Makefile

PAYLOAD64 := helloworld-gas-64bit
C_PAYLOAD64 := helloworld-c-64bit

all: kvm_test

kvm_test: kvm_test.c
	gcc kvm_test.c -o kvm_test

kvm_bare: kvm_bare.c
	gcc kvm_bare.c -o kvm_bare

bare: bare.c
	cc -c bare.c
	objcopy bare.o bare -O binary

helloworld-gas-16bit.o: helloworld-gas-16bit.s
	as -32 helloworld-gas-16bit.s -o helloworld-gas-16bit.o

helloworld-gas-16bit.bin: helloworld-gas-16bit.o
	ld -m elf_i386 --oformat binary -N -e _start -Ttext 0x10000 -o helloworld-gas-16bit.bin helloworld-gas-16bit.o

.PHONY: disasm-16
disasm-16: helloworld-gas-16bit.bin
	objdump -D helloworld-gas-16bit.o
	hexdump -C helloworld-gas-16bit.bin

$(PAYLOAD64).o: $(PAYLOAD64).s
	as -64 $(PAYLOAD64).s -o $(PAYLOAD64).o

$(PAYLOAD64).bin: $(PAYLOAD64).o
	ld --oformat binary -N -e _start -Ttext 0x10000 -o $(PAYLOAD64).bin $(PAYLOAD64).o

.PHONY: disasm-64
disasm-64: $(PAYLOAD64).bin
	objdump -D $(PAYLOAD64).o
	hexdump -C $(PAYLOAD64).bin

.PHONY: run-kvm_bare
run-kvm_bare-16: kvm_bare disasm-16 helloworld-gas-16bit.bin
	./kvm_bare helloworld-gas-16bit.bin

run-kvm_bare-64: kvm_bare disasm-64 $(PAYLOAD64).bin
	./kvm_bare $(PAYLOAD64).bin

$(C_PAYLOAD64).o: $(C_PAYLOAD64).c
	gcc -nostdlib -fomit-frame-pointer -m64 -c $(C_PAYLOAD64).c -o $(C_PAYLOAD64).o

$(C_PAYLOAD64).bin: $(C_PAYLOAD64).o
	ld --oformat binary -N -e _start -Ttext 0x10000 -o $(C_PAYLOAD64).bin $(C_PAYLOAD64).o

.PHONY: run-kvm_bare-c-64
run-kvm_bare-c-64: kvm_bare $(C_PAYLOAD64).bin	$(C_PAYLOAD64).o
	objdump -d $(C_PAYLOAD64).o
	hexdump -C $(C_PAYLOAD64).bin
	# the objdump thing is to get the _start symbol address
	./kvm_bare $(C_PAYLOAD64).bin $(shell objdump -t $(C_PAYLOAD64).o | grep '_start' | cut -f 1 -d ' ')

.PHONY: clean
clean:
	rm *.o *.bin kvm_bare kvm_test