185 lines
5.2 KiB
Makefile
185 lines
5.2 KiB
Makefile
#
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# make的主文件
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#
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# 文件夹
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# OBJ用于存放编译出来的可重定位文件
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OBJDIR := obj
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# INC用于存放各种头文件(*.h)
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INCDIR := include
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# 编译以及日常工具
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CC := gcc
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# 汇编器
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AS := nasm
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# 静态库编辑器
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AR := ar
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# 链接器
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LD := ld
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# 复制文件
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OBJCOPY := objcopy
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# 反编译
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OBJDUMP := objdump
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# 查询可重定位文件符号表
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NM := nm
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DEFS :=
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# gcc的相关命令参数
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# $(DEFS) 定义一些可能的参数
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# -O0 0优化，保证程序按照代码语义走而不被优化，方便调试
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# -fno-builtin 静止使用gcc内置函数，具体查手册
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CFLAGS := $(CFLAGS) $(DEFS) -O0 -fno-builtin
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# -I 编译时去指定文件夹查找头文件
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# -MD 一个黑科技暂时可以不需要了解，总之是在头文件依赖变动的时候能够及时更新target
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CFLAGS += -I $(INCDIR) -MD
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# -fno-stack-protector 禁止栈保护（金丝雀保护机制，内核代码扛不住）
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CFLAGS += -fno-stack-protector
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# -std=gnu99 规定编译的语言规范为gnu99
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CFLAGS += -std=gnu99
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# -fno-pie 不创建动态链接库
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CFLAGS += -fno-pie
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# -static 编译静态程序
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# -m32 编译32位程序
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CFLAGS += -static -m32
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# -g 打开gdb调试信息，能够允许gdb的时候调试
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CFLAGS += -g
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# 一车的warning，在编译的时候可能会很有用
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CFLAGS += -Wall -Wno-format -Wno-unused -Werror
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# ld链接器的相关命令参数
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# -m elf_i386 链接的格式为i386
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LDFLAGS := -m elf_i386
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# -nostdlib 不链接gcc的标准库，用库只能用命令行的
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LDFLAGS += -nostdlib
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# 获取gcc的库文件（除法取模会用到）
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GCC_LIB := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
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# 记录每个OBJDIR里存放的每个子文件夹
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OBJDIRS :=
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# 保证all是第一个target，这样make的时候会先执行all
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# all的依赖会在kern/Makefrag中填充
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all:
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.DELETE_ON_ERROR:
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# xv6黑科技，获取编译命令，如果命令较新则重新编译所有文件
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.PRECIOUS: $(OBJDIR)/.vars.% \
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$(OBJDIR)/kernel/%.o $(OBJDIR)/kernel/%.d \
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$(OBJDIR)/user/%.o $(OBJDIR)/user/%.d \
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$(OBJDIR)/lib/%.o $(OBJDIR)/lib/%.d
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$(OBJDIR)/.vars.%: FORCE
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@echo "$($*)" | cmp -s $@ || echo "$($*)" > $@
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.PHONY: FORCE
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include boot/Makefrag
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include lib/Makefrag
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include kernel/Makefrag
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include user/Makefrag
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include fs_flags/Makefrag
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# FAT32镜像文件
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IMAGE = $(OBJDIR)/a.img
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BUILD_IMAGE_SCRIPT = build_img.sh
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# added by mingxuan 2020-9-12
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# Offset of os_boot in hd
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# 活动分区所在的扇区号
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# OSBOOT_SEC = 4096
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# 活动分区所在的扇区号对应的字节数
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# OSBOOT_OFFSET = $(OSBOOT_SEC)*512
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OSBOOT_OFFSET = 1048576
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# FAT32规范规定os_boot的前89个字节是FAT32的配置信息
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# OSBOOT_START_OFFSET = OSBOOT_OFFSET + 90
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OSBOOT_START_OFFSET = 1048666 # for test12.img
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# added by mingxuan 2020-10-29
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# Offset of fs in hd
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# 文件系统标志所在扇区号 = 文件系统所在分区的第1个扇区 + 1
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# ORANGE_FS_SEC = 6144 + 1 = 6145
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# 文件系统标志所在扇区 = $(ORANGE_FS_SEC)*512
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ORANGE_FS_START_OFFSET = 3146240
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# FAT32_FS_SEC = 53248 + 1 = 53249
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# 文件系统标志所在扇区 = $(ORANGE_FS_SEC)*512
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FAT32_FS_START_OFFSET = 27263488
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# oranges文件系统在硬盘上的起始扇区
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# PART_START_SECTOR = 92049
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PART_START_SECTOR = 6144 # modified by mingxuan 2020-10-12
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# 写入硬盘的起始位置
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# INSTALL_PHY_SECTOR = PART_START_SECTOR + 951 # Why is 951 ?
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INSTALL_PHY_SECTOR = 7095 # modified by mingxuan 2020-10-12
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# assert(INSTALL_PHY_SECTOR > PART_START_SECTOR)
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# 写入硬盘的文件大小
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INSTALL_NR_SECTORS = 1000
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INSTALL_START_SECTOR = $(shell echo $$(($(INSTALL_PHY_SECTOR)-$(PART_START_SECTOR))))
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SUPER_BLOCK_ADDR = $(shell echo $$((($(PART_START_SECTOR)+1)*512)))
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INSTALL_TYPE = INSTALL_TAR
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INSTALL_FILENAME = app.tar
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$(IMAGE): $(OBJDIR)/boot/mbr.bin \
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$(OBJDIR)/boot/boot.bin \
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$(OBJDIR)/boot/loader.bin \
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$(OBJDIR)/kernel/kernel.bin \
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$(BUILD_IMAGE_SCRIPT) \
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$(OBJDIR)/user/$(USER_TAR) \
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$(FS_FLAG_OBJFILES)
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@./build_img.sh $@ $(OBJDIR) $(OSBOOT_START_OFFSET)
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@dd if=$(OBJDIR)/user/$(USER_TAR) of=$@ bs=512 count=$(INSTALL_NR_SECTORS) seek=$(INSTALL_PHY_SECTOR) conv=notrunc
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@dd if=$(OBJDIR)/fs_flags/orange_flag.bin of=$@ bs=1 count=1 seek=$(ORANGE_FS_START_OFFSET) conv=notrunc
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@dd if=$(OBJDIR)/fs_flags/fat32_flag.bin of=$@ bs=1 count=11 seek=$(FAT32_FS_START_OFFSET) conv=notrunc
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all: $(IMAGE)
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clean:
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@rm -rf $(OBJDIR)
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run: $(IMAGE)
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@qemu-system-i386 \
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-boot order=a \
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-drive file=$<,format=raw \
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-serial stdio
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gdb: $(IMAGE)
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@qemu-system-i386 \
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-boot order=a \
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-drive file=$<,format=raw \
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-serial stdio \
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-s -S &
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@x-terminal-emulator -e "make monitor"
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gdb-no-graphic: $(IMAGE)
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@qemu-system-i386 \
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-nographic \
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-boot order=a \
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-drive file=$<,format=raw \
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-s -S \
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# 调试的内核代码elf
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KERNDBG := $(OBJDIR)/kernel/kernel.dbg
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monitor: $(IMAGE)
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@gdb \
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-ex 'set confirm off' \
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-ex 'target remote localhost:1234' \
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-ex 'file $(KERNDBG)'
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disassemble: $(IMAGE)
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@$(OBJDUMP) -S $(KERNDBG) | less
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# 黑科技时间，获取每个.c对应的头文件依赖
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# 挺难整明白的，不建议一开始整明白，反正从xv6上抄的，不明觉厉
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$(OBJDIR)/.deps: $(foreach dir, $(OBJDIRS), $(wildcard $(OBJDIR)/$(dir)/*.d))
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@mkdir -p $(@D)
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@perl mergedep.pl $@ $^
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-include $(OBJDIR)/.deps
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.PHONY: all clean run gdb gdb-no-graphic monitor disassemble |