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SHELL:=/bin/bash
# -mgeneral-regs-only only needed for interrupt handlers
override CFLAGS += \
-nostdlib \
-nostdinc \
-fno-builtin \
-fno-stack-protector \
-nostartfiles \
-nodefaultlibs \
-mgeneral-regs-only \
-Wall \
-Wextra
STAGE3 = \
stage3/init.o \
stage3/main.o \
stage3/gfx.o \
stage3/halt.o \
stage3/interrupts.o \
stage3/isr.o \
stage3/pic.o \
stage3/memory.o \
stage3/paging.o \
stage3/heap.o \
stage3/font.o \
stage3/font_classic.o \
stage3/ata.o \
stage3/string.o \
stage3/pci.o \
stage3/fs.o \
stage3/yield.o \
stage3/ps2.o \
stage3/thread.o \
stage3/shell.o \
stage3/version.o
PAD_BOUNDARY = pad() { truncate -s $$(echo "($$(du -b $$1 | cut -f1)+$$2-1)/$$2*$$2" | bc) $$1; }; pad
DISAS = objdump -b binary -D -M intel -m i386:x86-64 stage3.bin --adjust-vma 0x9000
cuddles.img: stage1.bin stage2.bin stage3.bin fs.tar
cat stage{1,2,3}.bin fs.tar > cuddles.img
$(PAD_BOUNDARY) cuddles.img 1048576
stage1.bin: stage1/main.asm stage1/print.asm stage2.bin stage3.bin
nasm -f bin stage1/main.asm -o stage1.bin \
-dKSIZE=$$(du -cb stage{2,3}.bin | tail -n1 | cut -f1)
stage2.bin: stage2/main.asm stage2/mmap.asm stage2/paging.asm stage2/vesa.asm stage1/print.asm
nasm -f bin stage2/main.asm -o stage2.bin
truncate -s 4608 stage2.bin
stage3.bin fs/dbg/kernel.map: $(STAGE3) stage3.ld
mkdir -p fs/dbg/
ld $(STAGE3) -T stage3.ld -Map=fs/dbg/kernel.map
$(PAD_BOUNDARY) stage3.bin 512
fs/dbg/kernel.dis.asm: stage3.bin
mkdir -p fs/dbg/
$(DISAS) > fs/dbg/kernel.dis.asm
stage3/%.o: stage3/%.asm
nasm -f elf64 $< -o $@
stage3/%.o: stage3/%.c
gcc $(CFLAGS) -c $< -o $@
GIT_VERSION := $(shell git describe --tags 2>/dev/null || git rev-parse --short HEAD)
stage3/version.c: stage3/version.$(GIT_VERSION).c
cp $< $@
stage3/version.$(GIT_VERSION).c:
rm -f stage3/version.*.c
echo -e "#include \"def.h\"\nstr version = S(\"$(GIT_VERSION)\");" > $@
stage3/isr.asm: stage3/isr.lua
lua stage3/isr.lua > stage3/isr.asm
fs.tar: $(shell find fs | sed 's/ /\\ /g') fs/dbg/kernel.map fs/dbg/kernel.dis.asm
cd fs && tar --format=ustar -cf ../fs.tar *
.PHONY: run clean flash disas qemu bochs
bochs: cuddles.img
rm -f cuddles.img.lock
echo c | bochs -q
qemu: cuddles.img
qemu-system-x86_64 -drive format=raw,file=cuddles.img
qemu_slow: cuddles.img
qemu-system-x86_64 -icount shift=9,align=on,sleep=on -drive format=raw,file=cuddles.img
run: qemu
clean:
rm -rf stage3/*.o *.bin *.img stage3/{isr.asm,version.c,version.*.c} fs.tar fs/dbg
flash: cuddles.img
dd if=cuddles.img of=$(DEV)
disas: stage3.bin
$(DISAS) --disassembler-color=on
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