48 lines
1 KiB
Makefile
48 lines
1 KiB
Makefile
TOOLPREFIX = riscv-none-elf
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CC = $(TOOLPREFIX)-gcc
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AS = $(TOOLPREFIX)-as
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LD = $(TOOLPREFIX)-ld
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OBJCOPY = $(TOOLPREFIX)-objcopy
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OBJDUMP = $(TOOLPREFIX)-objdump
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ASFLAGS = -march=rv64gc -mabi=lp64
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LDFLAGS = -Tlink.ld
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LDFLAGS += -m elf64lriscv
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CFLAGS = -Wall -Werror -O
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CFLAGS += -mcmodel=medany
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CFLAGS += -march=rv64gc -mabi=lp64
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CFLAGS += -ffreestanding -fno-common -nostdlib -mno-relax
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CFLAGS += -I.
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CFLAGS += -fno-stack-protector # Prevents code that needs libc / runtime support
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CFLAGS += -MD # Generate header dependency files (.d)
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CFLAGS += -fno-pie -no-pie # Fixed address linking
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CFLAGS += -ggdb -gdwarf-2 # GDB debug info
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CFLAGS += -fno-omit-frame-pointer # More reliable backtraces in GDB
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all: kernel.elf
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kernel.elf: entry.o start.o
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@echo LD $@
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@$(LD) $(LDFLAGS) -o $@ $^
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%.o: %.c
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@echo CC $@
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@$(CC) $(CFLAGS) -nostdinc -I. -c $< -o $@
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%.o: %.S
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@echo AS $@
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@$(AS) $(ASFLAGS) -o $@ $<
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qemu: kernel.elf
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@echo QEMU $@
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@qemu-system-riscv64 -machine virt -bios none -nographic -kernel kernel.elf
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clean:
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rm -f *.o *.elf *.d
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-include *.d
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