Hi, Le Mon, 23 Jun 2008 06:45:47 -0500, "Mayank Kaushik" <mayank.utexas@xxxxxxxxx> a écrit : > Under x86, we have both segmentation and paging. Here's a rough flow: > > Logical Address (<Segment>:<Offset>) ---> (segmentation)---> Linear > address ---> (paging)---> Physical Address. In Linux, all segments have a size of 4 GB (on x86), which means that mostly the convertion between "logical" and "linear" address doesn't do anything. The problem with all these terms "logical", "linear" and "virtual" is that everybody uses them with a slightly different meaning. To make it simple, in Linux you have two different type of addresses: * physical, from 0 to the size of your physical RAM (I left out the peripherals mapped in the physical address space) ; * virtual, from 0 to 2^32 bits on 32 bits architectures. The stack address that you see is a virtual address, as are all the addresses that you can see in /proc/[pid]/maps. Sincerly, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers and embedded Linux development, consulting, training and support. http://free-electrons.com
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