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} == "amd64" && ${COMPILER_TYPE} != "clang"
58 _COPTFLAGS_EXTRA=-frename-registers
62 COPTFLAGS?=-O2 -pipe ${_COPTFLAGS_EXTRA}
63 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
64 COPTFLAGS+= -fno-strict-aliasing
66 .if !defined(NO_CPU_COPTFLAGS)
67 COPTFLAGS+= ${_CPUCFLAGS}
71 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
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 .if ${MACHINE_CPUARCH} == "mips"
78 CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
80 CFLAGS.gcc+= -fms-extensions -finline-limit=${INLINE_LIMIT}
81 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
82 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
83 CFLAGS.gcc+= -fms-extensions
84 .if defined(CFLAGS_ARCH_PARAMS)
85 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
88 # The following should be removed no earlier than LLVM11 being imported into the
89 # tree, to ensure we don't regress the build. LLVM11 and GCC10 will switch the
90 # default over to -fno-common, making this redundant.
93 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
94 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
96 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
98 CFLAGS.gcc+= -falign-functions=16
100 CFLAGS+= -DGPROF4 -DGUPROF
102 .if ${COMPILER_TYPE} == "gcc"
103 PROF+= -mprofiler-epilogue
109 DEFINED_PROF= ${PROF}
111 COMPAT_FREEBSD32_ENABLED!= grep COMPAT_FREEBSD32 opt_global.h || true ; echo
113 KASAN_ENABLED!= grep KASAN opt_global.h || true ; echo
114 .if !empty(KASAN_ENABLED)
115 SAN_CFLAGS+= -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kasan \
116 -fsanitize=kernel-address \
117 -mllvm -asan-stack=true \
118 -mllvm -asan-instrument-dynamic-allocas=true \
119 -mllvm -asan-globals=true \
120 -mllvm -asan-use-after-scope=true \
121 -mllvm -asan-instrumentation-with-call-threshold=0 \
122 -mllvm -asan-instrument-byval=false
125 KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
126 .if !empty(KCSAN_ENABLED)
127 SAN_CFLAGS+= -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kcsan \
131 KMSAN_ENABLED!= grep KMSAN opt_global.h || true ; echo
132 .if !empty(KMSAN_ENABLED)
133 SAN_CFLAGS+= -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kmsan \
134 -fsanitize=kernel-memory
137 KUBSAN_ENABLED!= grep KUBSAN opt_global.h || true ; echo
138 .if !empty(KUBSAN_ENABLED)
139 SAN_CFLAGS+= -fsanitize=undefined
142 COVERAGE_ENABLED!= grep COVERAGE opt_global.h || true ; echo
143 .if !empty(COVERAGE_ENABLED)
144 .if ${COMPILER_TYPE} == "clang" || \
145 (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
146 SAN_CFLAGS+= -fsanitize-coverage=trace-pc,trace-cmp
148 SAN_CFLAGS+= -fsanitize-coverage=trace-pc
152 CFLAGS+= ${SAN_CFLAGS}
154 GCOV_ENABLED!= grep GCOV opt_global.h || true ; echo
155 .if !empty(GCOV_ENABLED)
156 .if ${COMPILER_TYPE} == "gcc"
157 GCOV_CFLAGS+= -fprofile-arcs -ftest-coverage
161 CFLAGS+= ${GCOV_CFLAGS}
163 # Put configuration-specific C flags last (except for ${PROF}) so that they
164 # can override the others.
165 CFLAGS+= ${CONF_CFLAGS}
167 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
168 LDFLAGS+= --build-id=sha1
171 .if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
172 ${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
173 defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == "" && \
175 .error amd64/arm64/i386/ppc* kernel requires linker ifunc support
177 .if ${MACHINE_CPUARCH} == "amd64"
178 LDFLAGS+= -z max-page-size=2097152
179 .if ${LINKER_TYPE} != "lld"
180 LDFLAGS+= -z common-page-size=4096
182 .if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
183 .warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
185 LDFLAGS+= -z notext -z ifunc-noplt
188 .endif # ${MACHINE_CPUARCH} == "amd64"
190 .if ${MACHINE_CPUARCH} == "riscv"
191 # Hack: Work around undefined weak symbols being out of range when linking with
192 # LLD (address is a PC-relative calculation, and BFD works around this by
193 # rewriting the instructions to generate an absolute address of 0); -fPIE
194 # avoids this since it uses the GOT for all extern symbols, which is overly
195 # inefficient for us. Drop once undefined weak symbols work with medany.
196 .if ${LINKER_TYPE} == "lld"
201 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
202 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
203 PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
204 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
206 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
207 ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
209 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
210 NORMAL_FWO= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} -o ${.TARGET} \
211 $S/kern/firmw.S -DFIRMW_FILE="${.ALLSRC:M*.fw}" \
212 -DFIRMW_SYMBOL="${.ALLSRC:M*.fw:C/[-.\/]/_/g}"
214 # for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
215 ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} \
216 -I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} \
217 -Wno-missing-prototypes ${PROF} -U__BMI__ \
218 -DZSTD_NO_INTRINSICS \
220 # https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
221 # "Note that [GCC] autovectorization still does not do a good job on the
222 # optimized version, so it's turned off via attribute and flag. I found
223 # that neither attribute nor command-line flag were entirely successful in
224 # turning off vectorization, which is why there were both."
225 .if ${COMPILER_TYPE} == "gcc"
226 ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
229 ZINCDIR=$S/contrib/openzfs/include
230 # Common for dtrace / zfs
232 -DFREEBSD_NAMECACHE \
237 -include $S/modules/zfs/static_ccompile.h \
239 -I${ZINCDIR}/os/freebsd \
240 -I${ZINCDIR}/os/freebsd/spl \
241 -I${ZINCDIR}/os/freebsd/zfs \
243 -I$S/contrib/openzfs/module/zstd/include \
246 -Wno-duplicate-decl-specifier \
247 -Wno-missing-braces \
248 -Wno-missing-prototypes \
249 -Wno-nested-externs \
252 -Wno-redundant-decls \
253 -Wno-strict-prototypes \
257 -Wno-unknown-pragmas \
259 -include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
260 -I$S/cddl/contrib/opensolaris/uts/common \
261 -I$S -I$S/cddl/compat/opensolaris
262 CDDL_C= ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
264 # Special flags for managing the compat compiles for ZFS
265 ZFS_CFLAGS+= ${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
266 -DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
269 .if ${MACHINE_ARCH} == "amd64"
270 ZFS_CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F \
271 -DHAVE_SSSE3 -DHAVE_AVX512BW
274 .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
275 ${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
276 ZFS_CFLAGS+= -DBITS_PER_LONG=32
278 ZFS_CFLAGS+= -DBITS_PER_LONG=64
282 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
283 ZFS_C= ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
284 ZFS_RPC_C= ${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${PROF} ${.IMPSRC}
285 ZFS_S= ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
289 # Special flags for managing the compat compiles for DTrace
290 DTRACE_CFLAGS= -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
291 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
292 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
294 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
295 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/common
296 DTRACE_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
297 DTRACE_C= ${CC} -c ${DTRACE_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
298 DTRACE_S= ${CC} -c ${DTRACE_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
300 # Special flags for managing the compat compiles for DTrace/FBT
301 FBT_CFLAGS= -DBUILDING_DTRACE -nostdinc -I$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
302 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
303 FBT_CFLAGS+= -I$S/cddl/dev/fbt/x86
305 FBT_C= ${CC} -c ${FBT_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
307 .if ${MK_CTF} != "no"
308 NORMAL_CTFCONVERT= ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
309 .elif ${MAKE_VERSION} >= 5201111300
312 NORMAL_CTFCONVERT= @:
315 # Linux Kernel Programming Interface C-flags
316 LINUXKPI_INCLUDES= -I$S/compat/linuxkpi/common/include \
317 -I$S/compat/linuxkpi/dummy/include
318 LINUXKPI_C= ${NORMAL_C} ${LINUXKPI_INCLUDES}
320 # Infiniband C flags. Correct include paths and omit errors that linux
322 OFEDINCLUDES= -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
323 OFEDNOERR= -Wno-cast-qual -Wno-pointer-arith -Wno-redundant-decls
324 OFEDCFLAGS= ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
325 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
326 OFED_C_NOIMP= ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
327 OFED_C= ${OFED_C_NOIMP} ${.IMPSRC}
330 MLXFW_C= ${OFED_C_NOIMP} \
331 -I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
332 -I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
335 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
336 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
337 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
338 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
339 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
340 SYSTEM_OBJS+= hack.pico
342 KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
343 KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
345 MD_ROOT_SIZE_CONFIGURED!= grep MD_ROOT_SIZE opt_md.h || true ; echo
346 .if ${MFS_IMAGE:Uno} != "no"
347 .if empty(MD_ROOT_SIZE_CONFIGURED)
348 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
352 ${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
353 --no-warn-mismatch --warn-common --export-dynamic \
354 --dynamic-linker /red/herring -X
355 SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
356 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
357 ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
358 SYSTEM_DEP+= ${LDSCRIPT}
360 # Calculate path for .m files early, if needed.
361 .if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
362 (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
363 __MPATH!=find ${S:tA}/ -name \*_if.m
366 # MKMODULESENV is set here so that port makefiles can augment
369 MKMODULESENV+= MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
370 MKMODULESENV+= MACHINE_CPUARCH=${MACHINE_CPUARCH}
371 MKMODULESENV+= MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
372 MKMODULESENV+= MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
373 MKMODULESENV+= ARCH_FLAGS="${ARCH_FLAGS}"
374 .if (${KERN_IDENT} == LINT)
375 MKMODULESENV+= ALL_MODULES=LINT
377 .if defined(MODULES_OVERRIDE)
378 MKMODULESENV+= MODULES_OVERRIDE="${MODULES_OVERRIDE}"
381 MKMODULESENV+= DEBUG_FLAGS="${DEBUG}"
383 .if !defined(NO_MODULES)
384 MKMODULESENV+= __MPATH="${__MPATH}"
387 # Detect kernel config options that force stack frames to be turned on.
388 DDB_ENABLED!= grep DDB opt_ddb.h || true ; echo
389 DTRACE_ENABLED!=grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
390 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo