sys/conf/kern.pre.mk

   1 # $FreeBSD$
   2
   3 # Part of a unified Makefile for building kernels.  This part contains all
   4 # of the definitions that need to be before %BEFORE_DEPEND.
   5
   6 # Allow user to configure things that only effect src tree builds.
   7 # Note: This is duplicated from src.sys.mk to ensure that we include
   8 # /etc/src.conf when building the kernel. Kernels can be built without
   9 # the rest of /usr/src, but they still always process SRCCONF even though
  10 # the normal mechanisms to prevent that (compiling out of tree) won't
  11 # work. To ensure they do work, we have to duplicate thee few lines here.
  12 SRCCONF?=       /etc/src.conf
  13 .if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
  14 .include "${SRCCONF}"
  15 _srcconf_included_:
  16 .endif
  17
  18 .include <bsd.own.mk>
  19 .include <bsd.compiler.mk>
  20 .include "kern.opts.mk"
  21
  22 # The kernel build always occurs in the object directory which is .CURDIR.
  23 .if ${.MAKE.MODE:Unormal:Mmeta}
  24 .MAKE.MODE+=    curdirOk=yes
  25 .endif
  26
  27 # The kernel build always expects .OBJDIR=.CURDIR.
  28 .OBJDIR: ${.CURDIR}
  29
  30 .if defined(NO_OBJWALK) || ${MK_AUTO_OBJ} == "yes"
  31 NO_OBJWALK=             t
  32 NO_MODULES_OBJ= t
  33 .endif
  34 .if !defined(NO_OBJWALK)
  35 _obj=           obj
  36 .endif
  37
  38 # Can be overridden by makeoptions or /etc/make.conf
  39 KERNEL_KO?=     kernel
  40 KERNEL?=        kernel
  41 KODIR?=         /boot/${KERNEL}
  42 LDSCRIPT_NAME?= ldscript.$M
  43 LDSCRIPT?=      $S/conf/${LDSCRIPT_NAME}
  44
  45 M=              ${MACHINE}
  46
  47 AWK?=           awk
  48 CP?=            cp
  49 NM?=            nm
  50 OBJCOPY?=       objcopy
  51 SIZE?=          size
  52
  53 .if defined(DEBUG)
  54 _MINUS_O=       -O
  55 CTFFLAGS+=      -g
  56 .else
  57 .if ${MACHINE_CPUARCH} == "powerpc"
  58 _MINUS_O=       -O      # gcc miscompiles some code at -O2
  59 .else
  60 _MINUS_O=       -O2
  61 .endif
  62 .endif
  63 .if ${MACHINE_CPUARCH} == "amd64"
  64 .if ${COMPILER_TYPE} == "clang"
  65 COPTFLAGS?=-O2 -pipe
  66 .else
  67 COPTFLAGS?=-O2 -frename-registers -pipe
  68 .endif
  69 .else
  70 COPTFLAGS?=${_MINUS_O} -pipe
  71 .endif
  72 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
  73 COPTFLAGS+= -fno-strict-aliasing
  74 .endif
  75 .if !defined(NO_CPU_COPTFLAGS)
  76 COPTFLAGS+= ${_CPUCFLAGS}
  77 .endif
  78 NOSTDINC= -nostdinc
  79
  80 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
  81
  82 CFLAGS= ${COPTFLAGS} ${DEBUG}
  83 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
  84 CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
  85 CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
  86 .if ${MACHINE_CPUARCH} == "mips"
  87 CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
  88 .endif
  89 CFLAGS.gcc+= -fms-extensions -finline-limit=${INLINE_LIMIT}
  90 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
  91 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
  92 CFLAGS.gcc+= -fms-extensions
  93 .if defined(CFLAGS_ARCH_PARAMS)
  94 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
  95 .endif
  96 WERROR?=        -Werror
  97 # The following should be removed no earlier than LLVM11 being imported into the
  98 # tree, to ensure we don't regress the build.  LLVM11 and GCC10 will switch the
  99 # default over to -fno-common, making this redundant.
 100 CFLAGS+=        -fno-common
 101
 102 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
 103 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
 104
 105 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
 106 CFLAGS+=        -DGPROF
 107 CFLAGS.gcc+=    -falign-functions=16
 108 .if ${PROFLEVEL} >= 2
 109 CFLAGS+=        -DGPROF4 -DGUPROF
 110 PROF=           -pg
 111 .if ${COMPILER_TYPE} == "gcc"
 112 PROF+=          -mprofiler-epilogue
 113 .endif
 114 .else
 115 PROF=           -pg
 116 .endif
 117 .endif
 118 DEFINED_PROF=   ${PROF}
 119
 120 KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
 121 .if !empty(KCSAN_ENABLED)
 122 SAN_CFLAGS+=    -fsanitize=thread
 123 .endif
 124
 125 KUBSAN_ENABLED!=        grep KUBSAN opt_global.h || true ; echo
 126 .if !empty(KUBSAN_ENABLED)
 127 SAN_CFLAGS+=    -fsanitize=undefined
 128 .endif
 129
 130 COVERAGE_ENABLED!=      grep COVERAGE opt_global.h || true ; echo
 131 .if !empty(COVERAGE_ENABLED)
 132 .if ${COMPILER_TYPE} == "clang" || \
 133     (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
 134 SAN_CFLAGS+=    -fsanitize-coverage=trace-pc,trace-cmp
 135 .else
 136 SAN_CFLAGS+=    -fsanitize-coverage=trace-pc
 137 .endif
 138 .endif
 139
 140 CFLAGS+=        ${SAN_CFLAGS}
 141
 142 GCOV_ENABLED!=  grep GCOV opt_global.h || true ; echo
 143 .if !empty(GCOV_ENABLED)
 144 .if ${COMPILER_TYPE} == "gcc"
 145 GCOV_CFLAGS+=    -fprofile-arcs -ftest-coverage
 146 .endif
 147 .endif
 148
 149 CFLAGS+=        ${GCOV_CFLAGS}
 150
 151 # Put configuration-specific C flags last (except for ${PROF}) so that they
 152 # can override the others.
 153 CFLAGS+=        ${CONF_CFLAGS}
 154
 155 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
 156 LDFLAGS+=       --build-id=sha1
 157 .endif
 158
 159 .if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
 160     ${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
 161     defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
 162 .error amd64/arm64/i386/ppc* kernel requires linker ifunc support
 163 .endif
 164 .if ${MACHINE_CPUARCH} == "amd64"
 165 LDFLAGS+=       -z max-page-size=2097152
 166 .if ${LINKER_TYPE} != "lld"
 167 LDFLAGS+=       -z common-page-size=4096
 168 .else
 169 .if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
 170 .warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
 171 .else
 172 LDFLAGS+=       -z notext -z ifunc-noplt
 173 .endif
 174 .endif
 175 .endif  # ${MACHINE_CPUARCH} == "amd64"
 176
 177 .if ${MACHINE_CPUARCH} == "riscv"
 178 # Hack: Work around undefined weak symbols being out of range when linking with
 179 # LLD (address is a PC-relative calculation, and BFD works around this by
 180 # rewriting the instructions to generate an absolute address of 0); -fPIE
 181 # avoids this since it uses the GOT for all extern symbols, which is overly
 182 # inefficient for us. Drop once undefined weak symbols work with medany.
 183 .if ${LINKER_TYPE} == "lld"
 184 CFLAGS+=        -fPIE
 185 .endif
 186 .endif
 187
 188 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
 189 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 190 PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
 191 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
 192
 193 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
 194           ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
 195
 196 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
 197 NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
 198         -m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
 199
 200 # for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
 201 ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} -I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} -Wno-inline -Wno-missing-prototypes ${PROF} -U__BMI__ ${.IMPSRC}
 202 # https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
 203 # "Note that [GCC] autovectorization still does not do a good job on the
 204 # optimized version, so it's turned off via attribute and flag.  I found
 205 # that neither attribute nor command-line flag were entirely successful in
 206 # turning off vectorization, which is why there were both."
 207 .if ${COMPILER_TYPE} == "gcc"
 208 ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
 209 .endif
 210
 211 # Common for dtrace / zfs
 212 CDDL_CFLAGS=    -DFREEBSD_NAMECACHE -nostdinc -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S -I$S/cddl/contrib/opensolaris/common ${CFLAGS} -Wno-unknown-pragmas -Wno-missing-prototypes -Wno-undef -Wno-strict-prototypes -Wno-cast-qual -Wno-parentheses -Wno-redundant-decls -Wno-missing-braces -Wno-uninitialized -Wno-unused -Wno-inline -Wno-switch -Wno-pointer-arith -Wno-unknown-pragmas
 213 CDDL_CFLAGS+=   -include $S/cddl/compat/opensolaris/sys/debug_compat.h
 214 CDDL_C=         ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
 215
 216 # Special flags for managing the compat compiles for ZFS
 217 ZFS_CFLAGS=     -DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs
 218 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs/lua
 219 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/uts/common/zmod
 220 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/common/lz4
 221 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/common/zfs
 222 ZFS_CFLAGS+=    ${CDDL_CFLAGS}
 223 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
 224 ZFS_C=          ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
 225 ZFS_S=          ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 226
 227 # Special flags for managing the compat compiles for DTrace
 228 DTRACE_CFLAGS=  -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
 229 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
 230 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
 231 .endif
 232 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
 233 DTRACE_ASM_CFLAGS=      -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
 234 DTRACE_C=       ${CC} -c ${DTRACE_CFLAGS}       ${WERROR} ${PROF} ${.IMPSRC}
 235 DTRACE_S=       ${CC} -c ${DTRACE_ASM_CFLAGS}   ${WERROR} ${.IMPSRC}
 236
 237 # Special flags for managing the compat compiles for DTrace/FBT
 238 FBT_CFLAGS=     -DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S ${CDDL_CFLAGS}
 239 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
 240 FBT_CFLAGS+=    -I$S/cddl/dev/fbt/x86
 241 .endif
 242 FBT_C=          ${CC} -c ${FBT_CFLAGS}          ${WERROR} ${PROF} ${.IMPSRC}
 243
 244 .if ${MK_CTF} != "no"
 245 NORMAL_CTFCONVERT=      ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
 246 .elif ${MAKE_VERSION} >= 5201111300
 247 NORMAL_CTFCONVERT=
 248 .else
 249 NORMAL_CTFCONVERT=      @:
 250 .endif
 251
 252 # Linux Kernel Programming Interface C-flags
 253 LINUXKPI_INCLUDES=      -I$S/compat/linuxkpi/common/include
 254 LINUXKPI_C=             ${NORMAL_C} ${LINUXKPI_INCLUDES}
 255
 256 # Infiniband C flags.  Correct include paths and omit errors that linux
 257 # does not honor.
 258 OFEDINCLUDES=   -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
 259 OFEDNOERR=      -Wno-cast-qual -Wno-pointer-arith
 260 OFEDCFLAGS=     ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
 261                 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
 262 OFED_C_NOIMP=   ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
 263 OFED_C=         ${OFED_C_NOIMP} ${.IMPSRC}
 264
 265 # mlxfw C flags.
 266 MLXFW_C=        ${OFED_C_NOIMP} \
 267                 -I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
 268                 -I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
 269                 ${.IMPSRC}
 270
 271 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
 272 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
 273 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
 274 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
 275 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
 276 SYSTEM_OBJS+= hack.pico
 277
 278 KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
 279 KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
 280
 281 MD_ROOT_SIZE_CONFIGURED!=       grep MD_ROOT_SIZE opt_md.h || true ; echo
 282 .if ${MFS_IMAGE:Uno} != "no"
 283 .if empty(MD_ROOT_SIZE_CONFIGURED)
 284 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
 285 .endif
 286 .endif
 287 SYSTEM_LD_BASECMD= \
 288         ${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
 289         --no-warn-mismatch --warn-common --export-dynamic \
 290         --dynamic-linker /red/herring -X
 291 SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
 292 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
 293         ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
 294 SYSTEM_DEP+= ${LDSCRIPT}
 295
 296 # Calculate path for .m files early, if needed.
 297 .if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
 298     (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
 299 __MPATH!=find ${S:tA}/ -name \*_if.m
 300 .endif
 301
 302 # MKMODULESENV is set here so that port makefiles can augment
 303 # them.
 304
 305 MKMODULESENV+=  MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
 306 MKMODULESENV+=  MACHINE_CPUARCH=${MACHINE_CPUARCH}
 307 MKMODULESENV+=  MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
 308 MKMODULESENV+=  MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
 309 MKMODULESENV+=  ARCH_FLAGS="${ARCH_FLAGS}"
 310 .if (${KERN_IDENT} == LINT)
 311 MKMODULESENV+=  ALL_MODULES=LINT
 312 .endif
 313 .if defined(MODULES_OVERRIDE)
 314 MKMODULESENV+=  MODULES_OVERRIDE="${MODULES_OVERRIDE}"
 315 .endif
 316 .if defined(DEBUG)
 317 MKMODULESENV+=  DEBUG_FLAGS="${DEBUG}"
 318 .endif
 319 .if !defined(NO_MODULES)
 320 MKMODULESENV+=  __MPATH="${__MPATH}"
 321 .endif
 322
 323 # Architecture and output format arguments for objcopy to convert image to
 324 # object file
 325
 326 .if ${MFS_IMAGE:Uno} != "no"
 327 .if empty(MD_ROOT_SIZE_CONFIGURED)
 328 .if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
 329 EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
 330 .if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
 331 .undef EMBEDFS_FORMAT.${MACHINE_ARCH}
 332 .endif
 333 .endif
 334
 335 .if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
 336 EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
 337 .if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
 338 .undef EMBEDFS_ARCH.${MACHINE_ARCH}
 339 .endif
 340 .endif
 341
 342 EMBEDFS_FORMAT.arm?=            elf32-littlearm
 343 EMBEDFS_FORMAT.armv6?=          elf32-littlearm
 344 EMBEDFS_FORMAT.armv7?=          elf32-littlearm
 345 EMBEDFS_FORMAT.aarch64?=        elf64-littleaarch64
 346 EMBEDFS_FORMAT.mips?=           elf32-tradbigmips
 347 EMBEDFS_FORMAT.mipsel?=         elf32-tradlittlemips
 348 EMBEDFS_FORMAT.mips64?=         elf64-tradbigmips
 349 EMBEDFS_FORMAT.mips64el?=       elf64-tradlittlemips
 350 EMBEDFS_FORMAT.riscv64?=        elf64-littleriscv
 351 .endif
 352 .endif
 353
 354 # Detect kernel config options that force stack frames to be turned on.
 355 DDB_ENABLED!=   grep DDB opt_ddb.h || true ; echo
 356 DTR_ENABLED!=   grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
 357 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo