Re: [Qemu-devel] qemu-user: relocating target code weakness

[Mike Frysinger]

On Mon, Jan 24, 2011 at 16:52, Stefano Bonifazi wrote:
>> but that can happen with the app running natively too, so any app not
>> handling MAP_FIXED failures is buggy and not qemu's problem.
>
> How? For what I learned each process executing on a OS with an mmu sees its
> virtual address space, and normally only its code is loaded there (well I am
> learning that the dynamic linker also inject into that space shared library
> code used by the process code, but of course a good dynamic linker would
> prevent clashes!)

how can the ldso possibly prevent clashes ?  it has no idea what
addresses an app will ask for at runtime.

plus, if the kernel is employing ASLR (which isnt uncommon nowadays),
the load addresses could be anywhere.
-mike