Mise a jour de mon avancement

Makefile

@@ -0,0 +1,111 @@
+SYSTEM?=UEFI
+PLATFORM?=QEMU
+
+QEMU=qemu-system-i386 -enable-kvm -m 512 -monitor stdio -vga virtio
+QEMU_VNC=qemu-system-i386 -m 512 -monitor stdio -vga virtio -display vnc=:1,password=on -audiodev none,id=audio0
+
+ISO_NAME=yoctos.iso
+
+GRUB_CONF=grub/grub.cfg
+
+SYSTEM_OK=0
+ifeq ($(SYSTEM),BIOS)
+GRUB_MKRESCUE_ARGS=
+SYSTEM_OK=1
+endif
+ifeq ($(SYSTEM),UEFI)
+GRUB_MKRESCUE_ARGS=/usr/lib/grub/i386-pc
+SYSTEM_OK=1
+endif
+ifneq ($(SYSTEM_OK),1)
+$(error invalid SYSTEM)
+endif
+
+PLATFORM_OK=0
+ifeq ($(PLATFORM),QEMU)
+CC_DEFINES=-DQEMU
+PLATFORM_OK=1
+endif
+ifeq ($(PLATFORM),PC)
+CC_DEFINES=-DEMULATE_DISK_IN_RAM
+PLATFORM_OK=1
+endif
+ifneq ($(PLATFORM_OK),1)
+$(error invalid PLATFORM)
+endif
+
+ifeq ($(DEBUG),0)
+CC_FLAGS=-O3
+LD_FLAGS=
+else
+CC_FLAGS=-g -O0
+LD_FLAGS=-g
+endif
+
+help:
+	@echo "Available targets:"
+	@echo "run      build the OS ISO image (+ filsystem) and run it in QEMU"
+	@echo "iso      build the OS ISO image (+ filesystem)"
+	@echo "common   build the common object files only"
+	@echo "kernel   build the kernel only"
+	@echo "debug    build the OS ISO image (+ filsystem) and run it in QEMU for debugging"
+	@echo "deploy   build the OS ISO image (+ filsystem) and deploy it to the specified device"
+	@echo "         Requires DEV to be defined (eg. DEV=/dev/sdb)"
+	@echo "clean    clean up everything"
+	@echo ""
+	@echo "Available variables:"
+	@echo "SYSTEM   target system type, either UEFI or BIOS (default: UEFI)"
+	@echo "PLATFORM target platform type, either QEMU or PC (default: QEMU)"
+	@echo "DEBUG    whether to generate debug code, either on or off (default: on)"
+	@echo "DEV      device to deploy the ISO image onto (only used by the \"deploy\" target)"
+	@echo ""
+	@echo "Usage examples:"
+	@echo "make run"
+	@echo "make run SYSTEM=BIOS PLATFORM=QEMU"
+	@echo "make PLATFORM=PC DEBUG=0 DEV=/dev/sdb deploy"
+
+iso: $(ISO_NAME)
+
+msg:
+	@echo "================================================="
+	@echo "Build targeting a $(PLATFORM)/$(SYSTEM) platform" 
+	@echo "================================================="
+
+run: $(ISO_NAME)
+	$(QEMU) -cdrom $<
+
+run_vnc: $(ISO_NAME)
+	$(QEMU_VNC) -cdrom $< 
+
+# The "accel=tcg" option is necessary to be able to debug an ELF within QEMU
+debug: $(ISO_NAME)
+	$(QEMU) -s -S -cdrom $< -machine accel=tcg
+
+# ISO image creation taken from http://wiki.osdev.org/Bare_Bones#Booting_the_Kernel
+# Requires grub-mkrescue and xorriso
+# NOTE: on hosts that boot via UEFI, the path /usr/lib/grub/i386-pc is required
+# by grub-mkrescue otherwise the ISO won't be bootable by qemu.
+$(ISO_NAME): msg $(GRUB_CONF) kernel
+	mkdir -p build/boot/grub build/data/
+	cp $(GRUB_CONF) build/boot/grub/
+	cp kernel/kernel.elf build/boot/
+	grub-mkrescue $(GRUB_MKRESCUE_ARGS) -o $@ build
+	@echo "Built the $@ image for a $(SYSTEM) system."
+
+common:
+	$(MAKE) -C $@ CC_DEFINES=$(CC_DEFINES) CC_FLAGS="$(CC_FLAGS)" LD_FLAGS="$(LD_FLAGS)"
+
+kernel:
+	$(MAKE) -C $@ CC_DEFINES=$(CC_DEFINES) CC_FLAGS="$(CC_FLAGS)" LD_FLAGS="$(LD_FLAGS)"
+
+deploy: $(ISO_NAME)
+	 sudo dd if=/dev/urandom of=$(DEV) bs=1M count=10
+	 sudo dd if=$< of=$(DEV)
+	 sudo sync
+
+clean:
+	/bin/rm -rf build $(ISO_NAME)
+	$(MAKE) -C common clean
+	$(MAKE) -C kernel clean
+
+.PHONY: clean common kernel