#	$NetBSD: Makefile.aarch64,v 1.23.12.1 2023/09/11 13:35:37 martin Exp $

# Makefile for NetBSD
#
# This makefile is constructed from a machine description:
#	config machineid
# Most changes should be made in the machine description
#	/sys/arch/<arch>/conf/``machineid''
# after which you should do
#	config machineid
# Machine generic makefile changes should be made in
#	/sys/arch/arm/conf/Makefile.arm
# after which config should be rerun for all machines of that type.
#
# To specify debugging, add the config line: makeoptions DEBUG="-g"
# A better way is to specify -g only for a few files.
#
#	makeoptions DEBUGLIST="uvm* trap if_*"

USETOOLS?=	no
NEED_OWN_INSTALL_TARGET?=no
.include <bsd.own.mk>

##
## (1) port identification
##
THISARM=	$S/arch/${MACHINE}
ARM=		$S/arch/aarch64
GENASSYM_CONF=	${ARM}/aarch64/genassym.cf
.-include "$S/arch/${MACHINE}/conf/Makefile.${MACHINE}.inc"

##
## (2) compile settings
##
# CPPFLAGS set by platform-specific Makefile fragment.
CFLAGS+=	-march=armv8-a+nofp+nosimd
#CFLAGS+=	-fomit-frame-pointer
CFLAGS+=	-fno-omit-frame-pointer
CFLAGS+=	-mno-omit-leaf-frame-pointer
#CFLAGS+=	-mno-unaligned-access

.if defined(PROF) && ${HAVE_GCC:U0} > 0
# For accurate profiling, it is better to suppress the tail call.
CFLAGS+=	-fno-optimize-sibling-calls
.endif

.if ${ARMV83_PAC:U0} > 0 && ${ARMV85_BTI:U0} > 0
CFLAGS+=	-mbranch-protection=pac-ret+bti
.else
.if ${ARMV83_PAC:U0} > 0
CFLAGS+=	-mbranch-protection=pac-ret
.endif
.if ${ARMV85_BTI:U0} > 0
CFLAGS+=	-mbranch-protection=bti
.endif
.endif

.if ${KASAN:U0} > 0 && ${HAVE_GCC:U0} > 0
KASANFLAGS=	-fsanitize=kernel-address \
		--param asan-globals=1 --param asan-stack=1 \
		--param asan-instrument-allocas=1 \
		-fsanitize-address-use-after-scope \
		-fasan-shadow-offset=0xDFFF600000000000
.for f in subr_asan.c
KASANFLAGS.${f}=	# empty
.endfor
CFLAGS+=	${KASANFLAGS.${.IMPSRC:T}:U${KASANFLAGS}}
.endif

##
## (3) libkern and compat
##
OPT_MODULAR=	%MODULAR%

##
## (4) local objects, compile rules, and dependencies
##
MD_OBJS+=	${SYSTEM_FIRST_OBJ} locore.o
MD_CFILES+=
MD_SFILES+=	${SYSTEM_FIRST_SFILE} ${ARM}/aarch64/locore.S

.if defined(SYSTEM_FIRST_OBJ)
${SYSTEM_FIRST_OBJ}: ${SYSTEM_FIRST_SFILE} assym.h
	${NORMAL_S}
.endif

locore.o: ${ARM}/aarch64/locore.S assym.h
	${NORMAL_S}

##
## (5) link settings
##
KERNLDSCRIPT?=	${ARM}/conf/kern.ldscript
LOADADDRESS?=	0xffffc00000000000
LINKFLAGS_NORMAL=	-X

# Strip AArch64 mapping symbols from the kernel image, as they interfere
# with ddb, but don't strip them in netbsd.gdb. See Makefile.kern.inc.
ARCH_STRIP_SYMBOLS=	--strip-symbol='[$$][dx]' \
			--strip-symbol='[$$][dx]\.*'

##
## (6) port specific target dependencies
##

# depend on DIAGNOSTIC etc.
cpuswitch.o fault.o machdep.o: Makefile

# various assembly files that depend on assym.h
atomic.o bcopy_page.o bcopyinout.o copystr.o cpuswitch.o cpu_in_cksum.o: assym.h
exception.o sigcode.o: assym.h
spl.o vectors.o: assym.h

##
## (7) misc settings
##

# define .MAIN _before_ the make() check, so that implicit target
# would be defined
.MAIN: all

.if !make(obj) && !make(clean) && !make(cleandir)
.BEGIN::
	-@rm -f arm && \
		ln -s $S/arch/arm/include arm
.endif

##
## (8) config(8) generated machinery
##
%INCLUDES

%OBJS

%CFILES

%SFILES

%LOAD

%RULES

##
## (9) after the config file is inserted
##

##
## (10) port independent kernel machinery
##

.include "$S/conf/Makefile.kern.inc"

##
## (11) Appending make options.
##
%MAKEOPTIONSAPPEND