FreeBSD/Linux Kernel Cross Reference
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 .endif
106
107 KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
108 .if !empty(KCSAN_ENABLED)
109 SAN_CFLAGS+= -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kcsan \
110 -fsanitize=thread
111 .endif
112
113 KMSAN_ENABLED!= grep KMSAN opt_global.h || true ; echo
114 .if !empty(KMSAN_ENABLED)
115 SAN_CFLAGS+= -DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kmsan \
116 -fsanitize=kernel-memory
117 .endif
118
119 KUBSAN_ENABLED!= grep KUBSAN opt_global.h || true ; echo
120 .if !empty(KUBSAN_ENABLED)
121 SAN_CFLAGS+= -fsanitize=undefined
122 .endif
123
124 COVERAGE_ENABLED!= grep COVERAGE opt_global.h || true ; echo
125 .if !empty(COVERAGE_ENABLED)
126 .if ${COMPILER_TYPE} == "clang" || \
127 (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
128 SAN_CFLAGS+= -fsanitize-coverage=trace-pc,trace-cmp
129 .else
130 SAN_CFLAGS+= -fsanitize-coverage=trace-pc
131 .endif
132 .endif
133
134 CFLAGS+= ${SAN_CFLAGS}
135
136 GCOV_ENABLED!= grep GCOV opt_global.h || true ; echo
137 .if !empty(GCOV_ENABLED)
138 .if ${COMPILER_TYPE} == "gcc"
139 GCOV_CFLAGS+= -fprofile-arcs -ftest-coverage
140 .endif
141 .endif
142
143 CFLAGS+= ${GCOV_CFLAGS}
144
145 # Put configuration-specific C flags last so that they can override
146 # the others.
147 CFLAGS+= ${CONF_CFLAGS}
148
149 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
150 LDFLAGS+= --build-id=sha1
151 .endif
152
153 .if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
154 ${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
155 defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == "" && \
156 !make(install)
157 .error amd64/arm64/i386/ppc* kernel requires linker ifunc support
158 .endif
159 .if ${MACHINE_CPUARCH} == "amd64"
160 LDFLAGS+= -z max-page-size=2097152
161 .if ${LINKER_TYPE} != "lld"
162 LDFLAGS+= -z common-page-size=4096
163 .else
164 .if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
165 .warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
166 .else
167 LDFLAGS+= -z notext -z ifunc-noplt
168 .endif
169 .endif
170 .endif # ${MACHINE_CPUARCH} == "amd64"
171
172 .if ${MACHINE_CPUARCH} == "riscv"
173 # Hack: Work around undefined weak symbols being out of range when linking with
174 # LLD (address is a PC-relative calculation, and BFD works around this by
175 # rewriting the instructions to generate an absolute address of 0); -fPIE
176 # avoids this since it uses the GOT for all extern symbols, which is overly
177 # inefficient for us. Drop once undefined weak symbols work with medany.
178 .if ${LINKER_TYPE} == "lld"
179 CFLAGS+= -fPIE
180 .endif
181 .endif
182
183 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
184 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
185 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${.IMPSRC}
186
187 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
188 ${CC} -c ${CFLAGS} ${WERROR} ${.PREFIX}.c
189
190 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
191 NORMAL_FWO= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} -o ${.TARGET} \
192 $S/kern/firmw.S -DFIRMW_FILE="${.ALLSRC:M*.fw}" \
193 -DFIRMW_SYMBOL="${.ALLSRC:M*.fw:C/[-.\/]/_/g}"
194
195 # for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
196 ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} \
197 -I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} \
198 -Wno-missing-prototypes -U__BMI__ -DZSTD_NO_INTRINSICS ${.IMPSRC}
199 # https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
200 # "Note that [GCC] autovectorization still does not do a good job on the
201 # optimized version, so it's turned off via attribute and flag. I found
202 # that neither attribute nor command-line flag were entirely successful in
203 # turning off vectorization, which is why there were both."
204 .if ${COMPILER_TYPE} == "gcc"
205 ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
206 .endif
207
208 ZINCDIR=$S/contrib/openzfs/include
209 # Common for dtrace / zfs
210 CDDL_CFLAGS= \
211 -DFREEBSD_NAMECACHE \
212 -D_SYS_VMEM_H_ \
213 -D__KERNEL \
214 -D__KERNEL__ \
215 -nostdinc \
216 -include $S/modules/zfs/static_ccompile.h \
217 -I${ZINCDIR} \
218 -I${ZINCDIR}/os/freebsd \
219 -I${ZINCDIR}/os/freebsd/spl \
220 -I${ZINCDIR}/os/freebsd/zfs \
221 -I$S/modules/zfs \
222 -I$S/contrib/openzfs/module/zstd/include \
223 ${CFLAGS} \
224 -Wno-cast-qual \
225 -Wno-duplicate-decl-specifier \
226 -Wno-missing-braces \
227 -Wno-missing-prototypes \
228 -Wno-nested-externs \
229 -Wno-parentheses \
230 -Wno-pointer-arith \
231 -Wno-strict-prototypes \
232 -Wno-switch \
233 -Wno-undef \
234 -Wno-uninitialized \
235 -Wno-unknown-pragmas \
236 -Wno-unused \
237 -include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
238 -I$S/cddl/contrib/opensolaris/uts/common \
239 -I$S -I$S/cddl/compat/opensolaris
240 CDDL_C= ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${.IMPSRC}
241
242 # Special flags for managing the compat compiles for ZFS
243 ZFS_CFLAGS+= -I$S/contrib/openzfs/module/icp/include \
244 ${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
245 -DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
246 -DIN_FREEBSD_BASE
247
248 .if ${MACHINE_ARCH} == "amd64"
249 ZFS_CFLAGS+= -D__x86_64 -DHAVE_SSE2 -DHAVE_SSSE3 -DHAVE_SSE4_1 -DHAVE_SSE4_2 \
250 -DHAVE_AVX -DHAVE_AVX2 -DHAVE_AVX512F -DHAVE_AVX512VL -DHAVE_AVX512BW
251 .endif
252
253 .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
254 ${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
255 ZFS_CFLAGS+= -DBITS_PER_LONG=32
256 .else
257 ZFS_CFLAGS+= -DBITS_PER_LONG=64
258 .endif
259
260
261 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
262 ZFS_C= ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${.IMPSRC}
263 ZFS_RPC_C= ${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${.IMPSRC}
264 ZFS_S= ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
265
266 # ATH driver
267 ATH_CFLAGS= -I${SRCTOP}/sys/dev/ath ${NO_WUNUSED_BUT_SET_VARIABLE}
268 ATH_C= ${CC} -c ${CFLAGS} ${WERROR} ${ATH_CFLAGS} ${.IMPSRC}
269
270 # Special flags for managing the compat compiles for DTrace
271 DTRACE_CFLAGS= -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
272 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
273 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
274 .endif
275 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
276 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/common
277 DTRACE_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
278 DTRACE_C= ${CC} -c ${DTRACE_CFLAGS} ${WERROR} ${.IMPSRC}
279 DTRACE_S= ${CC} -c ${DTRACE_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
280
281 # Special flags for managing the compat compiles for DTrace/FBT
282 FBT_CFLAGS= -DBUILDING_DTRACE -nostdinc -I$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
283 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
284 FBT_CFLAGS+= -I$S/cddl/dev/fbt/x86
285 .endif
286 FBT_C= ${CC} -c ${FBT_CFLAGS} ${WERROR} ${.IMPSRC}
287
288 .if ${MK_CTF} != "no"
289 NORMAL_CTFCONVERT= ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
290 .elif ${MAKE_VERSION} >= 5201111300
291 NORMAL_CTFCONVERT=
292 .else
293 NORMAL_CTFCONVERT= @:
294 .endif
295
296 # Linux Kernel Programming Interface C-flags
297 LINUXKPI_INCLUDES= -I$S/compat/linuxkpi/common/include \
298 -I$S/compat/linuxkpi/dummy/include
299 LINUXKPI_C= ${NORMAL_C} ${LINUXKPI_INCLUDES}
300
301 # Infiniband C flags. Correct include paths and omit errors that linux
302 # does not honor.
303 OFEDINCLUDES= -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
304 OFEDNOERR= -Wno-cast-qual -Wno-pointer-arith
305 OFEDCFLAGS= ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
306 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
307 OFED_C_NOIMP= ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR}
308 OFED_C= ${OFED_C_NOIMP} ${.IMPSRC}
309
310 # mlxfw C flags.
311 MLXFW_C= ${OFED_C_NOIMP} \
312 -I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
313 -I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
314 ${.IMPSRC}
315
316 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
317 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
318 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
319 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
320 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
321 SYSTEM_OBJS+= force-dynamic-hack.pico
322
323 KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
324 KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
325
326 MD_ROOT_SIZE_CONFIGURED!= grep MD_ROOT_SIZE opt_md.h || true ; echo
327 .if ${MFS_IMAGE:Uno} != "no"
328 .if empty(MD_ROOT_SIZE_CONFIGURED)
329 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
330 .endif
331 .endif
332 SYSTEM_LD_BASECMD= \
333 ${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
334 --no-warn-mismatch --warn-common --export-dynamic \
335 --dynamic-linker /red/herring -X
336 SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
337 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
338 ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
339 SYSTEM_DEP+= ${LDSCRIPT}
340
341 # Calculate path for .m files early, if needed.
342 .if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
343 (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
344 __MPATH!=find ${S:tA}/ -name \*_if.m
345 .endif
346
347 # MKMODULESENV is set here so that port makefiles can augment
348 # them.
349
350 MKMODULESENV+= MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
351 MKMODULESENV+= MACHINE_CPUARCH=${MACHINE_CPUARCH}
352 MKMODULESENV+= MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
353 MKMODULESENV+= MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
354 MKMODULESENV+= ARCH_FLAGS="${ARCH_FLAGS}"
355 .if (${KERN_IDENT} == LINT)
356 MKMODULESENV+= ALL_MODULES=LINT
357 .endif
358 .if defined(MODULES_OVERRIDE)
359 MKMODULESENV+= MODULES_OVERRIDE="${MODULES_OVERRIDE}"
360 .endif
361 .if defined(DEBUG)
362 MKMODULESENV+= DEBUG_FLAGS="${DEBUG}"
363 .endif
364 .if !defined(NO_MODULES)
365 MKMODULESENV+= __MPATH="${__MPATH}"
366 .endif
367
368 # Detect kernel config options that force stack frames to be turned on.
369 DDB_ENABLED!= grep DDB opt_ddb.h || true ; echo
370 DTRACE_ENABLED!=grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
371 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo
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