For logner description see:
http://mail-index.netbsd.org/current-users/2010/04/15/msg013117.html

diff -ruN src.old/usr.sbin/crash/Makefile src/usr.sbin/crash/Makefile
--- src.old/usr.sbin/crash/Makefile	2010-02-03 16:34:46.000000000 +0100
+++ src/usr.sbin/crash/Makefile	2010-04-17 13:57:53.000000000 +0200
@@ -4,7 +4,7 @@
 MAN=	crash.8
 RUMPKERNEL=	yes	# XXX: Avoid -mcmodel=kernel
 
-LDADD+=	-lkvm -ledit -lterminfo
+LDADD+=	-lkvm -ledit -lterminfo -T${.CURDIR}/ldscript.crash
 DPADD+=	${LIBKVM} ${LIBEDIT} ${LIBTERMINFO}
 
 # some ddb kernel components need limited modifications.  for now,
diff -ruN src.old/usr.sbin/crash/ldscript.crash src/usr.sbin/crash/ldscript.crash
--- src.old/usr.sbin/crash/ldscript.crash	1970-01-01 01:00:00.000000000 +0100
+++ src/usr.sbin/crash/ldscript.crash	2010-04-17 14:06:24.000000000 +0200
@@ -0,0 +1,9 @@
+
+SECTIONS
+{
+  .note.netbsd.ident :
+  { 
+    KEEP(*(.note.netbsd.ident));
+  }
+}
+INSERT AFTER .gnu.version_r;