On 5/11/07, Andrew Morton <[email protected]> wrote:
erm, I was being funny. If you randomize a binary it won't run any more.
cp /dev/random /bin/login. Oh well.
My point is, we're not being told what is being randomized here. Is it the
virtual starting address of the main executable mmap? Of the shared
libraries also? Is it the stack location? What?
PIE = Position Independent Executable, that's how I named them.
These are not regular executables, they are basically DSOs but usually
compiled with -fpie/-fPIE instead of -fpic/-fPIC and linked with -pie
instead of -shared to allow the compiled and linker perform more
optimizations.
See section 5 in
http://people.redhat.com/drepper/nonselsec.pdf
Jan unfortunately Ingo's document which doesn't really explain it.
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