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C_SOURCES = $(wildcard src/*.c)
C_HEADERS = $(wildcard src/*.h)
C_OBJECTS = ${C_SOURCES:.c=.o}
C_OBJECTD = ${subst src,obj,${C_OBJECTS}}
A_SOURCES = $(wildcard src/*.S)
A_OBJECTS = ${A_SOURCES:.S=.o}
A_OBJECTD = ${subst src,obj,${A_OBJECTS}}
CROSS = arm-none-eabi
CC = ${CROSS}-gcc
AS = ${CROSS}-as
OBJCOPY = ${CROSS}-objcopy
QEMU = qemu-system-arm
GDB = gdb-multiarch
CFLAGS = -mcpu=cortex-a7 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -nostdlib -g
AFLAGS = -mcpu=cortex-a7
.PHONY: clean run run-debug debug export
default: clean build/kernel7.img
build/kernel7.img: build/kernel.elf
${OBJCOPY} $< -O binary $@
build/kernel.list: build/kernel.elf
${OBJDUMP} -D $< > $@
build/kernel-g.elf: ${A_OBJECTD} ${C_OBJECTD}
${CC} -T linker.ld -o $@ ${CFLAGS} $^ -lgcc
build/kernel.elf: ${A_OBJECTD} ${C_OBJECTD}
${CC} -T linker.ld -o $@ -ffreestanding -O2 -nostdlib $^ -lgcc
export: build/kernel.list
cp build/kernel.elf /mnt/c/Local/
obj/%.o: src/%.S
${AS} ${AFLAGS} -g -c $< -o $@
clean:
rm -f obj/*.o build/*.elf build/*.list build/*.img
run: build/kernel.elf
${QEMU} -M raspi2 -kernel $< -m 1G -serial mon:stdio
run-debug: build/kernel-g.elf
${QEMU} -M raspi2 -cpu arm1176 -kernel $< -m 1G -s -S -serial mon:stdio -nographic
debug: build/kernel-g.elf build/kernel.list
${GDB} $< -command=gdbinit
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