3 # Part of a unified Makefile for building kernels. This part contains all
4 # of the definitions that need to be before %BEFORE_DEPEND.
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_)
19 .include <bsd.compiler.mk>
20 .include "kern.opts.mk"
22 # The kernel build always occurs in the object directory which is .CURDIR.
23 .if ${.MAKE.MODE:Unormal:Mmeta}
24 .MAKE.MODE+= curdirOk=yes
27 # The kernel build always expects .OBJDIR=.CURDIR.
30 .if defined(NO_OBJWALK) || ${MK_AUTO_OBJ} == "yes"
34 .if !defined(NO_OBJWALK)
38 # Can be overridden by makeoptions or /etc/make.conf
41 KODIR?= /boot/${KERNEL}
42 LDSCRIPT_NAME?= ldscript.$M
43 LDSCRIPT?= $S/conf/${LDSCRIPT_NAME}
57 .if ${MACHINE_CPUARCH} == "powerpc"
58 _MINUS_O= -O # gcc miscompiles some code at -O2
63 .if ${MACHINE_CPUARCH} == "amd64"
64 .if ${COMPILER_TYPE} == "clang"
67 COPTFLAGS?=-O2 -frename-registers -pipe
70 COPTFLAGS?=${_MINUS_O} -pipe
72 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
73 COPTFLAGS+= -fno-strict-aliasing
75 .if !defined(NO_CPU_COPTFLAGS)
76 COPTFLAGS+= ${_CPUCFLAGS}
80 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
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}"'
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}
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.
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}}
105 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
107 CFLAGS.gcc+= -falign-functions=16
108 .if ${PROFLEVEL} >= 2
109 CFLAGS+= -DGPROF4 -DGUPROF
111 .if ${COMPILER_TYPE} == "gcc"
112 PROF+= -mprofiler-epilogue
118 DEFINED_PROF= ${PROF}
120 KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
121 .if !empty(KCSAN_ENABLED)
122 SAN_CFLAGS+= -fsanitize=thread
125 KUBSAN_ENABLED!= grep KUBSAN opt_global.h || true ; echo
126 .if !empty(KUBSAN_ENABLED)
127 SAN_CFLAGS+= -fsanitize=undefined
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
136 SAN_CFLAGS+= -fsanitize-coverage=trace-pc
140 CFLAGS+= ${SAN_CFLAGS}
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
149 CFLAGS+= ${GCOV_CFLAGS}
151 # Put configuration-specific C flags last (except for ${PROF}) so that they
152 # can override the others.
153 CFLAGS+= ${CONF_CFLAGS}
155 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
156 LDFLAGS+= --build-id=sha1
159 .if (${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
164 .if ${MACHINE_CPUARCH} == "amd64"
165 LDFLAGS+= -z max-page-size=2097152
166 .if ${LINKER_TYPE} != "lld"
167 LDFLAGS+= -z common-page-size=4096
169 .if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
170 .warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
172 LDFLAGS+= -z notext -z ifunc-noplt
175 .endif # ${MACHINE_CPUARCH} == "amd64"
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"
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}
193 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
194 ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
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}
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 ${COMPILER_TYPE} == "gcc"
208 ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
211 ZINCDIR=$S/contrib/openzfs/include
212 # Common for dtrace / zfs
214 -DFREEBSD_NAMECACHE \
219 -include $S/modules/zfs/static_ccompile.h \
222 -I${ZINCDIR}/os/freebsd \
223 -I${ZINCDIR}/os/freebsd/spl \
224 -I${ZINCDIR}/os/freebsd/zfs \
226 -I$S/contrib/openzfs/module/zstd/include \
227 -I$S/contrib/openzfs/module/zstd/lib/freebsd/ \
229 -Wno-unknown-pragmas \
230 -Wno-missing-prototypes \
232 -Wno-strict-prototypes \
235 -Wno-redundant-decls \
236 -Wno-missing-braces \
242 -Wno-unknown-pragmas \
243 -Wno-duplicate-decl-specifier \
244 -include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
245 -I$S/cddl/contrib/opensolaris/uts/common \
246 -I$S -I$S/cddl/compat/opensolaris
247 CDDL_C= ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
249 # Special flags for managing the compat compiles for ZFS
250 ZFS_CFLAGS+= ${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
251 -DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
252 -DIN_FREEBSD_BASE -DHAVE_KSID
254 .if ${MACHINE_ARCH} == "amd64"
255 ZFS_CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F \
256 -DHAVE_SSSE3 -DHAVE_AVX512BW
259 .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
260 ${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
261 ZFS_CFLAGS+= -DBITS_PER_LONG=32
263 ZFS_CFLAGS+= -DBITS_PER_LONG=64
267 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
268 ZFS_C= ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
269 ZFS_RPC_C= ${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${PROF} ${.IMPSRC}
270 ZFS_S= ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
274 # Special flags for managing the compat compiles for DTrace
275 DTRACE_CFLAGS= -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
276 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
277 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
279 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
280 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/common
281 DTRACE_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
282 DTRACE_C= ${CC} -c ${DTRACE_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
283 DTRACE_S= ${CC} -c ${DTRACE_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
285 # Special flags for managing the compat compiles for DTrace/FBT
286 FBT_CFLAGS= -DBUILDING_DTRACE -nostdinc -I$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
287 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
288 FBT_CFLAGS+= -I$S/cddl/dev/fbt/x86
290 FBT_C= ${CC} -c ${FBT_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
292 .if ${MK_CTF} != "no"
293 NORMAL_CTFCONVERT= ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
294 .elif ${MAKE_VERSION} >= 5201111300
297 NORMAL_CTFCONVERT= @:
300 # Linux Kernel Programming Interface C-flags
301 LINUXKPI_INCLUDES= -I$S/compat/linuxkpi/common/include
302 LINUXKPI_C= ${NORMAL_C} ${LINUXKPI_INCLUDES}
304 # Infiniband C flags. Correct include paths and omit errors that linux
306 OFEDINCLUDES= -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
307 OFEDNOERR= -Wno-cast-qual -Wno-pointer-arith
308 OFEDCFLAGS= ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
309 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
310 OFED_C_NOIMP= ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
311 OFED_C= ${OFED_C_NOIMP} ${.IMPSRC}
314 MLXFW_C= ${OFED_C_NOIMP} \
315 -I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
316 -I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
319 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
320 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
321 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
322 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
323 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
324 SYSTEM_OBJS+= hack.pico
326 KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
327 KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
329 MD_ROOT_SIZE_CONFIGURED!= grep MD_ROOT_SIZE opt_md.h || true ; echo
330 .if ${MFS_IMAGE:Uno} != "no"
331 .if empty(MD_ROOT_SIZE_CONFIGURED)
332 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
336 ${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
337 --no-warn-mismatch --warn-common --export-dynamic \
338 --dynamic-linker /red/herring -X
339 SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
340 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
341 ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
342 SYSTEM_DEP+= ${LDSCRIPT}
344 # Calculate path for .m files early, if needed.
345 .if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
346 (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
347 __MPATH!=find ${S:tA}/ -name \*_if.m
350 # MKMODULESENV is set here so that port makefiles can augment
353 MKMODULESENV+= MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
354 MKMODULESENV+= MACHINE_CPUARCH=${MACHINE_CPUARCH}
355 MKMODULESENV+= MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
356 MKMODULESENV+= MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
357 MKMODULESENV+= ARCH_FLAGS="${ARCH_FLAGS}"
358 .if (${KERN_IDENT} == LINT)
359 MKMODULESENV+= ALL_MODULES=LINT
361 .if defined(MODULES_OVERRIDE)
362 MKMODULESENV+= MODULES_OVERRIDE="${MODULES_OVERRIDE}"
365 MKMODULESENV+= DEBUG_FLAGS="${DEBUG}"
367 .if !defined(NO_MODULES)
368 MKMODULESENV+= __MPATH="${__MPATH}"
371 # Architecture and output format arguments for objcopy to convert image to
374 .if ${MFS_IMAGE:Uno} != "no"
375 .if empty(MD_ROOT_SIZE_CONFIGURED)
376 .if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
377 EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
378 .if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
379 .undef EMBEDFS_FORMAT.${MACHINE_ARCH}
383 .if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
384 EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
385 .if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
386 .undef EMBEDFS_ARCH.${MACHINE_ARCH}
390 EMBEDFS_FORMAT.arm?= elf32-littlearm
391 EMBEDFS_FORMAT.armv6?= elf32-littlearm
392 EMBEDFS_FORMAT.armv7?= elf32-littlearm
393 EMBEDFS_FORMAT.aarch64?= elf64-littleaarch64
394 EMBEDFS_FORMAT.mips?= elf32-tradbigmips
395 EMBEDFS_FORMAT.mipsel?= elf32-tradlittlemips
396 EMBEDFS_FORMAT.mips64?= elf64-tradbigmips
397 EMBEDFS_FORMAT.mips64el?= elf64-tradlittlemips
398 EMBEDFS_FORMAT.riscv64?= elf64-littleriscv
402 # Detect kernel config options that force stack frames to be turned on.
403 DDB_ENABLED!= grep DDB opt_ddb.h || true ; echo
404 DTR_ENABLED!= grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
405 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo