kmod.mk revision 281627 
1#	From: @(#)bsd.prog.mk	5.26 (Berkeley) 6/25/91
2# $FreeBSD: head/sys/conf/kmod.mk 281627 2015-04-16 22:34:10Z emaste $
3#
4# The include file <bsd.kmod.mk> handles building and installing loadable
5# kernel modules.
6#
7#
8# +++ variables +++
9#
10# CLEANFILES	Additional files to remove for the clean and cleandir targets.
11#
12# EXPORT_SYMS	A list of symbols that should be exported from the module,
13#		or the name of a file containing a list of symbols, or YES
14#		to export all symbols.  If not defined, no symbols are
15#		exported.
16#
17# KMOD		The name of the kernel module to build.
18#
19# KMODDIR	Base path for kernel modules (see kld(4)). [/boot/kernel]
20#
21# KMODOWN	Module file owner. [${BINOWN}]
22#
23# KMODGRP	Module file group. [${BINGRP}]
24#
25# KMODMODE	Module file mode. [${BINMODE}]
26#
27# KMODLOAD	Command to load a kernel module [/sbin/kldload]
28#
29# KMODUNLOAD	Command to unload a kernel module [/sbin/kldunload]
30#
31# MFILES	Optionally a list of interfaces used by the module.
32#		This file contains a default list of interfaces.
33#
34# PROG		The name of the kernel module to build.
35#		If not supplied, ${KMOD}.ko is used.
36#
37# SRCS		List of source files.
38#
39# FIRMWS	List of firmware images in format filename:shortname:version
40#
41# FIRMWARE_LICENSE
42#		Set to the name of the license the user has to agree on in
43#		order to use this firmware. See /usr/share/doc/legal
44#
45# DESTDIR	The tree where the module gets installed. [not set]
46#
47# +++ targets +++
48#
49# 	install:
50#               install the kernel module; if the Makefile
51#               does not itself define the target install, the targets
52#               beforeinstall and afterinstall may also be used to cause
53#               actions immediately before and after the install target
54#		is executed.
55#
56# 	load:
57#		Load a module.
58#
59# 	unload:
60#		Unload a module.
61#
62
63AWK?=		awk
64KMODLOAD?=	/sbin/kldload
65KMODUNLOAD?=	/sbin/kldunload
66OBJCOPY?=	objcopy
67
68.include <bsd.init.mk>
69# Grab all the options for a kernel build. For backwards compat, we need to
70# do this after bsd.own.mk.
71.include "kern.opts.mk"
72.include <bsd.compiler.mk>
73.include "config.mk"
74
75.SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S
76
77# amd64 and mips use direct linking for kmod, all others use shared binaries
78.if ${MACHINE_CPUARCH} != amd64 && ${MACHINE_CPUARCH} != mips
79__KLD_SHARED=yes
80.else
81__KLD_SHARED=no
82.endif
83
84.if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
85CFLAGS+=	-fno-strict-aliasing
86.endif
87WERROR?=	-Werror
88CFLAGS+=	${WERROR}
89CFLAGS+=	-D_KERNEL
90CFLAGS+=	-DKLD_MODULE
91
92# Don't use any standard or source-relative include directories.
93NOSTDINC=	-nostdinc
94CFLAGS:=	${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
95.if defined(KERNBUILDDIR)
96CFLAGS+=	-DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
97.endif
98
99# Add -I paths for system headers.  Individual module makefiles don't
100# need any -I paths for this.  Similar defaults for .PATH can't be
101# set because there are no standard paths for non-headers.
102CFLAGS+=	-I. -I${SYSDIR}
103
104CFLAGS.gcc+=	-finline-limit=${INLINE_LIMIT}
105CFLAGS.gcc+=	-fms-extensions
106CFLAGS.gcc+= --param inline-unit-growth=100
107CFLAGS.gcc+= --param large-function-growth=1000
108
109# Disallow common variables, and if we end up with commons from
110# somewhere unexpected, allocate storage for them in the module itself.
111CFLAGS+=	-fno-common
112LDFLAGS+=	-d -warn-common
113
114CFLAGS+=	${DEBUG_FLAGS}
115.if ${MACHINE_CPUARCH} == amd64
116CFLAGS+=	-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
117.endif
118
119# Temporary workaround for PR 196407, which contains the fascinating details.
120# Don't allow clang to use fpu instructions or registers in kernel modules.
121.if ${MACHINE_CPUARCH} == arm
122CFLAGS.clang+=	-mllvm -arm-use-movt=0
123CFLAGS.clang+=	-mfpu=none
124CFLAGS+=	-funwind-tables
125.endif
126
127.if ${MACHINE_CPUARCH} == powerpc
128CFLAGS+=	-mlongcall -fno-omit-frame-pointer
129.endif
130
131.if ${MACHINE_CPUARCH} == mips
132CFLAGS+=	-G0 -fno-pic -mno-abicalls -mlong-calls
133.endif
134
135.if defined(DEBUG) || defined(DEBUG_FLAGS)
136CTFFLAGS+=	-g
137.endif
138
139.if defined(FIRMWS)
140${KMOD:S/$/.c/}: ${SYSDIR}/tools/fw_stub.awk
141	${AWK} -f ${SYSDIR}/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
142	    ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
143
144SRCS+=	${KMOD:S/$/.c/}
145CLEANFILES+=	${KMOD:S/$/.c/}
146
147.for _firmw in ${FIRMWS}
148${_firmw:C/\:.*$/.fwo/}:	${_firmw:C/\:.*$//}
149	@${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
150	@if [ -e ${_firmw:C/\:.*$//} ]; then			\
151		${LD} -b binary --no-warn-mismatch ${_LDFLAGS}	\
152		    -r -d -o ${.TARGET}	${_firmw:C/\:.*$//};	\
153	else							\
154		ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \
155		${LD} -b binary --no-warn-mismatch ${_LDFLAGS}	\
156		    -r -d -o ${.TARGET}	${_firmw:C/\:.*$//};	\
157		rm ${_firmw:C/\:.*$//};				\
158	fi
159
160OBJS+=	${_firmw:C/\:.*$/.fwo/}
161.endfor
162.endif
163
164# Conditionally include SRCS based on kernel config options.
165.for _o in ${KERN_OPTS}
166SRCS+=${SRCS.${_o}}
167.endfor
168
169OBJS+=	${SRCS:N*.h:R:S/$/.o/g}
170
171.if !defined(PROG)
172PROG=	${KMOD}.ko
173.endif
174
175.if !defined(DEBUG_FLAGS)
176FULLPROG=	${PROG}
177.else
178FULLPROG=	${PROG}.debug
179${PROG}: ${FULLPROG} ${PROG}.symbols
180	${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.symbols\
181	    ${FULLPROG} ${.TARGET}
182${PROG}.symbols: ${FULLPROG}
183	${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
184.endif
185
186.if ${__KLD_SHARED} == yes
187${FULLPROG}: ${KMOD}.kld
188	${LD} -Bshareable ${_LDFLAGS} -o ${.TARGET} ${KMOD}.kld
189.if !defined(DEBUG_FLAGS)
190	${OBJCOPY} --strip-debug ${.TARGET}
191.endif
192.endif
193
194EXPORT_SYMS?=	NO
195.if ${EXPORT_SYMS} != YES
196CLEANFILES+=	export_syms
197.endif
198
199.if ${__KLD_SHARED} == yes
200${KMOD}.kld: ${OBJS}
201.else
202${FULLPROG}: ${OBJS}
203.endif
204	${LD} ${_LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
205.if ${MK_CTF} != "no"
206	${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${OBJS}
207.endif
208.if defined(EXPORT_SYMS)
209.if ${EXPORT_SYMS} != YES
210.if ${EXPORT_SYMS} == NO
211	:> export_syms
212.elif !exists(${.CURDIR}/${EXPORT_SYMS})
213	echo ${EXPORT_SYMS} > export_syms
214.else
215	grep -v '^#' < ${EXPORT_SYMS} > export_syms
216.endif
217	awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
218	    export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
219.endif
220.endif
221.if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no
222	${OBJCOPY} --strip-debug ${.TARGET}
223.endif
224
225_ILINKS=machine
226.if ${MACHINE} != ${MACHINE_CPUARCH}
227_ILINKS+=${MACHINE_CPUARCH}
228.endif
229.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
230_ILINKS+=x86
231.endif
232CLEANFILES+=${_ILINKS}
233
234all: objwarn ${PROG}
235
236beforedepend: ${_ILINKS}
237
238# Ensure that the links exist without depending on it when it exists which
239# causes all the modules to be rebuilt when the directory pointed to changes.
240.for _link in ${_ILINKS}
241.if !exists(${.OBJDIR}/${_link})
242${OBJS}: ${.OBJDIR}/${_link}
243.endif
244.endfor
245
246# Search for kernel source tree in standard places.
247.for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
248.if !defined(SYSDIR) && exists(${_dir}/kern/)
249SYSDIR=	${_dir}
250.endif
251.endfor
252.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
253.error "can't find kernel source tree"
254.endif
255
256.for _link in ${_ILINKS}
257.PHONY: ${_link}
258${_link}: ${.OBJDIR}/${_link}
259
260${.OBJDIR}/${_link}:
261	@case ${.TARGET:T} in \
262	machine) \
263		path=${SYSDIR}/${MACHINE}/include ;; \
264	*) \
265		path=${SYSDIR}/${.TARGET:T}/include ;; \
266	esac ; \
267	path=`(cd $$path && /bin/pwd)` ; \
268	${ECHO} ${.TARGET:T} "->" $$path ; \
269	ln -sf $$path ${.TARGET:T}
270.endfor
271
272CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
273
274.if defined(DEBUG_FLAGS)
275CLEANFILES+= ${FULLPROG} ${PROG}.symbols
276.endif
277
278.if !target(install)
279
280_INSTALLFLAGS:=	${INSTALLFLAGS}
281.for ie in ${INSTALLFLAGS_EDIT}
282_INSTALLFLAGS:=	${_INSTALLFLAGS${ie}}
283.endfor
284
285.if !target(realinstall)
286realinstall: _kmodinstall
287.ORDER: beforeinstall _kmodinstall
288_kmodinstall:
289	${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
290	    ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}
291.if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
292	${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
293	    ${_INSTALLFLAGS} ${PROG}.symbols ${DESTDIR}${KMODDIR}
294.endif
295
296.include <bsd.links.mk>
297
298.if !defined(NO_XREF)
299afterinstall: _kldxref
300.ORDER: realinstall _kldxref
301.ORDER: _installlinks _kldxref
302_kldxref:
303	@if type kldxref >/dev/null 2>&1; then \
304		${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
305		kldxref ${DESTDIR}${KMODDIR}; \
306	fi
307.endif
308.endif # !target(realinstall)
309
310.endif # !target(install)
311
312.if !target(load)
313load: ${PROG}
314	${KMODLOAD} -v ${.OBJDIR}/${PROG}
315.endif
316
317.if !target(unload)
318unload:
319	${KMODUNLOAD} -v ${PROG}
320.endif
321
322.if defined(KERNBUILDDIR)
323.PATH: ${KERNBUILDDIR}
324CFLAGS+=	-I${KERNBUILDDIR}
325.for _src in ${SRCS:Mopt_*.h}
326CLEANFILES+=	${_src}
327.if !target(${_src})
328${_src}:
329	ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
330.endif
331.endfor
332.else
333.for _src in ${SRCS:Mopt_*.h}
334CLEANFILES+=	${_src}
335.if !target(${_src})
336${_src}:
337	:> ${.TARGET}
338.endif
339.endfor
340.endif
341
342# Respect configuration-specific C flags.
343CFLAGS+=	${CONF_CFLAGS}
344
345MFILES?= dev/acpica/acpi_if.m dev/acpi_support/acpi_wmi_if.m \
346	dev/agp/agp_if.m dev/ata/ata_if.m dev/eisa/eisa_if.m \
347	dev/fb/fb_if.m dev/gpio/gpio_if.m dev/gpio/gpiobus_if.m \
348	dev/iicbus/iicbb_if.m dev/iicbus/iicbus_if.m \
349	dev/mbox/mbox_if.m dev/mmc/mmcbr_if.m dev/mmc/mmcbus_if.m \
350	dev/mii/miibus_if.m dev/mvs/mvs_if.m dev/ofw/ofw_bus_if.m \
351	dev/pccard/card_if.m dev/pccard/power_if.m dev/pci/pci_if.m \
352	dev/pci/pcib_if.m dev/ppbus/ppbus_if.m \
353	dev/sdhci/sdhci_if.m dev/smbus/smbus_if.m dev/spibus/spibus_if.m \
354	dev/sound/pci/hda/hdac_if.m \
355	dev/sound/pcm/ac97_if.m dev/sound/pcm/channel_if.m \
356	dev/sound/pcm/feeder_if.m dev/sound/pcm/mixer_if.m \
357	dev/sound/midi/mpu_if.m dev/sound/midi/mpufoi_if.m \
358	dev/sound/midi/synth_if.m dev/usb/usb_if.m isa/isa_if.m \
359	kern/bus_if.m kern/clock_if.m \
360	kern/cpufreq_if.m kern/device_if.m kern/serdev_if.m \
361	libkern/iconv_converter_if.m opencrypto/cryptodev_if.m \
362	pc98/pc98/canbus_if.m dev/etherswitch/mdio_if.m
363
364.for _srcsrc in ${MFILES}
365.for _ext in c h
366.for _src in ${SRCS:M${_srcsrc:T:R}.${_ext}}
367CLEANFILES+=	${_src}
368.if !target(${_src})
369${_src}: ${SYSDIR}/tools/makeobjops.awk ${SYSDIR}/${_srcsrc}
370	${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${SYSDIR}/${_srcsrc} -${_ext}
371.endif
372.endfor # _src
373.endfor # _ext
374.endfor # _srcsrc
375
376.if !empty(SRCS:Mvnode_if.c)
377CLEANFILES+=	vnode_if.c
378vnode_if.c: ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src
379	${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -c
380.endif
381
382.if !empty(SRCS:Mvnode_if.h)
383CLEANFILES+=	vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
384vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: ${SYSDIR}/tools/vnode_if.awk \
385    ${SYSDIR}/kern/vnode_if.src
386vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
387	${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -h
388vnode_if_newproto.h:
389	${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -p
390vnode_if_typedef.h:
391	${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -q
392.endif
393
394.for _i in mii pccard
395.if !empty(SRCS:M${_i}devs.h)
396CLEANFILES+=	${_i}devs.h
397${_i}devs.h: ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
398	${AWK} -f ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
399.endif
400.endfor # _i
401
402.if !empty(SRCS:Musbdevs.h)
403CLEANFILES+=	usbdevs.h
404usbdevs.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
405	${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -h
406.endif
407
408.if !empty(SRCS:Musbdevs_data.h)
409CLEANFILES+=	usbdevs_data.h
410usbdevs_data.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
411	${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -d
412.endif
413
414.if !empty(SRCS:Macpi_quirks.h)
415CLEANFILES+=	acpi_quirks.h
416acpi_quirks.h: ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
417	${AWK} -f ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
418.endif
419
420.if !empty(SRCS:Massym.s)
421CLEANFILES+=	assym.s genassym.o
422assym.s: genassym.o
423.if defined(KERNBUILDDIR)
424genassym.o: opt_global.h
425.endif
426assym.s: ${SYSDIR}/kern/genassym.sh
427	sh ${SYSDIR}/kern/genassym.sh genassym.o > ${.TARGET}
428genassym.o: ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
429genassym.o: ${SRCS:Mopt_*.h}
430	${CC} -c ${CFLAGS:N-fno-common} \
431	    ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
432.endif
433
434lint: ${SRCS}
435	${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
436
437.if defined(KERNBUILDDIR)
438${OBJS}: opt_global.h
439.endif
440
441.include <bsd.dep.mk>
442
443cleandepend: cleanilinks
444# .depend needs include links so we remove them only together.
445cleanilinks:
446	rm -f ${_ILINKS}
447
448.if !exists(${.OBJDIR}/${DEPENDFILE})
449${OBJS}: ${SRCS:M*.h}
450.endif
451
452.include <bsd.obj.mk>
453.include "kern.mk"
454