155d3e43ff
not page aligned. To do this, use the ld script gnu ld installs on my system. This is imperfect: LDFLAGS_BIN and LD_FLAGS_BIN describe different things. The loader script could be better named and take into account other architectures. And having two different mechanisms to do basically the same thing needs study. However, it's blocking forward progress on lld, so I'll work in parallel to sort these out. Differential Revision: https://reviews.freebsd.org/D7409 Reviewed by: emaste
118 lines
2.8 KiB
Makefile
118 lines
2.8 KiB
Makefile
# $FreeBSD$
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.include <bsd.own.mk>
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FILES= boot boot1 boot2
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NM?= nm
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# A value of 0x80 enables LBA support.
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BOOT_BOOT1_FLAGS?= 0x80
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BOOT_COMCONSOLE_PORT?= 0x3f8
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BOOT_COMCONSOLE_SPEED?= 9600
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B2SIOFMT?= 0x3
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REL1= 0x700
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ORG1= 0x7c00
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ORG2= 0x2000
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# Decide level of UFS support.
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BOOT2_UFS?= UFS1_AND_UFS2
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#BOOT2_UFS?= UFS2_ONLY
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#BOOT2_UFS?= UFS1_ONLY
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CFLAGS= -fomit-frame-pointer \
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-mrtd \
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-mregparm=3 \
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-DUSE_XREAD \
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-D${BOOT2_UFS} \
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-DFLAGS=${BOOT_BOOT1_FLAGS} \
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-DSIOPRT=${BOOT_COMCONSOLE_PORT} \
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-DSIOFMT=${B2SIOFMT} \
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-DSIOSPD=${BOOT_COMCONSOLE_SPEED} \
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-I${.CURDIR}/../../common \
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-I${.CURDIR}/../btx/lib -I. \
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-Wall -Waggregate-return -Wbad-function-cast -Wno-cast-align \
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-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
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-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings \
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-Winline
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CFLAGS.gcc+= -Os \
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-fno-guess-branch-probability \
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-fno-unit-at-a-time \
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--param max-inline-insns-single=100
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.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} <= 40201
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CFLAGS.gcc+= -mno-align-long-strings
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.endif
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CFLAGS.clang+= -Oz ${CLANG_OPT_SMALL}
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LD_FLAGS=${LD_FLAGS_BIN}
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# Pick up ../Makefile.inc early.
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.include <bsd.init.mk>
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CLEANFILES= boot
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boot: boot1 boot2
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cat boot1 boot2 > boot
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CLEANFILES+= boot1 boot1.out boot1.o
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boot1: boot1.out
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${OBJCOPY} -S -O binary boot1.out ${.TARGET}
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boot1.out: boot1.o
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${LD} ${LD_FLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
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CLEANFILES+= boot2 boot2.ld boot2.ldr boot2.bin boot2.out boot2.o \
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boot2.s boot2.s.tmp boot2.h sio.o
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boot2: boot2.ld
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@set -- `ls -l boot2.ld`; x=$$((7680-$$5)); \
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echo "$$x bytes available"; test $$x -ge 0
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dd if=boot2.ld of=${.TARGET} obs=7680 conv=osync status=none
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boot2.ld: boot2.ldr boot2.bin ${BTXKERN}
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btxld -v -E ${ORG2} -f bin -b ${BTXKERN} -l boot2.ldr \
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-o ${.TARGET} -P 1 boot2.bin
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boot2.ldr:
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dd if=/dev/zero of=${.TARGET} bs=512 count=1 status=none
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boot2.bin: boot2.out
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${OBJCOPY} -S -O binary boot2.out ${.TARGET}
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boot2.out: ${BTXCRT} boot2.o sio.o
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${LD} ${LD_FLAGS} -Ttext ${ORG2} -o ${.TARGET} ${.ALLSRC}
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boot2.o: boot2.s
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${CC} ${ACFLAGS} -c boot2.s
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SRCS= boot2.c boot2.h
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boot2.s: boot2.c boot2.h ${.CURDIR}/../../common/ufsread.c
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${CC} ${CFLAGS} -S -o boot2.s.tmp ${.CURDIR}/boot2.c
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sed -e '/align/d' -e '/nop/d' < boot2.s.tmp > boot2.s
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rm -f boot2.s.tmp
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boot2.h: boot1.out
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${NM} -t d ${.ALLSRC} | awk '/([0-9])+ T xread/ \
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{ x = $$1 - ORG1; \
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printf("#define XREADORG %#x\n", REL1 + x) }' \
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ORG1=`printf "%d" ${ORG1}` \
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REL1=`printf "%d" ${REL1}` > ${.TARGET}
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.if ${MACHINE_CPUARCH} == "amd64"
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beforedepend boot2.s: machine
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CLEANFILES+= machine
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machine: ${.CURDIR}/../../../i386/include .NOMETA
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ln -sf ${.ALLSRC} ${.TARGET}
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.endif
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.include <bsd.prog.mk>
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# XXX: clang integrated-as doesn't grok .codeNN directives yet
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CFLAGS.boot1.S= ${CLANG_NO_IAS}
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