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- SUBDIR_ROOTS := . common
- DIRS := . $(shell find $(SUBDIR_ROOTS) -type d)
- GARBAGE_PATTERNS := *.o *.s~ *.s *.S~ *.c~ *.h~ kernel *.a
- GARBAGE := $(foreach DIR,$(DIRS),$(addprefix $(DIR)/,$(GARBAGE_PATTERNS)))
- all: kernel
- objcopy -I elf64-x86-64 -S -R ".eh_frame" -R ".comment" -O binary kernel ../bin/kernel/kernel.bin
- kernel: head.o main.o printk.o
- ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o printk.o -T link.lds
- head.o: head.S
- gcc -E head.S > head.s # 预处理
- as --64 -o head.o head.s
- main.o: main.c
- # -fno-builtin: 不使用C语言内建函数
- # The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
- gcc -mcmodel=large -fno-builtin -m64 -c main.c -fno-stack-protector
- printk.o: common/printk.c
- gcc -mcmodel=large -fno-builtin -m64 -c common/printk.c -fno-stack-protector
- clean:
- rm -rf $(GARBAGE)
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