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2016 Apr 10
3
compler-rt, __aeabi_memcpy () possibly broken (ARM)
Hello,
I recognized that compiler-rt's the implementation of __aeabi_memcpy
simply branches to memcpy.
The implementation of memcpy is not provided. So an externally provided
memcpy () has to be used.
(also applies to memmove, memset, memclr)
On ARM I have seen implementations of memcpy () using floating-point
registers (if compiled with NEON support). The is perfectly
legal, as memcpy () only needs to comply with the Procedure Call
Standard. According to this d0-d7, d16-d31 are scratch registers.
The situation is slightly differen...