1 | /* |
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2 | * Copyright (c) 2014 ARM Ltd |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. The name of the company may not be used to endorse or promote |
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14 | * products derived from this software without specific prior written |
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15 | * permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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21 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
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22 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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23 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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26 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <stddef.h> |
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30 | #include <_ansi.h> |
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31 | |
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32 | /* According to the Run-time ABI for the ARM Architecture. This |
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33 | function is allowed to corrupt only the integer core register |
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34 | permitted to be corrupted by the [AAPCS] (r0-r3, ip, lr, and |
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35 | CPSR). |
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36 | |
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37 | The FP registers are used in memcpy for target __ARM_ARCH_7A. |
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38 | Therefore, we can't just simply use alias to support the function |
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39 | aeabi_memcpy for target __ARM_ARCH_7A. Instead, we choose the |
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40 | previous versions of memcpy to suppport it as an alternative. */ |
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41 | |
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42 | /* NOTE: This ifdef MUST match the one in aeabi_memcpy-armv7a.S. */ |
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43 | #if defined (__ARM_ARCH_7A__) && defined (__ARM_FEATURE_UNALIGNED) && \ |
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44 | (defined (__ARM_NEON__) || !defined (__SOFTFP__)) |
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45 | |
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46 | /* Defined in aeabi_memcpy-armv7a.S. */ |
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47 | |
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48 | #else |
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49 | /* Support the alias for the __aeabi_memcpy which may |
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50 | assume memory alignment. */ |
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51 | void __aeabi_memcpy4 (void *dest, const void *source, size_t n) |
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52 | _ATTRIBUTE ((alias ("__aeabi_memcpy"))); |
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53 | |
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54 | void __aeabi_memcpy8 (void *dest, const void *source, size_t n) |
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55 | _ATTRIBUTE ((alias ("__aeabi_memcpy"))); |
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56 | |
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57 | /* Support the routine __aeabi_memcpy. Can't alias to memcpy |
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58 | because it's not defined in the same translation unit. */ |
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59 | void __aeabi_memcpy (void *dest, const void *source, size_t n) |
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60 | { |
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61 | extern void memcpy (void *dest, const void *source, size_t n); |
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62 | memcpy (dest, source, n); |
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63 | } |
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64 | #endif |
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