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/* $OpenBSD: crtbegin.c,v 1.20 2015/11/10 04:14:03 guenther Exp $ */ |
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/* $NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd Exp $ */ |
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/* |
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* Copyright (c) 1993 Paul Kranenburg |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by Paul Kranenburg. |
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* 4. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* Run-time module for GNU C++ compiled shared libraries. |
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* |
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* The linker constructs the following arrays of pointers to global |
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* constructors and destructors. The first element contains the |
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* number of pointers in each. |
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* The tables are also null-terminated. |
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*/ |
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#include <stdlib.h> |
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#include "md_init.h" |
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#include "os-note-elf.h" |
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#include "extern.h" |
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struct dwarf2_eh_object { |
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void *space[8]; |
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}; |
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void __register_frame_info(const void *, struct dwarf2_eh_object *) |
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__attribute__((weak)); |
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void __register_frame_info(const void *begin, struct dwarf2_eh_object *ob) |
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{ |
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} |
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static const char __EH_FRAME_BEGIN__[] |
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__attribute__((section(".eh_frame"), aligned(4))) = { }; |
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/* |
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* java class registration hooks |
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*/ |
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static void *__JCR_LIST__[] |
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__attribute__((section(".jcr"), aligned(sizeof(void*)))) = { }; |
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extern void _Jv_RegisterClasses (void *) |
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__attribute__((weak)); |
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/* |
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* Include support for the __cxa_atexit/__cxa_finalize C++ abi for |
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* gcc > 2.x. __dso_handle is NULL in the main program and a unique |
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* value for each C++ shared library. For more info on this API, see: |
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* |
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* http://www.codesourcery.com/cxx-abi/abi.html#dso-dtor |
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*/ |
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void *__dso_handle = NULL; |
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__asm(".hidden __dso_handle"); |
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long __guard_local __dso_hidden __attribute__((section(".openbsd.randomdata"))); |
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static const init_f __CTOR_LIST__[1] |
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__attribute__((section(".ctors"))) = { (void *)-1 }; /* XXX */ |
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static const init_f __DTOR_LIST__[1] |
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__attribute__((section(".dtors"))) = { (void *)-1 }; /* XXX */ |
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static void __dtors(void) __used; |
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static void __ctors(void) __used; |
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static void |
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__ctors() |
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{ |
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unsigned long i = (unsigned long) __CTOR_LIST__[0]; |
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const init_f *p; |
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if (i == -1) { |
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for (i = 1; __CTOR_LIST__[i] != NULL; i++) |
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; |
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i--; |
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} |
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p = __CTOR_LIST__ + i; |
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while (i--) |
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(**p--)(); |
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} |
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static void |
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__dtors() |
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{ |
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const init_f *p = __DTOR_LIST__ + 1; |
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while (*p) |
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(**p++)(); |
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} |
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void __init(void); |
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void __fini(void); |
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static void __do_init(void) __used; |
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static void __do_fini(void) __used; |
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MD_SECTION_PROLOGUE(".init", __init); |
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MD_SECTION_PROLOGUE(".fini", __fini); |
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MD_SECT_CALL_FUNC(".init", __do_init); |
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MD_SECT_CALL_FUNC(".fini", __do_fini); |
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void |
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__do_init() |
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{ |
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static int initialized = 0; |
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static struct dwarf2_eh_object object; |
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/* |
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* Call global constructors. |
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* Arrange to call global destructors at exit. |
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*/ |
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if (!initialized) { |
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initialized = 1; |
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__register_frame_info(__EH_FRAME_BEGIN__, &object); |
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if (__JCR_LIST__[0] && _Jv_RegisterClasses) |
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_Jv_RegisterClasses(__JCR_LIST__); |
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(__ctors)(); |
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atexit(__fini); |
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} |
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} |
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void |
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__do_fini() |
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{ |
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static int finalized = 0; |
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if (!finalized) { |
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finalized = 1; |
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/* |
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* Call global destructors. |
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*/ |
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(__dtors)(); |
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} |
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} |
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