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 # $FreeBSD$
    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 C_DIALECT=      -std=c99
   93 NOSTDINC=       -nostdinc
   94 .endif
   95 CFLAGS+=        ${C_DIALECT}
   96 CFLAGS:=        ${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
   97 .if defined(KERNBUILDDIR)
   98 CFLAGS+=        -DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
   99 .endif
  100 
  101 # Add -I paths for system headers.  Individual module makefiles don't
  102 # need any -I paths for this.  Similar defaults for .PATH can't be
  103 # set because there are no standard paths for non-headers.
  104 CFLAGS+=        -I. -I@
  105 
  106 # Add -I path for altq headers as they are included via net/if_var.h
  107 # for example.
  108 CFLAGS+=        -I@/contrib/altq
  109 
  110 .if ${CC} != "icc"
  111 CFLAGS+=        -finline-limit=${INLINE_LIMIT}
  112 CFLAGS+= --param inline-unit-growth=100
  113 CFLAGS+= --param large-function-growth=1000
  114 .endif
  115 
  116 # Disallow common variables, and if we end up with commons from
  117 # somewhere unexpected, allocate storage for them in the module itself.
  118 .if ${CC} != "icc"
  119 CFLAGS+=        -fno-common
  120 .endif
  121 LDFLAGS+=       -d -warn-common
  122 
  123 CFLAGS+=        ${DEBUG_FLAGS}
  124 .if ${MACHINE_ARCH} == amd64
  125 CFLAGS+=        -fno-omit-frame-pointer
  126 .endif
  127 
  128 .if ${MACHINE_ARCH} == "powerpc"
  129 CFLAGS+=        -mlongcall -fno-omit-frame-pointer
  130 .endif
  131 
  132 .if defined(FIRMWS)
  133 .if !exists(@)
  134 ${KMOD:S/$/.c/}: @
  135 .else
  136 ${KMOD:S/$/.c/}: @/tools/fw_stub.awk
  137 .endif
  138         ${AWK} -f @/tools/fw_stub.awk ${FIRMWS} -m${KMOD} -c${KMOD:S/$/.c/g} \
  139             ${FIRMWARE_LICENSE:C/.+/-l/}${FIRMWARE_LICENSE}
  140 
  141 SRCS+=  ${KMOD:S/$/.c/}
  142 CLEANFILES+=    ${KMOD:S/$/.c/}
  143 
  144 .for _firmw in ${FIRMWS}
  145 ${_firmw:C/\:.*$/.fwo/}:        ${_firmw:C/\:.*$//}
  146         @${ECHO} ${_firmw:C/\:.*$//} ${.ALLSRC:M*${_firmw:C/\:.*$//}}
  147         @if [ -e ${_firmw:C/\:.*$//} ]; then                    \
  148                 ${LD} -b binary --no-warn-mismatch ${LDFLAGS}   \
  149                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
  150         else                                                    \
  151                 ln -s ${.ALLSRC:M*${_firmw:C/\:.*$//}} ${_firmw:C/\:.*$//}; \
  152                 ${LD} -b binary --no-warn-mismatch ${LDFLAGS}   \
  153                     -r -d -o ${.TARGET} ${_firmw:C/\:.*$//};    \
  154                 rm ${_firmw:C/\:.*$//};                         \
  155         fi
  156 
  157 OBJS+=  ${_firmw:C/\:.*$/.fwo/}
  158 .endfor
  159 .endif
  160 
  161 OBJS+=  ${SRCS:N*.h:R:S/$/.o/g}
  162 
  163 .if !defined(PROG)
  164 PROG=   ${KMOD}.ko
  165 .endif
  166 
  167 .if !defined(DEBUG_FLAGS)
  168 FULLPROG=       ${PROG}
  169 .else
  170 FULLPROG=       ${PROG}.debug
  171 ${PROG}: ${FULLPROG} ${PROG}.symbols
  172         ${OBJCOPY} --strip-debug --add-gnu-debuglink=${PROG}.symbols\
  173             ${FULLPROG} ${.TARGET}
  174 ${PROG}.symbols: ${FULLPROG}
  175         ${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
  176 .endif
  177 
  178 .if ${MACHINE_ARCH} != amd64
  179 ${FULLPROG}: ${KMOD}.kld
  180         ${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} ${KMOD}.kld
  181 .if !defined(DEBUG_FLAGS)
  182         ${OBJCOPY} --strip-debug ${.TARGET}
  183 .endif
  184 .endif
  185 
  186 EXPORT_SYMS?=   NO
  187 .if ${EXPORT_SYMS} != YES
  188 CLEANFILES+=    export_syms
  189 .endif
  190 
  191 .if ${MACHINE_ARCH} != amd64
  192 ${KMOD}.kld: ${OBJS}
  193 .else
  194 ${FULLPROG}: ${OBJS}
  195 .endif
  196         ${LD} ${LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
  197 .if defined(EXPORT_SYMS)
  198 .if ${EXPORT_SYMS} != YES
  199 .if ${EXPORT_SYMS} == NO
  200         :> export_syms
  201 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
  202         echo ${EXPORT_SYMS} > export_syms
  203 .else
  204         grep -v '^#' < ${EXPORT_SYMS} > export_syms
  205 .endif
  206         awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
  207             export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
  208 .endif
  209 .endif
  210 .if !defined(DEBUG_FLAGS) && ${MACHINE_ARCH} == amd64
  211         ${OBJCOPY} --strip-debug ${.TARGET}
  212 .endif
  213 
  214 _ILINKS=@ machine
  215 .if ${MACHINE} != ${MACHINE_ARCH}
  216 _ILINKS+=${MACHINE_ARCH}
  217 .endif
  218 
  219 all: objwarn ${PROG}
  220 
  221 beforedepend: ${_ILINKS}
  222 
  223 # Ensure that the links exist without depending on it when it exists which
  224 # causes all the modules to be rebuilt when the directory pointed to changes.
  225 .for _link in ${_ILINKS}
  226 .if !exists(${.OBJDIR}/${_link})
  227 ${OBJS}: ${_link}
  228 .endif
  229 .endfor
  230 
  231 # Search for kernel source tree in standard places.
  232 .for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
  233 .if !defined(SYSDIR) && exists(${_dir}/kern/)
  234 SYSDIR= ${_dir}
  235 .endif
  236 .endfor
  237 .if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
  238 .error "can't find kernel source tree"
  239 .endif
  240 
  241 ${_ILINKS}:
  242         @case ${.TARGET} in \
  243         ${MACHINE_ARCH}) \
  244                 path=${SYSDIR}/${MACHINE_ARCH}/include ;; \
  245         machine) \
  246                 path=${SYSDIR}/${MACHINE}/include ;; \
  247         @) \
  248                 path=${SYSDIR} ;; \
  249         esac ; \
  250         path=`(cd $$path && /bin/pwd)` ; \
  251         ${ECHO} ${.TARGET} "->" $$path ; \
  252         ln -sf $$path ${.TARGET}
  253 
  254 CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS}
  255 
  256 .if defined(DEBUG_FLAGS)
  257 CLEANFILES+= ${FULLPROG} ${PROG}.symbols
  258 .endif
  259 
  260 .if !target(install)
  261 
  262 _INSTALLFLAGS:= ${INSTALLFLAGS}
  263 .for ie in ${INSTALLFLAGS_EDIT}
  264 _INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
  265 .endfor
  266 
  267 .if !target(realinstall)
  268 realinstall: _kmodinstall
  269 .ORDER: beforeinstall _kmodinstall
  270 _kmodinstall:
  271         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
  272             ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}
  273 .if defined(DEBUG_FLAGS) && !defined(INSTALL_NODEBUG)
  274         ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
  275             ${_INSTALLFLAGS} ${PROG}.symbols ${DESTDIR}${KMODDIR}
  276 .endif
  277 
  278 .include <bsd.links.mk>
  279 
  280 .if !defined(NO_XREF)
  281 afterinstall: _kldxref
  282 .ORDER: realinstall _kldxref
  283 .ORDER: _installlinks _kldxref
  284 _kldxref:
  285         @if type kldxref >/dev/null 2>&1; then \
  286                 ${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
  287                 kldxref ${DESTDIR}${KMODDIR}; \
  288         fi
  289 .endif
  290 .endif # !target(realinstall)
  291 
  292 .endif # !target(install)
  293 
  294 .if !target(load)
  295 load: ${PROG}
  296         ${KMODLOAD} -v ${.OBJDIR}/${PROG}
  297 .endif
  298 
  299 .if !target(unload)
  300 unload:
  301         ${KMODUNLOAD} -v ${PROG}
  302 .endif
  303 
  304 .if defined(KERNBUILDDIR)
  305 .PATH: ${KERNBUILDDIR}
  306 CFLAGS+=        -I${KERNBUILDDIR}
  307 .for _src in ${SRCS:Mopt_*.h}
  308 CLEANFILES+=    ${_src}
  309 .if !target(${_src})
  310 ${_src}:
  311         ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
  312 .endif
  313 .endfor
  314 .else
  315 .for _src in ${SRCS:Mopt_*.h}
  316 CLEANFILES+=    ${_src}
  317 .if !target(${_src})
  318 ${_src}:
  319         :> ${.TARGET}
  320 .endif
  321 .endfor
  322 .endif
  323 
  324 MFILES?= dev/acpica/acpi_if.m dev/ata/ata_if.m dev/eisa/eisa_if.m \
  325         dev/iicbus/iicbb_if.m dev/iicbus/iicbus_if.m \
  326         dev/mmc/mmcbr_if.m dev/mmc/mmcbus_if.m \
  327         dev/mii/miibus_if.m dev/ofw/ofw_bus_if.m \
  328         dev/pccard/card_if.m dev/pccard/power_if.m dev/pci/pci_if.m \
  329         dev/pci/pcib_if.m dev/ppbus/ppbus_if.m dev/smbus/smbus_if.m \
  330         dev/sound/pcm/ac97_if.m dev/sound/pcm/channel_if.m \
  331         dev/sound/pcm/feeder_if.m dev/sound/pcm/mixer_if.m \
  332         dev/sound/midi/mpu_if.m dev/sound/midi/mpufoi_if.m \
  333         dev/sound/midi/synth_if.m dev/usb/usb_if.m isa/isa_if.m \
  334         kern/bus_if.m kern/cpufreq_if.m kern/device_if.m kern/serdev_if.m \
  335         libkern/iconv_converter_if.m opencrypto/cryptodev_if.m \
  336         pc98/pc98/canbus_if.m pci/agp_if.m
  337 
  338 .for _srcsrc in ${MFILES}
  339 .for _ext in c h
  340 .for _src in ${SRCS:M${_srcsrc:T:R}.${_ext}}
  341 CLEANFILES+=    ${_src}
  342 .if !target(${_src})
  343 .if !exists(@)
  344 ${_src}: @
  345 .else
  346 ${_src}: @/tools/makeobjops.awk @/${_srcsrc}
  347 .endif
  348         ${AWK} -f @/tools/makeobjops.awk @/${_srcsrc} -${_ext}
  349 .endif
  350 .endfor # _src
  351 .endfor # _ext
  352 .endfor # _srcsrc
  353 
  354 .if !empty(SRCS:Mvnode_if.c)
  355 CLEANFILES+=    vnode_if.c
  356 .if !exists(@)
  357 vnode_if.c: @
  358 .else
  359 vnode_if.c: @/tools/vnode_if.awk @/kern/vnode_if.src
  360 .endif
  361         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -c
  362 .endif
  363 
  364 .if !empty(SRCS:Mvnode_if.h)
  365 CLEANFILES+=    vnode_if.h vnode_if_newproto.h vnode_if_typedef.h
  366 .if !exists(@)
  367 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: @
  368 .else
  369 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: @/tools/vnode_if.awk \
  370     @/kern/vnode_if.src
  371 .endif
  372 vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
  373         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -h
  374 vnode_if_newproto.h:
  375         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -p
  376 vnode_if_typedef.h:
  377         ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -q
  378 .endif
  379 
  380 .for _i in mii pccard
  381 .if !empty(SRCS:M${_i}devs.h)
  382 CLEANFILES+=    ${_i}devs.h
  383 .if !exists(@)
  384 ${_i}devs.h: @
  385 .else
  386 ${_i}devs.h: @/tools/${_i}devs2h.awk @/dev/${_i}/${_i}devs
  387 .endif
  388         ${AWK} -f @/tools/${_i}devs2h.awk @/dev/${_i}/${_i}devs
  389 .endif
  390 .endfor # _i
  391 
  392 .if !empty(SRCS:Musbdevs.h)
  393 CLEANFILES+=    usbdevs.h
  394 .if !exists(@)
  395 usbdevs.h: @
  396 .else
  397 usbdevs.h: @/tools/usbdevs2h.awk @/dev/usb/usbdevs
  398 .endif
  399         ${AWK} -f @/tools/usbdevs2h.awk @/dev/usb/usbdevs -h
  400 .endif
  401 
  402 .if !empty(SRCS:Musbdevs_data.h)
  403 CLEANFILES+=    usbdevs_data.h
  404 .if !exists(@)
  405 usbdevs_data.h: @
  406 .else
  407 usbdevs_data.h: @/tools/usbdevs2h.awk @/dev/usb/usbdevs
  408 .endif
  409         ${AWK} -f @/tools/usbdevs2h.awk @/dev/usb/usbdevs -d
  410 .endif
  411 
  412 .if !empty(SRCS:Macpi_quirks.h)
  413 CLEANFILES+=    acpi_quirks.h
  414 .if !exists(@)
  415 acpi_quirks.h: @
  416 .else
  417 acpi_quirks.h: @/tools/acpi_quirks2h.awk @/dev/acpica/acpi_quirks
  418 .endif
  419         ${AWK} -f @/tools/acpi_quirks2h.awk @/dev/acpica/acpi_quirks
  420 .endif
  421 
  422 .if !empty(SRCS:Massym.s)
  423 CLEANFILES+=    assym.s genassym.o
  424 assym.s: genassym.o
  425 .if defined(KERNBUILDDIR)
  426 genassym.o: opt_global.h
  427 .endif
  428 .if !exists(@)
  429 assym.s: @
  430 .else
  431 assym.s: @/kern/genassym.sh
  432 .endif
  433         sh @/kern/genassym.sh genassym.o > ${.TARGET}
  434 .if exists(@)
  435 genassym.o: @/${MACHINE_ARCH}/${MACHINE_ARCH}/genassym.c
  436 .endif
  437 genassym.o: @ machine ${SRCS:Mopt_*.h}
  438         ${CC} -c ${CFLAGS:N-fno-common} \
  439             @/${MACHINE_ARCH}/${MACHINE_ARCH}/genassym.c
  440 .endif
  441 
  442 lint: ${SRCS}
  443         ${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
  444 
  445 .if defined(KERNBUILDDIR)
  446 ${OBJS}: opt_global.h
  447 .endif
  448 
  449 .include <bsd.dep.mk>
  450 
  451 cleandepend: cleanilinks
  452 # .depend needs include links so we remove them only together.
  453 cleanilinks:
  454         rm -f ${_ILINKS}
  455 
  456 .if !exists(${.OBJDIR}/${DEPENDFILE})
  457 ${OBJS}: ${SRCS:M*.h}
  458 .endif
  459 
  460 .include <bsd.obj.mk>
  461 .include "kern.mk"

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