kernel ost

Data exchange between linux kernel and user layer and linux Kernel 1. There are basically System Call interfaces file_operation interfaces: read write ioctl? Module param of module driver (module parameters of module driver ). 2. kernel startup parameters :?By identifying the parameters passed by bootloader?_ Setup ("para_name =", parse_func) 3. asynchronous no

Linux kernel design and implementation (1)-Introduction to the kernel this section briefly introduces the basic concepts related to the kernel. Main content: single-core and micro-kernel version 1. single-core and micro-kernel www.2cto.com principle advantages and disadvanta

Linux Kernel development-Process Control and Linux kernel development process This chapter mainly analyzes the definition, status, data structure, and other concepts of processes from the perspective of code. Process Definition A process is a running program and a dynamic executable entity. A program is a collection of code and data. A code is a static entity and can be used by multiple processes, for exam

1, complete the following practical work, and screenshots Instructions practice steps: 1) Install the virtual machine VMware workstation;2) in the virtual machine installed linux2.x; 3) upgrade the Linux 2.x kernel to Linux 3.x by self-compiling.1) Install the VMware Workstation 11.1.0.2) Install Ubuntu 10.04 LTS (Ubuntu-10.04-desktop-i386.iso) in the virtual machine with a Linux kernel version of 2.6.32.3)

Understanding of linux User Mode and kernel mode switching, linux User Mode Kernel 1. Differences between the concepts of user State and kernel state What is the user State and kernel state? These two basic concepts have never been fully understood before, the root cause is that most of the time we focus on programming

Chapter One: Introduction to the Kernel The scope of the processor's activity at any given point in time: A, run in the kernel space, in the process context, on behalf of a specific process execution; b, running in kernel space, in the interrupt context, regardless of any process, handling a particular interrupt; C, run in user space, execute user process. When a

One, the Linux kernel compared to the traditional Unix kernel comparison:(1): Linux supports dynamic kernel modules. Although the Linux kernel is also a monolithic structure, it allows dynamic removal (rmmod xxx) and loading of kernel modules (Insmod Xxx.ko) when needed.(2):

Advantages and disadvantages of Linux device driver dynamic kernel insertion and direct integration into the kernel analysis Introduction: The company made a Linux-based Ethernet interface board, which is currently maintained by me, the main CPU of this board uses PowerPC, run the Linux system and add two external DPRAM modules. DPRAM uses the character device driver... advantages and disadvantages of Linux

X86 platform: The Linux system compiles the configuration kernel and starts the kernel This article turns from: http://blog.chinaunix.net/uid-25811099-id-1704590.html PC System: Windows XP Virtual machine: VMware 6.5.1 build-126130 Virtual machine system: Linux system (provided on version:2.6.25-14.fc9.i686 friendly CD) compile kernel version: linux-2.6.3 2 The

Linus Torvalds has upgraded the Linux kernel to Kernel 4.0.2, new kernel patches and newer Bluetooth, USB, SCSI, ACPI drivers, increased NFS and EXT4, and improved ARM64 and PowerPC architectures.In addition to updated drivers, enhanced support for new devices and file systems also brings the long-awaited life patching feature, allowing users to update the

Kernel and operating systemBecause of the flaws in the design of some commercial operating systems and the increasing complexity of the system, the concept of "operating system" has become ambiguous for many people. Before we further discuss the topic of the Linux kernel, we first distinguish between the concepts of "kernel" and "operating system". opera

Specific questions Reference Solutions Solution Ideas Deep solution 1. Specific questions:After porting the kernel of 3.6.6, download the startup card to die, specifically the serial printing information stuck in "uncompressing Linux ... done, booting the kernel."2. Reference Solution:According to the online statement to ensure that the following conditions: 2.1 Core clock frequenc

Today is Laba Festival, said the woman ticket to give me to do the Laba porridge is so bad, so sad, good-hearted acid ah, it seems that the code is really annoying drops, so I warned you technical male wake alarm, do not want me to the same, or you can only and the Code as companion ~ ~ said no Laba porridge but there is code, and you have the support of readers , so you have to continue to write down, calm down, complete the Linux kernel learning, ad

One pageThe kernel takes the physical page as the basic unit of memory management; the Memory Management Unit (MMU) transforms the virtual address into a physicalAddresses, which are typically processed in pages. The MMU manages the tables in the system in the page size unit.32-bit system: Page size 4KB64-bit system: Page size 8KBThe kernel represents each physical page in the system with the corresponding

.....Today, we upgraded Ubuntu 14.04 to the latest kernel version of 4.0.5, which was not intended to be recorded, but did encounter some problems during the upgrade process, so it was still recorded and shared to the ape friends who met the same problem.Go to the official website to download the latest kernel compression package: https://www.kernel.org/Speed does not give force, can only be used in the vir

Linux Kernel kernel/bpf/verifier. clocal Denial of Service Vulnerability (CVE-2017-17863)Linux Kernel kernel/bpf/verifier. clocal Denial of Service Vulnerability (CVE-2017-17863) Release date:Updated on:Affected Systems: Linux kernel 4.9.x－4.9.71 Description: Bugtraq id: 10

I upgraded Ubuntu14.04 to the latest 4.0.5 kernel version. I didn't plan to record it, But I encountered some problems during the upgrade, So I recorded it, share it with yuanyou who have encountered the same problem. Go to the official website to download the latest kernel compressed package: https://www.kernel.org/speed, just use the thunder in the virtual machine to download it, and then try again. LZ co

Preface In the last few months, I have made a rough research on Linux kernel. Next I need to perform in-depth and detailed analysis. It mainly uses a Development Board of S3C2440 as the hardware entity. It includes the following content: 1 bootloader analysis, mainly uboot, combined with the specific situation of the Development Board. My goal is to explain how uboot works (to be honest, I don't want to be kidnapped by hardware during the analysis, bu

To compile the linux module on the X86 platform, the original operating system is not equipped with the kernel source code. Therefore, the kernel cannot be compiled, and the kernel module cannot be tested. According to a lot of information, I decided to upgrade the linux kernel version. The upgrade is successful. The m

1./proc DirectoryThe Linux kernel provides a mechanism for accessing kernel internal data structures and changing kernel settings at run time through the/proc file system. The proc file system is a pseudo-file system that only exists in memory and does not occupy external memory space. It provides an interface for accessing system