Open 1939323749 opened 11 months ago
Cross-compiling gcc and gdb is a bit difficult for me, so I used brew to complete this part. It runs well on macOS 13.5! Someone will need it.
# $@ = target file # $< = first dependency # $^ = all dependencies # First rule is the one executed when no parameters are fed to the Makefile C_SOURCE_FILES = $(wildcard kernel/*.c drivers/*.c cpu/*.c libc/*.c) HEADERS = $(wildcard kernel/*.h drivers/*.h cpu/*.h libc/*.h) OBJ = ${C_SOURCE_FILES:.c=.o cpu/interrupt.o} CC = x86_64-elf-gcc # Get x86_64-elf-gcc by `brew install x86_64-elf-gcc` GDB = i386-elf-gdb # Get i386-elf-gdb by `brew install i386-elf-gdb` LD = x86_64-elf-ld # Get x86_64-elf-ld by `brew install x86_64-elf-binutils` CFLAGS = -g all: run kernel.bin: boot/kernel_entry.o ${OBJ} ${LD} -m elf_i386 -o $@ -Ttext 0x1000 --entry _start $^ --oformat binary kernel.elf: boot/kernel_entry.o ${OBJ} ${LD} -m elf_i386 -o $@ -Ttext 0x1000 --entry _start $^ kernel_entry.o: kernel_entry.asm nasm $< -f elf -o $@ kernel.o: kernel.c ${CC} -m32 -march=i386 -ffreestanding -c $< -o $@ kernel.dis: kernel.bin ndisasm -b 32 $< > $@ bootsect.bin: bootsect.asm nasm $< -f bin -o $@ os-image.bin: boot/bootsect.bin kernel.bin cat $^ > $@ run: os-image.bin qemu-system-i386 -fda $< debug: os-image.bin kernel.elf qemu-system-i386 -s -fda os-image.bin & ${GDB} -ex "target remote localhost:1234" -ex "symbol-file kernel.elf" %.o : %.c ${HEADERS} ${CC} ${CFLAGS} -m32 -march=i386 -ffreestanding -c $< -o $@ %.o : %.asm nasm $< -f elf -o $@ %.bin : %.asm nasm $< -f bin -o $@ clean: rm -fr *.bin *.dis *.o os-image.bin *.elf rm -fr kernel/*.o boot/*.bin boot/*.o drivers/*.o cpu/*.o libc/*.o
You can also use i686-elf-gcc and ld and skip the flag requiring the output to be i386
Cross-compiling gcc and gdb is a bit difficult for me, so I used brew to complete this part. It runs well on macOS 13.5! Someone will need it.