52 lines
1.2 KiB
Makefile
52 lines
1.2 KiB
Makefile
# $Id:$
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M4?= m4
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.if exists(${.OBJDIR}/../btx)
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BTX= ${.OBJDIR}/../btx
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.else
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BTX= ${.CURDIR}/../btx
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.endif
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ORG1= 0x7c00
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ORG2= 0x1000
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CFLAGS= -elf -I${BTX}/lib -I. -fno-builtin \
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-O2 -malign-functions=0 -malign-jumps=0 -malign-loops=0 -mrtd \
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-Wall -Waggregate-return -Wbad-function-cast -Wcast-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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LDFLAGS=-nostdlib -static -N
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all: boot1 boot2
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boot1: boot1.out
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/usr/libexec/elf/objcopy -S -O binary boot1.out ${.TARGET}
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boot1.out: boot1.o
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${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
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boot1.o: boot1.m4 boot1.s
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${M4} boot1.m4 boot1.s | ${AS} ${AFLAGS} -o ${.TARGET}
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boot2: boot2.ldr boot2.bin
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btxld -v -E ${ORG2} -f bin -b ${BTX}/btx/btx -l boot2.ldr \
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-o ${.TARGET} -P 1 boot2.bin
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@ls -l boot2 | awk '{ x = 7680 - $$5; print x " bytes free"; \
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if (x < 0) exit 1 }'
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boot2.ldr:
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dd if=/dev/zero of=${.TARGET} bs=512 count=1 2>/dev/null
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boot2.bin: boot2.out
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/usr/libexec/elf/objcopy -S -O binary boot2.out ${.TARGET}
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boot2.out: boot2.o
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${LD} ${LDFLAGS} -Ttext ${ORG2} -o ${.TARGET} \
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${BTX}/lib/crt0.o boot2.o
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clean:
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rm -f boot1 boot1.out boot1.o boot2 boot2.ldr boot2.bin \
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boot2.out boot2.o
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