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1 /* Copyright (C) 2008-2020 Free Software Foundation, Inc.
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2 Contributed by Richard Henderson <rth@redhat.com>.
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3
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4 This file is part of the GNU Transactional Memory Library (libitm).
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5
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6 Libitm is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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14 more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #include "libitm_i.h"
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26
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27 using namespace GTM;
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28
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29 bool abi_dispatch::memmove_overlap_check(void *dst, const void *src,
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30 size_t size, ls_modifier dst_mod, ls_modifier src_mod)
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31 {
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32 if (dst_mod == NONTXNAL || src_mod == NONTXNAL)
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33 {
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34 if (((uintptr_t)dst <= (uintptr_t)src ?
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35 (uintptr_t)dst + size > (uintptr_t)src :
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36 (uintptr_t)src + size > (uintptr_t)dst))
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37 GTM::GTM_fatal("_ITM_memmove overlapping and t/nt is not allowed");
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38 return false;
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39 }
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40 return true;
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41 }
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42
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43 CREATE_DISPATCH_FUNCTIONS(GTM::abi_disp()->, )
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44
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