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    !make(install)
153.error amd64/arm64/i386/ppc* kernel requires linker ifunc support
154.endif
155.if ${MACHINE_CPUARCH} == "amd64"
156LDFLAGS+=	-z max-page-size=2097152
157.if ${LINKER_TYPE} != "lld"
158LDFLAGS+=	-z common-page-size=4096
159.else
160.if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
161.warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
162.else
163LDFLAGS+=	-z notext -z ifunc-noplt
164.endif
165.endif
166.endif  # ${MACHINE_CPUARCH} == "amd64"
167
168.if ${MACHINE_CPUARCH} == "riscv"
169# Hack: Work around undefined weak symbols being out of range when linking with
170# LLD (address is a PC-relative calculation, and BFD works around this by
171# rewriting the instructions to generate an absolute address of 0); -fPIE
172# avoids this since it uses the GOT for all extern symbols, which is overly
173# inefficient for us. Drop once undefined weak symbols work with medany.
174.if ${LINKER_TYPE} == "lld"
175CFLAGS+=	-fPIE
176.endif
177.endif
178
179NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
180NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
181PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
182NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
183
184NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
185	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
186
187NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
188NORMAL_FWO= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} -o ${.TARGET} \
189	$S/kern/firmw.S -DFIRMW_FILE="${.ALLSRC:M*.fw}" \
190	-DFIRMW_SYMBOL="${.ALLSRC:M*.fw:C/[-.\/]/_/g}"
191
192# for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
193ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} \
194	-I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} \
195	-Wno-missing-prototypes ${PROF} -U__BMI__ \
196	-DZSTD_NO_INTRINSICS \
197	${.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 ${COMPILER_TYPE} == "gcc"
204ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
205.endif
206
207ZINCDIR=$S/contrib/openzfs/include
208# Common for dtrace / zfs
209CDDL_CFLAGS=	\
210	-DFREEBSD_NAMECACHE \
211	-D_SYS_VMEM_H_ \
212	-D__KERNEL \
213	-D__KERNEL__ \
214	-nostdinc \
215	-include $S/modules/zfs/static_ccompile.h \
216	-I${ZINCDIR} \
217	-I${ZINCDIR}/os/freebsd \
218	-I${ZINCDIR}/os/freebsd/spl \
219	-I${ZINCDIR}/os/freebsd/zfs  \
220	-I$S/modules/zfs \
221	-I$S/contrib/openzfs/module/zstd/include \
222	${CFLAGS} \
223	-Wno-cast-qual \
224	-Wno-duplicate-decl-specifier \
225	-Wno-missing-braces \
226	-Wno-missing-prototypes \
227	-Wno-nested-externs \
228	-Wno-parentheses \
229	-Wno-pointer-arith \
230	-Wno-redundant-decls \
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
240CDDL_C=		${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
241
242# Special flags for managing the compat compiles for ZFS
243ZFS_CFLAGS+=	${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
244	-DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
245	-DIN_FREEBSD_BASE -DHAVE_KSID
246
247.if ${MACHINE_ARCH} == "amd64"
248ZFS_CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F \
249	-DHAVE_SSSE3 -DHAVE_AVX512BW
250.endif
251
252.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
253	${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
254ZFS_CFLAGS+= -DBITS_PER_LONG=32
255.else
256ZFS_CFLAGS+= -DBITS_PER_LONG=64
257.endif
258
259
260ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
261ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
262ZFS_RPC_C=	${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${PROF} ${.IMPSRC}
263ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
264
265
266
267# Special flags for managing the compat compiles for DTrace
268DTRACE_CFLAGS=	-DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
269.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
270DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
271.endif
272DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
273DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common
274DTRACE_ASM_CFLAGS=	-x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
275DTRACE_C=	${CC} -c ${DTRACE_CFLAGS}	${WERROR} ${PROF} ${.IMPSRC}
276DTRACE_S=	${CC} -c ${DTRACE_ASM_CFLAGS}	${WERROR} ${.IMPSRC}
277
278# Special flags for managing the compat compiles for DTrace/FBT
279FBT_CFLAGS=	-DBUILDING_DTRACE -nostdinc -I$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  
280.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
281FBT_CFLAGS+=	-I$S/cddl/dev/fbt/x86
282.endif
283FBT_C=		${CC} -c ${FBT_CFLAGS}		${WERROR} ${PROF} ${.IMPSRC}
284
285.if ${MK_CTF} != "no"
286NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
287.elif ${MAKE_VERSION} >= 5201111300
288NORMAL_CTFCONVERT=
289.else
290NORMAL_CTFCONVERT=	@:
291.endif
292
293# Linux Kernel Programming Interface C-flags
294LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
295LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
296
297# Infiniband C flags.  Correct include paths and omit errors that linux
298# does not honor.
299OFEDINCLUDES=	-I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
300OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
301OFEDCFLAGS=	${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
302		${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
303OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
304OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
305
306# mlxfw C flags.
307MLXFW_C=	${OFED_C_NOIMP} \
308		-I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
309		-I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
310		${.IMPSRC}
311
312GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
313SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
314SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
315SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
316SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
317SYSTEM_OBJS+= hack.pico
318
319KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
320KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
321
322MD_ROOT_SIZE_CONFIGURED!=	grep MD_ROOT_SIZE opt_md.h || true ; echo
323.if ${MFS_IMAGE:Uno} != "no"
324.if empty(MD_ROOT_SIZE_CONFIGURED)
325SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
326.endif
327.endif
328SYSTEM_LD_BASECMD= \
329	${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
330	--no-warn-mismatch --warn-common --export-dynamic \
331	--dynamic-linker /red/herring -X
332SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
333SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
334	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
335SYSTEM_DEP+= ${LDSCRIPT}
336
337# Calculate path for .m files early, if needed.
338.if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
339    (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
340__MPATH!=find ${S:tA}/ -name \*_if.m
341.endif
342
343# MKMODULESENV is set here so that port makefiles can augment
344# them.
345
346MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
347MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
348MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
349MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
350MKMODULESENV+=	ARCH_FLAGS="${ARCH_FLAGS}"
351.if (${KERN_IDENT} == LINT)
352MKMODULESENV+=	ALL_MODULES=LINT
353.endif
354.if defined(MODULES_OVERRIDE)
355MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
356.endif
357.if defined(DEBUG)
358MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
359.endif
360.if !defined(NO_MODULES)
361MKMODULESENV+=	__MPATH="${__MPATH}"
362.endif
363
364# Detect kernel config options that force stack frames to be turned on.
365DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
366DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
367HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo
368