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I. kernel space The kernel space is mapped by the kernel. It does not change with the process and is fixed. Ii. High-end memory: The physical memory address exceeds MB, which we call high-end memory. 3. kernel space distribution chart (1) The address range of the kernel s

Reverse mobile phone kernel, add debugging support and reverse debugging, and add and debug mobile phone Kernel 0x00 PrefaceAn android application can be debugged only when AndroidManifest is used. the xml display specifies android: debuggable = "true". If the android: debuggable value is not set, the default android: debuggable = "false" is used. Therefore, most published applications cannot be debugged,

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 is written in the form of a character device driver. It is directly integ

One: The origins of LinuxLinux is an open-source computer operating system kernel. It is a Unix-like operating system written in C and POSIX compliant, and Linux was originally developed by Finnish hacker Linus Torvalds to try to provide free and free Unix-like operating systems on the Intel x86 architecture. The program began in 1991 with the help of some minix hackers in the early stages of the program, and today countless programmers around the wor

Design and Implementation of Linux kernel (1)-kernel introduction, This article briefly introduces the basic concepts related to the kernel. Main content: Single Kernel and micro kernel Kernel version number 1. Single

Two Problems in upgrading CentOS 6 Kernel to Kernel 3.x Problem: Before the production of openstack CentOS6.5 template image, the kernel is 2.6.xx, now need to make a kernel for 3. x centos6 image, use rpm package kernel-ml-3.18.3-1.el6.elrepo.x86_64.rpm to upgrade the

Difference: the kernel-devel package only contains the kernel header file and makefile required for the kernel development environment, while the kernel-Souce contains all the kernelSource code.If you only want to develop your own modules, you only need to reference the corresponding

I haven't compiled the kernel for a long time. Recently I want to get the driver. I checked that there are two folders under/usr/src, which are empty and do not have any kernel source code.I used centos 5.1. In fact, the Red Hat series did not include the Linux kernel source code after the appearance of redora, so these headers won't be available at the moment wh

One, user space and kernel space:Users interact with the operating system through user space, and applications developed or used by programmers are located in user space. The user space does not have direct access to the kernel and thus cannot access hardware resources, but it can be accessed through the kernel-defined outermost routines-system transfer.Kernel sp

Linux Components :Core/boot/vmlinuz-versionKernel module:/lib/modules/versionKernel design:Single CoreModular designMicro-coreLoad Module Command :InsmodModprobePseudo File System:/proc/proc/sys: Many of the files in this directory are readable and writable/sysSome files can be writtenTo set kernel parameter values:1. Echo VALUE >/proc/sys/to/somefile (restart will fail)2, sysctl-w Kernel.hostname= "hostname" (restart will expire)3,/etc/sysctl.conf (p

After the BIOS triggers a 0x19 interrupt to load the first sector (512B) of the disk into memory, the computer actually starts executing the program on the disk. And this 512B program Bootsect.s in the first batch of code, at this time the processor is still in real mode memory addressing the maximum range is 1M (0X0000-0XFFFF), next we look at Bootsect.s in the first batch of code to do?Syssize = size of 0x3000//kernel programS

Linux0.11 Start ModeBIOS bootWhen the PC power is turned on, the CPU of the 80X86 structure will automatically enter the real mode and automatically execute the program from 0XFFFF0.This is usually the address in Rom-bios. The BIOS of the PC will perform some system detection and start at Physical address 0 at the beginningInitializes the interrupt vector. The first sector of the bootable device is then read into the memory absolute address 0x7c00, and jumps to thisA place. Bootsect.s/setup.sBoo

how the job of a computer works http://www.cnblogs.com/zhengwei0712/p/5207299.htmljob Two how the operating system works http://www.cnblogs.com/zhengwei0712/p/5234622.htmljob three Linux kernel boot process http://www.cnblogs.com/zhengwei0712/p/5253703.html　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Chapter I.:Linux Development and UNIXChapter II: Kernel Source code acquisition, decom

Description of the processThe three main management functions of the operating system: process management, memory management, file systemTo manage the process, the kernel must have a clear description of each process, and the process descriptor provides the process information that the kernel needs to understand.Process Control block PCB task_struct: Process status, Process-open files, process priority info

20135311 Fu DongAnalyzing the process of creating a new process in the Linux kernel learning contentProcess Control block--PCB TASK_STRUCT data structureThe PCB task_struct contains:进程状态、进程打开的文件、进程优先级信息操作系统管理的三个功能：1.进程管理 2.内存管理 3.文件系统Status of the Linux process:Process State Analysis:The long state is the running status of the process, 1 is not executed, 0 is in execution, and greater than 0 is the pause;*stack is to build a

Liu Chang Original works reproduced please indicate the source "Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000write in frontThis experiment focuses on the process of loading and starting an executable program in the Linux kernel, including the analysis of executables, the loading and linking of executable files, and the process of using GDB to track the EXECVE system to

Because the Linux kernel changes very quickly, each iteration between the data structure, the interface is likely to change, so for our write kernel module compatibility brings some problems, often in a version of the module can be compiled normally, the other module on the compilation failed, this time we need to do the kernel version compatible, Here's how to f

KernelPage Global Directory (PGD)of User process createdIn earlier versions:When you fork a process, you must establish the process's own kernel page directory entry (the kernel page directory entry to the user spacePage directory is placed on a contiguous page of the same physical address, so it cannot be shared, but the kernel page table of all processesProcess

Update kernel : yum-y update View the name of the old kernel : Rpm-qa|grep kernelDelete old kernel : yum-y Remove * * * * * * the kernel nameFor example:Kernel-3.6.7-4.fc16.x86_64Kernel-headers-3.6.7-4.fc16.x86_64Kernel-3.4.9-2.fc16.x86_64Libreport-plugin-kerneloops-2.0.10-3.fc16.x86_64Kernel-3.6.6-1.fc16.x86_64Abrt

AsLinuxOperating System CoreKernelThe latest stable version 2.6.24 is available todayRelease. According to the description of the kernel newbies website, linux Kernel 2.6.24 improved CFS, added tickless support for x86-64, PPC, UML, arm, MIPS and other architectures, added wireless driver and configuration interface, introduced anti-fragmentation patch, enable the MMC layer to support SPI/sdio, add USB auth