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Re: Tests requiring MD hooks
On Mon, Jul 11, 2011 at 12:34:03 +0100, jean-Yves Migeon wrote:
> I can't do that simply through rtld, as I need to memcpy(2) the payload
> and therefore have access to the beginning (which is not necessarily
> trivial given certain architectures), and the end (never found a way to
> properly label those without using assembly routines).
Come to think of it, if all you need is a trivial function, don't use
compiler to produce one, just hardcode it in an array:
unsigned char code =
0xde, 0xad, 0xbe, 0xaf, ...
/* ... */
That way you don't depend on compiler to produce self-contained code.
Since that trivial function is only a couple of instructions, and is
not likely to ever change, you just need to manually assemble it once.
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