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Date: Fri, 7 May 2010 23:21:00 +0530
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Subject: Link time manipulation of kernel symbols like read/write
From: "Leonidas ." <leonidas137@gmail.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
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Hi folks,

Is it possible to wrap module entry points like open/close during the
module compilation?
By wrapping, I mean interposing using linker --wrap option. This is
very much possible in
user space and is commonly used to interpose library functions.

E.g.

void *
__wrap_malloc (int c)
{
  printf ("malloc called with %ld\n", c);
  return __real_malloc (c);
}

int main()
{
    malloc(17);
    return 0;
}

Above works expected, can we wrap kmalloc this way?

-Leo.