On 01/09/2012 10:06 AM, Chethan Palakshamurthy wrote: > 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. > 2. Aren't the variables themselves at a fixed offset from GOT (since > GOT is part of data segment)? So, can't the code just access the data > relative to PC with a single indirection? No, because there may be more than one declaration of X: X may be declared in more than one shared object file. So, it may be necessary to fix up references to X to point outside a shared object, even though it contains a definition of X. Andrew.
