netware-crt0.c revision 302408 
1/* Startup routines for NetWare.
2   Contributed by Jan Beulich (jbeulich@novell.com)
3   Copyright (C) 2004 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22#include <stddef.h>
23#include <stdint.h>
24#include "unwind-dw2-fde.h"
25
26int __init_environment (void *);
27int __deinit_environment (void *);
28
29
30#define SECTION_DECL(name, decl) decl __attribute__((__section__(name)))
31
32SECTION_DECL(".ctors",   void(*const __CTOR_LIST__)(void))
33  = (void(*)(void))(intptr_t)-1;
34SECTION_DECL(".ctors$_", void(*const __CTOR_END__)(void)) = NULL;
35
36SECTION_DECL(".dtors",   void(*const __DTOR_LIST__)(void))
37  = (void(*)(void))(intptr_t)-1;
38SECTION_DECL(".dtors$_", 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. */
42void __register_frame_info (const void *, struct object *)
43  __attribute__((__weak__));
44void *__deregister_frame_info (const void *) __attribute__((__weak__));
45
46SECTION_DECL(".eh_frame", /*const*/ uint32_t __EH_FRAME_BEGIN__[]) = { };
47SECTION_DECL(".eh_frame$_", /*const*/ uint32_t __EH_FRAME_END__[]) = {0};
48
49int
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
65int
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}
81