xref: /openbsd/sys/arch/riscv64/conf/Makefile.riscv64 (revision d415bd75) 
1#	$OpenBSD: Makefile.riscv64,v 1.17 2023/09/06 01:47:37 jsg Exp $
2
3# For instructions on building kernels consult the config(8) and options(4)
4# manual pages.
5#
6# N.B.: NO DEPENDENCIES ON FOLLOWING FLAGS ARE VISIBLE TO MAKEFILE
7#	IF YOU CHANGE THE DEFINITION OF ANY OF THESE RECOMPILE EVERYTHING
8# DEBUG is set to -g by config if debugging is requested (config -g).
9# PROF is set to -pg by config if profiling is requested (config -p).
10
11.include <bsd.own.mk>
12
13SIZE?=	size
14STRIP?=	ctfstrip
15
16# source tree is located via $S relative to the compilation directory
17.ifndef S
18S!=	cd ../../../..; pwd
19.endif
20
21_machdir?=	$S/arch/${_mach}
22_archdir?=	$S/arch/${_arch}
23
24INCLUDES=	-nostdinc -I$S -I${.OBJDIR} -I$S/arch \
25		-I$S/dev/pci/drm/include \
26		-I$S/dev/pci/drm/include/uapi
27CPPFLAGS=	${INCLUDES} ${IDENT} ${PARAM} -D_KERNEL -D__${_mach}__ -MD -MP
28CWARNFLAGS=	-Werror -Wall -Wimplicit-function-declaration \
29		-Wno-pointer-sign \
30		-Wno-constant-conversion -Wno-address-of-packed-member \
31		-Wno-unused-but-set-variable -Wno-gnu-folding-constant \
32		-Wframe-larger-than=2047
33
34CMACHFLAGS=	-march=rv64gc -mcmodel=medany -mno-relax \
35		-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
36CMACHFLAGS+=	-ffreestanding ${NOPIE_FLAGS}
37SORTR=		sort -R
38.if ${IDENT:M-DNO_PROPOLICE}
39CMACHFLAGS+=	-fno-stack-protector
40.endif
41.if ${IDENT:M-DSMALL_KERNEL}
42SORTR=		cat
43COPTIMIZE?=	-Oz
44.endif
45
46DEBUG?=		-g
47COPTIMIZE?=	-O2
48CFLAGS=		${DEBUG} ${CWARNFLAGS} ${CMACHFLAGS} ${COPTIMIZE} ${COPTS} ${PIPE}
49AFLAGS=		-D_LOCORE -x assembler-with-cpp ${CWARNFLAGS} ${CMACHFLAGS}
50LINKFLAGS=	-T ld.script -X --warn-common -nopie
51
52HOSTCC?=	${CC}
53HOSTED_CPPFLAGS=${CPPFLAGS:S/^-nostdinc$//}
54HOSTED_CFLAGS=	${CFLAGS}
55HOSTED_C=	${HOSTCC} ${HOSTED_CFLAGS} ${HOSTED_CPPFLAGS} -c $<
56
57NORMAL_C_NOP=	${CC} ${CFLAGS} ${CPPFLAGS} -fno-ret-protector -c $<
58NORMAL_C=	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c $<
59NORMAL_S=	${CC} ${AFLAGS} ${CPPFLAGS} ${PROF} -c $<
60
61%OBJS
62
63%CFILES
64
65%SFILES
66
67# load lines for config "xxx" will be emitted as:
68# xxx: ${SYSTEM_DEP} swapxxx.o
69#	${SYSTEM_LD_HEAD}
70#	${SYSTEM_LD} swapxxx.o
71#	${SYSTEM_LD_TAIL}
72SYSTEM_HEAD=	locore0.o gap.o
73SYSTEM_OBJ=	${SYSTEM_HEAD} ${OBJS} param.o ioconf.o
74SYSTEM_DEP=	Makefile ${SYSTEM_OBJ} ld.script
75SYSTEM_LD_HEAD=	@rm -f $@
76SYSTEM_LD=	@echo ${LD} ${LINKFLAGS} -o $@ '$${SYSTEM_HEAD} vers.o $${OBJS}'; \
77		umask 007; \
78		echo ${OBJS} param.o ioconf.o vers.o | tr " " "\n" | ${SORTR} > lorder; \
79		${LD} ${LINKFLAGS} -o $@ ${SYSTEM_HEAD} `cat lorder`
80SYSTEM_LD_TAIL=	@${SIZE} $@
81
82.if ${DEBUG} == "-g"
83STRIPFLAGS=	-S
84SYSTEM_LD_TAIL+=; umask 007; \
85		echo mv $@ $@.gdb; rm -f $@.gdb; mv $@ $@.gdb; \
86		echo ${STRIP} ${STRIPFLAGS} -o $@ $@.gdb; \
87		${STRIP} ${STRIPFLAGS} -o $@ $@.gdb
88.else
89LINKFLAGS+=	-S
90.endif
91
92%LOAD
93
94# cc's -MD puts the source and output paths in the dependency file;
95# since those are temp files here we need to fix it up.  It also
96# puts the file in /tmp, so we use -MF to put it in the current
97# directory as assym.P and then generate assym.d from it with a
98# good target name
99assym.h: $S/kern/genassym.sh Makefile \
100	 ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf
101	cat ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf | \
102	    sh $S/kern/genassym.sh ${CC} ${CFLAGS} ${CPPFLAGS} -no-integrated-as -MF assym.P > assym.h.tmp
103	sed '1s/.*/assym.h: \\/' assym.P > assym.d
104	sort -u assym.h.tmp > assym.h
105
106param.c: $S/conf/param.c
107	rm -f param.c
108	cp $S/conf/param.c .
109
110param.o: param.c Makefile
111	${NORMAL_C}
112
113mcount.o: $S/lib/libkern/mcount.c Makefile
114	${NORMAL_C_NOP}
115
116ioconf.o: ioconf.c
117	${NORMAL_C}
118
119ld.script: ${_archdir}/conf/kern.ldscript
120	cat ${_archdir}/conf/kern.ldscript | \
121	    sed -e 's/@KERNEL_BASE_PHYS@/${KERNEL_BASE_PHYS}/' \
122	    -e 's/@KERNEL_BASE_VIRT@/${KERNEL_BASE_VIRT}/' > ld.script
123gapdummy.o:
124	echo '__asm(".section .rodata,\"a\"");' > gapdummy.c
125	${CC} -c ${CFLAGS} ${CPPFLAGS} gapdummy.c -o $@
126
127makegap.sh:
128	cp $S/conf/makegap.sh $@
129
130MAKE_GAP = LD="${LD}" sh makegap.sh 0x00000000 gapdummy.o
131
132gap.o:	Makefile makegap.sh gapdummy.o vers.o
133	${MAKE_GAP}
134
135vers.o: ${SYSTEM_DEP:Ngap.o}
136	sh $S/conf/newvers.sh
137	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c vers.c
138
139clean:
140	rm -f *bsd *bsd.gdb *.[dio] [a-z]*.s assym.* \
141	    gap.link gapdummy.c ld.script lorder makegap.sh param.c
142
143cleandir: clean
144	rm -f Makefile *.h ioconf.c options machine ${_mach} vers.c
145
146depend obj:
147
148locore0.o: ${_archdir}/${_arch}/locore0.S assym.h
149copy.o copystr.o: assym.h
150pagezero.o: assym.h
151cpuswitch.o exception.o support.o: assym.h
152locore.o trampoline.o: assym.h
153
154hardlink-obsd:
155	[[ ! -f /bsd ]] || cmp -s bsd /bsd || ln -f /bsd /obsd
156
157newinstall:
158	install -F -m 700 bsd /bsd && sha256 -h /var/db/kernel.SHA256 /bsd
159
160install: update-link hardlink-obsd newinstall
161
162# pull in the dependency information
163.ifnmake clean
164. for o in ${SYSTEM_OBJ:Ngap.o} assym.h
165.  if exists(${o:R}.d)
166.   include "${o:R}.d"
167.  elif exists($o)
168    .PHONY: $o
169.  endif
170. endfor
171.endif
172
173%RULES
174