1 /* $NetBSD: ssp.h,v 1.3 2008/04/28 20:22:54 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #ifndef _SSP_SSP_H_ 32 #define _SSP_SSP_H_ 33 34 #include <sys/cdefs.h> 35 36 #if !defined(__cplusplus) 37 # if _FORTIFY_SOURCE > 0 && __OPTIMIZE__ > 0 && __GNUC_PREREQ__(4, 1) 38 # if _FORTIFY_SOURCE > 1 39 # define __SSP_FORTIFY_LEVEL 2 40 # else 41 # define __SSP_FORTIFY_LEVEL 1 42 # endif 43 # endif 44 #endif 45 46 #define __ssp_alias_name(fun) __ ## fun ## _alias 47 #ifdef _NAMESPACE_H_ 48 #define __ssp_alias_func(fun, args) ___ ## fun ## _alias args 49 #else 50 #define __ssp_alias_func(fun, args) __ssp_alias_name(fun) args 51 #endif 52 #define __ssp_inline static __inline __attribute__((__always_inline__)) 53 #define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1) 54 #define __ssp_bos0(ptr) __builtin_object_size(ptr, 0) 55 #define __ssp_redirect_raw(rtype, fun, args, call, bos) \ 56 __ssp_inline rtype __ssp_alias_name(fun) args; \ 57 __ssp_inline rtype __ssp_alias_name(fun) args { \ 58 if (bos(__buf) != (size_t)-1 && __len > bos(__buf)) \ 59 __chk_fail(); \ 60 return fun call; \ 61 } 62 63 #define __ssp_redirect(rtype, fun, args, call) \ 64 __ssp_redirect_raw(rtype, fun, args, call, __ssp_bos) 65 #define __ssp_redirect0(rtype, fun, args, call) \ 66 __ssp_redirect_raw(rtype, fun, args, call, __ssp_bos0) 67 68 __BEGIN_DECLS 69 void __stack_chk_fail(void) __attribute__((__noreturn__)); 70 void __chk_fail(void) __attribute__((__noreturn__)); 71 __END_DECLS 72 73 #endif /* _SSP_SSP_H_ */ 74