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Diffstat (limited to 'libgcc/gbl-ctors.h')
| -rw-r--r-- | libgcc/gbl-ctors.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libgcc/gbl-ctors.h b/libgcc/gbl-ctors.h new file mode 100644 index 00000000000..ac4faae1292 --- /dev/null +++ b/libgcc/gbl-ctors.h @@ -0,0 +1,87 @@ +/* Definitions relating to the special __do_global_init function used + for getting g++ file-scope static objects constructed. This file + will get included either by libgcc2.c (for systems that don't support + a .init section) or by crtstuff.c (for those that do). + Copyright (C) 1991, 1995, 1996, 1998, 1999, 2000, 2003, 2009 + Free Software Foundation, Inc. + Contributed by Ron Guilmette (rfg@segfault.us.com) + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +/* This file contains definitions and declarations of things + relating to the normal start-up-time invocation of C++ + file-scope static object constructors. These declarations + and definitions are used by *both* libgcc2.c and by crtstuff.c. + + Note that this file should only be compiled with GCC. +*/ + +#ifndef GCC_GBL_CTORS_H +#define GCC_GBL_CTORS_H + +/* Declare a pointer to void function type. */ + +typedef void (*func_ptr) (void); + +/* Declare the set of symbols use as begin and end markers for the lists + of global object constructors and global object destructors. */ + +extern func_ptr __CTOR_LIST__[]; +extern func_ptr __DTOR_LIST__[]; + +/* Declare the routine which needs to get invoked at program start time. */ + +extern void __do_global_ctors (void); + +/* Declare the routine which needs to get invoked at program exit time. */ + +extern void __do_global_dtors (void); + +/* Define a macro with the code which needs to be executed at program + start-up time. This macro is used in two places in crtstuff.c (for + systems which support a .init section) and in one place in libgcc2.c + (for those system which do *not* support a .init section). For all + three places where this code might appear, it must be identical, so + we define it once here as a macro to avoid various instances getting + out-of-sync with one another. */ + +/* Some systems place the number of pointers + in the first word of the table. + On other systems, that word is -1. + In all cases, the table is null-terminated. + If the length is not recorded, count up to the null. */ + +/* Some systems use a different strategy for finding the ctors. + For example, svr3. */ +#ifndef DO_GLOBAL_CTORS_BODY +#define DO_GLOBAL_CTORS_BODY \ +do { \ + __SIZE_TYPE__ nptrs = (__SIZE_TYPE__) __CTOR_LIST__[0]; \ + unsigned i; \ + if (nptrs == (__SIZE_TYPE__)-1) \ + for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \ + for (i = nptrs; i >= 1; i--) \ + __CTOR_LIST__[i] (); \ +} while (0) +#endif + +#endif /* GCC_GBL_CTORS_H */ |
