_t __EH_FRAME_BEGIN__[]) = { };
  47 SECTION_DECL(".eh_frame$_", /*const*/ uint32_t __EH_FRAME_END__[]) = {0};
  48
  49 int
  50 __init_environment (void *unused __attribute__((__unused__)))
  51 {
  52   void (* const * pctor)(void);
  53   static struct object object;
  54
  55   if (__register_frame_info)
  56     __register_frame_info (__EH_FRAME_BEGIN__, &object);
  57
  58   for (pctor = &__CTOR_END__ - 1; pctor > &__CTOR_LIST__; --pctor)
  59     if (*pctor != NULL)
  60       (*pctor)();
  61
  62   return 0;
  63 }
  64
  65 int
  66 __deinit_environment (void *unused __attribute__((__unused__)))
  67 {
  68   /* This should be static to prevent calling the same destructor
  69      twice (just in case where we get here multiple times).  */
  70   static void (* const * pdtor)(void) = &__DTOR_LIST__ + 1;
  71
  72   while (pdtor < &__DTOR_END__)
  73     if (*pdtor++ != NULL)
  74       pdtor[-1] ();
  75
  76   if (__deregister_frame_info)
  77     __deregister_frame_info(__EH_FRAME_BEGIN__);
  78
  79   return 0;
  80 }