mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-11-24 03:14:08 +08:00
87 lines
3.3 KiB
C
87 lines
3.3 KiB
C
/* 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) 1991-2020 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 */
|