Mercurial > hg > CbC > CbC_gcc
comparison libgcc/gbl-ctors.h @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 /* Definitions relating to the special __do_global_init function used | |
2 for getting g++ file-scope static objects constructed. This file | |
3 will get included either by libgcc2.c (for systems that don't support | |
4 a .init section) or by crtstuff.c (for those that do). | |
5 Copyright (C) 1991-2017 Free Software Foundation, Inc. | |
6 Contributed by Ron Guilmette (rfg@segfault.us.com) | |
7 | |
8 This file is part of GCC. | |
9 | |
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 | |
12 Software Foundation; either version 3, or (at your option) any later | |
13 version. | |
14 | |
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. | |
19 | |
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/>. */ | |
28 | |
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 | |
37 #ifndef GCC_GBL_CTORS_H | |
38 #define GCC_GBL_CTORS_H | |
39 | |
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 | |
45 of global object constructors and global object destructors. */ | |
46 | |
47 extern func_ptr __CTOR_LIST__[]; | |
48 extern func_ptr __DTOR_LIST__[]; | |
49 | |
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. */ | |
55 | |
56 extern void __do_global_dtors (void); | |
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 | |
66 /* Some systems place the number of pointers | |
67 in the first word of the table. | |
68 On other systems, that word is -1. | |
69 In all cases, the table is null-terminated. | |
70 If the length is not recorded, count up to the null. */ | |
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 { \ | |
77 __SIZE_TYPE__ nptrs = (__SIZE_TYPE__) __CTOR_LIST__[0]; \ | |
78 unsigned i; \ | |
79 if (nptrs == (__SIZE_TYPE__)-1) \ | |
80 for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \ | |
81 for (i = nptrs; i >= 1; i--) \ | |
82 __CTOR_LIST__[i] (); \ | |
83 } while (0) | |
84 #endif | |
85 | |
86 #endif /* GCC_GBL_CTORS_H */ |