Re: amd64: kernel aslr support

[David Holland <dholland-tech%netbsd.org@localhost>]

On Wed, Oct 04, 2017 at 06:59:02PM -0400, Mouse wrote:
 > > Here is a Kernel ASLR implementation for NetBSD-amd64.  [...]
 > 
 > > Contrary to what has been said in previous discussions, KASLR does
 > > not alter debugability in any way: the symbols are still mapped in
 > > memory as they are right now, and ddb resolves them as usual.
 > 
 > I disagree that that's enough to "not alter debugability in any way".
 > It makes common debugging tasks work, perhaps, but I have occasionally
 > run into cases where all I have is a pc value (even less often, but
 > it's still happened, a data address) and have had nothing but /netbsd's
 > symbol table to help me make sense of it.

Often also this is all one gets in a bug report. Not infrequently
these come from people who aren't really prepared to do much more to
investigate themselves than run nm -n /netbsd when asked.

-- 
David A. Holland
dholland%netbsd.org@localhost