[fpc-pascal] Re: Get all caller adresses of a given function/procedure before executing

[Rainer Stratmann]

Am Thursday 16 August 2012 10:50:25 schrieb Mark Morgan Lloyd:
> Lukasz Sokol wrote:
> >> Please explain.
> >> I do not change the code. I am only searching some pointers.
> >
> > Well, yeah, _you_ don't. What if somebody else could create a program
> > that extracts private (unexported) function pointers from executables and
> > be able to redirect entire code paths. Oh wait. this is called executable
> > infection and great deal of people actually _do_ that.
>
> In fairness, he has said that this is for his own use. And insofar as
> FPC is a general-purpose tool we should acknowledge that "there's more
> than one way to do it".
>
> If anybody is worrying, it should be his professional successors (i.e.
> whoever inherits the value or liability of his code should he fall under
> a tram). Or, for that matter, his customers or associates who by now can
> see everybody telling him that his technique is questionable (this is,
> after all, a public mailing list).

Customers are fully satisfied and know about my fast responce.
You can show them, of course.
It is funny to see all the speculations and kind of FUD here.

> > So you think maintaining your own disassembler is easier, more stable and
> > less maintenance than scanning the source?
>
> He apparently does. And writing as somebody who does disassemblers for
> various CPUs and platforms, I think he's deluded.

Please note that it works perfect.
There can be more of those comments, making a bad mood.
But that does not affect that this is working perfect.
I further don't seen the need to explain everyone who is struggling with a 
tool for that and a tool for that how simple things work.

> I wonder what would happen if somebody tried to run the code on an OS
> that protects executable code from being read?