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