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Author: acteam-ux

Makefile

@@ -0,0 +1,51 @@
+# $@ = target file
+# $< = first dependency
+# $^ = all dependencies
+
+# detect all .o files based on their .c source
+C_SOURCES = $(wildcard kernel/*.c drivers/*.c cpu/*.c)
+HEADERS = $(wildcard kernel/*.h  drivers/*.h cpu/*.h)
+OBJ_FILES = ${C_SOURCES:.c=.o cpu/interrupt.o}
+
+# First rule is the one executed when no parameters are fed to the Makefile
+all: run
+
+# Notice how dependencies are built as needed
+kernel.bin: boot/kernel_entry.o ${OBJ_FILES}
+	ld -m elf_i386 -o $@ -Ttext 0x1000 $^ --oformat binary
+
+os-image.bin: boot/mbr.bin kernel.bin
+	cat $^ > $@
+
+run: os-image.bin
+	qemu-system-i386 -fda $<
+
+echo: os-image.bin
+	xxd $<
+
+# only for debug
+kernel.elf: boot/kernel_entry.o ${OBJ_FILES}
+	ld -m elf_i386 -o $@ -Ttext 0x1000 $^
+
+debug: os-image.bin kernel.elf
+	qemu-system-i386 -s -S -fda os-image.bin -d guest_errors,int &
+	i386-elf-gdb -ex "target remote localhost:1234" -ex "symbol-file kernel.elf"
+
+%.o: %.c ${HEADERS}
+	gcc -g -m32 -ffreestanding -c $< -o $@ -fno-PIC # -g for debugging
+
+%.o: %.asm
+	nasm $< -f elf -o $@
+
+%.bin: %.asm
+	nasm $< -f bin -o $@
+
+%.dis: %.bin
+	ndisasm -b 32 $< > $@
+
+clean:
+	$(RM) *.bin *.o *.dis *.elf
+	$(RM) kernel/*.o
+	$(RM) boot/*.o boot/*.bin
+	$(RM) drivers/*.o
+	$(RM) cpu/*.o