xref: /freebsd/sys/conf/kern.pre.mk (revision 1f474190) 
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.
12SRCCONF?=	/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) || ${MK_AUTO_OBJ} == "yes"
31NO_OBJWALK=		t
32NO_MODULES_OBJ=	t
33.endif
34.if !defined(NO_OBJWALK)
35_obj=		obj
36.endif
37
38# Can be overridden by makeoptions or /etc/make.conf
39KERNEL_KO?=	kernel
40KERNEL?=	kernel
41KODIR?=		/boot/${KERNEL}
42LDSCRIPT_NAME?=	ldscript.$M
43LDSCRIPT?=	$S/conf/${LDSCRIPT_NAME}
44
45M=		${MACHINE}
46
47AWK?=		awk
48CP?=		cp
49NM?=		nm
50OBJCOPY?=	objcopy
51SIZE?=		size
52
53.if defined(DEBUG)
54CTFFLAGS+=	-g
55.endif
56.if ${MACHINE_CPUARCH} == "amd64" && ${COMPILER_TYPE} != "clang"
57_COPTFLAGS_EXTRA=-frename-registers
58.else
59_COPTFLAGS_EXTRA=
60.endif
61COPTFLAGS?=-O2 -pipe ${_COPTFLAGS_EXTRA}
62.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
63COPTFLAGS+= -fno-strict-aliasing
64.endif
65.if !defined(NO_CPU_COPTFLAGS)
66COPTFLAGS+= ${_CPUCFLAGS}
67.endif
68NOSTDINC= -nostdinc
69
70INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
71
72CFLAGS=	${COPTFLAGS} ${DEBUG}
73CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
74CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
75CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
76.if ${MACHINE_CPUARCH} == "mips"
77CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
78.endif
79CFLAGS.gcc+= -fms-extensions -finline-limit=${INLINE_LIMIT}
80CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
81CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
82CFLAGS.gcc+= -fms-extensions
83.if defined(CFLAGS_ARCH_PARAMS)
84CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
85.endif
86WERROR?=	-Werror
87# The following should be removed no earlier than LLVM11 being imported into the
88# tree, to ensure we don't regress the build.  LLVM11 and GCC10 will switch the
89# default over to -fno-common, making this redundant.
90CFLAGS+=	-fno-common
91
92# XXX LOCORE means "don't declare C stuff" not "for locore.s".
93ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
94
95.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
96CFLAGS+=	-DGPROF
97CFLAGS.gcc+=	-falign-functions=16
98.if ${PROFLEVEL} >= 2
99CFLAGS+=	-DGPROF4 -DGUPROF
100PROF=		-pg
101.if ${COMPILER_TYPE} == "gcc"
102PROF+=		-mprofiler-epilogue
103.endif
104.else
105PROF=		-pg
106.endif
107.endif
108DEFINED_PROF=	${PROF}
109
110KCSAN_ENABLED!=	grep KCSAN opt_global.h || true ; echo
111.if !empty(KCSAN_ENABLED)
112SAN_CFLAGS+=	-fsanitize=thread
113.endif
114
115KUBSAN_ENABLED!=	grep KUBSAN opt_global.h || true ; echo
116.if !empty(KUBSAN_ENABLED)
117SAN_CFLAGS+=	-fsanitize=undefined
118.endif
119
120COVERAGE_ENABLED!=	grep COVERAGE opt_global.h || true ; echo
121.if !empty(COVERAGE_ENABLED)
122.if ${COMPILER_TYPE} == "clang" || \
123    (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
124SAN_CFLAGS+=	-fsanitize-coverage=trace-pc,trace-cmp
125.else
126SAN_CFLAGS+=	-fsanitize-coverage=trace-pc
127.endif
128.endif
129
130CFLAGS+=	${SAN_CFLAGS}
131
132GCOV_ENABLED!=	grep GCOV opt_global.h || true ; echo
133.if !empty(GCOV_ENABLED)
134.if ${COMPILER_TYPE} == "gcc"
135GCOV_CFLAGS+=	 -fprofile-arcs -ftest-coverage
136.endif
137.endif
138
139CFLAGS+=	${GCOV_CFLAGS}
140
141# Put configuration-specific C flags last (except for ${PROF}) so that they
142# can override the others.
143CFLAGS+=	${CONF_CFLAGS}
144
145.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
146LDFLAGS+=	--build-id=sha1
147.endif
148
149.if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
150    ${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
151    defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
152.error amd64/arm64/i386/ppc* kernel requires linker ifunc support
153.endif
154.if ${MACHINE_CPUARCH} == "amd64"
155LDFLAGS+=	-z max-page-size=2097152
156.if ${LINKER_TYPE} != "lld"
157LDFLAGS+=	-z common-page-size=4096
158.else
159.if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
160.warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
161.else
162LDFLAGS+=	-z notext -z ifunc-noplt
163.endif
164.endif
165.endif  # ${MACHINE_CPUARCH} == "amd64"
166
167.if ${MACHINE_CPUARCH} == "riscv"
168# Hack: Work around undefined weak symbols being out of range when linking with
169# LLD (address is a PC-relative calculation, and BFD works around this by
170# rewriting the instructions to generate an absolute address of 0); -fPIE
171# avoids this since it uses the GOT for all extern symbols, which is overly
172# inefficient for us. Drop once undefined weak symbols work with medany.
173.if ${LINKER_TYPE} == "lld"
174CFLAGS+=	-fPIE
175.endif
176.endif
177
178NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
179NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
180PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
181NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
182
183NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
184	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
185
186NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
187NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
188	-m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
189
190# for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
191ZSTD_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}
192# https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
193# "Note that [GCC] autovectorization still does not do a good job on the
194# optimized version, so it's turned off via attribute and flag.  I found
195# that neither attribute nor command-line flag were entirely successful in
196# turning off vectorization, which is why there were both."
197.if ${COMPILER_TYPE} == "gcc"
198ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
199.endif
200
201ZINCDIR=$S/contrib/openzfs/include
202# Common for dtrace / zfs
203CDDL_CFLAGS=	\
204	-DFREEBSD_NAMECACHE \
205	-D_SYS_VMEM_H_ \
206	-D__KERNEL \
207	-D__KERNEL__ \
208	-nostdinc \
209	-include $S/modules/zfs/static_ccompile.h \
210	-I${ZINCDIR} \
211	-I${ZINCDIR}/spl \
212	-I${ZINCDIR}/os/freebsd \
213	-I${ZINCDIR}/os/freebsd/spl \
214	-I${ZINCDIR}/os/freebsd/zfs  \
215	-I$S/modules/zfs \
216	-I$S/contrib/openzfs/module/zstd/include \
217	-I$S/contrib/openzfs/module/zstd/lib/freebsd/ \
218	${CFLAGS} \
219	-Wno-unknown-pragmas \
220	-Wno-missing-prototypes \
221	-Wno-undef \
222	-Wno-strict-prototypes \
223	-Wno-cast-qual \
224	-Wno-parentheses \
225	-Wno-redundant-decls \
226	-Wno-missing-braces \
227	-Wno-uninitialized \
228	-Wno-unused \
229	-Wno-inline \
230	-Wno-switch \
231	-Wno-pointer-arith \
232	-Wno-unknown-pragmas \
233	-Wno-duplicate-decl-specifier \
234	-include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
235	-I$S/cddl/contrib/opensolaris/uts/common \
236	-I$S -I$S/cddl/compat/opensolaris
237CDDL_C=		${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
238
239# Special flags for managing the compat compiles for ZFS
240ZFS_CFLAGS+=	${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
241	-DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
242	-DIN_FREEBSD_BASE -DHAVE_KSID
243
244.if ${MACHINE_ARCH} == "amd64"
245ZFS_CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F \
246	-DHAVE_SSSE3 -DHAVE_AVX512BW
247.endif
248
249.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
250	${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
251ZFS_CFLAGS+= -DBITS_PER_LONG=32
252.else
253ZFS_CFLAGS+= -DBITS_PER_LONG=64
254.endif
255
256
257ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
258ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
259ZFS_RPC_C=	${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${PROF} ${.IMPSRC}
260ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
261
262
263
264# Special flags for managing the compat compiles for DTrace
265DTRACE_CFLAGS=	-DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
266.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
267DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
268.endif
269DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
270DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common
271DTRACE_ASM_CFLAGS=	-x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
272DTRACE_C=	${CC} -c ${DTRACE_CFLAGS}	${WERROR} ${PROF} ${.IMPSRC}
273DTRACE_S=	${CC} -c ${DTRACE_ASM_CFLAGS}	${WERROR} ${.IMPSRC}
274
275# Special flags for managing the compat compiles for DTrace/FBT
276FBT_CFLAGS=	-DBUILDING_DTRACE -nostdinc -I$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
277.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
278FBT_CFLAGS+=	-I$S/cddl/dev/fbt/x86
279.endif
280FBT_C=		${CC} -c ${FBT_CFLAGS}		${WERROR} ${PROF} ${.IMPSRC}
281
282.if ${MK_CTF} != "no"
283NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
284.elif ${MAKE_VERSION} >= 5201111300
285NORMAL_CTFCONVERT=
286.else
287NORMAL_CTFCONVERT=	@:
288.endif
289
290# Linux Kernel Programming Interface C-flags
291LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
292LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
293
294# Infiniband C flags.  Correct include paths and omit errors that linux
295# does not honor.
296OFEDINCLUDES=	-I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
297OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
298OFEDCFLAGS=	${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
299		${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
300OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
301OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
302
303# mlxfw C flags.
304MLXFW_C=	${OFED_C_NOIMP} \
305		-I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
306		-I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
307		${.IMPSRC}
308
309GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
310SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
311SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
312SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
313SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
314SYSTEM_OBJS+= hack.pico
315
316KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
317KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
318
319MD_ROOT_SIZE_CONFIGURED!=	grep MD_ROOT_SIZE opt_md.h || true ; echo
320.if ${MFS_IMAGE:Uno} != "no"
321.if empty(MD_ROOT_SIZE_CONFIGURED)
322SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
323.endif
324.endif
325SYSTEM_LD_BASECMD= \
326	${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
327	--no-warn-mismatch --warn-common --export-dynamic \
328	--dynamic-linker /red/herring -X
329SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
330SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
331	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
332SYSTEM_DEP+= ${LDSCRIPT}
333
334# Calculate path for .m files early, if needed.
335.if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
336    (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
337__MPATH!=find ${S:tA}/ -name \*_if.m
338.endif
339
340# MKMODULESENV is set here so that port makefiles can augment
341# them.
342
343MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
344MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
345MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
346MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
347MKMODULESENV+=	ARCH_FLAGS="${ARCH_FLAGS}"
348.if (${KERN_IDENT} == LINT)
349MKMODULESENV+=	ALL_MODULES=LINT
350.endif
351.if defined(MODULES_OVERRIDE)
352MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
353.endif
354.if defined(DEBUG)
355MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
356.endif
357.if !defined(NO_MODULES)
358MKMODULESENV+=	__MPATH="${__MPATH}"
359.endif
360
361# Detect kernel config options that force stack frames to be turned on.
362DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
363DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
364HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo
365