i compile with arm platform with glibc, in debug log the address order seems to be out of order

[junwushi]

/usr/bin/make -j3 clean -C /home/leoshi/workspace/NUC970_Buildroot/output/build/ndppd-0.2.5
rm -f ndppd ndppd.conf.5.gz ndppd.1.gz src/logger.o src/ndppd.o src/iface.o src/proxy.o src/address.o src/rule.o src/session.o src/conf.o src/route.o
/usr/bin/make -j3 CROSS_COMPILE=" /home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-" DEBUG=1 CXX=/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ OUT_BIN=ndppd AR=/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-ar STRIP=/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-strip CFLAGS= LDFLAGS= STAGING_DIR=/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/arm-nuvoton-linux-gnueabi/sysroot TARGET_DIR=/home/leoshi/workspace/NUC970_Buildroot/output/target -C /home/leoshi/workspace/NUC970_Buildroot/output/build/ndppd-0.2.5
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/logger.o src/logger.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/ndppd.o src/ndppd.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/iface.o src/iface.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/proxy.o src/proxy.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/address.o src/address.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/rule.o src/rule.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/session.o src/session.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/conf.o src/conf.cc
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -c -g -DDEBUG -o src/route.o src/route.cc
/bin/gzip < ndppd.1 > ndppd.1.gz
/bin/gzip < ndppd.conf.5 > ndppd.conf.5.gz
/home/leoshi/workspace/NUC970_Buildroot/output/host/usr/bin/arm-nuvoton-linux-gnueabi-g++ -o ndppd src/logger.o src/ndppd.o src/iface.o src/proxy.o src/address.o src/rule.o src/session.o src/conf.o src/route.o

below is debug log:
(debug) iface::read_solicit() saddr=2001:3aff:0:db8:5040:0:186a:317, daddr=ff02:2873::ff00:1, len=86
(debug) proxy::handle_solicit() saddr=2001:3aff:0:db8:5040:0:186a:317, taddr=2001:0:0:db8::

from wireshark:
156235 13793.882591 2001:db8::5040:317:186a:2873 ff02::1:ff00:1 ICMPv6 86 Neighbor Solicitation for 2001:db8::1 from e4:54:e8:dd:db:52