42 lines
1.2 KiB
Makefile
42 lines
1.2 KiB
Makefile
# $FreeBSD$
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PROG= boot0
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NOMAN=
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STRIP=
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BINDIR?= /boot
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BINMODE= 444
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M4?= m4
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# The default set of flags compiled into boot0. This enables update (writing
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# the modified boot0 back to disk after running so that the selection made is
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# saved), packet mode (detect and use the BIOS EDD extensions if we try to
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# boot past the 1024 cylinder liimt), and booting from all valid slices.
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BOOT_BOOT0_FLAGS?= 0x8f
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# The number of timer ticks to wait for a keypress before assuming the default
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# selection. Since there are 18.2 ticks per second, the default value of
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# 0xb6 (182d) corresponds to 10 seconds.
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BOOT_BOOT0_TICKS?= 0xb6
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# The base address that we the boot0 code to to run it. Don't change this
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# unless you are glutton for punishment.
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BOOT_BOOT0_ORG?= 0x600
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boot0: boot0.o
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.if ${OBJFORMAT} == aout
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${LD} -N -s -T ${BOOT_BOOT0_ORG} -o boot0.out boot0.o
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dd if=boot0.out of=${.TARGET} ibs=32 skip=1
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.else
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${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o boot0.out boot0.o
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objcopy -S -O binary boot0.out ${.TARGET}
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.endif
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boot0.o: boot0.s
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${AS} ${AFLAGS} --defsym FLAGS=${BOOT_BOOT0_FLAGS} \
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--defsym TICKS=${BOOT_BOOT0_TICKS} ${.IMPSRC} -o ${.TARGET}
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CLEANFILES+= boot0.out boot0.o
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.include <bsd.prog.mk>
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