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# KMODISLOADED Command to check whether a kernel module is 32# loaded [/sbin/kldstat -q -n] 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# KERNBUILDDIR 48# Set to the location of the kernel build directory where 49# the opt_*.h files, .o's and kernel winds up. 50# 51# +++ targets +++ 52# 53# install: 54# install the kernel module; if the Makefile 55# does not itself define the target install, the targets 56# beforeinstall and afterinstall may also be used to cause 57# actions immediately before and after the install target 58# is executed. 59# 60# load: 61# Load a module. 62# 63# unload: 64# Unload a module. 65# 66# reload: 67# Unload if loaded, then load. 68# 69 70AWK?= awk 71KMODLOAD?= /sbin/kldload 72KMODUNLOAD?= /sbin/kldunload 73KMODISLOADED?= /sbin/kldstat -q -n 74OBJCOPY?= objcopy 75 76.include <bsd.init.mk> 77# Grab all the options for a kernel build. For backwards compat, we need to 78# do this after bsd.own.mk. 79.include "kern.opts.mk" 80.include <bsd.compiler.mk> 81.include "config.mk" 82 83# Search for kernel source tree in standard places. 84.if empty(KERNBUILDDIR) 85.if !defined(SYSDIR) 86.for _dir in ${SRCTOP:D${SRCTOP}/sys} \ 87 ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys 88.if !defined(SYSDIR) && exists(${_dir}/kern/) 89SYSDIR= ${_dir:tA} 90.endif 91.endfor 92.endif 93.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/) 94.error "can't find kernel source tree" 95.endif 96.endif 97 98.SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S .m 99 100# amd64 and mips use direct linking for kmod, all others use shared binaries 101.if ${MACHINE_CPUARCH} != amd64 && ${MACHINE_CPUARCH} != mips 102__KLD_SHARED=yes 103.else 104__KLD_SHARED=no 105.endif 106 107.if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing) 108CFLAGS+= -fno-strict-aliasing 109.endif 110.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} < 50000 111WERROR?= -Wno-error 112.else 113WERROR?= -Werror 114.endif 115 116CFLAGS+= ${WERROR} 117CFLAGS+= -D_KERNEL 118CFLAGS+= -DKLD_MODULE 119.if defined(MODULE_TIED) 120CFLAGS+= -DKLD_TIED 121.endif 122 123# Don't use any standard or source-relative include directories. 124NOSTDINC= -nostdinc 125CFLAGS:= ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*} 126.if defined(KERNBUILDDIR) 127CFLAGS+= -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h 128.endif 129 130# Add -I paths for system headers. Individual module makefiles don't 131# need any -I paths for this. Similar defaults for .PATH can't be 132# set because there are no standard paths for non-headers. 133CFLAGS+= -I. -I${SYSDIR} -I${SYSDIR}/contrib/ck/include 134 135CFLAGS.gcc+= -finline-limit=${INLINE_LIMIT} 136CFLAGS.gcc+= -fms-extensions 137CFLAGS.gcc+= --param inline-unit-growth=100 138CFLAGS.gcc+= --param large-function-growth=1000 139 140# Disallow common variables, and if we end up with commons from 141# somewhere unexpected, allocate storage for them in the module itself. 142CFLAGS+= -fno-common 143LDFLAGS+= -d -warn-common 144 145.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id} 146LDFLAGS+= --build-id=sha1 147.endif 148 149CFLAGS+= ${DEBUG_FLAGS} 150.if ${MACHINE_CPUARCH} == amd64 151CFLAGS+= -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer 152.endif 153 154.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "riscv" 155CFLAGS+= -fPIC 156.endif 157 158# Temporary workaround for PR 196407, which contains the fascinating details. 159# Don't allow clang to use fpu instructions or registers in kernel modules. 160.if ${MACHINE_CPUARCH} == arm 161.if ${COMPILER_VERSION} < 30800 162CFLAGS.clang+= -mllvm -arm-use-movt=0 163.else 164CFLAGS.clang+= -mno-movt 165.endif 166CFLAGS.clang+= -mfpu=none 167CFLAGS+= -funwind-tables 168.endif 169 170.if ${MACHINE_CPUARCH} == powerpc 171CFLAGS+= -mlongcall -fno-omit-frame-pointer 172.endif 173 174.if ${MACHINE_CPUARCH} == mips 175CFLAGS+= -G0 -fno-pic -mno-abicalls -mlong-calls 176.endif 177 178.if defined(DEBUG) || defined(DEBUG_FLAGS) 179CTFFLAGS+= -g 180.endif 181 182.if defined(FIRMWS) 183${KMOD:S/$/.c/}: ${SYSDIR}/tools/fw_stub.awk 184 ${AWK} -f ${SYSDIR}/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \ 185 ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE} 186 187SRCS+= ${KMOD:S/$/.c/} 188CLEANFILES+= ${KMOD:S/$/.c/} 189 190.for _firmw in ${FIRMWS} 191${_firmw:C/\:.*$/.fwo/:T}: ${_firmw:C/\:.*$//} 192 @${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}} 193 @if [ -e ${_firmw:C/\:.*$//} ]; then \ 194 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS} \ 195 -m ${LD_EMULATION} -r -d \ 196 -o ${.TARGET} ${_firmw:C/\:.*$//}; \ 197 else \ 198 ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \ 199 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS} \ 200 -m ${LD_EMULATION} -r -d \ 201 -o ${.TARGET} ${_firmw:C/\:.*$//}; \ 202 rm ${_firmw:C/\:.*$//}; \ 203 fi 204 205OBJS+= ${_firmw:C/\:.*$/.fwo/:T} 206.endfor 207.endif 208 209# Conditionally include SRCS based on kernel config options. 210.for _o in ${KERN_OPTS} 211SRCS+=${SRCS.${_o}} 212.endfor 213 214OBJS+= ${SRCS:N*.h:R:S/$/.o/g} 215 216.if !defined(PROG) 217PROG= ${KMOD}.ko 218.endif 219 220.if !defined(DEBUG_FLAGS) 221FULLPROG= ${PROG} 222.else 223FULLPROG= ${PROG}.full 224${PROG}: ${FULLPROG} ${PROG}.debug 225 ${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.debug \ 226 ${FULLPROG} ${.TARGET} 227${PROG}.debug: ${FULLPROG} 228 ${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET} 229.endif 230 231.if ${__KLD_SHARED} == yes 232${FULLPROG}: ${KMOD}.kld 233 ${LD} -m ${LD_EMULATION} -Bshareable -znotext -znorelro ${_LDFLAGS} \ 234 -o ${.TARGET} ${KMOD}.kld 235.if !defined(DEBUG_FLAGS) 236 ${OBJCOPY} --strip-debug ${.TARGET} 237.endif 238.endif 239 240EXPORT_SYMS?= NO 241.if ${EXPORT_SYMS} != YES 242CLEANFILES+= export_syms 243.endif 244 245.if !defined(FIRMWS) && exists(${SYSDIR}/conf/ldscript.kmod.${MACHINE_ARCH}) 246_LDFLAGS+=-T ${SYSDIR}/conf/ldscript.kmod.${MACHINE_ARCH} 247.endif 248 249.if ${__KLD_SHARED} == yes 250${KMOD}.kld: ${OBJS} 251.else 252${FULLPROG}: ${OBJS} 253.endif 254 ${LD} -m ${LD_EMULATION} ${_LDFLAGS} -r -d -o ${.TARGET} ${OBJS} 255.if ${MK_CTF} != "no" 256 ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${OBJS} 257.endif 258.if defined(EXPORT_SYMS) 259.if ${EXPORT_SYMS} != YES 260.if ${EXPORT_SYMS} == NO 261 :> export_syms 262.elif !exists(${.CURDIR}/${EXPORT_SYMS}) 263 echo -n "${EXPORT_SYMS:@s@$s${.newline}@}" > export_syms 264.else 265 grep -v '^#' < ${EXPORT_SYMS} > export_syms 266.endif 267 ${AWK} -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \ 268 export_syms | xargs -J% ${OBJCOPY} % ${.TARGET} 269.endif 270.endif # defined(EXPORT_SYMS) 271.if defined(PREFIX_SYMS) 272 ${AWK} -v prefix=${PREFIX_SYMS} -f ${SYSDIR}/conf/kmod_syms_prefix.awk \ 273 ${.TARGET} /dev/null | xargs -J% ${OBJCOPY} % ${.TARGET} 274.endif 275.if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no 276 ${OBJCOPY} --strip-debug ${.TARGET} 277.endif 278 279.if ${COMPILER_TYPE} == "clang" || \ 280 (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60000) 281_MAP_DEBUG_PREFIX= yes 282.endif 283 284_ILINKS=machine 285.if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64" 286_ILINKS+=${MACHINE_CPUARCH} 287.endif 288.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64" 289_ILINKS+=x86 290.endif 291CLEANFILES+=${_ILINKS} 292 293all: ${PROG} 294 295beforedepend: ${_ILINKS} 296beforebuild: ${_ILINKS} 297 298# Ensure that the links exist without depending on it when it exists which 299# causes all the modules to be rebuilt when the directory pointed to changes. 300# Ensure that debug info references the path in the source tree. 301.for _link in ${_ILINKS} 302.if !exists(${.OBJDIR}/${_link}) 303OBJS_DEPEND_GUESS+= ${_link} 304.endif 305.if defined(_MAP_DEBUG_PREFIX) 306.if ${_link} == "machine" 307CFLAGS+= -fdebug-prefix-map=./machine=${SYSDIR}/${MACHINE}/include 308.else 309CFLAGS+= -fdebug-prefix-map=./${_link}=${SYSDIR}/${_link}/include 310.endif 311.endif 312.endfor 313 314.NOPATH: ${_ILINKS} 315 316${_ILINKS}: 317 @case ${.TARGET} in \ 318 machine) \ 319 path=${SYSDIR}/${MACHINE}/include ;; \ 320 *) \ 321 path=${SYSDIR}/${.TARGET:T}/include ;; \ 322 esac ; \ 323 path=`(cd $$path && /bin/pwd)` ; \ 324 ${ECHO} ${.TARGET:T} "->" $$path ; \ 325 ln -fns $$path ${.TARGET:T} 326 327CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS} 328 329.if defined(DEBUG_FLAGS) 330CLEANFILES+= ${FULLPROG} ${PROG}.debug 331.endif 332 333.if !target(install) 334 335_INSTALLFLAGS:= ${INSTALLFLAGS} 336.for ie in ${INSTALLFLAGS_EDIT} 337_INSTALLFLAGS:= ${_INSTALLFLAGS${ie}} 338.endfor 339 340.if !target(realinstall) 341KERN_DEBUGDIR?= ${DEBUGDIR} 342realinstall: _kmodinstall 343.ORDER: beforeinstall _kmodinstall 344_kmodinstall: .PHONY 345 ${INSTALL} -T release -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \ 346 ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}/ 347.if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no" 348 ${INSTALL} -T debug -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \ 349 ${_INSTALLFLAGS} ${PROG}.debug ${DESTDIR}${KERN_DEBUGDIR}${KMODDIR}/ 350.endif 351 352.include <bsd.links.mk> 353 354.if !defined(NO_XREF) 355afterinstall: _kldxref 356.ORDER: realinstall _kldxref 357.ORDER: _installlinks _kldxref 358_kldxref: .PHONY 359 @if type kldxref >/dev/null 2>&1; then \ 360 ${ECHO} ${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \ 361 ${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \ 362 fi 363.endif 364.endif # !target(realinstall) 365 366.endif # !target(install) 367 368.if !target(load) 369load: ${PROG} .PHONY 370 ${KMODLOAD} -v ${.OBJDIR}/${PROG} 371.endif 372 373.if !target(unload) 374unload: .PHONY 375 if ${KMODISLOADED} ${PROG} ; then ${KMODUNLOAD} -v ${PROG} ; fi 376.endif 377 378.if !target(reload) 379reload: unload load .PHONY 380.endif 381 382.if defined(KERNBUILDDIR) 383.PATH: ${KERNBUILDDIR} 384CFLAGS+= -I${KERNBUILDDIR} 385.for _src in ${SRCS:Mopt_*.h} 386CLEANFILES+= ${_src} 387.if !target(${_src}) 388${_src}: 389 ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET} 390.endif 391.endfor 392.else 393.for _src in ${SRCS:Mopt_*.h} 394CLEANFILES+= ${_src} 395.if !target(${_src}) 396${_src}: 397 :> ${.TARGET} 398.endif 399.endfor 400.endif 401 402# Add the sanitizer C flags 403CFLAGS+= ${SAN_CFLAGS} 404 405# Add the gcov flags 406CFLAGS+= ${GCOV_CFLAGS} 407 408# Respect configuration-specific C flags. 409CFLAGS+= ${ARCH_FLAGS} ${CONF_CFLAGS} 410 411.if !empty(SRCS:Mvnode_if.c) 412CLEANFILES+= vnode_if.c 413vnode_if.c: ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src 414 ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -c 415.endif 416 417.if !empty(SRCS:Mvnode_if.h) 418CLEANFILES+= vnode_if.h vnode_if_newproto.h vnode_if_typedef.h 419vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: ${SYSDIR}/tools/vnode_if.awk \ 420 ${SYSDIR}/kern/vnode_if.src 421vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h 422 ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -h 423vnode_if_newproto.h: 424 ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -p 425vnode_if_typedef.h: 426 ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -q 427.endif 428 429# Build _if.[ch] from _if.m, and clean them when we're done. 430# __MPATH defined in config.mk 431_MFILES=${__MPATH:T:O} 432_MPATH=${__MPATH:H:O:u} 433.PATH.m: ${_MPATH} 434.for _i in ${SRCS:M*_if.[ch]} 435_MATCH=M${_i:R:S/$/.m/} 436_MATCHES=${_MFILES:${_MATCH}} 437.if !empty(_MATCHES) 438CLEANFILES+= ${_i} 439.endif 440.endfor # _i 441.m.c: ${SYSDIR}/tools/makeobjops.awk 442 ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -c 443 444.m.h: ${SYSDIR}/tools/makeobjops.awk 445 ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -h 446 447.for _i in mii pccard 448.if !empty(SRCS:M${_i}devs.h) 449CLEANFILES+= ${_i}devs.h 450${_i}devs.h: ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs 451 ${AWK} -f ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs 452.endif 453.endfor # _i 454 455.if !empty(SRCS:Mbhnd_nvram_map.h) 456CLEANFILES+= bhnd_nvram_map.h 457bhnd_nvram_map.h: ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.awk \ 458 ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \ 459 ${SYSDIR}/dev/bhnd/nvram/nvram_map 460bhnd_nvram_map.h: 461 sh ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \ 462 ${SYSDIR}/dev/bhnd/nvram/nvram_map -h 463.endif 464 465.if !empty(SRCS:Mbhnd_nvram_map_data.h) 466CLEANFILES+= bhnd_nvram_map_data.h 467bhnd_nvram_map_data.h: ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.awk \ 468 ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \ 469 ${SYSDIR}/dev/bhnd/nvram/nvram_map 470bhnd_nvram_map_data.h: 471 sh ${SYSDIR}/dev/bhnd/tools/nvram_map_gen.sh \ 472 ${SYSDIR}/dev/bhnd/nvram/nvram_map -d 473.endif 474 475.if !empty(SRCS:Musbdevs.h) 476CLEANFILES+= usbdevs.h 477usbdevs.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs 478 ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -h 479.endif 480 481.if !empty(SRCS:Musbdevs_data.h) 482CLEANFILES+= usbdevs_data.h 483usbdevs_data.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs 484 ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -d 485.endif 486 487.if !empty(SRCS:Msdiodevs.h) 488CLEANFILES+= sdiodevs.h 489sdiodevs.h: ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs 490 ${AWK} -f ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs -h 491.endif 492 493.if !empty(SRCS:Msdiodevs_data.h) 494CLEANFILES+= sdiodevs_data.h 495sdiodevs_data.h: ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs 496 ${AWK} -f ${SYSDIR}/tools/sdiodevs2h.awk ${SYSDIR}/dev/sdio/sdiodevs -d 497.endif 498 499.if !empty(SRCS:Macpi_quirks.h) 500CLEANFILES+= acpi_quirks.h 501acpi_quirks.h: ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks 502 ${AWK} -f ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks 503.endif 504 505.if !empty(SRCS:Massym.inc) || !empty(DPSRCS:Massym.inc) 506CLEANFILES+= assym.inc genassym.o 507DEPENDOBJS+= genassym.o 508DPSRCS+= offset.inc 509.endif 510.if defined(MODULE_TIED) 511DPSRCS+= offset.inc 512.endif 513.if !empty(SRCS:Moffset.inc) || !empty(DPSRCS:Moffset.inc) 514CLEANFILES+= offset.inc genoffset.o 515DEPENDOBJS+= genoffset.o 516.endif 517assym.inc: genassym.o 518offset.inc: genoffset.o 519assym.inc: ${SYSDIR}/kern/genassym.sh 520 sh ${SYSDIR}/kern/genassym.sh genassym.o > ${.TARGET} 521genassym.o: ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c offset.inc 522genassym.o: ${SRCS:Mopt_*.h} 523 ${CC} -c ${CFLAGS:N-flto:N-fno-common} \ 524 ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c 525offset.inc: ${SYSDIR}/kern/genoffset.sh genoffset.o 526 sh ${SYSDIR}/kern/genoffset.sh genoffset.o > ${.TARGET} 527genoffset.o: ${SYSDIR}/kern/genoffset.c 528genoffset.o: ${SRCS:Mopt_*.h} 529 ${CC} -c ${CFLAGS:N-flto:N-fno-common} \ 530 ${SYSDIR}/kern/genoffset.c 531 532CLEANDEPENDFILES+= ${_ILINKS} 533# .depend needs include links so we remove them only together. 534cleanilinks: 535 rm -f ${_ILINKS} 536 537OBJS_DEPEND_GUESS+= ${SRCS:M*.h} 538.if defined(KERNBUILDDIR) 539OBJS_DEPEND_GUESS+= opt_global.h 540.endif 541 542.include <bsd.dep.mk> 543.include <bsd.clang-analyze.mk> 544.include <bsd.obj.mk> 545.include "kern.mk" 546