Re: [RFC/PATCH RESEND -next 03/21] x86: add kasan hooks fort memcpy/memmove/memset functions

From: Andi Kleen
Date: Wed Jul 09 2014 - 15:34:18 EST

Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> writes:
> +
> +#undef memcpy
> +void *kasan_memset(void *ptr, int val, size_t len);
> +void *kasan_memcpy(void *dst, const void *src, size_t len);
> +void *kasan_memmove(void *dst, const void *src, size_t len);
> +
> +#define memcpy(dst, src, len) kasan_memcpy((dst), (src), (len))
> +#define memset(ptr, val, len) kasan_memset((ptr), (val), (len))
> +#define memmove(dst, src, len) kasan_memmove((dst), (src), (len))

I don't think just define is enough, gcc can call these functions
implicitely too (both with and without __). For example for a struct copy.

You need to have true linker level aliases.


ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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