Makefile

CROSS_PREFIX ?= arm-none-eabi-

CC := $(CROSS_PREFIX)gcc
OBJCOPY := $(CROSS_PREFIX)objcopy

CFLAGS := -ansi -pedantic -Wall -Wextra -march=armv7-a -msoft-float -fPIE -mapcs-frame -I. -ffreestanding \
		-std=c99 -g
LDFLAGS := -nostdlib -N
LIBS := -lgcc

QEMU := qemu-system-arm
BOARD := realview-pb-a8
CPU := cortex-a8

all: kernel.elf

kernel.elf: kernel.ld bootstrap.o kernel.o uart.o context_switch.o gic.o \
		scheduler.o pipe.o page_alloc.o svc.o svc_entries.o alloc.o print.o irq.o \
		growbuf.o user_pipe_master.o ramdisk.o exec_elf.o tarfs.o \
		exec.o user/syscalls.o slab.o slab_alloc.o
	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS) -Tkernel.ld

ramdisk.o: ramdisk.tar
	$(OBJCOPY) -I binary -O elf32-littlearm -B arm $^ $@ --rename-section .data=ramdisk

ramdisk.tar: \
		user/stupid \
		user/services/pipe_master \
		user/alloc_test \
		user/slab_alloc_test \
		user/print_test \
		user/irq_test \
		user/user_first
	tar cf $@ $^

user/stupid: user/stupid.o uart.o user/syscalls.o

user/services/pipe_master: user/services/pipe_master.o user/syscalls.o user/page_alloc.o alloc.o print.o uart.o

user/alloc_test: user/alloc_test.o alloc.o print.o uart.o user/page_alloc.o user/syscalls.o

user/slab_alloc_test: user/slab_alloc_test.o user/syscalls.o print.o uart.o slab.o slab_alloc.o user/page_alloc.o

user/print_test: user/print_test.o user/syscalls.o print.o uart.o

user/irq_test: user/irq_test.o user/syscalls.o print.o uart.o

user/user_first: user/user_first.o user/syscalls.o print.o uart.o alloc.o user/page_alloc.o user_pipe_master.o

run: kernel.elf
	$(QEMU) -M $(BOARD) -cpu $(CPU) -nographic -kernel kernel.elf

debug: kernel.elf
	$(QEMU) -M $(BOARD) -cpu $(CPU) -nographic -kernel kernel.elf -gdb tcp::1234 -S


clean:
	rm -f *.o *.elf *.tar \
		user/*.o \
		user/stupid \
		user/alloc_test \
		user/slab_alloc_test \
		user/print_test \
		user/irq_test \
		user/user_first \
		user/services/*.o \
		user/services/pipe_master \

%: %.o
	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)

%.o: %.s
	$(CC) $(CFLAGS) -o $@ -c $^