1SUBDIR_ROOTS := . 2DIRS := . $(shell find $(SUBDIR_ROOTS) -type d) 3GARBAGE_PATTERNS := *.o *.s~ *.s *.S~ *.c~ *.h~ kernel 4GARBAGE := $(foreach DIR,$(DIRS),$(addprefix $(DIR)/,$(GARBAGE_PATTERNS))) 5 6DIR_LIB=libs 7lib_patterns := *.a 8LIB_FILES := $(foreach DIR,$(DIR_LIB),$(addprefix $(DIR)/,$(lib_patterns))) 9 10 11# 控制操作系统使用的中断控制器 _INTR_8259A_ _INTR_APIC_ 12PIC := _INTR_APIC_ 13CFLAGS = $(GLOBAL_CFLAGS) -D $(PIC) -I $(shell pwd) -I $(shell pwd)/include -I $(shell pwd)/arch/x86_64/include 14 15export ASFLAGS := --64 16 17LD_LIST := head.o 18 19 20kernel_subdirs := common driver process debug arch exception smp sched syscall ktest libs ipc time 21 22 23 24head.o: head.S 25 $(CC) -E head.S > _head.s # 预处理 26 $(AS) $(ASFLAGS) -o head.o _head.s 27 28 29main.o: main.c 30# -fno-builtin: 不使用C语言内建函数 31# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture. 32 $(CC) $(CFLAGS) -c main.c -o main.o 33 34kernel_rust: 35 rustup default nightly 36 cargo +nightly-2023-01-21 build --release --target ./arch/x86_64/x86_64-unknown-none.json 37 38all: kernel 39 40 @echo "Linking kernel..." 41 $(LD) -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a -T link.lds 42# 生成kallsyms 43 current_dir=$(pwd) 44 45 @dbg='debug';for x in $$dbg; do \ 46 cd $$x;\ 47 $(MAKE) generate_kallsyms kernel_root_path="$(shell pwd)"||exit 1;\ 48 cd ..;\ 49 done 50 51 52# 重新链接 53 @echo "Re-Linking kernel..." 54 @echo $(shell find . -name "*.o") 55 $(LD) -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a ./debug/kallsyms.o -T link.lds 56 @echo "Generating kernel ELF file..." 57# 生成内核文件 58 $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 kernel ../../bin/kernel/kernel.elf 59# $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 -R ".comment" -R ".eh_frame" kernel ../../bin/kernel/kernel.elf 60 @echo "Kernel Build Done." 61 62ECHO: 63 @echo "$@" 64 65$(kernel_subdirs): ECHO 66 67 $(MAKE) -C $@ all CFLAGS="$(CFLAGS)" ASFLAGS="$(ASFLAGS)" PIC="$(PIC)" kernel_root_path="$(shell pwd)" 68 69kernel: head.o main.o $(kernel_subdirs) kernel_rust 70 71 72 73clean: 74 cargo clean 75 rm -rf $(GARBAGE) 76 @list='$(kernel_subdirs)'; for subdir in $$list; do \ 77 echo "Clean in dir: $$subdir";\ 78 cd $$subdir && $(MAKE) clean;\ 79 cd .. ;\ 80 done