why is text address constant with full randomization?

From	慕冬亮 <mudongliangabcd@gmail.com>
Newsgroups	linux.kernel
Subject	why is text address constant with full randomization?
Date	2015-09-15 10:40 +0200
Message-ID	<q8TWq-7VB-15@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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First, my linux kernel is Linux 114-212-83-136 4.1.0-2-amd64.
Second, I copy /bin/cat in system to mycat , and see the address space
layout below.

mdl@114-212-83-136:~$ ./mycat /proc/self/maps
00400000-0040c000 r-xp 00000000 08:03 1046776
 /home/mdl/mycat
0060b000-0060c000 r--p 0000b000 08:03 1046776
 /home/mdl/mycat
0060c000-0060d000 rw-p 0000c000 08:03 1046776
 /home/mdl/mycat
01da7000-01dc8000 rw-p 00000000 00:00 0
 [heap]
......

The starting address of executable image is constant with my aslr
configuration 2 (full randomization).
I think text segment should be inconstant to defeat the attack like
reusing text code!
Is it related to fixing offset2lib attack?
Thanks for any help!
    - mudongliang
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why is text address constant with full randomization? 慕冬亮 <mudongliangabcd@gmail.com> - 2015-09-15 10:40 +0200
  Re: why is text address constant with full randomization? yalin wang <yalin.wang2010@gmail.com> - 2015-09-15 12:00 +0200
    Re: why is text address constant with full randomization? 慕冬亮 <mudongliangabcd@gmail.com> - 2015-09-21 16:40 +0200
      Re: why is text address constant with full randomization? Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-09-21 21:00 +0200

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