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93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* Stripped down support to run global constructors and destructors on
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embedded PowerPC systems.
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Copyright (C) 1995 Free Software Foundation, Inc.
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Contributed by Michael Meissner (meissner@cygnus.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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/* Declare a pointer to void function type. */
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typedef void (*func_ptr) (void);
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/* Declare the set of symbols use as begin and end markers for the lists
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of global object constructors and global object destructors. */
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extern func_ptr __CTOR_LIST__[];
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extern func_ptr __CTOR_END__ [];
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extern func_ptr __DTOR_LIST__[];
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extern func_ptr __DTOR_END__ [];
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extern void __do_global_ctors (void);
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extern void __do_global_dtors (void);
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extern void __init (), __fini ();
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/* The Solaris linker seems to incorrectly relocate PC relative relocations
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to a different section (ie, calls to __init, __fini), so avoid it by
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using a function pointer. */
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static void (*init_ptr) (void) = __init;
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static void (*fini_ptr) (void) = __fini;
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void (*__atexit)(func_ptr);
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/* Call all global constructors */
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void
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__do_global_ctors (void)
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{
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func_ptr *ptr = &__CTOR_LIST__[0];
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func_ptr *end = &__CTOR_END__[0];
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if (__atexit)
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__atexit (__do_global_dtors);
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/* Call the constructors collected in the .ctors section. */
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for ( ; ptr != end; ptr++)
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if (*ptr)
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(*ptr)();
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/* Call the initialization function in the .init section. */
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(*init_ptr) ();
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}
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/* Call all global destructors */
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void
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__do_global_dtors (void)
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{
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func_ptr *ptr = &__DTOR_END__[0] - 1;
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func_ptr *start = &__DTOR_LIST__[0];
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/* Call the termination function in the .fini section. */
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(*fini_ptr) ();
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/* Call the destructors collected in the .dtors section. Run
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the destructors in reverse order. */
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for ( ; ptr >= start; ptr--)
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if (*ptr)
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(*ptr)();
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}
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