Hi!
> > Not sure this helps... If I only randomize _end_ of heap, it still
> > works. If I try to randomize beggining of heap, too, it will not even
> > start recent binaries :-(.
>
> I don't uderstand this, sorry. Ehen the mapping for the new process is
> being established during loading of the binary, the beginning and the end
> of the heap are the same ...
Okay, I was assuming this is mapping heap..
/* Calling set_brk effectively mmaps the pages that we need
* for the bss and break sections. We must do this before
* mapping in the interpreter, to make sure it doesn't wind
* up getting placed where the bss needs to go.
*/
retval = set_brk(elf_bss, elf_brk);
If I add
+ elf_brk += random;
before set_brk() (and revert the brk randomization), it works,
including columns.
If I add
+// elf_bss += random;
before set_brk(), I break everything.
Pavel
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