fac6dee9eb
Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree. Assume clang is at least 6, which was in 11.2-RELEASE. Drop conditions for older compilers. Reviewed by: imp (earlier version), emaste, jhb MFC after: 2 weeks Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D24802
96 lines
2.3 KiB
Makefile
96 lines
2.3 KiB
Makefile
# $FreeBSD$
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.include <bsd.init.mk>
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FILES= boot boot1 boot2
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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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-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=${BOOT_COMCONSOLE_SPEED} \
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-I${LDRSRC} \
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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-asynchronous-unwind-tables \
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--param max-inline-insns-single=100
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CFLAGS.clang+= -Oz ${CLANG_OPT_SMALL}
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LD_FLAGS+=${LD_FLAGS_BIN}
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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} ${LD_FLAGS} -e start --defsym ORG=${ORG1} -T ${LDSCRIPT} -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.h sio.o
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BOOT2SIZE= 7680
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boot2: boot2.ld
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@set -- `ls -l ${.ALLSRC}`; x=$$((${BOOT2SIZE}-$$5)); \
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echo "$$x bytes available"; test $$x -ge 0
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${DD} if=${.ALLSRC} of=${.TARGET} bs=${BOOT2SIZE} conv=sync
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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=${.TARGET} bs=512 count=1
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boot2.bin: boot2.out
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${OBJCOPY} -S -O binary boot2.out ${.TARGET}
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# For __ashldi3
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.PATH: ${SRCTOP}/contrib/llvm-project/compiler-rt/lib/builtins
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CFLAGS.ashldi3.c= -Wno-missing-prototypes -Wno-missing-declarations
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CLEANFILES+= ashldi3.o
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boot2.out: ${BTXCRT} boot2.o sio.o ashldi3.o
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${LD} ${LD_FLAGS} --defsym ORG=${ORG2} -T ${LDSCRIPT} -o ${.TARGET} ${.ALLSRC}
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SRCS= boot2.c boot2.h
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boot2.h: boot1.out
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${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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.include <bsd.prog.mk>
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