[8833] | 1 | /* Definitions relating to the special __do_global_init function used |
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| 2 | for getting g++ file-scope static objects constructed. This file |
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| 3 | will get included either by libgcc2.c (for systems that don't support |
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| 4 | a .init section) or by crtstuff.c (for those that do). |
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| 5 | Copyright (C) 1991, 1995 Free Software Foundation, Inc. |
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| 6 | Contributed by Ron Guilmette (rfg@segfault.us.com) |
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| 7 | |
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| 8 | This file is part of GNU CC. |
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| 9 | |
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| 10 | GNU CC is free software; you can redistribute it and/or modify |
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| 11 | it under the terms of the GNU General Public License as published by |
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| 12 | the Free Software Foundation; either version 2, or (at your option) |
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| 13 | any later version. |
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| 14 | |
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| 15 | GNU CC is distributed in the hope that it will be useful, |
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | GNU General Public License for more details. |
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| 19 | |
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| 20 | You should have received a copy of the GNU General Public License |
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| 21 | along with GNU CC; see the file COPYING. If not, write to |
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| 22 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 23 | Boston, MA 02111-1307, USA. */ |
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| 24 | |
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| 25 | /* This file contains definitions and declarations of things |
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| 26 | relating to the normal start-up-time invocation of C++ |
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| 27 | file-scope static object constructors. These declarations |
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| 28 | and definitions are used by *both* libgcc2.c and by crtstuff.c. |
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| 29 | |
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| 30 | Note that this file should only be compiled with GCC. |
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| 31 | */ |
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| 32 | |
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| 33 | #ifdef HAVE_ATEXIT |
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| 34 | #ifdef WINNT |
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| 35 | extern int atexit (void (*) (void)); |
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| 36 | #else |
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| 37 | extern void atexit (void (*) (void)); |
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| 38 | #endif |
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| 39 | #define ON_EXIT(FUNC,ARG) atexit ((FUNC)) |
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| 40 | #else |
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| 41 | #ifdef sun |
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| 42 | extern void on_exit (void*, void*); |
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| 43 | #define ON_EXIT(FUNC,ARG) on_exit ((FUNC), (ARG)) |
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| 44 | #endif |
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| 45 | #endif |
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| 46 | |
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| 47 | /* Declare a pointer to void function type. */ |
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| 48 | |
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| 49 | typedef void (*func_ptr) (void); |
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| 50 | |
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| 51 | /* Declare the set of symbols use as begin and end markers for the lists |
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| 52 | of global object constructors and global object destructors. */ |
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| 53 | |
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| 54 | extern func_ptr __CTOR_LIST__[]; |
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| 55 | extern func_ptr __DTOR_LIST__[]; |
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| 56 | |
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| 57 | /* Declare the routine which need to get invoked at program exit time. */ |
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| 58 | |
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| 59 | extern void __do_global_dtors (); |
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| 60 | |
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| 61 | /* Define a macro with the code which needs to be executed at program |
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| 62 | start-up time. This macro is used in two places in crtstuff.c (for |
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| 63 | systems which support a .init section) and in one place in libgcc2.c |
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| 64 | (for those system which do *not* support a .init section). For all |
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| 65 | three places where this code might appear, it must be identical, so |
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| 66 | we define it once here as a macro to avoid various instances getting |
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| 67 | out-of-sync with one another. */ |
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| 68 | |
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| 69 | /* Some systems place the number of pointers |
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| 70 | in the first word of the table. |
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| 71 | On other systems, that word is -1. |
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| 72 | In all cases, the table is null-terminated. |
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| 73 | If the length is not recorded, count up to the null. */ |
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| 74 | |
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| 75 | /* Some systems use a different strategy for finding the ctors. |
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| 76 | For example, svr3. */ |
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| 77 | #ifndef DO_GLOBAL_CTORS_BODY |
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| 78 | #define DO_GLOBAL_CTORS_BODY \ |
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| 79 | do { \ |
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| 80 | unsigned long nptrs = (unsigned long) __CTOR_LIST__[0]; \ |
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| 81 | unsigned i; \ |
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| 82 | if (nptrs == -1) \ |
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| 83 | for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \ |
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| 84 | for (i = nptrs; i >= 1; i--) \ |
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| 85 | __CTOR_LIST__[i] (); \ |
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| 86 | } while (0) |
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| 87 | #endif |
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| 88 | |
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