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014cfee8 RS |
1 | /* Definitions relating to the special __do_global_init function used |
2 | for getting g++ file-scope static objects constructed. This file | |
5b879759 | 3 | will get included either by libgcc2.c (for systems that don't support |
014cfee8 | 4 | a .init section) or by crtstuff.c (for those that do). |
7adcbafe | 5 | Copyright (C) 1991-2022 Free Software Foundation, Inc. |
3709124d | 6 | Contributed by Ron Guilmette (rfg@segfault.us.com) |
014cfee8 | 7 | |
1322177d | 8 | This file is part of GCC. |
014cfee8 | 9 | |
1322177d LB |
10 | GCC is free software; you can redistribute it and/or modify it under |
11 | the terms of the GNU General Public License as published by the Free | |
748086b7 | 12 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 13 | version. |
014cfee8 | 14 | |
1322177d LB |
15 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
014cfee8 | 19 | |
748086b7 JJ |
20 | Under Section 7 of GPL version 3, you are granted additional |
21 | permissions described in the GCC Runtime Library Exception, version | |
22 | 3.1, as published by the Free Software Foundation. | |
23 | ||
24 | You should have received a copy of the GNU General Public License and | |
25 | a copy of the GCC Runtime Library Exception along with this program; | |
26 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
27 | <http://www.gnu.org/licenses/>. */ | |
77c915d8 | 28 | |
014cfee8 RS |
29 | /* This file contains definitions and declarations of things |
30 | relating to the normal start-up-time invocation of C++ | |
31 | file-scope static object constructors. These declarations | |
32 | and definitions are used by *both* libgcc2.c and by crtstuff.c. | |
33 | ||
34 | Note that this file should only be compiled with GCC. | |
35 | */ | |
36 | ||
69952c1d BRF |
37 | #ifndef GCC_GBL_CTORS_H |
38 | #define GCC_GBL_CTORS_H | |
39 | ||
014cfee8 RS |
40 | /* Declare a pointer to void function type. */ |
41 | ||
42 | typedef void (*func_ptr) (void); | |
43 | ||
44 | /* Declare the set of symbols use as begin and end markers for the lists | |
c415fa05 | 45 | of global object constructors and global object destructors. */ |
014cfee8 RS |
46 | |
47 | extern func_ptr __CTOR_LIST__[]; | |
48 | extern func_ptr __DTOR_LIST__[]; | |
49 | ||
63bc1d05 KG |
50 | /* Declare the routine which needs to get invoked at program start time. */ |
51 | ||
52 | extern void __do_global_ctors (void); | |
53 | ||
54 | /* Declare the routine which needs to get invoked at program exit time. */ | |
014cfee8 | 55 | |
a24da858 | 56 | extern void __do_global_dtors (void); |
014cfee8 RS |
57 | |
58 | /* Define a macro with the code which needs to be executed at program | |
59 | start-up time. This macro is used in two places in crtstuff.c (for | |
60 | systems which support a .init section) and in one place in libgcc2.c | |
61 | (for those system which do *not* support a .init section). For all | |
62 | three places where this code might appear, it must be identical, so | |
63 | we define it once here as a macro to avoid various instances getting | |
64 | out-of-sync with one another. */ | |
65 | ||
e5952538 JM |
66 | /* Some systems place the number of pointers |
67 | in the first word of the table. | |
68 | On other systems, that word is -1. | |
014cfee8 | 69 | In all cases, the table is null-terminated. |
e5952538 | 70 | If the length is not recorded, count up to the null. */ |
014cfee8 RS |
71 | |
72 | /* Some systems use a different strategy for finding the ctors. | |
73 | For example, svr3. */ | |
74 | #ifndef DO_GLOBAL_CTORS_BODY | |
75 | #define DO_GLOBAL_CTORS_BODY \ | |
76 | do { \ | |
59a1171f | 77 | __SIZE_TYPE__ nptrs = (__SIZE_TYPE__) __CTOR_LIST__[0]; \ |
e5952538 | 78 | unsigned i; \ |
59a1171f | 79 | if (nptrs == (__SIZE_TYPE__)-1) \ |
e5952538 JM |
80 | for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \ |
81 | for (i = nptrs; i >= 1; i--) \ | |
82 | __CTOR_LIST__[i] (); \ | |
589005ff | 83 | } while (0) |
014cfee8 RS |
84 | #endif |
85 | ||
69952c1d | 86 | #endif /* GCC_GBL_CTORS_H */ |