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- /*-
- * SPDX-License-Identifier: BSD-1-Clause
- *
- * Copyright 2018 Andrew Turner
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <sys/param.h>
- #include "crt.h"
- typedef void (*crt_func)(void);
- extern void *__dso_handle __hidden;
- #ifndef SHARED
- void *__dso_handle = 0;
- #else
- void *__dso_handle = &__dso_handle;
- void __cxa_finalize(void *) __weak_symbol;
- /*
- * Call __cxa_finalize with the dso handle in shared objects.
- * When we have ctors/dtors call from the dtor handler before calling
- * any dtors, otherwise use a destructor.
- */
- #ifndef HAVE_CTORS
- __attribute__((destructor))
- #endif
- static void
- run_cxa_finalize(void)
- {
- if (__cxa_finalize != NULL)
- __cxa_finalize(__dso_handle);
- }
- #endif
- /*
- * On some architectures and toolchains we may need to call the .dtors.
- * These are called in the order they are in the ELF file.
- */
- #ifdef HAVE_CTORS
- static void __do_global_dtors_aux(void) __used;
- static crt_func __CTOR_LIST__[] __section(".ctors") __used = {
- (crt_func)-1
- };
- static crt_func __DTOR_LIST__[] __section(".dtors") __used = {
- (crt_func)-1
- };
- static void
- __do_global_dtors_aux(void)
- {
- crt_func fn;
- int n;
- #ifdef SHARED
- run_cxa_finalize();
- #endif
- for (n = 1;; n++) {
- fn = __DTOR_LIST__[n];
- if (fn == (crt_func)0 || fn == (crt_func)-1)
- break;
- fn();
- }
- }
- asm (
- ".pushsection .fini \n"
- "\t" INIT_CALL_SEQ(__do_global_dtors_aux) "\n"
- ".popsection \n"
- );
- #endif
- /*
- * Handler for gcj. These provide a _Jv_RegisterClasses function and fill
- * out the .jcr section. We just need to call this function with a pointer
- * to the appropriate section.
- */
- extern void _Jv_RegisterClasses(void *) __weak_symbol;
- static void register_classes(void) __used;
- static crt_func __JCR_LIST__[] __section(".jcr") __used = { };
- #ifndef CTORS_CONSTRUCTORS
- __attribute__((constructor))
- #endif
- static void
- register_classes(void)
- {
- if (_Jv_RegisterClasses != NULL && __JCR_LIST__[0] != 0)
- _Jv_RegisterClasses(__JCR_LIST__);
- }
- /*
- * We can't use constructors when they use the .ctors section as they may be
- * placed before __CTOR_LIST__.
- */
- #ifdef CTORS_CONSTRUCTORS
- asm (
- ".pushsection .init \n"
- "\t" INIT_CALL_SEQ(register_classes) "\n"
- ".popsection \n"
- );
- #endif
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