> For the complete documentation index, see [llms.txt](https://richardweiyang-2.gitbook.io/kernel-exploring/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://richardweiyang-2.gitbook.io/kernel-exploring/00_index/08_rule_for_setupbin.md).

# setup.bin的诞生记

书接上回，bzImage由setup.bin和vmlinux.bin两个文件粘合而成。这次我们来看看setup.bin的诞生记。

## 寻找目标

老套路，第一步就是找一下setup.bin这个目标的规则。还记得之前我们走到哪里了么？对，arch/x86/boot/Makefile。

```
$(obj)/setup.bin: $(obj)/setup.elf FORCE
	$(call if_changed,objcopy)
```

下一步呢？ 对了，找cmd\_objcopy。这次定义的地方稍有不同，不在scripts/Makefile.build，而是在scripts/Makefile.lib。

```
# Objcopy
# -------------------------------------

quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
```

原来setup.bin是由setup.elf经过objcopy而来。那看来想要弄清楚就要看看setup.elf的来历。走，既然已经到这里了，那咱就再入一层～

## 深入虎穴

```
$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE
	$(call if_changed,ld)
```

怎么样，现在是不是驾轻就熟了。看到这个也基本能够猜出个八九不离十。setup.elf是由$(SETUP\_OBJS)链接而成的。嗯，没想到这么简单，白白浪费了我这么气势磅礴的一个标题了。

为了弥补点什么，咱把SETUP\_OBJS的内容也给大家展开了。

```
SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
```

原来还套了那么一层:

```
setup-y		+= a20.o bioscall.o cmdline.o copy.o cpu.o cpuflags.o cpucheck.o
setup-y		+= early_serial_console.o edd.o header.o main.o memory.o
setup-y		+= pm.o pmjump.o printf.o regs.o string.o tty.o video.o
setup-y		+= video-mode.o version.o
setup-$(CONFIG_X86_APM_BOOT) += apm.o

# The link order of the video-*.o modules can matter.  In particular,
# video-vga.o *must* be listed first, followed by video-vesa.o.
# Hardware-specific drivers should follow in the order they should be
# probed, and video-bios.o should typically be last.
setup-y		+= video-vga.o
setup-y		+= video-vesa.o
setup-y		+= video-bios.o
```

嗯，够多，终于能勉强配得上咱这个霸气的标题了～

## 图文并茂

setup.bin的编译过程确实简单，来一张图略微总结那么一下子。

```
        a20.o bioscall.o cmdline.o copy.o
        cpu.o cpuflags.o cpucheck.o
        edd.o header.o main.o memory.o
        tty.o pmjump.o printf.o regs.o
        pm.o  string.o video.o
        video-mode.o version.o
        early_serial_console.o

        video-vga.o
        video-vesa.o
        video-bios.o

                    ||
                    ||  <--- arch/x86/boot/setup.ld
                    ||
                    \/

				 setup.elf

                    ||
                    \/

				 setup.bin
```

这么一看，东西还挺多的啊。 好了，这个我们也看完啦，是不是感觉so easy\~

## 未完待续

bzImage的组成部分除了setup.bin还有另一半—vmlinux.bin。是不是它也这么简单明了呢？是不是它能解除我们心中的一些疑惑呢？

不要走开，即将呈现～


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://richardweiyang-2.gitbook.io/kernel-exploring/00_index/08_rule_for_setupbin.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.