On 08/14/2007 04:41 PM, Jiri Kosina wrote: > (added Arjan to CC, as he has been working on the kernel part of the > randomization previously) > > On Tue, 14 Aug 2007, Jakub Jelinek wrote: > >> If I'm reading the above hunk correctly, this means we will randomize >> all PIEs and even all dynamic linkers invoked as executables on i?86 and >> x86_64, and on the rest of arches we won't randomize at all, instead >> load ET_DYN objects at ELF_ET_DYN_BASE address. But I don't see anything >> i?86/x86_64 specific on this. > > Hi Jakub, > > actually, it is currently arch-specific, and that's because of different > memory layouts on different archs. > > It turned out recently that PIE-compiled binaries on x86_64, that perform > larger amount of brk-allocations (for example bash) will not work (but > they will work on ?86). This is because currently on ?86 the memory layout > is as follows:
But your patch is enabling randomization for x86_64, because CONFIG_X86 includes both 32 and 64 bit archs. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
