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1 /* EABI unaligned read/write functions.
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2
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3 Copyright (C) 2005, 2009 Free Software Foundation, Inc.
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4 Contributed by CodeSourcery, LLC.
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5
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6 This file 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 the
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8 Free Software Foundation; either version 3, or (at your option) any
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9 later version.
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10
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11 This file is distributed in the hope that it will be useful, but
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12 WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 General Public License for 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 int __aeabi_uread4 (void *);
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26 int __aeabi_uwrite4 (int, void *);
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27 long long __aeabi_uread8 (void *);
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28 long long __aeabi_uwrite8 (long long, void *);
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29
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30 struct __attribute__((packed)) u4 { int data; };
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31 struct __attribute__((packed)) u8 { long long data; };
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32
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33 int
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34 __aeabi_uread4 (void *ptr)
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35 {
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36 return ((struct u4 *) ptr)->data;
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37 }
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38
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39 int
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40 __aeabi_uwrite4 (int data, void *ptr)
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41 {
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42 ((struct u4 *) ptr)->data = data;
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43 return data;
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44 }
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45
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46 long long
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47 __aeabi_uread8 (void *ptr)
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48 {
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49 return ((struct u8 *) ptr)->data;
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50 }
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51
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52 long long
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53 __aeabi_uwrite8 (long long data, void *ptr)
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54 {
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55 ((struct u8 *) ptr)->data = data;
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56 return data;
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57 }
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