xref: /freebsd/sys/conf/kern.pre.mk (revision a7dea1671b87c07d2d266f836bfa8b58efc7c134) 
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)
54_MINUS_O=	-O
55CTFFLAGS+=	-g
56.else
57.if ${MACHINE_CPUARCH} == "powerpc"
58_MINUS_O=	-O	# gcc miscompiles some code at -O2
59.else
60_MINUS_O=	-O2
61.endif
62.endif
63.if ${MACHINE_CPUARCH} == "amd64"
64.if ${COMPILER_TYPE} == "clang"
65COPTFLAGS?=-O2 -pipe
66.else
67COPTFLAGS?=-O2 -frename-registers -pipe
68.endif
69.else
70COPTFLAGS?=${_MINUS_O} -pipe
71.endif
72.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
73COPTFLAGS+= -fno-strict-aliasing
74.endif
75.if !defined(NO_CPU_COPTFLAGS)
76COPTFLAGS+= ${_CPUCFLAGS}
77.endif
78NOSTDINC= -nostdinc
79
80INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
81
82CFLAGS=	${COPTFLAGS} ${DEBUG}
83CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
84CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
85CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
86.if ${MACHINE_CPUARCH} == "mips"
87CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
88.endif
89CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
90CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
91CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
92CFLAGS.gcc+= -fms-extensions
93.if defined(CFLAGS_ARCH_PARAMS)
94CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
95.endif
96.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} < 50000
97WERROR?=	-Wno-error
98.else
99WERROR?=	-Werror
100.endif
101
102# XXX LOCORE means "don't declare C stuff" not "for locore.s".
103ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
104
105.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
106CFLAGS+=	-DGPROF
107CFLAGS.gcc+=	-falign-functions=16
108.if ${PROFLEVEL} >= 2
109CFLAGS+=	-DGPROF4 -DGUPROF
110PROF=		-pg
111.if ${COMPILER_TYPE} == "gcc"
112PROF+=		-mprofiler-epilogue
113.endif
114.else
115PROF=		-pg
116.endif
117.endif
118DEFINED_PROF=	${PROF}
119
120KCSAN_ENABLED!=	grep KCSAN opt_global.h || true ; echo
121.if !empty(KCSAN_ENABLED)
122SAN_CFLAGS+=	-fsanitize=thread
123.endif
124
125KUBSAN_ENABLED!=	grep KUBSAN opt_global.h || true ; echo
126.if !empty(KUBSAN_ENABLED)
127SAN_CFLAGS+=	-fsanitize=undefined
128.endif
129
130COVERAGE_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)
134SAN_CFLAGS+=	-fsanitize-coverage=trace-pc,trace-cmp
135.else
136SAN_CFLAGS+=	-fsanitize-coverage=trace-pc
137.endif
138.endif
139
140CFLAGS+=	${SAN_CFLAGS}
141
142GCOV_ENABLED!=	grep GCOV opt_global.h || true ; echo
143.if !empty(GCOV_ENABLED)
144.if ${COMPILER_TYPE} == "gcc"
145GCOV_CFLAGS+=	 -fprofile-arcs -ftest-coverage
146.endif
147.endif
148
149CFLAGS+=	${GCOV_CFLAGS}
150
151# Put configuration-specific C flags last (except for ${PROF}) so that they
152# can override the others.
153CFLAGS+=	${CONF_CFLAGS}
154
155.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
156LDFLAGS+=	--build-id=sha1
157.endif
158
159.if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
160    ${MACHINE_CPUARCH} == "i386") && \
161    defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
162.error amd64/arm64/i386 kernel requires linker ifunc support
163.endif
164.if ${MACHINE_CPUARCH} == "amd64"
165LDFLAGS+=	-z max-page-size=2097152
166.if ${LINKER_TYPE} != "lld"
167LDFLAGS+=	-z common-page-size=4096
168.else
169LDFLAGS+=	-z notext -z ifunc-noplt
170.endif
171.endif
172
173.if ${MACHINE_CPUARCH} == "riscv"
174# Hack: Work around undefined weak symbols being out of range when linking with
175# LLD (address is a PC-relative calculation, and BFD works around this by
176# rewriting the instructions to generate an absolute address of 0); -fPIE
177# avoids this since it uses the GOT for all extern symbols, which is overly
178# inefficient for us. Drop once undefined weak symbols work with medany.
179.if ${LINKER_TYPE} == "lld"
180CFLAGS+=	-fPIE
181.endif
182.endif
183
184NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
185NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
186PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
187NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
188
189NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
190	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
191
192NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
193NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
194	-m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
195
196# for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
197ZSTD_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}
198# https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
199# "Note that [GCC] autovectorization still does not do a good job on the
200# optimized version, so it's turned off via attribute and flag.  I found
201# that neither attribute nor command-line flag were entirely successful in
202# turning off vectorization, which is why there were both."
203.if ${COMPILER_TYPE} == "gcc"
204ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
205.endif
206
207# Common for dtrace / zfs
208CDDL_CFLAGS=	-DFREEBSD_NAMECACHE -nostdinc -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S -I$S/cddl/contrib/opensolaris/common ${CFLAGS} -Wno-unknown-pragmas -Wno-missing-prototypes -Wno-undef -Wno-strict-prototypes -Wno-cast-qual -Wno-parentheses -Wno-redundant-decls -Wno-missing-braces -Wno-uninitialized -Wno-unused -Wno-inline -Wno-switch -Wno-pointer-arith -Wno-unknown-pragmas
209CDDL_CFLAGS+=	-include $S/cddl/compat/opensolaris/sys/debug_compat.h
210CDDL_C=		${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
211
212# Special flags for managing the compat compiles for ZFS
213ZFS_CFLAGS=	-DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs
214ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/fs/zfs/lua
215ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/zmod
216ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/lz4
217ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/zfs
218ZFS_CFLAGS+=	${CDDL_CFLAGS}
219ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
220ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
221ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
222
223# Special flags for managing the compat compiles for DTrace
224DTRACE_CFLAGS=	-DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
225.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
226DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
227.endif
228DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
229DTRACE_ASM_CFLAGS=	-x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
230DTRACE_C=	${CC} -c ${DTRACE_CFLAGS}	${WERROR} ${PROF} ${.IMPSRC}
231DTRACE_S=	${CC} -c ${DTRACE_ASM_CFLAGS}	${WERROR} ${.IMPSRC}
232
233# Special flags for managing the compat compiles for DTrace/FBT
234FBT_CFLAGS=	-DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S ${CDDL_CFLAGS}
235.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
236FBT_CFLAGS+=	-I$S/cddl/dev/fbt/x86
237.endif
238FBT_C=		${CC} -c ${FBT_CFLAGS}		${WERROR} ${PROF} ${.IMPSRC}
239
240.if ${MK_CTF} != "no"
241NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
242.elif ${MAKE_VERSION} >= 5201111300
243NORMAL_CTFCONVERT=
244.else
245NORMAL_CTFCONVERT=	@:
246.endif
247
248# Linux Kernel Programming Interface C-flags
249LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
250LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
251
252# Infiniband C flags.  Correct include paths and omit errors that linux
253# does not honor.
254OFEDINCLUDES=	-I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
255OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
256OFEDCFLAGS=	${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
257		${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
258OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
259OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
260
261# mlxfw C flags.
262MLXFW_C=	${OFED_C_NOIMP} \
263		-I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
264		-I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
265		${.IMPSRC}
266
267GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
268SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
269SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
270SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
271SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
272SYSTEM_OBJS+= hack.pico
273
274MD_ROOT_SIZE_CONFIGURED!=	grep MD_ROOT_SIZE opt_md.h || true ; echo
275.if ${MFS_IMAGE:Uno} != "no"
276.if empty(MD_ROOT_SIZE_CONFIGURED)
277SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
278.endif
279.endif
280SYSTEM_LD_BASECMD= \
281	${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
282	--no-warn-mismatch --warn-common --export-dynamic \
283	--dynamic-linker /red/herring -X
284SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
285SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
286	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
287SYSTEM_DEP+= ${LDSCRIPT}
288
289# Calculate path for .m files early, if needed.
290.if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
291    (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
292__MPATH!=find ${S:tA}/ -name \*_if.m
293.endif
294
295# MKMODULESENV is set here so that port makefiles can augment
296# them.
297
298MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
299MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
300MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
301MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
302MKMODULESENV+=	ARCH_FLAGS="${ARCH_FLAGS}"
303.if (${KERN_IDENT} == LINT)
304MKMODULESENV+=	ALL_MODULES=LINT
305.endif
306.if defined(MODULES_OVERRIDE)
307MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
308.endif
309.if defined(DEBUG)
310MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
311.endif
312.if !defined(NO_MODULES)
313MKMODULESENV+=	__MPATH="${__MPATH}"
314.endif
315
316# Architecture and output format arguments for objcopy to convert image to
317# object file
318
319.if ${MFS_IMAGE:Uno} != "no"
320.if empty(MD_ROOT_SIZE_CONFIGURED)
321.if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
322EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
323.if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
324.undef EMBEDFS_FORMAT.${MACHINE_ARCH}
325.endif
326.endif
327
328.if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
329EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
330.if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
331.undef EMBEDFS_ARCH.${MACHINE_ARCH}
332.endif
333.endif
334
335EMBEDFS_FORMAT.arm?=		elf32-littlearm
336EMBEDFS_FORMAT.armv6?=		elf32-littlearm
337EMBEDFS_FORMAT.armv7?=		elf32-littlearm
338EMBEDFS_FORMAT.aarch64?=	elf64-littleaarch64
339EMBEDFS_FORMAT.mips?=		elf32-tradbigmips
340EMBEDFS_FORMAT.mipsel?=		elf32-tradlittlemips
341EMBEDFS_FORMAT.mips64?=		elf64-tradbigmips
342EMBEDFS_FORMAT.mips64el?=	elf64-tradlittlemips
343EMBEDFS_FORMAT.riscv64?=	elf64-littleriscv
344.endif
345.endif
346
347# Detect kernel config options that force stack frames to be turned on.
348DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
349DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
350HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo
351