Pull up following revision(s) (requested by tsutsui in ticket #1420):

sys/arch/zaurus/stand/zbsdmod/Makefile: revision 1.12
sys/arch/zaurus/stand/zbsdmod/zbsdmod.c: revision 1.10
sys/arch/zaurus/conf/Makefile.zaurus.inc: revision 1.10
sys/arch/zaurus/stand/zbsdmod/zbsdmod.c: revision 1.11
sys/arch/zaurus/stand/zbsdmod/compat_linux.h: revision 1.7

Explicitly set empty LINKENTRY to keep ENTRY address specified in ldscript.

This fixes kernel boot failures of NetBSD/zaurus 8.x and later.
While here, also set empty TEXTADDR also specified in ldscript.

See my post in port-zaurus@ for details:
https://mail-index.netbsd.org/port-zaurus/2019/10/22/msg000069.html

Should be pulled up to netbsd-8 and netbsd-9.

-

Fix another boot failure issue of NetBSD/zaurus 8.x and later.

It looks some cacheline alignment restriction so that zbsdmod.o in
NetBSD/zaurus 8.x release cannot jump to a loaded kernel properly.

Adding an explicit alingment pseudo op to put all instructions
between I-cache flush and jumping to the loaded kernel into the
same cacheline solves the issue.

See my post in port-zaurus@ for details:
https://mail-index.netbsd.org/port-zaurus/2019/10/22/msg000069.html

Should be pulled up to netbsd-8 and netbsd-9.

-

Misc cleanup to avoid future confusion.
- Remove more unnecessary debug sections
- Use DBG instead of COPTS to specify -Os as defined in bsd.prog.mk
- Use CFLAGS and CPPFLAGS correctly
- Explicitly set -ffreestanding

-

Make sure to clear bss before jumping to a kernel copied from load buffer.
This will fix yet another boot failure issue
"screen white-out after loading a kernel"
https://mail-index.netbsd.org/port-zaurus/2019/10/26/msg000072.html

Should be pulled up to netbsd-8 and netbsd-9.

(martin)