#	$OpenBSD: Makefile.octeon,v 1.63 2023/09/06 01:47:37 jsg Exp $

# For instructions on building kernels consult the config(8) and options(4)
# manual pages.
#
# N.B.: NO DEPENDENCIES ON FOLLOWING FLAGS ARE VISIBLE TO MAKEFILE
#	IF YOU CHANGE THE DEFINITION OF ANY OF THESE RECOMPILE EVERYTHING
# DEBUG is set to -g by config if debugging is requested (config -g).
# PROF is set to -pg by config if profiling is requested (config -p).

.include <bsd.own.mk>

SIZE?=	size
STRIP?=	ctfstrip
AS?=	as
CC?=	cc
LD?=	ld ${ENDIAN}

AS+=${ENDIAN}
CC+=${ENDIAN}
LD+=${ENDIAN}

# source tree is located via $S relative to the compilation directory
.ifndef S
S!=	cd ../../../..; pwd
.endif

_machdir?=	$S/arch/${_mach}
_archdir?=	$S/arch/${_arch}

INCLUDES=	-nostdinc -I$S -I${.OBJDIR} -I$S/arch
CPPFLAGS=	${INCLUDES} ${IDENT} ${PARAM} -D_KERNEL -D__${_mach}__ -MD -MP
CWARNFLAGS=	-Werror -Wall -Wimplicit-function-declaration \
		-Wno-pointer-sign \
		-Wframe-larger-than=2047

CMACHFLAGS=	-march=mips64r2 -mno-abicalls ${ABI} -msoft-float -G 0
CMACHFLAGS+=	-ffreestanding ${NOPIE_FLAGS}
SORTR=		sort -R
.if ${IDENT:M-DNO_PROPOLICE}
CMACHFLAGS+=	-fno-stack-protector
.endif
.if ${IDENT:M-DSMALL_KERNEL}
SORTR=		cat
COPTIMIZE?=	-Oz
.endif
.if ${COMPILER_VERSION:Mclang}
NO_INTEGR_AS=	-no-integrated-as
CMACHFLAGS+=	-fomit-frame-pointer
CWARNFLAGS+=	-Wno-address-of-packed-member -Wno-constant-conversion \
		-Wno-unused-but-set-variable -Wno-gnu-folding-constant
.endif

DEBUG?=		-g
COPTIMIZE?=	-O2
CFLAGS=		${DEBUG} ${CWARNFLAGS} ${CMACHFLAGS} ${COPTIMIZE} ${COPTS} ${PIPE}
AFLAGS=		-D_LOCORE -x assembler-with-cpp ${CWARNFLAGS} ${CMACHFLAGS}
LINKFLAGS=	-e start -T ld.script -Ttext=${LINK_ADDRESS} --warn-common -nopie

HOSTCC?=	${CC}
HOSTED_CPPFLAGS=${CPPFLAGS:S/^-nostdinc$//}
HOSTED_CFLAGS=	${CFLAGS}
HOSTED_C=	${HOSTCC} ${HOSTED_CFLAGS} ${HOSTED_CPPFLAGS} -c $<

NORMAL_C_NOP=	${CC} ${CFLAGS} ${CPPFLAGS} -fno-ret-protector -c $<
NORMAL_C=	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c $<
NORMAL_S=	${CC} ${AFLAGS} ${CPPFLAGS} ${PROF} -c $<

%OBJS

%CFILES

%SFILES

# load lines for config "xxx" will be emitted as:
# xxx: ${SYSTEM_DEP} swapxxx.o
#	${SYSTEM_LD_HEAD}
#	${SYSTEM_LD} swapxxx.o
#	${SYSTEM_LD_TAIL}
SYSTEM_HEAD=	locore0.o gap.o
SYSTEM_OBJ=	${SYSTEM_HEAD} ${OBJS} param.o ioconf.o
SYSTEM_DEP=	Makefile ${SYSTEM_OBJ} ld.script
SYSTEM_LD_HEAD=	@rm -f $@
SYSTEM_LD=	@echo ${LD} ${LINKFLAGS} -o $@ '$${SYSTEM_HEAD} vers.o $${OBJS}'; \
		umask 007; \
		echo ${OBJS} param.o ioconf.o vers.o | tr " " "\n" | ${SORTR} > lorder; \
		${LD} ${LINKFLAGS} -o $@ ${SYSTEM_HEAD} `cat lorder`
SYSTEM_LD_TAIL=	@${SIZE} $@

.if ${DEBUG} == "-g"
STRIPFLAGS=	-S
SYSTEM_LD_TAIL+=; umask 007; \
		echo mv $@ $@.gdb; rm -f $@.gdb; mv $@ $@.gdb; \
		echo ${STRIP} ${STRIPFLAGS} -o $@ $@.gdb; \
		${STRIP} ${STRIPFLAGS} -o $@ $@.gdb
.else
LINKFLAGS+=	-S
.endif

%LOAD

# cc's -MD puts the source and output paths in the dependency file;
# since those are temp files here we need to fix it up.  It also
# puts the file in /tmp, so we use -MF to put it in the current
# directory as assym.P and then generate assym.d from it with a
# good target name
assym.h: $S/kern/genassym.sh Makefile \
	 ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf
	cat ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf | \
	    sh $S/kern/genassym.sh ${CC} ${NO_INTEGR_AS} ${CFLAGS} ${CPPFLAGS} -MF assym.P > assym.h.tmp
	sed '1s/.*/assym.h: \\/' assym.P > assym.d
	sort -u assym.h.tmp > assym.h

param.c: $S/conf/param.c
	rm -f param.c
	cp $S/conf/param.c .

param.o: param.c Makefile
	${NORMAL_C}

mcount.o: $S/lib/libkern/mcount.c Makefile
	${NORMAL_C_NOP}

ioconf.o: ioconf.c
	${NORMAL_C}

ld.script: ${_machdir}/conf/ld.script
.if ${IDENT:M-DNO_RANDOMIZE}
	# Some broken firmware try to load ELF .openbsd.randomdata segment.
	# This fails because the segment overlaps with the actual kernel
	# ELF LOAD segment, and the firmware cannot allocate the memory region
	# as it is already in use. Avoid this by omitting PT_OPENBSD_RANDOMIZE.
	sed -e '/PT_OPENBSD_RANDOMIZE/d' \
	    -e 's/ :openbsd_randomize//' \
	    ${_machdir}/conf/ld.script > $@.tmp
	mv $@.tmp $@
.else
	cp ${_machdir}/conf/ld.script $@
.endif

gapdummy.o:
	echo '__asm(".section .rodata,\"a\"");' > gapdummy.c
	${CC} -c ${CFLAGS} ${CPPFLAGS} gapdummy.c -o $@

makegap.sh:
	cp $S/conf/makegap.sh $@

MAKE_GAP = LD="${LD}" sh makegap.sh 0xefefefef gapdummy.o

gap.o:	Makefile makegap.sh gapdummy.o vers.o
	${MAKE_GAP}

vers.o: ${SYSTEM_DEP:Ngap.o}
	sh $S/conf/newvers.sh
	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c vers.c

clean:
	rm -f *bsd *bsd.gdb *.[dio] [a-z]*.s assym.* \
	    gap.link gapdummy.c ld.script lorder makegap.sh param.c

cleandir: clean
	rm -f Makefile *.h ioconf.c options machine ${_mach} vers.c

depend obj:

locore0.o: ${_machdir}/${_mach}/locore0.S assym.h
context.o cp0access.o exception.o locore.o: assym.h
lcore_access.o lcore_ddb.o lcore_float.o tlbhandler.o: assym.h
mips64r2.o: assym.h

hardlink-obsd:
	[[ ! -f /bsd ]] || cmp -s bsd /bsd || ln -f /bsd /obsd

newinstall:
	install -F -m 700 bsd /bsd && sha256 -h /var/db/kernel.SHA256 /bsd

install: update-link hardlink-obsd newinstall

# pull in the dependency information
.ifnmake clean
. for o in ${SYSTEM_OBJ:Ngap.o} assym.h
.  if exists(${o:R}.d)
.   include "${o:R}.d"
.  elif exists($o)
    .PHONY: $o
.  endif
. endfor
.endif

%RULES