| 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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