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 ELFDUMP?=       elfdump
  50 NM?=            nm
  51 OBJCOPY?=       objcopy
  52 SIZE?=          size
  53
  54 .if defined(DEBUG)
  55 CTFFLAGS+=      -g
  56 .endif
  57 .if ${MACHINE_CPUARCH} == "amd64" && ${COMPILER_TYPE} != "clang"
  58 _COPTFLAGS_EXTRA=-frename-registers
  59 .else
  60 _COPTFLAGS_EXTRA=
  61 .endif
  62 COPTFLAGS?=-O2 -pipe ${_COPTFLAGS_EXTRA}
  63 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
  64 COPTFLAGS+= -fno-strict-aliasing
  65 .endif
  66 .if !defined(NO_CPU_COPTFLAGS)
  67 COPTFLAGS+= ${_CPUCFLAGS}
  68 .endif
  69 NOSTDINC= -nostdinc
  70
  71 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
  72
  73 CFLAGS= ${COPTFLAGS} ${DEBUG}
  74 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
  75 CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
  76 CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
  77 CFLAGS.gcc+= -fms-extensions -finline-limit=${INLINE_LIMIT}
  78 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
  79 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
  80 CFLAGS.gcc+= -fms-extensions
  81 .if defined(CFLAGS_ARCH_PARAMS)
  82 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
  83 .endif
  84 WERROR?=        -Werror
  85 # The following should be removed no earlier than LLVM11 being imported into the
  86 # tree, to ensure we don't regress the build.  LLVM11 and GCC10 will switch the
  87 # default over to -fno-common, making this redundant.
  88 CFLAGS+=        -fno-common
  89
  90 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
  91 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
  92
  93 COMPAT_FREEBSD32_ENABLED!= grep COMPAT_FREEBSD32 opt_global.h || true ; echo
  94
  95 KASAN_ENABLED!= grep KASAN opt_global.h || true ; echo
  96 .if !empty(KASAN_ENABLED)
  97 SAN_CFLAGS+=    -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kasan \
  98                 -fsanitize=kernel-address \
  99                 -mllvm -asan-stack=true \
 100                 -mllvm -asan-instrument-dynamic-allocas=true \
 101                 -mllvm -asan-globals=true \
 102                 -mllvm -asan-use-after-scope=true \
 103                 -mllvm -asan-instrumentation-with-call-threshold=0 \
 104                 -mllvm -asan-instrument-byval=false
 105
 106 .if ${MACHINE_CPUARCH} == "aarch64"
 107 # KASAN/ARM64 TODO: -asan-mapping-offset is calculated from:
 108 #          (VM_KERNEL_MIN_ADDRESS >> KASAN_SHADOW_SCALE_SHIFT) + $offset = KASAN_MIN_ADDRESS
 109 #
 110 #       This is different than amd64, where we have a different
 111 #       KASAN_MIN_ADDRESS, and this offset value should eventually be
 112 #       upstreamed similar to: https://reviews.llvm.org/D98285
 113 #
 114 SAN_CFLAGS+=    -mllvm -asan-mapping-offset=0xdfff208000000000
 115 .endif
 116 .endif
 117
 118 KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
 119 .if !empty(KCSAN_ENABLED)
 120 SAN_CFLAGS+=    -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kcsan \
 121                 -fsanitize=thread
 122 .endif
 123
 124 KMSAN_ENABLED!= grep KMSAN opt_global.h || true ; echo
 125 .if !empty(KMSAN_ENABLED)
 126 SAN_CFLAGS+=    -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kmsan \
 127                 -fsanitize=kernel-memory
 128 .endif
 129
 130 KUBSAN_ENABLED!=        grep KUBSAN opt_global.h || true ; echo
 131 .if !empty(KUBSAN_ENABLED)
 132 SAN_CFLAGS+=    -fsanitize=undefined
 133 .endif
 134
 135 COVERAGE_ENABLED!=      grep COVERAGE opt_global.h || true ; echo
 136 .if !empty(COVERAGE_ENABLED)
 137 .if ${COMPILER_TYPE} == "clang" || \
 138     (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
 139 SAN_CFLAGS+=    -fsanitize-coverage=trace-pc,trace-cmp
 140 .else
 141 SAN_CFLAGS+=    -fsanitize-coverage=trace-pc
 142 .endif
 143 .endif
 144
 145 CFLAGS+=        ${SAN_CFLAGS}
 146
 147 GCOV_ENABLED!=  grep GCOV opt_global.h || true ; echo
 148 .if !empty(GCOV_ENABLED)
 149 .if ${COMPILER_TYPE} == "gcc"
 150 GCOV_CFLAGS+=    -fprofile-arcs -ftest-coverage
 151 .endif
 152 .endif
 153
 154 CFLAGS+=        ${GCOV_CFLAGS}
 155
 156 # Put configuration-specific C flags last so that they can override
 157 # the others.
 158 CFLAGS+=        ${CONF_CFLAGS}
 159
 160 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
 161 LDFLAGS+=       --build-id=sha1
 162 .endif
 163
 164 .if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
 165     ${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
 166     defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == "" && \
 167     !make(install)
 168 .error amd64/arm64/i386/ppc* kernel requires linker ifunc support
 169 .endif
 170 .if ${MACHINE_CPUARCH} == "amd64"
 171 LDFLAGS+=       -z max-page-size=2097152
 172 .if ${LINKER_TYPE} != "lld"
 173 LDFLAGS+=       -z common-page-size=4096
 174 .else
 175 .if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
 176 .warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
 177 .else
 178 LDFLAGS+=       -z notext -z ifunc-noplt
 179 .endif
 180 .endif
 181 .endif  # ${MACHINE_CPUARCH} == "amd64"
 182
 183 .if ${MACHINE_CPUARCH} == "riscv"
 184 # Hack: Work around undefined weak symbols being out of range when linking with
 185 # LLD (address is a PC-relative calculation, and BFD works around this by
 186 # rewriting the instructions to generate an absolute address of 0); -fPIE
 187 # avoids this since it uses the GOT for all extern symbols, which is overly
 188 # inefficient for us. Drop once undefined weak symbols work with medany.
 189 .if ${LINKER_TYPE} == "lld"
 190 CFLAGS+=        -fPIE
 191 .endif
 192 .endif
 193
 194 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
 195 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 196 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${.IMPSRC}
 197
 198 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
 199           ${CC} -c ${CFLAGS} ${WERROR} ${.PREFIX}.c
 200
 201 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
 202 NORMAL_FWO= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} -o ${.TARGET} \
 203         $S/kern/firmw.S -DFIRMW_FILE="${.ALLSRC:M*.fw}" \
 204         -DFIRMW_SYMBOL="${.ALLSRC:M*.fw:C/[-.\/]/_/g}"
 205
 206 # for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
 207 ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} \
 208         -I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} \
 209         -Wno-missing-prototypes -U__BMI__ -DZSTD_NO_INTRINSICS ${.IMPSRC}
 210 # https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
 211 # "Note that [GCC] autovectorization still does not do a good job on the
 212 # optimized version, so it's turned off via attribute and flag.  I found
 213 # that neither attribute nor command-line flag were entirely successful in
 214 # turning off vectorization, which is why there were both."
 215 .if ${COMPILER_TYPE} == "gcc"
 216 ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
 217 .endif
 218
 219 ZINCDIR=$S/contrib/openzfs/include
 220 # Common for dtrace / zfs
 221 CDDL_CFLAGS=    \
 222         -DFREEBSD_NAMECACHE \
 223         -D_SYS_VMEM_H_ \
 224         -D__KERNEL \
 225         -D__KERNEL__ \
 226         -nostdinc \
 227         -include $S/modules/zfs/static_ccompile.h \
 228         -I${ZINCDIR} \
 229         -I${ZINCDIR}/os/freebsd \
 230         -I${ZINCDIR}/os/freebsd/spl \
 231         -I${ZINCDIR}/os/freebsd/zfs  \
 232         -I$S/modules/zfs \
 233         -I$S/contrib/openzfs/module/zstd/include \
 234         ${CFLAGS} \
 235         -Wno-cast-qual \
 236         -Wno-duplicate-decl-specifier \
 237         -Wno-missing-braces \
 238         -Wno-missing-prototypes \
 239         -Wno-parentheses \
 240         -Wno-pointer-arith \
 241         -Wno-strict-prototypes \
 242         -Wno-switch \
 243         -Wno-undef \
 244         -Wno-uninitialized \
 245         -Wno-unknown-pragmas \
 246         -Wno-unused \
 247         -include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
 248         -I$S/cddl/contrib/opensolaris/uts/common \
 249         -I$S -I$S/cddl/compat/opensolaris
 250 CDDL_C=         ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${.IMPSRC}
 251
 252 # Special flags for managing the compat compiles for ZFS
 253 ZFS_CFLAGS+=    -I$S/contrib/openzfs/module/icp/include \
 254         ${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
 255         -DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP
 256
 257 .if ${MACHINE_ARCH} == "amd64"
 258 ZFS_CFLAGS+= -D__x86_64 -DHAVE_SSE2 -DHAVE_SSSE3 -DHAVE_SSE4_1 -DHAVE_SSE4_2 \
 259         -DHAVE_AVX -DHAVE_AVX2 -DHAVE_AVX512F -DHAVE_AVX512VL -DHAVE_AVX512BW
 260 .endif
 261
 262 .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
 263         ${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
 264 ZFS_CFLAGS+= -DBITS_PER_LONG=32
 265 .else
 266 ZFS_CFLAGS+= -DBITS_PER_LONG=64
 267 .endif
 268
 269
 270 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
 271 ZFS_C=          ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${.IMPSRC}
 272 ZFS_RPC_C=      ${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${.IMPSRC}
 273 ZFS_S=          ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 274
 275 # ATH driver
 276 ATH_CFLAGS=     -I${SRCTOP}/sys/dev/ath ${NO_WUNUSED_BUT_SET_VARIABLE}
 277 ATH_C=          ${CC} -c ${CFLAGS} ${WERROR} ${ATH_CFLAGS} ${.IMPSRC}
 278
 279 # Special flags for managing the compat compiles for DTrace
 280 DTRACE_CFLAGS=  -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
 281 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
 282 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
 283 .endif
 284 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
 285 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/common
 286 DTRACE_ASM_CFLAGS=      -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
 287 DTRACE_C=       ${CC} -c ${DTRACE_CFLAGS}       ${WERROR} ${.IMPSRC}
 288 DTRACE_S=       ${CC} -c ${DTRACE_ASM_CFLAGS}   ${WERROR} ${.IMPSRC}
 289
 290 # zlib code supports systems that are quite old, but will fix this issue once C2x gets radified.
 291 # see https://github.com/madler/zlib/issues/633 for details
 292 ZLIB_CFLAGS=    -Wno-cast-qual ${NO_WDEPRECATED_NON_PROTOTYPE} ${NO_WSTRICT_PROTOTYPES}
 293 ZLIB_C=         ${CC} -c ${CFLAGS} ${WERROR} ${ZLIB_CFLAGS} ${.IMPSRC}
 294
 295 # Special flags for managing the compat compiles for DTrace/FBT
 296 FBT_CFLAGS=     -DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt ${CDDL_CFLAGS} -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common
 297 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
 298 FBT_CFLAGS+=    -I$S/cddl/dev/fbt/x86
 299 .endif
 300 FBT_C=          ${CC} -c ${FBT_CFLAGS}          ${WERROR} ${.IMPSRC}
 301
 302 .if ${MK_CTF} != "no"
 303 NORMAL_CTFCONVERT=      ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
 304 .elif ${MAKE_VERSION} >= 5201111300
 305 NORMAL_CTFCONVERT=
 306 .else
 307 NORMAL_CTFCONVERT=      @:
 308 .endif
 309
 310 # Linux Kernel Programming Interface C-flags
 311 LINUXKPI_INCLUDES=      -I$S/compat/linuxkpi/common/include \
 312                         -I$S/compat/linuxkpi/dummy/include
 313 LINUXKPI_C=             ${NORMAL_C} ${LINUXKPI_INCLUDES}
 314
 315 # Infiniband C flags.  Correct include paths and omit errors that linux
 316 # does not honor.
 317 OFEDINCLUDES=   -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
 318 OFEDNOERR=      -Wno-cast-qual -Wno-pointer-arith
 319 OFEDCFLAGS=     ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
 320                 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
 321 OFED_C_NOIMP=   ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR}
 322 OFED_C=         ${OFED_C_NOIMP} ${.IMPSRC}
 323
 324 # mlxfw C flags.
 325 MLXFW_C=        ${OFED_C_NOIMP} \
 326                 -I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
 327                 -I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
 328                 ${.IMPSRC}
 329
 330 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
 331 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
 332 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
 333 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
 334 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
 335 SYSTEM_OBJS+= force-dynamic-hack.pico
 336
 337 KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
 338 KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
 339
 340 MD_ROOT_SIZE_CONFIGURED!=       grep MD_ROOT_SIZE opt_md.h || true ; echo
 341 .if ${MFS_IMAGE:Uno} != "no"
 342 .if empty(MD_ROOT_SIZE_CONFIGURED)
 343 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
 344 .endif
 345 .endif
 346 SYSTEM_LD_BASECMD= \
 347         ${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
 348         --no-warn-mismatch --warn-common --export-dynamic \
 349         --dynamic-linker /red/herring -X
 350 SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
 351 SYSTEM_LD_TAIL= @${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
 352 SYSTEM_DEP+= ${LDSCRIPT}
 353
 354 # Calculate path for .m files early, if needed.
 355 .if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
 356     (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
 357 __MPATH!=find ${S:tA}/ -name \*_if.m
 358 .endif
 359
 360 # MKMODULESENV is set here so that port makefiles can augment
 361 # them.
 362
 363 MKMODULESENV+=  MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
 364 MKMODULESENV+=  MACHINE_CPUARCH=${MACHINE_CPUARCH}
 365 MKMODULESENV+=  MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
 366 MKMODULESENV+=  MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
 367 MKMODULESENV+=  ARCH_FLAGS="${ARCH_FLAGS}"
 368 .if (${KERN_IDENT} == LINT)
 369 MKMODULESENV+=  ALL_MODULES=LINT
 370 .endif
 371 .if defined(MODULES_OVERRIDE)
 372 MKMODULESENV+=  MODULES_OVERRIDE="${MODULES_OVERRIDE}"
 373 .endif
 374 .if defined(DEBUG)
 375 MKMODULESENV+=  DEBUG_FLAGS="${DEBUG}"
 376 .endif
 377 .if !defined(NO_MODULES)
 378 MKMODULESENV+=  __MPATH="${__MPATH}"
 379 .endif
 380
 381 # Detect kernel config options that force stack frames to be turned on.
 382 DDB_ENABLED!=   grep DDB opt_ddb.h || true ; echo
 383 DTRACE_ENABLED!=grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
 384 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo