Building an embedded Linux system on a VM -- compiling the kernel

Article Title: learn how to build an embedded Linux system on a VM-compile the kernel. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

1. download the kernel

· I used linux-2.4.20.tar.gz (google), copied to the working directory, and decompressed it.

Note: I have installed Redhat9.0 on the VM, downloaded it on XP, and copied it to Redhat through the shared directory of the VM.

2. configure the kernel

· Many configuration options. if you do not understand them, you have changed an option: Set the cpu structure to i386.

Make menuconfig (use other ones: xconfig and so on)

· Establish dependency

Make dep

· Compile the kernel

Make arc = i386 bzImage (you can also use zImage and vmLinuz. what's the difference? learn more)

· BzImage is generated under linux-2.4.20/arc/i386/boot.

Note: accept.

3. create an iso image

· Copy loadlin.exe bzImage to a directory and rename bzImage as vmlinuz

· Write a bat script to automatically run loadlin: loadlin vmlinuz named autoboot. bat

4. Prepare for running

· Create a new virtual machine and select a linux virtual machine

· Set the content of cdrom to an iso image

· Create a new software drive and install a DOS boot print in this software Drive. I use MSDOS710.IMG.

5. run

· Start the VM and enter DOS.

· Iso is identified as three files, namely, C:, and bzImage, from the perspective of autoboot.bat,loadlin.exe and bzImage.

· Run autoboot. bat and start the kernel. the following error occurs: cannot be attached to the root file system. Of course, an error is reported. there is no quote at all :)

So far, a kernel is running, and the next step is to sit on the root file system :)