xref: /src/sys/arch/i386/stand/Makefile.booters

#	$NetBSD: Makefile.booters,v 1.39 2003/01/28 16:21:58 dsl Exp $

.include <bsd.own.mk>

STRIPFLAG=
BINMODE=444

LIBCRT0=	# nothing
LIBCRTBEGIN=	# nothing
LIBCRTEND=	# nothing
LIBC=		# nothing

# Make sure we override any optimization options specified by the
# user.
.if ${MACHINE_ARCH} == "x86_64"
COPTS=	-Os -m32
CPPFLAGS+= -DBOOT_ELF64
.else
COPTS=	-Os -mcpu=i386
.endif
COPTS+= -ffreestanding

I386_STAND_DIR?= $S/arch/i386/stand

.PATH: ${I386_STAND_DIR}/lib/crt/bootsect ${I386_STAND_DIR}/lib
# ensure the stuff we need to load all of 'biosboot' in in the first few
# sectors, and that anything that goes to real mode is in the first 64k.
# (prot_to_real will bleat if the return address is >64k)
BSSTART= start_bootsect.o fraglist.o bootsectmain.o biosdisk_ll.o \
	bios_disk.o diskbuf.o \
	biosdelay.o biosgetrtc.o biosmca.o biosmem.o biosmemx.o \
	biosreboot.o conio.o

.PATH: ${I386_STAND_DIR}/lib/crt/rom
ROMSTART= start_rom.o
GENPROMDIR= ${I386_STAND_DIR}/genprom
GENPROMOBJDIR!= cd ${GENPROMDIR} && ${PRINTOBJDIR}
GENPROM= ${GENPROMOBJDIR}/genprom

.PATH: ${I386_STAND_DIR}/lib/crt/dos
DOSSTART= start_dos.o doscommain.o

.PATH: ${I386_STAND_DIR}/lib/crt/pxe
PXESTART= start_pxe.o

CPPFLAGS += -nostdinc -I${.OBJDIR} -I$S -I${I386_STAND_DIR}/lib -I$S/lib/libsa
CPPFLAGS+= -D_STANDALONE

# XXX
.if ${MACHINE_ARCH} == "x86_64"
CPPFLAGS+=-m32
LD+=-m elf_i386
LIBKERN_ARCH=i386
KERNMISCMAKEFLAGS="LIBKERN_ARCH=i386"
.endif

CLEANFILES+= ${STARTFILE} vers.c ${BASE}.list
SRCS+=	vers.c

.if !make(obj) && !make(clean) && !make(cleandir)
.BEGIN: machine
.NOPATH: machine
.endif

realdepend realall: machine
CLEANFILES+= machine

machine::
	-rm -f $@
	ln -s $S/arch/i386/include $@

${OBJS} ${BSSTART} ${ROMSTART} ${DOSSTART} ${PXESTART}: machine

### find out what to use for libkern
KERN_AS=	library
.include "${S}/lib/libkern/Makefile.inc"
LIBKERN=	${KERNLIB}

### find out what to use for libz
Z_AS=		library
.include "${S}/lib/libz/Makefile.inc"
LIBZ=		${ZLIB}

### find out what to use for libsa
SA_AS=		library
SAMISCMAKEFLAGS+="SA_USE_LOADFILE=yes"
.include "${S}/lib/libsa/Makefile.inc"
LIBSA=		${SALIB}

### find out what to use for libi386
I386DIR= ${I386_STAND_DIR}/lib
.include "${I386DIR}/Makefile.inc"
LIBI386=		${I386LIB}

cleandir distclean: cleanlibdir

cleanlibdir:
	rm -rf lib

.if ${OBJECT_FMT} == "ELF"
LDFLAGS=-M -e start 	# -N does not work properly.
.else
LDFLAGS=-N -M -e _start 
.endif

LIBLIST=${LIBI386} ${LIBSA} ${LIBZ} ${LIBSA} ${LIBKERN} ${LIBI386} ${LIBSA}

vers.c: ${VERSIONFILE} ${SOURCES}
	sh ${S}conf/newvers_stand.sh ${.ALLSRC} 'i386' ${NEWVERSWHAT}

CLEANFILES+= ${BASE}.sym
${BASE}.sym: ${STARTFILE} ${OBJS} ${LIBSA} ${LIBZ} ${LIBKERN} ${LIBI386}
	@# A default link has a 4k gap between the rodata and data.
	@# We don't need it here - and are short of space!
	@# The -N option might work - but it puts the code at offset
	@# 0x80 in the file.
	@# Get linker to tell us its link script and remove the line.
	@rm -f ${BASE}.ldscript
	@ ${LD} --verbose >${BASE}.ldscript
	@ printf '%b'  "1,/^===/d\nd\nd\n/ALIGN(0x1000)/\nd\n/^===/\nd\nwq\n" \
		| ed -s ${BASE}.ldscript >/dev/null
	${LD} -o ${BASE}.sym ${LDFLAGS} -Ttext ${RELOC} -T ${BASE}.ldscript \
	    ${STARTFILE} ${OBJS} ${LIBLIST} >${BASE}.list
	@# The code, bss, data and stack are restricted to one 64k segment.
	@# Check there is a 'moderate' amount (4k) of stack space.
	@# 2k isn't enough, 3.5k might be (but harder to test for).
	@# If the stack is too small hair starts being pulled out.
	@ grep '^[ 0x]*[a-e].*PROVIDE (end, .)$$' ${BASE}.list >/dev/null || { \
		echo "*** Less that 4k stack space in biosboot" >&2; \
		rm -f ${BASE}.sym; \
		false; }

CLEANFILES+= ${BASE}.rom
${BASE}.rom: ${STARTFILE} ${OBJS} ${LIBSA} ${LIBZ} ${LIBKERN} ${LIBI386}
	${LD} -o ${BASE}.sym ${LDFLAGS} -Ttext ${RELOC} ${STARTFILE} ${OBJS} \
	    ${LIBLIST} >${BASE}.list
	${OBJCOPY} -O binary ${BASE}.sym ${BASE}.bin
	${GENPROM} ${ROM_SIZE} < ${BASE}.bin > ${BASE}.rom || \
	    rm -f ${BASE}.rom
	rm -f ${BASE}.bin

CLEANFILES+= ${BASE}.com
${BASE}.com: ${STARTFILE} ${OBJS} ${LIBSA} ${LIBZ} ${LIBKERN} ${LIBI386}
	${LD} -o ${BASE}.sym ${LDFLAGS} -Ttext ${RELOC} ${STARTFILE} ${OBJS} \
	    ${LIBLIST} >${BASE}.list
	${OBJCOPY} -O binary ${BASE}.sym ${BASE}.com

CLEANFILES+= ${BASE}.bin
${BASE}.bin: ${STARTFILE} ${OBJS} ${LIBSA} ${LIBZ} ${LIBKERN} ${LIBI386}
	${LD} -o ${BASE}.sym ${LDFLAGS} -Ttext ${RELOC} ${STARTFILE} ${OBJS} \
	    ${LIBLIST} > ${BASE}.list
	${OBJCOPY} -O binary ${BASE}.sym ${BASE}.bin

.include <bsd.prog.mk>