The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/conf/kmod.mk

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    1 #       From: @(#)bsd.prog.mk   5.26 (Berkeley) 6/25/91
    2 # $FreeBSD: releng/8.2/sys/conf/kmod.mk 215938 2010-11-27 12:26:40Z jchandra $
    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 
   63 AWK?=           awk
   64 KMODLOAD?=      /sbin/kldload
   65 KMODUNLOAD?=    /sbin/kldunload
   66 OBJCOPY?=       objcopy
   67 
   68 .if defined(KMODDEPS)
   69 .error "Do not use KMODDEPS on 5.0+; use MODULE_VERSION/MODULE_DEPEND"
   70 .endif
   71 
   72 .include <bsd.init.mk>
   73 
   74 .SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S
   75 
   76 .if ${CC} == "icc"
   77 CFLAGS:=        ${CFLAGS:C/(-x[^M^K^W]+)[MKW]+|-x[MKW]+/\1/}
   78 .else
   79 . if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
   80 CFLAGS+=        -fno-strict-aliasing
   81 . endif
   82 WERROR?=        -Werror
   83 .endif
   84 CFLAGS+=        ${WERROR}
   85 CFLAGS+=        -D_KERNEL
   86 CFLAGS+=        -DKLD_MODULE
   87 
   88 # Don't use any standard or source-relative include directories.
   89 .if ${CC} == "icc"
   90 NOSTDINC=       -X
   91 .else
   92 CSTD=           c99
   93 NOSTDINC=       -nostdinc
   94 .endif
   95 CFLAGS:=        ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
   96 .if defined(KERNBUILDDIR)
   97 CFLAGS+=        -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
   98 .endif
   99 
  100 # Add -I paths for system headers.  Individual module makefiles don't
  101 # need any -I paths for this.  Similar defaults for .PATH can't be
  102 # set because there are no standard paths for non-headers.
  103 CFLAGS+=        -I. -I@
  104 
  105 # Add -I path for altq headers as they are included via net/if_var.h
  106 # for example.
  107 CFLAGS+=        -I@/contrib/altq
  108 
  109 .if ${CC} != "icc"
  110 CFLAGS+=        -finline-limit=${INLINE_LIMIT}
  111 CFLAGS+= --param inline-unit-growth=100
  112 CFLAGS+= --param large-function-growth=1000
  113 .endif
  114 
  115 # Disallow common variables, and if we end up with commons from
  116 # somewhere unexpected, allocate storage for them in the module itself.
  117 .if ${CC} != "icc"
  118 CFLAGS+=        -fno-common
  119 .endif
  120 LDFLAGS+=       -d -warn-common
  121 
  122 CFLAGS+=        ${DEBUG_FLAGS}
  123 .if ${MACHINE_ARCH} == amd64
  124 CFLAGS+=        -fno-omit-frame-pointer
  125 .endif
  126 
  127 .if ${MACHINE_ARCH} == "powerpc"
  128 CFLAGS+=        -mlongcall -fno-omit-frame-pointer
  129 .endif
  130 
  131 .if ${MACHINE_ARCH} == "mips"
  132 CFLAGS+=        -G0 -fno-pic -mno-abicalls -mlong-calls
  133 .endif
  134 
  135 .if defined(FIRMWS)
  136 .if !exists(@)
  137 ${KMOD:S/$/.c/}: @
  138 .else
  139 ${KMOD:S/$/.c/}: @/tools/fw_stub.awk
  140 .endif
  141         ${AWK} -f @/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
  142             ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
  143 
  144 SRCS+=  ${KMOD:S/$/.c/}
  145 CLEANFILES+=    ${KMOD:S/$/.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 
  160 OBJS+=  ${_firmw:C/\:.*$/.fwo/}
  161 .endfor
  162 .endif
  163 
  164 OBJS+=  ${SRCS:N*.h:R:S/$/.o/g}
  165 
  166 .if !defined(PROG)
  167 PROG=   ${KMOD}.ko
  168 .endif
  169 
  170 .if !defined(DEBUG_FLAGS)
  171 FULLPROG=       ${PROG}
  172 .else
  173 FULLPROG=       ${PROG}.debug
  174 ${PROG}: ${FULLPROG} ${PROG}.symbols
  175         ${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.symbols\
  176             ${FULLPROG} ${.TARGET}
  177 ${PROG}.symbols: ${FULLPROG}
  178         ${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
  179 .endif
  180 
  181 .if ${MACHINE_ARCH} != amd64 && ${MACHINE_ARCH} != mips
  182 ${FULLPROG}: ${KMOD}.kld
  183         ${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} ${KMOD}.kld
  184 .if !defined(DEBUG_FLAGS)
  185         ${OBJCOPY} --strip-debug ${.TARGET}
  186 .endif
  187 .endif
  188 
  189 EXPORT_SYMS?=   NO
  190 .if ${EXPORT_SYMS} != YES
  191 CLEANFILES+=    export_syms
  192 .endif
  193 
  194 .if ${MACHINE_ARCH} != amd64 && ${MACHINE_ARCH} != mips
  195 ${KMOD}.kld: ${OBJS}
  196 .else
  197 ${FULLPROG}: ${OBJS}
  198 .endif
  199         ${LD} ${LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
  200 .if defined(EXPORT_SYMS)
  201 .if ${EXPORT_SYMS} != YES
  202 .if ${EXPORT_SYMS} == NO
  203         :> export_syms
  204 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
  205         echo ${EXPORT_SYMS} > export_syms
  206 .else
  207         grep -v '^#' < ${EXPORT_SYMS} > export_syms
  208 .endif
  209         awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
  210             export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
  211 .endif
  212 .endif
  213 .if !defined(DEBUG_FLAGS) && \
  214     (${MACHINE_ARCH} == amd64 || ${MACHINE_ARCH} == mips)
  215         ${OBJCOPY} --strip-debug ${.TARGET}
  216 .endif
  217 
  218 _ILINKS=@ machine
  219 .if ${MACHINE} != ${MACHINE_ARCH}
  220 _ILINKS+=${MACHINE_ARCH}
  221 .endif
  222 
  223 all: objwarn ${PROG}
  224 
  225 beforedepend: ${_ILINKS}
  226 
  227 # Ensure that the links exist without depending on it when it exists which
  228 # causes all the modules to be rebuilt when the directory pointed to changes.
  229 .for _link in ${_ILINKS}
  230 .if !exists(${.OBJDIR}/${_link})
  231 ${OBJS}: ${_link}
  232 .endif
  233 .endfor
  234 
  235 # Search for kernel source tree in standard places.
  236 .for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
  237 .if !defined(SYSDIR) && exists(${_dir}/kern/)
  238 SYSDIR= ${_dir}
  239 .endif
  240 .endfor
  241 .if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
  242 .error "can't find kernel source tree"
  243 .endif
  244 
  245 ${_ILINKS}:
  246         @case ${.TARGET} in \
  247         ${MACHINE_ARCH}) \
  248                 path=${SYSDIR}/${MACHINE_ARCH}/include ;; \
  249         machine) \
  250                 path=${SYSDIR}/${MACHINE}/include ;; \
  251         @) \
  252                 path=${SYSDIR} ;; \
  253         esac ; \
  254         path=`(cd $$path && /bin/pwd)` ; \
  255         ${ECHO} ${.TARGET} "->" $$path ; \
  256         ln -sf $$path ${.TARGET}
  257 
  258 CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
  259 
  260 .if defined(DEBUG_FLAGS)
  261 CLEANFILES+= ${FULLPROG} ${PROG}.symbols
  262 .endif
  263 
  264 .if !target(install)
  265 
  266 _INSTALLFLAGS:= ${INSTALLFLAGS}
  267 .for ie in ${INSTALLFLAGS_EDIT}
  268 _INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
  269 .endfor
  270 
  271 .if !target(realinstall)
  272 realinstall: _kmodinstall
  273 .ORDER: beforeinstall _kmodinstall
  274 _kmodinstall:
  275         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
  276             ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}
  277 .if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG)
  278         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
  279             ${_INSTALLFLAGS} ${PROG}.symbols ${DESTDIR}${KMODDIR}
  280 .endif
  281 
  282 .include <bsd.links.mk>
  283 
  284 .if !defined(NO_XREF)
  285 afterinstall: _kldxref
  286 .ORDER: realinstall _kldxref
  287 .ORDER: _installlinks _kldxref
  288 _kldxref:
  289         @if type kldxref >/dev/null 2>&1; then \
  290                 ${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
  291                 kldxref ${DESTDIR}${KMODDIR}; \
  292         fi
  293 .endif
  294 .endif # !target(realinstall)
  295 
  296 .endif # !target(install)
  297 
  298 .if !target(load)
  299 load: ${PROG}
  300         ${KMODLOAD} -v ${.OBJDIR}/${PROG}
  301 .endif
  302 
  303 .if !target(unload)
  304 unload:
  305         ${KMODUNLOAD} -v ${PROG}
  306 .endif
  307 
  308 .if defined(KERNBUILDDIR)
  309 .PATH: ${KERNBUILDDIR}
  310 CFLAGS+=        -I${KERNBUILDDIR}
  311 .for _src in ${SRCS:Mopt_*.h}
  312 CLEANFILES+=    ${_src}
  313 .if !target(${_src})
  314 ${_src}:
  315         ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
  316 .endif
  317 .endfor
  318 .else
  319 .for _src in ${SRCS:Mopt_*.h}
  320 CLEANFILES+=    ${_src}
  321 .if !target(${_src})
  322 ${_src}:
  323         :> ${.TARGET}
  324 .endif
  325 .endfor
  326 .endif
  327 
  328 MFILES?= dev/acpica/acpi_if.m dev/acpi_support/acpi_wmi_if.m \
  329         dev/agp/agp_if.m dev/ata/ata_if.m dev/eisa/eisa_if.m \
  330         dev/iicbus/iicbb_if.m dev/iicbus/iicbus_if.m \
  331         dev/mmc/mmcbr_if.m dev/mmc/mmcbus_if.m \
  332         dev/mii/miibus_if.m dev/mvs/mvs_if.m dev/ofw/ofw_bus_if.m \
  333         dev/pccard/card_if.m dev/pccard/power_if.m dev/pci/pci_if.m \
  334         dev/pci/pcib_if.m dev/ppbus/ppbus_if.m dev/smbus/smbus_if.m \
  335         dev/sound/pcm/ac97_if.m dev/sound/pcm/channel_if.m \
  336         dev/sound/pcm/feeder_if.m dev/sound/pcm/mixer_if.m \
  337         dev/sound/midi/mpu_if.m dev/sound/midi/mpufoi_if.m \
  338         dev/sound/midi/synth_if.m dev/usb/usb_if.m isa/isa_if.m \
  339         kern/bus_if.m kern/clock_if.m \
  340         kern/cpufreq_if.m kern/device_if.m kern/serdev_if.m \
  341         libkern/iconv_converter_if.m opencrypto/cryptodev_if.m \
  342         pc98/pc98/canbus_if.m
  343 
  344 .for _srcsrc in ${MFILES}
  345 .for _ext in c h
  346 .for _src in ${SRCS:M${_srcsrc:T:R}.${_ext}}
  347 CLEANFILES+=    ${_src}
  348 .if !target(${_src})
  349 .if !exists(@)
  350 ${_src}: @
  351 .else
  352 ${_src}: @/tools/makeobjops.awk @/${_srcsrc}
  353 .endif
  354         ${AWK} -f @/tools/makeobjops.awk @/${_srcsrc} -${_ext}
  355 .endif
  356 .endfor # _src
  357 .endfor # _ext
  358 .endfor # _srcsrc
  359 
  360 .if !empty(SRCS:Mvnode_if.c)
  361 CLEANFILES+=    vnode_if.c
  362 .if !exists(@)
  363 vnode_if.c: @
  364 .else
  365 vnode_if.c: @/tools/vnode_if.awk @/kern/vnode_if.src
  366 .endif
  367         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -c
  368 .endif
  369 
  370 .if !empty(SRCS:Mvnode_if.h)
  371 CLEANFILES+=    vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
  372 .if !exists(@)
  373 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: @
  374 .else
  375 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: @/tools/vnode_if.awk \
  376     @/kern/vnode_if.src
  377 .endif
  378 vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
  379         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -h
  380 vnode_if_newproto.h:
  381         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -p
  382 vnode_if_typedef.h:
  383         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -q
  384 .endif
  385 
  386 .for _i in mii pccard
  387 .if !empty(SRCS:M${_i}devs.h)
  388 CLEANFILES+=    ${_i}devs.h
  389 .if !exists(@)
  390 ${_i}devs.h: @
  391 .else
  392 ${_i}devs.h: @/tools/${_i}devs2h.awk @/dev/${_i}/${_i}devs
  393 .endif
  394         ${AWK} -f @/tools/${_i}devs2h.awk @/dev/${_i}/${_i}devs
  395 .endif
  396 .endfor # _i
  397 
  398 .if !empty(SRCS:Musbdevs.h)
  399 CLEANFILES+=    usbdevs.h
  400 .if !exists(@)
  401 usbdevs.h: @
  402 .else
  403 usbdevs.h: @/tools/usbdevs2h.awk @/dev/usb/usbdevs
  404 .endif
  405         ${AWK} -f @/tools/usbdevs2h.awk @/dev/usb/usbdevs -h
  406 .endif
  407 
  408 .if !empty(SRCS:Musbdevs_data.h)
  409 CLEANFILES+=    usbdevs_data.h
  410 .if !exists(@)
  411 usbdevs_data.h: @
  412 .else
  413 usbdevs_data.h: @/tools/usbdevs2h.awk @/dev/usb/usbdevs
  414 .endif
  415         ${AWK} -f @/tools/usbdevs2h.awk @/dev/usb/usbdevs -d
  416 .endif
  417 
  418 .if !empty(SRCS:Macpi_quirks.h)
  419 CLEANFILES+=    acpi_quirks.h
  420 .if !exists(@)
  421 acpi_quirks.h: @
  422 .else
  423 acpi_quirks.h: @/tools/acpi_quirks2h.awk @/dev/acpica/acpi_quirks
  424 .endif
  425         ${AWK} -f @/tools/acpi_quirks2h.awk @/dev/acpica/acpi_quirks
  426 .endif
  427 
  428 .if !empty(SRCS:Massym.s)
  429 CLEANFILES+=    assym.s genassym.o
  430 assym.s: genassym.o
  431 .if defined(KERNBUILDDIR)
  432 genassym.o: opt_global.h
  433 .endif
  434 .if !exists(@)
  435 assym.s: @
  436 .else
  437 assym.s: @/kern/genassym.sh
  438 .endif
  439         sh @/kern/genassym.sh genassym.o > ${.TARGET}
  440 .if exists(@)
  441 genassym.o: @/${MACHINE_ARCH}/${MACHINE_ARCH}/genassym.c
  442 .endif
  443 genassym.o: @ machine ${SRCS:Mopt_*.h}
  444         ${CC} -c ${CFLAGS:N-fno-common} \
  445             @/${MACHINE_ARCH}/${MACHINE_ARCH}/genassym.c
  446 .endif
  447 
  448 lint: ${SRCS}
  449         ${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
  450 
  451 .if defined(KERNBUILDDIR)
  452 ${OBJS}: opt_global.h
  453 .endif
  454 
  455 .include <bsd.dep.mk>
  456 
  457 cleandepend: cleanilinks
  458 # .depend needs include links so we remove them only together.
  459 cleanilinks:
  460         rm -f ${_ILINKS}
  461 
  462 .if !exists(${.OBJDIR}/${DEPENDFILE})
  463 ${OBJS}: ${SRCS:M*.h}
  464 .endif
  465 
  466 .include <bsd.obj.mk>
  467 .include "kern.mk"

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