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freebsd-skq/sys/conf/kern.post.mk
bdrewery 533cb3d787 FAST_DEPEND: Fix incremental builds leading to kernel panics. 
This fixes .depend.genassym.o not being included.  genassym.o depends on
all of the system headers and when rebuilt regenerates assym.s which
lists offsets for critial .S files to utilize.  By having a struct in a
system header change its offsets and not have generassym.o be rebuilt,
this would lead to panics.

The flaw in the initial commit was seeing ${OBJS} in ${SYSTEM_OBJS} and
assuming it had all of ${SRCS} in it.  This is not the case though.  The
older mkdep code splits out all of the various SRC lists for generating
the .depend file.  It also includes ${GEN_CFILES}, which had genassym.c
and was the only significant file lacking from ${SYSTEM_OBJS} upon inspection,
since it is not linked in.  Rather than duplicate the likely
soon-to-be-removed mkdep lists, just add genassym.o to the DEPENDOBJS
list.  Using ${SRCS} as bsd.dep.mk does would be nice but there are many
files in the build that are only added to ${OBJS} and not ${SRCS}, such
as bf_enc.o derived from bf_enc.S for i386.

Sponsored by:	EMC / Isilon Storage Division
Reported by:	dhw (several panics on current@)
Pointyhat to:	bdrewery
2016-01-15 22:08:58 +00:00

360 lines
12 KiB
Makefile
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# $FreeBSD$
# 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} genassym.o
DEPENDFILES_OBJS= ${DEPENDOBJS:O:u:C/^/.depend./}
.if ${.MAKEFLAGS:M-V} == ""
.for __depend_obj in ${DEPENDFILES_OBJS}
.sinclude "${__depend_obj}"
.endfor
.endif
.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"
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