1 /*- 2 * Copyright 1996-1998 John D. Polstra. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include <sys/cdefs.h> 29 30 typedef void (*fptr)(void); 31 32 static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 }; 33 static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 }; 34 35 static void do_ctors(void) __unused; 36 static void do_dtors(void) __unused; 37 38 static void 39 do_ctors(void) 40 { 41 fptr *fpp; 42 43 for(fpp = ctor_list + 1; *fpp != 0; ++fpp) 44 ; 45 while(--fpp > ctor_list) 46 (**fpp)(); 47 } 48 49 static void 50 do_dtors(void) 51 { 52 fptr *fpp; 53 54 for(fpp = dtor_list + 1; *fpp != 0; ++fpp) 55 (**fpp)(); 56 } 57 58 __asm__(".section .init,\"ax\",@progbits; call do_ctors; .previous"); 59 __asm__(".section .fini,\"ax\",@progbits; call do_dtors; .previous"); 60