From mboxrd@z Thu Jan  1 00:00:00 1970
From: andi@firstfloor.org (Andi Kleen)
Date: Wed, 09 Jul 2014 12:31:58 -0700
Subject: [RFC/PATCH RESEND -next 03/21] x86: add kasan hooks fort
 memcpy/memmove/memset functions
In-Reply-To: <1404905415-9046-4-git-send-email-a.ryabinin@samsung.com> (Andrey
 Ryabinin's message of "Wed, 09 Jul 2014 15:29:57 +0400")
References: <1404905415-9046-1-git-send-email-a.ryabinin@samsung.com>
 <1404905415-9046-4-git-send-email-a.ryabinin@samsung.com>
Message-ID: <87ion6nxap.fsf@tassilo.jf.intel.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Andrey Ryabinin <a.ryabinin@samsung.com> 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. 

-Andi

-- 
ak at linux.intel.com -- Speaking for myself only