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慢慢欣赏linux 生成内核镜像all: bzImage	#arch/x86/Makefile	||	\/	bzImage: vmlinux		$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)			||			\/	//vmlinux展开，进入根目录的Makefile			# vmlinux image - including updated kernel symbols			vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE				$(call if_changed_rule,vmlinux__)						||						\/						define rule_vmlinux__							:							$(call cmd,vmlinux__)						endef							||							\/	//关键是vmlinux-lds链接脚本，决定内核镜像的布局							quiet_cmd_vmlinux__ ?= LD      $@							  cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \							  -T $(vmlinux-lds) $(vmlinux-init)                          \							  --start-group $(vmlinux-main) --end-group                  \							  $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)		||	//KBUILD_IMAGE在arch\x86\Makefile里面定义，的定义如下：KBUILD_IMAGE := $(boot)/bzImage; 		||	//boot也在arch\x86\Makefile定义，定义如下：boot := arch/x86/boot		||	//build在scripts/Makefile.build里面定义，定义如下：build := -f scripts/Makefile.build obj		\/	//展开		make build := -f scripts/Makefile.build obj=arch/x86/boot arch/x86/boot/bzImage		||		\/	//继续展开，进入arch/x86/boot/Makefile		$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin $(obj)/tools/build FORCE			$(call if_changed,image)											||											\/	//$(obj)/vmlinux.bin目标定义											$(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE												$(call if_changed,objcopy)																||																\/	//$(obj)/compressed/vmlinux目标定义																$(obj)/compressed/vmlinux: FORCE																	$(MAKE) $(build)=$(obj)/compressed $@																					||																					\/																					$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE																						$(call if_changed,ld)																						@:																																							||																																							\/																																							$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE																																								$(call if_changed,mkpiggy)																																											||																																											\/	//suffix-y代表压缩模式，由CONFIG_KERNEL_XXX决定																																											$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE																																												$(call if_changed,gzip)																																																		suffix-$(CONFIG_KERNEL_GZIP)	:= gz																																											$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE																																												$(call if_changed,bzip2)																																											$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE																																												$(call if_changed,lzma)																																											$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE																																												$(call if_changed,lzo)																																											suffix-$(CONFIG_KERNEL_GZIP)	:= gz																																											suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2																																											suffix-$(CONFIG_KERNEL_LZMA)	:= lzma																																											suffix-$(CONFIG_KERNEL_LZO) 	:= lzo																																										||																																										\/																																										cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )																	||																	\/

linux内核vmlinux的编译过程（七）

https://blog.csdn.net/m0_47799526/article/details/106202622

linux内核学习（10）启动全过程概述之一

https://blog.csdn.net/cug_fish_2009/article/details/6516403

linux源码Makefile的详细分析

https://www.cnblogs.com/amanlikethis/p/3675486.html

linux2.6 makefile分析

https://www.xuebuyuan.com/3121989.html