# $FreeBSD$

# Part of a unified Makefile for building kernels.  This part includes all
# the definitions that need to be after all the % directives except %RULES
# and ones that act like they are part of %RULES.
#
# Most make variables should not be defined in this file.  Instead, they
# should be defined in the kern.pre.mk so that port makefiles can
# override or augment them.

# In case the config had a makeoptions DESTDIR...
.if defined(DESTDIR)
MKMODULESENV+=	DESTDIR="${DESTDIR}"
.endif
SYSDIR?= ${S:C;^[^/];${.CURDIR}/&;}
MKMODULESENV+=	KERNBUILDDIR="${.CURDIR}" SYSDIR="${SYSDIR}"

.if defined(CONF_CFLAGS)
MKMODULESENV+=	CONF_CFLAGS="${CONF_CFLAGS}"
.endif

.if defined(WITH_CTF)
MKMODULESENV+=	WITH_CTF="${WITH_CTF}"
.endif

# Allow overriding the kernel debug directory, so kernel and user debug may be
# installed in different directories. Setting it to "" restores the historical
# behavior of installing debug files in the kernel directory.
KERN_DEBUGDIR?=	${DEBUGDIR}

.MAIN: all

.for target in all clean cleandepend cleandir clobber depend install \
    obj reinstall tags
${target}: kernel-${target}
.if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
${target}: modules-${target}
modules-${target}:
	cd $S/modules; ${MKMODULESENV} ${MAKE} \
	    ${target:S/^reinstall$/install/:S/^clobber$/cleandir/}
.endif
.endfor

# Handle ports (as defined by the user) that build kernel modules
.if !defined(NO_MODULES) && defined(PORTS_MODULES)
#
# The ports tree needs some environment variables defined to match the new kernel
#
# Ports search for some dependencies in PATH, so add the location of the installed files
LOCALBASE?=	/usr/local
# SRC_BASE is how the ports tree refers to the location of the base source files
.if !defined(SRC_BASE)
SRC_BASE!=	realpath "${SYSDIR:H}/"
.endif
# OSVERSION is used by some ports to determine build options
.if !defined(OSRELDATE)
# Definition copied from src/Makefile.inc1
OSRELDATE!=	awk '/^\#define[[:space:]]*__FreeBSD_version/ { print $$3 }' \
		    ${MAKEOBJDIRPREFIX}${SRC_BASE}/include/osreldate.h
.endif
# Keep the related ports builds in the obj directory so that they are only rebuilt once per kernel build
WRKDIRPREFIX?=	${MAKEOBJDIRPREFIX}${SRC_BASE}/sys/${KERNCONF}
PORTSMODULESENV=\
	PATH=${PATH}:${LOCALBASE}/bin:${LOCALBASE}/sbin \
	SRC_BASE=${SRC_BASE} \
	OSVERSION=${OSRELDATE} \
	WRKDIRPREFIX=${WRKDIRPREFIX}

# The WRKDIR needs to be cleaned before building, and trying to change the target
# with a :C pattern below results in install -> instclean
all:
.for __i in ${PORTS_MODULES}
	@${ECHO} "===> Ports module ${__i} (all)"
	cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B clean all
.endfor

.for __target in install reinstall clean
${__target}: ports-${__target}
ports-${__target}:
.for __i in ${PORTS_MODULES}
	@${ECHO} "===> Ports module ${__i} (${__target})"
	cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B ${__target:C/install/deinstall reinstall/:C/reinstall/deinstall reinstall/}
.endfor
.endfor
.endif

.ORDER: kernel-install modules-install

kernel-all: ${KERNEL_KO} ${KERNEL_EXTRA}

kernel-cleandir: kernel-clean kernel-cleandepend

kernel-clobber:
	find . -maxdepth 1 ! -type d ! -name version -delete

kernel-obj:

.if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
modules: modules-all

.if !defined(NO_MODULES_OBJ)
modules-all modules-depend: modules-obj
.endif
.endif

.if !defined(DEBUG)
FULLKERNEL=	${KERNEL_KO}
.else
FULLKERNEL=	${KERNEL_KO}.full
${KERNEL_KO}: ${FULLKERNEL} ${KERNEL_KO}.debug
	${OBJCOPY} --strip-debug --add-gnu-debuglink=${KERNEL_KO}.debug \
	    ${FULLKERNEL} ${.TARGET}
${KERNEL_KO}.debug: ${FULLKERNEL}
	${OBJCOPY} --only-keep-debug ${FULLKERNEL} ${.TARGET}
install.debug reinstall.debug: gdbinit
	cd ${.CURDIR}; ${MAKE} ${.TARGET:R}

# Install gdbinit files for kernel debugging.
gdbinit:
	grep -v '# XXX' ${S}/../tools/debugscripts/dot.gdbinit | \
	    sed "s:MODPATH:${.OBJDIR}/modules:" > .gdbinit
	cp ${S}/../tools/debugscripts/gdbinit.kernel ${.CURDIR}
.if exists(${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH})
	cp ${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH} \
	    ${.CURDIR}/gdbinit.machine
.endif
.endif

${FULLKERNEL}: ${SYSTEM_DEP} vers.o
	@rm -f ${.TARGET}
	@echo linking ${.TARGET}
	${SYSTEM_LD}
.if ${MK_CTF} != "no"
	@echo ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ...
	@${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
.endif
.if !defined(DEBUG)
	${OBJCOPY} --strip-debug ${.TARGET}
.endif
	${SYSTEM_LD_TAIL}

.if !exists(${.OBJDIR}/.depend)
${SYSTEM_OBJS}: assym.s vnode_if.h ${BEFORE_DEPEND:M*.h} ${MFILES:T:S/.m$/.h/}
.endif

LNFILES=	${CFILES:T:S/.c$/.ln/}

.for mfile in ${MFILES}
# XXX the low quality .m.o rules gnerated by config are normally used
# instead of the .m.c rules here.
${mfile:T:S/.m$/.c/}: ${mfile}
	${AWK} -f $S/tools/makeobjops.awk ${mfile} -c
${mfile:T:S/.m$/.h/}: ${mfile}
	${AWK} -f $S/tools/makeobjops.awk ${mfile} -h
.endfor

kernel-clean:
	rm -f *.o *.so *.So *.ko *.s eddep errs \
	    ${FULLKERNEL} ${KERNEL_KO} ${KERNEL_KO}.debug \
	    linterrs tags vers.c \
	    vnode_if.c vnode_if.h vnode_if_newproto.h vnode_if_typedef.h \
	    ${MFILES:T:S/.m$/.c/} ${MFILES:T:S/.m$/.h/} \
	    ${CLEAN}

lint: ${LNFILES}
	${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC} 2>&1 | \
	    tee -a linterrs

# This is a hack.  BFD "optimizes" away dynamic mode if there are no
# dynamic references.  We could probably do a '-Bforcedynamic' mode like
# in the a.out ld.  For now, this works.
HACK_EXTRA_FLAGS?= -shared
hack.So: Makefile
	:> hack.c
	${CC} ${HACK_EXTRA_FLAGS} -nostdlib hack.c -o hack.So
	rm -f hack.c

# This rule stops ./assym.s in .depend from causing problems.
./assym.s: assym.s

assym.s: $S/kern/genassym.sh genassym.o
	NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genassym.sh genassym.o > ${.TARGET}

genassym.o: $S/$M/$M/genassym.c
	${CC} -c ${CFLAGS:N-fno-common} $S/$M/$M/genassym.c

${SYSTEM_OBJS} genassym.o vers.o: opt_global.h

# We have "special" -I include paths for zfs/dtrace files in 'depend'.
CFILES_NOCDDL=	${CFILES:N*/cddl/*:N*fs/nfsclient/nfs_clkdtrace*}
SFILES_NOCDDL=	${SFILES:N*/cddl/*}
CFILES_CDDL=	${CFILES:M*/cddl/*}
SFILES_CDDL=	${SFILES:M*/cddl/*}

kernel-depend: .depend
# The argument list can be very long, so use make -V and xargs to
# pass it to mkdep.
_MKDEPCC:= ${CC:N${CCACHE_BIN}}
SRCS=	assym.s vnode_if.h ${BEFORE_DEPEND} ${CFILES} \
	${SYSTEM_CFILES} ${GEN_CFILES} ${SFILES} \
	${MFILES:T:S/.m$/.h/}
DEPENDFILES=	.depend
.if ${MK_FAST_DEPEND} == "yes" && ${.MAKE.MODE:Unormal:Mmeta*} == ""
DEPENDFILES+=	.depend.*
DEPEND_CFLAGS+=	-MD -MP -MF.depend.${.TARGET}
DEPEND_CFLAGS+=	-MT${.TARGET}
CFLAGS+=	${DEPEND_CFLAGS}
DEPENDOBJS+=	${SYSTEM_OBJS}
.for __obj in ${DEPENDOBJS:O:u}
.if ${.MAKEFLAGS:M-V} == ""
.sinclude ".depend.${__obj}"
.endif
DEPENDFILES_OBJS+=	.depend.${__obj}
.endfor
.endif	# ${MK_FAST_DEPEND} == "yes"

.NOPATH: .depend ${DEPENDFILES_OBJS}

.depend: .PRECIOUS ${SRCS}
.if ${MK_FAST_DEPEND} == "no"
	rm -f ${.TARGET}.tmp
	${MAKE} -V CFILES_NOCDDL -V SYSTEM_CFILES -V GEN_CFILES | \
	    CC="${_MKDEPCC}" xargs mkdep -a -f ${.TARGET}.tmp ${CFLAGS}
	${MAKE} -V CFILES_CDDL | \
	    CC="${_MKDEPCC}" xargs mkdep -a -f ${.TARGET}.tmp ${ZFS_CFLAGS} \
	    ${FBT_CFLAGS} ${DTRACE_CFLAGS}
	${MAKE} -V SFILES_NOCDDL | \
	    CC="${_MKDEPCC}" xargs mkdep -a -f ${.TARGET}.tmp ${ASM_CFLAGS}
	${MAKE} -V SFILES_CDDL | \
	    CC="${_MKDEPCC}" xargs mkdep -a -f ${.TARGET}.tmp ${ZFS_ASM_CFLAGS}
	mv ${.TARGET}.tmp ${.TARGET}
.else
	: > ${.TARGET}
.endif

_ILINKS= machine
.if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64"
_ILINKS+= ${MACHINE_CPUARCH}
.endif
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
_ILINKS+= x86
.endif

# Ensure that the link exists without depending on it when it exists.
.for _link in ${_ILINKS}
.if !exists(${.OBJDIR}/${_link})
${SRCS} ${CLEAN:M*.o}: ${_link}
.endif
.endfor

${_ILINKS}:
	@case ${.TARGET} in \
	machine) \
		path=${S}/${MACHINE}/include ;; \
	*) \
		path=${S}/${.TARGET}/include ;; \
	esac ; \
	${ECHO} ${.TARGET} "->" $$path ; \
	ln -s $$path ${.TARGET}

# .depend needs include links so we remove them only together.
kernel-cleandepend: .PHONY
	rm -f ${DEPENDFILES} ${_ILINKS}

kernel-tags:
	@[ -f .depend ] || { echo "you must make depend first"; exit 1; }
	sh $S/conf/systags.sh

kernel-install:
	@if [ ! -f ${KERNEL_KO} ] ; then \
		echo "You must build a kernel first." ; \
		exit 1 ; \
	fi
.if exists(${DESTDIR}${KODIR})
	-thiskernel=`sysctl -n kern.bootfile` ; \
	if [ ! "`dirname "$$thiskernel"`" -ef ${DESTDIR}${KODIR} ] ; then \
		chflags -R noschg ${DESTDIR}${KODIR} ; \
		rm -rf ${DESTDIR}${KODIR} ; \
		rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ; \
	else \
		if [ -d ${DESTDIR}${KODIR}.old ] ; then \
			chflags -R noschg ${DESTDIR}${KODIR}.old ; \
			rm -rf ${DESTDIR}${KODIR}.old ; \
		fi ; \
		mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old ; \
		if [ -n "${KERN_DEBUGDIR}" -a \
		     -d ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ]; then \
			rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
			mv ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
		fi ; \
		sysctl kern.bootfile=${DESTDIR}${KODIR}.old/"`basename "$$thiskernel"`" ; \
	fi
.endif
	mkdir -p ${DESTDIR}${KODIR}
	${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
.if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
	mkdir -p ${DESTDIR}${KERN_DEBUGDIR}${KODIR}
	${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
.endif
.if defined(KERNEL_EXTRA_INSTALL)
	${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_EXTRA_INSTALL} ${DESTDIR}${KODIR}/
.endif



kernel-reinstall:
	@-chflags -R noschg ${DESTDIR}${KODIR}
	${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
.if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
	${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
.endif

config.o env.o hints.o vers.o vnode_if.o:
	${NORMAL_C}
	${NORMAL_CTFCONVERT}

config.ln env.ln hints.ln vers.ln vnode_if.ln:
	${NORMAL_LINT}

vers.c: $S/conf/newvers.sh $S/sys/param.h ${SYSTEM_DEP}
	MAKE=${MAKE} sh $S/conf/newvers.sh ${KERN_IDENT}

vnode_if.c: $S/tools/vnode_if.awk $S/kern/vnode_if.src
	${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -c

vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: $S/tools/vnode_if.awk \
    $S/kern/vnode_if.src
vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
	${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -h
vnode_if_newproto.h:
	${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -p
vnode_if_typedef.h:
	${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -q

.if ${MFS_IMAGE:Uno} != "no"
# Generate an object file from the file system image to embed in the kernel
# via linking. Make sure the contents are in the mfs section and rename the
# start/end/size variables to __start_mfs, __stop_mfs, and mfs_size,
# respectively.
embedfs_${MFS_IMAGE:T:R}.o: ${MFS_IMAGE}
	${OBJCOPY} --input-target binary \
	    --output-target ${EMBEDFS_FORMAT.${MACHINE_ARCH}} \
	    --binary-architecture ${EMBEDFS_ARCH.${MACHINE_ARCH}} \
	    ${MFS_IMAGE} ${.TARGET}
	${OBJCOPY} \
	    --rename-section .data=mfs,contents,alloc,load,readonly,data \
	    --redefine-sym \
		_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_size=__mfs_root_size \
	    --redefine-sym \
		_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_start=mfs_root \
	    --redefine-sym \
		_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_end=mfs_root_end \
	    ${.TARGET}
.endif

# XXX strictly, everything depends on Makefile because changes to ${PROF}
# only appear there, but we don't handle that.

.include "kern.mk"