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de866aa352
The definitions in _stdint.h has some complications around visibility that _limits.h does not have. Switch to __SIZE_T_MAX to avoid those. This fixes the devel/gperf, devel/glib20 and math/mpfr builds with _FORTIFY_SOURCE enabled to unlock a large fraction of the ports tree to build. Reported by: Shawn Webb (HardenedBSD) Sponsored by: Klara, Inc. Sponsored by: Stormshield
127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/* $NetBSD: ssp.h,v 1.13 2015/09/03 20:43:47 plunky Exp $ */
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/*-
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2006, 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SSP_SSP_H_
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#define _SSP_SSP_H_
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#include <sys/cdefs.h>
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#if !defined(__cplusplus)
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# if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && \
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(__OPTIMIZE__ > 0 || defined(__clang__))
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# if _FORTIFY_SOURCE > 1
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# define __SSP_FORTIFY_LEVEL 2
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# else
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# define __SSP_FORTIFY_LEVEL 1
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# endif
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# else
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# define __SSP_FORTIFY_LEVEL 0
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# endif
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#else
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# define __SSP_FORTIFY_LEVEL 0
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#endif
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#define __ssp_var(type) __CONCAT(__ssp_ ## type, __COUNTER__)
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/* __ssp_real is used by the implementation in libc */
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#if __SSP_FORTIFY_LEVEL == 0
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#define __ssp_real_(fun) fun
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#else
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#define __ssp_real_(fun) __ssp_real_ ## fun
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#endif
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#define __ssp_real(fun) __ssp_real_(fun)
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#define __ssp_inline static __inline __attribute__((__always_inline__))
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#define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1)
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#define __ssp_bos0(ptr) __builtin_object_size(ptr, 0)
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#define __ssp_check(buf, len, bos) \
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if (bos(buf) != (size_t)-1 && (size_t)len > bos(buf)) \
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__chk_fail()
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#define __ssp_redirect_raw_impl(rtype, fun, symbol, args) \
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rtype __ssp_real_(fun) args __RENAME(symbol); \
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__ssp_inline rtype fun args __RENAME(__ssp_protected_ ## fun); \
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__ssp_inline rtype fun args
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#define __ssp_redirect_raw(rtype, fun, symbol, args, call, cond, bos, len) \
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__ssp_redirect_raw_impl(rtype, fun, symbol, args) { \
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if (cond) \
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__ssp_check(__buf, len, bos); \
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return __ssp_real_(fun) call; \
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}
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#define __ssp_redirect(rtype, fun, args, call) \
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__ssp_redirect_raw(rtype, fun, fun, args, call, 1, __ssp_bos, __len)
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#define __ssp_redirect0(rtype, fun, args, call) \
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__ssp_redirect_raw(rtype, fun, fun, args, call, 1, __ssp_bos0, __len)
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#include <machine/_limits.h>
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__ssp_inline int
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__ssp_overlap(const void *leftp, const void *rightp, __size_t sz)
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{
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__uintptr_t left = (__uintptr_t)leftp;
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__uintptr_t right = (__uintptr_t)rightp;
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if (left <= right)
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return (__SIZE_T_MAX - sz < left || right < left + sz);
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return (__SIZE_T_MAX - sz < right || left < right + sz);
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}
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#include <sys/_iovec.h>
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__BEGIN_DECLS
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void __stack_chk_fail(void) __dead2;
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void __chk_fail(void) __dead2;
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__END_DECLS
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__ssp_inline void
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__ssp_check_iovec(const struct iovec *iov, int iovcnt)
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{
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const size_t iovsz = __ssp_bos(iov);
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int i;
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if (iovsz != (size_t)-1 && iovsz / sizeof(*iov) < (size_t)iovcnt)
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__chk_fail();
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for (i = 0; i < iovcnt; i++) {
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if (__ssp_bos(iov[i].iov_base) < iov[i].iov_len)
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__chk_fail();
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}
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}
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#endif /* _SSP_SSP_H_ */
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