Hi all.. On Tue, May 20, 2008 at 8:03 PM, srinivasa ds <srinivasa.ds@xxxxxxxxx> wrote: > If you use -pie(position independent executable) option of gcc, load > address will be randomly picked. Hence doesn't remain 0x8048000. thanks for reminding me about PIE...i forgot that term...grrrr > Address space randomization is also known as exec-shield in linux, And this > is responsible for mapping userspace stack and heap at different address for > each execution of same executable. nope, exec shield, to the best I know, did the thing like making stack non executable or effectively applying NX bit if it's supported by your processor. Address space randomization is something separate from exec-shield... > You can even randomize the loading address of the executable using -pie flag > in GCC. AFAIK, true. However, the loader must also regards this feature...if not, you'll be ended in same start address. So it's a collaboration of compiler, linker and loader ...CMIIW people regards, Mulyadi. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
