1 /*- 2 * Copyright 1996, 1997, 1998, 2000 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/param.h> 29 30 #define ABI_VENDOR "FreeBSD" 31 #define ABI_SECTION ".note.ABI-tag" 32 #define ABI_NOTETYPE 1 33 34 typedef void (*fptr)(void); 35 36 static fptr ctor_list[1] __attribute__((section(".ctors"))) = { (fptr) -1 }; 37 static fptr dtor_list[1] __attribute__((section(".dtors"))) = { (fptr) -1 }; 38 39 static void 40 do_ctors(void) 41 { 42 fptr *fpp; 43 44 for(fpp = ctor_list + 1; *fpp != 0; ++fpp) 45 ; 46 while(--fpp > ctor_list) 47 (**fpp)(); 48 } 49 50 static void 51 do_dtors(void) 52 { 53 fptr *fpp; 54 55 for(fpp = dtor_list + 1; *fpp != 0; ++fpp) 56 (**fpp)(); 57 } 58 59 /* 60 * With very large programs on some architectures (e.g., the Alpha), 61 * it is possible to get relocation overflows on the limited 62 * displacements of call/bsr instructions. It is particularly likely 63 * for the calls from _init() and _fini(), because they are in 64 * separate sections. Avoid the problem by forcing indirect calls. 65 */ 66 static void (*p_do_ctors)(void) = do_ctors; 67 static void (*p_do_dtors)(void) = do_dtors; 68 69 extern void _init(void) __attribute__((section(".init"))); 70 71 void 72 _init(void) 73 { 74 (*p_do_ctors)(); 75 } 76 77 extern void _fini(void) __attribute__((section(".fini"))); 78 79 void 80 _fini(void) 81 { 82 (*p_do_dtors)(); 83 } 84 85 #include "crtbrand.c" 86