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freebsd-nq/sys/conf/kmod.mk
Conrad Meyer 9b6edf364e kmod.mk: Don't split out debug symbols if requested 
Ports bsd.kmod.mk explicitly sets MK_KERNEL_SYMBOLS=no to prevent auto-
splitting of debuginfo from kernel modules.  If that knob is set, don't
split out a .ko.debug and .ko from .ko.full; just generate a .ko with
debuginfo and leave it be.

Otherwise, with DEBUG_FLAGS set and MK_KERNEL_SYMBOLS=no, we would helpfully
strip out the debuginfo from the .ko.full and then not install it.  That is
not the desired result a WITH_DEBUG port kmod build.

Reviewed by:	emaste, jhb
Differential Revision:	https://reviews.freebsd.org/D24835
2020-06-23 18:25:31 +00:00

539 lines
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# From: @(#)bsd.prog.mk 5.26 (Berkeley) 6/25/91
# $FreeBSD$
#
# The include file <bsd.kmod.mk> handles building and installing loadable
# kernel modules.
#
#
# +++ variables +++
#
# CLEANFILES Additional files to remove for the clean and cleandir targets.
#
# EXPORT_SYMS A list of symbols that should be exported from the module,
# or the name of a file containing a list of symbols, or YES
# to export all symbols. If not defined, no symbols are
# exported.
#
# KMOD The name of the kernel module to build.
#
# KMODDIR Base path for kernel modules (see kld(4)). [/boot/kernel]
#
# KMODOWN Module file owner. [${BINOWN}]
#
# KMODGRP Module file group. [${BINGRP}]
#
# KMODMODE Module file mode. [${BINMODE}]
#
# KMODLOAD Command to load a kernel module [/sbin/kldload]
#
# KMODUNLOAD Command to unload a kernel module [/sbin/kldunload]
#
# KMODISLOADED Command to check whether a kernel module is
# loaded [/sbin/kldstat -q -n]
#
# PROG The name of the kernel module to build.
# If not supplied, ${KMOD}.ko is used.
#
# SRCS List of source files.
#
# FIRMWS List of firmware images in format filename:shortname:version
#
# FIRMWARE_LICENSE
# Set to the name of the license the user has to agree on in
# order to use this firmware. See /usr/share/doc/legal
#
# DESTDIR The tree where the module gets installed. [not set]
#
# KERNBUILDDIR
# Set to the location of the kernel build directory where
# the opt_*.h files, .o's and kernel winds up.
#
# +++ targets +++
#
# install:
# install the kernel module; if the Makefile
# does not itself define the target install, the targets
# beforeinstall and afterinstall may also be used to cause
# actions immediately before and after the install target
# is executed.
#
# load:
# Load a module.
#
# unload:
# Unload a module.
#
# reload:
# Unload if loaded, then load.
#
AWK?= awk
KMODLOAD?= /sbin/kldload
KMODUNLOAD?= /sbin/kldunload
KMODISLOADED?= /sbin/kldstat -q -n
OBJCOPY?= objcopy
.include "kmod.opts.mk"
.include <bsd.sysdir.mk>
.SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S .m
# amd64 and mips use direct linking for kmod, all others use shared binaries
.if ${MACHINE_CPUARCH} != amd64 && ${MACHINE_CPUARCH} != mips
__KLD_SHARED=yes
.else
__KLD_SHARED=no
.endif
.if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
CFLAGS+= -fno-strict-aliasing
.endif
WERROR?= -Werror
LINUXKPI_GENSRCS+= \
bus_if.h \
device_if.h \
pci_if.h \
pci_iov_if.h \
vnode_if.h \
usb_if.h \
opt_usb.h \
opt_stack.h
CFLAGS+= ${WERROR}
CFLAGS+= -D_KERNEL
CFLAGS+= -DKLD_MODULE
.if defined(MODULE_TIED)
CFLAGS+= -DKLD_TIED
.endif
# Don't use any standard or source-relative include directories.
NOSTDINC= -nostdinc
CFLAGS:= ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
.if defined(KERNBUILDDIR)
CFLAGS+= -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
.else
SRCS+= opt_global.h
CFLAGS+= -include ${.OBJDIR}/opt_global.h
.endif
# Add -I paths for system headers. Individual module makefiles don't
# need any -I paths for this. Similar defaults for .PATH can't be
# set because there are no standard paths for non-headers.
CFLAGS+= -I. -I${SYSDIR} -I${SYSDIR}/contrib/ck/include
CFLAGS.gcc+= -finline-limit=${INLINE_LIMIT}
CFLAGS.gcc+= -fms-extensions
CFLAGS.gcc+= --param inline-unit-growth=100
CFLAGS.gcc+= --param large-function-growth=1000
# Disallow common variables, and if we end up with commons from
# somewhere unexpected, allocate storage for them in the module itself.
#
# -fno-common is the default for src builds, but this should be left in place
# until at least we catch up to GCC10/LLVM11 or otherwise enable -fno-common
# in <bsd.sys.mk> instead. For now, we will have duplicate -fno-common in
# CFLAGS for in-tree module builds as they will also pick it up from
# share/mk/src.sys.mk, but the following is important for out-of-tree modules
# (e.g. ports).
CFLAGS+= -fno-common
LDFLAGS+= -d -warn-common
.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
LDFLAGS+= --build-id=sha1
.endif
CFLAGS+= ${DEBUG_FLAGS}
.if ${MACHINE_CPUARCH} == amd64
CFLAGS+= -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
.endif
.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "riscv" || \
${MACHINE_CPUARCH} == "powerpc"
CFLAGS+= -fPIC
.endif
# Temporary workaround for PR 196407, which contains the fascinating details.
# Don't allow clang to use fpu instructions or registers in kernel modules.
.if ${MACHINE_CPUARCH} == arm
CFLAGS.clang+= -mno-movt
CFLAGS.clang+= -mfpu=none
CFLAGS+= -funwind-tables
.endif
.if ${MACHINE_CPUARCH} == powerpc
CFLAGS+= -mlongcall -fno-omit-frame-pointer
.if ${LINKER_TYPE} == "lld"
# TOC optimization in LLD (9.0) currently breaks kernel modules, so disable it
LDFLAGS+= --no-toc-optimize
.endif
.endif
.if ${MACHINE_CPUARCH} == mips
CFLAGS+= -G0 -fno-pic -mno-abicalls -mlong-calls
.endif
.if defined(DEBUG) || defined(DEBUG_FLAGS)
CTFFLAGS+= -g
.endif
.if defined(FIRMWS)
${KMOD:S/$/.c/}: ${SYSDIR}/tools/fw_stub.awk
${AWK} -f ${SYSDIR}/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
SRCS+= ${KMOD:S/$/.c/}
CLEANFILES+= ${KMOD:S/$/.c/}
.for _firmw in ${FIRMWS}
${_firmw:C/\:.*$/.fwo/:T}: ${_firmw:C/\:.*$//}
@${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
@if [ -e ${_firmw:C/\:.*$//} ]; then \
${LD} -b binary --no-warn-mismatch ${_LDFLAGS} \
-m ${LD_EMULATION} -r -d \
-o ${.TARGET} ${_firmw:C/\:.*$//}; \
else \
ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \
${LD} -b binary --no-warn-mismatch ${_LDFLAGS} \
-m ${LD_EMULATION} -r -d \
-o ${.TARGET} ${_firmw:C/\:.*$//}; \
rm ${_firmw:C/\:.*$//}; \
fi
OBJS+= ${_firmw:C/\:.*$/.fwo/:T}
.endfor
.endif
# Conditionally include SRCS based on kernel config options.
.for _o in ${KERN_OPTS}
SRCS+=${SRCS.${_o}}
.endfor
OBJS+= ${SRCS:N*.h:R:S/$/.o/g}
.if !defined(PROG)
PROG= ${KMOD}.ko
.endif
.if !defined(DEBUG_FLAGS) || ${MK_KERNEL_SYMBOLS} == "no"
FULLPROG= ${PROG}
.else
FULLPROG= ${PROG}.full
${PROG}: ${FULLPROG} ${PROG}.debug
${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.debug \
${FULLPROG} ${.TARGET}
${PROG}.debug: ${FULLPROG}
${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
.endif
.if ${__KLD_SHARED} == yes
${FULLPROG}: ${KMOD}.kld
${LD} -m ${LD_EMULATION} -Bshareable -znotext -znorelro ${_LDFLAGS} \
-o ${.TARGET} ${KMOD}.kld
.if !defined(DEBUG_FLAGS)
${OBJCOPY} --strip-debug ${.TARGET}
.endif
.endif
EXPORT_SYMS?= NO
.if ${EXPORT_SYMS} != YES
CLEANFILES+= export_syms
.endif
.if exists(${SYSDIR}/conf/ldscript.kmod.${MACHINE_ARCH})
LDSCRIPT_FLAGS?= -T ${SYSDIR}/conf/ldscript.kmod.${MACHINE_ARCH}
.endif
.if ${__KLD_SHARED} == yes
${KMOD}.kld: ${OBJS}
.else
${FULLPROG}: ${OBJS}
.endif
${LD} -m ${LD_EMULATION} ${_LDFLAGS} ${LDSCRIPT_FLAGS} -r -d \
-o ${.TARGET} ${OBJS}
.if ${MK_CTF} != "no"
${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${OBJS}
.endif
.if defined(EXPORT_SYMS)
.if ${EXPORT_SYMS} != YES
.if ${EXPORT_SYMS} == NO
:> export_syms
.elif !exists(${.CURDIR}/${EXPORT_SYMS})
echo -n "${EXPORT_SYMS:@s@$s${.newline}@}" > export_syms
.else
grep -v '^#' < ${EXPORT_SYMS} > export_syms
.endif
${AWK} -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
.endif
.endif # defined(EXPORT_SYMS)
.if defined(PREFIX_SYMS)
${AWK} -v prefix=${PREFIX_SYMS} -f ${SYSDIR}/conf/kmod_syms_prefix.awk \
${.TARGET} /dev/null | xargs -J% ${OBJCOPY} % ${.TARGET}
.endif
.if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no
${OBJCOPY} --strip-debug ${.TARGET}
.endif
_MAP_DEBUG_PREFIX= yes
_ILINKS=machine
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
_ILINKS+=x86
.endif
CLEANFILES+=${_ILINKS}
all: ${PROG}
beforedepend: ${_ILINKS}
beforebuild: ${_ILINKS}
# Ensure that the links exist without depending on it when it exists which
# causes all the modules to be rebuilt when the directory pointed to changes.
# Ensure that debug info references the path in the source tree.
.for _link in ${_ILINKS}
.if !exists(${.OBJDIR}/${_link})
OBJS_DEPEND_GUESS+= ${_link}
.endif
.if defined(_MAP_DEBUG_PREFIX)
.if ${_link} == "machine"
CFLAGS+= -fdebug-prefix-map=./machine=${SYSDIR}/${MACHINE}/include
.else
CFLAGS+= -fdebug-prefix-map=./${_link}=${SYSDIR}/${_link}/include
.endif
.endif
.endfor
.NOPATH: ${_ILINKS}
${_ILINKS}:
@case ${.TARGET} in \
machine) \
path=${SYSDIR}/${MACHINE}/include ;; \
*) \
path=${SYSDIR}/${.TARGET:T}/include ;; \
esac ; \
path=`(cd $$path && /bin/pwd)` ; \
${ECHO} ${.TARGET:T} "->" $$path ; \
ln -fns $$path ${.TARGET:T}
CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
.if defined(DEBUG_FLAGS) && ${MK_KERNEL_SYMBOLS} != "no"
CLEANFILES+= ${FULLPROG} ${PROG}.debug
.endif
.if !target(install)
_INSTALLFLAGS:= ${INSTALLFLAGS}
.for ie in ${INSTALLFLAGS_EDIT}
_INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
.endfor
.if !target(realinstall)
KERN_DEBUGDIR?= ${DEBUGDIR}
realinstall: _kmodinstall
.ORDER: beforeinstall _kmodinstall
_kmodinstall: .PHONY
${INSTALL} -T release -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}/
.if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
${INSTALL} -T dbg -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
${_INSTALLFLAGS} ${PROG}.debug ${DESTDIR}${KERN_DEBUGDIR}${KMODDIR}/
.endif
.include <bsd.links.mk>
.if !defined(NO_XREF)
afterinstall: _kldxref
.ORDER: realinstall _kldxref
.ORDER: _installlinks _kldxref
_kldxref: .PHONY
@if type kldxref >/dev/null 2>&1; then \
${ECHO} ${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \
${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \
fi
.endif
.endif # !target(realinstall)
.endif # !target(install)
.if !target(load)
load: ${PROG} .PHONY
${KMODLOAD} -v ${.OBJDIR}/${PROG}
.endif
.if !target(unload)
unload: .PHONY
if ${KMODISLOADED} ${PROG} ; then ${KMODUNLOAD} -v ${PROG} ; fi
.endif
.if !target(reload)
reload: unload load .PHONY
.endif
.if defined(KERNBUILDDIR)
.PATH: ${KERNBUILDDIR}
CFLAGS+= -I${KERNBUILDDIR}
.for _src in ${SRCS:Mopt_*.h}
CLEANFILES+= ${_src}
.if !target(${_src})
${_src}:
ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
.endif
.endfor
.else
.for _src in ${SRCS:Mopt_*.h}
CLEANFILES+= ${_src}
.if !target(${_src})
${_src}:
:> ${.TARGET}
.endif
.endfor
.endif
# Add the sanitizer C flags
CFLAGS+= ${SAN_CFLAGS}
# Add the gcov flags
CFLAGS+= ${GCOV_CFLAGS}
# Respect configuration-specific C flags.
CFLAGS+= ${ARCH_FLAGS} ${CONF_CFLAGS}
.if !empty(SRCS:Mvnode_if.c)
CLEANFILES+= vnode_if.c
vnode_if.c: ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src
${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -c
.endif
.if !empty(SRCS:Mvnode_if.h)
CLEANFILES+= vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: ${SYSDIR}/tools/vnode_if.awk \
${SYSDIR}/kern/vnode_if.src
vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -h
vnode_if_newproto.h:
${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -p
vnode_if_typedef.h:
${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -q
.endif
# Build _if.[ch] from _if.m, and clean them when we're done.
# __MPATH defined in config.mk
_MFILES=${__MPATH:T:O}
_MPATH=${__MPATH:H:O:u}
.PATH.m: ${_MPATH}
.for _i in ${SRCS:M*_if.[ch]}
_MATCH=M${_i:R:S/$/.m/}
_MATCHES=${_MFILES:${_MATCH}}
.if !empty(_MATCHES)
CLEANFILES+= ${_i}
.endif
.endfor # _i
.m.c: ${SYSDIR}/tools/makeobjops.awk
${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -c
.m.h: ${SYSDIR}/tools/makeobjops.awk
${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -h
.for _i in mii pccard
.if !empty(SRCS:M${_i}devs.h)
CLEANFILES+= ${_i}devs.h
${_i}devs.h: ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
${AWK} -f ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
.endif
.endfor # _i
.if !empty(SRCS:Mbhnd_nvram_map.h)
CLEANFILES+= bhnd_nvram_map.h
bhnd_nvram_map.h: ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.awk \
${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \
${SYSDIR}/dev/bhnd/nvram/nvram_map
bhnd_nvram_map.h:
sh ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \
${SYSDIR}/dev/bhnd/nvram/nvram_map -h
.endif
.if !empty(SRCS:Mbhnd_nvram_map_data.h)
CLEANFILES+= bhnd_nvram_map_data.h
bhnd_nvram_map_data.h: ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.awk \
${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \
${SYSDIR}/dev/bhnd/nvram/nvram_map
bhnd_nvram_map_data.h:
sh ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \
${SYSDIR}/dev/bhnd/nvram/nvram_map -d
.endif
.if !empty(SRCS:Musbdevs.h)
CLEANFILES+= usbdevs.h
usbdevs.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -h
.endif
.if !empty(SRCS:Musbdevs_data.h)
CLEANFILES+= usbdevs_data.h
usbdevs_data.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -d
.endif
.if !empty(SRCS:Msdiodevs.h)
CLEANFILES+= sdiodevs.h
sdiodevs.h: ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs
${AWK} -f ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs -h
.endif
.if !empty(SRCS:Msdiodevs_data.h)
CLEANFILES+= sdiodevs_data.h
sdiodevs_data.h: ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs
${AWK} -f ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs -d
.endif
.if !empty(SRCS:Macpi_quirks.h)
CLEANFILES+= acpi_quirks.h
acpi_quirks.h: ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
${AWK} -f ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
.endif
.if !empty(SRCS:Massym.inc) || !empty(DPSRCS:Massym.inc)
CLEANFILES+= assym.inc genassym.o
DEPENDOBJS+= genassym.o
DPSRCS+= offset.inc
.endif
.if defined(MODULE_TIED)
DPSRCS+= offset.inc
.endif
.if !empty(SRCS:Moffset.inc) || !empty(DPSRCS:Moffset.inc)
CLEANFILES+= offset.inc genoffset.o
DEPENDOBJS+= genoffset.o
.endif
assym.inc: genassym.o
offset.inc: genoffset.o
assym.inc: ${SYSDIR}/kern/genassym.sh
sh ${SYSDIR}/kern/genassym.sh genassym.o > ${.TARGET}
genassym.o: ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c offset.inc
genassym.o: ${SRCS:Mopt_*.h}
${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon \
${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
offset.inc: ${SYSDIR}/kern/genoffset.sh genoffset.o
sh ${SYSDIR}/kern/genoffset.sh genoffset.o > ${.TARGET}
genoffset.o: ${SYSDIR}/kern/genoffset.c
genoffset.o: ${SRCS:Mopt_*.h}
${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon \
${SYSDIR}/kern/genoffset.c
CLEANDEPENDFILES+= ${_ILINKS}
# .depend needs include links so we remove them only together.
cleanilinks:
rm -f ${_ILINKS}
OBJS_DEPEND_GUESS+= ${SRCS:M*.h}
.if defined(KERNBUILDDIR)
OBJS_DEPEND_GUESS+= opt_global.h
.endif
.include <bsd.dep.mk>
.include <bsd.clang-analyze.mk>
.include <bsd.obj.mk>
.include "kern.mk"
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