lordtet
aa4f5f070b
comments for study Also made a makefile that can build and run the thing. Current run method is directly from QEMU - but the makefile will later make an image with a given bootloader.
42 lines
848 B
Makefile
42 lines
848 B
Makefile
# Makefile
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#Some definitions
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SRC_DIR = src
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BUILD_DIR = build
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KERNEL_MAIN = $(SRC_DIR)/main.c
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KERNEL_MAIN_OBJ = $(BUILD_DIR)/main.o
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ENTRY_ASM = $(SRC_DIR)/start.s
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ENTRY_ASM_OBJ = $(BUILD_DIR)/start.o
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LINKING_RECIPE = $(SRC_DIR)/linker.ld
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KERNEL_IMG = $(BUILD_DIR)/mykernel.elf
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QEMU = qemu-system-i386
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GCC = i686-elf-gcc
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#Actual recipe
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all: $(KERNEL_IMG)
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$(BUILD_DIR):
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mkdir -p $(BUILD_DIR)
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$(KERNEL_MAIN_OBJ):
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$(GCC) -std=gnu99 -ffreestanding -g -c $(KERNEL_MAIN) -o $(BUILD_DIR)/main.o
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$(ENTRY_ASM_OBJ):
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$(GCC) -std=gnu99 -ffreestanding -g -c $(ENTRY_ASM) -o $(ENTRY_ASM_OBJ)
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#now kith (link)
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$(KERNEL_IMG): $(KERNEL_MAIN_OBJ) $(ENTRY_ASM_OBJ)
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$(GCC) -ffreestanding -nostdlib -g -T $(LINKING_RECIPE) $(ENTRY_ASM_OBJ) $(KERNEL_MAIN_OBJ) -o $(KERNEL_IMG) -lgcc
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run: all
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$(QEMU) -kernel $(KERNEL_IMG)
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clean:
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rm -rf $(BUILD_DIR)/*
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