android kernel development

Tags: open org bar source download BSP Color class sub FontBasic Porting1. Source code DownloadDownload the latest linux4.9.9 kernel: https://mirrors.edge.kernel.org/pub/linux/kernel/.The third number is the revision number.2. Unzip and configuretar xvf linux-4.9. 9. tar. XZEnter the kernel source directory and: CD linux-4.9. 9 Modify the build toolchain to open

Android deep exploration and HAL-driven development (Volume 1)-Chapter 7, android-driven developmentRelationship between applications, libraries, kernels, and drivers From top to bottom, a software system can be divided into applications, libraries, operating systems (kernels), and drivers. Developers can focus on what they are familiar with. For adjacent layers,

What is the future development direction of Linux kernel-general Linux technology-Linux programming and kernel information? For details, refer to the following. To care about the development of Linux kernel, we can use high-quality Linux. Otherwise, you will feel the same in

. Start the terminal40. Enter the pathwatermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvaxrjyxn0y3bw/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast "/>41. Compile and run42. Write a C + + code 1,CC43. Print statements, C + +44. Print out the results45. Drive HelloWorld#include #include Module_license ("Dual BSD/GPL");//Follow the Linux protocolstatic int hello_init (void){PRINTK (Kern_alert "Hello, world\n");//Print driver informationreturn 0;}static void Hello_exit (void

Preface Today, the error caused by the misuse of the pointer in the drive development: Unable to handle kernel NULL pointer dereference in virtual address xxxxxxxx. This error is what I encountered when I used DMA for the LCD driver, and the error caused by referencing an empty pointer when allocating the memory used for the DMA transfer. The error printing information is as follows: [72.820000] Unable to

ERROR solving emulator: ERROR: This AVD's configuration is missing a kernel file !!, ERROR emulator: ERROR: This AVD's configuration is missing a kernel file !! Solution Cause 2: 1 No. Solution: Download through sdk mangager 2 cannot be found. The solution is to check the path of the system environment variable (most of this happens when both android Studio and E

not exactly the same. Let's take a look at the following example.Http://css3.zxq.net/doraemon/doraemon_css3.html This page is used to test the extent to which the browser supports CSS3. Now we're going to show this page in 2 different ways.private void Form1_Load (object sender, EventArgs e) { WebBrowser browser = new WebBrowser (); Browser. Dock = DockStyle.Fill; Browser. Navigate ("http://css3.zxq.net/doraemon/doraemon_css3.html"); SPLITCONTA

, and their display effect is not exactly the same. Let's take a look at the following example.Http://css3.zxq.net/doraemon/doraemon_css3.html This page is used to test the extent to which the browser supports CSS3. Now we're going to show this page in 2 different ways.private void Form1_Load (object sender, EventArgs e) { WebBrowser browser = new WebBrowser (); Browser. Dock = DockStyle.Fill; Browser. Navigate ("http://css3.zxq.net/doraemon/doraemon_css3.

Five years after running the vxworks driver, I was eager to switch to Linux kernel development. I would like to hear your comments and recommendation companies! -- Linux general technology-Linux programming and kernel information. The following is a detailed description. I have always felt that I am working with no technical experience. After reading the Linux

Menuconfig Arch=armLoad an alternate configuration File->.config->exit->save3.2. Configuration file SystemMake Menuconfig Arch=armGeneral setup->[]initial RAM filesystem and RAM diskFile systems->[*]network file Systems->[*]root file system on NFS4. Compiling kernel4.1. Copy the Mkimage toolCP .../uboot_mini2440/tools/mkimage/bin4.2. Compiling kernelMake Uimage arch=arm cross_compile=arm-linux-5. Compiling the kernel moduleMake Modules Arch=arm cross

Linux Kernel series-12. B. Operating System Development-jump from Loader to protection mode, 12. bloader Now, the kernel has been loaded into the memory. It is time to jump into the protection mode. The first is GDT and the corresponding selector. We only define three descriptors, which are 0 ~ 4 GB executable segment, a 0 ~ A 4 GB read/write segment and a segmen

); initialize Mutexor directly with the #define DEFINE_MUTEX (LOCK) can be;#define__mutex_initializer (lockname) \{. Count= Atomic_init (1),. Wait_lock=__spin_lock_unlocked (Lockname.wait_lock),. Wait_list=list_head_init (lockname.wait_list) __debug_mutex_initializer (lockname) __dep_map_mutex_initializer (lo Ckname)}#defineDefine_mutex (Mutexname)structMutex Mutexname =__mutex_initializer (mutexname)extern void__mutex_init (structMutex *Lock,Const Char*name,structLock_class_key *key);Third: The

documentation, less experience, and more implementation risks. Second, it requires tools and investment to implement SOA. In this case, we would rather repeat development. In the end, the process editing function is not complete, but we still implement a simple process editing in the API. This process editing is implemented by hard coding, it is quite different from our wishes. New Ideas Later, I came to the introduction of a platform soft

files in Linux?16) What are the system calls that create the process?17) How many different ways to call schedule () for process switching?is the Linux scheduler scheduling processes based on the dynamic or static priority of the process?19) which is the core data structure of the process scheduling?20) such as finer, unload a module?21) What space are the modules and applications running separately?Do floating-point operations in Linux be implemented by the application or the

we went to install Hello.ko, there was this error: undefined symbol:This is because of the extern int function () in our program, which is not present in the system. Does that have to Insmod Function.ko first!?Although the system has already appeared function functions, but the system still cannot find. You can see that the error is still there.This is the problem with module export: When we are going to use a variable inside a module, the function must be exported using a symbol. That is, the

Generally, the fully-recorded code is changed to the compiling method that we think is logical, for example, we think that the lichee of quanzhi includes the code of the packaging tool kernel and uboot, which should be placed in the android directory. So we made changes, so the kernel code path is as follows: vendor/softwinner/linux-3.4/Drivers/input/keyboard/the

The 4th chapter: Download and compile the source codeThis chapter is mainly about using git to download two sets of source code, one set is the Android source code, another set of Linux source code. Because the Android kernel is based on the Linux kernel, Android porting is

Linux Kernel Development and Learning Guide for Embedded Systems-Linux general technology-Linux programming and kernel information. For details, see the following. The following figure is taken from instructor Wang honghui's Guide to Linux kernel development in embedded sys

Zhongguancun library building held the road of embedded development, embedded system Linux kernel research expert Wang Hong Hui to -- Linux general technology-Linux programming and kernel information, below is the details to read. The time is, January 1, April 11, with a five-layer multi-function hall. The theme lecture entitled "Jump to science and technology li

A brief introduction of Android studioThe Android Studio IDE (Android Platform integrated development Environment) was first released by the GOOGLEI/O conference in 2013. It is based on the IntelliJ idea development environment and is designed to replace Eclipse and ADT (the