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_ 13 14# unwind/backtrace related 15UNWIND_ENABLE ?= yes 16CFLAGS_UNWIND = 17LDFLAGS_UNWIND = 18RUSTFLAGS_UNWIND = 19ifeq ($(UNWIND_ENABLE), yes) 20 CFLAGS_UNWIND = -funwind-tables 21 LDFLAGS_UNWIND = --eh-frame-hdr 22 RUSTFLAGS_UNWIND = -Cforce-unwind-tables -Clink-arg=-Wl,eh_frame.ld 23endif 24 25CFLAGS = $(GLOBAL_CFLAGS) -fno-pie $(CFLAGS_UNWIND) -D $(PIC) -I $(shell pwd) -I $(shell pwd)/include -I $(shell pwd)/arch/x86_64/include 26 27export ASFLAGS := --64 28 29LD_LIST := head.o 30 31 32kernel_subdirs := common driver debug arch exception smp sched syscall ktest libs time 33 34 35head.o: head.S 36 $(CC) -E head.S > _head.s # 预处理 37 $(AS) $(ASFLAGS) -o head.o _head.s 38 39 40main.o: main.c 41# -fno-builtin: 不使用C语言内建函数 42# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture. 43 $(CC) $(CFLAGS) -c main.c -o main.o 44 45kernel_rust: 46 rustup default nightly 47 48 RUSTFLAGS="$(RUSTFLAGS_UNWIND)" cargo +nightly-2023-01-21 build --release --target ./arch/x86_64/x86_64-unknown-none.json 49all: kernel 50 51 @echo "Linking kernel..." 52 $(LD) -b elf64-x86-64 -z muldefs $(LDFLAGS_UNWIND) -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a -T link.lds --no-relax 53# 生成kallsyms 54 current_dir=$(pwd) 55 56 @dbg='debug';for x in $$dbg; do \ 57 cd $$x;\ 58 $(MAKE) generate_kallsyms kernel_root_path="$(shell pwd)"||exit 1;\ 59 cd ..;\ 60 done 61 62 63# 重新链接 64 @echo "Re-Linking kernel..." 65 @echo $(shell find . -name "*.o") 66 $(LD) -b elf64-x86-64 -z muldefs $(LDFLAGS_UNWIND) -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a ./debug/kallsyms.o -T link.lds --no-relax 67 @echo "Generating kernel ELF file..." 68# 生成内核文件 69ifeq ($(UNWIND_ENABLE), yes) 70 $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 kernel ../../bin/kernel/kernel.elf 71else 72 $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 -R ".eh_frame" kernel ../../bin/kernel/kernel.elf 73endif 74 @echo "Kernel Build Done." 75 76ECHO: 77 @echo "$@" 78 79$(kernel_subdirs): ECHO 80 81 $(MAKE) -C $@ all CFLAGS="$(CFLAGS)" ASFLAGS="$(ASFLAGS)" PIC="$(PIC)" kernel_root_path="$(shell pwd)" 82 83kernel: head.o main.o $(kernel_subdirs) kernel_rust 84 85 86 87clean: 88 cargo clean 89 rm -rf $(GARBAGE) 90 @list='$(kernel_subdirs)'; for subdir in $$list; do \ 91 echo "Clean in dir: $$subdir";\ 92 cd $$subdir && $(MAKE) clean;\ 93 cd .. ;\ 94 done 95