Sorry, I just read this: http://www.linux-security.cn/ebooks/ulk3-html/0596005652/understandlk-CHP-9-SECT-3.html And looking at the definition of vm_pgoff, it says: "Offset in mapped file (see Chapter 16). For anonymous pages, it is either zero or equal to vm_start/PAGE_SIZE (see Chapter 17)." anonymous pages referred to vdso/heap and stack. right? but it is neither zero nor vm_start/PAGE_SIZE. a bug in the book? another interesting phenomena to know is that Linux kernel seemed to map all the processes' stack to the same linear address (for convenience of programming?): "cat /proc/*/maps | grep stack" and u can see ONE stack offset value. I thought there is an option to randomized the stack address? not sure. but for heap and vdso it showed less uniformity, but not without as well. interesting!!! -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
