Kernel modules are mostly drivers, both hardware drivers and software drivers. Since this is a tutorial, I want to dive deeper. Of cause, you can build all modules in your kernel, so that you don’t need to deal with this problem. So, next section will teach you how to build a rootfs (root file system) to run a Linux Kernel correctly.įinally, I would like to talk about kernel modules. This indicates that kernel could not complete “init” procedure. So… that’s it!! However!!! it is useless to run it that way because the only thing you can do is watching it printing messages which end up with “kernel panic …. If you read the paragraph above, then you are done!! All you need to do to run a kernel is to specify kernel image with “-kernel” argument to QEMU!! Linux Kernel is a complete program that could be run without other shared libraries. This function saves the time to figure out how to boot Kernel on QEMU. Then, QEMU will uncompress the kernel image to a proper memory location and start to run the kernel code. We could just use “-kernel” to pass kernel image to QEMU. It is a very handy function!! Because of this feature, we don’t need to bother the complicated boot sequence and problems on locating Kernel Image. ![]() QEMU has a command argument called “-kernel”. Here I would like to point out how QEMU boot Linux, which is the most central and fundamental part that one should understand!! ![]() You can Google it to find the detail version. Many people know boot loader and some Linux boot sequence. ![]() I believe this is very comprehensive for someone who want to learn or start a new project on ARM with QEMU or other ARM platforms. The last part is how to run existing kernel and images on QEMU. The second part is a tutorial for building a Linux kernel and rootfs running on QEMU. The first part teaches you how a Linux works from a programmer’s view who wants to port Linux on different platforms, such as QEMU. I use Vexpress as the target board in the tutorial. This post could be very useful for those who want to know how Linux works with minimum requirements (root file system, in short rootfs). I decided to write a comprehensive post to share some knowledge and how to build you own ARM image. Recently, I updated my ARM image and found that it has some difficulties to make an ARM image and could be an impossible job for those who are not familiar with embedded systems. I’ve done all this in a computer running Ubuntu 14.04 with an AMD FX8350 processor and 16 GB RAM.Hello there! I’ve been using QEMU for a while. If you want to give it a try, you’ll need a Linux PC, and patience, as it may take about one day to retrieve the source code, and build everything from source. ![]() I’ve just done that, but unfortunately, albeit the builds complete, I could not manage to start Android L in QEMU yet. Alex Bennée, an engineer working for Linaro, wrote a blog post in Linaro’s Core Dump blog explaining the Android emulator is actually based on QEMU, the differences compared to mainline QEMU, the work they’ve done on Android L at Linaro, and most importantly, provided the basic steps showing how to build and try Android L 64-bit ARM (ARMv8) in QEMU. But thanks to a small team at Linaro, you can now build and run Android L 64-bit ARM in the latest version of QEMU that supports Aarch64. Most people can’t afford Juno Cortex A57/A53 development board, and mobile processors based on the latest 64-bit ARM cores are only expected by early 2015.
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