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