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# $FreeBSD$
PROG= boot2
NOMAN=
STRIP=
BINDIR?= /boot
BINMODE= 444
CLEANFILES+= boot1 boot1.out boot1.o \
boot2.ldr boot2.bin boot2.ld boot2.out boot2.o \
sio.o
M4?= m4
# A value of 0x80 enables LBA support.
B1FLAGS= 0
BOOT_COMCONSOLE_PORT?= 0x3f8
BOOT_COMCONSOLE_SPEED?= 9600
B2SIOFMT?= 0x3
.if exists(${.OBJDIR}/../btx)
BTX= ${.OBJDIR}/../btx
.else
BTX= ${.CURDIR}/../btx
.endif
ORG1= 0x7c00
ORG2= 0x1000
CFLAGS= -elf -I${.CURDIR}/../btx/lib -I. \
-Os -fno-builtin -fforce-addr -fdata-sections \
-malign-functions=0 -malign-jumps=0 -malign-loops=0 -mrtd \
-mpreferred-stack-boundary=2 \
-Wall -Waggregate-return -Wbad-function-cast -Wcast-align \
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings
LDFLAGS=-nostdlib -static -N
all: boot1 boot2
boot1: boot1.out
objcopy -S -O binary boot1.out ${.TARGET}
boot1.out: boot1.o
${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
boot1.o: boot1.m4 boot1.s
(cd ${.CURDIR}; ${M4} -DFLAGS=${B1FLAGS} boot1.m4 boot1.s) | \
${AS} ${AFLAGS} -o ${.TARGET}
boot2: boot2.ldr boot2.bin
btxld -v -E ${ORG2} -f bin -b ${BTX}/btx/btx -l boot2.ldr \
-o boot2.ld -P 1 boot2.bin
@ls -l boot2.ld | awk '{ x = 7680 - $$5; \
print x " bytes available"; if (x < 0) exit 1 }'
dd if=boot2.ld of=${.TARGET} obs=7680 conv=osync 2>/dev/null
boot2.ldr:
dd if=/dev/zero of=${.TARGET} bs=512 count=1 2>/dev/null
boot2.bin: boot2.out
objcopy -S -O binary boot2.out ${.TARGET}
boot2.out: boot2.o sio.o
${LD} ${LDFLAGS} -Ttext ${ORG2} -o ${.TARGET} \
${BTX}/lib/crt0.o boot2.o sio.o
sio.o: sio.s
(cd ${.CURDIR}; ${M4} -DSIOPRT=${BOOT_COMCONSOLE_PORT} \
-DSIOFMT=${B2SIOFMT} \
-DSIOSPD=${BOOT_COMCONSOLE_SPEED} sio.s) | \
${AS} ${AFLAGS} -o ${.TARGET}
install:
${INSTALL} ${COPY} -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
boot1 ${DESTDIR}${BINDIR}/boot1
${INSTALL} ${COPY} -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
boot2 ${DESTDIR}${BINDIR}/boot2
.include <bsd.prog.mk>
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