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 * $Id: crtbegin.c,v 1.3 1996/04/12 02:24:35 jdp Exp $ 26 */ 27 28 typedef void (*fptr)(void); 29 30 static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 }; 31 static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 }; 32 33 static void 34 do_ctors(void) 35 { 36 fptr *fpp; 37 38 for(fpp = ctor_list + 1; *fpp != 0; ++fpp) 39 (**fpp)(); 40 } 41 42 static void 43 do_dtors(void) 44 { 45 fptr *fpp; 46 47 for(fpp = dtor_list + 1; *fpp != 0; ++fpp) 48 ; 49 while(--fpp > dtor_list) 50 (**fpp)(); 51 } 52 53 static void 54 function_skeleton(void) 55 { 56 __asm__(".section .init,\"ax\",@progbits"); 57 do_ctors(); 58 __asm__(".section .fini,\"ax\",@progbits"); 59 do_dtors(); 60 __asm__(".text"); 61 } 62