On Wed, 24 Jan 2007, [GB2312] ÎâêØ wrote:
I am working on gcc 4.0.0. I want to use gcc to intercept each call to
read, and taint the data readed in. For example:
transform
read(fd, buf, size)
to
read(fd, buf, size)
if(is_socket(fd))
taint(buf, size)
So, what is the best suitable level to do this modification in gcc? My
own thought is in finish_function, before calling c_genericize,as I
discovered that in c front-end, there's no GENERIC tree... In
c_genericize, it directly calls gimplify_function_tree.
Are you sure you want to do this in GCC? You might find it easier to use a
dynamic binary instrumentation framework such as Valgrind or Pin to do this
kind of thing.
Nick
