1 /* $NetBSD: ssp.h,v 1.2 2007/06/03 17:41:19 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 #ifndef _SSP_SSP_H_ 39 #define _SSP_SSP_H_ 40 41 #include <sys/cdefs.h> 42 43 #if !defined(__cplusplus) 44 # if _FORTIFY_SOURCE > 0 && __OPTIMIZE__ > 0 && __GNUC_PREREQ__(4, 1) 45 # if _FORTIFY_SOURCE > 1 46 # define __SSP_FORTIFY_LEVEL 2 47 # else 48 # define __SSP_FORTIFY_LEVEL 1 49 # endif 50 # endif 51 #endif 52 53 #define __ssp_alias_name(fun) __ ## fun ## _alias 54 #ifdef _NAMESPACE_H_ 55 #define __ssp_alias_func(fun, args) ___ ## fun ## _alias args 56 #else 57 #define __ssp_alias_func(fun, args) __ssp_alias_name(fun) args 58 #endif 59 #define __ssp_inline static __inline __attribute__((__always_inline__)) 60 #define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1) 61 #define __ssp_bos0(ptr) __builtin_object_size(ptr, 0) 62 #define __ssp_redirect_raw(rtype, fun, args, call, bos) \ 63 __ssp_inline rtype __ssp_alias_name(fun) args; \ 64 __ssp_inline rtype __ssp_alias_name(fun) args { \ 65 if (bos(__buf) != (size_t)-1 && __len > bos(__buf)) \ 66 __chk_fail(); \ 67 return fun call; \ 68 } 69 70 #define __ssp_redirect(rtype, fun, args, call) \ 71 __ssp_redirect_raw(rtype, fun, args, call, __ssp_bos) 72 #define __ssp_redirect0(rtype, fun, args, call) \ 73 __ssp_redirect_raw(rtype, fun, args, call, __ssp_bos0) 74 75 __BEGIN_DECLS 76 void __stack_chk_fail(void) __attribute__((__noreturn__)); 77 void __chk_fail(void) __attribute__((__noreturn__)); 78 __END_DECLS 79 80 #endif /* _SSP_SSP_H_ */ 81