1 /*- 2 * SPDX-License-Identifier: BSD-1-Clause 3 * 4 * Copyright 2018 Andrew Turner 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 13 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 14 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 15 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 18 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 19 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 */ 23 24 #include <sys/cdefs.h> 25 #include "crt.h" 26 27 typedef void (*crt_func)(void); 28 29 static crt_func __JCR_END__[] __section(".jcr") __used = { 30 (crt_func)0 31 }; 32 33 #ifdef HAVE_CTORS 34 35 /* 36 * On some architectures and toolchains we may need to call the .ctors. 37 * These are called in the reverse order they are in the ELF file. 38 */ 39 static void __do_global_ctors_aux(void) __used; 40 41 static crt_func __CTOR_END__[] __section(".ctors") __used = { 42 (crt_func)0 43 }; 44 static crt_func __DTOR_END__[] __section(".dtors") __used = { 45 (crt_func)0 46 }; 47 48 static void 49 __do_global_ctors_aux(void) 50 { 51 crt_func fn; 52 int n; 53 54 for (n = 1;; n++) { 55 fn = __CTOR_END__[-n]; 56 if (fn == (crt_func)0 || fn == (crt_func)-1) 57 break; 58 fn(); 59 } 60 } 61 62 asm ( 63 ".pushsection .init \n" 64 "\t" INIT_CALL_SEQ(__do_global_ctors_aux) "\n" 65 ".popsection \n" 66 ); 67 #endif 68