Thanks Ian, Andrew. - chethan On Tue, Jan 10, 2012 at 10:31 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > > Chethan Palakshamurthy <pchethan@xxxxxxxxx> writes: > > >>> 1. Does the dynamic linker map the physical pages for .data segments > >>> such that GOT is at a fixed offset from code in logical address space? > >>> is this true? > >> > >>Yes, it has to do this or it wouldn't be possible to find the GOT. > > > > So, this method of paging is what makes it possible to share code > > pages across processes? Several sources online(/books) mention that > > PIC is the one which make code sharing across processes possible. > > I would not say that it's the method of paging that makes that > possible. That is merely a detail in how the GOT is implemented. > > The GOT makes sharing possible because it separates the final address of > the variable from the code. Thus the code can be shared even though the > address of the variable will be different in different processes. > > Ian
