Re: OS stopping stack buffer overflow exploits

[Ralf Baechle]

On Sun, Jun 04, 2000 at 10:03:37AM +0200, Ingo Oeser wrote:

> > Hrm... this could cause some problems for applications which use
> > self-modifying code (i.e. trampoline handlers, etc.)
> 
> Could you please show a daily example of any *need* for
> trampolines? I mean code, which could only be implemented
> (efficiently) via trampolines.
> 
> I never saw one generated by GCC and never wrote an explicit one
> by myself. So for what important piece of code we do need it and
> can't code it without trampolines?

void * foo(void)
{
	void bar(void)
	{
	}

	return bar;
}

  Ralf