rwildcard=$(wildcard $1$2) $(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2))

ARCH = i386

C_SOURCES = $(call rwildcard,*,*.c)

ASM_SOURCES = $(call rwildcard,libc/*,*.asm)

ASM_KERNEL_SOURCES = $(call rwildcard,kernel/*,*.asm)

ASM_ARCH_SOURCES = $(call rwildcard,arch/$(ARCH)*,*.asm)

OBJ := $(C_SOURCES:.c=.o)

ASM_OBJ := $(ASM_SOURCES:.asm=.o)

ASM_OBJ += $(ASM_KERNEL_SOURCES:.asm=.o)

ASM_OBJ += $(ASM_ARCH_SOURCES:.asm=.o)

CROSS = $(HOME)/opt/cross/

CC = $(CROSS)bin/i686-elf-gcc

AS = yasm

QEMU = $(shell find /usr/bin -name "qemu-system-$(ARCH)")

CCFLAGS = -std=c99 -m32 -ffreestanding -nostdlib -static-libgcc -lgcc \

-I. -Ilibc/include -Iinclude -Ilibc/arch/$(ARCH)/ \

-fno-asynchronous-unwind-tables -fdiagnostics-color=auto \

-ggdb -Wall -Wno-pointer-sign \

-D_POSIX_SOURCE

all: os-image

%.bin: %.asm

@$(AS) -i asm/ $^ -f bin -o $@

@echo "AS $<"

%.o: %.asm

@$(AS) $^ -f elf -g DWARF2 -o $@

@echo "AS $<"

asm/kernel.bin: asm/kernel_entry.o $(OBJ) $(ASM_OBJ)

@ln -fs $(shell $(CC) -print-file-name=libgcc.a)

@echo "LN libgcc.a"

@ld -o kernel.elf \

-zmuldefs \

-m elf_i386 \

--entry=main \

-Ttext=0x10000 \

$^ \

libgcc.a

@echo "LD kernel.elf"

@objcopy --only-keep-debug kernel.elf kernel.sym

@cp kernel.elf kernel_strip.elf

@strip --remove-section=.note.gnu.property kernel_strip.elf 2>/dev/null

@objcopy -O binary kernel_strip.elf asm/kernel.bin

@echo "OC kernel.bin"

%.o: %.c $(C_SOURCES) libc/include/bits/alltypes.h libc/include/bits/syscall.h

@$(CC) $(CCFLAGS) -c $< -o $@

os-image: asm/boot_sect.bin asm/kernel.bin

@cat $^ > os-image

debug:

gdb \

-ex="target remote :1234" \

-ex="symbol-file kernel.elf" \

-ex="set disassembly-flavor intel"

debug-qemu: os-image

$(QEMU) -drive format=raw,file=$^ \

-drive format=raw,file=fat8.img \

-m 256M \

-monitor stdio -m 1 -s -S \

-d guest_errors,cpu_reset,int

clean:

@for f in `find . -path "./fatmnt" -prune \

-o -name "*.bin" \

-o -name "*.o" \

-o -name "os-image" \

-o -name "*.elf" \

-o -name "*.sym" \

-o -wholename "libc/include/bits/*.h" \

-o -name "libgcc.a"`; do \

rm $$f; \

done

tags:

ctags -R

run: os-image

$(QEMU) -drive format=raw,file=$^ \

-drive format=raw,file=fat8.img \

-m 256M

libc/include/bits/syscall.h: libc/arch/$(ARCH)/bits/syscall.h.in

@cp $< $@

@sed -ine 's|__NR_|SYS_|p' $@

@echo "SED $<"

libc/include/bits/alltypes.h: libc/arch/$(ARCH)/bits/alltypes.h.in libc/include/alltypes.h.in tools/mkalltypes.sed

@mkdir -p libc/include/bits/

@sed -f tools/mkalltypes.sed libc/arch/$(ARCH)/bits/alltypes.h.in libc/include/alltypes.h.in > $@

@echo "SED $<"