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1 #       From: @(#)bsd.prog.mk   5.26 (Berkeley) 6/25/91
2 # $FreeBSD$
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 # PROG          The name of the kernel module to build.
32 #               If not supplied, ${KMOD}.ko is used.
33 #
34 # SRCS          List of source files.
35 #
36 # FIRMWS        List of firmware images in format filename:shortname:version
37 #
38 # FIRMWARE_LICENSE
39 #               Set to the name of the license the user has to agree on in
40 #               order to use this firmware. See /usr/share/doc/legal
41 #
42 # DESTDIR       The tree where the module gets installed. [not set]
43 #
44 # +++ targets +++
45 #
46 #       install:
47 #               install the kernel module; if the Makefile
48 #               does not itself define the target install, the targets
49 #               beforeinstall and afterinstall may also be used to cause
50 #               actions immediately before and after the install target
51 #               is executed.
52 #
53 #       load:
54 #               Load a module.
55 #
56 #       unload:
57 #               Unload a module.
58 #
59
60 AWK?=           awk
61 KMODLOAD?=      /sbin/kldload
62 KMODUNLOAD?=    /sbin/kldunload
63 OBJCOPY?=       objcopy
64
65 .include <bsd.init.mk>
66 # Grab all the options for a kernel build. For backwards compat, we need to
67 # do this after bsd.own.mk.
68 .include "kern.opts.mk"
69 .include <bsd.compiler.mk>
70 .include "config.mk"
71
72 .SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S .m
73
74 # amd64 and mips use direct linking for kmod, all others use shared binaries
75 .if ${MACHINE_CPUARCH} != amd64 && ${MACHINE_CPUARCH} != mips
76 __KLD_SHARED=yes
77 .else
78 __KLD_SHARED=no
79 .endif
80
81 .if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
82 CFLAGS+=        -fno-strict-aliasing
83 .endif
84 WERROR?=        -Werror
85 CFLAGS+=        ${WERROR}
86 CFLAGS+=        -D_KERNEL
87 CFLAGS+=        -DKLD_MODULE
88
89 # Don't use any standard or source-relative include directories.
90 NOSTDINC=       -nostdinc
91 CFLAGS:=        ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
92 .if defined(KERNBUILDDIR)
93 CFLAGS+=        -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
94 .endif
95
96 # Add -I paths for system headers.  Individual module makefiles don't
97 # need any -I paths for this.  Similar defaults for .PATH can't be
98 # set because there are no standard paths for non-headers.
99 CFLAGS+=        -I. -I${SYSDIR}
100
101 CFLAGS.gcc+=    -finline-limit=${INLINE_LIMIT}
102 CFLAGS.gcc+=    -fms-extensions
103 CFLAGS.gcc+= --param inline-unit-growth=100
104 CFLAGS.gcc+= --param large-function-growth=1000
105
106 # Disallow common variables, and if we end up with commons from
107 # somewhere unexpected, allocate storage for them in the module itself.
108 CFLAGS+=        -fno-common
109 LDFLAGS+=       -d -warn-common
110
111 CFLAGS+=        ${DEBUG_FLAGS}
112 .if ${MACHINE_CPUARCH} == amd64
113 CFLAGS+=        -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
114 .endif
115
116 .if ${MACHINE_CPUARCH} == "aarch64"
117 CFLAGS+=        -fPIC
118 .endif
119
120 # Temporary workaround for PR 196407, which contains the fascinating details.
121 # Don't allow clang to use fpu instructions or registers in kernel modules.
122 .if ${MACHINE_CPUARCH} == arm
123 CFLAGS.clang+=  -mllvm -arm-use-movt=0
124 CFLAGS.clang+=  -mfpu=none
125 CFLAGS+=        -funwind-tables
126 .endif
127
128 .if ${MACHINE_CPUARCH} == powerpc
129 CFLAGS+=        -mlongcall -fno-omit-frame-pointer
130 .endif
131
132 .if ${MACHINE_CPUARCH} == mips
133 CFLAGS+=        -G0 -fno-pic -mno-abicalls -mlong-calls
134 .endif
135
136 .if defined(DEBUG) || defined(DEBUG_FLAGS)
137 CTFFLAGS+=      -g
138 .endif
139
140 .if defined(FIRMWS)
141 ${KMOD:S/$/.c/}: ${SYSDIR}/tools/fw_stub.awk
142         ${AWK} -f ${SYSDIR}/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
143             ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
144
145 SRCS+=  ${KMOD:S/$/.c/}
146 CLEANFILES+=    ${KMOD:S/$/.c/}
147
148 .for _firmw in ${FIRMWS}
149 ${_firmw:C/\:.*$/.fwo/}:        ${_firmw:C/\:.*$//}
150         @${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
151         @if [ -e ${_firmw:C/\:.*$//} ]; then                    \
152                 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS}  \
153                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
154         else                                                    \
155                 ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \
156                 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS}  \
157                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
158                 rm ${_firmw:C/\:.*$//};                         \
159         fi
160
161 OBJS+=  ${_firmw:C/\:.*$/.fwo/}
162 .endfor
163 .endif
164
165 # Conditionally include SRCS based on kernel config options.
166 .for _o in ${KERN_OPTS}
167 SRCS+=${SRCS.${_o}}
168 .endfor
169
170 OBJS+=  ${SRCS:N*.h:R:S/$/.o/g}
171
172 .if !defined(PROG)
173 PROG=   ${KMOD}.ko
174 .endif
175
176 .if !defined(DEBUG_FLAGS)
177 FULLPROG=       ${PROG}
178 .else
179 FULLPROG=       ${PROG}.full
180 ${PROG}: ${FULLPROG} ${PROG}.debug
181         ${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.debug \
182             ${FULLPROG} ${.TARGET}
183 ${PROG}.debug: ${FULLPROG}
184         ${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
185 .endif
186
187 .if ${__KLD_SHARED} == yes
188 ${FULLPROG}: ${KMOD}.kld
189 .if ${MACHINE_CPUARCH} != "aarch64"
190         ${LD} -Bshareable ${_LDFLAGS} -o ${.TARGET} ${KMOD}.kld
191 .else
192 #XXXKIB Relocatable linking in aarch64 ld from binutils 2.25.1 does
193 #       not work.  The linker corrupts the references to the external
194 #       symbols which are defined by other object in the linking set
195 #       and should therefore loose the GOT entry.  The problem seems
196 #       to be fixed in the binutils-gdb git HEAD as of 2015-10-04.  Hack
197 #       below allows to get partially functioning modules for now.
198         ${LD} -Bshareable ${_LDFLAGS} -o ${.TARGET} ${OBJS}
199 .endif
200 .if !defined(DEBUG_FLAGS)
201         ${OBJCOPY} --strip-debug ${.TARGET}
202 .endif
203 .endif
204
205 EXPORT_SYMS?=   NO
206 .if ${EXPORT_SYMS} != YES
207 CLEANFILES+=    export_syms
208 .endif
209
210 .if ${__KLD_SHARED} == yes
211 ${KMOD}.kld: ${OBJS}
212 .else
213 ${FULLPROG}: ${OBJS}
214 .endif
215         ${LD} ${_LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
216 .if ${MK_CTF} != "no"
217         ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${OBJS}
218 .endif
219 .if defined(EXPORT_SYMS)
220 .if ${EXPORT_SYMS} != YES
221 .if ${EXPORT_SYMS} == NO
222         :> export_syms
223 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
224         echo ${EXPORT_SYMS} > export_syms
225 .else
226         grep -v '^#' < ${EXPORT_SYMS} > export_syms
227 .endif
228         awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
229             export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
230 .endif
231 .endif
232 .if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no
233         ${OBJCOPY} --strip-debug ${.TARGET}
234 .endif
235
236 _ILINKS=machine
237 .if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64"
238 _ILINKS+=${MACHINE_CPUARCH}
239 .endif
240 .if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
241 _ILINKS+=x86
242 .endif
243 CLEANFILES+=${_ILINKS}
244
245 all: objwarn ${PROG}
246
247 beforedepend: ${_ILINKS}
248
249 # Ensure that the links exist without depending on it when it exists which
250 # causes all the modules to be rebuilt when the directory pointed to changes.
251 .for _link in ${_ILINKS}
252 .if !exists(${.OBJDIR}/${_link})
253 ${OBJS}: ${_link}
254 .endif
255 .endfor
256
257 # Search for kernel source tree in standard places.
258 .for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
259 .if !defined(SYSDIR) && exists(${_dir}/kern/)
260 SYSDIR= ${_dir}
261 .endif
262 .endfor
263 .if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
264 .error "can't find kernel source tree"
265 .endif
266
267 .NOPATH: ${_ILINKS}
268
269 ${_ILINKS}:
270         @case ${.TARGET} in \
271         machine) \
272                 path=${SYSDIR}/${MACHINE}/include ;; \
273         *) \
274                 path=${SYSDIR}/${.TARGET:T}/include ;; \
275         esac ; \
276         path=`(cd $$path && /bin/pwd)` ; \
277         ${ECHO} ${.TARGET:T} "->" $$path ; \
278         ln -sf $$path ${.TARGET:T}
279
280 CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
281
282 .if defined(DEBUG_FLAGS)
283 CLEANFILES+= ${FULLPROG} ${PROG}.debug
284 .endif
285
286 .if !target(install)
287
288 _INSTALLFLAGS:= ${INSTALLFLAGS}
289 .for ie in ${INSTALLFLAGS_EDIT}
290 _INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
291 .endfor
292
293 .if !target(realinstall)
294 KERN_DEBUGDIR?= ${DEBUGDIR}
295 realinstall: _kmodinstall
296 .ORDER: beforeinstall _kmodinstall
297 _kmodinstall:
298         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
299             ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}/
300 .if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
301         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
302             ${_INSTALLFLAGS} ${PROG}.debug ${DESTDIR}${KERN_DEBUGDIR}${KMODDIR}/
303 .endif
304
305 .include <bsd.links.mk>
306
307 .if !defined(NO_XREF)
308 afterinstall: _kldxref
309 .ORDER: realinstall _kldxref
310 .ORDER: _installlinks _kldxref
311 _kldxref:
312         @if type kldxref >/dev/null 2>&1; then \
313                 ${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
314                 kldxref ${DESTDIR}${KMODDIR}; \
315         fi
316 .endif
317 .endif # !target(realinstall)
318
319 .endif # !target(install)
320
321 .if !target(load)
322 load: ${PROG}
323         ${KMODLOAD} -v ${.OBJDIR}/${PROG}
324 .endif
325
326 .if !target(unload)
327 unload:
328         ${KMODUNLOAD} -v ${PROG}
329 .endif
330
331 .if defined(KERNBUILDDIR)
332 .PATH: ${KERNBUILDDIR}
333 CFLAGS+=        -I${KERNBUILDDIR}
334 .for _src in ${SRCS:Mopt_*.h}
335 CLEANFILES+=    ${_src}
336 .if !target(${_src})
337 ${_src}:
338         ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
339 .endif
340 .endfor
341 .else
342 .for _src in ${SRCS:Mopt_*.h}
343 CLEANFILES+=    ${_src}
344 .if !target(${_src})
345 ${_src}:
346         :> ${.TARGET}
347 .endif
348 .endfor
349 .endif
350
351 # Respect configuration-specific C flags.
352 CFLAGS+=        ${CONF_CFLAGS}
353
354 .if !empty(SRCS:Mvnode_if.c)
355 CLEANFILES+=    vnode_if.c
356 vnode_if.c: ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src
357         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -c
358 .endif
359
360 .if !empty(SRCS:Mvnode_if.h)
361 CLEANFILES+=    vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
362 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: ${SYSDIR}/tools/vnode_if.awk \
363     ${SYSDIR}/kern/vnode_if.src
364 vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
365         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -h
366 vnode_if_newproto.h:
367         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -p
368 vnode_if_typedef.h:
369         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -q
370 .endif
371
372 # Build _if.[ch] from _if.m, and clean them when we're done.
373 .if !defined(_MPATH)
374 __MPATH!=find ${SYSDIR:tA}/ -name \*_if.m
375 _MPATH=${__MPATH:H:O:u}
376 .endif
377 .PATH.m: ${_MPATH}
378 .for _i in ${SRCS:M*_if.[ch]}
379 #removes too much, comment out until it's more constrained.
380 #CLEANFILES+=   ${_i}
381 .endfor # _i
382 .m.c:   ${SYSDIR}/tools/makeobjops.awk
383         ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -c
384
385 .m.h:   ${SYSDIR}/tools/makeobjops.awk
386         ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -h
387
388 .for _i in mii pccard
389 .if !empty(SRCS:M${_i}devs.h)
390 CLEANFILES+=    ${_i}devs.h
391 ${_i}devs.h: ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
392         ${AWK} -f ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
393 .endif
394 .endfor # _i
395
396 .if !empty(SRCS:Musbdevs.h)
397 CLEANFILES+=    usbdevs.h
398 usbdevs.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
399         ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -h
400 .endif
401
402 .if !empty(SRCS:Musbdevs_data.h)
403 CLEANFILES+=    usbdevs_data.h
404 usbdevs_data.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
405         ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -d
406 .endif
407
408 .if !empty(SRCS:Macpi_quirks.h)
409 CLEANFILES+=    acpi_quirks.h
410 acpi_quirks.h: ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
411         ${AWK} -f ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
412 .endif
413
414 .if !empty(SRCS:Massym.s)
415 CLEANFILES+=    assym.s genassym.o
416 assym.s: genassym.o
417 .if defined(KERNBUILDDIR)
418 genassym.o: opt_global.h
419 .endif
420 assym.s: ${SYSDIR}/kern/genassym.sh
421         sh ${SYSDIR}/kern/genassym.sh genassym.o > ${.TARGET}
422 genassym.o: ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
423 genassym.o: ${SRCS:Mopt_*.h}
424         ${CC} -c ${CFLAGS:N-fno-common} \
425             ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
426 .endif
427
428 lint: ${SRCS}
429         ${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
430
431 .if defined(KERNBUILDDIR)
432 ${OBJS}: opt_global.h
433 .endif
434
435 .include <bsd.dep.mk>
436
437 cleandepend: cleanilinks
438 # .depend needs include links so we remove them only together.
439 cleanilinks:
440         rm -f ${_ILINKS}
441
442 .if !exists(${.OBJDIR}/${DEPENDFILE})
443 ${OBJS}: ${SRCS:M*.h}
444 .endif
445
446 .include <bsd.obj.mk>
447 .include "kern.mk"