all: test.hex

CC = riscv64-linux-gnu-gcc
# CFLAGS = -march=rv32i -mabi=ilp32
CFLAGS = -march=rv64i -mabi=lp64 -o0

AS = riscv64-linux-gnu-as
ASFLAGS = $(CFLAGS)

LD = riscv64-linux-gnu-ld
LDFLAGS = -T test.ld

%.o: %.S
	$(AS) $(ASFLAGS) $^ -o $@

%.o: %.c
	$(CC) $(CFLAGS) $^ -o $@

%.elf: %.o
	$(LD) $(LDFLAGS) $^ -o $@

test.hex: test.elf
	riscv64-linux-gnu-objdump -s $^ | sed -n '/0000/,$$p' | cut -f3-6 -d ' ' | sed -e 's/ /\n/g' | sed 's/^\(..\)\(..\)\(..\)\(..\)/\4\3\2\1/' > $@