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# unwind/backtrace related 12UNWIND_ENABLE ?= yes 13CFLAGS_UNWIND = 14LDFLAGS_UNWIND = 15RUSTFLAGS_UNWIND = 16ifeq ($(UNWIND_ENABLE), yes) 17 CFLAGS_UNWIND = -funwind-tables 18 LDFLAGS_UNWIND = --eh-frame-hdr 19 RUSTFLAGS_UNWIND = -Cforce-unwind-tables -Clink-arg=-Wl,eh_frame.ld 20endif 21 22CFLAGS = $(GLOBAL_CFLAGS) -fno-pie $(CFLAGS_UNWIND) -I $(shell pwd) -I $(shell pwd)/include -I $(shell pwd)/arch/x86_64/include 23 24export ASFLAGS := --64 25 26LD_LIST := head.o 27 28 29kernel_subdirs := common driver debug arch exception smp syscall ktest libs time 30 31 32head.o: head.S 33 $(CC) -E head.S > _head.s # 预处理 34 $(AS) $(ASFLAGS) -o head.o _head.s 35 36 37main.o: main.c 38# -fno-builtin: 不使用C语言内建函数 39# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture. 40 $(CC) $(CFLAGS) -c main.c -o main.o 41 42kernel_rust: 43 RUSTFLAGS="$(RUSTFLAGS_UNWIND)" cargo +nightly-2023-01-21 build --release --target ./arch/x86_64/x86_64-unknown-none.json 44 45all: kernel 46 47 @echo "Linking kernel..." 48 $(LD) -b elf64-x86-64 -z muldefs $(LDFLAGS_UNWIND) -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a -T link.lds --no-relax 49# 生成kallsyms 50 current_dir=$(pwd) 51 52 @dbg='debug';for x in $$dbg; do \ 53 cd $$x;\ 54 $(MAKE) generate_kallsyms kernel_root_path="$(shell pwd)"||exit 1;\ 55 cd ..;\ 56 done 57 58 59# 重新链接 60 @echo "Re-Linking kernel..." 61 @echo $(shell find . -name "*.o") 62 $(LD) -b elf64-x86-64 -z muldefs $(LDFLAGS_UNWIND) -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a ./debug/kallsyms.o -T link.lds --no-relax 63 @echo "Generating kernel ELF file..." 64# 生成内核文件 65ifeq ($(UNWIND_ENABLE), yes) 66 $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 kernel ../../bin/kernel/kernel.elf 67else 68 $(OBJCOPY) -I elf64-x86-64 -O elf64-x86-64 -R ".eh_frame" kernel ../../bin/kernel/kernel.elf 69endif 70 @echo "Kernel Build Done." 71 72ECHO: 73 @echo "$@" 74 75$(kernel_subdirs): ECHO 76 77 $(MAKE) -C $@ all CFLAGS="$(CFLAGS)" ASFLAGS="$(ASFLAGS)" kernel_root_path="$(shell pwd)" 78 79kernel: head.o main.o $(kernel_subdirs) kernel_rust 80 81 82 83clean: 84 cargo clean 85 rm -rf $(GARBAGE) 86 @list='$(kernel_subdirs)'; for subdir in $$list; do \ 87 echo "Clean in dir: $$subdir";\ 88 cd $$subdir && $(MAKE) clean;\ 89 cd .. ;\ 90 done 91