sys/conf/kmod.mk

   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 <bsd.init.mk>
  73 # Grab all the options for a kernel build. For backwards compat, we need to
  74 # do this after bsd.own.mk.
  75 .include "kern.opts.mk"
  76 .include <bsd.compiler.mk>
  77 .include "config.mk"
  78
  79 .SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S .m
  80
  81 # amd64 and mips use direct linking for kmod, all others use shared binaries
  82 .if ${MACHINE_CPUARCH} != amd64 && ${MACHINE_CPUARCH} != mips
  83 __KLD_SHARED=yes
  84 .else
  85 __KLD_SHARED=no
  86 .endif
  87
  88 .if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
  89 CFLAGS+=        -fno-strict-aliasing
  90 .endif
  91 WERROR?=        -Werror
  92 CFLAGS+=        ${WERROR}
  93 CFLAGS+=        -D_KERNEL
  94 CFLAGS+=        -DKLD_MODULE
  95
  96 # Don't use any standard or source-relative include directories.
  97 NOSTDINC=       -nostdinc
  98 CFLAGS:=        ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
  99 .if defined(KERNBUILDDIR)
 100 CFLAGS+=        -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
 101 .endif
 102
 103 # Add -I paths for system headers.  Individual module makefiles don't
 104 # need any -I paths for this.  Similar defaults for .PATH can't be
 105 # set because there are no standard paths for non-headers.
 106 CFLAGS+=        -I. -I${SYSDIR}
 107
 108 CFLAGS.gcc+=    -finline-limit=${INLINE_LIMIT}
 109 CFLAGS.gcc+=    -fms-extensions
 110 CFLAGS.gcc+= --param inline-unit-growth=100
 111 CFLAGS.gcc+= --param large-function-growth=1000
 112
 113 # Disallow common variables, and if we end up with commons from
 114 # somewhere unexpected, allocate storage for them in the module itself.
 115 CFLAGS+=        -fno-common
 116 LDFLAGS+=       -d -warn-common
 117
 118 CFLAGS+=        ${DEBUG_FLAGS}
 119 .if ${MACHINE_CPUARCH} == amd64
 120 CFLAGS+=        -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
 121 .endif
 122
 123 .if ${MACHINE_CPUARCH} == "aarch64"
 124 CFLAGS+=        -fPIC
 125 .endif
 126
 127 # Temporary workaround for PR 196407, which contains the fascinating details.
 128 # Don't allow clang to use fpu instructions or registers in kernel modules.
 129 .if ${MACHINE_CPUARCH} == arm
 130 CFLAGS.clang+=  -mllvm -arm-use-movt=0
 131 CFLAGS.clang+=  -mfpu=none
 132 CFLAGS+=        -funwind-tables
 133 .endif
 134
 135 .if ${MACHINE_CPUARCH} == powerpc
 136 CFLAGS+=        -mlongcall -fno-omit-frame-pointer
 137 .endif
 138
 139 .if ${MACHINE_CPUARCH} == mips
 140 CFLAGS+=        -G0 -fno-pic -mno-abicalls -mlong-calls
 141 .endif
 142
 143 .if defined(DEBUG) || defined(DEBUG_FLAGS)
 144 CTFFLAGS+=      -g
 145 .endif
 146
 147 .if defined(FIRMWS)
 148 ${KMOD:S/$/.c/}: ${SYSDIR}/tools/fw_stub.awk
 149         ${AWK} -f ${SYSDIR}/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
 150             ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
 151
 152 SRCS+=  ${KMOD:S/$/.c/}
 153 CLEANFILES+=    ${KMOD:S/$/.c/}
 154
 155 .for _firmw in ${FIRMWS}
 156 ${_firmw:C/\:.*$/.fwo/}:        ${_firmw:C/\:.*$//}
 157         @${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
 158         @if [ -e ${_firmw:C/\:.*$//} ]; then                    \
 159                 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS}  \
 160                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
 161         else                                                    \
 162                 ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \
 163                 ${LD} -b binary --no-warn-mismatch ${_LDFLAGS}  \
 164                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
 165                 rm ${_firmw:C/\:.*$//};                         \
 166         fi
 167
 168 OBJS+=  ${_firmw:C/\:.*$/.fwo/}
 169 .endfor
 170 .endif
 171
 172 # Conditionally include SRCS based on kernel config options.
 173 .for _o in ${KERN_OPTS}
 174 SRCS+=${SRCS.${_o}}
 175 .endfor
 176
 177 OBJS+=  ${SRCS:N*.h:R:S/$/.o/g}
 178
 179 .if !defined(PROG)
 180 PROG=   ${KMOD}.ko
 181 .endif
 182
 183 .if !defined(DEBUG_FLAGS)
 184 FULLPROG=       ${PROG}
 185 .else
 186 FULLPROG=       ${PROG}.full
 187 ${PROG}: ${FULLPROG} ${PROG}.debug
 188         ${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.debug \
 189             ${FULLPROG} ${.TARGET}
 190 ${PROG}.debug: ${FULLPROG}
 191         ${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
 192 .endif
 193
 194 .if ${__KLD_SHARED} == yes
 195 ${FULLPROG}: ${KMOD}.kld
 196 .if ${MACHINE_CPUARCH} != "aarch64"
 197         ${LD} -Bshareable ${_LDFLAGS} -o ${.TARGET} ${KMOD}.kld
 198 .else
 199 #XXXKIB Relocatable linking in aarch64 ld from binutils 2.25.1 does
 200 #       not work.  The linker corrupts the references to the external
 201 #       symbols which are defined by other object in the linking set
 202 #       and should therefore loose the GOT entry.  The problem seems
 203 #       to be fixed in the binutils-gdb git HEAD as of 2015-10-04.  Hack
 204 #       below allows to get partially functioning modules for now.
 205         ${LD} -Bshareable ${_LDFLAGS} -o ${.TARGET} ${OBJS}
 206 .endif
 207 .if !defined(DEBUG_FLAGS)
 208         ${OBJCOPY} --strip-debug ${.TARGET}
 209 .endif
 210 .endif
 211
 212 EXPORT_SYMS?=   NO
 213 .if ${EXPORT_SYMS} != YES
 214 CLEANFILES+=    export_syms
 215 .endif
 216
 217 .if ${__KLD_SHARED} == yes
 218 ${KMOD}.kld: ${OBJS}
 219 .else
 220 ${FULLPROG}: ${OBJS}
 221 .endif
 222         ${LD} ${_LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
 223 .if ${MK_CTF} != "no"
 224         ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${OBJS}
 225 .endif
 226 .if defined(EXPORT_SYMS)
 227 .if ${EXPORT_SYMS} != YES
 228 .if ${EXPORT_SYMS} == NO
 229         :> export_syms
 230 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
 231         echo ${EXPORT_SYMS} > export_syms
 232 .else
 233         grep -v '^#' < ${EXPORT_SYMS} > export_syms
 234 .endif
 235         ${AWK} -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
 236             export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
 237 .endif
 238 .endif
 239 .if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no
 240         ${OBJCOPY} --strip-debug ${.TARGET}
 241 .endif
 242
 243 _ILINKS=machine
 244 .if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64"
 245 _ILINKS+=${MACHINE_CPUARCH}
 246 .endif
 247 .if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
 248 _ILINKS+=x86
 249 .endif
 250 CLEANFILES+=${_ILINKS}
 251
 252 all: ${PROG}
 253
 254 beforedepend: ${_ILINKS}
 255 beforebuild: ${_ILINKS}
 256
 257 # Ensure that the links exist without depending on it when it exists which
 258 # causes all the modules to be rebuilt when the directory pointed to changes.
 259 .for _link in ${_ILINKS}
 260 .if !exists(${.OBJDIR}/${_link})
 261 ${OBJS}: ${_link}
 262 .endif
 263 .endfor
 264
 265 # Search for kernel source tree in standard places.
 266 .for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
 267 .if !defined(SYSDIR) && exists(${_dir}/kern/)
 268 SYSDIR= ${_dir}
 269 .endif
 270 .endfor
 271 .if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
 272 .error "can't find kernel source tree"
 273 .endif
 274
 275 .NOPATH: ${_ILINKS}
 276
 277 ${_ILINKS}:
 278         @case ${.TARGET} in \
 279         machine) \
 280                 path=${SYSDIR}/${MACHINE}/include ;; \
 281         *) \
 282                 path=${SYSDIR}/${.TARGET:T}/include ;; \
 283         esac ; \
 284         path=`(cd $$path && /bin/pwd)` ; \
 285         ${ECHO} ${.TARGET:T} "->" $$path ; \
 286         ln -sf $$path ${.TARGET:T}
 287
 288 CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
 289
 290 .if defined(DEBUG_FLAGS)
 291 CLEANFILES+= ${FULLPROG} ${PROG}.debug
 292 .endif
 293
 294 .if !target(install)
 295
 296 _INSTALLFLAGS:= ${INSTALLFLAGS}
 297 .for ie in ${INSTALLFLAGS_EDIT}
 298 _INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
 299 .endfor
 300
 301 .if !target(realinstall)
 302 KERN_DEBUGDIR?= ${DEBUGDIR}
 303 realinstall: _kmodinstall
 304 .ORDER: beforeinstall _kmodinstall
 305 _kmodinstall:
 306         ${INSTALL} -T release -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
 307             ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}/
 308 .if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
 309         ${INSTALL} -T debug -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
 310             ${_INSTALLFLAGS} ${PROG}.debug ${DESTDIR}${KERN_DEBUGDIR}${KMODDIR}/
 311 .endif
 312
 313 .include <bsd.links.mk>
 314
 315 .if !defined(NO_XREF)
 316 afterinstall: _kldxref
 317 .ORDER: realinstall _kldxref
 318 .ORDER: _installlinks _kldxref
 319 _kldxref:
 320         @if type kldxref >/dev/null 2>&1; then \
 321                 ${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
 322                 kldxref ${DESTDIR}${KMODDIR}; \
 323         fi
 324 .endif
 325 .endif # !target(realinstall)
 326
 327 .endif # !target(install)
 328
 329 .if !target(load)
 330 load: ${PROG}
 331         ${KMODLOAD} -v ${.OBJDIR}/${PROG}
 332 .endif
 333
 334 .if !target(unload)
 335 unload:
 336         if ${KMODISLOADED} ${PROG} ; then ${KMODUNLOAD} -v ${PROG} ; fi
 337 .endif
 338
 339 .if !target(reload)
 340 reload: unload load
 341 .endif
 342
 343 .if defined(KERNBUILDDIR)
 344 .PATH: ${KERNBUILDDIR}
 345 CFLAGS+=        -I${KERNBUILDDIR}
 346 .for _src in ${SRCS:Mopt_*.h}
 347 CLEANFILES+=    ${_src}
 348 .if !target(${_src})
 349 ${_src}:
 350         ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
 351 .endif
 352 .endfor
 353 .else
 354 .for _src in ${SRCS:Mopt_*.h}
 355 CLEANFILES+=    ${_src}
 356 .if !target(${_src})
 357 ${_src}:
 358         :> ${.TARGET}
 359 .endif
 360 .endfor
 361 .endif
 362
 363 # Respect configuration-specific C flags.
 364 CFLAGS+=        ${CONF_CFLAGS}
 365
 366 .if !empty(SRCS:Mvnode_if.c)
 367 CLEANFILES+=    vnode_if.c
 368 vnode_if.c: ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src
 369         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -c
 370 .endif
 371
 372 .if !empty(SRCS:Mvnode_if.h)
 373 CLEANFILES+=    vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
 374 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: ${SYSDIR}/tools/vnode_if.awk \
 375     ${SYSDIR}/kern/vnode_if.src
 376 vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
 377         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -h
 378 vnode_if_newproto.h:
 379         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -p
 380 vnode_if_typedef.h:
 381         ${AWK} -f ${SYSDIR}/tools/vnode_if.awk ${SYSDIR}/kern/vnode_if.src -q
 382 .endif
 383
 384 # Build _if.[ch] from _if.m, and clean them when we're done.
 385 # This is duplicated in sys/modules/Makefile.
 386 .if !defined(__MPATH)
 387 __MPATH!=find ${SYSDIR:tA}/ -name \*_if.m
 388 .export __MPATH
 389 .endif
 390 _MFILES=${__MPATH:T:O}
 391 _MPATH=${__MPATH:H:O:u}
 392 .PATH.m: ${_MPATH}
 393 .for _i in ${SRCS:M*_if.[ch]}
 394 _MATCH=M${_i:R:S/$/.m/}
 395 _MATCHES=${_MFILES:${_MATCH}}
 396 .if !empty(_MATCHES)
 397 CLEANFILES+=    ${_i}
 398 .endif
 399 .endfor # _i
 400 .m.c:   ${SYSDIR}/tools/makeobjops.awk
 401         ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -c
 402
 403 .m.h:   ${SYSDIR}/tools/makeobjops.awk
 404         ${AWK} -f ${SYSDIR}/tools/makeobjops.awk ${.IMPSRC} -h
 405
 406 .for _i in mii pccard
 407 .if !empty(SRCS:M${_i}devs.h)
 408 CLEANFILES+=    ${_i}devs.h
 409 ${_i}devs.h: ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
 410         ${AWK} -f ${SYSDIR}/tools/${_i}devs2h.awk ${SYSDIR}/dev/${_i}/${_i}devs
 411 .endif
 412 .endfor # _i
 413
 414 .if !empty(SRCS:Musbdevs.h)
 415 CLEANFILES+=    usbdevs.h
 416 usbdevs.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
 417         ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -h
 418 .endif
 419
 420 .if !empty(SRCS:Musbdevs_data.h)
 421 CLEANFILES+=    usbdevs_data.h
 422 usbdevs_data.h: ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs
 423         ${AWK} -f ${SYSDIR}/tools/usbdevs2h.awk ${SYSDIR}/dev/usb/usbdevs -d
 424 .endif
 425
 426 .if !empty(SRCS:Macpi_quirks.h)
 427 CLEANFILES+=    acpi_quirks.h
 428 acpi_quirks.h: ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
 429         ${AWK} -f ${SYSDIR}/tools/acpi_quirks2h.awk ${SYSDIR}/dev/acpica/acpi_quirks
 430 .endif
 431
 432 .if !empty(SRCS:Massym.s)
 433 CLEANFILES+=    assym.s genassym.o
 434 assym.s: genassym.o
 435 .if defined(KERNBUILDDIR)
 436 genassym.o: opt_global.h
 437 .endif
 438 assym.s: ${SYSDIR}/kern/genassym.sh
 439         sh ${SYSDIR}/kern/genassym.sh genassym.o > ${.TARGET}
 440 genassym.o: ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
 441 genassym.o: ${SRCS:Mopt_*.h}
 442         ${CC} -c ${CFLAGS:N-fno-common} \
 443             ${SYSDIR}/${MACHINE}/${MACHINE}/genassym.c
 444 .endif
 445
 446 lint: ${SRCS}
 447         ${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
 448
 449 .if defined(KERNBUILDDIR)
 450 ${OBJS}: opt_global.h
 451 .endif
 452
 453 CLEANDEPENDFILES+=      ${_ILINKS}
 454 # .depend needs include links so we remove them only together.
 455 cleanilinks:
 456         rm -f ${_ILINKS}
 457
 458 OBJS_DEPEND_GUESS+= ${SRCS:M*.h}
 459 .if ${MK_FAST_DEPEND} == "no" && !exists(${.OBJDIR}/${DEPENDFILE})
 460 ${OBJS}: ${OBJS_DEPEND_GUESS}
 461 .endif
 462
 463 .include <bsd.dep.mk>
 464 .include <bsd.clang-analyze.mk>
 465 .include <bsd.obj.mk>
 466 .include "kern.mk"