Re: [announce] [patch] NX (No eXecute) support for x86, 2.6.7-rc2-bk2

[Ingo Molnar]

this is how the maps look like on distributions that dont have the 
PT_GNU_STACK:

 08048000-0804c000 r-xp 00000000 03:01 495264     /bin/cat
 0804c000-0804d000 rwxp 00003000 03:01 495264     /bin/cat
 0804d000-0806e000 rwxp 0804d000 00:00 0
 40000000-40014000 r-xp 00000000 03:01 319552     /lib/ld-2.3.3.so
 40014000-40015000 r--p 00014000 03:01 319552     /lib/ld-2.3.3.so
 40015000-40016000 rwxp 00015000 03:01 319552     /lib/ld-2.3.3.so
 40029000-4015d000 r-xp 00000000 03:01 176042     /lib/tls/libc-2.3.3.so
 4015d000-4015f000 r--p 00134000 03:01 176042     /lib/tls/libc-2.3.3.so
 4015f000-40161000 rwxp 00136000 03:01 176042     /lib/tls/libc-2.3.3.so
 40161000-40164000 rwxp 40161000 00:00 0
 40164000-40364000 r-xp 00000000 03:01 465837     /usr/lib/locale/locale-archive
 40364000-4036a000 r-xp 00902000 03:01 465837     /usr/lib/locale/locale-archive
 4036a000-40397000 r-xp 0090c000 03:01 465837     /usr/lib/locale/locale-archive
 40397000-40398000 r-xp 00942000 03:01 465837     /usr/lib/locale/locale-archive
 bfffe000-c0000000 rwxp bfffe000 00:00 0
 ffffe000-fffff000 ---p 00000000 00:00 0

so we can turn on NX safely - all but the library/binary .data areas are
executable. (and if any code assumes executability there then it
deserves that SEGFAULT ...)

	Ingo
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