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add a macro to check overlapping pointers

This commit is contained in:
christos 2015-05-09 15:41:47 +00:00
parent bcec7bd07a
commit adfc40c594
1 changed files with 4 additions and 1 deletions
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5
include/ssp/ssp.h
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@ -1,4 +1,4 @@
/* $NetBSD: ssp.h,v 1.10 2012/08/08 20:23:32 joerg Exp $ */
/* $NetBSD: ssp.h,v 1.11 2015/05/09 15:41:47 christos Exp $ */
/*-
* Copyright (c) 2006, 2011 The NetBSD Foundation, Inc.
@ -77,6 +77,9 @@ __ssp_inline rtype fun args { \
#define __ssp_redirect0(rtype, fun, args, call) \
__ssp_redirect_raw(rtype, fun, fun, args, call, __ssp_bos0)
#define __ssp_overlap(a, b, l) \
(((a) <= (b) && (b) <= (a) + (l)) || ((b) <= (a) && (a) <= (b) + (l)))
__BEGIN_DECLS
void __stack_chk_fail(void) __dead;
void __chk_fail(void) __dead;