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* Adds an MBR to prompt the use about USB or HDD boot * If USB boot is not selected, an INT13h override is added to make the second bootable drive think it is first (0x81 -> 0x80) * USB drive BIOS index is left unmodified
61 lines
1.6 KiB
Makefile
61 lines
1.6 KiB
Makefile
#
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# This file is part of the Rufus project.
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#
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# Copyright (c) 2012 Pete Batard <pete@akeo.ie>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, either version 3 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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#
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OBJECTS = mbr.o
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TARGET = mbr
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ASM = gcc
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CC = gcc
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LD = ld
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OBJDUMP = objdump
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OBJCOPY = objcopy
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CFLAGS = -m32
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LDFLAGS = -nostartfile
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.PHONY: all clean
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all: $(TARGET).bin
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clean:
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@-rm -f -v *.o *.out $(TARGET).map
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%.o: %.c Makefile
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@echo "[CC] $@"
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@$(CC) -c -o $*.o $(CFLAGS) $<
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%.o: %.S Makefile
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@echo "[AS] $<"
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@$(ASM) -c -o $*.o $(CFLAGS) $<
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# Produce a disassembly dump, for verification purposes
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dis: $(TARGET).out
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@echo "[DIS] $<"
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@$(OBJCOPY) -O binary -j .main --set-section-flags .main=alloc,load,readonly,code $< main.bin
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@$(OBJDUMP) -D -bbinary -mi8086 -Mintel main.bin | less
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@-rm -f main.bin
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$(TARGET).out: $(OBJECTS) $(TARGET).ld
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@echo "[LD] $@"
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@$(LD) $(LDFLAGS) -T$(TARGET).ld -o $@ $(OBJECTS) -Map $(TARGET).map
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$(TARGET).bin: $(TARGET).out
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@echo "[MBR] $@"
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@# Note: -j only works for sections that have the 'ALLOC' flag set
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@$(OBJCOPY) -O binary -j .main --gap-fill=0x00 $< $@
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